Its methods include weight loss hanging slice method, resistance method, hydrogen monitoring method, linear polarization resistance method and chemical analysis, etc.

其方法包括失重挂片法、电阻法、氢监测、线性极化电阻法、化学分析等。

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Results:Mixed linear models statistical method revealed that the main factors of child growth were age, SGA or not, gender and birth weight.

结果：采用混合线性模型协方差分析发现，与婴幼儿生长密切相关的主要因素为月龄、是否SGA、性别和出生体重；

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Starting from the Operations Research, this paper proposes method of linear programming approach with weight to fitting variogram, effectively guarantee the non-negative of the results of solving.

从运畴学的角度出发，提出了基于带权线性规划的方法拟合变差函数，有效地保证了求解结果的非负性。

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