Rival evolution algorithm based on natural ecological community

A new genetic algorithm is discussed. We call it the rival evolution algorithm. It isn't similar to general GAs. In this algorithm we design a new selection method. We use a group of selection strings (or we can call it genomes) to take the place of the general selection operator. The theory of this is based on the rule of the natural ecological community. We discuss the performance of this algorithm in detail and we compare the performance of it with the other general GAs.