Mesoscale alongstream speed changes of the Gulf Stream are diagnosed from an array of current meters at depths 400, 700, and 1000 m, near 688W, during the development of steep [ratio of ‘‘amplitude’’ to ‘‘wavelength’’ O(1)] meanders. Speed maxima (jet streaks) are generally found between trough and crest axes in steep meanders with local speed minima near the trough and crest axes. Speed change...

W. Huang, J. M. Sullivan Mechanical Engineering Dept., Worcester Polytechnic Institute, Worcester, MA, United States Introduction Aligning multiple medical image volume sets for a composite fMRI analysis is a time consuming process. [1] Conventional gradient-search registration strategies are foiled frequently due to the presence of numerous local minima. In this article an automatic registrati...

The basic idea of local search is to find a good local optima quickly enough to approximate the global optima. This idea is somewhat like hill climbing. Starting from an arbitrary point, we try to go down or climb up a little step and compare the objective value at the new point to that at the old point. We then choose the step that increase the objective value. In this manner, we finally reach...

In this report, we examine the potential use of Guided Local Search (GLS) for function optimization. In order to apply GLS, the function to be minimized is augmented with a set of penalty terms that enable local search to escape from local minima. The function F6 is used to demonstrate the proposed technique.