粒子运动

A bluebottle path described by a particle, such as a sand grain in the rock, it would be more like that of a bluebottle buzzing round the room; it would be up and down, to and fro and from side to side.

假如我们真能看到诸如岩石中一个沙粒子的运动轨迹，那就像一只嗡嗡叫的绿头苍蝇在屋内飞行的轨迹，呈现出上上下下、来来回回、左左右右3种性质的运动。

If we could actually see the path described by a particle, such as a sand grain in the rock, it would be more like that of a bluebottle path described by a particle, such as a sand grain in the rock, it would be more like that of a bluebottle buzzing round the room; it would be up and down, to and fro and from side to side.

假如我们真能看到诸如岩石中一个沙粒子的运动轨迹，那就像一只嗡嗡叫的绿头苍蝇在屋内飞行的轨迹，呈现出上上下下、来来回回、左左右右3种性质的运动。

C If initially both particles are moving with given momenta, find a way to convert the problem into the case described in.

如果开始时两粒子都在运动，它们的动量已知，求一方法把问题转化为的情形，即一粒子初始是静止的。

It can be found that the nano-SiO2 does not behave as the nucleating agent in PET which is mentioned in some reference.

与微米粒子不同，PET/纳米体系中的所有纳米粒子的运动是长程关联的。

The numerical results show that, after several microseconds, the charging process of dust particle reaches equilibrium.

结果显示，经过几个微妙，尘埃粒子的充电过程就能达到稳定；特别的是尘埃粒子在鞘层中的运动过程是衰减振荡的，并最终悬浮在其平衡位置处。

According to the force that the dust granule bears in the pulse electric field electrically charged process and the movement differential equation ,dust collecting efficiency of the dust granule in static electricity dust remover that is supplied by the high-pressured pulse is obtained.

根据粉尘粒子在脉冲电场荷电过程中所受力的作用及运动微分方程，推出了粉尘粒子在高压脉冲供电静电除尘器中的收尘效率，并依据公式说明了除尘过程中各个参数对除尘效率的影响。

We use the single particle model and find a new nonlinear resonant acceleration criterion analytical: nw(1)+mw(2)=NW, m,n,Nare integers, w(1,w(2), W are the frequency of the two waves and the charged particle cyclotron respective,this result can be extended to the multiple waves ,we make numerical simulation and numerical results are consistent with the analytical results. This paper consists six chapters.

因此本文从基本的情况开始，以两个静电波与磁化等离子体相互作用问题为研究出发点，通过多标度展开的理论方法，求解带电粒子的运动方程，得到的一个新的非线性共振加速条件：nw(1)+mw(2)=NW，（m，n，N为整数，W，w(1)，w(2)分别为带电粒子的回旋频率以及两个静电波的频率），该结果可以推广到多个静电波作用于磁化等离子体的情况，随后通过数值计算证实了解析结论的可靠性。

The particle valve model,obstacle cell valve model as well as the body-fitted valve model representing the valve motion were established.Furthermore,a modified equation about the particle valve model was put forward.

建立了反映气门运动的粒子阻滞模型、障碍物单元模型以及贴体气门模型，并提出计算粒子阻滞的修正公式。

For this project, in virtue of the experimental observations on the vertical vibrator,the invert torsion pendulum and the vertical pipe with capillary outlet,and by using numerical simulations of the discrete element method, the mixing and segregation of granular materials of spherical and neraly spherical shape with the different size and different density under the vertical vibration or parallel shear motion have been researched, and the relationship between the macroscopic segregation properties and the microscopic characteristics of granular materials and the outer actions has also explored. The theoretical model and method describing the mixing and segregation of granular materials is developed.

本项目通过在垂直振动台、倒扭摆、带毛细出口的竖直玻璃管等装置上进行实验观测，并采用以离散元方法为主的数值模拟，研究了具有不同粒子尺寸、密度的球形或近球形颗粒物质在具不同结构形状容器中垂直振动和剪切运动时的粒子混合和偏析情况，探索颗粒材料流的宏观偏析特性与微观特征量及外部作用间的关系，发展描述颗粒物质混合和偏析的理论模型和方法。

Between above two cases, if the single particle collides with the crowded-particles in one, or two dimensional-links, their motions might obey either energy, or momentum conservations.

介于上述两者之间，一个单粒子与一维紧密相连的粒子群的碰撞运动，不是动量守恒可以忽略，就是能量守恒可以忽略。

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。