刚体

This technique,called the rotation operator approach,disentangles the propagator into a rotation operator and,consequently,shifts the cumbersome time-ordering problem into solving the characteristic equations equivalent to the Euler geometricequations long known to describe the motion of a rigid body.

它把相应的传播子分解为量子力学中的空间转动变换算符，把复杂的时序问题转变为求解对应的特征方程，而这些特征方程恰好与描述刚体运动的Euler几何方程完全等价。

A lot of plates, the relative motion between the plate is the most basic rigid body sport

岩石圈被断裂分割成许多板块，板块之间的相对运动是最基本的刚体运动，包括直移和旋转。

Understanding of performance concepts such as overdraws and batch sizes, and how they pertain to particle effects.

熟知3dmax和maya的粒子系统，场，表达式，脚本，柔体，刚体以及布料动力学。

Screw compensation algorithm including coning and sculling compensation s reduces the noncommutable error caused by rigid body .

设计的螺旋补偿算法包括了传统的圆锥补偿和划船补偿，有效地减小了刚体转动的不可交换性误差。

In the first place, the normal flexible body dynamics modelling method of continous system is built based on hamilton principle. And then taking the flexible beam tunning in the horizontal plan for example, in the assumption of Euler-Bernoulli beam,the identical linearilized vibration differential equation is deduced according to geometry constraint conditions .

首先基于Hamilton原理建立起一般柔性体连续系统的动力学建模方法，进而以水平面内作大范围回转运动的柔性梁为例，在Eu1er-Bemoulli梁模型的假设前提下，根据轴向不可伸长的柔性梁的几何约束条件，推导出作大范围刚体运动的柔性梁连续系统的一致线性化振动微分方程。

In this paper rigid block limitting equilibrium method is used to calculated Xiluodu arch dam abutment stability and the abutment stability is analysed and assessed.

采用刚体极限平衡法对溪洛渡拱坝坝肩稳定进行了全面计算，对坝肩稳定进行了分析评价。

The stress and stability analysis of arch dam and abutment are the main task of traditional arch dam design. Nowadays there are two kinds of analysis method to use. One method is the arch-cantilever load-distribution method, in which the arch dam stress and abutment thrust are calculated, while the stability of abutment is evaluated by rigid body method or other method. The other is FEM method, which evaluates the arch dam stress and stability of abutment at the same time.

作为拱坝常规设计的主要任务—坝身和坝肩的应力和稳定分析，当今大体有两套体系可用：①用拱梁分载法分析坝身应力和坝肩推力，结合刚体法或其他方法进行坝肩稳定审核；②用有限元法对坝身应力和坝肩稳定同时进行审核。

In this paper, firstly according to 4 kinds of choosing scheme with hole line arrangement of leading hole of extension project, with the way of rigid body limit balance, plane limited and three-dimensional un-line limited carry out right bank dam abutment stabilize analysis calculation, calculation result show 4 kinds hole dig scheme enforcement right dam abutment side slope basically can satisfaction stabilize service requirement.

本文首先分别针对扩建工程的四种引水隧洞洞线布置备选方案，采用刚体极限平衡法、平面有限元法和三维非线性有限元法进行了右坝肩边坡稳定分析计算，计算结果表明四种洞挖方案的实施右坝肩边坡基本上都能满足稳定运行要求。

While by introducing the spherical simplex UT, a better-behaved sigma point selection strategy, the number of sigma points required to the same transformation accuracy can be dramatically reduced, and accordingly, the computation burden can be avoided.

在有陀螺模式下，设计了基于误差修正罗德里格参数的SUKF姿态估计算法，在计算过程中同时能够保证四元数始终归一化。在无陀螺模式，基于MRPs的姿态表示和卫星刚体动力学方程，实现了SUKF姿态估计算法。

Firstly, took the data of body model and garment model, and then finished the match with the curvature feature of triangular mesh by making mapping between body model and garment model, this process was a rigid transformation. In fact, it comprised the rotation matrix and translation vector. Finally, under the VC6.0, set up the platform of 3D clothing fitting by the super 3D building of OpenGL.

首先提取Poser 6.0中的三维人体模型和服装模型数据；然后通过三维网格模型的曲率特征在人体模型与服装模型之间建立映射关系来完成匹配，这个过程是一种刚体变换即获取旋转矩阵和平移矢量两部分；最后在VC++6.0的开发环境下，利用OpenGL强大的三维建模功能实现了三维试衣平台的搭建。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。