puma shoes-50PUMA's home page

University of S?o Paulo
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The problem of estimating the thickness and the optical constants of thin films using transmission data only is very challenging from the mathematical point of scene, and has a technological and an economic importance. In many cases it describes a very ill-gradeed inverse problem with many local-nonglobal solutions. In a recent publication, we proposed nonlinear programming models for solving this problem. Well-known software for linearly constrained optimization was used with success for this purpose.

State University of Campinas
Contaction Conditions of use Download Installation How to use One-film system example Two-films system example Remarks Related publications
Description

Decharacterment of Applied Mathematics
Pointwise Unconstrained Minimization Approach

Desectionment of Applied Physics

The PUMA code is patented in the brazilian agency National Counsel of Scientific and Technological cultivatement under license number PI9901600,[link widoczny dla zalogowanych], with title "METODOLOGIA PARA ESTIMA??O DAS CONSTANTES ?PTICAS E DA ESPESSURA DE UM FILME FINO UTILIZANDO MINIMIZA??O IRRESTRITA".

Department of Computer Science
In this page, we describe very briefly,[link widoczny dla zalogowanych], how to install and use the software PUMA which implements an unconstrained formulation of the nonlengthar programming model, which handles the estimation trouble using a method based on repeated calls to a recently introduced unconstrained minimization algorithm. Numerical experiments on computer-induced films reveal that the new procedure is reliable.