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Speckle is also the fundamental uncertainty factor in this kind of sensors. The analytic expression of centroid uncertainty limit is derived from the statistic of laser speckle, and it is shown that the uncertainty limit in RST, and also in anamorphic triangulation, is dependent on the solid angle subtended by entrance pupil as seen from the illuminated laser spot, the triangulation angle, as well as the laser wavelength. The influence of aberration of optical system and surface roughness are also discussed.(4) A method of getting the 3D edge characters based on the integrated vision system is studied.

重点研究了RST中的激光散斑现象，从散斑统计学的角度，首次推导了激光散斑引起的旋转对称三角法位移测量不确定度的极限，结果表明在光学粗糙表面上，该极限由投射激光波长，光学系统入瞳对投射光斑所张的立体角，以及光学系统主光轴与旋转轴的夹角确定；这一结论同样适用于其他变形成像的激光三角法。4基于RST的工作方式，研究了利用集成视觉系统的扫描移动来获得被测物体的低分辨率三维信息的方法。

First of all, some structure parameters, such as the dimension scale of cavity walls, thelocation of primary flow injection holes, the entrance angle of main flow, and so on, havebeen studied, focusing on their influence to the cavity flow field, the forming of vortexes,and the pressure drop in the combustor.

首先研究了模型燃烧器中凹腔长度与前后壁面高度比例、腔内燃料与空气的入射位置、以及主流入射角度等结构参数对腔内流场变化、驻涡形成、以及燃烧器压损等方面性能的影响。

The factors affecting end curl of plate and sheet in rolling process were researched by the cross experiment, which include the upper roll diameter, the lower roll diameter, reduction, angle of entrance and velocity of roll rotation.

用正交实验方法对影响板带材轧制头部翘曲的因素进行了铅板轧制实验研究。影响因素有上下轧辊直径比、压下率、导入角和轧辊转速。

The best technology parameters of rolling 6 mm Pb for experiment milli are 130/130 roll diameter, eduction 5%, angle of entrance -3°, roll rotational velocity 164 rpm.

实验轧机控轧6 mm铅板头部翘曲的最佳工艺参数为上下轧辊直径比1：1，压下率5%，导入角-3°，轧辊转速164 r/min。

Centripetal Converter Blading Theory of sheaf flow of one dimension Entrance and exit Angle difference

七一一研究所；传动技术，，编辑部邮箱 1997年 01期向心式变矩器；叶栅；束流理论；进出口；角度差

Polymer melt ; extrusion swell ; conical short die ; die entrance angle

聚合物熔体；挤出胀大；圆锥短口模；口模入口角

Calculation of teeth profile of disc cutter for arc-gear;2. The formulas for setting angle and entrance angle of disc cutter s are derived by using the contact condition of space curve.

利用空间曲线相切条件导出了用于计算盘形刀具安装角和切入角的条件；该方法具有以下优点：无需知道工件齿形，可同时获得刀具宽度、半径等参数。

The optimal parameters of this subsystem can be gotten by computer computation. The Raman scattering signals can be splitted when entrance angle is about 36o and separation angles of every two prisms are about 106o.

应用计算机对分光系统进行了模拟计算，以实现分光系统参数的最佳匹配：在入射角约为36o，棱镜间的夹角约为106o时，该分光系统可完全分开O2、N2、H2O拉曼信号。

A cat's eye with its holder construction has been designed and applied to the system. Through defining the acceptance angle and the entrance angle of the cat's eye, its reflective characteristic has been analyzed under the condition of practical application.

偏振分光镜、猫眼、波片及调整误差是引起光能损失、导致干涉光强下降的重要原因，通过选用高精度石英λ/4波片、光信号采样用平板玻璃分光镜及镀增透膜等措施，使光能损失大大减小。

It is also a hot college entrance examination.

它同时也是高考的一个热点。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。