刚体力学

The conclusion is that using well rigid dynamics and spring dynamic characteristic to study large structure dynamics problem is feasible and resultful under the condition of no well-rounded appropriate elastic dynamics theory.

得出的结论是：在柔体动力学理论尚未成熟完善的情况下，运用成熟的刚体动力学理论、弹簧力学特性等理论研究大型结构的动力学问题是可行而有效的方法。

Objective To investigate the effect of posterior pedicle screw instrumentation and determine the impact of alternative surgical strategies to provide guidance for the operation planning. Methods A detailed three-dimensional finite element model of a 40° scoliotic lumbar with pedicle screw instrument were constructed by using the commercial finite element software ANSYS.

目的 通过有限元计算与刚体动力学相结合的方法，模拟后路椎弓根螺钉系统治疗脊柱侧凸的矫形过程，研究矫形过程中的生物力学特性，探讨不同矫形策略对临床结果的影响，为脊柱侧凸的手术规划提供依据。

The paper is based on the multi- rigid bodies systems dynamics and the flexibility polysome systems dynamics as the rationale, uses the related mathematics theory of mechanics and the method inferential reasoning polysome systems dynamics equation.

本文是以吉林省科技发展项目：&具有主动约束阻尼层的柔性机械臂系统动力学研究及其优化控制&项目为依托，以多刚体系统动力学和柔性多体系统动力学为理论基础，利用相关的数学力学理论和方法推导多体系统动力学方程。

It provides not only fundamental principle and analysis of Modern Applied Mechanics and Dynamics but also applications in research areas such as stability, rigid body and rigid-body systems, movements of celestial body and spacecraft, vibration, nonlinear dynamics, et al.

它的研究一方面提供了现代应用力学以及动力学一般理论最基本的原理和方法，另一方面，它本身也给出了在稳定性、刚体与刚体系、天体与宇航器的运动、振动、非线性动力学等领域中一系列有实用价值的成果。

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。