You Position: Home > Paper

The Contraction-Expansion Algorithm and Its Use in Fitting Nonlinear Equation

( views:150, downloads:0 )
Author:
No author available
Journal Title:
JOURNAL OF BIOMATHEMATICS
Issue:
4
DOI:
No doi available
Key Word:
Optimization algorithm;nonlinear equation;fitting;contraction-expansion algorithm

Abstract: A new optimization method, contraction-expansion algorithm, is developed and applied to fit nonlinear equations. Five points with equal distance are allocated in the given initial intervals, then the algorithm searches for the points of better objective function one round after another, with contracting and expanding intervals alternatively.The step length (l), a critical factor to optimal solution, is determined and adjusted by feedback information of the searching process. The experiments with number of simulated and real data sets show that the new algorithm is much easier to the optimization than other methods. The algorithm does not need to provide derivatives of the equation.This algorithm can also be used in other optimization problems.

WanfangData CO.,Ltd All Rights Reserved
About WanfangData | Contact US
Healthcare Department, Fuxing Road NO.15, Haidian District Beijing, 100038 P.R.China
Tel:+86-010-58882616 Fax:+86-010-58882615 Email:yiyao@wanfangdata.com.cn