sigma_adaptation.py 文件源码

def initialize(self, es):
        """late initialization using attributes ``N`` and ``popsize``"""
        r = es.sp.weights.mueff / es.popsize
        self.index_to_compare = 0.5 * (r**0.5 + 2.0 * (1 - r**0.5) / np.log(es.N + 9)**2) * (es.popsize)  # TODO
        self.index_to_compare = 0.30 * es.popsize  # TODO
        self.damp = 2 - 2 / es.N  # sign-rule: 2
        self.c = 0.3  # sign-rule needs <= 0.3
        self.s = 0  # averaged statistics, usually between -1 and +1