system of particles

we will discuss on the following only particle or a system of particles which is subjected to steady, double face and holonomic constraints.

我们只讨论质点或质点系受定常、双面、完整约束的情况。

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This paper points out that the method Lagrange Equations of the second kind for the system of particles from the theorem of kinetic energy is wrong, and analyses the causes of the mistake.

指出从动能定理出发直接推导具有理想约束的质点系的第二类拉格明日方程的方法是错误的，并分析了其错误的原因。

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conditions which limit the motion of a particle or of a system of particles are called constraints of motion.

当约束对质点或质点系的运动情况进行限制时，这种约束条件称为运动约束。

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By adopting blended stock regression design, building particle grade model and optimizing grade ratio, optimum particles grade can be gained, content of solid phase of suspended system can be increased simultaneously.

采用混料回归设计，建立颗粒级配模型，优化级配比例，获得了最佳颗粒级配，提高了悬浮体系的固相含量。

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conditions which limit the motion of a particle or of a system of particles are called constraints of motion.

当约束对质点或质点系的运动情况进行限制时，这种约束条件称为运动约束。

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With the force analysis of collided models and theorem of impulse of a system of particles, the movement trajectory of objects after colliding is calculated.

本文通过对发生接触的模型进行受力分析，运用质点系冲量定理，进而计算出碰撞后物体的运动轨迹。

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Secondly, aiming at the physical phenomenon that vibration of particles in fluctuating wind field, after setting the Nonlinear non-autonomous system model, we studied the dynamic characteristics of periodic vibration, period-doubling bifurcation, QPO, chaos and so on.

其次，针对颗粒在风场作用下来回振动这一物理现象，本文通过建立非线性非自治系统模型并求解，对颗粒的周期运动，倍周期分岔，准周期运动，混沌等动力学特性进行了研究。

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Different dialects have their own system of modal particles.

不同的方言有各自不同的方言语气词系统.

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for a system of particles the sum of the moments of the internal impact with respect. impulses to any center is zero . thus we have.

对于质点系，由于内碰撞冲量对任一点的矩之和等于零，于是有。

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But during its long voyage stardustalso picked up a different type of sample& miniscule particles of interstellar dust that arrived at our solar system from distant stars, lightyears away.

然而在“星尘”漫长的航行中还收集了另一种的样品极微小的星际尘埃，那是来自遥远恒星（数光年外）的微粒。

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The resulting three-component system exhibited an anatase/ rutile ( weight ratio of 73.8/ 26.2) mixed phase structure, narrower band gap ( 2.25 eV), and extremely small particle sizes ( ca. 12 nm) with metallic Ag particles well-distributed on the surface of the composite.

所得三元体系为锐钛矿与金红石混合晶相结构，锐钛矿相与金红石相质量比为73.8/26.2，带隙能窄化到2.25eV，Ag纳米粒子均匀分散在粒子尺寸约为12nm的复合物表面。

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The safeguard system of spatial aircraft provides the semiconductor devices information through detection of the shower particles produced by the electron beam.

空间飞行器防护系统就是利用这一原理，通过宇宙中的电子在飞行器中产生的shower电子，来了解其中半导体器件的有关信息。

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In this paper, the problems of oil pollution examination and wear debris identification are studied in oil pollution on-line monitoring system, furthermore, an analysis system of oil particles pollution is carried out for monitoring the wear debris of an engine bearing test.

本文主要研究油液污染在线监测系统中油液污染度测量和磨损颗粒分类的问题，以及为了对某个发动机轴承试验机磨损颗粒在线监测而开发的油液颗粒污染分析系统。

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Therefore, if, system of particles must be in equilibrium.

故时质点系必处于平衡.

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Results indicate that when particles are moving, the domain of generator is dense in the test function space and the generator of the system is well defined.

试验表明当每次转移多个粒子时，系统生成元的定义域在试验函数空间是稠密的，系统的生成元是适定的。

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