Because there is no abrasion between the concave and convex, the nut is reusable.
由于凹面与凸面之间没有磨损，螺母可以重复使用。
A small curve in the sliding part of the convex top of the lower nut acts as the wedge.
下螺母凸顶的滑动零件上有一条小弧线充当楔块。
It is locally convex in the sense that it has no loops and the curvature never changes sign.
它的局部是凸的，因为它没有环路，且曲率永远不会改变符号。
They're lenses because they're convex vessels, and when they're full of water, they act as a lens and you see the horizon in them, upside down and backwards.
它们是透镜，因为它们是凸面容器，当它们盛满水后，它们可作为透镜使用，你可以看到它们里面上下颠倒的地平线。
Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.
水从叶子内部的细胞涌向外面的细胞，导致叶子迅速地从凸向凹翻转，就像一片柔软的隐形眼镜。
Each cell in a Voronoi tessellation is a convex polyhedron.
泰森多边形法中的每个细胞镶嵌是一个凸多面体。
Concavo-convex veins are always used in the design of woolen sweater.
凹凸纹通常用于羊毛衫的设计中。
The relation between the completeness of several local convex topology and that of induction topology was pointed out in this paper.
指出了几种局部凸拓扑的完整性与感应拓扑的完整性之间的关系。
TheNavMesh stores this surface as convex polygons.
导航网格把这个表面存为凸多边形。
A single convex lens is used to produce an enlarged image.
能够产生放大图像的单个凸透镜。
'It's all about having those convex surfaces to reflect light,' he trills.
“那就是用这些凸面来反光，”他说。
Linear programs with several reverse convex constraints are discussed.
讨论带有多个反凸约束的线性规划。
Just as a double convex lens enlarges so a double concave lens reduces.
正象双凸透镜可以放大那样，双凹透镜也可以缩小。
A convex lens causes rays to converge on a single point, the focal point.
会聚透镜使光线会聚于一点，即焦点。
The inferior and lateral convex border of the stomach is the greater curvature.
胃的下方及侧面凸缘是胃大弯。
Putting water into the lens' chamber turns the normally flat lens a convex hemisphere.
将水注入镜头的腔中时，会把平时平面的镜片变成凸出的半球。
Let us look first at the convex mirror, perhaps the most famous mirror in all art.
首先让我们来看凸面镜，这可能是所有艺术作品中最著名的一面镜子。
The core is a set which satisfies a system of weak linear inequalities, so it is closed and convex.
中心是一个满足弱线性不等式的合集，因此它是封闭的、凸的。
The hardness of convex hull is higher than that of pit portion on the sculptured leaf surfaces.
植物非光滑叶表形态中凸包处硬度较凹坑处的硬度大；
Convex Cuts: Tips and techniques for creating sharp, convex details in geometry under subdivision.
凸形切割：在细分下在几何形状中创建尖锐，凸形细节的提示和技术。
In this paper it is improved appropriately and applied to the convex integer programming problems.
本文对其做适当改进，用于解凸整数规划问题。
We prove that the Lagrangian dual bound is identical to the lower bound obtained by convex relaxation.
并且证明了拉格朗日对偶界与通过凸松弛得到的下界是相等的；
As seen here, some sapphires, when cut to a convex shape, exhibit a striking six-pointed star in direct sunlight.
正如我们所见，被切割成凸镜状蓝宝石会在阳光直射下呈现出一个六角星。
For this reason, any large, flat areas should be crowned convex to prevent dishing in the reverse direction.
同样原因，较大的平坦表面应稍拱起以避免在相反方向凹下。
Finally, optimality necessary and sufficient conditions for nonlinear convex semidefinite programming are proved.
并给出了非线性半定规划的最优性必要和充分条件。
The special meshing of convex and concave teeth profile makes the relative radius of curvature of the contacting point longer.
独特的凸凹啮合齿廓，使两齿轮在接触点处的综合曲率半径较大。
Many scientific, engineering and economic areas involve the optimization of complex, nonlinear and possibly non-convex problems.
科学领域，工程领域和经济领域都涉及到很多复杂的、非线性的甚至非凸形式的最优化问题。
In this paper, we propose a new trust region algorithm for solving a class of composite nonsmooth optimization subject to convex constraints.
提出了求解一类带一般凸约束的复合非光滑优化的信赖域算法。
In this paper, we propose a new trust region algorithm for solving a class of composite nonsmooth optimization subject to convex constraints.
提出了求解一类带一般凸约束的复合非光滑优化的信赖域算法。
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