在水泵的选型或运行中，通常采用多项式的最小二乘法或根据假设的函数关系来拟合水泵性能曲线。
Least square method of polynomial or the method based on the given function are used to fit pump characteristic curve in pump selection or operation.
本文采用线性边际成本函数假设，研究了成本曲线拟合问题。
Curve fitting problems are also discussed assumed linear marginal cost function.
复相关系数、F检验、t检验结果表明，该模型满足线性与方差齐性的假设，拟合效果较好。
The result of multiple correlation coefficient testing, F-testing and t-testing indicates that the model meets the hypothesis testing of linearity and its matching effect is preferable.
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