By factor analysis, the dimensions of sub-class questionnaire are:basic acts skills, complex acts skills, action expression and fine acts skills.
经因素分析，小班问卷的维度为：基本动作技能、复杂动作技能、动作表现力和精细动作技能；
From the aspect of insurance action, expression of insurance premium is derived with interval-estimation under a certain risk level, which is based on slope reliability analysis and risk analysis.
然后从边坡工程保险实施的角度，基于边坡的可靠性分析和经济风险分析，通过一定显著性水平下的区间估计得出了保险费率的表达式。
From the aspect of insurance action, expression of insurance premium is derived with interval-estimation under a certain risk level, which is based on slope reliability analysis and risk analysis.
然后从边坡工程保险实施的角度，基于边坡的可靠性分析和经济风险分析，通过一定显著性水平下的区间估计得出了保险费率的表达式。
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