Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!ut-emx!tivoli!alan
From: alan@tivoli.UUCP (Alan R. Weiss)
Newsgroups: comp.software-eng
Subject: Re: Brand New Optimization Software
Message-ID: <794@tivoli.UUCP>
Date: 31 May 91 17:12:29 GMT
References: <91149.152946EC13@LIVERPOOL.AC.UK>
Reply-To: alan@tivoli.UUCP (Alan R. Weiss)
Organization: Tivoli Systems Inc., Austin, TX
Lines: 61

In article <91149.152946EC13@LIVERPOOL.AC.UK> EC13@LIVERPOOL.AC.UK writes:
>
>The most popular vector optimization methods are: the weighting objective
>functions method & constraint method. Although they are good but have some
>disadvantages known to people work on that subject.

Is it just me, or did I miss some commas in these sentences?

>  Two new vector optimization methods have been developed, based on Shannon's
>informational entropy. They have some unique properties which no other
>method does:
>
>1) It minimizes the prohibitive level of time needed to generate the
>whole Pareto solutions.
>
>2) It gives Pareto solutions arranged in order with respect to one
>of the objectives.
>
>   Because of that, discovering the performance-performance space, performance
>-design space and design-design space becomes obtainable which is very
>important in real-world problems, particularly eng. design problems.

Say what?  Or, for us anglophiles amongst us, "I beg your pardon?"

>   On the other hand, two new single-criteria minimization methods, also
>based on Shannon's entropy. They seek to eliminate the following problems:
>
>(i) The solution obtained is heavily dependent on the starting solution;
>and
>
>(ii) The methods often converge to inferior local optima.

Nothing like converging to inferior local optima to make my day.


>All these methods are COMPUTER PROGRAMMABLE and solutions can be generated
>automatically.

Useful, since Pareto analysis is very dull by hand.

>The four methods have been applied successfully to solve problems in fields
>like eng. design, production planning, and mathematics.
>
>A. Sultan

Would you care to give us examples, or are you content to simply
make the claim and let it lie fallow?  Case studies would be nice.

Forgive me if I sound rude, but I understood not a whit of your
gesticulating vernacular (i.e., I didn't get the point).


Is it just me?

_______________________________________________________________________
Alan R. Weiss                           TIVOLI Systems, Inc.
E-mail: alan@tivoli.com                 6034 West Courtyard Drive,
E-mail: alan@whitney.tivoli.com	        Suite 210
Voice : (512) 794-9070                  Austin, Texas USA  78730
Fax   : (512) 794-0623
_______________________________________________________________________