质点运动

In the course of analyses of this paper, a multi-particle structural analytic model is set up. The motion equations of three states of non-affixation, right affixation and left affixation are deduced.

本文按照多质点结构分析模型推导了不附加、右侧、左侧附加弹簧的运动方程，编制了相应的分析程序。

Arbitrary Lagrangian-Eulerian finite element having advantages of two descriptions mentioned above, therefore, used for modelling liquid sloshing motions.

在质点域和空间域之外，引进一个参考域，这是观察者所处位置，使我们得到了任意的运动描述。

In the simulation of the impact of outrunner blocks in debris flow and counter structures, the structure is simplified as a still plane and the block is simulated by a particle with a certain velocity. So the impact force can be expressed by a simple function.

为模拟泥石流大块石对构筑物的冲击，将构筑物假设成静止不动的平面，将大块石简化为以某速度运动的质点，建立基于修正Hertz接触理论的计算模型。

The influence of wave surface boundary layer is very little so it could be ignored in computation.

波浪存在产生的表面和底部的边界层对于潮流的影响，与波浪水质点的运动有直接关系。

In this chapter we develop the implication's of momentum conservation in the motion of a collection of particles.

在本章中，我们要揭示一个质点集体作运动时动量守恒的含义。

, the motion of a particle is referred to by a rectangular coordinate system.

在图6-1中，质点的运动是用直角坐标系来描述的。

By the natural and harmonious relationship between differential forms and differential equations and between differential forms and vector analysis, we discuss the properties, which are covariant under the transformation of coordinates in the framework of differential forms, of particle motion in a central force field .

通过微分形式与微分方程和向量分析之间存在的自然而协调的关系，在微分形式框架下讨论了质点在有心力场中运动的特性并得出在坐标变换下其均是协变的

Firstly, single bubble in the dense zone of fluidized bed was simulated, the second is the curve of the fluid particle, the third is solid space ratio distribution, the fourth is particles velocity vectorgraph and particles volume fraction, the fifth is grain press drop and rapid kinetic energy and rapid kinetic energy dissipation ration.

模拟了反应器中气泡的产生、形成、发展及爆裂，流体质点在运动过程中走过的曲线，炉膛内固相空隙率的分布，床内颗粒浓度场和速度场的分布，床内压降的分布，湍动能和湍动能耗散率。

The analyzing result reveals that the normal motion behavior of stator surface points is not pure planar elliptic, which breaks the concept of elliptic motion usually assumed by many researchers. On basis of these analyses, the criteria of vibration mode select and optimal design are presented for simple-free and free-free supported stators.

首次提出了定子表面质点非平面椭圆运动行为的一般性，打破了国内外学者经常假设的椭圆驱动轨迹的局限性；以此为基础提出了定子在简支和自由边界条件下的振动模式选择和结构参数优化设计的原则。

Firstly, it will consummate MDF fiber separation theory by using for reference of research progeny of paper making field and primarily set up math model of fiber particle's movement in refining plate and draw its movement tracks. At the same time, we use this theory to analysis and contrast four different dentations' refining plates and to validate rationality of this theory and to find the short of these refining plates.

首先，通过借鉴纸浆制备领域在此方面的研究成果，完善了MDF纤维分离理论，初步建立了纤维质点在磨盘间运动的数学模型，并做出其运动轨迹；同时，运用此理论对四种不同齿型的磨片进行了分析、对比，验证此理论的合理性并找出这四种磨片齿型的不足之处。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。