hgprieto

Syntax >>>> ITERATION: iter Parent Command >>> SELECT Subcommand – Description This command defines the number of iterations after which the criteria for automatic parameter selection is reevaluated (see commands >>>> CORRELATION and >>>> SENSITIVITY). A full Jacobian matrix is evaluated every multiple of iter iterations. In intermediate iterations, only the columns of the Jacobian […]

Syntax >>>> IMMOBILIZATION (: ofredmin) Parent Command >>> SELECT Subcommand – Description Employs “Temporary Parameter Immobilization” [Skahill and Doherty, J. Hydrol., 329, 122-139, 2006] (also referred to as “Automatic User Intervention”) if the Levenberg-Marquardt algorithm is used. Insensitive parameters are fixed if the reduction in the objective function is less than ofredmin (default = 10%).

Syntax >>>> CORRELATION: (-)rcorr Parent Command >>> SELECT Subcommand – Description This command defines one of the criteria used for automatic parameter selection. It examines the ratio between the apparent conditional standard deviation sigma* and the joint standard deviation sigma as a measure of overall parameter correlation (since the calculation is performed far from the

Syntax >>> SELECT or >>> SUPER Parent Command >> OPTION Subcommand >>>> CORRELATION >>>> EIGENVALUE >>>> ITERATION >>>> LIST >>>> SENSITIVITY >>>> SEQUENTIAL >>>> TRUNCATE Description This command invokes the automatic parameter selection option of iTOUGH2. The parameters defined in block > PARAMETER are screened according to two selection criteria (see commands >>>> SENSITIVITY and

Syntax >>> QUADRATIC-LINEAR: c Parent Command >> OPTION Subcommand – Description This command selects a quadratic-linear objective function. Given this estimator, the objective function to be minimized is a combination of least-squares for small residuals and the first norm for residuals larger than c-times the prior standard deviation: where with This objective function does not

Syntax >>> PVM: nhosts (SLEEP: isleep) (FILE: node-file) ((AGGRESSIVE) LEVENBERG (ALL PROCESSORS / PROCESSORS: nprocslm)) HOST1PVM hostname_1 HOST2PVM hostname_2 … … HOSTnhostsPVM hostname_nhosts Parent Command >> OPTION Subcommand – Description The number of hosts nhosts is provided on the command line, followed by nhosts lines containing the keyword *HOSTihostPVM* (ihost = 1,…, nhosts) and the

Syntax >>> PARALLEL: ncores (ROOT: root_directory) (SLEEP: isleep) ((AGGRESSIVE) LEVENBERG (ALL PROCESSORS / PROCESSORS: ncoreslm)) Parent Command >> OPTION Subcommand – Description Allows embarrassingly parallel execution of forward simulations on multi-core machines. The number of cores ncores is provided on the command line. Message passing occurs through temporary files; the root directory for these files

Syntax >>>> TEMPLATE: num-template-files Parent Command >>> PEST Subcommand – Description iTOUGH2 capabilities can be applied to non-TOUGH2 models using the PEST interface. Template files are used to communicate between iTOUGH2 parameters and the input variables of the user-supplied model, which must be provided through one or multiple ASCII text files. (Note that if the

Syntax >>>> PRECISION: SINGLE/DOUBLE Parent Command >>> PEST Subcommand – Description iTOUGH2 capabilities can be applied to non-TOUGH2 models using the PEST interface. The >>>> PRECISION command determines whether single or double precision protocol is to be observed in writing parameter values. Unless a parameter space is greater than 13 characters in width it has

Syntax >>>> INSTRUCTION: num-instruction-files (NO DELETE) Parent Command >>> PEST Subcommand – Description iTOUGH2 capabilities can be applied to non-TOUGH2 models using the PEST interface. Instruction files are used to communicate between the output variables of the user-supplied model (which must be provided through one or multiple ASCII text files) and the iTOUGH2 observation vector.