相交直线

每条曲线基本上可以用两条相交直线拟合。其次进行了密度正交试验，发现长径比影响最明显，锥度与直径次之。

And each curve basically can be substituted with two intersecting lines . Then , orthogonal density experiment was performed and the results showed that : the length-diameter ratio is the most important factor , taper comes next and diameter takes the third place .

利用两相交直线处理凸平面立体隐藏线

Treatment of hidden lines of raised plane object with two intersecting lines

本文探讨了旋转抛物面的反射特性，指出了抛物面上任一点P的反射光锥与焦平面相截的截口曲线分别为圆、椭圆、抛物线、双曲线和两条相交直线。

Theoretical analysis of the reflective characteristics of paraboloidal mirrors has shown that the cross ─ section intercepted by the cone of light reflected from any point of the parabola with the focal plane would be respectively a circle , ellipse parabola , hyperbola or two cross lines .

一些相交直线彼此倾斜。挡人视线的倾盆大雨

Converging lines incline toward each other blinding sheets of rain

根据边界性质，两相交直线边界内的含水层有三种类型。

According to the properties of boundary there are three types of aquifer within two intersecting rectilinear boundaries .

两相交直线边界内稳定流单井涌水量综合性公式的探讨

On synthetic formulae of hydraulic discharge of a single well with steady flow within two intersecting rectilinear boundaries

本文论述了用两相交直线处理凸平面立体隐藏线的方法。

The method of handling the hidden lines of raised plane object with two intersecting lines has been presented .

讨论了一般异面直线的相交直线存在及唯一存在的充要条件，证明了两者的等价性，并在唯一存在时给出了一般的表达式。

The full and necessary conditions that the intersection line with general straight lines in different planes existed and existed solely was discussed .

文章运用两种巧妙的分割和利用无穷递缩等比数列求和公式等初等数学知识，求出了抛物线与相交直线围成的弓形面积计算公式。

In this paper , we show a formula for the arciform area enclosed with a parabola and a straight line by means of two kinds of clever separation and the knowledges of elements mathematics such as the sum formula of infinite decreasing geometric sequence .

利用数学分析的工具推导出空间两直线最短距离的计算方法，该方法可用于异面直线，相交直线，平行直线和重合直线的判断。

Using the methods in mathematical analysis , this paper has concluded the calculation methods of the shortest distance between two lines in space , and the methods can also be used in the judgments of lines on different planes , crossing lines , parallel lines and coincidence lines ?

针对直线与平面相交，直线可见性的判断问题进行研究。

This article aims to study the intersection visibility of line and plane .

提出并论证了各种位置直线与平面相交，直线在相邻两投影面上可见性的投影规律。

The projection sequence of plane graphs apex and relationship of the sequence and plane faces were discussed in this paper .

我们用两个方程来描述一条直线，两个方程告诉我们平面相交于直线。

So , we could describe a line by two equations telling us about the two planes that intersect on the line .

此推论使得直角投影定理自身更趋于完整，同时，对垂直相交两直线的判断和作图也有一定帮助。

This supplement to the theorem perfects the rectangular protection theorem , and helps judge two lines intersecting vertically and draw graphs .

这些拐角常见的形式有：直线与直线相交，直线与圆弧相交和圆弧与圆弧相交。

There are three form of the corner : the intersection between two straight lines , the intersection between lines and circular arc and the intersection between two circular arcs .

编制一些通用的程序，如正多边形、相交两直线的倒角或倒圆、从圆柱面上铣圆弧（展开图是圆弧）、圆孔或圆凸台、有两直角边的、两圆孔的零件等；

We edit some general programs , such as polygon , chamfer or fillet on two intersecting lines , milling arc from the cylinder ( the unwrapping drawing is arc ), hole , pad , and the part of two-datum plane or two ho ; holes etc.

有关平面与二次锥面相交成实直线两个定理及其应用

Two Theorems for the Real Line from the Crossing of Plane and Quadratic Cone and Their Application

这个两平面相交得到的直线，两平面都经过同一条直线，此处，另外两平面交成直线，这一条，那一条。

So , see , the lines of intersections between two of the planes , so , here they all pass through the same line , and here , instead , they intersect in one line here , one line here , and one line there .

和曲线接触但不相交的一条直线。

A straight line that touches but does not intersect a curve .

将其中的一个平面规定为由投影中心和投影直线所确定的平面，称之为反透视投影平面，而另一个平面规定为与反透视投影平面垂直相交且通过空间直线的平面。

One of the two arbitrary planes is formed by the origin and the projected line , which is called the inverse perspective projection plane , the other is perpendicular to the inverse perspective projection plane , and go through the 3-D line .