子群体 meaning in English
sub - stocks
Examples
- Within every large group, such as the united states, there are many subgroups .
在每个巨大的群体内，例如美国，还存在着许多子群体。 - Ga poses implicit parallelism and is suitable for implementation on large scale parallel computers . dividing the whole population into sub - populations and coarse - grained island model of exchanging information among sub - populations are the most direct parallel method
Gas具有天然的并行性，非常适合于在大规模并行计算机上实现，把串行gas中的单一群体分成多个子群体，各子群体之间相互交换信息的粗粒度并行是将gas并行化的最直接方式。 - Pspmea is a parallel computing model designed for solving pareto - based multi - objective optimization problems by using an evolutionary procedure . in this procedure , both global parallelization and island parallel evolutionary algorithm models are used . each sub - population evolves separately with different crossover and mutation probability , but they exchange individuals in the elitist archive
在岛模型中，首先将整个群体划分成若干个子群体，在每个子群体中执行遗传算法的各步骤，并每隔一定的代数交换各子群中的精英个体；在每个子群体中，个体的评价和遗传操作使用多线程程序设计，各操作是并发进行的，这是全局并行模型。 - In this paper , an improved genetic algorithm ( ga ) was applied to the design of high performance e - plane waveguide filters at the first time . for dealing with the shortcoming of ga as low efficiency in local optimum searching , the idea based on parallel genetic algorithm ( pga ) known as separate local optimization was presented . by separating the whole population into sub - populations , and adding a new operator known as crossover between two sub - population , the new method can provide as 2 3 times quickly as traditional ga . all numerical examinations illustrated the high convergence speed and good global searching of the new algorithm , and proved the validity of it
由于遗传算法表现出良好的全局搜索性能，因此本文将其应用于高性能e面波导滤波器的设计中.针对传统遗传算法所存在的局部搜索能力差的缺点，本文在并行遗传算法的基础上，通过将原有群体划分为多个子群体，利用多个子群进行局部极值点的搜索，并利用群间迁徙，使改进后的算法收敛速度平均提高了2 3倍.数值实验表明算法具有较快的收敛速度和较好的全局搜索性能，证明了算法的有效性