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交叉量
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     On Quantity
     论
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     cross-lineage expression and "null cell" type.
     交叉表达 ;
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     water resources quantity;
     水资源;
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     (2) cross lineage expression;
     交叉表达 ;
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     However,larger amount deformation could only be obtained by cross-rolling foras-cast composite.
     而铸态的复合材料要获得较大的变形必须交叉轧制。
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  crossover value
Sp3 is linked with the fruit colour gene T with a crossover value of ca.
      
A deficit of apricot-fruited seedlings in progenies segregating for i could be explained by linkage between i and the self-incompatibility S locus with a crossover value of approximately 26.7%.
      
Further, the gene Pc for purple coleoptile shows linkage with one of the complementary genes with a crossover value of 15.26%, while the gene(s) for seedling height Ts with Ic1 with a crossover value of 1.7%.
      
(a) When Δ is below a certain crossover value Δ*, we expect an unperturbed (Langevin) Brownian motion.
      
For L much smaller than this crossover value, the diffusion constant Dxx is again dominated by the steps and the barriers at the step edges.
      
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To solve the problems of premature convergence and local minima in simple genetic algorithm (SGA), an evolutionary grad-included niche genetic algorithm (GNGA) was proposed. In the GNGA, evolutionary grad was used to improve the ability of finding the local best; the crossover value and mutation value were adapted dynamically with the generation so that the precision was improved; the population diversity was guaranteed by the use of the niche algorithm based on crowding mechanism. Simulation results show that...

To solve the problems of premature convergence and local minima in simple genetic algorithm (SGA), an evolutionary grad-included niche genetic algorithm (GNGA) was proposed. In the GNGA, evolutionary grad was used to improve the ability of finding the local best; the crossover value and mutation value were adapted dynamically with the generation so that the precision was improved; the population diversity was guaranteed by the use of the niche algorithm based on crowding mechanism. Simulation results show that this method has its superiority in precision and convergence rate compared with SGA.

针对基本遗传算法易于早熟及局部寻优能力较差等不足,提出了一种引入进化梯度的改进小生境混合遗传算法(GNGA)。利用进化梯度信息调整个体向更优解进化,并根据进化代数自适应调整实数编码个体的交叉量和变异量,增强了局部寻优能力和解的精度。基于排挤的小生境算法的引入,保持了种群的个体多样性以克服早熟。在Shubert函数上的仿真结果表明,与小生境遗传算法相比该算法能有效提高解的精度及收敛速度,找到更多最优解。

 
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