Applying the principal component analysis method (PCA) to these variables, we compile a single composite index (G-Index) to rank Chinese listed firms' corporate governance levels.

基于这个变量体系，我们运用主元因素分析法编制了一个可反映上市公司治理水平的综合指标——G指标。

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Method: the host molecule was selected and a single chemical component isolated from volatile oil by the host guest recognition.

方法：应用主客体识别原理，选择主体分子，经重结晶从挥发油中选择分离单一化学成分。

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This paper introduces how to seek the equilibrium constant of consecutive reaction by using the method of limiting value and by the determination of single component concentration.

介绍了利用求极值的方法，通过对反应体系中单组分平衡浓度的测定，求连串反应的平衡常数。

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