GRESS adjoint matrix reduction algorithms
Conference
·
· Transactions of the American Nuclear Society; (United States)
OSTI ID:5374832
- Oak Ridge National Laboratory, TN (USA)
GRESS is an efficient automated software system for calculating sensitivities of model results to input data in existing FORTRAN 77 computer models. The GRESS ADGEN option calculates first derivatives of selected model results with respect to an almost unlimited number of data by applying the adjoint method; however, data storage has been a major limiting factor. The data storage requirement for an ADGEN application was more than 322 Mbytes for a code that executes in 1 min on a VAX 8600 computer. The purpose of this paper is to describe two new algorithms that dramatically reduce the data storage requirement and execution time for application of the ADGEN option.
- OSTI ID:
- 5374832
- Report Number(s):
- CONF-891103--
- Conference Information:
- Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 60
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ALGORITHMS
COMPUTER CALCULATIONS
COMPUTER CODES
COMPUTERIZED SIMULATION
DATA BASE MANAGEMENT
FORTRAN
G CODES
MANAGEMENT
MATHEMATICAL LOGIC
MEMORY MANAGEMENT
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
PHYSICS
POWER PLANTS
PROGRAMMING
PROGRAMMING LANGUAGES
REACTOR PHYSICS
SENSITIVITY
SIMULATION
THERMAL POWER PLANTS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ALGORITHMS
COMPUTER CALCULATIONS
COMPUTER CODES
COMPUTERIZED SIMULATION
DATA BASE MANAGEMENT
FORTRAN
G CODES
MANAGEMENT
MATHEMATICAL LOGIC
MEMORY MANAGEMENT
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
PHYSICS
POWER PLANTS
PROGRAMMING
PROGRAMMING LANGUAGES
REACTOR PHYSICS
SENSITIVITY
SIMULATION
THERMAL POWER PLANTS