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We select 94 companies and divide them into two groups, one training samples (composed of 25 ST companies and 25 non-ST companies) and one examining samples compos

本文共选取了94家公司并将其分为两组，其中50家(25家ST公司和25家非ST公司)作为训练样本，剩余的44家(22家ST公司和22家非ST公司)作为检验样本。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。