17．回归直线法 回归直线法（Regression Line Method）是根据过去若干期全部业务量与成本的历史资料，应用最小平方法原理，借以推算混合成本中的固定成本和单位变动成本的方法。
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If there appears to be a linear relationship test results should be established by appropriate statistical methods (e. g. by calculation of a regression line by the method of least squares).
如果其呈现线性关系，测试结果应该通过适当的统计学方法(例如，以最小二乘方来计算回归线)来确立。
And the usefulness of the regression method in the application of line heat forming is emphasized.
指出对于水火弯板应用回归分祈方法的实用性。
According to the monitor data analysis which has been carried on the regression method, we can forecast the finally displacement value and the line security condition.
通过对监测数据回归分析，可以预测测点可能的最终位移值和既有线路的安全状况。
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