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针对统计回归计算中出现的水压因子难以入选和入选以后计算结果不合理的困难，本文应用偏最小二乘回归建立坝顶水平位移的统计模型。计算结果表明，相对于逐步回归和多元回归，基于偏最小二乘法的回归模型，取得较合理的结果。
In view of the difficulty of selecting hydraulic parameters in calculation of statistical regression and the unreasonable calculation results after the selection, the statistical model of horizontal displacement of dam crest is established by partial least-squares regression. The calculation results show that, compared with the stepwise regression and multiple regression, the regression model based on partial least squares is used to obtain more reasonable results.