A direction derivative method for the analysis of the effects of asymmetric stores on flutter speed is presented.
提出了一种分析不对称外挂对飞机颤振影响的方向导数法。
In this paper, with the aid of idea of defining those sets and functions, the definitions of E -convex cone, pseudo-quasi- E -convex functions, E -direction derivative are discussed.
借助于这些集合和函数的定义思想，本文定义了E-凸锥、伪拟E -凸函数、E -凸函数方向导数等几种更广义的概念。
And then, what's the derivative in that direction?
那么，那个方向的导数是什么呢？
But, we can still ask, is there a derivative in every direction?
但我们仍想问，是否在每个方向上都有一个导数呢？
Well, it's actually the directional derivative in that direction.
它其实是那个方向的方向导数。
The directional derivative in a direction that's perpendicular to the gradient is basically zero.
垂直于梯度的方向上,方向导数为零。
And,the slope is going to be the directional derivative in that direction OK, I think that's as graphicas I can get.
这个斜率就是此方向的方向导数,好了，我想我说的已经尽量图形化了。
So-called gravity anomaly linear structure signal is derivative of gravity anomaly level total gradient on gravity direction, and the derivatives must be greater than zero.
所谓重力异常线性构造信号就是重力异常水平总梯度沿重力方向的一阶导数且是大于零值的那一部分。
Since the numerical derivative represents the search direction of optimization process, it's the key information for optimization.
而在优化计算过程中，导数是至关重要的信息，因为它代表了寻优过程的搜索方向。
Firstly, using the first order derivative of Gaussian function as the base wavelet, the direction Angle function of a planar curve was analyzed on multiple scales to obtain the candidates of corners.
使用高斯函数的一阶导数作为基本小波，对曲线的方向角函数进行多尺度小波分析得到候选点集，提出了四个筛选规则对候选点集进行逐步筛选得到正确角点集。
Its partial derivative equation is solved by alternating direction implicit algorithm.
采用交替方向隐式算法求解偏微分方程。
Its partial derivative equation is solved by alternating direction implicit algorithm.
采用交替方向隐式算法求解偏微分方程。
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