3 results about "Harmony search" patented technology

In computer science and operations research, harmony search is a phenomenon-mimicking algorithm inspired by the improvisation process of musicians proposed by Zong Woo Geem in 2001. In the HS algorithm, each musician plays a note for finding a best harmony all together. Proponents claim the following merits: HS does not require differential gradients, thus it can consider discontinuous functions as well as continuous functions. HS can handle discrete variables as well as continuous variables. HS does not require initial value setting for the variables. HS is free from divergence. HS may escape local optima. HS may overcome the drawback of GA's building block theory which works well only if the relationship among variables in a chromosome is carefully considered. If neighbor variables in a chromosome have weaker relationship than remote variables, building block theory may not work well because of crossover operation. However, HS explicitly considers the relationship using ensemble operation. HS has a novel stochastic derivative applied to discrete variables, which uses musician's experiences as a searching direction.