PLS partitions the population into a group of disjoint subpopulations by cluster analysis, then USES simplex method to search local optima in each subpopulation in parallel.
PLS算子通过聚类分析将种群分割为互不相交的邻域子种群，对每一个子种群应用单纯形法进行并行局部搜索。
The changes of T lymphocyte subpopulation of peripheral blood were observed in 30 cases of chronic gastropathy with spleen deficiency(Experimental Group, G 1), and in 60 normal cases as control(G2).
以30例慢性胃病脾气虚患者为实验组，观察其外周血T淋巴细胞亚群的改变，并以60例健康人为对照。
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