Syntax >>>> USER Parent Command all third-level commands in block > OBSERVATION Subcommand – Description Observed data can be represented as a user-specified function of time. The function must be coded into subroutine USERDATA, file it2user.f. The following is the header of subroutine USERDATA, describing the transfer variables. File it2user.f must be recompiled …
Syntax >> OUTPUT Parent Command > COMPUTATION Subcommand >>> BENCHMARK >>> CHARACTERISTIC >>> COVARIANCE >>> FORMAT >>> LIST >>> JACOBIAN >>> NEW OUTPUT >>> OBJECTIVE >>> PERFORMANCE >>> PLOTFILE >>> PLOTTING >>> RESOLUTION >>> SENSITIVITY >>> time_unit >>> UPDATE >>> RESIDUAL >>> VERSION >>> WORTH Description This command specifies the format and amount of printout …
Syntax >>> BENCHMARK Parent Command >> OUTPUT Subcommand – Description A short benchmark calculation is performed, and the CPU time used is compared to that on a reference machine, and a printout is generated with information about approximate relative computer performance. Example > COMPUTATION >> OUTPUT >>> perform BENCHMARK calculation <<< On output: Computer is …
Syntax >>>> SEQUENTIAL Parent Command >>> SELECT Subcommand – Description This command defines one of the criteria used for automatic parameter selection. It examines and ranks the potential of a parameter to reduce the objective function based on the sensitivity coefficient: dD = |delta S|where (delta S) is the change of the objective function …
Syntax >>>> SHIFT: shift (TIME (time_unit)) Parent Command all third-level commands in block > OBSERVATION Subcommand – Description This command shifts data values or observation times by a known, constant value shift. The effect of this command is a direct data manipulation which must be distinguished from estimating an unknown constant that shifts …
Syntax >>> WORTH (PARAMETER/PREDICTION) (DETERMINANT/TRACE) (SET) Parent Command >> OUTPUT Subcommand – Description The data-worth analysis is available whenever the Jacobian matrix and estimation or prediction covariance matrices are evaluated (i.e., for sensitivity analysis and derivative-based optimization). However, since the analysis may be costly if many observations or data sets are involved, it is only …
Syntax >>> RESIDUAL Parent Command >> OUTPUT Subcommand – Description This command prints the observed and calculated system response as well as the residuals after each iTOUGH2 iteration. By default, the residuals are printed only once at the end of the optimization. Example > COMPUTATION >> OUTPUT >>> print RESIDUALs after each TOUGH2 …
Syntax >>> time_unit or as a keyword to any command requesting time units Parent Command >> OUTPUT Subcommand – Description This command or keyword specifies the time units of all times in the iTOUGH2 output and plot files. Admissible time units are SECOND (default), MINUTE, HOUR, DAY, WEEK, MONTH, and YEAR. The time output unit …
Syntax >>> SENSITIVITY Parent Command >> OUTPUT Subcommand – Description This command prints the sensitivity matrix to the iTOUGH2 output file. The elements of the sensitivity matrix are the partial derivatives of the system response at the observation points with respect to the parameters: By default, iTOUGH2 prints the scaled Jacobian matrix, the elements of …
Syntax >>> RESOLUTION Parent Command >> OUTPUT Subcommand – Description Prints model (parameter) and data resolution matrices to a file with extension .res. The data resolution matrix indicates how well the model predictions are resolved, i.e., to what extent they are an average of (usually neighboring) observations. Note that for overdetermined inverse problems, the model …