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人教新課標(biāo)音樂(lè)四年級(jí)下冊(cè)《紅蜻蜓2》-預(yù)覽頁(yè)

 

【正文】 算法計(jì)算精度低,對(duì)于標(biāo)準(zhǔn)遺傳算法以目標(biāo)函數(shù)小于 800為搜索成功,標(biāo)準(zhǔn)遺傳算法運(yùn)行 100次。對(duì)應(yīng)的浮點(diǎn)編碼遺傳算法,取 m=30,pc=、 pm=, T=100,運(yùn)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(jì)算時(shí)間約為標(biāo)準(zhǔn)遺傳算法取 T=500 時(shí)計(jì)算時(shí)間的 1/8,但是搜索到全局 最優(yōu)的概率卻 =、 pm=, T=100,進(jìn)行 Powell搜索的概率 pPowell取不同值,混合法運(yùn)行100 次,計(jì)算結(jié)果見(jiàn)如表 1。計(jì)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(gè)局部極值的函數(shù)優(yōu)化問(wèn)題的全局解。 [3] 戴曉暉,李敏強(qiáng),寇紀(jì)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
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