Nonmonotone adaptive trust region method based on simple conic model for unconstrained optimization

Abstract

We propose a nonmonotone adaptive trust region method based on simple conic model for unconstrained optimization. Unlike traditional trust region methods, the subproblem in our method is a simple conic model, where the Hessian of the objective function is approximated by a scalar matrix. The trust region radius is adjusted with a new self-adaptive adjustment strategy which makes use of the information of the previous iteration and current iteration. The new method needs less memory and computational efforts. The global convergence and Q-superlinear convergence of the algorithm are established under the mild conditions. Numerical results on a series of standard test problems are reported to show that the new method is effective and attractive for large scale unconstrained optimization problems.

Keywords

Nonmonotone technique / conic model / trust region method / large scale optimization / global convergence

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg