查询词典 concave angle

In 1985,Guo Dajun proved that an increasing and α concave operator is of cone contraction,however,is an increasing and α convex operator of cone expansion ?

5年 ，郭大钧证明了增的α-凹算子是锥压缩的，那么增的α-凸算子是否是锥拉伸的呢？

A mathematician would say the shift from yellow to purple was an inflection point, shifting the curve from convex to concave.

数学家会说从黄色到紫色的转变是个拐点，曲线由凸变凹。

According to the practical project "Research on the mechanical optimization of the slope configuration for the Jinduicheng open pit " which the author has engaged in, study on the oval-shaped deep-concave open pit slope with the convex curve has been presented in this thesis.

论文作者通过参与导师《金堆城凹陷露天矿边坡形状力学优化研究》项目所做的研究工作，以金堆城露天矿为研究对象，重点研究了水平面为椭圆形竖直面为凸形的深凹露天边坡。

The article describes the optimal algorithm in details. Next, it gives a strict proof from the view of vector comparison and concave or convex pieces of domain.

本文详细地描述了此最优算法，然后从矢量比较和凹凸分段区域的角度给出了严格的数学证明。

As shown, a thin convex lens with focus length 10 cm and a concave

如上图所示，一焦距为10 cm的薄凸透镜和一半径为20 cm的凹球面反射镜共轴。P点球心

Convex polygon, which means that if a portal turns out to be concave, we will generate several

味着如果Portal 是一个凹多边形，我们必须将其切分为数个凸多边形。

I will precise this concept of convex / concave volumes later because it's very important, for the moment let's come back to our definition of the portal : in this whole document it means my n-sided flat and convex polygon, but be aware that in other texts it can represent an elementary volume of the scene.

我会在后面详细分析凹凸多面体的概念因为这是很重要的。现在我们讨论入口的定义：这里入口表示一个平面的凸多边形，其他的文献中可能表示场景中间的一个基本的空间或者单元。

Now there is a hyperboloid, a concave ellipsoidal surface and a convex sphere surface need to be done.

现在是一个双曲面，一个凹椭球面，一个凸椭球面

A disclosed example includes a generally concave surface (64) and a generally convex surface (66) along at least a portion of each projection.

所公开的实例包括沿每一突起的至少一部分大体上凹入的表面(64)和大体上凸出的表面(66)。

Convex and concave surface is configured on the LCD panel as the treatment to reduce the reflection of mirror.

在液晶面板表面设置凹凸，以降低镜面反射之处理。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。