I am really impressed with dy Jironal and the true tension he brings to the story.
我真的很慨叹于迪·吉罗纳以及他给故事带来的真正张力。
And, once you have a formula for ndS, that will relate ndS to maybe dx dy, or something else.
一旦有一个ndS的公式，那将会把ndS和dx,dy联系起来，或者其他的一些东西。
If you end up with a dx, dy, dz in the surface integral, something is seriously wrong.
如果在这个曲面积分中是以dx,dy,dz结尾的，则表明出现了很大的问题。
And, for that, we'll have to figure out a way to slice this region nicely. We could do it dx dy.
为了计算二重积分，我们必须想出一个办法，来适当地划分这个区域，我们可以按dx,dy来划分。
On the math it is a line integral of something dx plus something dy.
从数学意义上来说，这是dx部分加上dy部分的线积分。
So, instead of setting up the integral with bounds and integrating dx dy or dy dx or in polar coordinates, I'm just going to say, well, let's remember the definition of a center of mass.
那么我们将不会建立带上下限的积分，和积分dx,dy, dy, dx或者在极坐标做线积分，需要说，让我们回忆一下质心的定义。
Or, it tells you actually anything you might want to know about the relations between these variables so, for example, you can move dz to that side, and then express dz in terms of dx and dy.
事实上它告诉了我们，任何的关于这些变量之间的关系，例如，可以把dz移到另一边，用dx和dy来表示。
Once you have found the ratio between du dv and dx dy, then it works one way or it works the other way.
你一旦找到了dudv和dxdy之间的比率，它在这个情况下行得通，在相反的情况下行得通。
OK, and so the coefficients of dx and dy are the partials.
那么dx和dy前面的系数就是偏导数。
So we found an expression for dz in terms of dx and dy.
我们得到了dz关于dx和dy的表达式。
Or, you can move dy to that side and express dy in terms of dx and dz, and so on.
或者把dy移到另一边，用dx和dz来表示dy，诸如此类。
Remember the general method is that we first look at the inner integral, here integral of f dy.
一般是,先考虑内积分，这里即f对dy的积分。
While the function that you are integrating goes before the dx dy and not into the bounds or anything like that.
而积分函数就是dxdy前的这个函数，它与积分边界无关。
Well, we can do that in rectangular coordinates dz dx dy where dV becomes something like, maybe, dz dx dy, or any permutation of these.
我们在直角坐标系中处理，在这里dV有可能变成，或者它们的其他排列。
Dysprosium (Dy) was discovered in 1886 but it wasn't until 1950 that scientists were able to isolate it.
镝（Dy）发现于1886年可是直到1950年科学家才将它分离出来。
dxdy Last time I told you if we have dx dy we could switch it to r dr d theta.
上一次课提到，如果给出,我们可以把它转换为rdrdθ
So, that means du dv is worth five times dx dy.
所以，这也意味着dudv比dxdy大五倍。
So, if we want to set it up instead dx dy, then it means we are going to actually look at the converse question which is, for a given value of y, what is the range of values of x?
如果要用dxdy来替换，就是说,转化为与之相反的问题来看，给定y的一个值，那么x的取值范围是什么呢？
So, we should get to something that will be the same integral dx dy.
也就是在某个边界里算dxdy的积分。
So, we know that we want to integrate just the area element, let's say, dx dy over the origin inside the ellipse.
我们知道现在要积分面积元素，那就对dxdy积分。
OK, so I'm computing the integral of y dx x dy.
我来计算ydx+xdy的积分。
People flocked to see for themselves the marvel of green pad dy flourishing on the once barren desert land.
在从前贫瘠荒芜的土地上，翠绿的稻秧茁壮成长。人们成群结队前来亲眼观看这个奇迹。
As the earliest systematic Chinese characters, oracle bone inscriptions, to some extent, reflect the social phenomenon in Shang Dy-nasty.
甲骨文作为最早的成系统的汉字，在一定程度上可以反映出商朝的社会面貌。
Let the winds and waters be mingled with our melo - dy.
让风和水与我们的快乐混合在一起。
With mixed feelings he said good - bye to Dy . Archibald.
他怀着矛盾的心情告别了阿奇博尔德大夫。
Two simple and efficient algorithms of sub-pixel corner detection for camera calibration dy using plane pattern were presented.
针对摄像机标定模板图像的角点检测问题，提出了两种简便而有效的亚像素级精度的提取算法。
The sportswear brand is also believed to have consolidated its media account with Hakuhodo from Daiko Advertising, which is part of Hakuhodo DY Holdings.
这家运动品牌从大广广告株式会社那里巩固了与博报堂的媒体和约。大广广告株式会社是博报堂DY控股公司的成员之一。
The sportswear brand is also believed to have consolidated its media account with Hakuhodo from Daiko Advertising, which is part of Hakuhodo DY Holdings.
这家运动品牌从大广广告株式会社那里巩固了与博报堂的媒体和约。大广广告株式会社是博报堂DY控股公司的成员之一。
应用推荐