Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title ISIM3D: An ANSI-C Three-Dimensional Multiple Indicator Conditional Simulation Program.
Author Gomex-Hernandez, J. J. ; Srivastava, R. M. ;
CORP Author Stanford Univ., CA. Dept. of Applied Earth Sciences.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher c1990
Year Published 1990
Report Number EPA-R81499; EPA/600/J-90/359;
Stock Number PB91-163733
Additional Subjects Earth sciences ; Mathematical models ; Statistical analysis ; Computerized simulation ; Data file ; Kriging ; Variance(Statistics) ; Stochastic processes ; Monte Carlo method ; Conditional probability ; Algorithms ; Three dimensional models ; Computer programs ; Reprints ; ISIM3D computer program
Library Call Number Additional Info Location Last
NTIS  PB91-163733 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/13/1991
Collation 50p
The indicator conditional simulation technique provides stochastic simulations of a variable that (1) honor the initial data and (2) can feature a richer family of spatial structures not limited by Gaussianity. The data are encoded into a series of indicators which then are used to estimate the conditional probability distribution (cpdf) of the variable under study at any unsampled location. Once the cpdf has been estimated, any particular simulated value is obtained by straightforward Monte-Carlo drawing. Each new simulated value is included in the conditioning data set so that the next simulated values at other locations be conditioned to it. The technique has the advantage over other more traditional techniques such as the turning bands method in that it is not multiGaussian related. The user has full control of the bivariate (2-point) statistics imposed on the simulated field instead of controlling a mere covariance model. The source code is provided in C according to the ANSI standard. (Copyright (c) 1990 Pergamon Press plc.)