Do I need to normalize input parameters to Particle Swarm Optimization?

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Buddhi Wimarshana
Buddhi Wimarshana 2022 年 8 月 8 日
コメント済み: Buddhi Wimarshana 2022 年 8 月 8 日
Hi there,
If the optimizing parameters are in different magnitudes of orders, do I need to scale the upper and lower bounds of the parameters to a scale lilke [1,0]? or does PSO actually do it internally?
Many thanks

回答 (1 件)

Alan Weiss
Alan Weiss 2022 年 8 月 8 日
You don't usually need to scale your parameters, but many problems are solved more reliably if you do. See Center and Scale Your Problem. I would first try to solve the problem without centering and scaling, and then center and scale if the solver doesn't converge well.
Alan Weiss
MATLAB mathematical toolbox documentation
  1 件のコメント
Buddhi Wimarshana
Buddhi Wimarshana 2022 年 8 月 8 日
Thanks Alan, I am not sure if PSO does it internally, I found this particular phrase,
For u1 and u2 uniformly (0,1) distributed random vectors of length nvars, update the velocity
v = W*v + y1*u1.*(p-x) + y2*u2.*(g-x).
mentioned in here PSO Algorithm.
Any thoughts on this? didn't quite get what u1 and u2 are on the article...


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