| Main Title |
Application of Automatic Differentiation for Studying the Sensitivity of Numerical Advection Schemes in Air Quality Models. |
| Author |
Hwang, D. ;
Byun, D. W. ;
|
| CORP Author |
MCNC, Research Triangle Park, NC. North Carolina Supercomputing Center. ;National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
| Publisher |
1995 |
| Year Published |
1995 |
| Report Number |
EPA/600/A-95/053; |
| Stock Number |
PB95-218905 |
| Additional Subjects |
Air quality ;
Sensitivity ;
Computerized simulation ;
Advection ;
Mathematical models ;
Wind velocity ;
Fortran ;
Environmental transport ;
Air flow ;
Equations of motion ;
Differential equations ;
Air pollution ;
Comparison ;
ADIFOR(Automatic Differentiation in FORtran) ;
Brute-force method
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB95-218905 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
10p |
| Abstract |
In any simulation model, knowing the sensitivity of the system to the model parameters is of utmost importance. As part of an effort to build a multiscale air quality modeling system for a high performance computing and communication (HPCC) environment, the authors are exploring an automatic differentiation technique, Automatic Differentiation in FORtran (ADIFOR), for studying systematic model sensitivities. Instead of coding derivatives manually, one can apply ADIFOR without having to have an intimate knowledge of the algorithms implemented in a model. Also, most of the time, ADIFOR generates derivative code that follows the optimization schemes in the model. In this paper, we summarize the results from applying two sensitivity methods, ADIFOR and the brute-force method, to various advection schemes in air quality models. |
| Supplementary Notes |
Presented at the Society for Computer Simulation, 1995 SCS Simulation Multiconference, Phoenix, AZ., April 9-13, 1995. Prepared in cooperation with National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
| NTIS Title Notes |
Symposium proceedings. |
| Category Codes |
68A; 55B |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
521404170 |
| Origin |
NTIS |
| Type |
CAT |
