closed number plane

Promoted an area question by using of the oriented area concept of plane closed folding and the determinant nature.

利用平面闭折线有向面积的概念和行列式的性质推广了一个面积问题。

In this paper,one theorem of directed areas for plane closed folding is given,some known results of Napoleon triangles are promote

本文给出平面闭折线有向面积的一个定理及其若干推论。

This paper studies the area of plane closed folding by complex number method and proves several propositions about area of plane closed folding.

运用复数方法,推导、证明了关于平面闭折线面积的几个定理。

The completely equal curvature of ellipse torus on closed curve in plane;

平面闭曲线上扁形椭圆环面的全平均曲率——Willmore猜想的一个例证

On one Theorem of Directed Areas for Plane Closed Folding;

关于平面闭折线有向面积的一个定理及其推论

The Closed-traverse Method in the Plane Alignment Design of Interchange;

立交匝道平面线形设计的闭合导线法

Criterion of the Planar One-bend Routing Problem with Algorithm;

平面单折布线的判别准则与算法实现

Refraction and Reflection of Nonlinear Plane Waves in Oscillatory Medium

振荡介质中非线性平面波的折射与反射

Research and Development of Foldable Row Feed of Planar Array Antenna (Low Sidelobe)

可折叠式平面阵低副瓣天线行馈的研制

Realization of design on parabolic shaping for planar multi-linkages pucker mechanism

平面多连杆折叠机构抛物线赋形的设计实现

A surface generated by a closed curve rotating about, but not intersecting or containing, an axis in its own plane.

超环面由封闭曲线绕其所在平面某一轴旋转而生成的平面，这些旋转线都互不交叉或包含

A closed plane figure bounded by three or more line segments.

多边形；多角形由三条或更多的线段围成的一个封闭的平面图形

an open curve formed by a plane that cuts the base of a right circular cone.

一个平面与正圆锥体的底部相交而形成的不闭合的曲线。

a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it.

由完全相交的一个圆锥体和一个平面的交集所形成的闭合的平面曲线。

vertical body break

辊身沿轴线垂直面折断

That is, a plane refracting surface does not image all rays from a point object at the same image point.

就是说，平面折射面并不能将来自点物的所有光线都成象于同一家点。

The end coil of the spring must be closed and flat.

弹簧两端的线圈/簧的端线圈应是闭合且平整的.

A closed curve bounding a plane area.

周界围绕一平面域的封闭性边界

Of or relating to a surface having no boundary curves.

闭合曲面的无边界曲线的面的，或与之相关的

a mansard roof with sides that are nearly perpendicular.

屋面接近垂直的一种折线形屋顶。

parabolically graded optical fiber

抛物线折射率剖面光纤维

Studies on Planar Waveguides Refractive Index Sensor for Liquid

平面光波导型液体折射率传感的研究