外形平滑时而带有梯度，上下，左右面的边缘有一定弧形。
Smooth shape with a gradient from time to time, from top to bottom, left and right side edges have a certain arc.
因此，主盘在形成伊始有一个很大的丰度梯度，就像遥远的狮子座里的那个星系那样。
Thus, the disc begins its existence with a steep metallicity gradient, like the one in the distant galaxy in Leo.
这就是计算的一般方法，但求功的时候，如果向量场是某个势的梯度,是有捷径可走的。
OK, so that's the general method of calculation, but we've seen a shortcut for work when we can show that the field is the gradient of potential.
有一个力场，它是某种势的梯度，我们还是保持正号。
So, it's a force field is the gradient of a potential so, I'll still keep my plus signs.
梯度场做的功有很多漂亮的性质，它们是特殊的的向量场。
Well, there's various nice features of work done by gradient fields that are not too far off the vector fields.
如果天文学家能够观测到十亿光年外的螺旋星云的金属丰度梯度，我们就可以知道亿万年之前的梯度有多大，因此也就可以知道它是如何随时间变化的。
If astronomers could observe metallicity gradients in spiral galaxies billions of light-years away, we could see how steep the gradients were billions of years ago and thus how they change over time.
最好的方法是，既然我们已经有了梯度向量，就可以直接说,我们知道了切平面的法向量。
OK, the best way to it, now that we have the gradient vector, is actually to directly say oh, we know the normal vector to this plane.
但我们知道有另外一个向量也是和g的等值面垂直的，这个向量就是g的梯度。
But we know another vector that is also perpendicular to the level set of g. That is the gradient of g.
结果表明有效的热补偿对镜面变形峰谷值有很大的影响，在非光照区进行热补偿可以大大降低镜体的温度梯度，从而明显减小镜面变形的峰谷值。
The results show that thermal compensation in non-irradiant areas could reduce the temperature gradient of mirror for high-power laser, and then could decrease the thermal deformation significantly.
我们通过给人体提供一个有磁引力场场强梯度的环境，让人体丛中吸收足以维持生命所需的能量。
We can provide the environment that allows the body to have both gradients of gravitational and magnetical, that it can take what it needs from its environment, that it feeds and sustains life.
医学图像融合的效果评价方法有很多，如信息熵、互信息、均方值、峰值信噪比和平均梯度等。
There are many kinds of image fusion methods, such as information entropy, mutual information, mean square error, peak signal to noise ratio and mean grads.
尺寸越小的准直器特别有助于针对病灶产生有陡峭剂量梯度和适形的照射剂量。
Smaller collimators are particularly good at generating steep dose gradients and conforming dose to the target.
背景光对兰圆鲹在水平光梯度内之趋光性有影响。随着光强的提高则影响有减弱趋势。
The background light influences phototaxis of round scad on the horizontal gradient condition, the influence weakens with the increasing light intensity.
本文则用气候模式对作者提出的有地形数值模式中气压梯度力的误差扣除法进行了模拟检验。
Modelling tests are made in this paper to check the error subtraction scheme of the pressure gradient force in models with topography developed by the authors.
这些结果将对直接傅里叶成像中所用的电磁铁和梯度线圈的设计与制造有一定的意义。
The promising results presented here could strongly influence practices in the design, manufacturing and use of the main magnet and gradient coils for direct Fourier MR imaging.
现代科学技术中出现了大量复杂的非线性问题，其中大部分在局部有大梯度甚至不连续的特点。
More and more complex nonlinear problems appear in Modem Science and Technology, with large gradients or discontinues in local region.
结果表明，沥青层模量梯度对沥青路面结构表面剪应力有显著的影响。
The result indicates that there is a great influence of stiffness gradients of asphalt course on asphalt pavement structure shear stress.
双频梯度测量法有抗干扰能力强、分辨率高、仪器轻便等特点，实践证明应用效果很好。
Characterized by strong anti-interference capacity, high resolution ratio and portability of the instrument, the dual frequency gradient method has proved effective in practice.
在边界提取时选取有一定间距的像素分别计算三原色梯度，把其中绝对值最大的梯度作为边界存在的判据之一，同时根据二阶导数符号变化提取边界。
Third, the gradient between two pixels that have certain distance was calculated in three color components respectively, and then the maximum of gradients of the three was attained.
穿过地理梯度，莱文斯预料有分布区不重叠的小种或近群种。
Across geographic gradients, Levins expects allopatric RACES or coenospecies exist.
结果表明，在一定范围内，镀层成份梯度(化)钢帘线与橡胶粘结力有显著影响。
It is shown that in certain extent, the composition gradient of the brass coating has great effect on the adhesion between steel cord and rubber.
现今地壳垂直运动高梯度值带与地震带的分布有较好的吻合性。
There is a better consistence between the gradient value of the vertical crustal movement and the distribution of seismic zone on space field.
指出了其基本的问题是其中应力(应变)或者其增量是否为一有势场的梯度矢量。
The keystone is whether or not there is unique potential field in which the stresses (strains) or their increments are its gradient vectors.
对于单输出前馈神经网络的梯度算法的收敛性已经有了详细的讨论。
The convergence of the gradient algorithm for feedforward neural networks with one output unit has thoroughly studied.
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。
This paper deals with X-ray diffraction profile analysis for the sample with a micro-strain gradient in its surface layer.
另外，借助有限元软件来模拟复合材料在吸热过程中温度及热梯度场的分布情况，对实际生产有一定的参考价值。
Simulated the distributing condition of temperature and heat grads of the compound material by ansys software that is definitely a reference for practice production.
由于梯度材料在空间上渐变的特征，使得相应的力学行为与常规材料有较大的不同。
Due to the graded properties of FGM in space, its mechanical behaviors are different from that of conventional materials.
有了犯罪梯度，我们就可以将犯罪与刑罚建立对应联系，最大程度地避免量刑上的畸轻畸重。
Once we have the scale, we can set up a corresponding relationship between a crime and a punishment, and avoid sentence unbalance to the most extent.
有了犯罪梯度，我们就可以将犯罪与刑罚建立对应联系，最大程度地避免量刑上的畸轻畸重。
Once we have the scale, we can set up a corresponding relationship between a crime and a punishment, and avoid sentence unbalance to the most extent.
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