粒子运动

The length of central region of the cell decreases with the increasing oscillation amplitude and Strouhal number. The movement of Brownian particles can be either periodic or chaotic from whichever region the particles originate.

模拟结果表明，涡胞中心区质点的运动有强周期性，轨迹呈螺旋形状，而边缘区质点的运动是一种混沌行为，两区的质点被分界线隔开；中心区宽度随振幅、Strouhal数的增大而减小；布朗粒子的分子扩散效应可以克服两区分界线的限制。

The structure of cometary dust tails is studied in the frame of mechanical theory with special regards to threedimensional treatment of the problem.

考虑粒子的三维运动及其运动范围，使过近日点后的尘埃彗尾出现一"颈线结构"。

According to the missile trail with preset curvilinear motion, the missile exhaust plume is simulated by using particle system.

根据预置曲线运动导弹的轨迹，应用粒子系统对曲线运动导弹的尾焰进行模拟研究。

The motion of a electric particle in an attractive Coulumb field and a strong homogenous magnetic field, i.e., the diamagnetic Kepler problem, was also studied.

我们还探讨了一个带电粒子在吸引的库仑电场和一个强均匀磁场中的运动，这个模型对于讨论从规则运动到全局混沌很有意义。

In Newtonian mechanics, the motion of the charge in magnetic field is in equidistance helical line. It is composed of the uniform motion in magnetic field and the circular motion vertical to the magnetic field.

带电粒子在磁场中的运动，如果用经典力学分析，它做等距螺旋运动，是在垂直磁场平面内两个相互垂直方向的简谐振动和沿磁场方向匀速运动的合成。

Knowing how the particle moves, we should like to picture its motion once more.

知道了粒子是怎样运动的，我们就能再一次把它的运动画出图来。

The paper are studied dynamics characteristic of IR smoke under entironment to vacuum and micro-gravitation,based maths-model of thermodynamic onflow pervasion by smoke formed, the experiment proves that the movement speed of smoke gradually minishes along with hoist of vacuum.The process after smoke formed analysed ,which proves that its movement rule relates hilum of particle.

本文对真空和微重力环境下的红外烟幕进行了动力学特性研究，建立了烟幕形成过程中的热力湍流扩散数学模型，通过实验表明随著真空度的升高，烟幕的运动速度逐渐减小；并对烟幕形成后的过程进行了分析，结果表明其运动规律跟粒子的粒径有关。

These systems include neutral particles with general spin and magnetic moment moving in an arbitrarily varying uniform magnetic field or in the field of a circularly polarized electromagnetic plane wave, the generalized time-dependent harmonic oscillator, and Heisenberg model in a rotating magnetic field.

包括具有一般自旋和磁矩的中性粒子在任意时变均匀磁场中的运动、在圆偏振平面电磁波场中的运动，一般含时谐振子体系，旋转磁场中的 Heisenberg 模型等。

Each collision, particles are changing the state of motion, thus exacerbating the random nature of the movement.

每次碰撞，粒子都改变运动状态，从而加剧了运动的无规性。

The DSS of a moving spherical particle is explained by the electric and magnetic field from Mie scattering theory.

首次利用Mie理论，详细的研究了高速运动介质球的散射特性，得到了运动介质球粒子散射截面的解析表达式。

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。