第二类问题是求曲线的切线的问题。
跑切线的路线。
一个凹函数的图象总在它的切线的下方。
The graph of a concave function is always below its tangent.
这一点和圆心的连线平分这两条切线的夹角。
The line connecting the point and the center bisects the included Angle of the two tangent lines.
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.
给出了求解公切线的算法和网络搜索球机制的算法。
Given the algorithm for solving common tangent ball mechanism and network search algorithms.
接触角是角之间的切线的联络点和水平线的固体表面。
The contact Angle is the Angle between the tangent line at the contact point and the horizontal line of the solid surface.
讨论了圆的切线及两圆内外公切线的一般求法及步骤。
The general ways and procedures of working out internal and external co-tangents of circles are discussed.
一个给定点的导数不过就是一条切线的斜率轻吻了那个点。
A derivative at a given point is just the slope of the tangent line that kisses that point.
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.
方法在切口部位，沿扩张区域局部轮廓切线的垂直方向切开，植入扩张器。
Methods in the area of incision, made a incision vertical to the tangent of local curve of expanding area, implanted the expander through this incision.
在射影几何的范畴内，全面地论述了两二次曲线的公有点和公切线的图解问题。
This paper deals with the graphics of the intersections and common tangents of two conics according to projective geometry .
服装结构制图应遵循切线原则：结构图中的线与线相连接处应符合切线的原理。
The tangent line principle should be followed in the structure charting of garments, i. e. the places where lines link up in the structure charting should accord with the tangent principle.
利用《高等几何》的观点、方法解决《解析几何》中的二次曲线的切线的存在性与求法问题。
To solve the problem about determinant and solution to tangent line of curve of second order in Analytic Geometry with viewpoint and methods of Higher Geometry.
连接线是将外切线的端部与位于该外切线的端部的最近处的部分圆弧或部分线的端部连接的线。
The connecting line is a line joining the end portion of the circumscribing line and the end portion of the partial arc or partial line positioned at the most proximity.
平面解析几何对“求过二次曲线外的点所引曲线切线的方程”的问题，未给出一般的方法和公式。
The problem of attaining the tangent equation of a certain point on a quadratic curve is basically solved in plane analytical geometry.
本文叙述了某电机厂自动剪切线的工作原理，分析了原生产线上存在的问题，提出了解决问题的方案。
The paper tells us the working theory of the automatic-cutting line in an electric machinery factory, analyzes the problems on the line and puts forward the solution.
此外，考虑到DDA可以准确解决的切线的滑动力，合理的安全系数可以通过以下方式获得结合强度降低的方法。
In addition, considering that DDA could accurately solve the tangential sliding force, the reasonable factor of safety could be obtained by combining strength reduction method.
根据零件的孔、槽等剖切特征，提出基于优先度和基于图遍历的两种自动搜索关键特征产生剖切线的算法，并分别结合实例进行了比较。
This paper proposes two algorithms based on priority analysis and graph traversal respectively to automatically choose the section cut of key features such as holes and slots.
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.
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.
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.
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!
有多少设计是限于创造工具而被迫选择了正切的造型形式(比如有切线限制的实体建模软件)？
How many are tangentially sculpted because of the tools of creation (tangent-restricted solid modeling software)?
方向就是轨道的切线方向。
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.
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.
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.
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.
应用推荐