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。
It is locally convex in the sense that it has no loops and the curvature never changes sign.
分析了挤压翻边与传统翻边应力状态的不同之处，以及翻边凸模的冲头曲率半径对翻边效果的影响。
The differences of stress state between extrusion-flanging and traditional flanging, and the influences of curvature radius of burring punch on flange height were analyzed.
本文研究常曲率平面上的凸集，研究常曲平面上的凸集方法。
In this paper we investigate the convex set in a plane of constant curvature.
提出的内凹的盘铣刀铣可加工凹曲面又加工凸曲面。通过改变刀盘曲轴线与曲面的截线和刀盘半径有相同的曲率和曲率导数。
This paper presents a new method in which the disc cutter always has the same curvature and the curvature differential with that of the surfaces being machined.
形状不良随板料厚度的增加、压边力的增加、屈服强度的降低、凸模曲率半径的减小而减小。
The shape defect is decreased with increasing sheet thickness, increasing binder force, decreasing yield strength, and decreasing curvature radius.
所述铰链具有中心部分（50），在盖闭合时并且从侧面正视图观 察时中心部分（50）具有凸的外表面，所述凸的外表面以平滑曲率融入所述盖和所述基体的外表面。
The hinge has a central portion (50) with a convex outer surface, with the lid closed and as viewed in side elevation, that blends with a smooth curvature into outer surfaces of the lid and the base.
通过确定凸、凹弧段的最小曲率半径，结合此弧段范围内中间架的有效处理，既达到了胶带平稳运行的目的，又降低了加工制造和安装的难度，取得了很好的效果。
At the moment, through the calculation of minimum curvature radius and dealing well with single middle shelf, belt conveyor can operate commendably and can be processed and installed easy.
通过确定凸、凹弧段的最小曲率半径，结合此弧段范围内中间架的有效处理，既达到了胶带平稳运行的目的，又降低了加工制造和安装的难度，取得了很好的效果。
At the moment, through the calculation of minimum curvature radius and dealing well with single middle shelf, belt conveyor can operate commendably and can be processed and installed easy.
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