GRESS (Gradient Enhanced Software System) Version 0. 0 user's manual

Technical Report · Sat Oct 01 04:00:00 EDT 1988

DOI:https://doi.org/10.2172/6683420· OSTI ID:6683420

Horwedel, J. E.; Worley, B. A.; Oblow, E. M.; Pin, F. G.; Wright, R. Q.

The primary objective of this manual is to provide a description of the Gradient Enhanced Software System (GRESS) and to explain how to use GRESS to enhance FORTRAN 77 models for gradient calculation. The use of the Extended Arithmetic Processor (EXAP) as the precompiler for GRESS is presented. A complete description of how to enhance a source code for forward propagation of derivatives using the calculus chain rule is provided. On option, EXAP can be used to generate derivatives and store them on a direct access device for subsequent solution of the numerical adjoint equations. Programming information is also provided to aid in the installation and maintenance of the software.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6683420
• Report Number(s): ORNL/TM-10835; ON: DE89004308
• Country of Publication: United States
• Language: English

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