The Nelder-Mead Simplex Method is direct search algorithm that's useful for non-linear optimization problems. I was researching optimization of antenna arrarys at one point and implemented several versions of the Nelder-Mead algorithm.
Research into the application of non-linear search methods - both direct-search and gradient based methods - as applied to the optimization of antenna arrays has been investigated. A novel algorithm termed Empirical Optimization was eventually developed to optimize an array in a specific environment.
My favorite hobby.