查询词典 particle

Based on the comparison with particle swarm optimization algorithm,quantum particle swarm inversion algorithm is studied in this paper.

在与微粒群算法进行比较的基础上，研究了量子微粒群反演算法。

Quantumbehaved particle swarm optimization developed on the basis of classical particle swarm optimization is a method with better convergence and stability.

量子粒子群优化算法是在经典的微粒群算法的基础上所提出的一种有较高收敛性和稳定性的进化算法。

By means of the fractions of the equation of the non一ideal constrained motion of the particle along the plane curve on the tangential direction and normal direction,the motion speed expression of the particle under this condition is derived,the constrained counter force is further gained,thus some non一ideal constraint problems are solved from the given angle.

通过质点沿平面曲线的非理想约束运动方程在切线和法线方向上的分式，导出质点这一条件下的运动速度表示式，并进一步求出其约束反力，从一定角度解决一些非理想约束问

Every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

这种力与各质点的质量的乘积成正比，与它们之间距离的平方成反比。

The code work was included in programming of thermonuclear reaction and α-particle heating and techniques used in 1D and 2D ignition simulations. The 1D simulation result agreed well with the self-similarity solution of α-particle heat conduction.

论文程序工作主要完成了热核反应和α粒子加热部分程序模块的编制，并解决了直接驱动一维和二维点火模拟中的一些技术问题，所编程序的一维模拟结果与α粒子热传导自相似解很好地相符。

Experimental results indicate that for the polystyrene particle with a larger size, Umf changes with p-0.3, and for the sand particle with a smaller size, Umf changes with p-0.21. An empirical equation about Umf is proposed based on the experimental data: Umf=μdp ρg｛［(34.15)2+0.05916×dp3 ρggμ2］12-34.15｝ It is found that the bed expansion height increases with the increasing of gas velocity, and increases with pressure for fixed value of UUmf, when the pressure exceeds 0.7MPa, the influence of pressure on the bed expansion height is weakened.

研究结果表明，大粒径聚苯乙烯颗粒的Umf与p-0.3成比例，小粒径石英砂的Umf与p-0.21成比例，并根据实验值拟合出压力下最小流化速度公式为： Umf=μdp ρg｛［(34.15)2+0.05916×dp3 ρggμ2］12-34.15｝床层膨胀高度随气速的增大而不断增高，在相同UUmf下床层膨胀高度随压力的增大而增高，在大于0.7MPa时，压力对膨胀高度的影响减弱。

This paper gives a local near neighborhood Particle Swarm Optimization algorithm that can optimize the unfeasible particle's position.

设计了一种引入局部近邻机制并且能够优化不可行解的粒子群算法。

The conclusion is drawn through analyze and comparison between the solutions of zero and first order, second and first order that the particle drifts in the vertical direction of the magnetic field and its crosswise gradient in the approximation of first order. While the particle makes superimposed circle movement of uniform velocity in the approximation of second order.

通过分析比较1阶近似解与0阶近似解；2阶近似解与1阶近似解，得出由于1阶近似而引起粒子在与磁场方向以及磁场横向梯度方向垂直的方向发生漂移；由于2阶近似使得粒子在xy平面内做12W、3W、4W、5W、6W叠加的匀速圆周运动。

This density is consistent with the Classical density distribution,thereby it is obtained that a wave function of a charged particle in a uniform electric and magnetic field does not describe a single particle but a uniform ensembl

由此得出结论：均匀电场和磁场中带电粒子的定态波函数不描述单粒子而描述系综。

The effect of variation particle growth rate constants and the gas temperature on the density of the dust particles was investigated. The different forces acting on the nanoparticles and it can also be seen that an increase in nanoparticle size results in a higher negative charge on the nonoparticle's surface was investigated. The distribution of positive, neutral, and negative particle charge were computed.

本论文系统介绍了近年来迅速发展的流体模型，给出气体压力对粒子生长的影响，气体温度对尘粒密度的影响，分析了纳米粒子受力情况和粒子大小与充电量的关系，并且得出粒子浓度和电子温度随时间的变化，以及正离子负离子和电子的浓度在等离子体中的分布。

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。