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In general, the curvature radius of the optical fiber must be greater than or equal to 40 mm.

光纤的弯曲半径应大于光纤直径的 20 倍,一般情况下弯曲半径大于等于 40mm,光纤的走线路径上,不能有突出元器件。

Numerical calculation shows that the mean-square radius of gyration of hyperbranched copolymer decreases greatly compared with the analogous linear polymer even if the degree of branching is very small.

这是因为整个体系的Z均均方回转半径不仅和每个分子的均方回转半径有关,还和分子量的分布有关。

The technique of laser light scattering has been widely used in the investigations of biomacromolecule solutions, which can provide some more important parameters such as molar mass, root-mean-square radius of gyration, the second virial coefficients, diffusion coefficients and hydrodynamic radius. Therefore, it is very sutiable for the study of state behavior of biomacromolecule solutions.

激光散射技术在生物大分子溶液性质研究方面的应用越来越广泛,它可以提供大分子的重均分子量、均方旋转半径、第二维里系数、平动扩散系数及平均流体力学半径等重要参数,这对于研究生物大分子的溶液状态行为特别适用。

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。

That is: the optical fibers which are to be tested will wind the same circle according to different radius or will wind the different optical fibers circles according to the same radius, making the direction of incident ray side vibration as parameter, we have done the specific experiments and theory analysis to winding waste of quartz system, both refraction optical fibers and Elastic-optic effect of optical fiber.

即把待测光纤以不同的半径缠绕成相同的光纤圈和以相同的半径下缠绕成不同的光纤圈,以入射线偏振光方向为参数,对单模石英系双折射光纤的弯曲损耗与光纤的弹光效应进行了的具体的实验和理论分析。

It was found that compared to the curvature radius, the equivalent radius of indenter played a much more important role on the nanofretting damage of material.

结果表明,相对于尖端名义曲率半径,压头在一定压入深度下的等效曲率半径是决定材料纳动损伤的更有效参数。

The influence of indentor radius on the plastic deformation has been discussed and some important results are as follows:(1) The influence of the ratio of ceramic coating thickness to indentor radius on the failure of coating, plastic deformation of substrate and crack propagation are obvious.(2)The propagation of crack in ceramic coating is assumes to be of semi-elliptical shape under normal contact with a rigid sphere.(3)Fatigue life of ceramic coating is mainly decided by substrate and load, the lower substrate elastic moduli and load, the more cycles of fatigue.

分析了压头半径对塑性变形的影响,模拟结果表明;(1)陶瓷涂层厚度和压头半径之比对涂层失效、基体塑性变形及裂纹的形成有显著影响;(2)在刚性球压头静态挤压条件下,陶瓷涂层中的预制裂纹按照椭圆形裂纹规律扩展;(3)陶瓷涂层的疲劳寿命与基体和载荷有很大关系,基体弹性模量越小,疲劳寿命延长。

In this paper, an inequality concerning an interior point , the circumradius and inradius of an n-dimensional simplex is obtained.

本文获得涉及n维单形内点、外接球半径与内切球半径的一个几何不等式,它蕴含了n维Euler不等式。

According to the fact that a round of all the points must be inscribed circle round, the black and white points of the edge image were extracted, and a twodimensional array accumulator was established.

根据圆上所有点的内切圆必经过圆中心的事实,提取黑白边缘图像来建立二维数组累加器,依照像素点分布扫描边缘图像,累加器计数,计算出圆心位置,对每个圆心进行半径累积,确定同心圆半径集。

The overcutting on tool end is checked via comparing the tool radius with the circumradius or the radius of inscribed circle, and the touch interference of tool body based on the symbol of the vector distance from the triangle vertex to the tangent plane of tool body column.

在曲面加工的无干涉路径规划中,通过恰当选择刀具初始位置避免了接触点处的曲率干涉;通过比较刀具半径与曲面上三角片外接园半径的大小即可判断刀具底面干涉;而根据三角片顶点与刀杆切平面的有向距离的正负来判断刀杆碰撞干涉。

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