通过模型试验，运用数理统计的方差分析理论对切缝套管的参数进行技术优化，以指导工程实践。

By model experiment, the parameters of slit holder are optimized turning to variance analysis theory of mathematical statistics in order to guide engineering project.

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从现代数理统计的角度，对这种随机误差的影响进行较深入的分析，得出了有益的结论。

This paper makes thorough analyses for the effects of the random errors with modern statistics and achieves useful conclusions.

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本研究通过理论分析、问卷调查、数理统计等方法对造成部分贫困大学生心理不健康的原因进行了分析。

This paper deals with the reasons that cause the unhealthy psychology of the poor students by some methods such as theoretical analysis questionnaire investigation and mathematics statistics, etc.

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