用逐步回归法对影响井壁稳定性的因素进行了分析，通过逐步筛选因子从诸多因素中找出了对井壁坍塌有重要影响的因素。
Influence factors of hole stability are analysed by means of step regression analysis method, and they can be sorted by step sizing factor.
通过对调查结果进行离散趋势分析、因子分析、逐步回归分析、判别分析法和克朗巴赫系数法等分析方法筛选条目。
Select the items through the discrete trend analysis, factor analysis, stepwise regression analysis, discriminant analysis and Crowns Bach coefficient method to the survey result.
并用双重筛选逐步回归的方法分析了环境(气候和土壤)因子与植物群落生活型谱梯度的关系，建立了相应的数学模型。
The relationship between environmental factors (climate and soil) and plant life form gradient was analysed by doub sieving progressive regression method, and mathematical models were set up.
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