曲率

By sky or ground wave propagation, the detection range of the HF radars breaks through the limit of the curvature of the earth, which makes it possible for long-range air early-warning and target monitoring. At the same time the unique abilities in detecting low-detectable targets of the HF radars makes them powerful equipments for detection of hermit aircrafts, small airplanes in heavy land and sea clutters, and even intercontinental missiles.

借助于天波或地波传播方式，高频雷达的探测范围突破了地球曲率的限制，因此使远距离空中预警和目标监测成为可能，同时高频雷达所具有的独特和良好的对低可探测性目标的探测能力，使之成为探测隐形飞行器和处于强地杂波和海杂波背景中的小型军用飞机、巡航导弹等贴地、贴海飞行的小目标及洲际导弹进行有效探测的有力装备。

In consideration of the problem of drill pipe bending steering in radial horizontal well drilling, ANSYS software is used to simulate its major influencing factors, such as slideway trajectory curvature, clearance, working pressure, roller shape and position and thickness of drill pipe by establishing a finite element model for the bending steering mechanism.

针对径向水平井钻进中钻杆弯曲转向前进运动困难的问题，通过建立弯曲转向机构仿真有限元模型，对其主要影响因素：滑道轨迹曲率、间隙、工作压力、滚轮形状与位置和钻杆壁厚等用ANSYS软件进行仿真研究。

A new auto-stepping scheme based on the curvature of the solution curve is proposed, with which the course of tracing the nonlinear solutions will become more reasonable and more efficient.

对增量-迭代过程当中的弧长控制方法和迭代方法分别进行了深入研究，取得的成果有：1）提出一种新的弧长控制方案，消除了以往方案存在的漏洞。2）提出一种基于解曲线曲率的自动走步方案，使得整个的非线性追踪过程合理化，从而极大地提高了效率。

In this paper a framework is built for differential quantity calculation on spatial curves of point cloud and a new matching method for given point curves is proposed.

建立了点云几何分析的相关理论框架，即定义和计算点云潜在曲线的几何微分量，包括Frenet标架、曲率、挠率等；在此基础上提出一种新的点云空间曲线匹配方法。

He cast a two-inch mirror blank of speculum metal and ground it into spherical curvature.

他投下了2英寸的一面镜子，空白speculum金属和地面成球面曲率。

What changes are necessary when a spherical curvature is introduced in the substrate?

当一个球面曲率引入基底时需要有什么改变？

At present, the measurement instrument of spherical curvature is developing towards miniaturization, automation, modular, and high-precision direction.

目前，球面元件曲率半径的测量仪器正在向着小型化、自动化、模块化、高精度的方向发展。

In addition, the working principle of the instrument for measuring spherical curvature is described, and the scheme of structure base on this working principle is designed, and then the accuracy analysis of it is proved in details.

文中详细阐述了可变径球面曲率测量仪器的工作原理、系统选型、结构设计，并详细对测量仪器进行了精度分析及精度综合，指出了影响仪器测量精度的重要因素。

For easier comparison a modified Dean number was proposed, which took into account the curvature of the spherical line cut out by the helical element from the tubular housing.

为了更简易的比较，本文提出了 Dean 数，用来考虑管路外壳上的螺旋物切出的球形线的曲率。

Single curvature polyhedron ; Spherical tank ; High temperature bulging ; Temperature distribution ; Numerical simulation

单曲率多面壳体；球形容器；高温胀形；温度场；数值模拟

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。