质点

Considering this and comparative analysis, orthogonal list is used to storage coefficient matrix, and Improving Gaussian Elimination Method is used to numerically calculate dynamical equation. Therefore, nodes positions and the real-time moving states of model can be obtained in this way.

此外，本文分析了用于柔性体建模的几何方法、物理方法后，将较为可行的基于弹性理论的弹簧-质点模型引用到充气膜结构的充气过程模拟中，从而可以有效的模拟三维充气膜结构。

Taking generalized coordinates for variables, the differential equations of multiple elastic particles are decomposed into the differential equations in the independent form by introducing generalized coordinates .

通过广义坐标的引入，将多质点弹性体系的运动微分方程分解成以广义坐标为变量的独立微分方程形式。

The results go as follows: by adopting the 3D FEM model, the more complete and accurate results can be obtained and the analytical result is lower than particle model.

分析结果表明：采用三维杆系有限元模型能够更全面、准确地反映隔震结构的地震反应性能，计算结果低于层间质点模型计算结果。

Newton's law of gravitation refers to the force between two particles.

牛顿的万有引力定律指的是两个质点之间的力。

They were also used, for example, to determine the gravitational attraction exerted by a lamina on particles.

他们也用来确定一个薄片作用在一个质点上的万有引力。

The data mining algorithm, which calculates the radius of gyration of unit-mass point around the centre of mass in the phase space, can distinguish the fault parameter from the chaotic time series output by the tested system.

提出了一种基于相空间重构和数据挖掘算法的复杂电子系统故障诊断方法，采用计算相空间中各个单位质点绕其质量中心的旋转半径的数据挖掘算法识别被测系统的故障参量。

B.In simple harmonic motion,where there is no damping,the energy of the vibrating patticle

在没有阻力的简谐运动中，振动质点的能量由动能变为势能，或由势能变为动能，但总能量不变。

2In simple harmonic motion,where there is no damping,the energy of

在没有阻力的简谐运动中，振动质点的能量由动能变为势能，或由势能变为动能，但总能量不变。

2In simple harmonic motion,where there is no damping,the energy of the vibrating particle changes from kinetic to potential and back,with the total energy constant.

在没有阻力的简谐运动中，振动质点的能量由动能变为势能，或由势能变为动能，但总能量不变。with 十名词十形容词的复合结构在句中有结果状语的意味。

A new cermet sinter with through micro-porous structure was developed by vacuum liquid phase sintering method, in which Al2O3-Ni-Cr-Mo-Si-Fe powder was used as the basic material, TiH2 and CaCO3 were used as the composite pore-forming materials and hominess grains was used as dispersal particles. The cermet sinter was then infiltrated with Ag-Cu-Pb-Sn at vacuum and formed a new high temperature self-lubricating material.

以TiH2和CaCO3为复合造孔剂，以硬质微细颗粒为惰性弥散质点，采用真空烧结法制备出具有贯通型微孔结构的Al2O3-Ni-Cr-Mo-Si-Fe系金属陶瓷烧结体，并在烧结体中浸渍Ag-Cu-Pb-Sn系浸渍型固体润滑剂制备出新型高温扩散自润滑材料。

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。