variable_neighborhood_search
Percentage of evaluations to do to escape local minima.
Specification
Alias: None
Arguments: REAL
Default: 0.0
Description
The variable_neighborhood_search keyword is used to set the
percentage (in decimal form) of function evaluations used to escape
local minima. The mesh adaptive direct search method will try to
perform a maximum of that percentage of the function evaluations
within this more extensive search.
Default Behavior
By default, variable_neighborhood_search is not used.
Usage Tips
Using variable_neighborhood_search results in an increased number
of function evaluations. If the desired result is a local minimum,
the added cost is of little or no value, so the recommendation is not
to use it. If the desired result is the best local minimum possible
within a computational budget, then there is value in setting this
parameter. Note that the higher the value, the greater the
computational cost. The value should be no greater than 1.0.
Examples
The following example shows the syntax used to set
variable_neighborhood_search.
method
mesh_adaptive_search
seed = 1234
variable_neighborhood_search = 0.1
