用多元非线性相关因子对大坝观测点的水平位移量作预报的工作,对于发现大坝局部位移异常,监视大坝安全,是很有意义的。由于观测数据多,各因子与预报量间的函数关系一下子也很难搞清,搜集数据和计算工作量都是相当大的,目前,最有效最迅速的方法是逐步回归分析方法,利用电子计算机来建立预报量的最优同归方程。国内大型混凝土坝大都采用 It is significant to find out the local displacement anomaly of the dam and monitor the dam safety by using the multiple non-linear correlation factors to forecast the horizontal displacement of the dam observation point. Due to the large number of observations, the functional relationship between each factor and the forecasting volume is hard to find at a glance. The data collected and the workload are quite large. At present, the most effective and rapid method is a stepwise regression analysis method that uses electron Computer to establish the forecasting amount of the best regression equations. Most domestic large-scale concrete dams are used