New Features
in DOTTM Version 5.0!
DOT Version 5 represents
a significant expansion and enhancement of Versions 4.x. Following is a partial
list of enhancements contained in Version 5.0.
- A few minor
bugs have been removed to make the basic optimization capability more
robust. We have solved thousands of optimization problems in our quest
to make DOT as robust as possible.
- Significant
enhancements have been made to the Sequential Quadratic Programming (SQP)
algorithm (METHOD=3) to improve efficiency and robustness. We have made
major changes in the memory allocation routines to allow for the solution
of larger problems.
- The subroutine
DOT510, which estimates memory requirements, has been greatly expanded.
Now DOT510 provides minimum, desired and maximum memory needs. The interactive
program, DTSTOR, includes this new information.
- If NRWK is input
to DOT and contains more storage than the “desired" amount, the additional
storage will be allocated to gradient storage and direction-finding calculations.
- If the number
of active and violated constraints exceeds available memory, DOT will
reduce the retained set and attempt to continue with the optimization
process.
- Estimates of
the Lagrange multipliers are now provided at the end of the optimization.
These are stored in the first NCON locations of the WK array.
For more information
please contact sales@vrand.com
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