查询词典 polyhedral angle

The mechanics model of a ball screw was developed considering the factor of lead angle,and the main curvature of the helical surface was deduced using differential geometry method,and the effect of lead angle on the elastic deformation was analyzed.

考虑螺旋升角的因素，建立了滚珠丝杠副的受力模型，应用微分几何理论推导了螺旋面的主曲率，并进一步分析了螺旋升角对滚珠丝杠副弹性变形的影响。

Lastly, experimentations are carried out on Chaochai 6102BQ engine and the data of the thermal parameters according to different oil-apply lead angle is derived. The influence of the change of oil-apply lead angle on the rate of heat release is researched, then a reference is provided for building an accurate heat release model.

最后，在朝柴6102BQ柴油机台架上进行了试验，对不同供油提前角下柴油机的热工参数进行实机测试，对试验结果进行了处理、分析，研究了供油提前角的改变对放热规律的影响，为建立该故障下的燃烧放热模型提供参考。

Because the increasing of dip angle can lead to special strata behavior which cause difficulties to mining, The strata behavior theory can not be simpely borrowed from that of flat and gently inclined seams. In order to cut down roof accidents and increase production efficiency, the strata movement and stress distribution must be reassessed for seam with deep dip angle.

煤层倾角增大带来了矿压显现的特殊性和开采上的困难，不能再简单地借用水平和缓倾斜煤层的矿压理论，而必须对大倾角煤层围岩运动与应力分布予以重新评价，以降低顶板事故，提高生产效率。

At present, China Excellent javelin thrower lower limb segment placed before the positive tread in the poor backward angle variations of the trunk is small, the level of Pull angle fluctuations, lead to physical decline in the focus of the horizontal velocity, cross-step and go beyond the combination of devices is not ideal, beyond the equipment is not sufficient.

目前我国优秀标枪运动员下肢环节的积极蹬地前摆欠佳，躯干后倾角度变化幅度小，水平拉引角波动较大，导致身体重心水平速度下降，交叉步与超越器械的结合还不理想，超越器械不充分。

Based on the method of minimum deviation angle, man can obtain the accuracy of measuring refractive index of glass at 3×10-6 with fine apparatus for measuring angle, but the classical princip1e formula quote...

计算表明，用经典公式计算标准试样折射率虽然对光学系统象差影响很小，但作为折射率基准测量，这样大的原理公式误差是不允许的。

A method of right angle auxilliary projection on an arbitrary plane is provided, by which the dihedral angle can be obtained directly.

提供一种在一般位置平面上的直角辅助投射方法，直接求两面角，具有概念明确唯一，作图方法简单，可以适应钣金划线工作中制造卡角样板的实际需要。

Normal the angle of incident and the angle of reflection

认识光反射的规律，了解法线、入射角和反射角的含义。

The angle between the reflected ray and the normal is called the angle of reflection.

在反射线和法线间的角称为反射角。

The kinetic characteristics of the wide angle seismic signal and the effect of the wide angle reflection for noise have been analyzed by the forward theoretical model.

利用正演理论模型分析了广角地震信号的运动学特徵以及噪声对广角反射的影响。

Part of the light ray is reflected back into the first substance, with the angle of reflection equaling the angle of incidence.

当光打在二透明物质间的介面时，光分成二部份

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。