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Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Solar system fault detection  

DOE Patents [OSTI]

A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

Farrington, R.B.; Pruett, J.C. Jr.

1984-05-14T23:59:59.000Z

2

Solar system fault detection  

DOE Patents [OSTI]

A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

Farrington, Robert B. (Wheatridge, CO); Pruett, Jr., James C. (Lakewood, CO)

1986-01-01T23:59:59.000Z

3

Arc fault detection system  

DOE Patents [OSTI]

An arc fault detection system for use on ungrounded or high-resistance-grounded power distribution systems is provided which can be retrofitted outside electrical switchboard circuits having limited space constraints. The system includes a differential current relay that senses a current differential between current flowing from secondary windings located in a current transformer coupled to a power supply side of a switchboard, and a total current induced in secondary windings coupled to a load side of the switchboard. When such a current differential is experienced, a current travels through a operating coil of the differential current relay, which in turn opens an upstream circuit breaker located between the switchboard and a power supply to remove the supply of power to the switchboard.

Jha, Kamal N. (Bethel Park, PA)

1999-01-01T23:59:59.000Z

4

Arc fault detection system  

DOE Patents [OSTI]

An arc fault detection system for use on ungrounded or high-resistance-grounded power distribution systems is provided which can be retrofitted outside electrical switchboard circuits having limited space constraints. The system includes a differential current relay that senses a current differential between current flowing from secondary windings located in a current transformer coupled to a power supply side of a switchboard, and a total current induced in secondary windings coupled to a load side of the switchboard. When such a current differential is experienced, a current travels through a operating coil of the differential current relay, which in turn opens an upstream circuit breaker located between the switchboard and a power supply to remove the supply of power to the switchboard. 1 fig.

Jha, K.N.

1999-05-18T23:59:59.000Z

5

Row fault detection system  

DOE Patents [OSTI]

An apparatus, program product and method check for nodal faults in a row of nodes by causing each node in the row to concurrently communicate with its adjacent neighbor nodes in the row. The communications are analyzed to determine a presence of a faulty node or connection.

Archer, Charles Jens (Rochester, MN); Pinnow, Kurt Walter (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian Edward (Rochester, MN)

2012-02-07T23:59:59.000Z

6

Observer-based fault detection for nuclear reactors  

E-Print Network [OSTI]

This is a study of fault detection for nuclear reactor systems. Basic concepts are derived from fundamental theories on system observers. Different types of fault- actuator fault, sensor fault, and system dynamics fault ...

Li, Qing, 1972-

2001-01-01T23:59:59.000Z

7

Development of Characterization Technology for Fault Zone Hydrology  

E-Print Network [OSTI]

TECHNOLOGY FOR FAULT ZONE HYDROLOGY Kenzi Karasaki Lawrencefor characterizing the hydrology of fault zones, recognizingstructure of faults to hydrology, that it still may be

Karasaki, Kenzi

2010-01-01T23:59:59.000Z

8

Development of a Hydrologic Characterization Technology for Fault Zones Final Report  

E-Print Network [OSTI]

Hydrologic Characterization Technology of Fault Zones, Phaseof Characterization Technology for Fault Zones, LBNL-1635E,Characterization on Technology of Fault Zones – Phase II

Karasaki, Kenzi

2014-01-01T23:59:59.000Z

9

All row, planar fault detection system  

DOE Patents [OSTI]

An apparatus, program product and method for detecting nodal faults may simultaneously cause designated nodes of a cell to communicate with all nodes adjacent to each of the designated nodes. Furthermore, all nodes along the axes of the designated nodes are made to communicate with their adjacent nodes, and the communications are analyzed to determine if a node or connection is faulty.

Archer, Charles Jens; Pinnow, Kurt Walter; Ratterman, Joseph D; Smith, Brian Edward

2013-07-23T23:59:59.000Z

10

A Parametric Spectral Estimator for Faults Detection in Induction Machines  

E-Print Network [OSTI]

for fault diagnosis in electrical machines. Current spectral estimation is usually performed using classical and productivity of electrical drives. For electrical motors and generators, fault detection is usually performedA Parametric Spectral Estimator for Faults Detection in Induction Machines El Houssin El Bouchikhi

Boyer, Edmond

11

Probabilistic model of fault detection in quantum circuits  

E-Print Network [OSTI]

It is shown that the fault testing for quantum circuits does not follow conventional classical techniques. If probabilistic gate like Hadamard gate is included in a circuit then the classical notion of test vector is shown to fail. We have reported several new and distinguishing features of quantum fault and also presented a general methodology for detection of functional faults in a quantum circuit. The technique can generate test vectors for detection of different kinds of fault. Specific examples are given and time complexity of the proposed quantum fault detection algorithm is reported.

Anindita Banerjee; Anirban Pathak

2009-05-12T23:59:59.000Z

12

Fault Detection and Diagnosis Method for VAV Terminal Units  

E-Print Network [OSTI]

: Air density [kg/m3] NOMENCLATURE REFERENCES 1) IEA Annex 25, Building Optimization and Fault Diagnosis Source Book, Eds. J. Hyvarinen and S. Karki, Technical Research Center of Finland, 1996 2) Harunori Yoshida: Typical Faults of Air Conditioning..., IEA Annex 34 ?Detection and Diagnosis Methods in Real Building?, Eds. A. Dexter and J. Pakanen, Section C.2, pp.143-148, 2001 6) Harunori Yoshida, Sanjay Kumar, Yasunori Morita: Online Fault Detection and Diagnosis in VAV Air Handling Unit by RARX...

Miyata, M.; Yoshida, H.; Asada, M.; Wang, F.; Hashiguchi, S.

2004-01-01T23:59:59.000Z

13

Fault Detection, Identification and Accommodation for an Electro-hydraulic  

E-Print Network [OSTI]

Fault Detection, Identification and Accommodation for an Electro-hydraulic System: An Adaptive in electro-hydraulic systems. It is well known fact that any realistic model of a hydraulic system suffers, such a scheme becomes a natural choice for designing robust fault detection algorithms for electro-hydraulic

Yao, Bin

14

Symbolic identification for fault detection in aircraft gas turbine engines  

E-Print Network [OSTI]

Symbolic identification for fault detection in aircraft gas turbine engines S Chakraborty, S Sarkar and computationally inexpensive technique of component-level fault detection in aircraft gas-turbine engines identification, gas turbine engines, language-theoretic analysis 1 INTRODUCTION The propulsion system of modern

Ray, Asok

15

Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems  

E-Print Network [OSTI]

and weather conditions (e.g., clouds), and the output power of PV systems is directly dependent on solar and mitigate the output power shortage under low levels of solar irradiance. Moreover, PV panels exhibit highly fault detection and tolerance. Our fault detection and tolerance technique reduces output power

Pedram, Massoud

16

The detection of high impedance faults using random fault behavior  

E-Print Network [OSTI]

the energy 120 100 80 O& 60 C Lu 40 20 100 200 300 400 500 600 700 800 900 1000 1100 Cycle Number Figure 1. Typical lugh frequency energy per cycle for an arcing fault. 23 . 055 . 050 . 025 Ol . 020 . 01 5 . 010 . 005 25 50 75 100 125... 150 175 200 225 250 275 500 Cycle Number Figure 2. Typical high frequency energy per cycle for a normal system. 24 3 Vl c uj 2 100 200 300 400 500 600 700 800 900 '1000 1100 Cycle Number Figure 3. Typical high frequency energy per cycle for a...

Carswell, Patrick Wayne

1988-01-01T23:59:59.000Z

17

Fault detection and diagnosis capabilities of test sequence selection  

E-Print Network [OSTI]

Review Fault detection and diagnosis capabilities of test sequence selection methods based on the FSM model T Ramalingam*, Anindya Dast and K ThuIasiraman* Different test sequence selection methods resolution in diagnosing the fault. The test sequence selection methods are then compared based on the length

Thulsiraman, Krishnaiyan

18

All-to-all sequenced fault detection system  

DOE Patents [OSTI]

An apparatus, program product and method enable nodal fault detection by sequencing communications between all system nodes. A master node may coordinate communications between two slave nodes before sequencing to and initiating communications between a new pair of slave nodes. The communications may be analyzed to determine the nodal fault.

Archer, Charles Jens (Rochester, MN); Pinnow, Kurt Walter (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian Edward (Rochester, MN)

2010-11-02T23:59:59.000Z

19

Non-intrusive fault detection in reciprocating compressors  

E-Print Network [OSTI]

This thesis presents a set of techniques for non-intrusive sensing and fault detection in reciprocating compressors driven by induction motors. The procedures developed here are "non-intrusive" because they rely only on ...

Schantz, Christopher James

2011-01-01T23:59:59.000Z

20

Occupancy Based Fault Detection on Building Level - a Feasibility Study  

E-Print Network [OSTI]

-going commissioning and fault detection and diagnostics (FDD) has been performed to improve the current situation of building problems by comparing measured building performance with design predictions [Portland 2003]. For fault detection, different methods... conference on building commissioning, Portland Energy Conservation. Portland. 2003. Methods for automated and continuous commissioning of building systems. US department of commerce, Portland energy conservation inc. Schijndel, A.W.M. van, 2008...

Tuip, B.; Houten, M.; Trcka, M.; Hensen, M.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Development of Hydrologic Characterization Technology of Fault Zones  

SciTech Connect (OSTI)

Through an extensive literature survey we find that there is very limited amount of work on fault zone hydrology, particularly in the field using borehole testing. The common elements of a fault include a core, and damage zones. The core usually acts as a barrier to the flow across it, whereas the damage zone controls the flow either parallel to the strike or dip of a fault. In most of cases the damage zone isthe one that is controlling the flow in the fault zone and the surroundings. The permeability of damage zone is in the range of two to three orders of magnitude higher than the protolith. The fault core can have permeability up to seven orders of magnitude lower than the damage zone. The fault types (normal, reverse, and strike-slip) by themselves do not appear to be a clear classifier of the hydrology of fault zones. However, there still remains a possibility that other additional geologic attributes and scaling relationships can be used to predict or bracket the range of hydrologic behavior of fault zones. AMT (Audio frequency Magneto Telluric) and seismic reflection techniques are often used to locate faults. Geochemical signatures and temperature distributions are often used to identify flow domains and/or directions. ALSM (Airborne Laser Swath Mapping) or LIDAR (Light Detection and Ranging) method may prove to be a powerful tool for identifying lineaments in place of the traditional photogrammetry. Nonetheless not much work has been done to characterize the hydrologic properties of faults by directly testing them using pump tests. There are some uncertainties involved in analyzing pressure transients of pump tests: both low permeability and high permeability faults exhibit similar pressure responses. A physically based conceptual and numerical model is presented for simulating fluid and heat flow and solute transport through fractured fault zones using a multiple-continuum medium approach. Data from the Horonobe URL site are analyzed to demonstrate the proposed approach and to examine the flow direction and magnitude on both sides of a suspected fault. We describe a strategy for effective characterization of fault zone hydrology. We recommend conducting a long term pump test followed by a long term buildup test. We do not recommend isolating the borehole into too many intervals. We do recommend ensuring durability and redundancy for long term monitoring.

Karasaki, Kenzi; Onishi, Tiemi; Wu, Yu-Shu

2008-03-31T23:59:59.000Z

22

Sandia National Laboratories: Arc-Fault Detection  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0Energy Advanced Nuclear EnergyCouncilSandia's Work withArc-Fault

23

On-Line Fault Detection and Compensation of Hydraulic Driven Machines Using Modelling Techniques  

E-Print Network [OSTI]

On-Line Fault Detection and Compensation of Hydraulic Driven Machines Using Modelling Techniques C purpose of hydraulic driven machines as well as for the compensation of incipient faults where applicable: Modelling, Simulation, Hydraulic motors, Fault detection, Fault Compensation 1. Introduction Model

Thawonmas, Ruck

24

Fault Detection Effectiveness of Spathic Test Data Jane Huffman Hayes  

E-Print Network [OSTI]

Fault Detection Effectiveness of Spathic Test Data Jane Huffman Hayes Computer Science Department This paper presents an approach for generating test data for unit-level, and possibly integration-level, testing based on sampling over intervals of the input probability distribution, i.e., one that has been

Hayes, Jane E.

25

Bearing Fault Detection in DFIG-Based Wind Turbines Using the First Intrinsic Mode Function  

E-Print Network [OSTI]

Bearing Fault Detection in DFIG-Based Wind Turbines Using the First Intrinsic Mode Function Y for bearing fault detection in DFIG-based wind turbines. The proposed method uses the first Intrinsic Mode Terms--Wind turbine, Doubly Fed Induction Generator (DFIG), fault detection, bearings, signal processing

Boyer, Edmond

26

Outlier Detection Rules for Fault Detection in Solar Photovoltaic Arrays  

E-Print Network [OSTI]

Abstract-- Solar photovoltaic (PV) arrays are unique power sources that may have uncleared fault current of solar photovoltaic (PV) systems. Different from traditional power sources, solar PV array is unique devices (OCPD). This may be caused by non-linear output characteristics of solar PV arrays, low irradiance

Lehman, Brad

27

Evaluation of a Decoupling-Based Fault Detection and Diagnostic Technique - Part I: Field Emulation Evaluation  

E-Print Network [OSTI]

), evaporator fouling (Evapfoul), liquid-line restriction (Llrestr), low refrigerant charge (Reflow), and refrigerant high charge (Refhigh). Except for refrigerant charge and compressor leakage faults for which five fault levels were introduced, four fault... for these tests. The method could detect low refrigerant charge and loss of compressor performance at the lowest levels introduced and all other faults at the second level. All of the faults could be reliably diagnosed before a 5% degradation in capacity...

Li, H.; Braun, J.

2006-01-01T23:59:59.000Z

28

A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS  

E-Print Network [OSTI]

1 A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS T. I describes a control scheme with fault detection capabilities suitable for application to HVAC systems as a reference of correct operation. Faults that occur in the HVAC system under control cause the PI

29

Exact Computation of Maximally Dominating Faults and Its Application to -Detection Tests  

E-Print Network [OSTI]

Exact Computation of Maximally Dominating Faults and Its Application to -Detection Tests Ilia, IN 47907, USA Abstract ÂŁ -detection test sets for stuck-at faults have been shown to be useful in detecting an important role in controlling the increase in the size of an ÂŁ -detection test set as ÂŁ is increased

Polian, Ilia

30

Performance Study of Enhanced Auto-Associative Neural Networks For Sensor Fault Detection  

E-Print Network [OSTI]

- INTRODUCTION When sensors malfunction, control systems become unreliable. Even with the most sophisticated instruments and control algorithms, a control decision based on faulty data will likely lead to incorrect control actions. ?Sensor Fault Detection...? is usually considered as a subset of fault detection. One of the well known approaches in Fault Detection is the model based approach in which a computational model is designed to predict the real system output while receiving the same input ([7], [8...

Najafi, M.; Culp, C.; Langari, R.

2004-01-01T23:59:59.000Z

31

Neural net application to transmission line fault detection and classification  

E-Print Network [OSTI]

, is to perform fault analysis by expert operators using their knowledge about the power systems and experience with past faults. Because of the time required to deal with complex fault situations, detailed fault analysis can not be performed by human operators...

Rikalo, Igor

1994-01-01T23:59:59.000Z

32

Development of Hydrologic Characterization Technology of Fault Zones  

E-Print Network [OSTI]

rock interaction, fracture interconnectivity, fault-rockvalues, given the interconnectivity of fractures that are

Karasaki, Kenzi

2009-01-01T23:59:59.000Z

33

Final Technical Report Recovery Act: Online Nonintrusive Condition Monitoring and Fault Detection for Wind Turbines  

SciTech Connect (OSTI)

The penetration of wind power has increased greatly over the last decade in the United States and across the world. The U.S. wind power industry installed 1,118 MW of new capacity in the first quarter of 2011 alone and entered the second quarter with another 5,600 MW under construction. By 2030, wind energy is expected to provide 20% of the U.S. electricity needs. As the number of wind turbines continues to grow, the need for effective condition monitoring and fault detection (CMFD) systems becomes increasingly important [3]. Online CMFD is an effective means of not only improving the reliability, capacity factor, and lifetime, but it also reduces the downtime, energy loss, and operation and maintenance (O&M) of wind turbines. The goal of this project is to develop novel online nonintrusive CMFD technologies for wind turbines. The proposed technologies use only the current measurements that have been used by the control and protection system of a wind turbine generator (WTG); no additional sensors or data acquisition devices are needed. Current signals are reliable and easily accessible from the ground without intruding on the wind turbine generators (WTGs) that are situated on high towers and installed in remote areas. Therefore, current-based CMFD techniques have great economic benefits and the potential to be adopted by the wind energy industry. Specifically, the following objectives and results have been achieved in this project: (1) Analyzed the effects of faults in a WTG on the generator currents of the WTG operating at variable rotating speed conditions from the perspective of amplitude and frequency modulations of the current measurements; (2) Developed effective amplitude and frequency demodulation methods for appropriate signal conditioning of the current measurements to improve the accuracy and reliability of wind turbine CMFD; (3) Developed a 1P-invariant power spectrum density (PSD) method for effective signature extraction of wind turbine faults with characteristic frequencies in the current or current demodulated signals, where 1P stands for the shaft rotating frequency of a WTG; (4) Developed a wavelet filter for effective signature extraction of wind turbine faults without characteristic frequencies in the current or current demodulated signals; (5) Developed an effective adaptive noise cancellation method as an alternative to the wavelet filter method for signature extraction of wind turbine faults without characteristic frequencies in the current or current demodulated signals; (6) Developed a statistical analysis-based impulse detection method for effective fault signature extraction and evaluation of WTGs based on the 1P-invariant PSD of the current or current demodulated signals; (7) Validated the proposed current-based wind turbine CMFD technologies through extensive computer simulations and experiments for small direct-drive WTGs without gearboxes; and (8) Showed, through extensive experiments for small direct-drive WTGs, that the performance of the proposed current-based wind turbine CMFD technologies is comparable to traditional vibration-based methods. The proposed technologies have been successfully applied for detection of major failures in blades, shafts, bearings, and generators of small direct-drive WTGs. The proposed technologies can be easily integrated into existing wind turbine control, protection, and monitoring systems and can be implemented remotely from the wind turbines being monitored. The proposed technologies provide an alternative to vibration-sensor-based CMFD. This will reduce the cost and hardware complexity of wind turbine CMFD systems. The proposed technologies can also be combined with vibration-sensor-based methods to improve the accuracy and reliability of wind turbine CMFD systems. When there are problems with sensors, the proposed technologies will ensure proper CMFD for the wind turbines, including their sensing systems. In conclusion, the proposed technologies offer an effective means to achieve condition-based smart maintenance for wind turbines and have a gre

Wei Qiao

2012-05-29T23:59:59.000Z

34

An On-line Method for Stator Fault Detection in Multi-phase PMSM Drives  

E-Print Network [OSTI]

An On-line Method for Stator Fault Detection in Multi-phase PMSM Drives Fabien Meinguet*, Eric deals with an on-line fault detection method for multi-phase PMSM drives. The method is based an original method for detecting an abnormal asymmetrical behavior in five-phase PMSM drives and we apply

Paris-Sud XI, Université de

35

E-Print Network 3.0 - aircraft fault detection Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the next 3 years, we cannot use... aircrafts to detect faults on our new ones. Fuzzy logic converts expert knowledge (usually, rules... ), expressed in natural language, into...

36

FAULT DETECTION AND STATE EVALUATION OF ROTOR BLADES Yuri Petryna, Andreas Knzel, Matthias Kannenberg  

E-Print Network [OSTI]

FAULT DETECTION AND STATE EVALUATION OF ROTOR BLADES Yuri Petryna, Andreas KĂĽnzel, Matthias an approach for cost-effective, serial integrity tests of rotor blades. At that, manufacturing faults shall be automatically detected, localized and assessed with respect to their impact on the integrity of rotor blades

Boyer, Edmond

37

Fault detection and isolation in aircraft gas turbine engines. Part 1: underlying concept  

E-Print Network [OSTI]

307 Fault detection and isolation in aircraft gas turbine engines. Part 1: underlying concept: aircraft propulsion, gas turbine engines, fault detection and isolation, statistical pattern recognition 1 INTRODUCTION Performance and reliability of aircraft gas turbine engines gradually deteriorate over the service

Ray, Asok

38

Modeling and simulation of a reformate supplied PEM fuel cell stack, application to fault detection  

E-Print Network [OSTI]

Modeling and simulation of a reformate supplied PEM fuel cell stack, application to fault detection exchange membrane (PEM) fuel cells are the main type of fuel cell developed for ground vehicle applications tool for thermal characteristic and fault detection of a PEM fuel cell stack. The fuel cell stack model

Paris-Sud XI, Université de

39

Real-time fault detection and isolation in biological wastewater treatment plants  

E-Print Network [OSTI]

Real-time fault detection and isolation in biological wastewater treatment plants F. Baggiani and S@dsi.unifi.it Automatic fault detection is becoming increasingly important in wastewater treatment plant operation, given automation controllers, wastewater treatment INTRODUCTION Real-time monitoring is an increasingly important

40

Method of detecting the direction of arcing faults on power distribution feeders  

E-Print Network [OSTI]

harmonic symmetrical current components under high impedance arcing faults hss been proposed by Raiser of Power Technologies Inc [I]. Other methods using even, odd, and "in-between" harmonics (with respect to the 60 Hz fundamental frequency) have been... and the second based on the "in-between" harmonic frequency current correlation to the voltage of the faulted feeder [8]. Benner has proposed the correlation of voltage to the difference in line current, caused due to an arcing high impedance fault...

Fernando, W. Anand Krisantha

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Detecting Intrusion Faults in Remotely Controlled Systems Salvatore Candido and Seth Hutchinson  

E-Print Network [OSTI]

the design process. With this in mind, researchers have begun to address security issues specific to controlDetecting Intrusion Faults in Remotely Controlled Systems Salvatore Candido and Seth Hutchinson to a remote-controlled system (deemed an "intrusion fault" or "intrusion") despite attempts to conceal

Hutchinson, Seth

42

A Probability Extension of PCA to Detect and Diagnose Sensor Faults in Air Handling Units  

E-Print Network [OSTI]

Due to sensor faults, it is a challenge to successfully detect and diagnose component faults in HVAC systems. The Principal Component Analysis (PCA) method has become a popular method to tackle this problem in recent years, but PCA is not capable...

Li, Z.

2011-01-01T23:59:59.000Z

43

Test generation and fault detection for VLSI PPL circuits  

SciTech Connect (OSTI)

The problem of design for testability of PPL logic circuits is addressed. A test-generation package was developed which utilizes the special features of PPL logic to generate high fault coverage test vectors at a reduced computational cost. The test strategy assumes that one of the scan design techniques is used. A new methodology for test-vectors compaction without compromising the fault coverage is also proposed. A fault-oriented test-generation algorithm combined with a heuristic test-generation algorithm are the essential ingredients of this package. The fault-oriented algorithm uses a modified D-algorithm which includes look-ahead features and a new seven-valued logic to improve the average speed of the test-generation process. Fault coverages in the 90% range were obtained using the test sequences generated by this package.

Amin, A.A.M.

1987-01-01T23:59:59.000Z

44

Development of Characterization Technology for Fault Zone Hydrology  

SciTech Connect (OSTI)

Several deep trenches were cut, and a number of geophysical surveys were conducted across the Wildcat Fault in the hills east of Berkeley, California. The Wildcat Fault is believed to be a strike-slip fault and a member of the Hayward Fault System, with over 10 km of displacement. So far, three boreholes of ~;; 150m deep have been core-drilled and borehole geophysical logs were conducted. The rocks are extensively sheared and fractured; gouges were observed at several depths and a thick cataclasitic zone was also observed. While confirming some earlier, published conclusions from shallow observations about Wildcat, some unexpected findings were encountered. Preliminary analysis indicates that Wildcat near the field site consists of multiple faults. The hydraulic test data suggest the dual properties of the hydrologic structure of the fault zone. A fourth borehole is planned to penetrate the main fault believed to lie in-between the holes. The main philosophy behind our approach for the hydrologic characterization of such a complex fractured system is to let the system take its own average and monitor a long term behavior instead of collecting a multitude of data at small length and time scales, or at a discrete fracture scale and to ?up-scale,? which is extremely tenuous.

Karasaki, Kenzi; Onishi, Tiemi; Gasperikova, Erika; Goto, Junichi; Tsuchi, Hiroyuki; Miwa, Tadashi; Ueta, Keiichi; Kiho, Kenzo; MIyakawa, Kimio

2010-08-06T23:59:59.000Z

45

System for detecting and limiting electrical ground faults within electrical devices  

DOE Patents [OSTI]

An electrical ground fault detection and limitation system for employment with a nuclear reactor utilizing a liquid metal coolant. Elongate electromagnetic pumps submerged within the liquid metal coolant and electrical support equipment experiencing an insulation breakdown occasion the development of electrical ground fault current. Without some form of detection and control, these currents may build to damaging power levels to expose the pump drive components to liquid metal coolant such as sodium with resultant undesirable secondary effects. Such electrical ground fault currents are detected and controlled through the employment of an isolated power input to the pumps and with the use of a ground fault control conductor providing a direct return path from the affected components to the power source. By incorporating a resistance arrangement with the ground fault control conductor, the amount of fault current permitted to flow may be regulated to the extent that the reactor may remain in operation until maintenance may be performed, notwithstanding the existence of the fault. Monitors such as synchronous demodulators may be employed to identify and evaluate fault currents for each phase of a polyphase power, and control input to the submerged pump and associated support equipment.

Gaubatz, Donald C. (Cupertino, CA)

1990-01-01T23:59:59.000Z

46

System and method for motor fault detection using stator current noise cancellation  

DOE Patents [OSTI]

A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to acquire at least on additional set of real-time operating current data from the motor during operation, redefine the noise component present in each additional set of real-time operating current data, and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Nowak, Michael P. (Menomonee Falls, WI); Dimino, Steven A. (Wauwatosa, WI)

2010-12-07T23:59:59.000Z

47

System and method for bearing fault detection using stator current noise cancellation  

DOE Patents [OSTI]

A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to repeatedly receive real-time operating current data from the operating motor and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA); Harley, Ronald G. (Lawrenceville, GA); Theisen, Peter J. (West Bend, WI)

2010-08-17T23:59:59.000Z

48

Remote Fault Detection of Building HVAC System Using a Global Optimization Program  

E-Print Network [OSTI]

fault detection method using the global optimization program Solver® (Frontline Systems, 2000) coupled to a simplified simulation program, which is a coding of the ASHRAE 'Simplified Energy Analysis Procedure' (Knebel, 1983). This approach uses...

Lee, S. U.; Claridge, D. E.

2004-01-01T23:59:59.000Z

49

A Qualitive Modeling Approach for Fault Detection and Diagnosis on HVAC Systems  

E-Print Network [OSTI]

This paper describes the basics and first test results of a model based approach using qualitative modeling to perform Fault Detection and Diagnostics (FDD) on HVAC and R systems. A quantized system describing the qualitative behavior of a...

Muller, T.; Rehault, N.; Rist, T.

2013-01-01T23:59:59.000Z

50

Fault detection in an air-handling unit using residual and recursive parameter identification methods  

SciTech Connect (OSTI)

A scheme for detecting faults in an air-handling unit using residual and parameter identification methods is presented. Faults can be detected by comparing the normal or expected operating condition data with the abnormal, measured data using residuals. Faults can also be detected by examining unmeasurable parameter changes in a model of a controlled system using a system parameter identification technique. In this study, autoregressive moving average with exogenous input (ARMAX) and autoregressive with exogenous input (ARX) models with both single-input/single-output (SISO) and multi-input/single-output (MISO) structures are examined. Model parameters are determined using the Kalman filter recursive identification method. This approach is tested using experimental data from a laboratory`s variable-air-volume (VAV) air-handling unit operated with and without faults.

Lee, W.Y. [Korea Inst. of Energy Research, Taejon (Korea, Republic of); Park, C.; Kelly, G.E. [National Inst. of Standards and Technology, Gaithersburg, MD (United States)

1996-11-01T23:59:59.000Z

51

Permanent Magnets Synchronous Machines Faults Detection and Identification  

E-Print Network [OSTI]

for permanent magnet synchronous machines (PMSM). Two main faults occurring on these machines are identified of the PMSM is devel- oped and simulated using Matlab Simulink. The model enables simulating nominal and faulty PMSM behavior, with several stages of degradation, and is supported by tests results. Specific

Paris-Sud XI, Université de

52

Research on Fault Detection and Diagnosis of Scrolling Chiller with ANN  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China Co ntrol Systems for Energy Efficiency and Comfort, Vol. V-5-3 Research on Fault Detection and Diagnosis of Scrolling Chiller with ANN1 Yuli ZHOU Jie ZHENG Zhiju LIU Chaojie YANG Peng PENG... Chiller of Screw Fault Diagnose Artificial Neural Network 1 INTRODUCTION Artificial neural network based on the knowledge of neural network of human brain is to artificially form neural networks to implement some functions. It has powerful...

Zhou, Y.; Zheng, J.; Liu, Z.; Yang, C.; Peng, P.

2006-01-01T23:59:59.000Z

53

A Comparative Study of Time-Frequency Representations for Fault Detection in Wind Turbine  

E-Print Network [OSTI]

A Comparative Study of Time-Frequency Representations for Fault Detection in Wind Turbine El of wind energy, minimization and prediction of maintenance operations in wind turbine is of key importance. In variable speed turbine generator, advanced signal processing tools are required to detect and diagnose

Paris-Sud XI, Université de

54

Data-driven fault detection and estimation in thermal pulse combustors  

E-Print Network [OSTI]

1097 Data-driven fault detection and estimation in thermal pulse combustors S Chakraborty1 of forthcoming failures and operational disruptions (e.g. flame extinction) in thermal pulse combustors. From on an experimentally validated simulation model of a generic thermal pulse combustor. Keywords: anomaly detection

Ray, Asok

55

Statistical Fault Detection for Parallel Applications with AutomaDeD  

SciTech Connect (OSTI)

Today's largest systems have over 100,000 cores, with million-core systems expected over the next few years. The large component count means that these systems fail frequently and often in very complex ways, making them difficult to use and maintain. While prior work on fault detection and diagnosis has focused on faults that significantly reduce system functionality, the wide variety of failure modes in modern systems makes them likely to fail in complex ways that impair system performance but are difficult to detect and diagnose. This paper presents AutomaDeD, a statistical tool that models the timing behavior of each application task and tracks its behavior to identify any abnormalities. If any are observed, AutomaDeD can immediately detect them and report to the system administrator the task where the problem began. This identification of the fault's initial manifestation can provide administrators with valuable insight into the fault's root causes, making it significantly easier and cheaper for them to understand and repair it. Our experimental evaluation shows that AutomaDeD detects a wide range of faults immediately after they occur 80% of the time, with a low false-positive rate. Further, it identifies weaknesses of the current approach that motivate future research.

Bronevetsky, G; Laguna, I; Bagchi, S; de Supinski, B R; Ahn, D; Schulz, M

2010-03-23T23:59:59.000Z

56

An expert system for fault detection and diagnosis  

E-Print Network [OSTI]

to thank Dr. Ali Abur for his help in setting Eb1TP simulations. I would also lilre to thank Charles Fromen and Don Sevcik both with HLtrP Houston for providing invaluable expertise used in this thesis. TABLE OF CONTENTS CHAPTER Page INTRODUCTION . A... IV EXPERT SYSTEM DESIGN . . A. Introduction B. Rochester DFR Conversion C. EMTP Output File Conversion 46 46 47 54 vn1 CHAPTER Page VI D. Signal Analysis: MATI, AB . E. Fault Diagnosis: CLIPS F. Waveform Presentation: MATLAB G...

Spasojevic, Predrag

1992-01-01T23:59:59.000Z

57

Fault detection and isolation in aircraft gas turbine engines. Part 2: validation on a simulation test bed  

E-Print Network [OSTI]

and model-based information. As aircraft gas turbine engines consist of multiple interconnected compo- nents319 Fault detection and isolation in aircraft gas turbine engines. Part 2: validation of fault detection and isolation (FDI) in aircraft gas turbine engines. The FDI algorithms are built upon

Ray, Asok

58

Fault detection and identification with a new feature selection based on mutual information  

E-Print Network [OSTI]

Process Control (SPC) [6] techniques are used in the case where, for different reasons, one is not able constant or variable time steps). In the frame of the SPC, the 2 hal-00516996,version1-13Sep2010 #12;control charts are very simple and useful fault detection tools. The X [7], CUSUM (CUmulative SUM) [8

Paris-Sud XI, Université de

59

Non-Stationary Spectral Estimation for Wind Turbine Induction Generator Faults Detection  

E-Print Network [OSTI]

- or indirect-drive, fixed- or variable-speed turbine generators, advanced signal processing tools are requiredNon-Stationary Spectral Estimation for Wind Turbine Induction Generator Faults Detection El Houssin- rine current turbine farms implies to minimize and predict maintenance operations. In direct

Paris-Sud XI, Université de

60

Rapid Deployment with Confidence: Calibration and Fault Detection in Environmental Sensor Networks  

E-Print Network [OSTI]

Rapid Deployment with Confidence: Calibration and Fault Detection in Environmental Sensor Networks for Embedded Networked Sensing, UCLA Department of Civil and Environmental Engineering, MIT {nithya, kohler The presence of arsenic in groundwater has led to the largest environmental poisoning in history; tens

Nowak, Robert

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Mechanical fault detection in induction motor drives through stator current monitoring -Theory  

E-Print Network [OSTI]

vibrations lead to acoustic noise, noise monitoring is also a possible approach. However, these methods0 Mechanical fault detection in induction motor drives through stator current monitoring - Theory machines are a key element in many electrical systems. Amongst all types of electric motors, induction

Paris-Sud XI, Université de

62

Advanced Signal Processing Techniques for Fault Detection and Diagnosis in a Wind Turbine  

E-Print Network [OSTI]

rotor bars and bearing damages. Index Terms--Wind turbines, motor current signature analy- sis, time factors, such as wind speed and acoustic noise, wind parks are being mainly constructed offshore. Studies. Different methods of fault detection exist. These include monitoring of the acoustic vibration, internal

Paris-Sud XI, Université de

63

Fault Detection Likelihood of Test Sequence Length Fevzi Belli, Michael Linschulte  

E-Print Network [OSTI]

- ria. Most of the existing approaches are based on test se- quences to be covered when testing GUI [4Fault Detection Likelihood of Test Sequence Length Fevzi Belli, Michael Linschulte University of Applied Sciences Nuremberg, Germany e-mail: harald.stieber@ohm-hochschule.de Abstract-- Testing

Belli, Fevzi

64

Fault Detection, Isolation and Control Reconfiguration of Three-Phase PMSM Drives  

E-Print Network [OSTI]

Fault Detection, Isolation and Control Reconfiguration of Three-Phase PMSM Drives Fabien Meinguet purposes and for transport appli- cations [1], [2]. Although permanent magnet synchronous ma- chines (PMSM. Considering PMSM drives, the neutral accessibility may be an issue since most of the commercial PMSMs have

Paris-Sud XI, Université de

65

Synchronous Machine Faults Detection and Diagnosis for Electro-mechanical Actuators  

E-Print Network [OSTI]

Detection and Isolation system for permanent magnet synchronous machine (PMSM). Two main faults occurring for the machine control. To illustrate the method an application is made on an innovative 12-slots 10-poles PMSM that becomes more and more popular in aeronautics, and on a 9-slots 8-poles PMSM used in critical application

Boyer, Edmond

66

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network [OSTI]

Wright, “Condition monitoring in HVAC subsystems using firstmonitoring packaged HVAC equipment. ASHRAE Transactions”,Detection and Diagnosis of HVAC Systems Using Support Vector

Najafi, Massieh

2010-01-01T23:59:59.000Z

67

active fault detection: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

with wireless communications are the bedrock of an emerging are manifold from diet monitor- ing 18, activity detection 4, 3, and health crisis support 9. We focus...

68

automated fault detection: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

operating system. Our PC client software presently has 20 users. The combination of PIR and PC sensors Delbruck, Tobi 242 Using Specification-Based Intrusion Detection for...

69

Sensor Fault Detection in Power Plants Andrew Kusiak1  

E-Print Network [OSTI]

have been used, preventive maintenance and condition-based maintenance. Preventive maintenance is accom detection systems, which offer cost advantages over the preventive maintenance systems. With the development- plished by regular checking and calibration of sensors, while condition-based maintenance is based

Kusiak, Andrew

70

FAULT DETECTION IN A MULTIVARIATE PROCESS WITH A BAYESIAN NETWORK  

E-Print Network [OSTI]

with simulations in order to analyze and compare his performances to other multivariate chart T² of Hotelling and MEWMA. Keywords: SPC, multivariate, detection, bayesian network, T², MEWMA 1 ­ Introduction Control charts have been widely used in industry. The aim is to monitor the centering and the scattering

Boyer, Edmond

71

A H-infinity Fault Detection and Diagnosis Scheme for Discrete Nonlinear System Using Output Probability Density Estimation  

SciTech Connect (OSTI)

In this paper, a H-infinity fault detection and diagnosis (FDD) scheme for a class of discrete nonlinear system fault using output probability density estimation is presented. Unlike classical FDD problems, the measured output of the system is viewed as a stochastic process and its square root probability density function (PDF) is modeled with B-spline functions, which leads to a deterministic space-time dynamic model including nonlinearities, uncertainties. A weighting mean value is given as an integral function of the square root PDF along space direction, which leads a function only about time and can be used to construct residual signal. Thus, the classical nonlinear filter approach can be used to detect and diagnose the fault in system. A feasible detection criterion is obtained at first, and a new H-infinity adaptive fault diagnosis algorithm is further investigated to estimate the fault. Simulation example is given to demonstrate the effectiveness of the proposed approaches.

Zhang Yumin; Lum, Kai-Yew [Temasek Laboratories, National University of Singapore, Singapore 117508 (Singapore); Wang Qingguo [Depa. Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)

2009-03-05T23:59:59.000Z

72

Sideband Algorithm for Automatic Wind Turbine Gearbox Fault Detection and Diagnosis: Preprint  

SciTech Connect (OSTI)

Improving the availability of wind turbines (WT) is critical to minimize the cost of wind energy, especially for offshore installations. As gearbox downtime has a significant impact on WT availabilities, the development of reliable and cost-effective gearbox condition monitoring systems (CMS) is of great concern to the wind industry. Timely detection and diagnosis of developing gear defects within a gearbox is an essential part of minimizing unplanned downtime of wind turbines. Monitoring signals from WT gearboxes are highly non-stationary as turbine load and speed vary continuously with time. Time-consuming and costly manual handling of large amounts of monitoring data represent one of the main limitations of most current CMSs, so automated algorithms are required. This paper presents a fault detection algorithm for incorporation into a commercial CMS for automatic gear fault detection and diagnosis. The algorithm allowed the assessment of gear fault severity by tracking progressive tooth gear damage during variable speed and load operating conditions of the test rig. Results show that the proposed technique proves efficient and reliable for detecting gear damage. Once implemented into WT CMSs, this algorithm can automate data interpretation reducing the quantity of information that WT operators must handle.

Zappala, D.; Tavner, P.; Crabtree, C.; Sheng, S.

2013-01-01T23:59:59.000Z

73

Advanced technologies for perimeter intrusion detection sensors  

SciTech Connect (OSTI)

The development of integrated circuit fabrication techniques and the resulting devices have contributed more to the advancement of exterior intrusion detectors and alarm assessment devices than any other technology. The availability of this technology has led to the improvements in and further development of smaller more powerful computers, microprocessors, solid state memories, solid state cameras, thermal imagers, low-power lasers, and shorter pulse width and higher frequency electronic circuitry. This paper presents information on planning a perimeter intrusion detection system, identifies the site characteristics that affect its performance, and describes improvements to perimeter intrusion detection sensors and assessment devices that have been achieved by using integrated circuit technology.

Williams, J.D.

1995-03-01T23:59:59.000Z

74

Efficient Detection on Stochastic Faults in PLC Based Automated Assembly Systems With Novel Sensor Deployment and Diagnoser Design  

E-Print Network [OSTI]

In this dissertation, we proposed solutions on novel sensor deployment and diagnoser design to efficiently detect stochastic faults in PLC based automated systems First, a fuzzy quantitative graph based sensor deployment was called upon to model...

Wu, Zhenhua

2012-07-16T23:59:59.000Z

75

Automatic Channel Fault Detection and Diagnosis System for a Small Animal APD-Based Digital PET Scanner  

E-Print Network [OSTI]

Fault detection and diagnosis is critical to many applications in order to ensure proper operation and performance over time. Positron emission tomography (PET) systems that require regular calibrations by qualified scanner operators are good candidates for such continuous improvements. Furthermore, for scanners employing one-to-one coupling of crystals to photodetectors to achieve enhanced spatial resolution and contrast, the calibration task is even more daunting because of the large number of independent channels involved. To cope with the additional complexity of the calibration and quality control procedures of these scanners, an intelligent system (IS) was designed to perform fault detection and diagnosis (FDD) of malfunctioning channels. The IS can be broken down into four hierarchical modules: parameter extraction, channel fault detection, fault prioritization and diagnosis. Of these modules, the first two have previously been reported and this paper focuses on fault prioritization and diagnosis. The purpose of the fault prioritization module is to help the operator to zero in on the faults that need immediate attention. The fault diagnosis module will then identify the causes of the malfunction and propose an explanation of the reasons that lead to the diagnosis. The FDD system was implemented on a LabPET avalanche photodiode (APD)-based digital PET scanner. Experiments demonstrated a FDD Sensitivity of 99.3 % (with a 95% confidence interval (CI) of: [98.7, 99.9]) for major faults. Globally, the Balanced Accuracy of the diagnosis for varying fault severities is 92 %. This suggests the IS can greatly benefit the operators in their maintenance task.

Jonathan Charest; Jean-François Beaudoin; Jules Cadorette; Roger Lecomte; Charles-Antoine Brunet; Réjean Fontaine

2014-06-16T23:59:59.000Z

76

Zhiyu Jiang, Department of Marine Technology & Centre for Ships and Ocean Structures Dynamic response of wind turbines in fault and  

E-Print Network [OSTI]

response of wind turbines in fault and shutdown conditions Zhiyu Jiang Deptartment of Marine Technology://www.newscientist.com/blogs/onepercent/2011/12/why-did-a-wind-turbine-self-co.html #12;3 Zhiyu Jiang, Department of Marine Technology & Centre & Centre for Ships and Ocean Structures Control and protection of wind turbines Emergency shutdown Pitch

Nørvåg, Kjetil

77

Detecting Fractures Using Technology at High Temperatures and...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fractures Using Technology at High Temperatures and Depths - Geothermal Ultrasonic Fracture Imager (GUFI); 2010 Geothermal Technology Program Peer Review Report Detecting...

78

Applied change of mean detection techniques for HVAC fault detection and diagnosis and power monitoring  

E-Print Network [OSTI]

A signal processing technique, the detection of abrupt changes in a time-series signal, is implemented with two different applications related to energy use in buildings. The first application is a signal pre-processor for ...

Hill, Roger Owen

1995-01-01T23:59:59.000Z

79

Application of black-box models to HVAC systems for fault detection  

SciTech Connect (OSTI)

This paper describes the application of black-box models for fault detection and diagnosis (FDD) in heating, ventilating, and air-conditioning (HVAC) systems. In this study, multiple-input/single-output (MISO) ARX models and artificial neural network (ANN) models are used. The ARX models are examined for different processes and subprocesses and compared with each other. Two types of models are established--system models and component models. In the case of system models, the HVAC system as a whole is regarded as a black box instead of as a collection of component models. With the component model type, the components of the HVAC system are regarded as separate black boxes.

Peitsman, H.C. [TNO Building and Construction Research, Delft (Netherlands). Dept. of Indoor Environment, Building Physics and Systems; Bakker, V.E. [Univ. of Twente, Enschede (Netherlands). Dept. of Computer Science

1996-11-01T23:59:59.000Z

80

Feature Extraction for Data-Driven Fault Detection in Nuclear Power Plants Xin Jin, Robert M. Edwards and Asok Ray  

E-Print Network [OSTI]

Feature Extraction for Data-Driven Fault Detection in Nuclear Power Plants Xin Jin, Robert M monitoring of nuclear power plants (NPP) is one of the key issues addressed in nuclear energy safety research is performed during each nuclear power plant refueling outage, which may not be cost effective [1

Ray, Asok

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

E-Print Network 3.0 - adaptive fault detection Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

or fault-free path. Therefore, the issue... present a technique to enhance minimal, fully-adaptive routing al- gorithms ... Source: Boppana, Rajendra V. - Department of Computer...

82

R&K Cyber Solutions licenses ORNL malware detection technology...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

R&K Cyber Solutions licenses ORNL malware detection technology R&K Cyber Solutions LLC has licensed Hyperion, a cyber security technology from the Department of Energy's Oak Ridge...

83

A hybrid system for fault detection and sensor fusion based on fuzzy clustering and artificial immune systems  

E-Print Network [OSTI]

A HYBRID SYSTEM FOR FAULT DETECTION AND SENSOR FUSION BASED ON FUZZY CLUSTERING AND ARTIFICIAL IMMUNE SYSTEMS A Dissertation by MOHAMMAD ABDEL KAREEM RASHEED JARADAT Submitted to the Office of Graduate Studies of Texas A... CLUSTERING AND ARTIFICIAL IMMUNE SYSTEMS A Dissertation by MOHAMMAD ABDEL KAREEM RASHEED JARADAT Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR...

Jaradat, Mohammad Abdel Kareem Rasheed

2007-04-25T23:59:59.000Z

84

Abstract--A method for fault detection and isolation is proposed and applied to inverter faults in multi-phase drives. An  

E-Print Network [OSTI]

energy source, a five- leg inverter and a five-phase star-connected PMSM. It has to be noticed that all-magnet synchronous machine (PMSM) drive. The faults under consideration are: open-phase faults and open-switch faults

Boyer, Edmond

85

Fault detection methods for vapor-compression air conditioners using electrical measurements  

E-Print Network [OSTI]

(cont.) This method was experimentally tested and validated on a commercially available air handler and duct system. In the second class of faults studied, liquid refrigerant, rather than vapor, enters the cylinder of a ...

Laughman, Christopher Reed.

2008-01-01T23:59:59.000Z

86

Technologies for detection of nuclear materials  

SciTech Connect (OSTI)

Detection of smuggled nuclear materials at transit points requires monitoring unknown samples in large closed packages. This review contends that high-confidence nuclear-material detection requires induced fission as the primary mechanism, with passive radiation screening in a complementary role. With the right equipment, even small quantities of nuclear materials are detectable with a high probability at transit points. The equipment could also be linked synergistically with detectors of other contrabond. For screening postal mail and packages, passive monitors are probably more cost-effective. When a suspicious item is detected, a single active probe could then be used. Until active systems become mass produced, this two-stage screening/interrogation role for active/passive equipment is more economic for cargo at border crossings. For widespread monitoring of nuclear smuggling, it will probably be necessary to develop a system for simultaneously detecting most categories of contraband, including explosives and illicit drugs. With control of nuclear materials at known storage sites being the first line of defense, detection capabilities at international borders could establish a viable second line of defense against smuggling.

DeVolpi, A.

1996-03-30T23:59:59.000Z

87

Leak detection, monitoring, and mitigation technology trade study update  

SciTech Connect (OSTI)

This document is a revision and update to the initial report that describes various leak detection, monitoring, and mitigation (LDMM) technologies that can be used to support the retrieval of waste from the single-shell tanks (SST) at the Hanford Site. This revision focuses on the improvements in the technical performance of previously identified and useful technologies, and it introduces new technologies that might prove to be useful.

HERTZEL, J.S.

1998-11-10T23:59:59.000Z

88

A novel micro-Raman technique to detect and characterize 4H-SiC stacking faults  

SciTech Connect (OSTI)

A novel Micro-Raman technique was designed and used to detect extended defects in 4H-SiC homoepitaxy. The technique uses above band-gap high-power laser densities to induce a local increase of free carriers in undoped epitaxies (n?faults; the obtained morphologies were found to be in excellent agreement with those provided by standard photoluminescence techniques. The results show that the detection of defects via i-LOPC spectroscopy is totally independent from the stacking fault photoluminescence signals that cover a large energy range up to 0.7?eV, thus allowing for a single-scan simultaneous determination of any kind of stacking fault. Combining the i-LOPC method with the analysis of the transverse optical mode, the micro-Raman characterization can determine the most important properties of unintentionally doped film, including the stress status of the wafer, lattice impurities (point defects, polytype inclusions) and a detailed analysis of crystallographic defects, with a high spectral and spatial resolution.

Piluso, N., E-mail: nicolo.piluso@imm.cnr.it; Camarda, M.; La Via, F. [IMM-CNR, stradale primo sole, 50, 95121 Catania (Italy)

2014-10-28T23:59:59.000Z

89

Field testing of component-level model-based fault detection methods for mixing boxes and VAV fan systems  

SciTech Connect (OSTI)

An automated fault detection and diagnosis tool for HVAC systems is being developed, based on an integrated, life-cycle, approach to commissioning and performance monitoring. The tool uses component-level HVAC equipment models implemented in the SPARK equation-based simulation environment. The models are configured using design information and component manufacturers' data and then fine-tuned to match the actual performance of the equipment by using data measured during functional tests of the sort using in commissioning. This paper presents the results of field tests of mixing box and VAV fan system models in an experimental facility and a commercial office building. The models were found to be capable of representing the performance of correctly operating mixing box and VAV fan systems and detecting several types of incorrect operation.

Xu, Peng; Haves, Philip

2002-05-16T23:59:59.000Z

90

An adaptive algorithm for the detection of high impedance faults on power distribution systems  

E-Print Network [OSTI]

heterogeneous level 2 events. The class of such an event probably could not be clearly determined, but due to the persistence of most faults, the next event would be homogeneous. TRL2 1. Initialize: p;, C(p;), n? i = 1, . . . , Nr are given, qp = p = 0... OF LITERATURE III TRAINING ALGORITHMS 12 A. Overview . B. Level 1 Training Algorithm (TRL1) C. Level 2 Training Algorithm (TRL2) IV ONLINE ALGORITHM 12 13 18 21 A. Extensions to TRL2 B. ONLINE algorithm V IMPLEMENTATION AND RESULTS 21 24 27 VI A...

McCall, Kurt Eric

1990-01-01T23:59:59.000Z

91

Low Cost Arc Fault Detection and Protection for PV Systems: January 30, 2012 - September 30, 2013  

SciTech Connect (OSTI)

Final report for Tigo Energy Incubator project. The specific objective of this 18-month research effort was to develop an off-the-shelf arc-fault detector. The starting point of the project was a prototype detector that was constructed using discrete components and laboratory equipment. An intermediate objective was to build a technically viable detector using programmable components in the detector circuitry. The final objective was to build a commercially viable detector by reducing the cost of the circuitry through the use of more sophisticated programmable components and higher levels of integration.

McCalmont, S.

2013-10-01T23:59:59.000Z

92

Transition-fault test generation  

E-Print Network [OSTI]

. One way to detect these timing defects is to apply test patterns to the integrated circuit that are generated using the transition-fault model. Unfortunately, industry's current transition-fault test generation schemes produce test sets that are too...

Cobb, Bradley Douglas

2013-02-22T23:59:59.000Z

93

Detection and diagnosis of faults and energy monitoring of HVAC systems with least-intrusive power analysis  

E-Print Network [OSTI]

Faults indicate degradation or sudden failure of equipment in a system. Widely existing in heating, ventilating, and air conditioning (HVAC) systems, faults always lead to inefficient energy consumption, undesirable indoor ...

Luo, Dong, 1966-

2001-01-01T23:59:59.000Z

94

Limitations for detecting small-scale faults using the coherency analysis of seismic data  

E-Print Network [OSTI]

Coherency analyzes the trace to trace amplitude similarities recorded by seismic waves. Coherency algorithms have been used to identify the structural or stratigraphic features of an area but the limitations for detecting small-scale features...

Barnett, David Benjamin

2006-08-16T23:59:59.000Z

95

In-situ fault detection apparatus and method for an encased energy storing device  

DOE Patents [OSTI]

An apparatus and method for detecting a breach in an electrically insulating surface of an electrically conductive power system enclosure within which a number of series connected energy storing devices are disposed. The energy storing devices disposed in the enclosure are connected to a series power connection. A detector is coupled to the series connection and detects a change of state in a test signal derived from the series connected energy storing devices. The detector detects a breach in the insulating layer of the enclosure by detecting a state change in the test signal from a nominal state to a non-nominal state. A voltage detector detects a state change of the test signals from a nominal state, represented by a voltage of a selected end energy storing device, to a non-nominal state, represented by a voltage that substantially exceeds the voltage of the selected opposing end energy storing device. Alternatively, the detector may comprise a signal generator that produces the test signal as a time-varying or modulated test signal and injects the test signal into the series connection. The detector detects the state change of the time-varying or modulated test signal from a nominal state, represented by a signal substantially equivalent to the test signal, to a non-nominal state, representative by an absence of the test signal.

Hagen, Ronald A. (Stillwater, MN); Comte, Christophe (Montreal, CA); Knudson, Orlin B. (Vadnais Heights, MN); Rosenthal, Brian (Stillwater, MN); Rouillard, Jean (Saint-Luc, CA)

2000-01-01T23:59:59.000Z

96

Ground-based Nuclear Detonation Detection (GNDD) Technology Roadmap  

SciTech Connect (OSTI)

This GNDD Technology Roadmap is intended to provide guidance to potential researchers and help management define research priorities to achieve technology advancements for ground-based nuclear explosion monitoring science being pursued by the Ground-based Nuclear Detonation Detection (GNDD) Team within the Office of Nuclear Detonation Detection in the National Nuclear Security Administration (NNSA) of the U.S. Department of Energy (DOE). Four science-based elements were selected to encompass the entire scope of nuclear monitoring research and development (R&D) necessary to facilitate breakthrough scientific results, as well as deliver impactful products. Promising future R&D is delineated including dual use associated with the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Important research themes as well as associated metrics are identified along with a progression of accomplishments, represented by a selected bibliography, that are precursors to major improvements to nuclear explosion monitoring.

Casey, Leslie A.

2014-01-13T23:59:59.000Z

97

Developments in Nanosecond Pulse Detection Methods and Technology  

E-Print Network [OSTI]

A promising method for the detection of UHE neutrinos is the Lunar Cherenkov technique, which utilises Earth-based radio telescopes to detect the coherent Cherenkov radiation emitted when a UHE neutrino interacts in the outer layers of the Moon. The LUNASKA project aims to overcome the technological limitations of past experiments to utilise the next generation of radio telescopes in the search for these elusive particles. To take advantage of broad-bandwidth data from potentially thousands of antennas requires advances in signal processing technology. Here we describe recent developments in this field and their application in the search for UHE neutrinos, from a preliminary experiment using the first stage of an upgrade to the Australia Telescope Compact Array, to possibilities for fully utilising the completed Square Kilometre Array. We also explore a new real time technique for characterising ionospheric pulse dispersion which specifically measures ionospheric electron content that is line of sight to the moon.

R. A. McFadden; N. D. R. Bhat; R. D. Ekers; C. W. James; D. Jones; S. J. Tingay; P. P. Roberts; C. J. Phillips; R. J. Protheroe

2008-01-22T23:59:59.000Z

98

ANALYTICAL REDUNDANCY FOR SYSTEMS WITH UNKNOWN INPUTS -APPLICATION TO FAULTS DETECTION  

E-Print Network [OSTI]

-00144067,version1-29Mar2014 Author manuscript, published in "Control Theory and Advanced Technology 9, 3 the inconsistency between the actual plant variables and the mathematical model. They are computed from the plant observations and with the model of this plant ; they are ideally zero but become non-zero if the actual system

Boyer, Edmond

99

Optimization of Fault Detection/Diagnosis Model for Thermal Storage System Using AIC  

E-Print Network [OSTI]

of the event. In addition, human learning, recognition, and optimal judgment process of any event can be simulated by optimizing the most effective pa-rameters and their numbers for detection and diagnosis by the use of variable selection method. In previous...

Pan, S.; Zheng, M.; Nakahara, N.

2006-01-01T23:59:59.000Z

100

Detection Technologies, Arms control and nonproliferation technologies. Third/fourth quarters 1993  

SciTech Connect (OSTI)

This issue of Arms Control and Nonproliferation Technologies is another in a series of issues about specific means for detecting and identifying proliferation and other suspect activities outside the realm of arms control treaties. All the projects discussed are funded by the Office of Research and Development of the Department of Energy`s Office of Nonproliferation and National Security.

Staehle, G; Stull, S; Talaber, C; Moulthrop, P [eds.

1993-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

REMOTE DETECTION OF RADIOACTIVE PLUMES USING MILLIMETER WAVE TECHNOLOGY  

SciTech Connect (OSTI)

The reprocessing of spent nuclear fuel, a common method for manufacturing weapons-grade special nuclear materials, is accompanied by the release of fi ssion products trapped within the fuel. One of these fi ssion products is a radioactive isotope of Krypton (Kr-85); a pure ?- emitter with a half-life of 10.72 years. Due to its chemical neutrality and relatively long half life, nearly all of the Kr-85 is released into the surrounding air during reprocessing, resulting in a concentration of Kr-85 near the source that is several orders of magnitude higher than the typical background (atmospheric) concentrations. This high concentration of Kr-85 is accompanied by a proportionately high increase in air ionization due to the release of beta radiation from Kr-85 decay. Millimeter wave (MMW) sensing technology can be used to detect the presence of Kr-85 induced plumes since a high concentration of ions in the air increases the radar cross section due to a combination of atmospheric phenomena. Possible applications for this technology include the remote sensing of reprocessing activities across national borders bolstering global anti-proliferation initiatives. The feasibility of using MMW radar technology to uniquely detect the presence of Kr-85 can be tested using commercial ion generators or sealed radioactive sources in the laboratory. In this paper we describe our work to derive an ion dispersion model that will describe the spatial distribution of ions from Kr-85 and other common lab sources. The types and energies of radiation emitted by isotopes Co-60 and Cs-137 were researched, and these parameters were incorporated into these dispersion models. Our results can be compared with the results of MMW detection experiments in order to quantify the relationship between radar cross section and air ionization as well as to further calibrate the MMW detection equipment.

Barnowski, R.; Chien; H.; Gopalsami, N.

2009-01-01T23:59:59.000Z

102

Bisectional fault detection system  

DOE Patents [OSTI]

An apparatus, program product and method logically divide a group of nodes and causes node pairs comprising a node from each section to communicate. Results from the communications may be analyzed to determine performance characteristics, such as bandwidth and proper connectivity.

Archer, Charles Jens (Rochester, MN); Pinnow, Kurt Walter (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian Edward (Rochester, MN)

2012-02-14T23:59:59.000Z

103

Webinar: America's Next Top Energy Innovator Runner-Up Presents Hydrogen Detection Technologies  

Broader source: Energy.gov [DOE]

Video recording and text version of the webinar, "America's Next Top Energy Innovator Runner-Up Presents Hydrogen Detection Technologies," originally presented on April 3, 2012.

104

Tracking Honey Bees Using LIDAR (Light Detection and Ranging) Technology  

SciTech Connect (OSTI)

The Defense Advanced Research Projects Agency (DARPA) has recognized that biological and chemical toxins are a real and growing threat to troops, civilians, and the ecosystem. The Explosives Components Facility at Sandia National Laboratories (SNL) has been working with the University of Montana, the Southwest Research Institute, and other agencies to evaluate the feasibility of directing honeybees to specific targets, and for environmental sampling of biological and chemical ''agents of harm''. Recent work has focused on finding and locating buried landmines and unexploded ordnance (UXO). Tests have demonstrated that honeybees can be trained to efficiently and accurately locate explosive signatures in the environment. However, it is difficult to visually track the bees and determine precisely where the targets are located. Video equipment is not practical due to its limited resolution and range. In addition, it is often unsafe to install such equipment in a field. A technology is needed to provide investigators with the standoff capability to track bees and accurately map the location of the suspected targets. This report documents Light Detection and Ranging (LIDAR) tests that were performed by SNL. These tests have shown that a LIDAR system can be used to track honeybees. The LIDAR system can provide both the range and coordinates of the target so that the location of buried munitions can be accurately mapped for subsequent removal.

BENDER, SUSAN FAE ANN; RODACY, PHILIP J.; SCHMITT, RANDAL L.; HARGIS JR., PHILIP J.; JOHNSON, MARK S.; KLARKOWSKI, JAMES R.; MAGEE, GLEN I.; BENDER, GARY LEE

2003-01-01T23:59:59.000Z

105

Neural Network-Based Classification of Single-Phase Distribution Transformer Fault Data  

E-Print Network [OSTI]

The ultimate goal of this research is to develop an online, non-destructive, incipient fault detection system that is able to detect incipient faults in transformers and other electric equipment before the faults become catastrophic...

Zhang, Xujia

2006-08-16T23:59:59.000Z

106

Runtime Fault Detection and Localization in Component-oriented Software Bernhard Peischl and Joerg Weber and Franz Wotawa  

E-Print Network [OSTI]

and Joerg Weber and Franz Wotawa Technische Universit¨at Graz Institute for Software Technology 8010 Graz

107

Detecting Fractures Using Technology at High Temperatures and...  

Broader source: Energy.gov (indexed) [DOE]

Fractures Using Technology at High Temperatures and Depths - Geothermal Ultrasonic Fracture Imager (GUFI) Presentation Number: 015 Investigator: Patterson, Doug (Baker Hughes...

108

Single molecule detection using charge-coupled device array technology  

SciTech Connect (OSTI)

A technique for the detection of single fluorescent chromophores in a flowing stream is under development. This capability is an integral facet of a rapid DNA sequencing scheme currently being developed by Los Alamos National Laboratory. In previous investigations, the detection sensitivity was limited by the background Raman emission from the water solvent. A detection scheme based on a novel mode of operating a Charge-Coupled Device (CCD) is being developed which should greatly enhance the discrimination between fluorescence from a single molecule and the background Raman scattering from the solvent. Register shifts between rows in the CCD are synchronized with the sample flow velocity so that fluorescence from a single molecule is collected in a single moving charge packet occupying an area approaching that of a single pixel while the background is spread evenly among a large number of pixels. Feasibility calculations indicate that single molecule detection should be achieved with an excellent signal-to-noise ratio.

Denton, M.B.

1992-07-29T23:59:59.000Z

109

Coordinated Fault-Tolerance for High-Performance Computing Final Project Report  

SciTech Connect (OSTI)

With the Coordinated Infrastructure for Fault Tolerance Systems (CIFTS, as the original project came to be called) project, our aim has been to understand and tackle the following broad research questions, the answers to which will help the HEC community analyze and shape the direction of research in the field of fault tolerance and resiliency on future high-end leadership systems. #15; Will availability of global fault information, obtained by fault information exchange between the different HEC software on a system, allow individual system software to better detect, diagnose, and adaptively respond to faults? If fault-awareness is raised throughout the system through fault information exchange, is it possible to get all system software working together to provide a more comprehensive end-to-end fault management on the system? #15; What are the missing fault-tolerance features that widely used HEC system software lacks today that would inhibit such software from taking advantage of systemwide global fault information? #15; What are the practical limitations of a systemwide approach for end-to-end fault management based on fault awareness and coordination? #15; What mechanisms, tools, and technologies are needed to bring about fault awareness and coordination of responses on a leadership-class system? #15; What standards, outreach, and community interaction are needed for adoption of the concept of fault awareness and coordination for fault management on future systems? Keeping our overall objectives in mind, the CIFTS team has taken a parallel fourfold approach. #15; Our central goal was to design and implement a light-weight, scalable infrastructure with a simple, standardized interface to allow communication of fault-related information through the system and facilitate coordinated responses. This work led to the development of the Fault Tolerance Backplane (FTB) publish-subscribe API specification, together with a reference implementation and several experimental implementations on top of existing publish-subscribe tools. #15; We enhanced the intrinsic fault tolerance capabilities representative implementations of a variety of key HPC software subsystems and integrated them with the FTB. Targeting software subsystems included: MPI communication libraries, checkpoint/restart libraries, resource managers and job schedulers, and system monitoring tools. #15; Leveraging the aforementioned infrastructure, as well as developing and utilizing additional tools, we have examined issues associated with expanded, end-to-end fault response from both system and application viewpoints. From the standpoint of system operations, we have investigated log and root cause analysis, anomaly detection and fault prediction, and generalized notification mechanisms. Our applications work has included libraries for fault-tolerance linear algebra, application frameworks for coupled multiphysics applications, and external frameworks to support the monitoring and response for general applications. #15; Our final goal was to engage the high-end computing community to increase awareness of tools and issues around coordinated end-to-end fault management.

Panda, Dhabaleswar Kumar [The Ohio State University; Beckman, Pete

2011-07-01T23:59:59.000Z

110

Robust model-based fault diagnosis for chemical process systems  

E-Print Network [OSTI]

diagnosis systems, which use limited information about the process model to robustly detect, discriminate, and reconstruct instrumentation faults. Broadly, the proposed method consists of a novel nonlinear state and parameter estimator coupled with a fault...

Rajaraman, Srinivasan

2006-08-16T23:59:59.000Z

111

Sensor Fault Diagnosis Using Principal Component Analysis  

E-Print Network [OSTI]

The purpose of this research is to address the problem of fault diagnosis of sensors which measure a set of direct redundant variables. This study proposes: 1. A method for linear senor fault diagnosis 2. An analysis of isolability and detectability...

Sharifi, Mahmoudreza

2010-07-14T23:59:59.000Z

112

Assessment of NDE Technologies for Detection and Characterization of Stress Corrosion Cracking in LWRs  

SciTech Connect (OSTI)

Stress corrosion cracking (SCC) in light water reactors (LWRs) has been a persistent form of degradation in the nuclear industry. Examples of SCC can be found for a range of materials in boiling and pressurized water reactor environments, including carbon steels, stainless steels, and nickel-base stainless alloys. The evolution of SCC is often characterized by a long initiation stage followed by a phase of more rapid crack growth to failure. This provides a relatively short window of opportunity to detect the start of observable SCC, and it is conceivable that SCC could progress from initiation to failure between subsequent examinations when managed by applying periodic in-service inspection techniques. Implementation of advanced aging management paradigms in the current fleet of LWRs will require adaptation of existing measurement technologies and development of new technologies to perform on-line measurements during reactor operation to ensure timely detection of material degradation and to support the implementation of advanced diagnostics and prognostics. This paper considers several non-destructive examination (NDE) technologies with known sensitivity to detection of indicators for SCC initiation and/or propagation, and assesses these technologies with respect to their ability to detect and accurately characterize the significance of an SCC flaw. Potential strategies to improve SCC inspection or monitoring performance are offered to benefit management of SCC degradation in LWRs.

Meyer, Ryan M.; Ramuhalli, Pradeep; Toloczko, Mychailo B.; Bond, Leonard J.; Montgomery, Robert O.

2012-12-31T23:59:59.000Z

113

Preliminary photovoltaic arc-fault prognostic tests using sacrificial fiber optic cabling.  

SciTech Connect (OSTI)

Through the New Mexico Small Business Assistance Program, Sandia National Laboratories worked with Sentient Business Systems, Inc. to develop and test a novel photovoltaic (PV) arc-fault detection system. The system operates by pairing translucent polymeric fiber optic sensors with electrical circuitry so that any external abrasion to the system or internal heating causes the fiber optic connection to fail or detectably degrade. A periodic pulse of light is sent through the optical path using a transmitter-receiver pair. If the receiver does not detect the pulse, an alarm is sounded and the PV system can be de-energized. This technology has the unique ability to prognostically determine impending failures to the electrical system in two ways: (a) the optical connection is severed prior to physical abrasion or cutting of PV DC electrical conductors, and (b) the polymeric fiber optic cable melts via Joule heating before an arc-fault is established through corrosion. Three arc-faults were created in different configurations found in PV systems with the integrated fiber optic system to determine the feasibility of the technology. In each case, the fiber optic cable was broken and the system annunciated the fault.

Johnson, Jay; Blemel, Kenneth D. [Sentient Business Systems, Inc., Albuquerque, NM; Peter, Francis [Sentient Business Systems, Inc., Albuquerque, NM

2013-02-01T23:59:59.000Z

114

Low background high efficiency radiocesium detection system based on positron emission tomography technology  

SciTech Connect (OSTI)

After the 2011 nuclear power plant accident at Fukushima, radiocesium contamination in food became a serious concern in Japan. However, low background and high efficiency radiocesium detectors are expensive and huge, including semiconductor germanium detectors. To solve this problem, we developed a radiocesium detector by employing positron emission tomography (PET) technology. Because {sup 134}Cs emits two gamma photons (795 and 605 keV) within 5 ps, they can selectively be measured with coincidence. Such major environmental gamma photons as {sup 40}K (1.46 MeV) are single photon emitters and a coincidence measurement reduces the detection limit of radiocesium detectors. We arranged eight sets of Bi{sub 4}Ge{sub 3}O{sub 12} (BGO) scintillation detectors in double rings (four for each ring) and measured the coincidence between these detectors using PET data acquisition system. A 50 × 50 × 30 mm BGO was optically coupled to a 2 in. square photomultiplier tube (PMT). By measuring the coincidence, we eliminated most single gamma photons from the energy distribution and only detected those from {sup 134}Cs at an average efficiency of 12%. The minimum detectable concentration of the system for the 100 s acquisition time is less than half of the food monitor requirements in Japan (25 Bq/kg). These results show that the developed radiocesium detector based on PET technology is promising to detect low level radiocesium.

Yamamoto, Seiichi; Ogata, Yoshimune [Department of Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya 461-8673 (Japan)] [Department of Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya 461-8673 (Japan)

2013-09-15T23:59:59.000Z

115

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November, 1998 An Empirical Study of the Effects of Minimization on the Fault Detection  

E-Print Network [OSTI]

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November Columbus, OH hongc@cis.ohio-state.edu Abstract Test suite minimization techniques attempt to reduce reduce the ability of that test suite to reveal faults in the software. A recent study showed

Rothermel, Gregg

116

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November, 1998 An Empirical Study of the Effects of Minimization on the Fault Detection  

E-Print Network [OSTI]

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November Columbus, OH hongc@cis.ohio­state.edu Abstract Test suite minimization techniques attempt to reduce reduce the ability of that test suite to reveal faults in the software. A recent study showed

Rothermel, Gregg

117

In:Safeprocess'09, 7th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes, Barcelona, 2009. ISBN: 978-3-902661-46-3  

E-Print Network [OSTI]

Processes, Barcelona, 2009. ISBN: 978-3-902661-46-3 Post-mortem Diagnosis of Bottling Plants Based-based system that performs post-mortem fault localization of food packaging plants and, more specifically, bottling plants based on recorded data. In this project, we need to cope with non-negligible transportation

Cengarle, MarĂ­a Victoria

118

Environmental sensor technologies and procedures for detecting and identifying indoor air pollution. Final report  

SciTech Connect (OSTI)

Public concern about environmental quality now encompasses the indoor environment-the buildings where people work and live. In recent years researchers have been discovering new links between indoor air quality (IAQ) and the occupants' comfort, health, and productivity. As the operator of many thousands of buildings, and the employer of the millions of people who use those buildings, the U.S. Army has a strong interest in maintaining and promoting good IAQ. This report presents a concise summary of the key IAQ parameters of interest to building managers, the most common indoor air contaminants, the variety of sensor technology currently available for detect and identifying those contaminants, and basic procedures for using that technology.

O'Connor, E.T.; Kermath, D.; Kemme, M.R.

1992-03-01T23:59:59.000Z

119

Automated transmission line fault analysis using synchronized sampling at two ends  

SciTech Connect (OSTI)

This paper introduces a new approach to fault analysis using synchronized sampling. A digital fault recorder with Global Positioning System (GPS) satellite receiver is the source of data for this approach. Fault analysis functions, such as fault detection, classification and location are implemented for a transmission line using synchronized samples from two ends of a line. This technique can be extremely fast, selective and accurate, providing fault analysis performance that can not easily be matched by other known techniques.

Kezunovic, M. [Texas A and M Univ., College Station, TX (United States)] [Texas A and M Univ., College Station, TX (United States); Perunicic, B. [Lamar Univ., Beaumont, TX (United States)] [Lamar Univ., Beaumont, TX (United States)

1996-02-01T23:59:59.000Z

120

Automated transmission line fault analysis using synchronized sampling at two ends  

SciTech Connect (OSTI)

This paper introduces a new approach to fault analysis using synchronized sampling. A digital fault recorder with Global Positioning System (GPS) satellite receiver is the source of data for this approach. Fault analysis functions, such as fault detection, classification and location are implemented for a transmission line using synchronized samples from two ends of a line. This technique can be extremely fast, selective and accurate, providing fault analysis performance that can not easily be matched by other known techniques.

Kezunovic, M. [Texas A and M Univ., College Station, TX (United States); Perunicic, B. [Lamar Univ., Beaumont, TX (United States)

1995-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Patent analysis, detection of new markets for employment Example of technologies related to the aging of population  

E-Print Network [OSTI]

1 Patent analysis, detection of new markets for employment Example of technologies related normes : complémentarités et conflits, Tours : France (2013)" #12;2 Patent analysis, detection of new Patent Analysis). The world patent database from the EPO (the European Patent Office), covers more than

Paris-Sud XI, Université de

122

Analysis of electrical signatures in synchronous generators characterized by bearing faults  

E-Print Network [OSTI]

Synchronous generators play a vital role in power systems. One of the major mechanical faults in synchronous generators is related to bearings. The popular vibration analysis method has been utilized to detect bearing faults for years. However...

Choi, Jae-Won

2009-05-15T23:59:59.000Z

123

Automatic Fault Characterization via Abnormality-Enhanced Classification  

SciTech Connect (OSTI)

Enterprise and high-performance computing systems are growing extremely large and complex, employing hundreds to hundreds of thousands of processors and software/hardware stacks built by many people across many organizations. As the growing scale of these machines increases the frequency of faults, system complexity makes these faults difficult to detect and to diagnose. Current system management techniques, which focus primarily on efficient data access and query mechanisms, require system administrators to examine the behavior of various system services manually. Growing system complexity is making this manual process unmanageable: administrators require more effective management tools that can detect faults and help to identify their root causes. System administrators need timely notification when a fault is manifested that includes the type of fault, the time period in which it occurred and the processor on which it originated. Statistical modeling approaches can accurately characterize system behavior. However, the complex effects of system faults make these tools difficult to apply effectively. This paper investigates the application of classification and clustering algorithms to fault detection and characterization. We show experimentally that naively applying these methods achieves poor accuracy. Further, we design novel techniques that combine classification algorithms with information on the abnormality of application behavior to improve detection and characterization accuracy. Our experiments demonstrate that these techniques can detect and characterize faults with 65% accuracy, compared to just 5% accuracy for naive approaches.

Bronevetsky, G; Laguna, I; de Supinski, B R

2010-12-20T23:59:59.000Z

124

Fuzzy Pattern Recognition Based Fault Diagnosis Rafik Bensaadi1  

E-Print Network [OSTI]

Fuzzy Pattern Recognition Based Fault Diagnosis Rafik Bensaadi1 , LeĂŻla H. Mouss1 , Mohamed D in this paper the design of a Fuzzy Pattern Recognition System (FPRS) that solves, in real time, the main. Keywords: Diagnosis, fault detection, pattern recognition, fuzzy control, conjugate gradients, complex

Boyer, Edmond

125

Detection and location of leaks in district heating steam systems: Survey and review of current technology and practices  

SciTech Connect (OSTI)

This report presents the results of a survey undertaken to identify and characterize current practices for detecting and locating leaks in district heating systems, particular steam systems. Currently used technology and practices are reviewed. In addition, the survey was used to gather information that may be important for the application of acoustic leak detection. A few examples of attempts to locate leaks in steam and hot water pipes by correlation of acoustic signals generated by the leaks are also discussed.

Kupperman, D.S.; Raptis, A.C.; Lanham, R.N.

1992-03-01T23:59:59.000Z

126

VCSEL fault location apparatus and method  

DOE Patents [OSTI]

An apparatus for locating a fault within an optical fiber is disclosed. The apparatus, which can be formed as a part of a fiber-optic transmitter or as a stand-alone instrument, utilizes a vertical-cavity surface-emitting laser (VCSEL) to generate a test pulse of light which is coupled into an optical fiber under test. The VCSEL is subsequently reconfigured by changing a bias voltage thereto and is used as a resonant-cavity photodetector (RCPD) to detect a portion of the test light pulse which is reflected or scattered from any fault within the optical fiber. A time interval .DELTA.t between an instant in time when the test light pulse is generated and the time the reflected or scattered portion is detected can then be used to determine the location of the fault within the optical fiber.

Keeler, Gordon A. (Albuquerque, NM); Serkland, Darwin K. (Albuquerque, NM)

2007-05-15T23:59:59.000Z

127

RELIABILITY ANALYSIS IN A FAULT TOLERANT CONTROL STRATEGY DEDICATED TO ACTIVE POWER FILTER  

E-Print Network [OSTI]

RELIABILITY ANALYSIS IN A FAULT TOLERANT CONTROL STRATEGY DEDICATED TO ACTIVE POWER FILTER P. WEBER on reliability analysis dedicated to an active power filter. Once a fault has been detected and isolated, all reliability indicate the optimal structure. Keywords: Fault Tolerant Control, System Reliability, Active power

Paris-Sud XI, Université de

128

EECS 578 Project Proposal Design of Fault-Tolerant Digital Microfluidics-based  

E-Print Network [OSTI]

Microfluidics-based biochips are microsystems that integrate several repetitive laboratory procedures onto a single chip. The architecture of the device is based on a twodimensional array of electrodes (unit cells) that are used to manipulate discrete droplets, which are typically in nanoliter volumes. These miniscule biochips, usually in the range of square millimetres, have enabled on-chip immunoassays, DNA analysis, environmental toxicity monitoring, and many other fields in molecular biology [1]. Microfluidics technology offers many advantages over traditional laboratory methods, which include reduced volume consumption of fluids, faster processing speed, and lower costs due to the ability for mass production [1]. Since microfluidics-based biochips are often used in safety-critical applications, reliability is one of the most important design metrics [1]. In order to recover from erroneous operations, these devices need to be designed for fault-tolerance. Moreover, as the complexity of microfluidics-based lab-on-chip increases, defect density is expected to increase. As a result, efficient runtime recovery techniques are necessary. Designing fault-tolerant biochips requires two steps: fault detection and fault recovery.

Yu-chih Chen; Win San Khwa; Ming Han; Victor Yu

129

FPGA Interconnect Delay Fault Testing Erik Chmelar  

E-Print Network [OSTI]

A satisfactory FPGA testing method meets several crite- ria. First, the routing resources must be explicitlyFPGA Interconnect Delay Fault Testing Erik Chmelar Center for Reliable Computing Stanford is a scalable manufactur- ing test method for all SRAM-based FPGAs, able to detect multiple interconnect delay

Stanford University

130

The application of satellite time references to HVDC fault location  

SciTech Connect (OSTI)

An HVdc fault location scheme is described which relies on very precise detection of the time of arrival of fault created surges at both ends of the line. Such detection is achieved by a very accurate data acquisition and processing system combined with the time reference signals provided by a global positioning system receiver. Extensive digital simulation is carried out to determine the voltage and current waveforms, to identify the main sources of error and suggest possible compensation techniques.

Dewe, M.B.; Sankar, S.; Arrillaga, J. (Univ. of Canterbury, Christchurch (New Zealand))

1993-07-01T23:59:59.000Z

131

Science & Technology Review June 2012  

SciTech Connect (OSTI)

This month's issue has the following articles: (1) A New Era in Climate System Analysis - Commentary by William H. Goldstein; (2) Seeking Clues to Climate Change - By comparing past climate records with results from computer simulations, Livermore scientists can better understand why Earth's climate has changed and how it might change in the future; (3) Finding and Fixing a Supercomputer's Faults - Livermore experts have developed innovative methods to detect hardware faults in supercomputers and help applications recover from errors that do occur; (4) Targeting Ignition - Enhancements to the cryogenic targets for National Ignition Facility experiments are furthering work to achieve fusion ignition with energy gain; (5) Neural Implants Come of Age - A new generation of fully implantable, biocompatible neural prosthetics offers hope to patients with neurological impairment; and (6) Incubator Busy Growing Energy Technologies - Six collaborations with industrial partners are using the Laboratory's high-performance computing resources to find solutions to urgent energy-related problems.

Poyneer, L A

2012-04-20T23:59:59.000Z

132

Optimizing Test Pattern Generation Using Top-Off ATPG Methodology for Stuck–AT, Transition and Small Delay Defect Faults  

E-Print Network [OSTI]

................................................................................................................ 8 3.2 AC Scan ................................................................................................................ 9 3.3 AC Scan For Transition Faults - Shortcomings For SDD Detection ................. 12 4. TOP-OFF ATPG... .......................................................................................... 28 5.6 Fortuitous Detections in 1-Detect Transition Pattern Set ................................... 28 5.7 SDD Coverage Of Faults Based On Detections ................................................. 29 6. CONCLUSIONS AND FUTURE WORK...

Gill, Arjun

2013-05-01T23:59:59.000Z

133

Fault Locating, Prediction and Protection (FLPPS)  

SciTech Connect (OSTI)

One of the main objectives of this DOE-sponsored project was to reduce customer outage time. Fault location, prediction, and protection are the most important aspects of fault management for the reduction of outage time. In the past most of the research and development on power system faults in these areas has focused on transmission systems, and it is not until recently with deregulation and competition that research on power system faults has begun to focus on the unique aspects of distribution systems. This project was planned with three Phases, approximately one year per phase. The first phase of the project involved an assessment of the state-of-the-art in fault location, prediction, and detection as well as the design, lab testing, and field installation of the advanced protection system on the SCE Circuit of the Future located north of San Bernardino, CA. The new feeder automation scheme, with vacuum fault interrupters, will limit the number of customers affected by the fault. Depending on the fault location, the substation breaker might not even trip. Through the use of fast communications (fiber) the fault locations can be determined and the proper fault interrupting switches opened automatically. With knowledge of circuit loadings at the time of the fault, ties to other circuits can be closed automatically to restore all customers except the faulted section. This new automation scheme limits outage time and increases reliability for customers. The second phase of the project involved the selection, modeling, testing and installation of a fault current limiter on the Circuit of the Future. While this project did not pay for the installation and testing of the fault current limiter, it did perform the evaluation of the fault current limiter and its impacts on the protection system of the Circuit of the Future. After investigation of several fault current limiters, the Zenergy superconducting, saturable core fault current limiter was selected for installation. Because of some testing problems with the Zenergy fault current limiter, installation was delayed until early 2009 with it being put into operation on March 6, 2009. A malfunction of the FCL controller caused the DC power supply to the superconducting magnet to be turned off. This inserted the FCL impedance into the circuit while it was in normal operation causing a voltage resonance condition. While these voltages never reached a point where damage would occur on customer equipment, steps were taken to insure this would not happen again. The FCL was reenergized with load on December 18, 2009. A fault was experienced on the circuit with the FCL in operation on January 14, 2010. The FCL operated properly and reduced the fault current by about 8%, what was expected from tests and modeling. As of the end of the project, the FCL was still in operation on the circuit. The third phase of the project involved the exploration of several advanced protection ideas that might be at a state where they could be applied to the Circuit of the Future and elsewhere in the SCE electrical system. Based on the work done as part of the literature review and survey, as well as a number of internal meetings with engineering staff at SCE, a number of ideas were compiled. These ideas were then evaluated for applicability and ability to be applied on the Circuit of the Future in the time remaining for the project. Some of these basic ideas were implemented on the circuit including measurement of power quality before and after the FCL. It was also decided that we would take what was learned as part of the Circuit of the Future work and extend it to the next generation circuit protection for SCE. Also at this time, SCE put in a proposal to the DOE for the Irvine Smart Grid Demonstration using ARRA funding. SCE was successful in obtaining funding for this proposal, so it was felt that exploration of new protection schemes for this Irvine Smart Grid Demonstration would be a good use of the project resources. With this in mind, a protection system that uses fault interrupting switches, hi

Yinger, Robert, J.; Venkata, S., S.; Centeno, Virgilio

2010-09-30T23:59:59.000Z

134

Optimal fault location  

E-Print Network [OSTI]

for the pre-selected time out to pass and initiate reclosing again. If after selected number of attempts of reclosing, fault is still present, breaker lockout is taking place. There will be no more attempts to reclose automatically the breaker again....2: Trip and reclose sequences on a single breaker In the case of breaker lockout the assumption taken by the operators is that fault is permanent. Special order is issued to the maintenance for the breaker to be closed back in 4 again once...

Knezev, Maja

2009-05-15T23:59:59.000Z

135

Optimal fault location  

E-Print Network [OSTI]

for the pre-selected time out to pass and initiate reclosing again. If after selected number of attempts of reclosing, fault is still present, breaker lockout is taking place. There will be no more attempts to reclose automatically the breaker again....2: Trip and reclose sequences on a single breaker In the case of breaker lockout the assumption taken by the operators is that fault is permanent. Special order is issued to the maintenance for the breaker to be closed back in 4 again once...

Knezev, Maja

2008-10-10T23:59:59.000Z

136

Computer hardware fault administration  

DOE Patents [OSTI]

Computer hardware fault administration carried out in a parallel computer, where the parallel computer includes a plurality of compute nodes. The compute nodes are coupled for data communications by at least two independent data communications networks, where each data communications network includes data communications links connected to the compute nodes. Typical embodiments carry out hardware fault administration by identifying a location of a defective link in the first data communications network of the parallel computer and routing communications data around the defective link through the second data communications network of the parallel computer.

Archer, Charles J. (Rochester, MN); Megerian, Mark G. (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian E. (Rochester, MN)

2010-09-14T23:59:59.000Z

137

Carbon nanotube synthesis and detection : limiting the environmental impact of novel technologies  

E-Print Network [OSTI]

Driven by commercial promise, the carbon nanotube (CNT) industry is growing rapidly, yet little is known about the potential environmental impacts of these novel materials. In particular, there are no methods to detect ...

Plata, Desirée L

2009-01-01T23:59:59.000Z

138

Single molecule detection using charge-coupled device array technology. Technical progress report  

SciTech Connect (OSTI)

A technique for the detection of single fluorescent chromophores in a flowing stream is under development. This capability is an integral facet of a rapid DNA sequencing scheme currently being developed by Los Alamos National Laboratory. In previous investigations, the detection sensitivity was limited by the background Raman emission from the water solvent. A detection scheme based on a novel mode of operating a Charge-Coupled Device (CCD) is being developed which should greatly enhance the discrimination between fluorescence from a single molecule and the background Raman scattering from the solvent. Register shifts between rows in the CCD are synchronized with the sample flow velocity so that fluorescence from a single molecule is collected in a single moving charge packet occupying an area approaching that of a single pixel while the background is spread evenly among a large number of pixels. Feasibility calculations indicate that single molecule detection should be achieved with an excellent signal-to-noise ratio.

Denton, M.B.

1992-07-29T23:59:59.000Z

139

Stuck-at-fault test set compaction  

E-Print Network [OSTI]

. Test set size under pattern score based dynamic compaction . . . 13 . . . 17 Figure 7. Pattern Score distribution v:ith pattern metric dynamic compaction. . . . . . . . . . . . . . I g LIST OF TABLES Page Table l. l. nuit Target Sclcction Methods.... Fault Target Selection Methods Random Minimum Detection Count Circuit Name c432 c499 c880 c1355 c1908 G2670 Excitation Balance 0. 136296 0. 191652 0. 170293 0. 173310 0. 187486 0. 190484 Pattern Count 1152 873 2693 1394 1708 5148...

Vanfickell, Jason Michael

2013-02-22T23:59:59.000Z

140

An algorithm for faulted phase and feeder selection under high impedance fault conditions  

E-Print Network [OSTI]

. Summary SUMMARY AND CONCLUSIONS REFERENCES . SUPPLEMENTAL SOURCES CONSULTED APPENDIX A VITA 57 58 59 59 60 62 68 70 vn LIST OF TABLES Table II. Ihh Comparison of fault-generated phases during arcing fault test Comparison of fault...-generated phases during arcing fault test Comparison of fault-generated phases during arcing fault test activity on activity on activity on faulted and unfaulted Page 45 faulted and unfaulted 46 faulted and unfaulted 47 vu1 LIST OF FIGURES Figure l...

Benner, Carl Lee

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Detection of exposure damage in composite materials using Fourier transform infrared technology.  

SciTech Connect (OSTI)

Goal: to detect the subtle changes in laminate composite structures brought about by thermal, chemical, ultraviolet, and moisture exposure. Compare sensitivity of an array of NDI methods, including Fourier Transform Infrared Spectroscopy (FTIR), to detect subtle differences in composite materials due to deterioration. Inspection methods applied: ultrasonic pulse echo, through transmission ultrasonics, thermography, resonance testing, mechanical impedance analysis, eddy current, low frequency bond testing & FTIR. Comparisons between the NDI methods are being used to establish the potential of FTIR to provide the necessary sensitivity to non-visible, yet significant, damage in the resin and fiber matrix of composite structures. Comparison of NDI results with short beam shear tests are being used to relate NDI sensitivity to reduction in structural performance. Chemical analyses technique, which measures the infrared intensity versus wavelength of light reflected on the surface of a structure (chemical and physical information via this signature). Advances in instrumentation have resulted in hand-held portable devices that allow for field use (few seconds per scan). Shows promise for production quality assurance and in-service applications on composite aircraft structures (scarfed repairs). Statistical analysis on frequency spectrums produced by FTIR interrogations are being used to produce an NDI technique for assessing material integrity. Conclusions are: (1) Use of NDI to assess loss of composite laminate integrity brought about by thermal, chemical, ultraviolet, and moisture exposure. (2) Degradation trends between SBS strength and exposure levels (temperature and time) have been established for different materials. (3) Various NDI methods have been applied to evaluate damage and relate this to loss of integrity - PE UT shows greatest sensitivity. (4) FTIR shows promise for damage detection and calibration to predict structural integrity (short beam shear). (5) Detection of damage for medium exposure levels (possibly resin matrix degradation only) is more difficult and requires additional study. (6) These are initial results only - program is continuing with additional heat, UV, chemical and water exposure test specimens.

Roach, Dennis Patrick; Duvall, Randy L.

2010-09-01T23:59:59.000Z

142

Development of Asset Fault Signatures for Prognostic and Health Management in the Nuclear Industry  

SciTech Connect (OSTI)

Proactive online monitoring in the nuclear industry is being explored using the Electric Power Research Institute’s Fleet-Wide Prognostic and Health Management (FW-PHM) Suite software. The FW-PHM Suite is a set of web-based diagnostic and prognostic tools and databases that serves as an integrated health monitoring architecture. The FW-PHM Suite has four main modules: Diagnostic Advisor, Asset Fault Signature (AFS) Database, Remaining Useful Life Advisor, and Remaining Useful Life Database. This paper focuses on development of asset fault signatures to assess the health status of generator step-up generators and emergency diesel generators in nuclear power plants. Asset fault signatures describe the distinctive features based on technical examinations that can be used to detect a specific fault type. At the most basic level, fault signatures are comprised of an asset type, a fault type, and a set of one or more fault features (symptoms) that are indicative of the specified fault. The AFS Database is populated with asset fault signatures via a content development exercise that is based on the results of intensive technical research and on the knowledge and experience of technical experts. The developed fault signatures capture this knowledge and implement it in a standardized approach, thereby streamlining the diagnostic and prognostic process. This will support the automation of proactive online monitoring techniques in nuclear power plants to diagnose incipient faults, perform proactive maintenance, and estimate the remaining useful life of assets.

Vivek Agarwal; Nancy J. Lybeck; Randall Bickford; Richard Rusaw

2014-06-01T23:59:59.000Z

143

Technology  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmittedStatus TomAboutManusScience and InnovationexperimentsTechnology

144

Fault Tolerant Photodiode and Photogate Active Pixel Sensors , Glenn H. Chapmana  

E-Print Network [OSTI]

Fault Tolerant Photodiode and Photogate Active Pixel Sensors Cory Junga , Glenn H. Chapmana, this design can correct for most defects allowing for higher production yields. Fault tolerant photodiode and photogate APS' were fabricated in 0.18-micron technology. Testing showed that the photodiode APS could

Chapman, Glenn H.

145

Detect  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to UserProduct: CrudeOffice ofINLNuclear262AboutDesignerFile SystemDetect

146

Improved geomembrane damage/leak detection through co-extrusion technology  

SciTech Connect (OSTI)

There has been a considerable advancement in technology available for providing a barrier system in the containment and storage of waste materials. Natural soil liners several feet in thickness have been augmented by factory-produced, synthetic materials that have permeability coefficients several orders of magnitude lower than any natural soil system. To carry the systems approach one step farther, engineers use multiple layers of synthetics separated at times by layers of clay offering a redundant composite barrier to protect the groundwater. Each geosynthetic material offers its own unique contribution to the system based upon its physical characteristics. Co-extrusion -- the process of combining two or more materials into a single product, through a single process -- is now revolutionizing the liner industry.

Messmer, D.P.; Cadwallader, M. (Gundle Lining Systems, Inc., Houston, TX (United States))

1994-04-01T23:59:59.000Z

147

Robust Codes for Fault Attack Resistant Cryptographic Konrad J. Kulikowski, Mark G. Karpovsky, Alexander Taubin  

E-Print Network [OSTI]

Robust Codes for Fault Attack Resistant Cryptographic Hardware Konrad J. Kulikowski, Mark G algorithms are vulner- able to fault analysis attacks. To detect these attacks we propose an architec- ture by an attacker. Architectures based on these codes have fewer undetectable er- rors than linear codes

Karpovsky, Mark

148

Modeling and Measurement Constraints in Fault Diagnostics for HVAC Systems Massieh Najafi1  

E-Print Network [OSTI]

Modeling and Measurement Constraints in Fault Diagnostics for HVAC Systems Massieh Najafi1 , David for determining HVAC diagnostics, methods to detect faults in HVAC systems are still generally undeveloped. Most in a substantial increase in energy use. For example, failure of an HVAC fan may prevent cool air from one

149

Fault Evolution in Photovoltaic Array During Night-to-Day Transition  

E-Print Network [OSTI]

amount of energy loss. For example, in UK domestic PV systems, the annual energy loss due to faults in PV Fault detection and protection in solar photovoltaic (PV) arrays are important tasks for improving PV at night when there is no solar irradiance. During sunrise, the irradiance on the PV array increases slowly

Lehman, Brad

150

Fiber Optic Sensing Technology for Detecting Gas Hydrate Formation and Decomposition  

SciTech Connect (OSTI)

A fiber optic-based distributed sensing system (DSS) has been integrated with a large volume (72 L) pressure vessel providing high spatial resolution, time resolved, 3-D measurement of hybrid temperature-strain (TS) values within experimental sediment gas hydrate systems. Areas of gas hydrate formation (exothermic) and decomposition (endothermic) can be characterized through this proxy by time series analysis of discrete data points collected along the length of optical fibers placed within a sediment system. Data is visualized as a 'movie' of TS values along the length of each fiber over time. Experiments conducted in the Seafloor Processing Simulator (SPS) at Oak Ridge National Laboratory show clear indications of hydrate formation and dissociation events at expected P-T conditions given the thermodynamics of the CH4-H2O system. The high spatial resolution achieved with fiber optic technology makes the DSS a useful tool for visualizing time resolved formation and dissociation of gas hydrates in large-scale sediment experiments.

Rawn, Claudia J [ORNL; Leeman, John R [University of Oklahoma, Norman; Ulrich, Shannon M [ORNL; Alford, Jonathan E [ORNL; Phelps, Tommy Joe [ORNL; Madden, Megan Elwood [University of Oklahoma, Norman

2011-01-01T23:59:59.000Z

151

Fault current limiter  

DOE Patents [OSTI]

A fault current limiter (FCL) includes a series of high permeability posts for collectively define a core for the FCL. A DC coil, for the purposes of saturating a portion of the high permeability posts, surrounds the complete structure outside of an enclosure in the form of a vessel. The vessel contains a dielectric insulation medium. AC coils, for transporting AC current, are wound on insulating formers and electrically interconnected to each other in a manner such that the senses of the magnetic field produced by each AC coil in the corresponding high permeability core are opposing. There are insulation barriers between phases to improve dielectric withstand properties of the dielectric medium.

Darmann, Francis Anthony

2013-10-08T23:59:59.000Z

152

Implementation of a Dual Containment/Surveillance System utilizing scene-change detection and radio frequency technology  

SciTech Connect (OSTI)

This paper will examine the implementation of scene-change detection and radio frequency technology within a Dual Containment/Surveillance (C/S) System. Additionally, this paper will examine the human performance factors in the operation of these systems. Currently, Westinghouse Savannah River Company utilizes the Continuous Item Monitoring and Surveillance System (CIMS) in the performance of Dual C/S to monitor special nuclear materials within International Atomic Energy Agency (IAEA) Safeguards and Domestic Safeguards. CIMS is comprised of the Material Monitoring System (MMS) (R), a multi-media electronic surveillance system developed by Sandia National Laboratory which incorporates the use of active seals commonly called Radio Frequency Tamper Indicating Devices (RFTIDs), NT Vision (R) as developed by Los Alamos National Laboratory, a Microsoft Windows NT (R) based operating system providing for domestic scene-change detection and the Digital Multi-Camera Optical Surveillance System (DMOS) (R) which provides scene-change detection for IAEA. Although this paper will focus on the implementation of Dual C/S utilizing the Continuous Item Monitoring and Surveillance System, the necessity for a thorough review of Safeguards and Security requirements with organizations and personnel having minimal to no prior MPC&A training will also be covered. Successful Dual C/S implementation plans must consider not only system design and failure modes, but must also be accompanied with the appropriate ''mind shift'' within operations and technical personnel. This is required to ensure completion of both physical and electronic activities, and system design changes are performed conscientiously and with full awareness of MPC&A requirements.

FITZGERALD, ERIC; KOENIG, RICHARD

2005-06-27T23:59:59.000Z

153

June 4, 2007 Advanced Fault Tolerance Solutions for High Performance Computing  

E-Print Network [OSTI]

June 4, 2007 Advanced Fault Tolerance Solutions for High Performance Computing Workshop on Trends Tolerance Solutions for High Performance Computing Christian Engelmann Oak Ridge National Laboratory, Oak Solutions for High Performance Computing Workshop on Trends, Technologies and Collaborative Opportunities

Engelmann, Christian

154

June 8, 2007 Advanced Fault Tolerance Solutions for High Performance Computing  

E-Print Network [OSTI]

June 8, 2007 Advanced Fault Tolerance Solutions for High Performance Computing Workshop on Trends Tolerance Solutions for High Performance Computing Christian Engelmann Oak Ridge National Laboratory, Oak for High Performance Computing Workshop on Trends, Technologies and Collaborative Opportunities in High

Engelmann, Christian

155

Fewer Faults for Faster Computing | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility ofSmall15.000TechnologyTuneFewer Faults for Faster

156

Colorado Regional Faults  

SciTech Connect (OSTI)

Citation Information: Originator: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Originator: Colorado Geological Survey (CGS) Publication Date: 2012 Title: Regional Faults Edition: First Publication Information: Publication Place: Earth Science & Observation Center, Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder Publisher: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Description: This layer contains the regional faults of Colorado Spatial Domain: Extent: Top: 4543192.100000 m Left: 144385.020000 m Right: 754585.020000 m Bottom: 4094592.100000 m Contact Information: Contact Organization: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Contact Person: Khalid Hussein Address: CIRES, Ekeley Building Earth Science & Observation Center (ESOC) 216 UCB City: Boulder State: CO Postal Code: 80309-0216 Country: USA Contact Telephone: 303-492-6782 Spatial Reference Information: Coordinate System: Universal Transverse Mercator (UTM) WGS’1984 Zone 13N False Easting: 500000.00000000 False Northing: 0.00000000 Central Meridian: -105.00000000 Scale Factor: 0.99960000 Latitude of Origin: 0.00000000 Linear Unit: Meter Datum: World Geodetic System 1984 (WGS ’984) Prime Meridian: Greenwich Angular Unit: Degree Digital Form: Format Name: Shape file

Hussein, Khalid

2012-02-01T23:59:59.000Z

157

Synchronized sampling improves fault location  

SciTech Connect (OSTI)

Transmission line faults must be located accurately to allow maintenance crews to arrive at the scene and repair the faulted section as soon as possible. Rugged terrain and geographical layout cause some sections of power transmission lines to be difficult to reach. In the past, a variety of fault location algorithms were introduced as either an add-on feature in protective relays or stand-alone implementation in fault locators. In both cases, the measurements of current and voltages were taken at one terminal of a transmission line only. Under such conditions, it may become difficult to determine the fault location accurately, since data from other transmission line ends are required for more precise computations. In the absence of data from the other end, existing algorithms have accuracy problems under several circumstances, such as varying switching and loading conditions, fault infeed from the other end, and random value of fault resistance. Most of the one-end algorithms were based on estimation of voltage and current phasors. The need to estimate phasors introduces additional difficulty in high-speed tripping situations where the algorithms may not be fast enough in determining fault location accurately before the current signals disappear due to the relay operation and breaker opening. This article introduces a unique concept of high-speed fault location that can be implemented either as a simple add-on to the digital fault recorders (DFRs) or as a stand-alone new relaying function. This advanced concept is based on the use of voltage and current samples that are synchronously taken at both ends of a transmission line. This sampling technique can be made readily available in some new DFR designs incorporating receivers for accurate sampling clock synchronization using the satellite Global Positioning System (GPS).

Kezunovic, M. [Texas A and M Univ., College Station, TX (United States)] [Texas A and M Univ., College Station, TX (United States); Perunicic, B. [Lamar Univ., Beaumont, TX (United States)] [Lamar Univ., Beaumont, TX (United States)

1995-04-01T23:59:59.000Z

158

Active Probing Approach for Fault Localization in Computer Networks*  

E-Print Network [OSTI]

to develop tools for performing fault localization. We discuss various design issues involved and propose architecture for building such a tool. We describe an algorithm for probe set selection for problem detection a wide range of activities involving network design and operation [7, 9, 17, 18]. Network monitoring can

Sethi, Adarshpal

159

On-line implementation of a fault diagnosis system for three-phase induction motors  

E-Print Network [OSTI]

Condition monitoring of electric machinery has received increased attention due to the advantages it offers in terms of productivity. Automation of the fault detection and diagnosis processes would not only allow for extensive monitoring but also...

Alladi, Vijaya Mallikarjun

2002-01-01T23:59:59.000Z

160

Fault Tolerant MapReduce-MPI using User Level Failure Mitigation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

different models to achieve fault tolerance in MR-MPI: checkpoint-restart and detect-resume. The checkpoint-restart model is implemented using the current MPI standard. It allows...

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Process variation-aware multiple-fault diagnosis of thermometer-coded current-steering DACs  

E-Print Network [OSTI]

detection rate. 8 m/2 m/2x2 thermometer decoder Ci_m/2 Co_1Aware Structural Test of Thermometer Coded Current SteeringFault Diagnosis of Thermometer-Coded Current-Steering DACs

Topaloglu, R O

2007-01-01T23:59:59.000Z

162

Hot Pot Detail - Evidence of Quaternary Faulting  

SciTech Connect (OSTI)

Compilation of published data, field observations and photo interpretation relevant to Quaternary faulting at Hot Pot.

Lane, Michael

2013-06-27T23:59:59.000Z

163

Hot Pot Detail - Evidence of Quaternary Faulting  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Compilation of published data, field observations and photo interpretation relevant to Quaternary faulting at Hot Pot.

Lane, Michael

164

Fault-tolerant rotary actuator  

DOE Patents [OSTI]

A fault-tolerant actuator module, in a single containment shell, containing two actuator subsystems that are either asymmetrically or symmetrically laid out is provided. Fault tolerance in the actuators of the present invention is achieved by the employment of dual sets of equal resources. Dual resources are integrated into single modules, with each having the external appearance and functionality of a single set of resources.

Tesar, Delbert

2006-10-17T23:59:59.000Z

165

Passive fault current limiting device  

DOE Patents [OSTI]

A passive current limiting device and isolator is particularly adapted for use at high power levels for limiting excessive currents in a circuit in a fault condition such as an electrical short. The current limiting device comprises a magnetic core wound with two magnetically opposed, parallel connected coils of copper, a high temperature superconductor or other electrically conducting material, and a fault element connected in series with one of the coils. Under normal operating conditions, the magnetic flux density produced by the two coils cancel each other. Under a fault condition, the fault element is triggered to cause an imbalance in the magnetic flux density between the two coils which results in an increase in the impedance in the coils. While the fault element may be a separate current limiter, switch, fuse, bimetal strip or the like, it preferably is a superconductor current limiter conducting one-half of the current load compared to the same limiter wired to carry the total current of the circuit. The major voltage during a fault condition is in the coils wound on the common core in a preferred embodiment. 6 figs.

Evans, D.J.; Cha, Y.S.

1999-04-06T23:59:59.000Z

166

Internal structure of the Kern Canyon Fault, California: a deeply exhumed strike-slip fault  

E-Print Network [OSTI]

Deformation and mineral alteration adjacent to a 2 km long segment of the Kern Canyon fault near Lake Isabella, California are studied to characterize the internal structure of the fault zone and to understand the development of fault structure...

Neal, Leslie Ann

2002-01-01T23:59:59.000Z

167

Identification of critical stacking faults in thin-film CdTe solar cells  

SciTech Connect (OSTI)

Cadmium telluride (CdTe) is a p-type semiconductor used in thin-film solar cells. To achieve high light-to-electricity conversion, annealing in the presence of CdCl{sub 2} is essential, but the underlying mechanism is still under debate. Recent evidence suggests that a reduction in the high density of stacking faults in the CdTe grains is a key process that occurs during the chemical treatment. A range of stacking faults, including intrinsic, extrinsic, and twin boundary, are computationally investigated to identify the extended defects that limit performance. The low-energy faults are found to be electrically benign, while a number of higher energy faults, consistent with atomic-resolution micrographs, are predicted to be hole traps with fluctuations in the local electrostatic potential. It is expected that stacking faults will also be important for other thin-film photovoltaic technologies.

Yoo, Su-Hyun; Walsh, Aron, E-mail: a.walsh@bath.ac.uk [Global E3 Institute, Department of Materials Science and Engineering, Yonsei University, Seoul 120-749 (Korea, Republic of); Centre for Sustainable Chemical Technologies and Department of Chemistry, University of Bath, Bath BA2 7AY (United Kingdom); Butler, Keith T. [Centre for Sustainable Chemical Technologies and Department of Chemistry, University of Bath, Bath BA2 7AY (United Kingdom); Soon, Aloysius [Global E3 Institute, Department of Materials Science and Engineering, Yonsei University, Seoul 120-749 (Korea, Republic of); Abbas, Ali; Walls, John M., E-mail: j.m.wall@loughborough.ac.uk [Centre for Renewable Energy Systems Technology, School of Electronic, Electrical and Systems Engineering, Loughborough University, Leicestershire LE11 3TU (United Kingdom)

2014-08-11T23:59:59.000Z

168

Development of secondary faults between en echelon, oblique-slip faults: examples from basement controlled, small-fault systems in the Llano Uplift of central Texas  

E-Print Network [OSTI]

between and oriented oblique to the bounding faults. With increasing displacement on the bounding faults, the system of secondary faults evolves from an Elementary to a Compound, to an Advanced geometry, which includes the formation of secondary... to the primary faults. Synthetic faults form interior to and ahead of the bounding faults, increasing the effective overlap. Displacements on antithetic faults are directly related to changes in displacement on associated bounding faults. Additionally...

Hedgcoxe, Howard Reiffert

2012-06-07T23:59:59.000Z

169

Final Project Report: Self-Correcting Controls for VAV System Faults Filter/Fan/Coil and VAV Box Sections  

SciTech Connect (OSTI)

This report addresses original research by the Pacific Northwest National Laboratory for the California Institute for Energy and Environment on self-correcting controls for variable-air-volume (VAV) heating, ventilating and air-conditioning systems and focuses specifically on air handling and VAV box components of the air side of the system. A complete set of faults for these components was compiled and a fault mode analysis performed to understand the detectable symptoms of the faults and the chain of causation. A set of 26 algorithms was developed to facilitate the automatic correction of these faults in typical commercial VAV systems. These algorithms include training tests that are used during commissioning to develop models of normal system operation, passive diagnostics used to detect the symptoms of faults, proactive diagnostics used to diagnose the cause of a fault, and finally fault correction algorithms. Ten of the twenty six algorithms were implemented in a prototype software package that interfaces with a test bed facility at PNNL's Richland, WA, laboratory. Measurement bias faults were instigated in the supply-air temperature sensor and the supply-air flow meter to test the algorithms developed. The algorithms as implemented in the laboratory software correctly detected, diagnosed and corrected these faults. Finally, an economic and impact assessment was performed for the State of California for deployment of self-correcting controls. Assuming 15% HVAC energy savings and a modeled deployment profile, 3.1-5.8 TBu of energy savings are possible by year 15.

Brambley, Michael R.; Fernandez, Nicholas; Wang, Weimin; Cort, Katherine A.; Cho, Heejin; Ngo, Hung; Goddard, James K.

2011-05-01T23:59:59.000Z

170

Use of SCADA Data for Failure Detection in Wind Turbines  

SciTech Connect (OSTI)

This paper discusses the use of existing wind turbine SCADA data for development of fault detection and diagnostic techniques for wind turbines.

Kim, K.; Parthasarathy, G.; Uluyol, O.; Foslien, W.; Sheng, S.; Fleming, P.

2011-10-01T23:59:59.000Z

171

PADded Cache: A New Fault-Tolerance Technique for Cache Memories Philip P. Shirvani and Edward J. McCluskey  

E-Print Network [OSTI]

high quality components (fault avoidance) and design techniques that allow on-line detection the previous techniques. However, for set-associative caches, the overhead of PAD is primarily advantageous if a relatively large number of faults is to be tolerated. The area overhead was estimated at about 10

McCluskey, Edward J.

172

Award ER25750: Coordinated Infrastructure for Fault Tolerance Systems Indiana University Final Report  

SciTech Connect (OSTI)

The main purpose of the Coordinated Infrastructure for Fault Tolerance in Systems initiative has been to conduct research with a goal of providing end-to-end fault tolerance on a systemwide basis for applications and other system software. While fault tolerance has been an integral part of most high-performance computing (HPC) system software developed over the past decade, it has been treated mostly as a collection of isolated stovepipes. Visibility and response to faults has typically been limited to the particular hardware and software subsystems in which they are initially observed. Little fault information is shared across subsystems, allowing little flexibility or control on a system-wide basis, making it practically impossible to provide cohesive end-to-end fault tolerance in support of scientific applications. As an example, consider faults such as communication link failures that can be seen by a network library but are not directly visible to the job scheduler, or consider faults related to node failures that can be detected by system monitoring software but are not inherently visible to the resource manager. If information about such faults could be shared by the network libraries or monitoring software, then other system software, such as a resource manager or job scheduler, could ensure that failed nodes or failed network links were excluded from further job allocations and that further diagnosis could be performed. As a founding member and one of the lead developers of the Open MPI project, our efforts over the course of this project have been focused on making Open MPI more robust to failures by supporting various fault tolerance techniques, and using fault information exchange and coordination between MPI and the HPC system software stack?from the application, numeric libraries, and programming language runtime to other common system components such as jobs schedulers, resource managers, and monitoring tools.

Lumsdaine, Andrew

2013-03-08T23:59:59.000Z

173

Broken Bar Detection in Synchronous Machines Based Wind Energy Conversion System  

E-Print Network [OSTI]

Electrical machines are subject to different types of failures. Early detection of the incipient faults and fast maintenance may prevent costly consequences. Fault diagnosis of wind turbine is especially important because they are situated...

Rahimian, Mina Mashhadi

2012-10-19T23:59:59.000Z

174

Evaluation of the location and recency of faulting near prospective surface facilities in Midway Valley, Nye County, Nevada  

SciTech Connect (OSTI)

Evaluation of surface faulting that may pose a hazard to prospective surface facilities is an important element of the tectonic studies for the potential Yucca Mountain high-level radioactive waste repository in southwestern Nevada. For this purpose, a program of detailed geologic mapping and trenching was done to obtain surface and near-surface geologic data that are essential for determining the location and recency of faults at a prospective surface-facilities site located east of Exile Hill in Midway Valley, near the eastern base of Yucca Mountain. The dominant tectonic features in the Midway Valley area are the north- to northeast-trending, west-dipping normal faults that bound the Midway Valley structural block-the Bow Ridge fault on the west side of Exile Hill and the Paint-brush Canyon fault on the east side of the valley. Trenching of Quaternary sediments has exposed evidence of displacements, which demonstrate that these block-bounding faults repeatedly ruptured the surface during the middle to late Quaternary. Geologic mapping, subsurface borehole and geophysical data, and the results of trenching activities indicate the presence of north- to northeast-trending faults and northwest-trending faults in Tertiary volcanic rocks beneath alluvial and colluvial sediments near the prospective surface-facilities site. North to northeast-trending faults include the Exile Hill fault along the eastern base of Exile Hill and faults to the east beneath the surficial deposits of Midway Valley. These faults have no geomorphic expression, but two north- to northeast-trending zones of fractures exposed in excavated profiles of middle to late Pleistocene deposits at the prospective surface-facilities site appear to be associated with these faults. Northwest-trending faults include the West Portal and East Portal faults, but no disruption of Quaternary deposits by these faults is evident. The western zone of fractures is associated with the Exile Hill fault. The eastern zone of fractures is within Quaternary alluvial sediments, but no bedrock was encountered in trenches and soil pits in this part of the prospective surface facilities site; thus, the direct association of this zone with one or more bedrock faults is uncertain. No displacement of lithologic contacts and soil horizons could be detected in the fractured Quaternary deposits. The results of these investigations imply the absence of any appreciable late Quaternary faulting activity at the prospective surface-facilities site.

Swan, F.H.; Wesling, J.R.; Angell, M.M.; Thomas, A.P.; Whitney, J.W.; Gibson, J.D.

2002-01-17T23:59:59.000Z

175

Predicting fault damage zones by modeling dynamic rupture propagation and comparison  

E-Print Network [OSTI]

faults observed in the SSC reservoir. The modeling of ruptures propagating as self-sustaining pulses, Stanford University, Stanford, California, USA, 2 Now at Upstream Technology, BP America, Houston, Texas University, Houston, California, USA, 4 ConocoPhillips Technology and Projects, Houston, Texas, USA Abstract

Dunham, Eric M.

176

Automated Fault Location In Smart Distribution Systems  

E-Print Network [OSTI]

of utilizing a suitable fault location method. As distribution systems are gradually evolving into smart distribution systems, application of more accurate fault location methods based on gathered data from various Intelligent Electronic Devices (IEDs...

Lotfifard, Saeed

2012-10-19T23:59:59.000Z

177

A Rectilinear-Monotone Polygonal Fault Block Model for Fault-Tolerant Minimal Routing  

E-Print Network [OSTI]

]. In rectangular model, all faulty nodes are grouped in dis- jointed, rectangular areas, called fault blocksA Rectilinear-Monotone Polygonal Fault Block Model for Fault-Tolerant Minimal Routing in Mesh Dajin Wang, Member, IEEE Abstract--We propose a new fault block model, Minimal-Connected-Component (MCC

Wang, Dajin

178

High temperature superconducting fault current limiter  

DOE Patents [OSTI]

A fault current limiter for an electrical circuit is disclosed. The fault current limiter includes a high temperature superconductor in the electrical circuit. The high temperature superconductor is cooled below its critical temperature to maintain the superconducting electrical properties during operation as the fault current limiter. 15 figs.

Hull, J.R.

1997-02-04T23:59:59.000Z

179

Software Fault Diagnosis Peter Zoeteweij  

E-Print Network [OSTI]

Lab, Faculty of Electrical Engineering, Mathematics, and Computer Science, Delft University-to-day basis is constantly growing. Combined with a practically constant rate of faults per line of code in the software development cycle, which aim at exposing such discrepancies. In this context, automated diagnosis

Zoeteweij, Peter

180

Fault tolerant control of automatically controlled vehicles in response to brake system failures  

E-Print Network [OSTI]

in the brake system is vital. In this thesis, nonlinear failure detection filters are used for fault detection of sensors and actuators in a class of nonlinear systems. In this thesis, the effects of brake system failures in an AHS where the vehicle steering...

Hsien, Li-Wei

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Verification of inferred faults by resistivity analysis. Technical progress report, July 17-October 31, 1981  

SciTech Connect (OSTI)

The major purpose of this effort is to detect new faults which may indicate fracture systems with potential for gas production from the black shales. The method is to gather surface geophysical data, principally resistivity, to test Landsat lineaments as faults. A second purpose is to develop an economical method of confirming remotely sensed lineaments as faults or fractures which can be applied in this region and perhaps be extended to the eastern part of the United States. To attain the goal of this work, the planned approach was to use high-powered (3KW) resistivity measurements in a dipole-dipole configuration to penetrate deeply - a rather expensive procedure. Toward this end it was decided to make a preliminary investigation using a scintillation counter in addition to a low-current resistivity measuring instrument. The scintillation counter gave more definite indication of known faults than did the resistivity measurements. The South Graham, North Graham, and the fault at Highways 403-269, Kentucky were all indicated on one traverse by scintillation measurements, but only the North Graham fault was indicated by resistivity, and the resistivities profile was not conclusive. The reason for the inconclusive resistivity result may have been the fact that the fault zones in this region are often thin, sometimes a matter of a few inches.

Jackson, P.L.

1981-01-01T23:59:59.000Z

182

Versatile Silicon Photodiode Detector Technology for Scanning Electron Microscopy with High-Efficiency Sub-5 keV Electron Detection  

E-Print Network [OSTI]

Versatile Silicon Photodiode Detector Technology for Scanning Electron Microscopy with High for Scanning Electron Microscopy, based on ultrashallow p+ n boron-layer photodiodes, features nm-thin anodes, closely-packed photodiodes and through-wafer apertures allow flexible configurations for optimal material

Technische Universiteit Delft

183

Proactive Fault Tolerance for HPC with Xen Virtualization  

SciTech Connect (OSTI)

with thousands of processors. At such large counts of compute nodes, faults are becoming common place. Current techniques to tolerate faults focus on reactive schemes to recover from faults and generally rely on a checkpoint/restart mechanism. Yet, in today's systems, node failures can often be anticipated by detecting a deteriorating health status. Instead of a reactive scheme for fault tolerance (FT), we are promoting a proactive one where processes automatically migrate from ?unhealthy? nodes to healthy ones. Our approach relies on operating system virtualization techniques exemplied by but not limited to Xen. This paper contributes an automatic and transparent mechanism for proactive FT for arbitrary MPI applications. It leverages virtualization techniques combined with health monitoring and load-based migration. We exploit Xen's live migration mechanism for a guest operating system (OS) to migrate an MPI task from a health-deteriorating node to a healthy one without stopping the MPI task during most of the migration. Our proactive FT daemon orchestrates the tasks of health monitoring, load determination and initiation of guest OS migration. Experimental results demonstrate that live migration hides migration costs and limits the overhead to only a few seconds making it an attractive approach to realize FT in HPC systems. Overall, our enhancements make proactive FT a valuable asset for long-running MPI application that is complementary to reactive FT using full checkpoint/ restart schemes since checkpoint frequencies can be reduced as fewer unanticipated failures are encountered. In the context of OS virtualization, we believe that this is the rst comprehensive study of proactive fault tolerance where live migration is actually triggered by health monitoring.

Nagarajan, Arun Babu [North Carolina State University; Mueller, Frank [North Carolina State University; Engelmann, Christian [ORNL; Scott, Stephen L [ORNL

2007-01-01T23:59:59.000Z

184

A Sensor System Based on Semi-Conductor Metal Oxide Technology for In Situ Detection of Coal Fired Combustion Gases  

SciTech Connect (OSTI)

Sensor Research and Development Corporation (SRD) proposed a two-phase program to develop a robust, autonomous prototype analyzer for in situ, real-time detection, identification, and measurement of coal-fired combustion gases and perform field-testing at an approved power generation facility. SRD developed and selected sensor materials showing selective responses to carbon monoxide, carbon dioxide, nitric oxide, nitrogen dioxide, ammonia, sulfur dioxide and hydrogen chloride. Sensor support electronics were also developed to enable prototype to function in elevated temperatures without any issues. Field-testing at DOE approved facility showed the ability of the prototype to detect and estimate the concentration of combustion by-products accurately with relatively low false-alarm rates at very fast sampling intervals.

Brent Marquis

2007-05-31T23:59:59.000Z

185

The effects of lithology and initial fault angle in physical models of fault-propagation folds  

E-Print Network [OSTI]

Experimentally deformed physical rock models are used to examine the effects of changing mechanical stratigraphy and initial fault angle on the development of fault-propagation folds over a flat-ramp-flat thrust geometry. This study also...

McLain, Christopher Thomas

2001-01-01T23:59:59.000Z

186

A fault location approach for fuzzy fault section estimation on radial distribution feeders  

E-Print Network [OSTI]

measured at feeder substations and the fault distance algorithm was tested using data obtained by staging faults on a model of an overhead feeder using EMTP/ATP simulation. The results obtained from the tests were promising. A simple illustration...

Andoh, Kwame Sarpong

2000-01-01T23:59:59.000Z

187

Collateral damage: Evolution with displacement of fracture distribution and secondary fault strands in fault damage zones  

E-Print Network [OSTI]

8 m fault 14 m fault Lonewolf Wadi Araba Carboneras Caletasiltstone, conglomerate Wadi As Sir Limestone gneiss schistFaulkner et al. , 2003], and Wadi Araba [Du Bernard et al. ,

Savage, Heather M.; Brodsky, Emily E.

2011-01-01T23:59:59.000Z

188

Detachment Faulting & Geothermal Resources - Pearl Hot Spring...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Faulting & Geothermal Resources - Pearl Hot Spring, NV Conducting a 3D Converted Shear Wave Project to Reduce Exploration Risk at Wister, CA Crump Geyser: High Precision...

189

Research on Fault Analysis and Fault-Tolerant Control of EV/HEV Powertrain  

E-Print Network [OSTI]

presents research works in the topics of fault analysis and fault tolerant control of an electric vehicle mechanism (transition strategy) at sensor fault occurrence. Index Terms--Electric vehicle, induction motor-tolerant AC motor drives in industrial applications [9-10- 41]. II. ELECTRIC VEHICLE POWERTRAIN COMPONENTS

Brest, Université de

190

Towards Fault-Tolerant Digital Microfluidic Lab-on-Chip: Defects, Fault Modeling, Testing, and Reconfiguration  

E-Print Network [OSTI]

Towards Fault-Tolerant Digital Microfluidic Lab-on-Chip: Defects, Fault Modeling, Testing, NC 27708, USA Abstract Dependability is an important attribute for microfluidic lab-on-chip devices microfluidic lab-on-chip systems. Defects are related to logical fault models that can be viewed not only

Chakrabarty, Krishnendu

191

Contribution of Identified Active Faults to Near Fault Seismic Hazard in the Flinders Ranges  

E-Print Network [OSTI]

Somerville1 , Peggy Quijada1 , Hong Kie Thio1 , Mike Sandiford2 and Mark Quigley2 1. URS Corporation estimates of fault slip rate from Quigley et al. (2006) to quantify the seismic activity rate on the faults of these models was used in conjunction with the active fault model. Quigley et al. (2006) identified a system

Sandiford, Mike

192

Earthquake behavior and structure of oceanic transform faults  

E-Print Network [OSTI]

Oceanic transform faults that accommodate strain at mid-ocean ridge offsets represent a unique environment for studying fault mechanics. Here, I use seismic observations and models to explore how fault structure affects ...

Roland, Emily Carlson

2012-01-01T23:59:59.000Z

193

Low-cost motor drive embedded fault diagnosis systems  

E-Print Network [OSTI]

Electric motors are used widely in industrial manufacturing plants. Bearing faults, insulation faults, and rotor faults are the major causes of electric motor failures. Based on the line current analysis, this dissertation mainly deals with the low...

Akin, Bilal

2009-05-15T23:59:59.000Z

194

active fault segments: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fault activation Kuzmanov, Georgi 140 Early stage evolution of growth faults: 3D seismic insights from the Levant Basin, Eastern Mediterranean Materials Science Websites...

195

Modeling and Measurement Constraints in Fault Diagnostics for HVAC Systems  

E-Print Network [OSTI]

in Fault Diagnostics for HVAC Systems Massieh Najafi 1 ,tools for determining HVAC diagnostics, methods todetect faults in HVAC systems are still generally

Najafi, Massieh

2010-01-01T23:59:59.000Z

196

Physiochemical Evidence of Faulting Processes and Modeling of Fluid in Evolving Fault Systems in Southern California  

SciTech Connect (OSTI)

Our study targets recent (Plio-Pleistocene) faults and young (Tertiary) petroleum fields in southern California. Faults include the Refugio Fault in the Transverse Ranges, the Ellwood Fault in the Santa Barbara Channel, and most recently the Newport- Inglewood in the Los Angeles Basin. Subsurface core and tubing scale samples, outcrop samples, well logs, reservoir properties, pore pressures, fluid compositions, and published structural-seismic sections have been used to characterize the tectonic/diagenetic history of the faults. As part of the effort to understand the diagenetic processes within these fault zones, we have studied analogous processes of rapid carbonate precipitation (scaling) in petroleum reservoir tubing and manmade tunnels. From this, we have identified geochemical signatures in carbonate that characterize rapid CO2 degassing. These data provide constraints for finite element models that predict fluid pressures, multiphase flow patterns, rates and patterns of deformation, subsurface temperatures and heat flow, and geochemistry associated with large fault systems.

Boles, James [Professor

2013-05-24T23:59:59.000Z

197

Self-triggering superconducting fault current limiter  

DOE Patents [OSTI]

A modular and scaleable Matrix Fault Current Limiter (MFCL) that functions as a "variable impedance" device in an electric power network, using components made of superconducting and non-superconducting electrically conductive materials. The matrix fault current limiter comprises a fault current limiter module that includes a superconductor which is electrically coupled in parallel with a trigger coil, wherein the trigger coil is magnetically coupled to the superconductor. The current surge doing a fault within the electrical power network will cause the superconductor to transition to its resistive state and also generate a uniform magnetic field in the trigger coil and simultaneously limit the voltage developed across the superconductor. This results in fast and uniform quenching of the superconductors, significantly reduces the burnout risk associated with non-uniformity often existing within the volume of superconductor materials. The fault current limiter modules may be electrically coupled together to form various "n" (rows).times."m" (columns) matrix configurations.

Yuan, Xing (Albany, NY); Tekletsadik, Kasegn (Rexford, NY)

2008-10-21T23:59:59.000Z

198

An approach for improving Fault-Tolerance in Automotive Modular Embedded Software*  

E-Print Network [OSTI]

An approach for improving Fault-Tolerance in Automotive Modular Embedded Software* * This work has transportation research programme PREDIT) focused on robustness of executive software in critical automotive.killijian}@laas.fr Abstract Error detection and error recovery mechanism must be carefully selected in automotive embedded

Paris-Sud XI, Université de

199

Wind Turbines Condition Monitoring and Fault Diagnosis Using Generator Current Amplitude  

E-Print Network [OSTI]

Wind Turbines Condition Monitoring and Fault Diagnosis Using Generator Current Amplitude in the research of renewable energy sources. In order to make wind turbines as competitive as the classical detection in a Doubly-Fed Induction Generator (DFIG) based wind turbine for stationary and nonstationary

Paris-Sud XI, Université de

200

Sandia National Laboratories: PV Arc-Fault and Ground Fault Detection...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Generator Modeling Radar Friendly Blades Special Programs Techno-Economic Modeling, Analysis, and Support Analysis, Modeling, Cost of Energy, and Policy Impact: Wind Vision 2014...

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Sandia National Laboratories: PV Arc-Fault and Ground Fault Detection and  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLSMolten-Salt StorageNoLong RangePILS

202

Mechanical Models of Fault-Related Folding  

SciTech Connect (OSTI)

The subject of the proposed research is fault-related folding and ground deformation. The results are relevant to oil-producing structures throughout the world, to understanding of damage that has been observed along and near earthquake ruptures, and to earthquake-producing structures in California and other tectonically-active areas. The objectives of the proposed research were to provide both a unified, mechanical infrastructure for studies of fault-related foldings and to present the results in computer programs that have graphical users interfaces (GUIs) so that structural geologists and geophysicists can model a wide variety of fault-related folds (FaRFs).

Johnson, A. M.

2003-01-09T23:59:59.000Z

203

IEEE Transactions on Vehicular Technology CALL FOR PAPERS  

E-Print Network [OSTI]

), Renewable Energy Systems and Vehicular Technology Laboratory, University of Texas- Arlington, E, circuit, and system level issues for energy storage, power electronics, and electromechanical energy-cycle effects Fault-tolerant control of electromechanical energy convertors Reliability and availability

Fang, Yuguang "Michael"

204

Fault Tolerant Control using Cartesian Genetic Programming  

E-Print Network [OSTI]

Fault Tolerant Control using Cartesian Genetic Programming Yoshikazu Hirayama University of York]: Robotics-- Sensors; F.2.2 [Analysis of Algorithms and Problem Complexity]: Nonnumerical Algorithms and Problems General Terms Algorithms, Reliability Keywords cartesian genetic programming, evolutionary

Fernandez, Thomas

205

Microscopic feather fractures in the faulting process  

E-Print Network [OSTI]

assumptions. Although the problem was not solved in this study, the expected ol trajectories for such a solution are shown in Figure 5 (page 20). Both of these concepts indicate a tendency for the local ol to make an angle with the fault greater than 6..., maximum compressive stress, trajectories to a two dimensional during sliding along (dashed lines) in a cylindrical specimen reduced elastic problem. (b) Expected ol trajectories a fault. crack by shear along the crack surfaces (Bieniawski, 1967...

Conrad, Robert Eugene

1974-01-01T23:59:59.000Z

206

Predictive analysis of concealed social network activities based on communication technology choices: early-warning detection of attack signals from terrorist organizations  

E-Print Network [OSTI]

early-warning detection of attack signals from terroristtowards detecting terrorist attack precursors. We ?nd thatof impending terrorist attacks. (Such potential practical

Drozdova, Katya; Samoilov, Michael

2010-01-01T23:59:59.000Z

207

Software for fault detection in HVAC systems in commercial buildings  

E-Print Network [OSTI]

The building sector of the United States currently consumes over 41% of the United States primary energy supply. Estimates suggest that between 5 and 30% of any building's annual energy consumption is unknowingly wasted ...

Deshmukh, Suhrid Avinash

2014-01-01T23:59:59.000Z

208

Principal Component Analysis for Fault Detection and Structure Health Monitoring  

E-Print Network [OSTI]

into the concrete structure, they allow a permanent monitoring [9]. In this work, the monitoring of concrete liner for radioactive intermediate-level long-lived waste and high-level waste at a depth of 500 meters. It will be 1 french National Agency for Radioactive Waste Management 7th European Workshop on Structural Health

Paris-Sud XI, Université de

209

Model identification with application to building control and fault detection  

E-Print Network [OSTI]

(cont.) may still be solved as an unconstrained linear least squares problem. To enforce the constraint on system eigenvalues, the problem is formulated as an unconstrained mixed (linear and non-linear) least-squares ...

Armstrong, Peter Ross, 1950-

2004-01-01T23:59:59.000Z

210

Minimally intrusive strategies for fault detection and energy monitoring  

E-Print Network [OSTI]

This thesis addresses the need for automated monitoring systems that rely on minimally intrusive sensor arrays. The monitoring techniques employed in this thesis require fewer sensors because they take a different approach ...

Cox, Robert Williams, 1979-

2006-01-01T23:59:59.000Z

211

Fault detection of multivariable system using its directional properties  

E-Print Network [OSTI]

); Sannuti and Saberi (1987); Tokarzewski (1996 and 1998) and Wolovich (1973). MacFarlane and Karcanias, 1976 [3] presented their own definition of zeros. This also led to a number of different definitions of transmission zeros and they are not necessarily...; MacFarlane and Karcanias, 1976; Misra et al, 1994; Sannuti and Saberi, 1987; Wolovich, 1973, Rosenbrock, 1970. b) Those connected with the concept of state-zero and input-zero directions introduced in MacFarlane and Karcanias, 1976. c) Those...

Pandey, Amit Nath

2006-04-12T23:59:59.000Z

212

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network [OSTI]

box, fan, and heating/cooling coils in air-handling units.fan efficiency and coil duty. In this chapter, we present a statistical approach for rooftop unit

Najafi, Massieh

2010-01-01T23:59:59.000Z

213

Fault Detection and Diagnosis in Building HVAC Systems.  

E-Print Network [OSTI]

??Building HVAC systems account for more than 30% of annual energy consumption in United States. However, it has become apparent that only in a small… (more)

Najafi, Massieh

2010-01-01T23:59:59.000Z

214

Fault Detection, Diagnostics and Optimmization using BIG Data Analytics  

E-Print Network [OSTI]

roadmap on fixing the ongoing issues in the building based on customer priority. ? Make sure customer understands what to expect from the software. ? Most importantly, customers should trust the AFDD tool! ESL-IC-13-10-58a Proceedings...

Bonifay, X.

2013-01-01T23:59:59.000Z

215

Fault Detection, Isolation and Accommodation Using the Generalized  

E-Print Network [OSTI]

and hardware configuration in the plant. 1. INTRODUCTION In real world processes, such as oil and gas separator model used in oil production facilities. This model simulates a large scale process, which allows], a third-order nonlinear model for a jacketed continuously stirred tank reactor (jcstr) [2], [3

Taylor, James H.

216

Sandia National Laboratories: PV arc-fault detection research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLSMolten-SaltReliability PV Systems ReliabilityWorkshops PVPV

217

Development of Hydrologic Characterization Technology of Fault Zones  

E-Print Network [OSTI]

R.A. Everitt, C.D. Martin, P.M. Thompson) AECL-10560,COG-94- AECL, 1994b. Environmental Impact Statement on thes Nuclear Fuel Waste. AECL -10711, COG-93-1, 496p. Anderson,

Karasaki, Kenzi

2009-01-01T23:59:59.000Z

218

Solid-State Fault Current Limiter Development : Design and Testing Update of a 15kV SSCL Power Stack  

SciTech Connect (OSTI)

ABSTRACT The Solid-State Fault Current Limiter (SSCL) is a promising technology that can be applied to utility power delivery systems to address the problem of increasing fault currents associated with load growth. As demand continues to grow, more power is added to utility system either by increasing generator capacity or by adding distributed generators, resulting in higher available fault currents, often beyond the capabilities of the present infrastructure. The SSCL is power-electronics based equipment designed to work with the present utility system to address this problem. The SSCL monitors the line current and dynamically inserts additional impedance into the line in the event of a fault being detected. The SSCL is based on a modular design and can be configured for 5kV through 69kV systems at nominal current ratings of 1000A to 4000A. Results and Findings This report provides the final test results on the development of 15kV class SSCL single phase power stack. The scope of work included the design of the modular standard building block sub-assemblies, the design and manufacture of the power stack and the testing of the power stack for the key functional tests of continuous current capability and fault current limiting action. Challenges and Objectives Solid-State Current Limiter technology impacts a wide spectrum of utility engineering and operating personnel. It addresses the problems associated with load growth both at Transmission and Distribution class networks. The design concept is pioneering in terms of developing the most efficient and compact power electronics equipment for utility use. The initial test results of the standard building blocks are promising. The independent laboratory tests of the power stack are promising. However the complete 3 phase system needs rigorous testing for performance and reliability. Applications, Values, and Use The SSCL is an intelligent power-electronics device which is modular in design and can provide current limiting or current interrupting capabilities. It can be applied to variety of applications from distribution class to transmission class power delivery grids and networks. It can also be applied to single major commercial and industrial loads and distributed generator supplies. The active switching of devices can be further utilized for protection of substation transformers. The stress on the system can be reduced substantially improving the life of the power system. It minimizes the voltage sag by speedy elimination of heavy fault currents and promises to be an important element of the utility power system. DOE Perspective This development effort is now focused on a 15kV system. This project will help mitigate the challenges of increasing available fault current. DOE has made a major contribution in providing a cost effective SSCL designed to integrate seamlessly into the Transmission and Distribution networks of today and the future. Approach SSCL development program for a 69kV SSCL was initiated which included the use of the Super GTO advanced semiconductor device which won the 2007 R&D100 Award. In the beginning, steps were identified to accomplish the economically viable design of a 69kV class Solid State Current Limiter that is extremely reliable, cost effective, and compact enough to be applied in urban transmission. The prime thrust in design and development was to encompass the 1000A and the 3000A ratings and provide a modular design to cover the wide range of applications. The focus of the project was then shifted to a 15kV class SSCL. The specifications for the 15kV power stack are reviewed. The design changes integrated into the 15kV power stack are discussed. In this Technical Update the complete project is summarized followed by a detailed test report. The power stack independent high voltage laboratory test requirements and results are presented. Keywords Solid State Current Limiter, SSCL, Fault Current Limiter, Fault Current Controller, Power electronics controller, Intelligent power-electronics Device, IED

Dr. Ram Adapa; Mr. Dante Piccone

2012-04-30T23:59:59.000Z

219

Trajectory-Oriented and Fault-Tolerant-Based Intelligent Process Control for Flexible CIGS PV Module Manufacturing; Final Technical Report, 13 May 2002--30 May 2005  

SciTech Connect (OSTI)

ITN Energy Systems, Inc., and Global Solar Energy, Inc., assisted by NREL's PV Manufacturing R&D program, have continued to advance CIGS production technology by developing trajectory-oriented predictive/control models, fault-tolerance control, control platform development, in-situ sensors, and process improvements. Modeling activities included developing physics-based and empirical models for CIGS and sputter-deposition processing, implementing model-based control, and applying predictive models to the construction of new evaporation sources and for control. Model-based control is enabled by implementing reduced or empirical models into a control platform. Reliability improvement activities include implementing preventive maintenance schedules; detecting failed sensors/equipment and reconfiguring to tinue processing; and systematic development of fault prevention and reconfiguration strategies for the full range of CIGS PV production deposition processes. In-situ sensor development activities have resulted in improved control and indicated the potential for enhanced process status monitoring and control of the deposition processes. Substantial process improvements have been made, including significant improvement in CIGS uniformity, thickness control, efficiency, yield, and throughput. In large measure, these gains have been driven by process optimization, which in turn have been enabled by control and reliability improvements due to this PV Manufacturing R&D program.

Simpson, L.; Britt, J.; Birkmire, R.; Vincent, T.

2005-10-01T23:59:59.000Z

220

E-Print Network 3.0 - andreas fault zone Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Chester Summary: accommodated along large plate-boundary faults like the San Andreas transform fault in California. These faults... depend in part on the structure of the tabular...

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

E-Print Network 3.0 - active fault zone Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Earth Structure (2nd Edition), 2004 Summary: 292010 Oceanic Transform Faults and Fracture Zones Transform Fault: Active displacement. Fracture Zone: Fossil... fault, no active...

222

Application of a New Structural Model & Exploration Technologies to Define a Blind Geothermal System: A Viable Alternative to Grid Drilling for Geothermal Exploration: McCoy, Churchill County, NV  

Broader source: Energy.gov [DOE]

DOE Geothermal Technologies Peer Review 2010 - Presentation. Relevance of research: Improve exploration technologies for range-hosted geothermal systems:Employ new concept models and apply existing methods in new ways; Breaking geothermal exploration tasks into new steps, segmenting the problem differently; Testing new models for dilatent structures; Utilizing shallow thermal aquifer model to focus exploration; Refining electrical interpretation methods to map shallow conductive featuresIdentifying key faults as fluid conduits; and Employ soil gas surveys to detect volatile elements and gases common to geothermal systems.

223

Fault-tolerant TCP mechanisms  

E-Print Network [OSTI]

. Synchronizing the receiving TCP states of the server replicas, primary and backup, using TCP reassembly queue improves the overall throughput. TCP retransmissions and replica management daemons are used for failure detection and fail-over. Recovery of a host...

Satapati, Suresh Kumar

2000-01-01T23:59:59.000Z

224

Measuring and Modeling Fault Density for Plume-Fault Encounter Probability Estimation  

SciTech Connect (OSTI)

Emission of carbon dioxide from fossil-fueled power generation stations contributes to global climate change. Storage of this carbon dioxide within the pores of geologic strata (geologic carbon storage) is one approach to mitigating the climate change that would otherwise occur. The large storage volume needed for this mitigation requires injection into brine-filled pore space in reservoir strata overlain by cap rocks. One of the main concerns of storage in such rocks is leakage via faults. In the early stages of site selection, site-specific fault coverages are often not available. This necessitates a method for using available fault data to develop an estimate of the likelihood of injected carbon dioxide encountering and migrating up a fault, primarily due to buoyancy. Fault population statistics provide one of the main inputs to calculate the encounter probability. Previous fault population statistics work is shown to be applicable to areal fault density statistics. This result is applied to a case study in the southern portion of the San Joaquin Basin with the result that the probability of a carbon dioxide plume from a previously planned injection had a 3% chance of encountering a fully seal offsetting fault.

Jordan, P.D.; Oldenburg, C.M.; Nicot, J.-P.

2011-05-15T23:59:59.000Z

225

Enhanced Geothermal Systems Technologies  

Broader source: Energy.gov [DOE]

Geothermal Energy an?d the Enhanced Geothermal Systems Concept The Navy 1 geothermal power plant near Coso Hot Springs, California, is applying EGS technology. Heat is naturally present everywhere in the earth. For all intents and purposes, heat from the earth is inexhaustible. Water is not nearly as ubiquitous in the earth as heat. Most aqueous fluids are derived from surface waters that have percolated into the earth along permeable pathways such as faults. Permeability is a measure of the ease of fluid flow through rock. The permeability of rock results from pores, fractures, joints, faults, and other openings which allow fluids to move. High permeability implies that fluids can flow rapidly through the rock. Permeability and, subsequently, the amount of fluids tend to decrease with depth as openings in the rocks compress from the weight of the overburden.

226

Summary of multiterminal high-voltage direct current transmission technology  

SciTech Connect (OSTI)

This report summarizes the present state of multiterminal (MT) high-voltage direct current (HVDC) power transmission. The purpose is to reassess the need for HVDC circuit breakers and to identify needed research for MT HVDC. The fundamentals of this technology are presented, and previous research and development is reviewed. Although no MT HVDC systems have yet been built, many concepts have been proposed. Some require a dc breaker, and others do not. Both options have advantages and disadvantages for various applications, so the selection will depend on the proposed application. Research is needed to define operating characteristics of various MT HVDC systems. In some applications, dc breakers will be useful, so research into HVDC interruption should continue. Also, dc fault detection and control algorithms for MT systems should be studied.

Biggs, R.B.; Jewell, W.T.

1984-05-01T23:59:59.000Z

227

UniFI: Leveraging Non-Volatile Memories for a Unified Fault Tolerance and Idle Power Management Technique  

E-Print Network [OSTI]

dissipation but also to make power - proportional to performance by managing idle power. The twin challenges noise margins and thermal cycling [42]. Technology scaling and power management both impact systemUniFI: Leveraging Non-Volatile Memories for a Unified Fault Tolerance and Idle Power Management

Wood, David A.

228

Synthesis and evaluation of fault-tolerant quantum computer architectures  

E-Print Network [OSTI]

Fault-tolerance is the cornerstone of practical, large-scale quantum computing, pushed into its prominent position with heroic theoretical efforts. The fault-tolerance threshold, which is the component failure probability ...

Cross, Andrew W. (Andrew William), 1979-

2005-01-01T23:59:59.000Z

229

Observations on the capability of the Criner fault, southern Oklahoma  

E-Print Network [OSTI]

Results of previous investigations have indicated the possibility that recent deformation has occurred on the Criner fault of southern Oklahoma. The Criner fault is located in Carter and Love Counties, Oklahoma, approximately 100 kilometers...

Williamson, Shawn Collin

2012-06-07T23:59:59.000Z

230

Scalable, Fault-tolerant Management in a Service Oriented Architecture  

E-Print Network [OSTI]

Scalable, Fault-tolerant Management in a Service Oriented Architecture Harshawardhan Gadgil: Scalable, Fault-tolerance, Service Oriented Management, Architecture 1. Introduction With the explosion. The service-oriented architecture provides a simple and flexible framework for building sophisticated

231

FEATURE BASED HANDLING OF SURFACE FAULTS IN COMPACT DISC PLAYERS  

E-Print Network [OSTI]

two photo detectors. The distances are the distance from the actual position of the OPU such surface faults. The core idea is not to rely on sensor information during the fault. The sensor signals

Wickerhauser, M. Victor

232

New approach to the fault location problem using synchronized sampling  

E-Print Network [OSTI]

This thesis presents a new approach to solving the problem of fault location on a transmission line using synchronized data from both ends of the line. The synchronized phase voltage and current samples taken during the fault transient are used...

Mrkic, Jasna

2012-06-07T23:59:59.000Z

233

Frictional properties of faults: from observation on the  

E-Print Network [OSTI]

Frictional properties of faults: from observation on the Longitudinal Valley Fault, Taiwan myself lucky to do what I love and to wake up every day, happy and excited about the day to come

Winfree, Erik

234

Development of a bridge fault extractor tool  

E-Print Network [OSTI]

are tools that analyze chip layouts and produce a realistic list of bridging faults within that chip. FedEx, previously developed at Texas A&M University, extracts all two-node intralayer bridges of any given chip layout and optionally extracts all two...) for this tool which aids in more effectively visualizing the bridge faults across the chip. The final aim of this thesis was to perform FedEx output analysis to understand the nature of the defects, such as variation of critical area (the area where...

Bhat, Nandan D.

2005-02-17T23:59:59.000Z

235

Understanding Fault Characteristics of Inverter-Based Distributed Energy Resources  

SciTech Connect (OSTI)

This report discusses issues and provides solutions for dealing with fault current contributions from inverter-based distributed energy resources.

Keller, J.; Kroposki, B.

2010-01-01T23:59:59.000Z

236

The Owens Valley Fault Zone Eastern California and Surface Faulting  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective Jump to:the Nature of theMagmatic

237

Statistical estimation of multiple faults in aircraft gas turbine engines  

E-Print Network [OSTI]

415 Statistical estimation of multiple faults in aircraft gas turbine engines S Sarkar, C Rao of multiple faults in aircraft gas-turbine engines, based on a statistical pattern recognition tool called commercial aircraft engine. Keywords: aircraft propulsion, gas turbine engines, multiple fault estimation

Ray, Asok

238

UNSUPERVISED CLUSTERING FOR FAULT DIAGNOSIS IN NUCLEAR POWER PLANT COMPONENTS  

E-Print Network [OSTI]

1 UNSUPERVISED CLUSTERING FOR FAULT DIAGNOSIS IN NUCLEAR POWER PLANT COMPONENTS Piero Baraldi1 of prototypical behaviors. Its performance is tested with respect to an artificial case study and then applied on transients originated by different faults in the pressurizer of a nuclear power reactor. Key Words: Fault

Boyer, Edmond

239

Diverse neural net solutions to a fault diagnosis problem \\Lambda  

E-Print Network [OSTI]

Abstract The development of a neural net system for fault diagnosis in a mar­ ine diesel engine system solution to a problem of fault diagnosis in a four­stroke marine diesel engine; that of early to recognise faults in simulated data from a diesel engine; specifically to classify combustion condition

Sharkey, Amanda

240

Structure of the eastern Red Rocks and Wind Ridge thrust faults, Wyoming: how a thrust fault gains displacement along strike  

E-Print Network [OSTI]

STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1983 Major Subject: Geology STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN...

Huntsman, Brent Stanley

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Seismoelectric Imaging of a Shallow Fault System Employing Fault Guided Waves  

E-Print Network [OSTI]

Independent sets of reflection seismic and seismoelectric data were collected, processed, and interpreted with the aim of generating and studying guided waves within a fault zone. While seismic surveys have recently been utilized to investigate...

Cohrs, Frelynn Joseph Reese

2012-07-16T23:59:59.000Z

242

Fault Tolerant CORBASpecification, OMG document: ptc/20000404  

E-Print Network [OSTI]

Fault Tolerant CORBASpecification, V1.0 OMG document: ptc/2000­04­04 replaces draft adopted specification ptc/2000­03­04 and submission document orbos/00­01­19 This document is an OMG Final Adopted in the finalization phase. Comments on the content of this document are welcomed, and should be directed to issues

Roma "La Sapienza", Universitŕ di

243

Global Trajectory Planning for Fault Tolerant Manipulators  

E-Print Network [OSTI]

. Khosla Department of Electrical and Computer Engineering and The Robotics Institute, Carnegie Mellon attribute of robot manipulators in a growing range of applications such as space missions, nuclear waste retrieval, and medical robot­ ics. This trend has spawned a research effort in fault toler­ ant robotics

244

Fault-tolerant, Universal Adiabatic Quantum Computation  

E-Print Network [OSTI]

Quantum computation has revolutionary potential for speeding computational tasks such as factoring and simulating quantum systems, but the task of constructing a quantum computer is daunting. Adiabatic quantum computation and other ``hands-off" approaches relieve the need for rapid, precise pulsing to control the system, inspiring at least one high-profile effort to realize a hands-off quantum computing device. But is hands-off incompatible with fault-tolerant? Concerted effort and many innovative ideas have not resolved this question but have instead deepened it, linking it to fundamental problems in quantum complexity theory. Here we present a hands-off approach that is provably (a) capable of scalable universal quantum computation in a non-degenerate ground state and (b) fault-tolerant against an analogue of the usual local stochastic fault model. A satisfying physical and numerical argument indicates that (c) it is also fault-tolerant against thermal excitation below a threshold temperature independent of the computation size.

Ari Mizel

2014-03-30T23:59:59.000Z

245

Coordinated Fault Tolerance for High-Performance Computing  

SciTech Connect (OSTI)

Our work to meet our goal of end-to-end fault tolerance has focused on two areas: (1) improving fault tolerance in various software currently available and widely used throughout the HEC domain and (2) using fault information exchange and coordination to achieve holistic, systemwide fault tolerance and understanding how to design and implement interfaces for integrating fault tolerance features for multiple layers of the software stack—from the application, math libraries, and programming language runtime to other common system software such as jobs schedulers, resource managers, and monitoring tools.

Dongarra, Jack; Bosilca, George; et al.

2013-04-08T23:59:59.000Z

246

Cooperative Fault Tolerant Distributed Computing  

SciTech Connect (OSTI)

HARNESS was proposed as a system that combined the best of emerging technologies found in current distributed computing research and commercial products into a very flexible, dynamically adaptable framework that could be used by applications to allow them to evolve and better handle their execution environment. The HARNESS system was designed using the considerable experience from previous projects such as PVM, MPI, IceT and Cumulvs. As such, the system was designed to avoid any of the common problems found with using these current systems, such as no single point of failure, ability to survive machine, node and software failures. Additional features included improved inter-component connectivity, with full support for dynamic down loading of addition components at run-time thus reducing the stress on application developers to build in all the libraries they need in advance.

Fagg, Graham E.

2006-03-15T23:59:59.000Z

247

HSS Helps Pioneer “Robot” Patrol Technology MDARS- December 11, 2005  

Broader source: Energy.gov [DOE]

HSS Helps Pioneer “Robot” Patrol Technology: Deployment of the DOE Mobile Detection Assessment Response System (MDARS)

248

Remote detection of fissile material : Cherenkov counters for gamma detection  

E-Print Network [OSTI]

The need for large-size detectors for long-range active interrogation (Al) detection has generated interest in water-based detector technologies. AI is done using external radiation sources to induce fission and to detect, ...

Erickson, Anna S

2011-01-01T23:59:59.000Z

249

Revolution in Detection Affairs  

SciTech Connect (OSTI)

The detection of nuclear or radioactive materials for homeland or national security purposes is inherently difficult. This is one reason detection efforts must be seen as just one part of an overall nuclear defense strategy which includes, inter alia, material security, detection, interdiction, consequence management and recovery. Nevertheless, one could argue that there has been a revolution in detection affairs in the past several decades as the innovative application of new technology has changed the character and conduct of detection operations. This revolution will likely be most effectively reinforced in the coming decades with the networking of detectors and innovative application of anomaly detection algorithms.

Stern W.

2013-11-02T23:59:59.000Z

250

Scientific drilling into the San Andreas fault and site characterization research: Planning and coordination efforts. Final technical report  

SciTech Connect (OSTI)

The fundamental scientific issue addressed in this proposal, obtaining an improved understanding of the physical and chemical processes responsible for earthquakes along major fault zones, is clearly of global scientific interest. By sampling the San Andreas fault zone and making direct measurements of fault zone properties to 4.0 km at Parkfield they will be studying an active plate-boundary fault at a depth where aseismic creep and small earthquakes occur and where a number of the scientific questions associated with deeper fault zone drilling can begin to be addressed. Also, the technological challenges associated with drilling, coring, downhole measurements and borehole instrumentation that may eventually have to be faced in deeper drilling can first be addressed at moderate depth and temperature in the Parkfield hole. Throughout the planning process leading to the development of this proposal they have invited participation by scientists from around the world. As a result, the workshops and meetings they have held for this project have involved about 350 scientists and engineers from about a dozen countries.

Zoback, M.D.

1998-08-30T23:59:59.000Z

251

A 4000-A HVDC (high-voltage direct-current) circuit breaker with fast fault-clearing capability: Final report  

SciTech Connect (OSTI)

This project is a follow-up of the first development of a 500 kV HVDC airblast circuit breaker (EPRI project 1507-3). The objective was to increase the current interrupting capability from 2200 A to 4000 A and shorten its fault clearing time. A high current 500 kV HVDC circuit breaker has been built using the passive commutation circuit. The breaker is modular in construction and can be designed for a wide variety of system conditions. More than 400 current interruptions were carried out successfully. Tests have shown that this circuit breaker is capable of interrupting more than 4000 A dc. Practical breakers with current interrupting capability of even 5500 A dc could be built. The circuit breaker operation and the fault-clearing process can be materially speeded up if the trip signal is given as soon as the fault is detected and without waiting for the current levels to come down in response to converter control action. The new dc breakers are shown to be capable of withstanding these transient arc currents of 8000 A without affecting its ability to interrupt the direct current that follows the transient. This transient current withstand capability is greater than is likely to occur during dc faults. The fault clearing time of this HVDC circuit breaker is comparable to the fault clearing time of conventional ac breakers for ac faults. The developed HVDC circuit breaker is now commercially available and can be supplied for use in HVDC systems. Its use in such systems is expected to provide flexibility in system design and contribute to system stability. 38 refs., 52 figs., 9 tabs.

Not Available

1988-04-01T23:59:59.000Z

252

ENGINEERING TECHNOLOGY Engineering Technology  

E-Print Network [OSTI]

, Mechatronics Technology, and Renewable Energy Technology. Career Opportunities Graduates of four: business administration, wind farm management, aircraft maintenance, tooling production, quality and safety or selected program track focus. Transfer students must talk to their advisor about transferring their courses

253

ENGINEERING TECHNOLOGY Engineering Technology  

E-Print Network [OSTI]

: business administration, energy management, wind farm management, automation and controls, aircraft, Mechatronics Technology, and Renewable Energy Technology. Career Opportunities Graduates of four students must talk to their advisor about transferring their courses over for WSU credit. Laboratory

254

Completing fault models for abductive diagnosis  

SciTech Connect (OSTI)

In logic-based diagnosis, the consistency-based method is used to determine the possible sets of faulty devices. If the fault models of the devices are incomplete or nondeterministic, then this method does not necessarily yield abductive explanations of system behavior. Such explanations give additional information about faulty behavior and can be used for prediction. Unfortunately, system descriptions for the consistency-based method are often not suitable for abductive diagnosis. Methods for completing the fault models for abductive diagnosis have been suggested informally by Poole and by Cox et al. Here we formalize these methods by introducing a standard form for system descriptions. The properties of these methods are determined in relation to consistency-based diagnosis and compared to other ideas for integrating consistency-based and abductive diagnosis.

Knill, E. (Los Alamos National Lab., NM (United States)); Cox, P.T.; Pietrzykowski, T. (Technical Univ., NS (Canada))

1992-11-05T23:59:59.000Z

255

Calculating the probability of injected carbon dioxide plumes encountering faults  

SciTech Connect (OSTI)

One of the main concerns of storage in saline aquifers is leakage via faults. In the early stages of site selection, site-specific fault coverages are often not available for these aquifers. This necessitates a method using available fault data to estimate the probability of injected carbon dioxide encountering and migrating up a fault. The probability of encounter can be calculated from areal fault density statistics from available data, and carbon dioxide plume dimensions from numerical simulation. Given a number of assumptions, the dimension of the plume perpendicular to a fault times the areal density of faults with offsets greater than some threshold of interest provides probability of the plume encountering such a fault. Application of this result to a previously planned large-scale pilot injection in the southern portion of the San Joaquin Basin yielded a 3% and 7% chance of the plume encountering a fully and half seal offsetting fault, respectively. Subsequently available data indicated a half seal-offsetting fault at a distance from the injection well that implied a 20% probability of encounter for a plume sufficiently large to reach it.

Jordan, P.D.

2011-04-01T23:59:59.000Z

256

The design and enhancement of a testbed for the remote system monitoring interface device technology  

E-Print Network [OSTI]

Texas A&M University is developing an information technology-based system that is able to continuously monitor and diagnose faults of electrical motors, based solely on electrical signals available at the motor terminals, such as current and voltage...

Turner, Regan Christopher

2013-02-22T23:59:59.000Z

257

Undulator Hall Air Temperature Fault Scenarios  

SciTech Connect (OSTI)

Recent experience indicates that the LCLS undulator segments must not, at any time following tuning, be allowed to change temperature by more than about {+-}2.5 C or the magnetic center will irreversibly shift outside of acceptable tolerances. This vulnerability raises a concern that under fault conditions the ambient temperature in the Undulator Hall might go outside of the safe range and potentially could require removal and retuning of all the segments. In this note we estimate changes that can be expected in the Undulator Hall air temperature for three fault scenarios: (1) System-wide power failure; (2) Heating Ventilation and Air Conditioning (HVAC) system shutdown; and (3) HVAC system temperature regulation fault. We find that for either a system-wide power failure or an HVAC system shutdown (with the technical equipment left on), the short-term temperature changes of the air would be modest due to the ability of the walls and floor to act as a heat ballast. No action would be needed to protect the undulator system in the event of a system-wide power failure. Some action to adjust the heat balance, in the case of the HVAC power failure with the equipment left on, might be desirable but is not required. On the other hand, a temperature regulation failure of the HVAC system can quickly cause large excursions in air temperature and prompt action would be required to avoid damage to the undulator system.

Sevilla, J.; Welch, J.; /SLAC; ,

2010-11-17T23:59:59.000Z

258

LMFBR fuel-design environment for endurance testing, primarily of oxide fuel elements with local faults  

SciTech Connect (OSTI)

The US Department of Energy LMFBR Lines-of-Assurance are briefly stated and local faults are given perspective with an historical review and definition to help define the constraints of LMFBR fuel-element designs. Local-fault-propagation (fuel-element failure-propagation and blockage propagation) perceptions are reviewed. Fuel pin designs and major LMFBR parameters affecting pin performance are summarized. The interpretation of failed-fuel data is aided by a discussion of the effects of nonprototypicalities. The fuel-pin endurance expected in the US, USSR, France, UK, Japan, and West Germany is outlined. Finally, fuel-failure detection and location by delayed-neutron and gaseous-fission-product monitors are briefly discussed to better realize the operational limits.

Warinner, D.K.

1980-01-01T23:59:59.000Z

259

Similarity Matching Techniques for Fault Diagnosis in Automotive Infotainment Electronics  

E-Print Network [OSTI]

Fault diagnosis has become a very important area of research during the last decade due to the advancement of mechanical and electrical systems in industries. The automobile is a crucial field where fault diagnosis is given a special attention. Due to the increasing complexity and newly added features in vehicles, a comprehensive study has to be performed in order to achieve an appropriate diagnosis model. A diagnosis system is capable of identifying the faults of a system by investigating the observable effects (or symptoms). The system categorizes the fault into a diagnosis class and identifies a probable cause based on the supplied fault symptoms. Fault categorization and identification are done using similarity matching techniques. The development of diagnosis classes is done by making use of previous experience, knowledge or information within an application area. The necessary information used may come from several sources of knowledge, such as from system analysis. In this paper similarity matching tec...

Kabir, Mashud

2009-01-01T23:59:59.000Z

260

Pressure test data reveal reservoir barriers/faults  

SciTech Connect (OSTI)

A review of transient pressure test data from an oil reservoir in Libya indicated not only the suspected fault barriers, but also the non-sealing portions of the faults. Extensive seismic data indicated much faulting, and directional trends had been interpreted to be generally northwest-southeast. The reservoir is a heterogeneous dolomite with average permeability of 40 to 50 md and contains neither natural fractures not stratification. Vertical displacement (throw) of each fault block is indicated to be within the range of the dolomite thickness, i.e., 40 to 180 ft. Therefore, when the fault throw is greater than reservoir thickness there is sealing, and when the throw is less than reservoir thickness the faults are non-sealing.

Hurd, J.D.

1984-07-30T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

A Turing Machine Resisting Isolated Bursts Of Faults  

E-Print Network [OSTI]

We consider computations of a Turing machine under noise that causes consecutive violations of the machine's transition function. Given a constant upper bound B on the size of bursts of faults, we construct a Turing machine M(B) subject to faults that can simulate any fault-free machine under the condition that bursts are not closer to each other than V for an appropriate V = O(B^2).

Capuni, Ilir

2012-01-01T23:59:59.000Z

262

1498 JOURNAL OF ,\\TMOSPHERIC AND OCEANIC TECHNOLOGY VULIIME 25 A Techniqne for the Automatic Detection of Insect Clutter in Cloud Radar Returns  

E-Print Network [OSTI]

Radiation Measurement (ARM) Program operales 35- GHz millimclcr·w:lvclenglh cloud radars (MMCRs) in several levels in scan- ning weather radar applications (e.g., Vaughn 1985; Achtemeier 199]; Wilson el al. 1994 Detection of Insect Clutter in Cloud Radar Returns EDWARD P. LUKE, PAVLOS KOLLlAS, AND KAREN L. JOHNSON Aml

263

PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL LABORATORIES Jay Johnson 1 , Birger Pahl 2 , Charles Luebke 2 , Tom Pier 2 , Theodore Miller 3 , Jason Strauch 1 ,...

264

automatic fault management: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Software Fault Diagnosis by Exploiting Application Signatures Xiaoning Ding - The Ohio - The Ohio State University ABSTRACT Application problem diagnosis in complex...

265

Active Fault Controls At High-Temperature Geothermal Sites- Prospectin...  

Open Energy Info (EERE)

the level of unrecognized active faults present in these areas. Analysis of low-sun-angle aerial photography acquired over the Needle Rocks, Astor Pass, Empire, and Lee...

266

Controls on Fault-Hosted Fluid Flow: Preliminary Results from...  

Open Energy Info (EERE)

Results from the Coso Geothermal Field, CA Abstract cap rock, permeability, fault, fracture, clay, Coso Authors Davatzes, N.C.; Hickman and S.H. Published Geothermal Resource...

267

Fault-tolerant distributed transactions for partitioned OLTP databases  

E-Print Network [OSTI]

This thesis presents Dtxn, a fault-tolerant distributed transaction system designed specifically for building online transaction processing (OLTP) databases. Databases have traditionally been designed as general purpose ...

Jones, Evan P. C. (Evan Philip Charles), 1981-

2012-01-01T23:59:59.000Z

268

Active Fault Segments As Potential Earthquake Sources- Inferences...  

Open Energy Info (EERE)

have not been investigated to determine their subsurface geometry, faulting intensity and constituents (fluids, sediments) for proper characterization of tectonic rift...

269

Upper crustal faulting in an obliquely extending orogen, structural...  

Open Energy Info (EERE)

eastern California Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Upper crustal faulting in an obliquely extending orogen,...

270

Design of a decentralized detection filter for a class of interconnected LTI systems  

E-Print Network [OSTI]

In this thesis, we consider the problem of designing a decentralized detection filter for a class of homogeneous interconnected systems. In this class of systems, all subsystems have an identical structure. A fault in a subsystem propagates via...

Shankar, Shamanth

2001-01-01T23:59:59.000Z

271

Efficient Fault Tolerance: an Approach to Deal with Transient Faults in Multiprocessor Architectures  

E-Print Network [OSTI]

, 36, 56126 Pisa, Italy ** IEI/CNR, Via S. Maria, 46, 56126 Pisa, Italy Abstract Dynamic error, while making efficient use of the available resources. To this end, dynamic error processing must is integrated with a mechanism for dynamic error processing in a complete fault tolerance strategy. Reliability

Firenze, UniversitĂ  degli Studi di

272

The structure and evolution of small-displacement strike-slip faults in porous sandstone  

E-Print Network [OSTI]

relationship between the progressive addition of subsidiary fault segments (deformation bands) and earlier-formed linkage structures. The along-strike variability and distribution of fault structure are documented and used to assess the role of early fault...

Schafer, Kirk Wyatt

2002-01-01T23:59:59.000Z

273

Early Holocene and Late Pleistocene slip rates of the southern Dead Sea Fault determined from 10  

E-Print Network [OSTI]

sites located along the Wadi Araba Fault (WAF) segment of the Dead Sea Fault are targeted on the DSF, focusing on the Wadi Araba Fault (WAF) segment (Figure 1b). The WAF strikes N12°E for about 160

Klinger, Yann

274

Sandia National Laboratories: parallel arc-fault  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbine bladelifetime ismobileparallel arc-fault Sandia Research on PV

275

Sandia National Laboratories: arc-fault detector  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1development Sandia, NREL Release Wavearc-fault circuit interrupter Sandia Research

276

E-Print Network 3.0 - advanced nuclear technology Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

: Objectives: Develop and demonstrate technologies for detecting the stages of a foreign nuclear weapons... and Testing Nonproliferation Enabling Technologies ... Source:...

277

E-Print Network 3.0 - advancing nuclear technology Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

: Objectives: Develop and demonstrate technologies for detecting the stages of a foreign nuclear weapons... and Testing Nonproliferation Enabling Technologies ... Source:...

278

Faience Technology  

E-Print Network [OSTI]

by Joanne Hodges. Faience Technology, Nicholson, UEE 2009Egyptian materials and technology, ed. Paul T. Nicholson,Nicholson, 2009, Faience Technology. UEE. Full Citation:

Nicholson, Paul

2009-01-01T23:59:59.000Z

279

Energy-Efficient Fault Tolerance in Chip Multiprocessors Using Critical Value Forwarding Pramod Subramanyan Virendra Singh Kewal K. Saluja Erik Larsson  

E-Print Network [OSTI]

and present a different set of design challenges. The commodity market requires configurable [1] and low cost fabrication technology has permitted exponential increases in the transistor budgets of microprocessors]. However, the trend towards unreliable components means that fault tolerance is now important

Larsson, Erik

280

Fault Current Contribution from Single-Phase PV Inverters  

SciTech Connect (OSTI)

A significant increase in photovoltaic (PV) system installations is expected to come on line in the near future and as the penetration level of PV increases, the effect of PV may no longer be considered minimal. One of the most important attributions of additional PV is what effect this may have on protection systems. Protection engineers design protection systems to safely eliminate faults from the electric power system. One of the new technologies recently introduced into the electric power system are distributed energy resources (DER). Currently, inverter-based DER contributes very little to the power balance on all but a few utility distribution systems. As DER become prevalent in the distribution system, equipment rating capability and coordination of protection systems merit a closer investigation. A collaborative research effort between the National Renewable Energy Laboratory (NREL) and Southern California Edison (SCE) involved laboratory short-circuit testing single-phase (240 VAC) residential type (between 1.5 and 7kW) inverters. This paper will reveal test results obtained from these short-circuit tests.

Keller, J.; Kroposki, B.; Bravo, R.; Robles, S.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

SciTech Connect: Development of Asset Fault Signatures for Prognostic...  

Office of Scientific and Technical Information (OSTI)

Development of Asset Fault Signatures for Prognostic and Health Management in the Nuclear Industry Citation Details In-Document Search Title: Development of Asset Fault Signatures...

282

Fault Analysis at a Wind Power Plant for One Year of Observation: Preprint  

SciTech Connect (OSTI)

This paper analyzes the fault characteristics observed at a wind power plant, and the behavior of the wind power plant under fault events.

Muljadi, E.; Mills, Z.; Foster, R.; Conto, J.; Ellis, A.

2008-07-01T23:59:59.000Z

283

The faults that move during earthquakes do not always come  

E-Print Network [OSTI]

often live near active faults, because where there is a fault there is usually a water supply. And that means these places become part of major trade routes, like the Silk Roads across Asia from Xi urban building. What is even more frighten- ing is that in many parts of the world poor

Cipolla, Roberto

284

Arcing fault in sub-distribution branch circuits  

SciTech Connect (OSTI)

It's well known the importance of short-circuit current evaluation for the design of any power system. Every system is subject to faults, moreover short-circuits and ground faults can be expected in any point. Even if the maximum and minimum values are generally defined with reference at a bolted-fault, bolted short-circuits are rare and the fault usually involves arcing and burning; particularly the limit value of minimum short-circuit depends really on arcing-fault. In earlier experimental investigations into the functional simulation of insulation loss, in branch circuit conductors, the authors chose to normalize the arcing-fault simulation to be used in laboratory tests. This conventional simulation allows characterization of this intrinsically random phenomenon by means of a probabilistic approach, in order to define in statistical terms the expected short circuit value. The authors examine more closely the arcing-fault in the design of sub distribution branch-circuits as weak points of the installation. In fact, what they propose are straightforward criteria, whether in the structure of the system or in the coordination of protection, which afford a more rational control on arcing-fault.

Parise, G.; Grasseli, U.; Luozzo, V. Di (Univ. di Roma, Rome (Italy). Dept. di Ingegneria Elettrica)

1993-04-01T23:59:59.000Z

285

SEISMIC INVESTIGATION OF WRENCH FAULTING AND FRACTURING AT RULISON  

E-Print Network [OSTI]

to gas production at Rulison. Fracture zones are associated with fault trends and areas of deformation networks that help determine gas migration and accumulation. This thesis presents the characterization of the complex wrench fault network at Rulison Field, and its linkage to enhanced natural fracture zones. Rulison

286

Fault Tolerant Oxygen Control of a Diesel Engine Air System  

E-Print Network [OSTI]

Fault Tolerant Oxygen Control of a Diesel Engine Air System Rainer Nitsche Matthias Bitzer control problem of a Diesel engine air system having a jammed Exhaust Gas Recirculation (EGR) valve of the air system. Keywords: Fault tolerant control, Diesel engine, Air system, Model-based trajectory

Paris-Sud XI, Université de

287

Using Reinforcement Learning for Proactive Network Fault Management  

E-Print Network [OSTI]

fault management demands intelligent man­ agement actions be taken by central manager or remote agents.g., alarms) which appear sequentially. For example, on the manager's side, polling devices randomly (orUsing Reinforcement Learning for Proactive Network Fault Management Qiming He, Mark A. Shayman

Shayman, Mark A.

288

Acceleration and evolution of faults: An example from the Hunter MountainPanamint Valley fault zone, Eastern California  

E-Print Network [OSTI]

: R.D. van der Hilst Keywords: geodesy fault evolution InSAR rock mechanics Western United States assumes a monotonic increase in slip rate with time as the fault matures and straightens. The rate. However, before this can be realized, we need to better understand the various sources for discrepancies

Amelung, Falk

289

Boullier The fault zone geology 1 Fault zone geology: lessons from drilling through the Nojima and 1  

E-Print Network [OSTI]

drilling through the Nojima and 1 Chelungpu faults 2 3 Anne-Marie Boullier 4-Marie.Boullier@obs.ujf-grenoble.fr 8 9 Abstract 10 Several drilling projects have been conducted through significant topics 32 for future research, one of which was "fault zone drilling

Paris-Sud XI, Université de

290

Boullier The fault zone geology 1 Fault zone geology: lessons from drilling through the Nojima and 1  

E-Print Network [OSTI]

drilling through the Nojima and 1 Chelungpu faults 2 3 Anne-Marie Boullier 4-Marie.Boullier@obs.ujf-grenoble.fr 8 9 Abstract 10 Several drilling projects have been conducted through was "fault zone drilling combined with surface-based 33 geophysical and geological

Boyer, Edmond

291

Feb. 11, 2008 Advanced Fault Tolerance Solutions for High Performance Computing 1/47 Advanced Fault Tolerance Solutions  

E-Print Network [OSTI]

Feb. 11, 2008 Advanced Fault Tolerance Solutions for High Performance Computing 1/47 RAS RAS Advanced Fault Tolerance Solutions for High Performance Computing Christian Engelmann Oak Ridge National Solutions for High Performance Computing 2/47 · Nation's largest energy laboratory · Nation's largest

Engelmann, Christian

292

A Fault-Oblivious Extreme-Scale Execution Environment (FOX)  

SciTech Connect (OSTI)

IBM Research’s contribution to the Fault Oblivious Extreme-scale Execution Environment (FOX) revolved around three core research deliverables: ? collaboration with Boston University around the Kittyhawk cloud infrastructure which both enabled a development and deployment platform for the project team and provided a fault-injection testbed to evaluate prototypes ? operating systems research focused on exploring role-based operating system technologies through collaboration with Sandia National Labs on the NIX research operating system and collaboration with the broader IBM Research community around a hybrid operating system model which became known as FusedOS ? IBM Research also participated in an advisory capacity with the Boston University SESA project, the core of which was derived from the K42 operating system research project funded in part by DARPA’s HPCS program. Both of these contributions were built on a foundation of previous operating systems research funding by the Department of Energy’s FastOS Program. Through the course of the X-stack funding we were able to develop prototypes, deploy them on production clusters at scale, and make them available to other researchers. As newer hardware, in the form of BlueGene/Q, came online, we were able to port the prototypes to the new hardware and release the source code for the resulting prototypes as open source to the community. In addition to the open source coded for the Kittyhawk and NIX prototypes, we were able to bring the BlueGene/Q Linux patches up to a more recent kernel and contribute them for inclusion by the broader Linux community. The lasting impact of the IBM Research work on FOX can be seen in its effect on the shift of IBM’s approach to HPC operating systems from Linux and Compute Node Kernels to role-based approaches as prototyped by the NIX and FusedOS work. This impact can be seen beyond IBM in follow-on ideas being incorporated into the proposals for the Exasacale Operating Systems/Runtime program.

Van Hensbergen, Eric; Speight, William; Xenidis, Jimi

2013-03-15T23:59:59.000Z

293

Prognostics and Health Management in Nuclear Power Plants: A Review of Technologies and Applications  

SciTech Connect (OSTI)

This report reviews the current state of the art of prognostics and health management (PHM) for nuclear power systems and related technology currently applied in field or under development in other technological application areas, as well as key research needs and technical gaps for increased use of PHM in nuclear power systems. The historical approach to monitoring and maintenance in nuclear power plants (NPPs), including the Maintenance Rule for active components and Aging Management Plans for passive components, are reviewed. An outline is given for the technical and economic challenges that make PHM attractive for both legacy plants through Light Water Reactor Sustainability (LWRS) and new plant designs. There is a general introduction to PHM systems for monitoring, fault detection and diagnostics, and prognostics in other, non-nuclear fields. The state of the art for health monitoring in nuclear power systems is reviewed. A discussion of related technologies that support the application of PHM systems in NPPs, including digital instrumentation and control systems, wired and wireless sensor technology, and PHM software architectures is provided. Appropriate codes and standards for PHM are discussed, along with a description of the ongoing work in developing additional necessary standards. Finally, an outline of key research needs and opportunities that must be addressed in order to support the application of PHM in legacy and new NPPs is presented.

Coble, Jamie B.; Ramuhalli, Pradeep; Bond, Leonard J.; Hines, Wes; Upadhyaya, Belle

2012-07-17T23:59:59.000Z

294

Detection Science  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Chemistry for Measurement and Detection Science Chemistry for Measurement and Detection Science Project Description Chemistry used in measurement and detection science plays a...

295

Steps toward fault-tolerant quantum chemistry.  

SciTech Connect (OSTI)

Developing quantum chemistry programs on the coming generation of exascale computers will be a difficult task. The programs will need to be fault-tolerant and minimize the use of global operations. This work explores the use a task-based model that uses a data-centric approach to allocate work to different processes as it applies to quantum chemistry. After introducing the key problems that appear when trying to parallelize a complicated quantum chemistry method such as coupled-cluster theory, we discuss the implications of that model as it pertains to the computational kernel of a coupled-cluster program - matrix multiplication. Also, we discuss the extensions that would required to build a full coupled-cluster program using the task-based model. Current programming models for high-performance computing are fault-intolerant and use global operations. Those properties are unsustainable as computers scale to millions of CPUs; instead one must recognize that these systems will be hierarchical in structure, prone to constant faults, and global operations will be infeasible. The FAST-OS HARE project is introducing a scale-free computing model to address these issues. This model is hierarchical and fault-tolerant by design, allows for the clean overlap of computation and communication, reducing the network load, does not require checkpointing, and avoids the complexity of many HPC runtimes. Development of an algorithm within this model requires a change in focus from imperative programming to a data-centric approach. Quantum chemistry (QC) algorithms, in particular electronic structure methods, are an ideal test bed for this computing model. These methods describe the distribution of electrons in a molecule, which determine the properties of the molecule. The computational cost of these methods is high, scaling quartically or higher in the size of the molecule, which is why QC applications are major users of HPC resources. The complexity of these algorithms means that MPI alone is insufficient to achieve parallel scaling; QC developers have been forced to use alternative approaches to achieve scalability and would be receptive to radical shifts in the programming paradigm. Initial work in adapting the simplest QC method, Hartree-Fock, to this the new programming model indicates that the approach is beneficial for QC applications. However, the advantages to being able to scale to exascale computers are greatest for the computationally most expensive algorithms; within QC these are the high-accuracy coupled-cluster (CC) methods. Parallel coupledcluster programs are available, however they are based on the conventional MPI paradigm. Much of the effort is spent handling the complicated data dependencies between the various processors, especially as the size of the problem becomes large. The current paradigm will not survive the move to exascale computers. Here we discuss the initial steps toward designing and implementing a CC method within this model. First, we introduce the general concepts behind a CC method, focusing on the aspects that make these methods difficult to parallelize with conventional techniques. Then we outline what is the computational core of the CC method - a matrix multiply - within the task-based approach that the FAST-OS project is designed to take advantage of. Finally we outline the general setup to implement the simplest CC method in this model, linearized CC doubles (LinCC).

Taube, Andrew Garvin

2010-05-01T23:59:59.000Z

296

Self field triggered superconducting fault current limiter  

DOE Patents [OSTI]

A superconducting fault current limiter array with a plurality of superconductor elements arranged in a meanding array having an even number of supconductors parallel to each other and arranged in a plane that is parallel to an odd number of the plurality of superconductors, where the odd number of supconductors are parallel to each other and arranged in a plane that is parallel to the even number of the plurality of superconductors, when viewed from a top view. The even number of superconductors are coupled at the upper end to the upper end of the odd number of superconductors. A plurality of lower shunt coils each coupled to the lower end of each of the even number of superconductors and a plurality of upper shunt coils each coupled to the upper end of each of the odd number of superconductors so as to generate a generally orthoganal uniform magnetic field during quenching using only the magenetic field generated by the superconductors.

Tekletsadik, Kasegn D. (Rexford, NY)

2008-02-19T23:59:59.000Z

297

Locating hardware faults in a parallel computer  

DOE Patents [OSTI]

Locating hardware faults in a parallel computer, including defining within a tree network of the parallel computer two or more sets of non-overlapping test levels of compute nodes of the network that together include all the data communications links of the network, each non-overlapping test level comprising two or more adjacent tiers of the tree; defining test cells within each non-overlapping test level, each test cell comprising a subtree of the tree including a subtree root compute node and all descendant compute nodes of the subtree root compute node within a non-overlapping test level; performing, separately on each set of non-overlapping test levels, an uplink test on all test cells in a set of non-overlapping test levels; and performing, separately from the uplink tests and separately on each set of non-overlapping test levels, a downlink test on all test cells in a set of non-overlapping test levels.

Archer, Charles J.; Megerian, Mark G.; Ratterman, Joseph D.; Smith, Brian E.

2010-04-13T23:59:59.000Z

298

Sensor for detecting changes in magnetic fields  

DOE Patents [OSTI]

A sensor is described for detecting changes in the magnetic field of the equilibrium-field coil of a Tokamak plasma device that comprises a pair of bifilar wires disposed circumferentially, one inside and one outside the equilibrium-field coil. Each is shorted at one end. The difference between the voltages detected at the other ends of the bifilar wires provides a measure of changing flux in the equilibrium-field coil. This difference can be used to detect faults in the coil in time to take action to protect the coil.

Praeg, W.F.

1980-02-26T23:59:59.000Z

299

Visualization of stacking faults in fcc crystals in plastic deformations  

E-Print Network [OSTI]

Using molecular dynamics simulation, we investigate the dynamics of stacking faults in fcc crystals in uniaxial stretching in a Lennard-Jones binary mixture composed of 4096 particles in three dimensions. We visualize stacking faults using a disorder variable $D_j(t)$ for each particle $j$ constructed from local bond order parameters based on spherical harmonics (Steinhardt order parameters). Also introducing a method of bond breakage, we examine how stacking faults are formed and removed by collective particle motions. These processes are relevant in plasticity of fcc crystals.

Takeshi Kawasaki; Akira Onuki

2011-11-27T23:59:59.000Z

300

Fault-tree construction and calculations on a microcomputer  

E-Print Network [OSTI]

Figure 17 - Program Overview Screen Figure 18 ? Main Menu Screen Figure 19 ? Invalid Command Screen Figure 20 - First Usage of Disk Screen Figure 21 ? Fault-tree Name Screen Figure 22 - Invalid Fault-tree Name Screen Fi gure 23 ? TOP EVENT Label... to do? Fi gure 19. Inval i d Command Screen 53 CREATE - This command allows the user to build a new fault tree. After a CREATE command is entered, the system wi 1 1 display the screen in Figure 20. This question is asked in order to determine...

Beckmann, Jeffery Linn

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Experimental characterization of faults on low-voltage systems  

E-Print Network [OSTI]

arcing ground faults '10'. The first scheme is very similar to the Ground Sensor Protection scheme described in i8j. The second scheme employs the fact that the voltage waveshape at the 1'suit point is flat topped. Harmonic analysis shows that... value when an arcing fault takes place. Continued presence of a, relatively high third- harmonic component in the bus voltage is a definite sign that there is an arcing fault in the system, Kusko and Peeran recommended the use of a, third harmonic...

Ahmed, Jubayer

1992-01-01T23:59:59.000Z

302

Thermal anomalies indicate preferential flow along faults in unconsolidated sedimentary aquifers  

E-Print Network [OSTI]

Thermal anomalies indicate preferential flow along faults in unconsolidated sedimentary aquifers V in unconsolidated siliciclastic aquifers off-set by normal-faults in the Lower Rhine Embayment, Germany. High plane. Most current models of fault hydrology in unconsolidated sedimentary sequences assume faults

Bense, Victor

303

Geometry and scaling relations of a population of very small rift-related normal faults  

E-Print Network [OSTI]

normal faults within the Solite Quarry of the Dan River rift basin range in length from a few millimetres AND SCALING RELATIONS The small normal faults are present in quarries of the Virginia Solite Corporation outcrops and quarried boulders (Fig. 2). The fault traces are typically straight, although the fault tips

304

Analysis of the growth of strike-slip faults using effective medium theory  

SciTech Connect (OSTI)

Increases in the dimensions of strike-slip faults including fault length, thickness of fault rock and the surrounding damage zone collectively provide quantitative definition of fault growth and are commonly measured in terms of the maximum fault slip. The field observations indicate that a common mechanism for fault growth in the brittle upper crust is fault lengthening by linkage and coalescence of neighboring fault segments or strands, and fault rock-zone widening into highly fractured inner damage zone via cataclastic deformation. The most important underlying mechanical reason in both cases is prior weakening of the rocks surrounding a fault's core and between neighboring fault segments by faulting-related fractures. In this paper, using field observations together with effective medium models, we analyze the reduction in the effective elastic properties of rock in terms of density of the fault-related brittle fractures and fracture intersection angles controlled primarily by the splay angles. Fracture densities or equivalent fracture spacing values corresponding to the vanishing Young's, shear, and quasi-pure shear moduli were obtained by extrapolation from the calculated range of these parameters. The fracture densities or the equivalent spacing values obtained using this method compare well with the field data measured along scan lines across the faults in the study area. These findings should be helpful for a better understanding of the fracture density/spacing distribution around faults and the transition from discrete fracturing to cataclastic deformation associated with fault growth and the related instabilities.

Aydin, A.; Berryman, J.G.

2009-10-15T23:59:59.000Z

305

SimHydro 2010:Hydraulic modeling and uncertainty, 2-4 June 2010, Sophia Antipolis N. Jean-Baptiste, C. Dore, J. Sau, P-O. Malaterre -Data assimilation for the real-time update of a 1D hydrodynamique model, fault detection and correction Application  

E-Print Network [OSTI]

SimHydro 2010:Hydraulic modeling and uncertainty, 2-4 June 2010, Sophia Antipolis ­ N. Jean, Hydraulic, Control, Measurement uncertainties, Perturbation, State ABSTRACT Scarcity of water resource technologies for the automatic management of open-surface hydraulic systems. In order to control hydraulic

Boyer, Edmond

306

Combined expert system/neural networks method for process fault diagnosis  

DOE Patents [OSTI]

A two-level hierarchical approach for process fault diagnosis of an operating system employs a function-oriented approach at a first level and a component characteristic-oriented approach at a second level, where the decision-making procedure is structured in order of decreasing intelligence with increasing precision. At the first level, the diagnostic method is general and has knowledge of the overall process including a wide variety of plant transients and the functional behavior of the process components. An expert system classifies malfunctions by function to narrow the diagnostic focus to a particular set of possible faulty components that could be responsible for the detected functional misbehavior of the operating system. At the second level, the diagnostic method limits its scope to component malfunctions, using more detailed knowledge of component characteristics. Trained artificial neural networks are used to further narrow the diagnosis and to uniquely identify the faulty component by classifying the abnormal condition data as a failure of one of the hypothesized components through component characteristics. Once an anomaly is detected, the hierarchical structure is used to successively narrow the diagnostic focus from a function misbehavior, i.e., a function oriented approach, until the fault can be determined, i.e., a component characteristic-oriented approach. 9 figs.

Reifman, J.; Wei, T.Y.C.

1995-08-15T23:59:59.000Z

307

Combined expert system/neural networks method for process fault diagnosis  

DOE Patents [OSTI]

A two-level hierarchical approach for process fault diagnosis is an operating system employs a function-oriented approach at a first level and a component characteristic-oriented approach at a second level, where the decision-making procedure is structured in order of decreasing intelligence with increasing precision. At the first level, the diagnostic method is general and has knowledge of the overall process including a wide variety of plant transients and the functional behavior of the process components. An expert system classifies malfunctions by function to narrow the diagnostic focus to a particular set of possible faulty components that could be responsible for the detected functional misbehavior of the operating system. At the second level, the diagnostic method limits its scope to component malfunctions, using more detailed knowledge of component characteristics. Trained artificial neural networks are used to further narrow the diagnosis and to uniquely identify the faulty component by classifying the abnormal condition data as a failure of one of the hypothesized components through component characteristics. Once an anomaly is detected, the hierarchical structure is used to successively narrow the diagnostic focus from a function misbehavior, i.e., a function oriented approach, until the fault can be determined, i.e., a component characteristic-oriented approach.

Reifman, Jaques (Westchester, IL); Wei, Thomas Y. C. (Downers Grove, IL)

1995-01-01T23:59:59.000Z

308

arcing fault fires: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stacking faults at a production-rate of few gmin. A guideline for controlling the number of layers of such FLG has also been suggested. Karmakar, Soumen; Lalla, Niranjan P;...

309

assembly line fault: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of fault data to verify that all elements of the protection system Siegel, Mel 190 Bucket brigades on in-tree assembly networks John J. Bartholdi III a,*, Donald D. Eisenstein...

310

Microgrid Fault Protection Based on Symmetrical and Differential Current Components  

E-Print Network [OSTI]

Microgrid Fault Protection Based on Symmetrical and Differential Current Components Prepared.........................................................................................8 2. AEP CERTS MICROGRID .........................................................................9 ........................................................................67 #12;3 Index of Figures Figure 1: Schematic representation of the AEP CERTS microgrid

311

Characteristics of Wind Turbines Under Normal and Fault Conditions: Preprint  

SciTech Connect (OSTI)

This paper investigates the characteristics of a variable-speed wind turbine connected to a stiff or weak grid under normal and fault conditions and the role of reactive power compensation.

Muljadi, E.; Butterfield, C. P.; Parsons, B.; Ellis, A.

2007-02-01T23:59:59.000Z

312

Faults as potential hydrocarbon barriers, Arroyo Grande, California  

E-Print Network [OSTI]

Faulting in a sandstone introduces properties which are different from the country rock. Previous work has shown that these new properties can significantly impede the flow of hydrocarbons through the country rock. This thesis seeks to analyze...

Switek, Daniel Paul

1994-01-01T23:59:59.000Z

313

An information model for inter-organizational fault Patricia Marcu  

E-Print Network [OSTI]

in the IT Infrastructure Library (ITIL) [2] and related frameworks in the area of IT service management (ITSM). But since ITIL and the related ITSM frameworks do not consider specific aspects of inter- organizational (fault

314

Understanding Fault Characteristics And Sediment Depth For Geothermal...  

Open Energy Info (EERE)

Fault Characteristics And Sediment Depth For Geothermal Exploration Using 3D Gravity Inversion In Walker Valley, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to...

315

CAPRI : a common architecture for distributed probabilistic Internet fault diagnosis  

E-Print Network [OSTI]

This thesis presents a new approach to root cause localization and fault diagnosis in the Internet based on a Common Architecture for Probabilistic Reasoning in the Internet (CAPRI) in which distributed, heterogeneous ...

Lee, George J. (George Janbing), 1979-

2007-01-01T23:59:59.000Z

316

CAPRI: A Common Architecture for Distributed Probabilistic Internet Fault Diagnosis  

E-Print Network [OSTI]

This thesis presents a new approach to root cause localization and fault diagnosis in the Internet based on a Common Architecture for Probabilistic Reasoning in the Internet (CAPRI) in which distributed, heterogeneous ...

Lee, George J.

2007-06-04T23:59:59.000Z

317

Lossless fault-tolerant data structures with additive overhead  

E-Print Network [OSTI]

We develop the first dynamic data structures that tolerate ? memory faults, lose no data, and incur only an O(? ) additive overhead in overall space and time per operation. We obtain such data structures for arrays, linked ...

Christiano, Paul F.

318

anatolian fault zone: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

across the Mudurnu segment of the North Anatolian Fault Zone (NAFZ) in northwestern Turkey Ben-Zion, Yehuda 2 Velocity contrast across the 1944 rupture zone of the North...

319

STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND...  

Open Energy Info (EERE)

FLANK AND COSO WASH Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND...

320

Identifying Efficiency Degrading Faults in Split Air Conditioning Systems  

E-Print Network [OSTI]

Studies estimate that as much as 50% of packaged air conditioning systems operate in faulty conditions that degrade system efficiency. Common faults include: under- and over-charged systems (too much or too little refrigerant), faulty expansions...

Terrill, T. J.; Brown, M. L.; Cheyne, R. W. Jr.; Cousins, A. J.; Daniels, B. P.; Erb, K. L.; Garcia, P. A.; Leutermann, M. J.; Nel, A. J.; Robert, C. L.; Widger, S. B.; Williams, A. G.; Rasmussen, B. P.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

The northwest extension of the Meers Fault in southwestern Oklahoma  

E-Print Network [OSTI]

THE NORTHWEST EXTENSION OF THE MEERS FAULT IN SOUTIRVESTERN OKLAHOMA A Thesis by HASAN CETIN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May 1991 Major Subject: Geology THE NORTHWEST EXTENSION OF THE MEERS FAULT IN SOUTHWESTERN OKLAHOMA A Thesis by HASAN CETIN Approved as to style and content by: Norman R. ford (Chair of ommittee) Chr stopher C. Mathewson (Member) ne A...

Cetin, Hasan

1991-01-01T23:59:59.000Z

322

Two Similarity Measure Approaches to Whole Building Fault Diagnosis  

E-Print Network [OSTI]

consumption in buildings using similarity measures. The method is referred to as the cosine similarity method if cosine similarity is adopted and is referred to as the Euclidean distance similarity method if Euclidean distance similarity is implemented.... Fig. 1 Block diagram for diagnosing abnormal energy consumption Step 1: Reference Control Change Library Determination Whole building fault diagnosis is different from component level fault diagnosis. It can only give a general clue, for example...

Lin, G.; Claridge, D.

2012-01-01T23:59:59.000Z

323

Technology Assessment  

Broader source: Energy.gov (indexed) [DOE]

Roll to Roll (R2R) Processing 1 Technology Assessment 2 3 Contents 4 1. Introduction to the TechnologySystem ......

324

Revolution in nuclear detection affairs  

SciTech Connect (OSTI)

The detection of nuclear or radioactive materials for homeland or national security purposes is inherently difficult. This is one reason detection efforts must be seen as just one part of an overall nuclear defense strategy which includes, inter alia, material security, detection, interdiction, consequence management and recovery. Nevertheless, one could argue that there has been a revolution in detection affairs in the past several decades as the innovative application of new technology has changed the character and conduct of detection operations. This revolution will likely be most effectively reinforced in the coming decades with the networking of detectors and innovative application of anomaly detection algorithms.

Stern, Warren M. [Nonproliferation and National Security Department, Brookhaven National Laboratory, Upton, New York (United States)

2014-05-09T23:59:59.000Z

325

Fault tolerant, low voltage SRAM design  

E-Print Network [OSTI]

Scaling of process technologies has made power management a significant concern for circuit designers. Moreover, denser integration and shrinking geometries also have a negative impact on circuit reliability. Therefore, ...

Sinangil, Yildiz

2010-01-01T23:59:59.000Z

326

Microcomputer applications of, and modifications to, the modular fault trees  

SciTech Connect (OSTI)

The LaSalle Probabilistic Risk Assessment was the first major application of the modular logic fault trees after the IREP program. In the process of performing the analysis, many errors were discovered in the fault tree modules that led to difficulties in combining the modules to form the final system fault trees. These errors are corrected in the revised modules listed in this report. In addition, the application of the modules in terms of editing them and forming them into the system fault trees was inefficient. Originally, the editing had to be done line by line and no error checking was performed by the computer. This led to many typos and other logic errors in the construction of the modular fault tree files. Two programs were written to help alleviate this problem: (1) MODEDIT - This program allows an operator to retrieve a file for editing, edit the file for the plant specific application, perform some general error checking while the file is being modified, and store the file for later use, and (2) INDEX - This program checks that the modules that are supposed to form one fault tree all link up appropriately before the files are,loaded onto the mainframe computer. Lastly, the modules were not designed for relay type logic common in BWR designs but for solid state type logic. Some additional modules were defined for modeling relay logic, and an explanation and example of their use are included in this report.

Zimmerman, T.L.; Graves, N.L.; Payne, A.C. Jr.; Whitehead, D.W. [Sandia National Labs., Albuquerque, NM (United States)] [Sandia National Labs., Albuquerque, NM (United States)

1994-10-01T23:59:59.000Z

327

The San Andreas Fault System Paul Withers Wallace RE, The San Andreas Fault System, California, USGS Professional Paper 1515,  

E-Print Network [OSTI]

mainland Mexico. The San Andreas fault is commonly referred to as the boundary between the Pacific is correlated with the local geological setting. CO2 lubrication, #12;increased pore pressure, and decreased

Withers, Paul

328

Rupture Dynamics of Strike-Slip Faults with Stepovers: From Conceptually Simplified to Realistically Complex Fault Systems  

E-Print Network [OSTI]

This dissertation investigates the interaction of model II in-plane dynamic rupture with a geometrical discontinuity along the fault strike: stepover. One goal is to understand how large the stepover width must be to stop the dynamic rupture...

Liu, Zaifeng

2014-05-05T23:59:59.000Z

329

Realistic fault modeling and quality test generation of combined delay faults  

E-Print Network [OSTI]

. Summary . . Page . . Vi . Vii . 1X . I 2 . 5 . 5 . 6 . 6 . . . 14 . 14 . 16 . 17 . 18 . 18 . 20 . 20 23 , 33 . 34 36 36 38 . . 44 53 53 2. Future Work . . . . . REFERENCES . VITA Page 54 55 LIST OF FIGURES Fig. 1. Fault... 24 Fig. 10. Fig. 11. Fig. 12. Fig. 13. Fig. 14. Fig. 15. Fig. 16. Fig. 17. Fig. 18. Fig. 19. Fig. 20. Fig. 21. Fig. 22. Fig. 23. Fig. 24. Fig. 25. Path generation algorithm. Example for graph theory . Propagation along longest path...

Thadhlani, Ajaykumar A

2001-01-01T23:59:59.000Z

330

The LMFBR fuel-design environment for endurance testing, primarily of oxide fuel elements with local faults  

SciTech Connect (OSTI)

The U.S. Department of Energy LMFBR Lines-of-Assurance are briefly stated and local faults are given perspective with an historical review and definition to help define the constraints of LMFBR fuel-element designs. Local-fault-propagation (fuel-element-failure propagation and blockage propagation) perceptions are reviewed. Fuel pin designs and major LMFBR parameters affecting pin performance are summarized. The interpretation of failed-fuel data is aided by a discussion of the effects of nonprototypicalities. The fuel-pin endurances expected in the United States, USSR, France, UK, Japan, and West Germany are outlined. Finally, fuel-failure detection and location by delayed-neutron and gaseous-fission product monitors are briefly discussed to better realize the operational limits.

Warinner, D.K.

1983-07-01T23:59:59.000Z

331

High energy arcing fault fires in switchgear equipment : a literature review.  

SciTech Connect (OSTI)

In power generating plants, switchgear provide a means to isolate and de-energize specific electrical components and buses in order to clear downstream faults, perform routine maintenance, and replace necessary electrical equipment. These protective devices may be categorized by the insulating medium, such as air or oil, and are typically specified by voltage classes, i.e. low, medium, and high voltage. Given their high energy content, catastrophic failure of switchgear by means of a high energy arcing fault (HEAF) may occur. An incident such as this may lead to an explosion and fire within the switchgear, directly impact adjacent components, and possibly render dependent electrical equipment inoperable. Historically, HEAF events have been poorly documented and discussed in little detail. Recent incidents involving switchgear components at nuclear power plants, however, were scrupulously investigated. The phenomena itself is only understood on a very elementary level from preliminary experiments and theories; though many have argued that these early experiments were inaccurate due to primitive instrumentation or poorly justified methodologies and thus require re-evaluation. Within the past two decades, however, there has been a resurgence of research that analyzes previous work and modern technology. Developing a greater understanding of the HEAF phenomena, in particular the affects on switchgear equipment and other associated switching components, would allow power generating industries to minimize and possibly prevent future occurrences, thereby reducing costs associated with repair and downtime. This report presents the findings of a literature review focused on arc fault studies for electrical switching equipment. The specific objective of this review was to assess the availability of the types of information needed to support development of improved treatment methods in fire Probabilistic Risk Assessment (PRA) for nuclear power plant applications.

Nowlen, Steven Patrick; Brown, Jason W.; Wyant, Francis John

2008-10-01T23:59:59.000Z

332

Noise canceling in-situ detection  

DOE Patents [OSTI]

Technologies applicable to noise canceling in-situ NMR detection and imaging are disclosed. An example noise canceling in-situ NMR detection apparatus may comprise one or more of a static magnetic field generator, an alternating magnetic field generator, an in-situ NMR detection device, an auxiliary noise detection device, and a computer.

Walsh, David O.

2014-08-26T23:59:59.000Z

333

Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing  

E-Print Network [OSTI]

A quantum computer can solve hard problems - such as prime factoring, database searching, and quantum simulation - at the cost of needing to protect fragile quantum states from error. Quantum error correction provides this protection, by distributing a logical state among many physical qubits via quantum entanglement. Superconductivity is an appealing platform, as it allows for constructing large quantum circuits, and is compatible with microfabrication. For superconducting qubits the surface code is a natural choice for error correction, as it uses only nearest-neighbour coupling and rapidly-cycled entangling gates. The gate fidelity requirements are modest: The per-step fidelity threshold is only about 99%. Here, we demonstrate a universal set of logic gates in a superconducting multi-qubit processor, achieving an average single-qubit gate fidelity of 99.92% and a two-qubit gate fidelity up to 99.4%. This places Josephson quantum computing at the fault-tolerant threshold for surface code error correction. Our quantum processor is a first step towards the surface code, using five qubits arranged in a linear array with nearest-neighbour coupling. As a further demonstration, we construct a five-qubit Greenberger-Horne-Zeilinger (GHZ) state using the complete circuit and full set of gates. The results demonstrate that Josephson quantum computing is a high-fidelity technology, with a clear path to scaling up to large-scale, fault-tolerant quantum circuits.

R. Barends; J. Kelly; A. Megrant; A. Veitia; D. Sank; E. Jeffrey; T. C. White; J. Mutus; A. G. Fowler; B. Campbell; Y. Chen; Z. Chen; B. Chiaro; A. Dunsworth; C. Neill; P. O`Malley; P. Roushan; A. Vainsencher; J. Wenner; A. N. Korotkov; A. N. Cleland; John M. Martinis

2014-02-19T23:59:59.000Z

334

Creating dynamic equivalent PV circuit models with impedance spectroscopy for arc-fault modeling.  

SciTech Connect (OSTI)

Article 690.11 in the 2011 National Electrical Code{reg_sign} (NEC{reg_sign}) requires new photovoltaic (PV) systems on or penetrating a building to include a listed arc fault protection device. Currently there is little experimental or empirical research into the behavior of the arcing frequencies through PV components despite the potential for modules and other PV components to filter or attenuate arcing signatures that could render the arc detector ineffective. To model AC arcing signal propagation along PV strings, the well-studied DC diode models were found to inadequately capture the behavior of high frequency arcing signals. Instead dynamic equivalent circuit models of PV modules were required to describe the impedance for alternating currents in modules. The nonlinearities present in PV cells resulting from irradiance, temperature, frequency, and bias voltage variations make modeling these systems challenging. Linearized dynamic equivalent circuits were created for multiple PV module manufacturers and module technologies. The equivalent resistances and capacitances for the modules were determined using impedance spectroscopy with no bias voltage and no irradiance. The equivalent circuit model was employed to evaluate modules having irradiance conditions that could not be measured directly with the instrumentation. Although there was a wide range of circuit component values, the complex impedance model does not predict filtering of arc fault frequencies in PV strings for any irradiance level. Experimental results with no irradiance agree with the model and show nearly no attenuation for 1 Hz to 100 kHz input frequencies.

Johnson, Jay Dean; Kuszmaul, Scott S.; Strauch, Jason E.; Schoenwald, David Alan

2011-06-01T23:59:59.000Z

335

Molecular probe technology detects bacteria without culture  

E-Print Network [OSTI]

EA, Miranda M, Aparicio AM, Fukushima M, Davis RW: MultiplexCN, Jiang H, Palm C, Fukushima M, Bernstein D, Vo KC,Page 10 of 10 12. Hyman RW, Fukushima M, Diamond L, Kumm J,

2012-01-01T23:59:59.000Z

336

Accident Fault Trees for Defense Waste Processing Facility  

SciTech Connect (OSTI)

The purpose of this report is to document fault tree analyses which have been completed for the Defense Waste Processing Facility (DWPF) safety analysis. Logic models for equipment failures and human error combinations that could lead to flammable gas explosions in various process tanks, or failure of critical support systems were developed for internal initiating events and for earthquakes. These fault trees provide frequency estimates for support systems failures and accidents that could lead to radioactive and hazardous chemical releases both on-site and off-site. Top event frequency results from these fault trees will be used in further APET analyses to calculate accident risk associated with DWPF facility operations. This report lists and explains important underlying assumptions, provides references for failure data sources, and briefly describes the fault tree method used. Specific commitments from DWPF to provide new procedural/administrative controls or system design changes are listed in the ''Facility Commitments'' section. The purpose of the ''Assumptions'' section is to clarify the basis for fault tree modeling, and is not necessarily a list of items required to be protected by Technical Safety Requirements (TSRs).

Sarrack, A.G.

1999-06-22T23:59:59.000Z

337

System for detecting acoustic emissions in multianvil experiments: Application to deep seismicity in the Earth  

E-Print Network [OSTI]

System for detecting acoustic emissions in multianvil experiments: Application to deep seismicity be responsible for the occurrence of earthquakes. Detecting acoustic emissions from a specimen during faulting acoustic emissions under HPHT conditions, due to technical challenges. And those studies have used only one

Jung, Haemyeong

338

Photonic quantum technologies  

E-Print Network [OSTI]

The first quantum technology, which harnesses uniquely quantum mechanical effects for its core operation, has arrived in the form of commercially available quantum key distribution systems that achieve enhanced security by encoding information in photons such that information gained by an eavesdropper can be detected. Anticipated future quantum technologies include large-scale secure networks, enhanced measurement and lithography, and quantum information processors, promising exponentially greater computation power for particular tasks. Photonics is destined for a central role in such technologies owing to the need for high-speed transmission and the outstanding low-noise properties of photons. These technologies may use single photons or quantum states of bright laser beams, or both, and will undoubtably apply and drive state-of-the-art developments in photonics.

Jeremy L. O'Brien; Akira Furusawa; Jelena Vu?kovi?

2010-03-20T23:59:59.000Z

339

Application of Hi-Tc superconducting current fault limiters to utility distribution networks  

SciTech Connect (OSTI)

A new classification of superconducting current fault limiter (SCFL) is described which is a non-quenching, variable-inductance-mode VIM current limiter with characteristics matched to utility distribution line parameters. A major application of this device is for replacement of fixed-inductance air-core reactors used in impedance and short-circuit levels from sub-transmission to distribution. The secondary application of the SCFL is for protection of distribution substation transformers in the 5--40 MVA range, as a replacement for current limiting fuses and air-blast circuit breakers. The SCFL devices have the unique characteristic of producing minimal or no transient recovery voltage (TRV) as is typical of conventional interruption technologies.

Kuznetsov, S.B.; Webb, T.J. [Power Superconducting Devices Inc., Pittsburgh, PA (United States)

1996-10-01T23:59:59.000Z

340

E-Print Network 3.0 - active fault system Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: -8141(95)00105-0 Experimental modeling of extensional fault systems by use of plaster HAAKON FOSSEN Statoil, N-5020 Bergen... -scale structures in relation to larger fault...

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Initiation propagation and termination of elastodynamic ruptures associated with segmentation of faults and shaking  

E-Print Network [OSTI]

Initiation propagation and termination of elastodynamic ruptures associated with segmentation the initiation, propagation, and termination of ruptures and their relationship to fault geometry and shaking of terminations near fault ends; and persistent propagation directivity effects. Taking advantage of long

Shaw, Bruce E.

342

E-Print Network 3.0 - active fault isolation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and those exhibited by much smaller (L 0.15-2 km) more isolated faults... Post-yield fracture mechanics models for the growth of an isolated fault predict a linear...

343

E-Print Network 3.0 - analog fault simulation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sciences 65 Channel flow and the development of parallel-dipping normal faults Thorsten J. Nagel1 Summary: -dipping normal faults we carried out a series of numerical experiments...

344

Characterization of the structure of faults in the Eocene Carrizo Formation near Gause, Milam County, Texas  

E-Print Network [OSTI]

-scale graben accommodating NW-SE extension. The Carrizo Fm. consists primarily of friable to weakly lithified quartz sandstones with several horizons with interbedded siltstones and shales. Five faults and fault zones occur in the quarry with displacements...

Yilmaz, Ramazan

2012-06-07T23:59:59.000Z

345

The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling  

E-Print Network [OSTI]

Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault ...

Gregg, Patricia Michelle Marie

2008-01-01T23:59:59.000Z

346

Fault Current Issues for Market Driven Power Systems with Distributed Generation  

E-Print Network [OSTI]

1 Fault Current Issues for Market Driven Power Systems with Distributed Generation Natthaphob of installing distributed generation (DG) to electric power systems. The proliferation of new generators creates Terms--Distributed / dispersed generation, power distri- bution, power system protection, fault

347

E-Print Network 3.0 - automatic fault tree Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Sample search results for: automatic fault tree Page: << < 1 2 3 4 5 > >> 1 Computer diagnosis systems grounded on hand-crafted fault trees are wide-spread in industrial...

348

Slip on ridge transform faults : insights from earthquakes and laboratory experiments  

E-Print Network [OSTI]

The relatively simple tectonic environment of mid-ocean ridge transform fault (RTF) seismicity provides a unique opportunity for investigation of earthquake and faulting processes. We develop a scaling model that is complete ...

Boettcher, Margaret S

2005-01-01T23:59:59.000Z

349

A methodology for experimentally verifying simulation models for distribution transformer internal faults  

E-Print Network [OSTI]

Internal winding faults comprise 70-80% of modem transformer breakdown. In this era of deregulation, this phenomenon is likely to increase since loading transformers to their optimum capacity is becoming normal practice. These internal faults result...

Palmer-Buckle, Peter

1999-01-01T23:59:59.000Z

350

Locating an active fault zone in Coso geothermal field by analyzing...  

Open Energy Info (EERE)

production and injection drilling, since an active fault zone often acts as a fracture-extensive low-velocity wave guide to seismic waves. We have located an active fault...

351

Power system fault analysis based on intelligent techniques and intelligent electronic device data  

E-Print Network [OSTI]

This dissertation has focused on automated power system fault analysis. New contributions to fault section estimation, protection system performance evaluation and power system/protection system interactive simulation have been achieved. Intelligent...

Luo, Xu

2007-09-17T23:59:59.000Z

352

The effect of fault relayand clay smearing on groundwater flow patterns in the Lower Rhine  

E-Print Network [OSTI]

in the unconsolidated sediments of the Lower Rhine Embayment. Hydraulic head maps show that many individual faults form unconsolidated sediments at shal- low depth is likely to be di¡erent from that of faults at depths where rocks

Bense, Victor

353

Development of a methodology to discriminate incipient insulator faults from distribution system load  

E-Print Network [OSTI]

of incipient insulator faults 4. Determining characteristics most likely to discriminate incipient insulator faults from distribution system load current From this work, the aggregate of the non-harmonic components and the high frequency energy of the leakage...

Richards, Christopher Scott

2000-01-01T23:59:59.000Z

354

Paleoearthquakes of the past 30,000 years along the North Tehran Fault (Iran)  

E-Print Network [OSTI]

Paleoearthquakes of the past 30,000 years along the North Tehran Fault (Iran) J.-F. Ritz,1 H. Ghorashi, and A. Saidi (2012), Paleoearthquakes of the past 30,000 years along the North Tehran Fault (Iran

355

Thermo-and hydro-mechanical processes along faults during rapid slip  

E-Print Network [OSTI]

Thermo- and hydro-mechanical processes along faults during rapid slip James R. Rice & Eric M micro-contacts, and (2) Thermal pressurization of fault-zone pore fluid. Both have characteristics which

Dunham, Eric M.

356

Tarmat behavior calculated for reservoir with sealing fault  

SciTech Connect (OSTI)

The Minagish Oolite oil reservoir in Kuwait is one of many Middle East reservoirs characterized by the presence of a tarmat (heavy to tar-like crude) at the oil-water contact. Since a waterflood project is planned for the Minagish Oolite, which contains a radial pattern of faults, a study was made to consider tarmat behavior upon water injection below it when the injection well is located near a sealing fault. The study resulted in a technique to predict the time of tarmat breakdown, response time at the nearest observation well, and differential pressure at the tarmat anywhere in the reservoir.

Osman, M.E.S.

1986-08-01T23:59:59.000Z

357

Fault-Tolerant Quantum Computation via Exchange interactions  

E-Print Network [OSTI]

Quantum computation can be performed by encoding logical qubits into the states of two or more physical qubits, and controlling a single effective exchange interaction and possibly a global magnetic field. This "encoded universality" paradigm offers potential simplifications in quantum computer design since it does away with the need to perform single-qubit rotations. Here we show that encoded universality schemes can be combined with quantum error correction. In particular, we show explicitly how to perform fault-tolerant leakage correction, thus overcoming the main obstacle to fault-tolerant encoded universality.

M. Mohseni; D. A. Lidar

2004-06-25T23:59:59.000Z

358

IEEE TRANSACTIONS ON POWER ELECTRONICS 1 A Fault-Tolerant Switching Scheme for an Isolated  

E-Print Network [OSTI]

a model- reference adaptive system-based fault diagnosis algorithm for a VSI used as a PMSM drive system

Mazumder, Sudip K.

359

Department of Engineering Technology Technology Education  

E-Print Network [OSTI]

Department of Engineering Technology Technology Education A Teacher Education Program New Jersey Institute of Technology #12;WHAT WILL YOU LEARN? Technology teachers teach problem-based learning utilizing math, science and technology principles. Technological studies involve students: · Designing

Bieber, Michael

360

Distributed Energy Technology Characterization (Desiccant Technologies...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Characterization (Desiccant Technologies), January 2004 Distributed Energy Technology Characterization (Desiccant Technologies), January 2004 The purpose of this report is to...

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

State of the art analysis of online fault location on AC cables in underground transmission systems  

E-Print Network [OSTI]

on transmission level fault location methods have been focused on overhead lines. Because of the very different- termine the fault location. Because only one end meas- urements are used, the algorithm is derived usingState of the art analysis of online fault location on AC cables in underground transmission systems

Bak, Claus Leth

362

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3  

E-Print Network [OSTI]

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3 ground analyses. This is motivated by the normal faults in the vicinity10 of Yucca Mountain, NV, a potential site fault12 located approximately 1 km west of the crest of Yucca Mountain, is the13 most active

Dmowska, Renata

363

IPR: In-Place Reconfiguration for FPGA Fault Tolerance and Rupak Majumdar2  

E-Print Network [OSTI]

IPR: In-Place Reconfiguration for FPGA Fault Tolerance Zhe Feng1 , Yu Hu1 , Lei He1 and Rupak Angeles ABSTRACT We describe In-Place Reconfiguration (IPR) for LUT-based FPGAs, an algorithm the propagation of faults seen at a pair of comple- mentary inputs. Based on IPR, we develop a fault

He, Lei

364

Performance of Graceful Degradation for Cache Faults Hyunjin Lee Sangyeun Cho Bruce R. Childers  

E-Print Network [OSTI]

Performance of Graceful Degradation for Cache Faults Hyunjin Lee Sangyeun Cho Bruce R. Childers to thermal hot spots) and may man- ifest themselves as operational faults at the micro- Bruce Childers that is dependent on the fault and the frequency of access to an address that would normally be held in the disabled

Cho, Sangyeun

365

What about vulnerability to a fault attack of the Miller algorithm during an  

E-Print Network [OSTI]

What about vulnerability to a fault attack of the Miller algorithm during an Identity Based is to analyse the weakness of the Miller algorithm when it undergoes a fault attack. We prove that the Miller algorithm is vulnerable to a fault attack which is valid in all coordinate systems, through the resolution

Paris-Sud XI, Université de

366

What About Vulnerability to a Fault Attack of the Miller's Algorithm During an  

E-Print Network [OSTI]

What About Vulnerability to a Fault Attack of the Miller's Algorithm During an Identity Based of this article is to analyse the weakness of the Miller's algorithm when it undergoes a fault attack. We prove that the Miller's algorithm is vulnerable to a fault attack which is valid in all coordinate systems, through

Paris-Sud XI, Université de

367

Shallow soil CO2 flow along the San Andreas and Calaveras Faults, California  

E-Print Network [OSTI]

Shallow soil CO2 flow along the San Andreas and Calaveras Faults, California J. L. Lewicki,1,2 W. C soil CO2 survey along the San Andreas fault (SAF) in Parkfield, and the Calaveras fault (CF) in Hollister, California, in the context of spatial and temporal variability, origin, and transport of CO2

Hilley, George

368

Yield Modeling and Analysis of a Clockless Asynchronous Wave Pipeline with Pulse Faults  

E-Print Network [OSTI]

Yield Modeling and Analysis of a Clockless Asynchronous Wave Pipeline with Pulse Faults T. Feng fault model and its modeling and analysis methods in a clockless asynchronous wave pipeline fault rate model for establishing a sound theoretical foundation for clockless wave pipeline design

Ayers, Joseph

369

Acoustic Emission, Cylinder Pressure and Vibration: A Multisensor Approach to Robust Fault Diagnosis \\Lambda  

E-Print Network [OSTI]

of a diesel engine and 4 fault conditions, Artificial Neural Nets based on data from any one of these three and challenging task for Artificial Neural Nets (ANNs) is the on­line fault dia­ gnosis of a diesel engine. One way of meeting this challenge is to physically induce faults in a diesel engine, to collect data

Sharkey, Amanda

370

Mineralogical characterization of protolith and fault rocks from the SAFOD Main Hole  

E-Print Network [OSTI]

Mineralogical characterization of protolith and fault rocks from the SAFOD Main Hole John G. Solum influence is not yet fully known. Faults containing these mineralogical phases are prime candidates), Mineralogical characterization of protolith and fault rocks from the SAFOD Main Hole, Geophys. Res. Lett., 33, L

371

Environmental technologies program, Fiscal year 1994  

SciTech Connect (OSTI)

This document presents details of the technology that is currently being demonstrated at the Hanford Site. The program is testing technology for cost and time savings in the following clean-up areas: detection and characterization; soil and ground water remediation; remote handling; waste minimization; and high-level, low-level, and mixed waste treatment. This document also contains a technology integration section.

NONE

1994-12-31T23:59:59.000Z

372

Technology in water conservation  

E-Print Network [OSTI]

be accomplished with instruments a#22;ached to pipelines at manholes. #27;ese devices ?listen? to the water #16;ow in the pipe; when they detect the characteristic sound of a leak, they report by radio to permanent or mobile collection points. Even a small... leak can be detected. Rainwater catchment may be a good way to replace water from other potable sources. In some situations, this involves using the simple technology of capturing rainfall runo#21; from a roof or another surface. In a hot, dry...

Finch, Dr. Calvin

2013-01-01T23:59:59.000Z

373

Technology '90  

SciTech Connect (OSTI)

The US Department of Energy (DOE) laboratories have a long history of excellence in performing research and development in a number of areas, including the basic sciences, applied-energy technology, and weapons-related technology. Although technology transfer has always been an element of DOE and laboratory activities, it has received increasing emphasis in recent years as US industrial competitiveness has eroded and efforts have increased to better utilize the research and development resources the laboratories provide. This document, Technology '90, is the latest in a series that is intended to communicate some of the many opportunities available for US industry and universities to work with the DOE and its laboratories in the vital activity of improving technology transfer to meet national needs. Technology '90 is divided into three sections: Overview, Technologies, and Laboratories. The Overview section describes the activities and accomplishments of the DOE research and development program offices. The Technologies section provides descriptions of new technologies developed at the DOE laboratories. The Laboratories section presents information on the missions, programs, and facilities of each laboratory, along with a name and telephone number of a technology transfer contact for additional information. Separate papers were prepared for appropriate sections of this report.

Not Available

1991-01-01T23:59:59.000Z

374

Development and Application of Nonlinear PCA for Fault  

E-Print Network [OSTI]

Development and Application of Nonlinear PCA for Fault Diagnosis in Internal Combustion Engines Uwe to an Internal Combustion Engine · Conclusions and Future Challenges #12;Slide 3 Uwe Kruger Development Kruger School of Electronics, Electrical Engineering & Computer Science Ashby Building Stranmillis Road

Gorban, Alexander N.

375

Electrical faults modeling of the photovoltaic generator Wail Rezgui1  

E-Print Network [OSTI]

Electrical faults modeling of the photovoltaic generator Wail Rezgui1 , LeĂŻla-Hayet Mouss1 , Kinza is captured by the generator and direct electrical energy resulting from the conversion of the solar radiation of a problem at the generator. Practically, the existence of electrical defects on this type of systems can

Boyer, Edmond

376

Test Case Purification for Improving Fault Localization Jifeng Xuan  

E-Print Network [OSTI]

Test Case Purification for Improving Fault Localization Jifeng Xuan INRIA Lille - Nord Europe Lille on the execution trace of test cases. Failing test cases and their assertions form test oracles for the failing behavior of the system under analysis. In this paper, we propose a novel concept of spectrum driven test

377

Statistical Approaches to Fault Analysis in Multivariate Process Control  

E-Print Network [OSTI]

Statistical Approaches to Fault Analysis in Multivariate Process Control Richard D. De Veaux Lyle H Abstract After a brief review of some statistical approaches to multivariate process control, we present analysis or partial least squares to limit the number of latent variables to study. While using historical

Ungar, Lyle H.

378

Influence of plastic deformation on bimaterial fault rupture directivity  

E-Print Network [OSTI]

Influence of plastic deformation on bimaterial fault rupture directivity Nora DeDontney,1 Elizabeth of the role of the stress state on the distribution of plastic deformation and the direction of preferred in determining the location of plastic deformation. For different orientations, plastic deformation can

Dmowska, Renata

379

On Fault Coverage of Tests for Finite State Specifications  

E-Print Network [OSTI]

On Fault Coverage of Tests for Finite State Specifications A. Petrenko and G. v. Bochmann-Ville, Montréal (Québec), H3C 3J7, Canada Abstract Testing is a trade-off between increased confidence in the correctness of the implementation under test and constraints on the amount of time and effort that can

von Bochmann, Gregor

380

Motion and evolution of the Chaochou Fault, Southern Taiwan  

E-Print Network [OSTI]

has been called the Chuchi Transfer Fault Zone (Lacombe et al., 2001). This boundary represents a major change in the character of seismicity in Taiwan. Although the nature of this boundary is not known, it may represent the southern extent of direct...

Hassler, Lauren E.

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Fault-tolerant architecture for quantum computation using electrically controlled  

E-Print Network [OSTI]

ARTICLES Fault-tolerant architecture for quantum computation using electrically controlled an architecture for quantum computation using electrically controlled semiconductor spins by extending the Loss in the solid state. Here, we develop a scalable architecture for solid-state quantum computation based

Loss, Daniel

382

Fracture surface energy of the Punchbowl fault, San Andreas system  

E-Print Network [OSTI]

Fracture surface energy of the Punchbowl fault, San Andreas system Judith S. Chester1 , Frederick M. Chester1 & Andreas K. Kronenberg1 Fracture energy is a form of latent heat required to create weakening1­3 . Fracture energy has been estimated from seismological and experimental rock deformation data4

Chester, Frederick M.

383

High voltage fault current limiter having immersed phase coils  

DOE Patents [OSTI]

A fault current limiter including: a ferromagnetic circuit formed from a ferromagnetic material and including at least a first limb, and a second limb; a saturation mechanism surrounding a limb for magnetically saturating the ferromagnetic material; a phase coil wound around a second limb; a dielectric fluid surrounding the phase coil; a gaseous atmosphere surrounding the saturation mechanism.

Darmann, Francis Anthony

2014-04-22T23:59:59.000Z

384

Module Placement for Fault-Tolerant Microfluidics-Based Biochips  

E-Print Network [OSTI]

Module Placement for Fault-Tolerant Microfluidics-Based Biochips FEI SU and KRISHNENDU CHAKRABARTY Duke University Microfluidics-based biochips are soon expected to revolutionize clinical diagnosis, DNA sequencing, and other laboratory procedures involving molecular biology. Most microfluidic biochips today

Chakrabarty, Krishnendu

385

Real Time Control Design for Mobile Robot Fault Tolerant Control.  

E-Print Network [OSTI]

Mobile Robot. Cristian Axenie Automation and Industrial Informatics Department Razvan Solea, Lecturer, Ph-time distributed control application with fault tolerance capabilities for differential wheeled mobile robots mobile robot the author has been able to develop a hierarchical software application that minimizes costs

Kuehnlenz, Kolja

386

Fault Tolerance on Interleaved inverter with Magnetic couplers  

E-Print Network [OSTI]

Fault Tolerance on Interleaved inverter with Magnetic couplers K.Guépratte, D.Frey, P-O.Jeannin, H Electrical Engineering (G2Elab), Thales Systemes Aeroportes Abstract- The paper focuses on a new control strategy for improving the availability of power electronic converters based on interleaved structures

Paris-Sud XI, Université de

387

Defects and Faults in Quantum Cellular Automata at Nano Scale  

E-Print Network [OSTI]

Defects and Faults in Quantum Cellular Automata at Nano Scale Mehdi Baradaran Tahoori, Mariam considerable research on quantum dot cellular automata (QCA) as a new computing scheme in the nano, quantum dot cellular automata (QCA) not only gives a solution at nano scale, but also it offers a new

388

Proceedings of the 18th Fault-Tolerant Computing Symposium  

E-Print Network [OSTI]

Proceedings of the 18th Fault-Tolerant Computing Symposium Tokyo, Japan, pp. 234-239, June 1988 performed on this erroneous information are ``undone'' using a hardware mechanism for fast rollback of a few and confine the damage caused by the error to the failed module, it is often necessary to check the outputs

Tamir, Yuval

389

This document contains 3087 words. FAULT-TOLERANT COMPUTING  

E-Print Network [OSTI]

or physical damage. An extensive methodology has been developed in this field over the past thirty years the annual IEEE International Symposium on Fault-Tolerant Computing (FTCS) and the papers in its Digests with protective redundancy so that, if the module fails, others can assume its function. Special mechanisms

Rennels, David A.

390

Combining Tools for the Verification of FaultTolerant Systems  

E-Print Network [OSTI]

and verification of fault­tolerant systems according to the invent&verify paradigm. Our method is based on the CSP specifications (CSP process terms), refinement relations or combinations of these three description formalisms specification paradigms ac­ cording to the specific needs of each development step is essential to cope

Peleska, Jan - Fachbereich 3

391

Fault prediction in aircraft engines using Self-Organizing Maps  

E-Print Network [OSTI]

Fault prediction in aircraft engines using Self- Organizing Maps Marie Cottrell1 , Patrice Gaubert1. Aircraft engines are designed to be used during several tens of years. Their maintenance is a challenging and costly task, for obvious security reasons. The goal is to ensure a proper operation of the engines

Paris-Sud XI, Université de

392

Condition Assessment and Fault Prognostics of Microelectromechanical Systems  

E-Print Network [OSTI]

Condition Assessment and Fault Prognostics of Microelectromechanical Systems K. Medjaher , H. Skima-Mechatronic Systems Department 24, rue Alain Savary, 25000 Besançon, France Abstract Microelectromechanical systems to microelectromechanical systems (MEMS), since these latter devices undergo failures during their life- time. However

Paris-Sud XI, Université de

393

Wind Energy Conversion Systems Fault Diagnosis Using Wavelet Analysis  

E-Print Network [OSTI]

Wind Energy Conversion Systems Fault Diagnosis Using Wavelet Analysis Elie Al-Ahmar1,2 , Mohamed El, induction generator, Discrete Wavelet Transform (DWT), failure diagnosis. I. Introduction Wind energy the condition of induction machines. Fig. 1. Worldwide growth of wind energy installed capacity [1]. 1 E. Al

Paris-Sud XI, Université de

394

How to Generate Fault Trees from Causal In uence Diagrams  

E-Print Network [OSTI]

. 1 #12; Hydrocarbon in Steam in Catalyst in Vent 1 Vent 2 Product out Tank Pressure controller Handbook [VGRH81], written by some of the original developers of fault tree methodology in the nuclear; Explosion Pressure too high PRV 1 does not open PRV 2 does not open Valve failure Operator does not know

Ladkin, Peter B.

395

RIVERTON DOME GAS EXPLORATION AND STIMULATION TECHNOLOGY DEMONSTRATION, WIND RIVER BASIN, WYOMING  

SciTech Connect (OSTI)

The new exploration technology for basin center gas accumulations developed by R.C. Surdam and Associates at the Institute for Energy Research, University of Wyoming, was applied to the Riverton Dome 3-D seismic area. Application of the technology resulted in the development of important new exploration leads in the Frontier, Muddy, and Nugget formations. The new leads are adjacent to a major north-south trending fault, which is downdip from the crest of the major structure in the area. In a blind test, the drilling results from six new Muddy test wells were accurately predicted. The initial production values, IP, for the six test wells ranged from < one mmcf/day to four mmcf/day. The three wells with the highest IP values (i.e., three to four mmcf/day) were drilled into an intense velocity anomaly (i.e., anomalously slow velocities). The well drilled at the end of the velocity anomaly had an IP value of one mmcf/day, and the two wells drilled outside of the velocity anomaly had IP values of < one mmcf/day and are presently shut in. Based on these test results, it is concluded that the new IER exploration strategy for detecting and delineating commercial, anomalously pressured gas accumulation is valid in the southwestern portions of the Wind River Basin, and can be utilized to significantly reduce exploration risk and to increase profitability of so-called basin center gas accumulations.

Ronald C. Surdam; Zunsheng Jiao; Nicholas K. Boyd

1999-11-01T23:59:59.000Z

396

Thrust faulting in Temblor Range, Kern County, California  

SciTech Connect (OSTI)

Surface and subsurface studies confirm the presence of overthrusting in the Temblor Range between Gonyer Canyon and Recruit Pass. In the subsurface, three wells have penetrated the Cree fault, the Hudbay Cree' No. 1 (7,300 ft), the Frantzen Oil Company Cree' No. 1 (5,865 ft) and the Arco Cree Fee' 1A well (5,915 ft). Below the fault, 25 to 35{degree} of westerly dips on the west flank of the sub-thrust Phelps anticline are encountered. The McDonald section below the fault is comprised of siliceous fractured shale which contains live oil and gas showings. A drill-stem test of the interval from 8,247 to 8,510 ft in the Frantzen well resulted in a recovery of 1,200 ft clean 34{degree} oil and 40 MCF per day gas. The shut in pressure was 3,430 lb, which is a normal hydrostatic pressure common to the producing structures in the southern San Joaquin Valley. The equivalent of this interval has produced over 7,000 bbl of oil in the Arco Cree' 1A well. The Arco Cree Fee' No. 1A well crossed the axis of the Phelps Anticline as indicated by good dipmeter and bottomed in Lower Zemorrian at 14,512 ft total depth. This well was not drilled deep enough to reach the Point of Rocks Sand and did not test the gas showings in the lower Miocene section. In the Gonyer Canyon area, subsurface evidence indicated conditions are similar to those in the Cree area because a large structure is present below a thrust fault. It is believed that significant accumulations will be found beneath thrust faults in the eastern part of the Temblor Range where conditions are similar to those that were instrumental in forming fields such as the Elk Hills, B. V. Hills, Belgian Anticline and others.

Simonson, R.R.

1991-02-01T23:59:59.000Z

397

Controlled-source electromagnetic mapping of a faulted sandstone aquifer in central Texas  

E-Print Network [OSTI]

across a fault (Randolph 1991), due to permeability reduction in the deformation zone, but in some cases can be enhanced along the fault slip plane (Antonellini and Aydin 1994), i. e. parallel to the fault. A knowledge of subsurface fault distributions... the electromagnetic response. Seaborne et al. (1979) interpreted the anomalies as the edge effect of thin horizontal sheets of low resistivity beds, as opposed to the high conductivity response of the material in a fault zone. In a similar study, Hazell er al...

Gorman, Erin Margaret

2012-06-07T23:59:59.000Z

398

Model based detection of hydrogen leaks in a fuel cell stack Ari Ingimundarson and Anna G. Stefanopoulou and Denise McKay  

E-Print Network [OSTI]

Model based detection of hydrogen leaks in a fuel cell stack Ari Ingimundarson and Anna G. Stefanopoulou and Denise McKay Abstract-- Hydrogen leaks are potentially dangerous faults in fuel cell systems detection, leak detection, hydrogen leak- age. I. INTRODUCTION A common safety concern for fuel cell systems

Stefanopoulou, Anna

399

Fault-tolerant corrector/detector chip for high-speed data processing  

DOE Patents [OSTI]

An internally fault-tolerant data error detection and correction integrated circuit device and a method of operating same is described. The device functions as a bidirectional data buffer between a 32-bit data processor and the remainder of a data processing system and provides a 32-bit datum with a relatively short eight bits of data-protecting parity. The 32-bits of data by eight bits of parity is partitioned into eight 4-bit nibbles and two 4-bit nibbles, respectively. For data flowing towards the processor the data and parity nibbles are checked in parallel and in a single operation employing a dual orthogonal basis technique. The dual orthogonal basis increase the efficiency of the implementation. Any one of ten (eight data, two parity) nibbles are correctable if erroneous, or two different erroneous nibbles are detectable. For data flowing away from the processor the appropriate parity nibble values are calculated and transmitted to the system along with the data. The device regenerates parity values for data flowing in either direction and compares regenerated to generated parity with a totally self-checking equality checker. As such, the device is self-validating and enabled to both detect and indicate an occurrence of an internal failure. A generalization of the device to protect 64-bit data with 16-bit parity to protect against byte-wide errors is also presented. 8 figures.

Andaleon, D.D.; Napolitano, L.M. Jr.; Redinbo, G.R.; Shreeve, W.O.

1994-03-01T23:59:59.000Z

400

Fault-tolerant corrector/detector chip for high-speed data processing  

DOE Patents [OSTI]

An internally fault-tolerant data error detection and correction integrated circuit device (10) and a method of operating same. The device functions as a bidirectional data buffer between a 32-bit data processor and the remainder of a data processing system and provides a 32-bit datum is provided with a relatively short eight bits of data-protecting parity. The 32-bits of data by eight bits of parity is partitioned into eight 4-bit nibbles and two 4-bit nibbles, respectively. For data flowing towards the processor the data and parity nibbles are checked in parallel and in a single operation employing a dual orthogonal basis technique. The dual orthogonal basis increase the efficiency of the implementation. Any one of ten (eight data, two parity) nibbles are correctable if erroneous, or two different erroneous nibbles are detectable. For data flowing away from the processor the appropriate parity nibble values are calculated and transmitted to the system along with the data. The device regenerates parity values for data flowing in either direction and compares regenerated to generated parity with a totally self-checking equality checker. As such, the device is self-validating and enabled to both detect and indicate an occurrence of an internal failure. A generalization of the device to protect 64-bit data with 16-bit parity to protect against byte-wide errors is also presented.

Andaleon, David D. (San Ramon, CA); Napolitano, Jr., Leonard M. (Danville, CA); Redinbo, G. Robert (Davis, CA); Shreeve, William O. (Fayetteville, NY)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Analysis of Fault Permeability Using Mapping and Flow Modeling, Hickory Sandstone Aquifer, Central Texas  

SciTech Connect (OSTI)

Reservoir compartments, typical targets for infill well locations, are commonly created by faults that may reduce permeability. A narrow fault may consist of a complex assemblage of deformation elements that result in spatially variable and anisotropic permeabilities. We report on the permeability structure of a km-scale fault sampled through drilling a faulted siliciclastic aquifer in central Texas. Probe and whole-core permeabilities, serial CAT scans, and textural and structural data from the selected core samples are used to understand permeability structure of fault zones and develop predictive models of fault zone permeability. Using numerical flow simulation, it is possible to predict permeability anisotropy associated with faults and evaluate the effect of individual deformation elements in the overall permeability tensor. We found relationships between the permeability of the host rock and those of the highly deformed (HD) fault-elements according to the fault throw. The lateral continuity and predictable permeability of the HD fault elements enhance capability for estimating the effects of subseismic faulting on fluid flow in low-shale reservoirs.

Nieto Camargo, Jorge E., E-mail: jorge.nietocamargo@aramco.com; Jensen, Jerry L., E-mail: jjensen@ucalgary.ca [University of Calgary, Department of Chemical and Petroleum Engineering (Canada)

2012-09-15T23:59:59.000Z

402

Sequence Alignment for Masquerade Detection Scott E. Coull1  

E-Print Network [OSTI]

, however, these state-of-the-art security technologies are rendered useless. For instance, once a user has, administrators rely on security technologies such as firewalls, network and host-based intrusion detection technologies. Clearly, such attacks pose a serious threat, and their detection often occurs long after

Bystroff, Chris

403

Los Alamos Team Demonstrates Bottle Scanner Technology  

ScienceCinema (OSTI)

Los Alamos scientists are demonstrating a Nuclear Magnetic Resonance Imaging (NMR) technology that may provide a breakthrough for screening liquids at airport security. By adding low-power X-ray data to the NMR mix, scientists believe they have unlocked a new detection technology. Funded in part by the Department of Homeland Security's Science and Technology Directorate, the new technology is called MagRay.

Espy, Michelle; Schultz, Larry

2014-06-02T23:59:59.000Z

404

Los Alamos Team Demonstrates Bottle Scanner Technology  

SciTech Connect (OSTI)

Los Alamos scientists are demonstrating a Nuclear Magnetic Resonance Imaging (NMR) technology that may provide a breakthrough for screening liquids at airport security. By adding low-power X-ray data to the NMR mix, scientists believe they have unlocked a new detection technology. Funded in part by the Department of Homeland Security's Science and Technology Directorate, the new technology is called MagRay.

Espy, Michelle; Schultz, Larry

2014-05-06T23:59:59.000Z

405

FUEL CELL TECHNOLOGIES PROGRAM Technologies  

E-Print Network [OSTI]

and fuel cells offer great promise for our energy future. Fuel cell vehicles are not yet commercially, such as a hydrogen fueling station or hydrogen fuel cell vehicle. Technology validation does not certify, and the Federal Government to evaluate hydrogen fuel cell vehicle and infrastructure technologies together in real

406

Detection of pump degradation  

SciTech Connect (OSTI)

This Phase II Nuclear Plant Aging Research study examines the methods of detecting pump degradation that are currently employed in domestic and overseas nuclear facilities. This report evaluates the criteria mandated by required pump testing at U.S. nuclear power plants and compares them to those features characteristic of state-of-the-art diagnostic programs and practices currently implemented by other major industries. Since the working condition of the pump driver is crucial to pump operability, a brief review of new applications of motor diagnostics is provided that highlights recent developments in this technology. The routine collection and analysis of spectral data is superior to all other technologies in its ability to accurately detect numerous types and causes of pump degradation. Existing ASME Code testing criteria do not require the evaluation of pump vibration spectra but instead overall vibration amplitude. The mechanical information discernible from vibration amplitude analysis is limited, and several cases of pump failure were not detected in their early stages by vibration monitoring. Since spectral analysis can provide a wealth of pertinent information concerning the mechanical condition of rotating machinery, its incorporation into ASME testing criteria could merit a relaxation in the monthly-to-quarterly testing schedules that seek to verify and assure pump operability. Pump drivers are not included in the current battery of testing. Operational problems thought to be caused by pump degradation were found to be the result of motor degradation. Recent advances in nonintrusive monitoring techniques have made motor diagnostics a viable technology for assessing motor operability. Motor current/power analysis can detect rotor bar degradation and ascertain ranges of hydraulically unstable operation for a particular pump and motor set. The concept of using motor current or power fluctuations as an indicator of pump hydraulic load stability is presented.

Greene, R.H.; Casada, D.A.; Ayers, C.W. [and others

1995-08-01T23:59:59.000Z

407

A survey of early warning technologies  

SciTech Connect (OSTI)

This paper presents a survey of technologies useful in providing early warning in physical security systems. Early warning is important in virtually all types of security systems whether they are used for temporary (tactical, portable, or semi-permanent) applications, border warning, fixed-site detection, or standoff surveillance detection. With the exception of the standoff surveillance detection systems, all systems discussed in this paper usually involve a moving target. The fact that a person(s) to be detected in a standoff surveillance scenario is not moving presents challenging problems and requires different applications of technology. The technologies commonly used to detect moving targets and some suggestions for detection of stationary targets are addressed in this paper.

Smith, G.D.; Arlowe, H.D.; Williams, J.D.

1995-07-01T23:59:59.000Z

408

Mechanical properties and fabric of the Punchbowl fault zone, California  

E-Print Network [OSTI]

) identification of source rocks and sediment transport directions for sedimentary rock units (Larsen, 1959; Pelka, 1971; Robinson and Woodburne, 1971; Woodburne and Golz, 1972; Farley and Ehlig, 1977; Barrows, 1979), and (3) regional mapping and correlation... at Santa Barbara Chairman of Advisory Committee: John M. Logan Field observations and experimental rock deformation techniques are used to characterize the deformational fabric and relative mechanical properties of a portion of the Punchbowl fault zone...

Chester, Frederick Michael

1983-01-01T23:59:59.000Z

409

Fault-tolerant quantum computing with color codes  

E-Print Network [OSTI]

We present and analyze protocols for fault-tolerant quantum computing using color codes. We present circuit-level schemes for extracting the error syndrome of these codes fault-tolerantly. We further present an integer-program-based decoding algorithm for identifying the most likely error given the syndrome. We simulated our syndrome extraction and decoding algorithms against three physically-motivated noise models using Monte Carlo methods, and used the simulations to estimate the corresponding accuracy thresholds for fault-tolerant quantum error correction. We also used a self-avoiding walk analysis to lower-bound the accuracy threshold for two of these noise models. We present and analyze two architectures for fault-tolerantly computing with these codes: one with 2D arrays of qubits are stacked atop each other and one in a single 2D substrate. Our analysis demonstrates that color codes perform slightly better than Kitaev's surface codes when circuit details are ignored. When these details are considered, we estimate that color codes achieve a threshold of 0.082(3)%, which is higher than the threshold of $1.3 \\times 10^{-5}$ achieved by concatenated coding schemes restricted to nearest-neighbor gates in two dimensions but lower than the threshold of 0.75% to 1.1% reported for the Kitaev codes subject to the same restrictions. Finally, because the behavior of our decoder's performance for two of the noise models we consider maps onto an order-disorder phase transition in the three-body random-bond Ising model in 2D and the corresponding random-plaquette gauge model in 3D, our results also answer the Nishimori conjecture for these models in the negative: the statistical-mechanical classical spin systems associated to the 4.8.8 color codes are counterintuitively more ordered at positive temperature than at zero temperature.

Andrew J. Landahl; Jonas T. Anderson; Patrick R. Rice

2011-08-29T23:59:59.000Z

410

Cockade breccia: Product of mineralisation along dilational faults  

E-Print Network [OSTI]

. Geological Society of America, Washington, D.C. 548 Bateman, A.M., 1924. Angular inclusions and replacement deposits. Economic Geology 19, 504–549 520. 550 Beck, R., 1903. Lehre von den Erzlagerstätten. 2nd Ed., Gebrüder Bornträger, Berlin. 551 Bélissont... Date: 6 June 2014 Revised Date: 29 August 2014 Accepted Date: 2 September 2014 Please cite this article as: Frenzel, M., Woodcock, N.H., Cockade breccia: Product of mineralisation along dilational faults, Journal of Structural Geology (2014), doi: 10...

Frenzel, Max; Woodcock, Nigel H.

2014-01-01T23:59:59.000Z

411

Gravity and fault structures, Long Valley caldera, California  

SciTech Connect (OSTI)

The main and catastrophic phase of eruption in Long Valley occurred 0.73 m.y. ago with the eruption of over 600 km/sup 3/ of rhyolitic magma. Subsequent collapse of the roof rocks produced a caldera which is now elliptical in shape, 32 km east-west by 17 km north-south. The caldera, like other large Quarternary silicic ash-flow volcanoes that have been studied by various workers, has a nearly coincident Bouguer gravity low. Earlier interpretations of the gravity anomaly have attributed the entire anomaly to lower density rocks filling the collapsed structure. However, on the basis of many additional gravity stations and supporting subsurface data from several new holes, a much more complex and accurate picture has emerged of caldera structure. From a three-dimensional inversion of the residual Bouguer gravity data we can resolve discontinuities that seem to correlate with extensions of pre-caldera faults into the caldera and faults associated with the ring fracture. Some of these faults are believed related to the present-day hydrothermal upflow zone and the zone of youngest volcanic activity within the caldera.

Carle, S.F.; Goldstein, N.E.

1987-07-01T23:59:59.000Z

412

Superconducting fault current-limiter with variable shunt impedance  

DOE Patents [OSTI]

A superconducting fault current-limiter is provided, including a superconducting element configured to resistively or inductively limit a fault current, and one or more variable-impedance shunts electrically coupled in parallel with the superconducting element. The variable-impedance shunt(s) is configured to present a first impedance during a superconducting state of the superconducting element and a second impedance during a normal resistive state of the superconducting element. The superconducting element transitions from the superconducting state to the normal resistive state responsive to the fault current, and responsive thereto, the variable-impedance shunt(s) transitions from the first to the second impedance. The second impedance of the variable-impedance shunt(s) is a lower impedance than the first impedance, which facilitates current flow through the variable-impedance shunt(s) during a recovery transition of the superconducting element from the normal resistive state to the superconducting state, and thus, facilitates recovery of the superconducting element under load.

Llambes, Juan Carlos H; Xiong, Xuming

2013-11-19T23:59:59.000Z

413

Available Technologies  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program Cumulus Humilis,Technologies Available Technologies

414

PAVEMENT TECHNOLOGY UPDATE This Technology Transfer Program  

E-Print Network [OSTI]

PAVEMENT TECHNOLOGY UPDATE This Technology Transfer Program publication is funded by the Division to them in California. TECHNOLOGY TRANSFER PROGRAM MAY 2011, VOL. 3, NO. 1 California's Transition

California at Berkeley, University of

415

Method and apparatus for generating motor current spectra to enhance motor system fault detection  

DOE Patents [OSTI]

A method and circuitry for sampling periodic amplitude modulations in a nonstationary periodic carrier wave to determine frequencies in the amplitude modulations. The method and circuit are described in terms of an improved motor current signature analysis. The method insures that the sampled data set contains an exact whole number of carrier wave cycles by defining the rate at which samples of motor current data are collected. The circuitry insures that a sampled data set containing stationary carrier waves is recreated from the analog motor current signal containing nonstationary carrier waves by conditioning the actual sampling rate to adjust with the frequency variations in the carrier wave. After the sampled data is transformed to the frequency domain via the Discrete Fourier Transform, the frequency distribution in the discrete spectra of those components due to the carrier wave and its harmonics will be minimized so that signals of interest are more easily analyzed.

Linehan, Daniel J. (Knoxville, TN); Bunch, Stanley L. (Oak Ridge, TN); Lyster, Carl T. (Knoxville, TN)

1995-01-01T23:59:59.000Z

416

Multi-sensor Wireless System for Fault Detection in Induction Motors  

E-Print Network [OSTI]

be achieved with preventive maintenance through conditionAt a same time, preventive maintenance of motors helps the

Tarkesh Esfahani, Ehsan

2012-01-01T23:59:59.000Z

417

Development of New Whole Building Fault Detection and Diagnosis Techniques for Commissioning Persistence  

E-Print Network [OSTI]

commercially available tools with whole building FDD capability: Facility Explorer, Performance and Continuous Re-commissioning Analysis 12 Tool (PACRAT), and Whole...

Lin, Guanjing

2012-12-07T23:59:59.000Z

418

Method and apparatus for generating motor current spectra to enhance motor system fault detection  

DOE Patents [OSTI]

A method and circuitry are disclosed for sampling periodic amplitude modulations in a nonstationary periodic carrier wave to determine frequencies in the amplitude modulations. The method and circuit are described in terms of an improved motor current signature analysis. The method insures that the sampled data set contains an exact whole number of carrier wave cycles by defining the rate at which samples of motor current data are collected. The circuitry insures that a sampled data set containing stationary carrier waves is recreated from the analog motor current signal containing nonstationary carrier waves by conditioning the actual sampling rate to adjust with the frequency variations in the carrier wave. After the sampled data is transformed to the frequency domain via the Discrete Fourier Transform, the frequency distribution in the discrete spectra of those components due to the carrier wave and its harmonics will be minimized so that signals of interest are more easily analyzed. 29 figs.

Linehan, D.J.; Bunch, S.L.; Lyster, C.T.

1995-10-24T23:59:59.000Z

419

Detection and Estimation of Multiple Fault Profiles Using Generalized Likelihood Ratio  

E-Print Network [OSTI]

]. The EPS supplies power to spacecraft systems and pay- loads. The EPS schematic in Figure 1 shows a battery connected to a load bank through a set of switches, cir- cuit breakers and an inverter. Since the dynamics

Koutsoukos, Xenofon D.

420

Fault Detection and Diagnostics for Non-Intrusive Monitoring Using Motor Harmonics  

E-Print Network [OSTI]

Harmonic analysis of motor current has been used to track the speed of motors for sensorless control. Algorithms exist that track the speed of a motor given a dedicated stator current measurement, for example. Harmonic ...

Orji, Uzoma A.

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Comparison of Chiller Models for Use in Model-Based Fault Detection  

E-Print Network [OSTI]

, and computational requirements. The objective of this study was to evaluate different modeling approaches for their applicability to model based FDD of vapor compression chillers. Three different models were studied: the Gordon and Ng Universal Chiller model (2nd...

Sreedhara, P.; Haves, P.

2001-01-01T23:59:59.000Z

422

A Comparison of Fault Detection Methods For a Transcritical Refrigeration System  

E-Print Network [OSTI]

on Climate Change, eleven of the twelve years between 1995 and 2006 ranked with the highest temperatures since direct measurement has been available [3]. The use of hydroflourocarbons (HFCs) as refrigerants contributes to climate change. Global warming...

Janecke, Alex Karl

2012-10-19T23:59:59.000Z

423

Using Program Mutation for the Empirical Assessment of Fault Detection Techniques: A Comparison of  

E-Print Network [OSTI]

. Unfortunately, developing correct con- current code is more difficult than developing correct sequential code in the proceedings of the 2nd Workshop on Mutation Analysis (Mutation 2006) [BCD06a, BCD06b]. In Chapter 6-authored with my super- visors [BCD07]. For all three papers I was the primary author and conducted the research

Bradbury, Jeremy S.

424

Development of an Automated Fault Detection and Diagnosis tool for AHU's  

E-Print Network [OSTI]

method. AFDD is a key means of achieving automated commissioning with many AFDD projects now in the implementation phase from their initial research and development [4]. IEA Annex 47 [7] reviewed the operation of 18 such tools, concluding... commissioning of a HVAC system into one demonstration study, savings of 44% of electricity consumption and 78% of gas consumption over a ten year period have been proven by the International Energy Agency (IEA) Annex 47, DABO Case Study[7], [8]. Building...

Bruton, K.; Raftery, P.; Aughney, N.; Keane, M.; O'Sullivan, D.

2012-01-01T23:59:59.000Z

425

Fault detection system for distribution lines using a DSP for filtering and data manipulation  

E-Print Network [OSTI]

. Originally, the energy algorithm was interested in the 2-10kHz range; however, it has been modified to deal with the odd harmonic (180, 300, 420, . . . ), even harmonic( 120, 240, 360, . . . ), and non-harmonic (30, 90, 150, . . . ) energy values less than... 1200 Hz [23, 26]. -Randomness algorithm: counts the number of changes from high to low energy in the 2-6 kHz range of current. Various other frequencies plan to be tested in the future [5, 8]. -Arcing Burst Pattern Analysis algorithm: recognizes a...

Schultz, Kevin L

1991-01-01T23:59:59.000Z

426

Fault Detection and Isolation in Low-Voltage DC Distribution System -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicy andExsolutionFES6FYRANDOMOverview The652 PleaseHydrocarbons

427

Sandia National Laboratories: Sandia Research on PV Arc-Fault Detection  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted for US Patent ClimateECEnergyComputational Modeling &

428

Fault Detection and Diagnosis in TurbineEngines using Fuzzy Logic  

E-Print Network [OSTI]

with in-flight shutdowns, delays and cancellations, unscheduled engine removals, and take-off aborts engine monitoring and diagnosis. First, many engine problems are not distinguishable or even visible

Gayme, Dennice

429

An expert system for fault section diagnosis of power systems using fuzzy relations  

SciTech Connect (OSTI)

This paper proposes an expert system using fuzzy relations to deal with uncertainties imposed on fault section diagnosis of power systems. The authors build sagittal diagrams which represent the fuzzy relations for power systems, and diagnose fault sections using the sagittal diagrams. Next, they examine the malfunction or wrong alarm of relays and circuit breakers based on the alarm information and the estimated fault section. The proposed system provides the fault section candidates in terms of the degree of membership and the malfunction or wrong alarm. An operator monitors these candidates and is able to diagnose the fault section, coping with uncertainties. Experimental studies for real power systems reveal usefulness of the proposed technique to diagnose faults that have uncertainty.

Cho, H.J. [LG Electronics Research Center, Seoul (Korea, Republic of); Park, J.K. [Seoul National Univ. (Korea, Republic of). Dept. of Electrical Engineering

1997-02-01T23:59:59.000Z

430

Effect of HVDC line faults on transient torsional torques of turbine-generator shafts  

SciTech Connect (OSTI)

This paper investigates the effects of HVdc line faults, line de-energization, and line re-energization on the transient torsional stresses of steam turbine-generator (T-G) units. The studies are conducted on a bipole HVdc system which connects a T-G set to a large ac system. The shaft transient stresses of the T-G set as a result of HVac line fault, fault clearing, and automatic reclosure are also determined when the HVdc transmission system is replaced by an equivalent double-line HVac system. The EMTDC program is used for the simulation studies. The studies conclude that transient shaft stresses as a result of HVdc line fault and its subsequent switching events are (1) significantly less severe than those of HVac faults and subsequent switchings, and (2) not sensitive to the fault location and disturbance duration.

Shi, W. (Xi'an Jiaotong Univ. (China). Dept. of Electrical Engineering); Iravani, M.R. (Univ. of Toronto, Ontario (Canada). Dept. of Electrical Engineering)

1994-08-01T23:59:59.000Z

431

A High-Resolution Aeromagnetic Survey to Identify Buried Faults at Dixie Valley, Nevada  

SciTech Connect (OSTI)

Preliminary results from a high-resolution aeromagnetic survey (200m line spacing) acquired in Dixie Valley early in 2002 provide confirmation of intra-basin faulting based on subtle surface indications. In addition the data allow identification of the locations and trends of many faults that have not been recognized at the surface, and provide a picture of intrabasin faulting patterns not possible using other techniques. The data reveal a suite of northeasterly-trending curving and branching faults that surround a relatively coherent block in the area of Humboldt Salt Marsh, the deepest part of the basin. The producing reservoir occurs at the north end of this coherent block, where rampart faults from the northwest side of the valley merge with anthithetic faults from the central and southeast parts of the valley.

Smith, Richard Paul; Grauch, V. J. S.; Blackwell, David D.

2002-09-01T23:59:59.000Z

432

automated intrusion detection: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CLASS FILES, VOL. 1, NO. 11, NOVEMBER 2002 1 Hi-DRA: Intrusion Detection for Internet Security Computer Technologies and Information Sciences Websites Summary: for Internet...

433

acquisition intrusion detection: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Next Page Last Page Topic Index 1 Security Intrusion & Detection Security Intrusion Computer Technologies and Information Sciences Websites Summary: intrusions, log suspicious...

434

adaptive intrusion detection: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Last Page Topic Index 1 Adaptive Model Generation for Intrusion Detection Systems Computer Technologies and Information Sciences Websites Summary: Adaptive Model Generation for...

435

Influence of faults on groundwater flow and transport at YuccaMountain, Nevada  

SciTech Connect (OSTI)

Numerical simulations of groundwater flow at Yucca Mountain, Nevada are used to investigate how faults influence groundwater flow pathways and regional-scale macrodispersion. The 3-D model has a unique grid block discretization that facilitates the accurate representation of the complex geologic structure present in faulted formations. Each hydrogeologic layer is discretized into a single layer of irregular and dipping grid blocks, and faults are discretized such that they are laterally continuous and varied in displacement varies along strike. In addition, the presence of altered fault zones is explicitly modeled, as appropriate. Simulations show that upward head gradients can be readily explained by the geometry of hydrogeologic layers, the variability of layer permeabilities, and the presence of permeable fault zones or faults with displacement only, not necessarily by upwelling from a deep aquifer. Large-scale macrodispersion results from the vertical and lateral diversion of flow near the contact of high- and low-permeability layers at faults, and from upward flow within high-permeability fault zones. Conversely, large-scale channeling can occur as a result of groundwater flow into areas with minimal fault displacement. Contaminants originating at the water table can flow in a direction significantly different from that of the water table gradient, and isolated zones of contaminants can occur at the water table downgradient. By conducting both 2-D and 3-D simulations, we show that the 2-D cross-sectional models traditionally used to examine flow in faulted formations may not be appropriate. In addition, the influence of a particular type of fault cannot be generalized; depending on the location where contaminants enter the saturated zone, faults may either enhance or inhibit vertical dispersion.

Cohen, Andrew J.B.; Sitar, Nicholas

1999-10-07T23:59:59.000Z

436

Design, Test and Demonstration of Saturable Reactor High-Temperature Superconductor Fault Current Limiters  

SciTech Connect (OSTI)

Zenergy Power has successfully designed, built, tested, and installed in the US electrical grid a saturable reactor Fault Current Limiter. Beginning in 2007, first as SC Power Systems and from 2008 as Zenergy Power, Inc., ZP used DOE matching grant and ARRA funds to help refine the design of the saturated reactor fault current limiter. ZP ultimately perfected the design of the saturated reactor FCL to the point that ZP could reliably design a suitable FCL for most utility applications. Beginning with a very basic FCL design using 1G HTS for a coil housed in a LN2 cryostat for the DC bias magnet, the technology progressed to a commercial system that was offered for sale internationally. Substantial progress was made in two areas. First, the cryogenics cooling system progressed from a sub-cooled liquid nitrogen container housing the HTS coils to cryostats utilizing dry conduction cooling and reaching temperatures down to less than 20 degrees K. Large, round cryostats with â??warm boreâ?ť diameters of 1.7 meters enabled the design of large tanks to hold the AC components. Second, the design of the AC part of the FCL was refined from a six legged â??spiderâ?ť design to a more compact and lighter design with better fault current limiting capability. Further refinement of the flux path and core shape led to an efficient saturated reactor design requiring less Ampere-turns to saturate the core. In conclusion, the development of the saturable reactor FCL led to a more efficient design not requiring HTS magnets and their associated peripheral equipment, which yielded a more economical product in line with the electric utility industry expectations. The original goal for the DOE funding of the ZP project â??Design, Test and Demonstration of Saturable Reactor High-Temperature Superconductor Fault Current Limitersâ?ť was to stimulate the HTS wire industry with, first 1G, then 2G, HTS wire applications. Over the approximately 5 years of ZPâ??s product development program, the amount of HTS wire employed per FCL and its cost as a percentage of the total FCL product content had not dropped substantially from an unsustainable level of more than 50% of the total cost of the FCL, nor had the availability increased (today the availability of 2G wire for commercial applications outside of specific partnerships with the leading 2G wire manufacturers is extremely limited). ZP had projected a very significant commercial potential for FCLs with higher performance and lower costs compared to the initial models built with 1G wire, which would come about from the widespread availability of low-cost, high-performance 2G HTS wire. The potential for 2G wires at greatly reduced performance-based prices compared to 1G HTS conductor held out the potential for the commercial production of FCLs at price and performance levels attractive to the utility industry. However, the price of HTS wire did not drop as expected and today the available quantities of 2G wire are limited, and the price is higher than the currently available supplies of 1G wire. The commercial option for ZP to provide a reliable and reasonably priced FCL to the utility industry is to employ conventional resistive conductor DC electromagnets to bias the FCL. Since the premise of the original funding was to stimulate the HTS wire industry and ZP concluded that copper-based magnets were more economical for the foreseeable future, DOE and ZP decided to mutually terminate the project.

Frank Darmann; Robert Lombaerde; Franco Moriconi; Albert Nelson

2011-10-31T23:59:59.000Z

437

Technology Application Centers: Facilitating Technology Transfer  

E-Print Network [OSTI]

transfer plus technology application. A&C Enercom has learned from experience that technology deployment will not occur unless utilities achieve both technology transfer (e.g, the dissemination of information) and technology application (e.g., the direct...

Kuhel, G. J.

438

SciTech Connect: Development of Asset Fault Signatures for Prognostic...  

Office of Scientific and Technical Information (OSTI)

signatures to assess the health status of generator step-up generators and emergency diesel generators in nuclear power plants. Asset fault signatures describe the distinctive...

439

E-Print Network 3.0 - andreas fault system Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

are approximately three times... OF DEVIATORIC STRESS ALONG THE SAN ANDREAS FAULT B. R. Smith (1), D. T. Sandwell (1) (1) IGPP, Scripps... along the San Andreas system ......

440

E-Print Network 3.0 - algorithmic fault tree Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

based on fault trees derived using the IFT induction algorithm. The test system is a robot arm... University College Galway, Ireland. 12;INDUCTION AND THE IFT ALGORITHM To...

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Microsoft Word - GroundFaultSAND-rev7-JJ.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3459 Unlimited Release Printed June 2013 Photovoltaic Ground Fault and Blind Spot Electrical Simulations Jack D. Flicker Jay Johnson Prepared by Sandia National Laboratories...

442

Wind Power Plant Enhancement with a Fault-Current Limiter: Preprint  

SciTech Connect (OSTI)

This paper investigates the capability of a saturable core fault-current limiter to limit the short circuit current of different types of wind turbine generators.

Muljadi, E.; Gevorgian, V.; DeLaRosa, F.

2011-03-01T23:59:59.000Z

443

E-Print Network 3.0 - achieve fault tolerance Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 This document contains 3087 words. FAULT-TOLERANT COMPUTING Summary: -the-shelf computers and achieved voting and reconfiguration primarily through software. The second...

444

Fault Tolerance Techniques for Wireless Ad Hoc Sensor Networks Farinaz Koushanfar  

E-Print Network [OSTI]

poten- tial to provide inexpensive and pervasive bridge between physical and computational worlds and actuators that have significantly higher fault rates than the traditional semiconductor integrated circuits

445

Finite-difference modeling of faults and fractures Richard T. Coates ...  

E-Print Network [OSTI]

For the purposes of seismic propagation, a slip fault may be regarded as a surface across which the dis- placement caused by a seismic wave is discontinuous.

2010-06-09T23:59:59.000Z

446

E-Print Network 3.0 - atera fault central Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Netherlands ABSTRACT Faults strongly impact groundwater ow... in the unconsolidated sediments of the Lower Rhine Embayment. Hydraulic head maps show that many...

447

Fault-Based Attack of RSA Authentication Andrea Pellegrini, Valeria Bertacco and Todd Austin  

E-Print Network [OSTI]

a straightforward design architecture that en- tails a small silicon footprint and low-power profile. Our research enviromental manipulations. Our fault-based attack can be succ

Austin, Todd M.

448

E-Print Network 3.0 - automatical adaptive fault Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Information Sciences 50 FUSE -A HARDWARE ACCELERATED HDL FAULT INJECTION TOOL Marcus Jeitler, Martin Delvai Summary: the Hpe desk environment has 12;Fig. 3. FuSE...

449

Coulomb stress accumulation along the San Andreas Fault system Bridget Smith and David Sandwell  

E-Print Network [OSTI]

Coulomb stress accumulation along the San Andreas Fault system Bridget Smith and David Sandwell deformation, SCEC velocities, crustal stress Citation: Smith, B., and D. Sandwell, Coulomb stress accumulation

Smith-Konter, Bridget

450

The architecture of a network level intrusion detection system  

SciTech Connect (OSTI)

This paper presents the preliminary architecture of a network level intrusion detection system. The proposed system will monitor base level information in network packets (source, destination, packet size, and time), learning the normal patterns and announcing anomalies as they occur. The goal of this research is to determine the applicability of current intrusion detection technology to the detection of network level intrusions. In particular, the authors are investigating the possibility of using this technology to detect and react to worm programs.

Heady, R.; Luger, G.; Maccabe, A.; Servilla, M. [New Mexico Univ., Albuquerque, NM (United States). Dept. of Computer Science

1990-08-15T23:59:59.000Z

451

Image Mining: Detecting Deforestation Patterns  

E-Print Network [OSTI]

54 Chapter IV Image Mining: Detecting Deforestation Patterns Through Satellites Marcelino Pereira to analyze satellite images and extract knowledge from this kind of data. The Amazonia deforestation problem of change on deforested areas of Amazonia. The purpose of the authors is to present relevant technologies

Camara, Gilberto

452

Science and technology news Nanotechnology  

E-Print Network [OSTI]

environmental exposures affect disease risk," said NIEHS Director Linda Birnbaum, Ph.D. "This paper brings us of Environmental Health Sciences, part of the National Institutes of Health. The new technology is discussed in detecting high exposures to toxic industrial chemicals that pose serious health risks in the workplace

Suslick, Kenneth S.

453

Manufacturing technology  

SciTech Connect (OSTI)

The specific goals of the Manufacturing Technology thrust area are to develop an understanding of fundamental fabrication processes, to construct general purpose process models that will have wide applicability, to document our findings and models in journals, to transfer technology to LLNL programs, industry, and colleagues, and to develop continuing relationships with industrial and academic communities to advance our collective understanding of fabrication processes. Advances in four projects are described here, namely Design of a Precision Saw for Manufacturing, Deposition of Boron Nitride Films via PVD, Manufacturing and Coating by Kinetic Energy Metallization, and Magnet Design and Application.

Blaedel, K.L.

1997-02-01T23:59:59.000Z

454

FEMP/NTDP Technology Focus New Technology  

E-Print Network [OSTI]

FEMP/NTDP Technology Focus New Technology Demonstration Program Technology Focus FEMPFederal Energy Management Program Trends in Energy Management Technology: BCS Integration Technologies ­ Open Communications into a complete EMCIS. The first article [1] covered enabling technologies for emerging energy management systems

455

New technologies for item monitoring  

SciTech Connect (OSTI)

This report responds to the Department of Energy`s request that Sandia National Laboratories compare existing technologies against several advanced technologies as they apply to DOE needs to monitor the movement of material, weapons, or personnel for safety and security programs. The authors describe several material control systems, discuss their technologies, suggest possible applications, discuss assets and limitations, and project costs for each system. The following systems are described: WATCH system (Wireless Alarm Transmission of Container Handling); Tag system (an electrostatic proximity sensor); PANTRAK system (Personnel And Material Tracking); VRIS (Vault Remote Inventory System); VSIS (Vault Safety and Inventory System); AIMS (Authenticated Item Monitoring System); EIVS (Experimental Inventory Verification System); Metrox system (canister monitoring system); TCATS (Target Cueing And Tracking System); LGVSS (Light Grid Vault Surveillance System); CSS (Container Safeguards System); SAMMS (Security Alarm and Material Monitoring System); FOIDS (Fiber Optic Intelligence & Detection System); GRADS (Graded Radiation Detection System); and PINPAL (Physical Inventory Pallet).

Abbott, J.A. [EG & G Energy Measurements, Albuquerque, NM (United States); Waddoups, I.G. [Sandia National Labs., Albuquerque, NM (United States)

1993-12-01T23:59:59.000Z

456

(Environmental technology)  

SciTech Connect (OSTI)

The traveler participated in a conference on environmental technology in Paris, sponsored by the US Embassy-Paris, US Environmental Protection Agency (EPA), the French Environmental Ministry, and others. The traveler sat on a panel for environmental aspects of energy technology and made a presentation on the potential contributions of Oak Ridge National Laboratory (ORNL) to a planned French-American Environmental Technologies Institute in Chattanooga, Tennessee, and Evry, France. This institute would provide opportunities for international cooperation on environmental issues and technology transfer related to environmental protection, monitoring, and restoration at US Department of Energy (DOE) facilities. The traveler also attended the Fourth International Conference on Environmental Contamination in Barcelona. Conference topics included environmental chemistry, land disposal of wastes, treatment of toxic wastes, micropollutants, trace organics, artificial radionuclides in the environment, and the use biomonitoring and biosystems for environmental assessment. The traveler presented a paper on The Fate of Radionuclides in Sewage Sludge Applied to Land.'' Those findings corresponded well with results from studies addressing the fate of fallout radionuclides from the Chernobyl nuclear accident. There was an exchange of new information on a number of topics of interest to DOE waste management and environmental restoration needs.

Boston, H.L.

1990-10-12T23:59:59.000Z

457

Manufacturing technologies  

SciTech Connect (OSTI)

The Manufacturing Technologies Center is an integral part of Sandia National Laboratories, a multiprogram engineering and science laboratory, operated for the Department of Energy (DOE) with major facilities at Albuquerque, New Mexico, and Livermore, California. Our Center is at the core of Sandia`s Advanced Manufacturing effort which spans the entire product realization process.

NONE

1995-09-01T23:59:59.000Z

458

Fingerprint detection  

DOE Patents [OSTI]

A method for detection and visualization of latent fingerprints is provided and includes contacting a substrate containing a latent print thereon with a colloidal metal composition for time sufficient to allow reaction of said colloidal metal composition with said latent print, and preserving or recording the observable print. Further, the method for detection and visualization of latent fingerprints can include contacting the metal composition-latent print reaction product with a secondary metal-containing solution for time sufficient to allow precipitation of said secondary metal thereby enhancing the visibility of the latent print, and preserving or recording the observable print.

Saunders, George C. (Rt. 1, Box 428B, Espanola, NM 87532)

1992-01-01T23:59:59.000Z

459

Vacuum Technology  

SciTech Connect (OSTI)

The environmental condition called vacuum is created any time the pressure of a gas is reduced compared to atmospheric pressure. On earth we typically create a vacuum by connecting a pump capable of moving gas to a relatively leak free vessel. Through operation of the gas pump the number of gas molecules per unit volume is decreased within the vessel. As soon as one creates a vacuum natural forces (in this case entropy) work to restore equilibrium pressure; the practical effect of this is that gas molecules attempt to enter the evacuated space by any means possible. It is useful to think of vacuum in terms of a gas at a pressure below atmospheric pressure. In even the best vacuum vessels ever created there are approximately 3,500,000 molecules of gas per cubic meter of volume remaining inside the vessel. The lowest pressure environment known is in interstellar space where there are approximately four molecules of gas per cubic meter. Researchers are currently developing vacuum technology components (pumps, gauges, valves, etc.) using micro electro mechanical systems (MEMS) technology. Miniature vacuum components and systems will open the possibility for significant savings in energy cost and will open the doors to advances in electronics, manufacturing and semiconductor fabrication. In conclusion, an understanding of the basic principles of vacuum technology as presented in this summary is essential for the successful execution of all projects that involve vacuum technology. Using the principles described above, a practitioner of vacuum technology can design a vacuum system that will achieve the project requirements.

Biltoft, P J

2004-10-15T23:59:59.000Z

460

Waste Management Fault Tree Data Bank (WM): 1992 status report  

SciTech Connect (OSTI)

The Risk Assessment Methodology Group (RAM) of the Nuclear Process Safety Research Section (NPSR) maintains a compilation of incidents that have occurred in the Waste Management facilities. The Waste Management Fault Tree Data Bank (WM) contains more than 35,000 entries ranging from minor equipment malfunctions to incidents with significant potential for injury or contamination of personnel. This report documents the status of the WM data bank including: availability, training, source of data, search options, and usage, to which these data have been applied. Periodic updates to this memorandum are planned as additional data or applications are acquired.

Baughman, D.F.; Hang, P.; Townsend, C.S.

1993-08-30T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Sandia National Laboratories: arc-fault circuit interrupter  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1development Sandia, NREL Release Wavearc-fault circuit interrupter Sandia Research on

462

Detection device  

DOE Patents [OSTI]

The present invention is directed to a detection device comprising: (1) an entrance chamber; (2) a central chamber; and (3) an exit chamber. The central chamber includes an ionizing gas, anode, and means for connecting the anode with an external power supply and pulse counter.

Smith, J.E.

1981-02-27T23:59:59.000Z

463

3rd International Symposium on Advanced Fluid/Solid Science and Technology in Experimental Mechanics, 7-10 December. 2008, Tainan, Taiwan Detection of wave propagation by a nonstationary cross-spectral density technique  

E-Print Network [OSTI]

Mechanics, 7-10 December. 2008, Tainan, Taiwan Detection of wave propagation by a nonstationary cross for the propagation time, and was applied to a shock and a detonation wave. The results show that by including prone to error than the cross-correlation technique. Key words Wave propagation, Cross-spectrum, Time

Texas at Arlington, University of

464

News from the Science and Technology  

E-Print Network [OSTI]

the biggest eye on the sky Fertilising budding ventures through business incubation e-Infrastructure to power and detect if there is a dangerous material inside in less than five seconds. Its impressive detection an object's surface. Taking the technology forward, demonstrating its viability and transforming

465

Hybrid magic state distillation for universal fault-tolerant quantum computation  

E-Print Network [OSTI]

A set of stabilizer operations augmented by some special initial states known as 'magic states', gives the possibility of universal fault-tolerant quantum computation. However, magic state preparation inevitably involves nonideal operations that introduce noise. The most common method to eliminate the noise is magic state distillation (MSD) by stabilizer operations. Here we propose a hybrid MSD protocol by connecting a four-qubit H-type MSD with a five-qubit T-type MSD, in order to overcome some disadvantages of the previous MSD protocols. The hybrid MSD protocol further integrates distillable ranges of different existing MSD protocols and extends the T-type distillable range to the stabilizer octahedron edges. And it provides considerable improvement in qubit cost for almost all of the distillable range. Moreover, we experimentally demonstrate the four-qubit H-type MSD protocol using nuclear magnetic resonance technology, together with the previous five-qubit MSD experiment, to show the feasibility of the hybrid MSD protocol.

Wenqiang Zheng; Yafei Yu; Jian Pan; Jingfu Zhang; Jun Li; Zhaokai Li; Dieter Suter; Xianyi Zhou; Xinhua Peng; Jiangfeng Du

2014-12-11T23:59:59.000Z

466

Abstract-This paper investigates four different short circuit fault conditions which can occur for an inverter-fed perma-  

E-Print Network [OSTI]

for an inverter-fed perma- nent magnet synchronous motor (PMSM) with buried mag- nets. The fault conditions Condition #... Inverter PM machine (at steady state) N Short circuit fault conditions of a buried PMSM

Jantsch, Axel

467

Algorithms for Green Buildings: Learning-Based Techniques for Energy Prediction and Fault Diagnosis  

E-Print Network [OSTI]

Algorithms for Green Buildings: Learning-Based Techniques for Energy Prediction and Fault Diagnosis on servers or to redistribute to lists, requires prior specific permission. #12;Algorithms for Green Buildings: Learning-Based Techniques for Energy Prediction and Fault Diagnosis Daniel Holcomb Wenchao Li

Seshia, Sanjit A.

468

Treanmission Line Fault Location using Interoperability and Integration of Data and Model  

E-Print Network [OSTI]

. The second type is a sparse measurement based fault location scheme using phasor measurements from different substations located in the vicinity where the fault has occurred and can be applied if the measurements are not available from any of the line ends...

Dutta, Papiya

2014-01-10T23:59:59.000Z

469

Methodology for designing the fuzzy resolver for a radial distribution system fault locator  

E-Print Network [OSTI]

The Power System Automation Lab at Texas A&M University developed a fault location scheme that can be used for radial distribution systems. When a fault occurs, the scheme executes three stages. In the first stage, all data measurements and system...

Li, Jun

2006-04-12T23:59:59.000Z

470

nD-RAPID: a multidimensional scalable fault-tolerant optoelectronic  

E-Print Network [OSTI]

nD-RAPID: a multidimensional scalable fault-tolerant optoelectronic interconnection for high of faults. We propose a multidimen- sional optoelectronic architecture, nD-RAPID (reconfigurable, and latency [4­7]. In this paper, we propose a novel optoelectronic architecture nD-RAPID (n Dimen- sional

Louri, Ahmed

471

A Smart Algorithm for the Diagnosis of Short-Circuit Faults in a Photovoltaic Generator  

E-Print Network [OSTI]

A Smart Algorithm for the Diagnosis of Short-Circuit Faults in a Photovoltaic Generator Wail Rezgui observations distributed over classes is used for simulation purposes. Keywords--Photovoltaic generator, SVM, k-NN, short-circuit fault, smart classification, linear programming. NOMENCLATURE PV = Photovoltaic; SVM

Paris-Sud XI, Université de

472

A Regression Algorithm for the Smart Prognosis of a Reversed Polarity Fault in a Photovoltaic Generator  

E-Print Network [OSTI]

A Regression Algorithm for the Smart Prognosis of a Reversed Polarity Fault in a Photovoltaic database containing sample data is used for simulation purposes. Keywords--Photovoltaic generator, SVR, k-NNR, reversed polarity fault, diagnosis, prognosis. NOMENCLATURE PV = Photovoltaic; SVM = Support Vector

Paris-Sud XI, Université de

473

Voltage grid support of DFIG wind turbines during grid faults Anca D. Hansen1  

E-Print Network [OSTI]

Voltage grid support of DFIG wind turbines during grid faults Anca D. Hansen1 , Gabriele Michalke2) wind turbines address primarily the design of DFIG wind turbine control with special focus on power strategy for DFIG wind turbines, which enhances the fault ride-through capability of DFIG wind turbines

474

PWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control  

E-Print Network [OSTI]

PWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control Bekheďra Tabbache proposes a fault-tolerant control scheme for PWM inverter-fed induction motor-based electric vehicles and simulations on an electric vehicle are carried-out using a European urban driving cycle to assess the FTC

Paris-Sud XI, Université de

475

Automated Analysis of Fault-Tolerance in Distributed Systems Scott D. Stoller y  

E-Print Network [OSTI]

Automated Analysis of Fault-Tolerance in Distributed Systems #3; Scott D. Stoller y Computer satisfy in speci#12;ed failure scenarios. Our analysis method is to compute, for each failure scenario for which the user speci#12;ed a fault-tolerance requirement, an MFG representing the system's communication

Schneider, Fred B.

476

Christiaan J.J. Paredis and Pradeep K. Khosla, ``Designing Fault Tolerant Manipulators: How Many Degreesoffreedom?''  

E-Print Network [OSTI]

Degrees­of­freedom?'' to appear in The International Journal of Robotics Research, 1996. Designing Fault design templates for spatial fault tolerant manipulators. In a second approach, both the Cartesian task in their robot designs (Wu et al. 1993). Reliability is also #12; 2 Christiaan J.J. Paredis and Pradeep K. Khosla

477

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems  

E-Print Network [OSTI]

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems. Introduction Model-based evaluation of the reliability of distributed systems has traditionally required expert- proach to analyze the reliability of fault-tolerant distributed systems. More in particular, we want

Newcastle upon Tyne, University of

478

Can Fault Prediction Models and Metrics be Used for Vulnerability Prediction? Yonghee Shin and Laurie Williams  

E-Print Network [OSTI]

Can Fault Prediction Models and Metrics be Used for Vulnerability Prediction? Yonghee Shin to prioritize security inspection and testing efforts may be better served by a prediction model that indicates commonalities that may allow development teams to use traditional fault prediction models and metrics

Young, R. Michael

479

First-principles calculations of twin-boundary and stacking-fault energies in magnesium  

E-Print Network [OSTI]

First-principles calculations of twin-boundary and stacking-fault energies in magnesium Y. Wang and stacking faults in metal magnesium have been calculated using first-principles supercell approach. Four. Keywords: Magnesium; Interfaces; Twinning; First-principles calculation Magnesium alloys are increasingly

Chen, Long-Qing

480

Shallow seismic reflection profile of the Meers fault, Comanche County, Oklahoma  

E-Print Network [OSTI]

.J., The Meers fault tectonic activity in south- western Oklahoma, U. S. Nuclear Regulatory Commission, NUREG ICR-4852, 1-25, A1-A25, 1987. McLean, R., and Stearns, D.W., Fault analysis in the Wichita Mountains [Abs. ], AAPG Bull. 67, 511-512, 1983. Miller...

Myers, Paul B.; Miller, Richard D.; Steeples, Don W.

1987-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "fault detection technology" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

DFIG Driven Wind Turbine Grid Fault-Tolerance Using High-Order Sliding Mode Control  

E-Print Network [OSTI]

DFIG Driven Wind Turbine Grid Fault-Tolerance Using High-Order Sliding Mode Control Mohamed fault-tolerance of a doubly-fed induction generator- based wind turbine using high-order sliding mode mechanical stress on the drive train). Simulations using the NREL FAST code on a 1.5-MW wind turbine

Boyer, Edmond

482

Morphology, displacement, and slip rates along the North Anatolian Fault, Turkey  

E-Print Network [OSTI]

Morphology, displacement, and slip rates along the North Anatolian Fault, Turkey Aure´lia Hubert, Ayazaga, Istanbul, Turkey Received 29 January 2001; revised 8 January 2002; accepted 13 January 2002 the central and eastern North Anatolian Fault (NAF) in Turkey. The NAF total displacement is reevaluated using

Hubert-Ferrari, Aurélia

483

Miocene faulting at plate tectonic velocity in the Himalaya of central Nepal  

E-Print Network [OSTI]

Miocene faulting at plate tectonic velocity in the Himalaya of central Nepal Matthew J. Kohna, Tri-Chandra Campus, Ghantaghar, Kathmandu, Nepal, United States Received 7 April 2004; received (MCT) and affiliated faults in central Nepal. Inferred rates were 1.5F0.9 cm/yr (Langtang Thrust, ~19

484

Off-fault plasticity and earthquake rupture dynamics: 2. Effects of fluid saturation  

E-Print Network [OSTI]

Off-fault plasticity and earthquake rupture dynamics: 2. Effects of fluid saturation Robert C slip-weakening behavior is specified, and the off-fault material is described using an elastic-plastic poroelastoplastic materials with and without plastic dilation. During nondilatant undrained response near

485

A 2D Pseudodynamic Rupture Model Generator for Earthquakes on Geometrically Complex Faults  

E-Print Network [OSTI]

A 2D Pseudodynamic Rupture Model Generator for Earthquakes on Geometrically Complex Faults complexity in the rupture process and resulting ground motion. We present a 2D kinematic rupture generator that emulates the strong dependence of earthquake source parameters on local fault geometry observed in dynamic

Dunham, Eric M.

486

Establishment of the mathematical model for diagnosing the engine valve faults by genetic  

E-Print Network [OSTI]

in a six- cylinders/four-stroke cycle diesel engine, i.e. normal condition, valve-tappet clearance and gas for diagnosing the faults occurring in rotor-bearing system, but current computer programs cannot easily distinguish the orbit shapes automatically. Likewise, when diagnosing the faults in a rolling-element bearing

Fernandez, Thomas

487

Online Model-based Diagnosis for Multiple, Intermittent and Interaction Faults  

E-Print Network [OSTI]

convert, move and process materials or objects. Examples of such systems are printers, refineries. An interaction fault is present if a set of components operating on the same object, damage the object even though each component alone produces non noticeable damage. Introducing interaction faults is much

de Kleer, Johan

488

A nested invocation suppression mechanism for active replication fault-tolerant CORBA  

E-Print Network [OSTI]

1 A nested invocation suppression mechanism for active replication fault-tolerant CORBA Deron Liang. The redundant nested invocation (RNI) problem arises when servers in a replicated group issues nested a mechanism to perform auto-suppression of redundant nested invocation in an active replication fault

Chen, Sheng-Wei

489

A Fully Automated Fault-tolerant System for Distributed Video Processing and Off-site Replication  

E-Print Network [OSTI]

A Fully Automated Fault-tolerant System for Distributed Video Processing and Off-site Replication been a failure-prone tedious operation with an operator needed to babysit the processing and off-site, off-site replication, fault-tolerance, grid, educational research. 1. INTRODUCTION In different fields

Wisconsin at Madison, University of

490

Hydrogeological aspects of fault zones on various scales in the Roer Valley Rift System  

E-Print Network [OSTI]

for an estimate of the micro-scale variation of the hydraulic properties within a fault zone. Additional core on several scales show a variety of hydro- geological aspects of faults. 2. Examples 2.1. The hydraulic can be studied on micro-scal

Bense, Victor

491

Oil and Gas CDT Predicting fault permeability at depth: incorporating natural  

E-Print Network [OSTI]

Oil and Gas CDT Predicting fault permeability at depth: incorporating natural permeability controls on fluid flow in oil and gas reservoirs. Fault zones are composed of many deformation elements will receive 20 weeks bespoke, residential training of broad relevance to the oil and gas industry: 10 weeks

Henderson, Gideon

492

Bayesian network for the characterization of faults in a multivariate process  

E-Print Network [OSTI]

Bayesian network for the characterization of faults in a multivariate process Sylvain VERRON of multivariate processes, we propose an original network structure allowing deciding if a fault is appeared in the process. More, this structure permits the identification of the variables that are responsible (root

Paris-Sud XI, Université de

493

Fault-tolerant Holonomic Quantum Computation in Surface Codes  

E-Print Network [OSTI]

We show that universal holonomic quantum computation (HQC) can be achieved fault-tolerantly by adiabatically deforming the gapped stabilizer Hamiltonian of the surface code, where quantum information is encoded in the degenerate ground space of the system Hamiltonian. We explicitly propose procedures to perform each logical operation, including logical state initialization, logical state measurement, logical CNOT, state injection and distillation,etc. In particular, adiabatic braiding of different types of holes on the surface leads to a topologically protected, non-Abelian geometric logical CNOT. Throughout the computation, quantum information is protected from both small perturbations and low weight thermal excitations by a constant energy gap, and is independent of the system size. Also the Hamiltonian terms have weight at most four during the whole process. The effect of thermal error propagation is considered during the adiabatic code deformation. With the help of active error correction, this scheme is fault-tolerant, in the sense that the computation time can be arbitrarily long for large enough lattice size. It is shown that the frequency of error correction and the physical resources needed can be greatly reduced by the constant energy gap.

Yi-Cong Zheng; Todd A. Brun

2015-02-04T23:59:59.000Z

494

Fault current limiter and alternating current circuit breaker  

DOE Patents [OSTI]

A solid-state circuit breaker and current limiter are disclosed for a load served by an alternating current source having a source impedance, the solid-state circuit breaker and current limiter comprising a thyristor bridge interposed between the alternating current source and the load, the thyristor bridge having four thyristor legs and four nodes, with a first node connected to the alternating current source, and a second node connected to the load. A coil is connected from a third node to a fourth node, the coil having an impedance of a value calculated to limit the current flowing therethrough to a predetermined value. Control means are connected to the thyristor legs for limiting the alternating current flow to the load under fault conditions to a predetermined level, and for gating the thyristor bridge under fault conditions to quickly reduce alternating current flowing therethrough to zero and thereafter to maintain the thyristor bridge in an electrically open condition preventing the alternating current from flowing therethrough for a predetermined period of time. 9 figs.

Boenig, H.J.

1998-03-10T23:59:59.000Z

495

100 Area electrical distribution fault and coordination report  

SciTech Connect (OSTI)

This report documents three-phase and line-to-ground fault values and time overcurrent coordination curves for the electrical utility distribution system located in the 100 Areas. Activities that may improve the coordination of the distribution system have also been identified. An evaluation of system coordination was performed. The results of this evaluation are listed in Appendix B. There are protective devices within the 100 Area distribution system that do not coordinate with one another throughout the Areas. There is also a mis-application of reclosing relays at the 100B Area. The impact of the mis-coordination and incorrect application of reclosing relays is that system selectivity is reduced. Equipment will still be protected against damaging currents, however more equipment will be de-energized than necessary during fault conditions. It is the opinion of the author of this report that the cases of mis-coordination listed above, and in Appendix B, do not significantly degrade the system protection system nor the reliability of the 100 Area distribution system. Therefore, immediate response to correct these problems is not recommended. However, a planned methodology, outlined in an Activity Plan, to correct these problems should be developed and implemented in the near future.

Webber, J.J. [ICF Kaiser Hanford Co., Richland, WA (United States)

1994-09-23T23:59:59.000Z

496

A core-based assessment of the spatial relationship of small faults associated with a basement-controlled, large normal fault in the Hickory Sandstone  

E-Print Network [OSTI]

with reverse-slip, showing associated fault strike, dip polarity and cumulative displacement per foot????????????????????? Page 79 80 81 82 83 84 85 86 87 88 89 xii FIGURE 52 Borehole NNR-8: Distribution of small faults with reverse... they were purged from the ?density? measures???.. 3 Descriptive statistics for sample data (n = 692) of displacement, gouge thickness and corresponding log transforms????????????. 4 Summary statistics for ln displacement of all four grain sizes for a...

Graff, Mitchell C

2006-10-30T23:59:59.000Z

497

Venus Technology Plan Venus Technology Plan  

E-Print Network [OSTI]

Venus Technology Plan May 2014 #12; ii Venus Technology Plan At the Venus Exploration Survey priorities, and (3) develop a Technology Plan for future Venus missions (after a Technology Forum at VEXAG Meeting 11 in November 2013). Here, we present the 2014 Venus Technology Plan

Rathbun, Julie A.

498

Fault tree synthesis for software design analysis of PLC based safety-critical systems  

SciTech Connect (OSTI)

As a software verification and validation should be performed for the development of PLC based safety-critical systems, a software safety analysis is also considered in line with entire software life cycle. In this paper, we propose a technique of software safety analysis in the design phase. Among various software hazard analysis techniques, fault tree analysis is most widely used for the safety analysis of nuclear power plant systems. Fault tree analysis also has the most intuitive notation and makes both qualitative and quantitative analyses possible. To analyze the design phase more effectively, we propose a technique of fault tree synthesis, along with a universal fault tree template for the architecture modules of nuclear software. Consequently, we can analyze the safety of software on the basis of fault tree synthesis. (authors)

Koo, S. R.; Cho, C. H. [Corporate R and D Inst., Doosan Heavy Industries and Construction Co., Ltd., 39-3, Seongbok-Dong, Yongin-Si, Gyeonggi-Do 449-795 (Korea, Republic of); Seong, P. H. [Dept. of Nuclear and Quantum Engineering, Korea Advanced Inst. of Science and Technology, 373-3 Guseong-dong, Yuseong-gu, Daejeon, 305-701 (Korea, Republic of)

2006-07-01T23:59:59.000Z

499

Extreme temperature robust optical sensor designs and fault-tolerant signal processing  

DOE Patents [OSTI]

Silicon Carbide (SiC) probe designs for extreme temperature and pressure sensing uses a single crystal SiC optical chip encased in a sintered SiC material probe. The SiC chip may be protected for high temperature only use or exposed for both temperature and pressure sensing. Hybrid signal processing techniques allow fault-tolerant extreme temperature sensing. Wavelength peak-to-peak (or null-to-null) collective spectrum spread measurement to detect wavelength peak/null shift measurement forms a coarse-fine temperature measurement using broadband spectrum monitoring. The SiC probe frontend acts as a stable emissivity Black-body radiator and monitoring the shift in radiation spectrum enables a pyrometer. This application combines all-SiC pyrometry with thick SiC etalon laser interferometry within a free-spectral range to form a coarse-fine temperature measurement sensor. RF notch filtering techniques improve the sensitivity of the temperature measurement where fine spectral shift or spectrum measurements are needed to deduce temperature.

Riza, Nabeel Agha (Oviedo, FL); Perez, Frank (Tujunga, CA)

2012-01-17T23:59:59.000Z

500

Compression-induced stacking fault tetrahedra around He bubbles in Al  

SciTech Connect (OSTI)

Classic molecular dynamics methods are used to simulate the uniform compression process of the fcc Al containing He bubbles. The formation of stacking fault tetrahedra (SFTs) during the collapse of He bubbles is found, and their dependence on the initial He bubble size (0.6–6?nm in diameter) is presented. Our simulations indicate only elastic deformation in the samples for the He bubble size not more than 2?nm. Instead, increasing the He bubble size, we detect several small SFTs forming on the surface of the He bubble (3?nm), as well as the two intercrossed SFTs around the He bubbles (4–6?nm). All these SFTs are observed to be stable under further compression, though there may appear some SF networks outside the SFTs (5–6?nm). Furthermore, the dynamic analysis on the SFTs shows that the yield pressure keeps a near-linear increase with the initial He bubble pressure, and the potential energy of Al atoms inside the SFTs is lower than outside because of their gliding inwards. In addition, the pressure increments of 2–6?nm He bubbles with strain are less than that of Al, which just provides the opportunity for the He bubble collapse and the SFTs formation. Note that the current work only focuses on the case that the number ratio between He atoms and Al vacancies is 1:1.

Shao, Jian-Li, E-mail: shao-jianli@iapcm.ac.cn; Wang, Pei; He, An-Min [Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China)

2014-10-28T23:59:59.000Z