查询词典 rigid body

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。

We suggest that the CPO of amphibole in retrograded eclogites is probably formed by rigid body rotation and dissolution-precipitation creep of elongate amphibole grains in a less viscous matrix of symplectite.

结合光学显微特征观察，本文认为退变质榴辉岩中的角闪石 CPO 主要受其显著的长柱状和针状结晶习性控制，其形成机制为差异应力条件下的溶解－沉淀定向生长，可能伴随有早期的角闪石微晶的刚性旋转变形。

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。

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。

The best result is to return to the warmth of home, in sofas, soft bed with pad and ride the rigid body wrapped themselves into soft and comfortable, the kind of soft feeling of busy office workers, is a warm!

最好的归宿是回到温暖的家中，在沙发、软床上依垫而坐，把僵硬的身体裹进柔软和舒适中，那种柔柔的感觉对忙碌的上班族来说就是一种温暖呢！

On the basis of these method. Coupled with three kinds of problem in linkage mechanism synthesis design such as guidance of rigid body, function and track achievement. The course mainly presents basic theory, analysis method and example as well as nonlinear equation method of settlement in linkage mechanism

结合连杆机构的综合设计：刚体导向、实现函数、实现轨迹三类问题，重点介绍了进行连杆机构综合设计的基础理论、分析方法、分析实例，以及在连杆机构的综合设计中非线性方程的求解方法。

A quarter model is used to simulate for the reason of symmetry. Punch, die and holder pad are regarded as rigid body because of little deformation.

考虑到对称性，取四分之一模型进行有限元模拟，由于凸模、凹模以及压边圈变形都很小，故将其视为刚体。

In this dissertation, a new approach is presented by means of shape of centrodes on moving rigid body. By genetic algorithm, a series of good initial points can be produced automatically.

本文在连杆机构运动分析基础上，利用瞬心线的形状和位置特性确定实始搜索范围，并结合遗传算法的随机搜索特点来构造优化过程。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。