With the model, the cross sectional shape of a pressing is analyzed, and the public feasible zone of sectional angle is determined, and a group of target functions are created as optimization objects.
利用该模型对冲压件截面形状进行了分析，确定了截面转角的公共可行域，并建立了一组目标函数作为优化对象。
METHODS In a cross-sectional survey, we studied purified protein derivative(PPD) test in exposure group and control group.
方法采用分组对照研究的方法，检查组与对照组对结核菌素纯蛋白衍化物（PPD）试验的反应情况。
MethodThe study was a cross sectional survey, sampling the whole group aged 80 years and above, who live in Jiajian country, Bama County.
方法截断面调查，整群抽取巴马县甲篆乡80岁以上老人。
MethodThe study was a cross sectional survey, sampling the whole group aged 80 years and above, who live in Jiajian country, Bama County.
方法截断面调查，整群抽取巴马县甲篆乡80岁以上老人。
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