In this papery we discussed the the extremum of function of several variables , and generalized the result of paper [ 2 ] , then we give the method of solving the extrme value of n - component function using first class partial derivative 摘要讨论了多元函数极值的问题,推广了文献[ 2 ]的结果,并给出了利用一阶偏导数求多元函数极值的方法。
The partial derivatives of the learning error to the outputs of the hidden neurons are defined as the sensitivities of drnn . those redundant neurons are discarded progressively and the generalization capability of drnn is improved finally 3 .本文采用修剪法确定神经网络的最佳拓扑结构,以学习误差对隐层神经元输出的偏导数作为神经网络的灵敏度,逐步去除网络中的冗余神经元,以提高动态递归神经网络的泛化能力。
We deduce the 3 - d interface partial derivative of the travel time according to the theory of wave inverse propagation , simplify the full formula of 3 - d interface partial derivative and gain the interface partial derivative of the reflection travel time in 2 - d media and 1 - d media 摘要根据波逆行原理推导了三维介质中地震波射线走时对界面偏导数的完整基本关系式,并对基本关系式进行简化,得到其在二维和一维介质中的关系式。
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。
The integral calculus formula is deduced , in which the first derivative of physical measures of system with respect to time equals the partial derivative of physical measures of control field to time plus clear flux of physical measures passing the control line within unit time 推导出交通流系统所具有的物理量对时间的全导数的积分公式,即系统内物理量对时间的全导数等于控制域内该物理量对时间的偏导数与单位时间经过控制线的该物理量的通量之和。