曲率半径

This paper presentes the spherometer of designed with the principle of Archimedes spiral, it has main advantage: both continuity measurement and direct reading to curvature radius of sphere, over against some classical instruments requested the conversion of the measuring result.

本文提出的应用阿基米德螺线原理设计的球面曲率计，克服了某些经典仪器需间接换算测量结果的缺陷，其主要优点是能直接读出所测球面的曲率半径和进行连续性测量，在使用上极为方便。

At the second step, the size of the cutter is computed by the minimum concave radius of curvature estimated by the Euler formula.

根据欧拉方程估算零件的最小曲率半径以确定区域补加工的刀具半径，用二分法估算用于清根补加工的一系列刀具直径。

Concave reflecting surfaces of spherical cap, paraboloid and hyperboloid of revolution are investigated with regard to the dependence of the levitation force on the section radius Rb and curvature radius R of the reflector.

针对球面、旋转抛物面和旋转双曲面三种形状的凹面反射端，系统研究了悬浮力与反射端截面半径R_b和曲率半径R之间的本征关系。

The maximum spherical-head cotter radius was obtained by computing the minimum curvature radios of the cavity surface, and the finish cutter locution data were computed using the equidistant offset surface method.

通过计算型腔曲面最小曲率半径，确定精加工时球头刀的最大允许半径；应用等距偏移曲面法计算出型腔曲面数控精加工刀位数据。

Radius of the Earth: The curvature designed into the faces of the pyramid exactly matches the radius of the earth.

地球半径：进入金字塔的脸上完全匹配地球的曲率半径设计的。

Objective: To evaluate the normal value of radius of corneal curvature of the 3～15 years old children, and the difference in sex and age.

目的：探讨3～15岁儿童正视化过程中角膜曲率半径变化规律及其正常值以及不同性别、不同年龄段角膜曲率差异。

The experiments and simulations are performed by using a conical lens whose radius is 15 mm and basic angle is 1°. The experimental results are compared with the theoretical analysis and computer simulation results. The comparison indicates that the influence of eccentricity on the diffraction mode decreases as the radius of curvature of incidental spherical wave and the propagation distance decrease.

使用半径为15mm，底角为1°的圆锥透镜进行计算机仿真和实验，最后将实验结果与理论分析和仿真结果相比较，证明球面波的曲率半径和出射光束的传输距离越小，偏轴对衍射模式的影响越小。

In this thesis, several kinds of spherical curvature measurement methods are introduced, and the "arch-high and chord-length method" is selected after introduction of the existing methods, and then the novel type of instrument for measuring spherical curvature with the variable ring is developed. In research, the grating sensor, integrated circuits and other new technologies are adopted and integrated. As a result of this, Its specific technical indicator is 0.1um in absolute accuracy, 0.01% in relative accuracy, and 0.001% in repeat accuracy.

本文首先对几种球面曲率半径的测量系统进行了深入的理论分析，在分析了各个测量方法优缺点的基础上，选用了"弓高弦长法"的测量原理，并从理论上推导了本文所述系统的可行性，采用光栅传感器、集成电路等新技术成果，将机械、电子技术、计算机技术以及传感器技术有机结合，研制出一种新型的可变径球面曲率测量仪器。

The analysis shows that vertical growth is achieved thanks to discrete contact points and regions with continuous contact, that the contact pressure creates tension in the stem as observed experimentally, and that there is a maximal radius of the pole around which a twiner can climb.

这个模型可以解释为什么藤蔓不能在半径大于一定值的树干上生长，他们计算出当树干半径大于3.3倍的藤蔓自然曲率半径时，藤的尖端便不能继续缠绕树干向上生长，而是自身卷曲起来。文章的后一页半研究了摩擦力的影响，很明显，摩擦力是使藤蔓植物能够支撑自身重量的主要原因。

And it is also analyzed in detail that on the images of pilled fabrics how the ratio of the edge curvature radius of shaped bar to pills radius affects the distortion of pills either extension or shorten and the conglutination of pills, ie, the projected image of more than one pills superimposed along the lines of sample moving forward.

文中从理论上分析了异型杆边缘曲率半径和毛球半径之比对织物起球图像中毛球的伸缩变形和&粘连&的影响，从而为异型杆半径设计提供了依据。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。