介绍了笔者在流量计量实践中所用过的逼近法和待定系数法。
The author describes the approximation and method of undetermined coefficients used in the practice of flowrate measurement.
将有理函数分解为部分分式的难点就是确定部分分式中的待定系数。
The difficulty in decomposing rational function into partial fraction is to fix the undetermined coefficient in partial fraction.
然后，进行数学模型计算结果与岩样实验数据拟合，确定了数学模型中的待定系数。
Then undetermined parameters in mathematic model are confirmed by fitting mathematic model results to rock experiment data.
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