Optimum Run

 Optimization Method

Choice

Select Golden Intersection, Simplex, Hooke-Jeeves or Genetic Algorithm.  See Description above for more details.

Number of REAL Variables to Control in this Optimization

INTEGER

Literal

Enter the number of REAL variables to control (maximum 20).

This input is disabled if Optimization Method | Golden Intersection is selected.

Number of INTEGER Variables to Control in This Optimization

INTEGER

Literal

Enter the number of INTEGER variables to control (maximum 20).

This input is enabled only if Optimization Method | Genetic Algorithm is selected.

Number of LOGICAL Variables to Control in this Optimization

INTEGER

Literal

Enter the number of LOGICAL variables to control (maximum 20).

This input is enabled only if Optimization Method | Genetic Algorithm is selected.

Maximum Number of Multiple Runs

INTEGER

Literal

Enter the maximum number of runs allowed if the specified Tolerance is not reached (maximum 10000).

Tolerance

REAL

Literal

Enter the Objective Function tolerance which needs to be satisfied before the optimization is abandoned.  

At the last time step of each run, the component stores a single value for the Objective Function.  These values are compared between runs and the simulation is stopped if the difference is less than the tolerance.

This Optimum Run Enabled or Disabled?

Choice

Select Enabled or Disabled.

 Search Method

Choice

Select Interval Search or Auto Search.

If Interval Search is selected, the search interval is pre-specified (i.e. Left and Right Hand Point).  Whereas Auto Search seeks out a minimum search interval, starting from an initial point.  Once this search interval is found, a regular interval search is performed.

Left Hand Point

REAL

Literal

Enter the start point of the search interval.

This input is enabled only if Search Method | Interval Search is selected.

Right Hand Point

REAL

Literal

Enter the end point of the search interval.

This input is enabled only if Search Method | Interval Search is selected.

Starting Point

REAL

Literal

Enter the initial starting point to seek out a minimum search interval.

This input is enabled only if Search Method | Auto Search is selected.

Initial Step Length

REAL

Literal

Enter the initial step length to be taken while performing an Auto Search.

This input is enabled only if Search Method | Auto Search is selected.

Step Elongation Factor

REAL

Literal

Enter a factor to elongate the step length.  This helps the algorithm to converge to the correct point once the initial search direction is determined.

This input is enabled only if Search Method | Auto Search is selected.

Search Interval Boundary

REAL

Literal

Enter the value of the search interval boundary.

This input is enabled only if Search Method | Auto Search is selected.

 Initial Step Size

REAL

Literal

This value is used to determine all other points of the simplex object.

Step Reduction Factor

REAL

Literal

Enter a factor to help speed up convergence to the optimum point.

This input is enabled only if Optimization Method | Hookes-Jeeves is selected.

Initial Condition for Variables

REAL

Literal

Specify the initial conditions of the simplex object (i.e. the initial component output values).

 Initial Population

INTEGER

Literal

Enter the initial population of the search space.  A larger initial population will increase the likelihood of the optimization space being searched evenly.

Population of the Surviving Generation

INTEGER

Literal

Enter the population of the surviving generations.  This number of chromosomes will be chosen form the Initial Population.  This value is kept constant throughout the process

Population of the Mating Pool

INTEGER

Literal

Enter the population of the mating pool

Binary Mutation Rate

REAL

Literal

This value determines the number of chromosomes taking part in mutation.

Real part Mutation Rate

REAL

Literal

This value determines the number of chromosomes taking part in mutation.

Pairing Method

Choice

Select Top to Bottom, Random, Rank Weighting, Cost Weighting or Tournament.

 Lower/Upper Limits of Variable

REAL

Literal

Enter the lower and upper limits of each variable

 Number of States for Integer Value

INTEGER

Literal

Minimum value is 3.  The output will change between 0 and N-1, N being the number of states specified. If the actual value increment between states is not uniform, then user should model a lookup table to translate values from 0:N-1 to the required values. If the number of states is less than 3 (i.e. 2) then it should be modeled as a binary variable.

 Write Output File?

Choice

Select Yes or No to write an output text file.

Output File

Text

Enter a name for the output file if Write Output File? | Yes is selected.