Jakobin matrix的用法和样例：
例句
- The Jacobian matrix of the parallel manipulator had been derived by taking the derivative of the constraint equations.
利用对机构约束方程求导数法得到机构的雅可比矩阵。 - Some improvements are made on the Jacobian matrix direct-conversion method and its application is expanded from the reactive power optimization to the general OPF.
其中，在现有的潮流雅可比矩阵直接变换法的基础上做了一定的改进，并将在无功优化模型上所做的研究扩充到通用的最优潮流模型上。
