We have seen that the gradient is perpendicular to the level surface.
我们已经知道，梯度是垂直于等值面的。
We know that the gradient is perpendicular to this vector that's tangent to the level surface What about other vectors tangent to the level surface?
我们知道梯度向量垂直于这个向量，而速度向量是相切于等值面的，其他相切于等值面的向量，又如何呢？
Well, that means the gradient is actually perpendicular to the tangent plane or to the surface at this point.
那意味着，梯度向量在这点上，垂直于切平面或者是等值面。
Then you know that the gradient of g is perpendicular to the level surface.
那么就知道了g的梯度,是垂直等值面的。
Create a gradient fill across your selection as shown in the screenshot below to complete creating the logo's surface.
如下面的截图，横穿你的选区，创建一个渐变填充，来完成Logo外观的创建。
With increasing reaction time, the cross linking reaction proceeded from the surface to core gradually to give a gelatin material with cross-linking degree gradient across the section.
研究发现，随着交联时间的延长，交联反应从明胶材料的表面至内部逐步进行，由此可获得交联度呈梯度变化的明胶材料。
Finally the effect of refractive index gradient on the wave surface quality of laser beam is discussed.
讨论了折射率梯度对传输激光波面质量的影响和波面补偿的可能性。
Two kinds of size effects on micro deep drawing are investigated, which can be explained by surface layer model and strain gradient model.
另一个为考虑应变梯度效应的模型，该模型在已有的材料特征基础上引入了尺度效应。
A general method for designing magnetic field gradient coils on a cylindrical surface with an axial magnetic field to be used in NMR imaging is suggested and developed.
系统地介绍了用于磁共振成像系统中具有轴向磁场的圆柱型表面梯度线圈的设计与优化。
Using the strong background magnetic field produced by effective electromagnet and the catching surface to produce high magnetic field gradient makes the separation of micro-grade material possible.
利用有效电磁体产生的强背景磁场和能产生高磁场梯度的捕集表面，使得分选微米级的物料成为可能。
The measurement principle for specular and mirror-like surface was discussed and the main algorithms and key points for shape reconstruction via gradient data were analyzed in general.
本文详细介绍了依据条纹反射术测量镜面、类镜面的原理和方法，分析了经由梯度数据重建三维面形的主要算法和关键问题。
The sliding contacts of gradient layers, sandwich layers and ordinary multi-layers coatings subjected to the same surface load have been investigated under elastic-plastic deformation in this paper.
本文研究梯度层、三明治层及普通多层膜覆层体受相同表面载荷滑动接触作用下的弹塑性变形情况。
Researching on the coalescence of droplets on the gradient surface energy by visualizing experiment, and the effect of droplets movement by the coalescence process would be analyzed.
对梯度表面能材料上的液滴聚合进行了可视化实验，分析了聚合过程对液滴运动的影响。
The more the bubble close to the free surface, the narrower the bottom jet develops crosswise, and the larger the pressure gradient, the rising velocity and the height of the bottom jet is upwards.
越靠近自由表面，底部射流横向发展越窄，而向上的压力梯度，气泡上升速度，底部射流上升高度越大，反之则反；
Through the numerical analysis, it is posed that the structure surface stress gradient and the coating thickness are the principal factor that influence thickness effect.
通过数值分析提出，构件表面应力梯度和贴片厚度是影响厚度效应的主要因素。
Many researches showed that, the coalescence is the main reason to speed up the movement of drops on the surface with gradient surface energy and separate from the surface in dropwise condensation.
已有的研究工作表明：液滴的聚合是加快梯度能表面材料表面上液滴运动和滴状凝结中液滴快速运动的主要原因。
The results indicate that passive control technique can reduce peak Mach number on the surface of the airfoil and reduce the adverse pressure gradient, shock is also weakened.
结果表明，被动控制使得沿模型表面的马赫数峰值及过压力梯度明显减小，激波减弱。
Through quantitative and SEM analysis, the minim zinc was found remaining on the surface of weld and the zinc thickness on the heat-affected zones appeared gradient.
定量及SEM分析表明，焊缝中表面只残留少量锌，在焊缝两侧的热影响区，锌层厚度呈梯度分布。
Hydraulic gradient in sand increases constantly and the maximum is occurred when the bottom of bucket arrives to the sand surface.
砂中水力梯度一直增大，极大值产生在桶底接触砂面时。
This paper deals with X-ray diffraction profile analysis for the sample with a micro-strain gradient in its surface layer.
本文讨论了样品表面层有微观应变梯度时X射线衍射线形分析的方法。
A thin surface layer always exists near the surface of laser heating melt pool due to the fluid flow driven by the surface tension gradient.
在激光材料加热中，由于存在着表面张力驱动的流动，熔池表面附近熔体的速度梯度很大。
Simulation result also indicates that the rill width is affected both by slope gradient and critical detachment velocity of surface soil on the hill slope.
模拟结果表明，细沟扩宽过程对坡度和坡面表土临界起动流速的变化十分敏感。
GDS testing results indicate the carbon content of the surface reaches 29.8%, the carbon content in the alloyed layer emerges in gradient distribution too.
辉光放电光电子谱仪（GDS）渗层成分检测结果表明表面含碳量可达29.8%，合金渗层的碳含量也呈梯度分布；
In addition, numerical simulations of turbulent flow over riblet surface are carried out in 7 kinds of pressure gradients. The effect of pressure gradient is analyzed.
同时还对7种压力梯度下沟槽表面流场进行模拟，研究了压力梯度对减阻效果的影响。
Moreover we found the rule of distribution of pressure on wall surface and discussed the influence of rate of curvature and gradient of pressure on the characteristics of spill flow hydraulics.
同时给出了壁面压强分布的规律和探讨了壁面曲率和压强梯度对溢流水力特性的影响。
In combination with the gravimetric method, one can obtain the adsorption amount of water and the thickness of adsorbed water layer on solid surface under various driving gradient pressures.
结合重量分析，用离心法可得到不同驱动压力梯度下的吸附水量及吸附水层厚度。
An ideal experiment exhibits that pressure gradient force computations in the pressure terrain-following coordinate are sensitive to surface pressure.
在气压地形追随坐标中气压梯度力的计算对地表气压计算很敏感。
The floor surface temperature gradient is rational, which helps to reduce heat loss.
地板表面温度梯度合理，有利于减小热损失。
The floor surface temperature gradient is rational, which helps to reduce heat loss.
地板表面温度梯度合理，有利于减小热损失。
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