partial differential coefficient meaning in English

偏导数
偏微分系数

The jacobin matrix and its elements for differential - algebraic equation simultaneous solution with newton method are formed . the network injection current and its partial differential coefficient are also derived . so , the basic calculation formulas for the full dynandc simulation are established
导出了牛顿法联立求解微分方程组和代数方程组的雅可比矩阵，以及雅可比矩阵各元素的计算公式；导出了网络方程中电流注入量及偏导数的计算公式。