本文讨论了商函数在其极点处的残数计算，得到几个用行列式表示的计算公式，并介绍了它们的应用。
This paper discusses the calculus of residues of quotient function at ist pole, then obtains some computational formulas by the use of determinant. and gives their application.
我们试对矩阵的广义初等变换作简要阐述并举例说明其在行列式求值、矩阵求逆及矩阵秩的有关证明等方面的应用。
We've studied that the wide-sense elementary transformation of a matrix, and illustrated its application in determinant calculation, matrix inversion and the rank of a matrix.
本文所建立的数学模型可以进行行列式注气井网开发指标的预测，也可以推广应用于五点法和其它面积井网注气开发指标计算。
The new maths model can be apply to forecasting of line drive gas injection, and can be popularized to five-spot and other areal well pattern.
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