我的意思是，上一次我们讨论过了，这个梯度是垂直于等高线，并且是指向方程增长的方向的。
I mean we'd seen in last time, but the gradient is perpendicular to the level and points towards higher values of a function.
梯度向量的垂直方向，为什么是这样而不是另外一个方向？
Does the gradient vector, why is the gradient vector perpendicular in one direction rather than the other?
垂直于梯度的方向上,方向导数为零。
The directional derivative in a direction that's perpendicular to the gradient is basically zero.
当激光入射到非均匀的各向同性等离子体时，垂直于主密度梯度方向的密度分布会发生变化，使临界面呈现波纹。
When laser beam is incident on an inhomogeneous isotropic plasma, the variations in density profile perpendicular to main density gradient may develop, producing a rippling of critical surface.
结果表明：由浮力项、平流项和拖曳力项触发引起的扰动气压垂直梯度力与各对应源项具有同等量级，但与其源项的作用力方向相反。
The results show that the perturbation pressure forces induced by buoyancy, velocity advection and dray are of the same order of magnitude as the corresponding resource terms and act against them.
温度垂直梯度越大，它在垂直方向上阻碍上层海水的热量往深层扩散的能力就越强。
The greater the vertical maximum gradient is, the more powerful its capability to block vertical heat diffusion from upper water layer to deep water layer.
在窑车垂直方向上，靠近车台面处的温度梯度最大，车台面衬料的物性对窑车蓄热量的大小起着重要的作用。
In the vertical direction the temperature gradient of surface layer is the greatest. The thermophysical properties of the facial material play an important part in the heat storage of the kiln car.
利用垂直于梯度方向的图像二阶导数设计了一种新的代价函数。
This paper proposes a texture preserving fourth order partial differential equations based image denoising model.
利用垂直于梯度方向的图像二阶导数设计了一种新的代价函数。
This paper proposes a texture preserving fourth order partial differential equations based image denoising model.
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