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词汇 切线
释义 切线 Qiē Xiàn ★☆☆☆☆n.名词⁰·⁰⁰¹ᴾᵃ⁹⁸⁶⁰
基本例句
tangenttangential linetangent line繁体切線 SVG可以使图像转向,以便它总是面向它所移动方向的切线。
SVG can turn an image so it always faces the tangent of the line it is following. ibm

不过主要的运动,在原点附近的话,是向下再向上的,所以答案是第四个,有一个垂直的切线。
But, the dominant motion, near the origin is really where it goes down and back up, so answer number four, you have vertical tangent. open.163.com

从视觉上看,我们要做的是,想办法,在这个反函数,在反函数上取一个点,设法找出切线。
And visually what we're accomplishing is somehow to take the hyperbola, and take a point on the hyperbola, and figure out some tangent line. ecocn

方向就是轨道的切线方向。
The direction is tangent to the trajectory. open.163.com

换种我认为更贴近事实的说法,它们是通过赋值而得到切线的近似值的,一种占位符。
Another way to say it, and I think that is probably closer to the truth, is that these things are somehow placeholders to put values and get a tangent approximation. open.163.com

记住昨天提到过的, Fdr的线积分,或者 F•,因为这些向量都是圆的切线。
Well, remember we said yesterday that the line integral of F dr, Tds maybe I should say F dot T ds now, because the vector field is tangent to the circle. open.163.com

绿色螺旋线由内部每一个正方形和四分之一圆相切线构成,而红色的螺旋线是黄金螺旋线,它是对数螺旋线的一种特殊类型。
The green spiral is made from quarter- circles tangent to the interior of each square, while the red spiral is a Golden Spiral, a special type of logarithmic spiral. yeeyan

跑切线的路线。
Run the tangents. yeeyan

请注意细微的差别,尤其是切线标示出的倒圆角与临近面的连接处,还有在那里反射光是如何被打断的。
Please pay attention to the subtle differences, particularly the Tangential line marking the fillet's point of contact with its adjacent surface, and how the reflections break there as well. yeeyan

如果两个等高线相切,说明它们的切线相同,也就是说他们的法向量应该平行,我再在这里画个图。
If the two level curves are tangent to each other that means they have the same tangent line. That means that the normal vectors should be parallel. Let me maybe draw a picture here. open.163.com

如果你想要严格的近似等式,那就意味着我们要用切线逼近来取代原函数。
If you want strict equalities in approximations means that we replace the function by its tangent approximation. open.163.com

如果你赞同我的估计值,那么作为一个投资者的话你应该这么做,你应该只持有,符合这个切线投资组合比例的投资,即9%的石油,27%的股票,和64%的债券。
If you agree with my estimates, then you should do this as an investor, you should hold only some mixture of this tangency portfolio, which is9% oil, 27% stocks, and64% bonds. v.163.com

水是构成时间传送门的围栏,而时间传送门是不同宇宙间位于切线漩涡的通道。
Water is the barrier element for the construction of Time Portals used as gateways between Universes at the Tangent Vortex. iciba

他的样本跨度比我的要大多了,所以他得出的切线资产组合会和我的不同。
Now, he's using a much longer sample than I did, so he's not going to get this tangency portfolio that I did. v.163.com

我个人比较喜欢用这个工具,而不是将路径转换为选区的方法,因为这样我就不需要去调整控制点和切线,尽管这中方法意味着更多地敲击鼠标。
I personally prefer this tool over the paths approach to selection because I don’t have to adjust any control points and tangents, even though it means a lot more clicks. yeeyan

我选择了一个圆圈,是因为我的手绘路径使得切线不断变化方向。
I chose a circle because my hand-drawn paths made the tangent jump around. ibm

我们知道 fx和 fy是,曲面上两条切线的斜率。
We know that f sub x and f sub y are the slopes of two tangent lines to this plane, two tangent lines to the graph. open.163.com

我们的法线贴图和其他很多游戏不一样,更容易理解也更容易使用,它是存储与对象空间而不是切线空间,也许下回有机会可以介绍一下。
Our normal maps are different from those in most games, and easier to understand and work with, because they're stored in object- space instead of tangent- space. Maybe I'll write about that next time! blog.sina.com.cn

下面我们来列出这些切线的方程。
And let's write down the equations of these lines. open.163.com

现在,假设曲面上有两条相交切线,那么这两条切线可以确定一个切平面,我们来看看这个平面是怎么搞出来的。
Now, if I have two lines tangent to the surface, well, then together they determine for me the tangent plane to the surface. Let's try to see how that works. open.163.com

也就是,在单位圆上, F是曲线的切线。
So, on the unit circle, F is tangent to the curve. open.163.com

用最明显的图形来描述这个过渡的特性就是:当在两个圆之间绘制一条直线,直线与每个圆只有一个交点时,那么这条线就是两个圆的切线。
The quality of this transition is best visualized by a straight line drawn between two circles: the line's only point of contact with each circle is tangential. yeeyan

在我的曲线图里我有提到切线资产组合-,我估算出切线资产组合是9%的石油,27%的股票和64%的债券。
In my diagram, I said that the tangency portfolio-- I estimated that the tangency portfolio is9% oil, 27% stocks, and64% bonds. v.163.com

这就意味着每个人,都持有相同风险资产投资组合,每人都是一样的,他们唯一的不同在于-,他们所持有风险资产的比例-,也就是切线资产组合。
That would mean that everybody is holding that same portfolio of risky assets and nobody is different, they're only different in how-- what proportions they hold the risky-- the tangency portfolio. v.163.com

这个案例中的切线投资组合又是什么呢?
What is the tangency portfolio in this case? v.163.com

这上面有一个帽子表示它是单位矢量, T表示它是切线。
It has a hat because it's a unit vector, and T because it's tangent. open.163.com

资本资产定价模型是非常重要的模型-,假设每人是理性的,并持有切线资产组合。
The asset pricing model--and this is critical-- assumes everyone is rational and holds the tangency portfolio. v.163.com

在这种组合里,你可以以无风险利率借贷到一些资金,从而可以投入比你本金更多的资金,来购买切线投资组合。
That would be a portfolio where you borrowed at the riskless rate and you put more than 100% of your money into the tangency portfolio. v.163.com
随便看

 

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