质点

The experiment results prove that this method effectively re— duces the measurement error caused by the uneven distribution of the flow velocity,and increases the accuracy of Doppler uhrason— iC flowmeter.

层流流动时(雷诺数Re#lt；2 300)，管内流体分层流动，各流层之间互不混杂而平行于管道轴线流动，流层间没有流体质点的相互交换。

Additional insight is gained by examining the elastic collision of equally massive particles in the center-of-mass frame of reference.

对质量相等的两质点的弹性碰撞更彻底的理解，可通过质心参照系而获得。

Firstly, a set of elementary maneuvers which find use as candidates for the tactical maneuvers are selected within the bounds of flight envelope.

首先在两机各自极限运动范围内选择一组基本战术动作，这些基本战术动作满足飞机在三维空间内运动的质点动力学方程。

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。

The penalty function is adopted to impose the essential boundary condition, the tensor product weight function with a rectangular influence domain is chosen, and the finite element background cell is considered as the integration unit.

将无网格再生核质点法用于刚塑性可压缩材料轧制过程的模拟，采用罚函数满足本质边界条件，选用矩形影响域的张量积核函数，利用有限元网格作为积分单元，对求解域内和边界上采用不同的高斯积分方案。

Compared with the data provided by the standard graphs and tables of refrigerant thermodynamic properties, the calculation results of this model have certain precision and meet the expectative requirements.Second, a general dynamic distributed model of heat exchangers in automobile air conditioning system is constructed.

建立了具有良好通用性的汽车空调系统换热器分布参数动态模型，并基于流体质点追踪计算思想完成了相应的计算机仿真软件。

Based on numerical calculation, ground movement of underground explosions are analyzed quantatively showing that the maximum velocity of ground particles is subjected to exponential decay laws.

以数值计算为基础，定量分析地下爆炸的地表运动，得到地表最大质点速度的指数衰减规律。

Using oxalate as precursor, Al〓O〓-doped Co powder may contain only face centered cubic Co, i.

掺杂质点进入钴粉的晶格中，使之点阵常数发生了变化。

Two different hypotheses on the quantization of particle motion in the flat space by curved coordinate systems are discussed, and their differences in physical ideas and practical operations are compared.

徐湛讨论了平直空间曲线坐标系中质点运动的两种不同的量子化假设，比较了它们在物理思想和实际操作上的区别和优劣。

Of complex ions with strong chelating properties, which can make suspended particles flocculate and

点或微粒，同时通过黏附、架桥和交联作用使悬浮质点与微粒凝聚沉降。

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。