【正文】
算法計算精度低,對于標準遺傳算法以目標函數(shù)小于 800為搜索成功,標準遺傳算法運行 100次。對應(yīng)的浮點編碼遺傳算法,取 m=30,pc=、 pm=, T=100,運行 100 次, 82 次(以概率 )搜索到全局最優(yōu)(如表 1 中PPowell =0 所示),計算時間約為標準遺傳算法取 T=500 時計算時間的 1/8,但是搜索到全局 最優(yōu)的概率卻 =、 pm=, T=100,進行 Powell搜索的概率 pPowell取不同值,混合法運行100 次,計算結(jié)果見如表 1。計算結(jié)果表明混合法優(yōu)于遺傳算法和 Powell法,可以可靠地搜索到具有多個局部極值的函數(shù)優(yōu)化問題的全局解。 [3] 戴曉暉,李敏強,寇紀松.遺傳算法理論研究綜述 [J].控制與決策 。 Hybrid approach for global optima of indifferentiable nonlinear function Abstract A hybrid putational intellective algorithm for locating the global optima of indifferentiable nonlinear function was put forward by setting the Powell algorithm in realcode geic algorithm. The hybrid approach improved the local searching ability of the geic algorithm and promoted the probability for the global optima greatly. Because only the objective values are used, the hybrid approach is a generalized geic algorithm for global optima of differentiable and indifferentiable nonlinear functions. Key words global optima; hybrid approach; geic algorithms; Powell algorithm