旋转运动

In this paper a modified centroid coincidence theorem and a motion parameter decomposition theorem are introduced,which degenerate it into a pure rotation problem with only 3 degrees of freedom.

最优运动估计本质上是6自由度的非线性问题，本文提出推广的质心重合定理和运动参数分解定理，将其简化成3自由度的纯旋转问题。

The initial condition, the velocity and diameter distribution of the droplet have been studied.

以旋转床中液滴的运动模型为基础，对气液运动情况进行实例分析和计算。

The results also present that the intermaxillary vertical relation has significantly positive relation with the motion magnitude of the tongue movements; however, the cranial base (component 1) and the maxilla (component 2-4), except the palatal depth, show no correlation to swallowing. Furthermore, arch length is found increased with prolonged duration of swallowing.

在齿颜面形态方面，以上下颚骨垂直关系及下颚第一大臼齿萌出度，和舌头吞咽运动的相关性最为显著，但在离舌头较远处的颅底以及上颚骨的前后、垂直与旋转关系，与舌头吞咽运动较无关联；随著牙弓长度的增加，在晚期终止期的吞咽持续时间会延长。

The heat generation curves of seven rubber materials used in tires with the changes of temperature have been obtained by using Dynamic Mechanics Analysis technique on NETZSCH DMA242 instrument, knowing that the heat generation of every other rubber materials except inner liner rubber changes lightly alone with the temperature within 10℃～80℃. According to the Fourier law, the heat transfer coefficients of tire rubber are measured by stable method on self-made experiment instrument. The coefficients changes lineally within 20℃～80℃ and the relation formulas λ=λ〓+bt are given out attached with λ〓 and b. The specific heat of tire rubber are measured on Differential Scanning Calorimeter NETZSCH DSC204 and the relations with temperature are linear and the formula is c=c〓+bT, where c〓 and b gained from experiment result data are presented in the paper. The heat convection coefficients on the surface of rolling tire are measured according to the principle of heat-mass transfer analogy principle after simplifying rolling tire into rotating disk with straight movement on wind channel. The relation with rotation speed of disk is linear as h=5. 399+0.0258n and the relation with straight line speed of tire is linear too, h=

论文采用动态力学分析技术，使用NETZSCH DMA 242型实验仪，获得了轮胎用七种胶料的生热率随温度变化曲线，确知除内衬层胶以外，其它各种胶料在一般胎温范围内（10℃～80℃）的生热率随温度变化不大；轮胎胶料的导热系数根据傅立叶定律的基本原理，采用稳态法在自行搭建的实验台上进行测试，结果表明，材料的导热系数在20℃～80℃的温度范围内随温度呈线性变化，论文给出了各种材料导热系数的线性变化的关系式λ=λ〓+bt及其λ〓和b的值；轮胎胶料的比热运用差式扫描量热原理，在NETZSCH DSC204型DSC实验仪上进行测试，结果表明，胶料的比热随温度的变化呈线性变化，其关系可用c=c〓+bT表示，文中给出了根据实验数据拟合的c〓、b的值；对轮胎表面的对流换热系数的测定，本文先将滚动的轮胎简化为有直线运动的旋转圆盘，而后采用萘升华热质比拟技术，在风洞中测量了滚动轮胎表面的对流换热系数，结果表明，圆盘表面对流换热系数与转速呈线性关系，即h=5.399+0.0258n，轮胎表面对流换热系数与其直线运动的速度呈线性关系，即h=

After introducing the basic knowledge of geometric algebra such as outer product,inner product and geometric product,this paper focused on the CGA description and computation with graphic reflection,rotation,translation,rigid body motion and screw motion,and gave the experimental demonstrations.

在简单介绍外积、内积和几何积等基本概念之后，重点论述了共形几何代数在图形反射、旋转、平移等变换和刚体运动、螺旋运动等方面的描述和计算方法，并给出了实验示例。

These systems include neutral particles with general spin and magnetic moment moving in an arbitrarily varying uniform magnetic field or in the field of a circularly polarized electromagnetic plane wave, the generalized time-dependent harmonic oscillator, and Heisenberg model in a rotating magnetic field.

包括具有一般自旋和磁矩的中性粒子在任意时变均匀磁场中的运动、在圆偏振平面电磁波场中的运动，一般含时谐振子体系，旋转磁场中的 Heisenberg 模型等。

Graphic part of the emblem, that is, red, blue, green, three-color composition of the "" shape, with the strokes of calligraphy show a movement of the human form, as if a forward leap of gymnasts, and if one is the pommel horse on the air rotating athletes , Embodies the concept of the campaign.

请帮我翻译一段话会徽图形部分，即由红、蓝、绿三色构成的"之"字形，以书法的笔触表现出一个运动的人形，仿佛一个向前跳跃的体操运动员，又如一个正在鞍马上凌空旋转的运动员，体现了运动的概念。

For optimization parameters in structure and motion,the experimental method for the five-factor quadratics rotary orthogonal combination was adopted,and two evaluation indexes(mixing homogeneity and material powder) were applied in the experiment.

为了优化其结构与运动参数，采用二次回归正交旋转组合试验设计对5个试验因素进行了混合均匀度及物料细粉率作为指标的试验研究，得出了其结构与运动参数的合理组合，即揉搓转子转速宜取40~50 r/m in、剪切转子转速宜取55~65 r/m in，转子间隙宜取11~13 mm，齿杆角度宜取5~°10，°混合时间宜小于10 m in，充满系数不应小于0.1。

So this model is a much more exact description of actual motion includes translation, defocusing, especially the serious distortion caused by rotational motion and multi-optical-axis change.

该模型包含了全面的运动信息，包括图像的旋转、散焦、平移以及多光轴运动引起的透视变换等。

A new analytic scheme for solving the inverse kinematics equations of CRS robot manipulator was presented by the shift of the joint coordinates and the rotation coordinate system, which were significant to optimize the robot motion and path planning, and the formulas of calculating the sine and cosine of each rotate angle variable were solved.

通过关节坐标的转换和旋转坐标系统的引入，给出了CRS机械手逆运动方程求解的一种新解析法，直接推导出各个关节转角变量的反三角公式，为机械手的运动优化和轨迹规划创造了条件。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失