The 5 body measurements and weight of 815 Qinchuan cows at five different age phases are studied by principal component analysis.
对陕西蒲城县和渭南市临渭区5个不同年龄阶段815头秦川母牛的5项体尺和体重性状进行了主成分分析。
The entrepreneur human capital contributive income models are formed according to different features of the five phases and they are based on the EVA.
针对各个阶段的不同特点分别构建了基于经济增加值（EVA）的企业家人力资本贡献性收益的确定模型；
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