研究对角占优矩阵原位替换解算方法，包括矩阵行列式、矩阵方程未知数和矩阵逆阵的解算。
The calculation methods of diagonally dominant matrix in-situ replacement are researched, including the matrix determinant, the matrix equation unknown and the matrix inversion computation.
研究具时滞的三阶非线性微分方程，利用变量替换和不动点方法，得到了此方程有界解和概周期解的存在性及唯一性结果。
This paper deals with the problems on the existence and uniqueness of bounded solutions and almost periodic solution for third order nonlinear differential equations with time lag.
然后采用变量替换，可获得物理平面上的近似解析解。
Then with the use of the substitution of variables. the approximately analytical solution in physical plane can be obtained.
这厨房自己做的替换，倒不如说我们解集的酒馆儿。
The Is Kitchens Diy Replace, Or Rather Our Solution Set a Tavern.
这厨房自己做的替换，倒不如说我们解集的酒馆儿。
The Is Kitchens Diy Replace, Or Rather Our Solution Set a Tavern.
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