A web-based tool to evaluate the iterative processes of direct search methods

• Author(s): Mestre, Pedro ; Correia, Aldina ; Matias, João ; Teixeira, Christophe ; Almeida, José ; Serôdio, Carlos
• Date: 2011
• Persistent ID: http://hdl.handle.net/10400.22/4068
• Origin: Repositório Científico do Instituto Politécnico do Porto
• Subject(s): Nonlinear optimization; Direct search methods; Java
• Document Type: Conference Object
• Language: English

Description

Constrained and unconstrained Nonlinear Optimization Problems often appear in many engineering areas. In some of these cases it is not possible to use derivative based optimization methods because the objective function is not known or it is too complex or the objective function is non-smooth. In these cases derivative based methods cannot be used and Direct Search Methods might be the most suitable optimization methods. An Application Programming Interface (API) including some of these methods was implemented using Java Technology. This API can be accessed either by applications running in the same computer where it is installed or, it can be remotely accessed through a LAN or the Internet, using webservices. From the engineering point of view, the information needed from the API is the solution for the provided problem. On the other hand, from the optimization methods researchers’ point of view, not only the solution for the problem is needed. Also additional information about the iterative process is useful, such as: the number of iterations; the value of the solution at each iteration; the stopping criteria, etc. In this paper are presented the features added to the API to allow users to access to the iterative process data.