查询词典 velocity

According to this understanding, this thesis tries to modify PSO algorithm in order to improve its quality of solutions. The main approches include: using uniform design to ensure the uniform distribution of initial particles in the design space; adding mutation operation to increase the diversity of particles; decreasing the maximum velocity limitation and the velocity inertia automatically to balance the local and the global search efforts; developing a new approach to treat the design variables exceeding the bounds; using extensive local searches to escape local minimum. The overall effect of these approaches can yield better results for most test problems.

有鉴於此，本文针对粒子群演化法之流程参考相关文献并稍作改变，使得粒子群演算法在结果的收敛上更具优势，本文的主要改进的方法包括：应用均匀设计的概念使得初始的粒子可以更均匀地分布在空间上；利用突变增加粒子之间的差异性与多样性；利用适当控制的最大速度限制及惯性权重控制，达到区域搜寻与全域搜寻的效果；应用新的边界处理机制处理设计变数超过上、下限的问题；利用区域强化搜寻针对粒子附近地区，再作进一步的搜索以得到更佳之结果；将各种方法综合后配合粒子群演算法使用，可以得到不错的结果。

The results provide a solution to the problems of how to control the impact velocity and how to make the impact velocity for each layer approximately equal and close to the inferior limit in the explosive welding of multilayer metal plates.

该文研究结果为控制层间撞去速度，使其达到基本一致，且接近焊接下限提供了解决方法。

By using K-ε twoequation model to modify turbulent flow, the simulation results could coincide better with the real filling processes. Combined flow path analytical program which was used to revise the ingate velocity, it increased the accuracy effectively, and raised the calculating velocity.

该软件首次采用非均匀网格剖分技术，更为逼真地反映了铸件的几何形状；耦合计算过程中，采用简化耦合算法，避免了繁复的迭代过程，缩短了迭代时间，且计算精度能满足工程要求；采用K-ε双方程紊流模型对紊流流动进行修正，模拟结果更加符合实际充型过程；联合流路解析程序修正内浇口入流速度，有效地提高了计算精度，加快了计算速度。

As to migration velocity analysis, it is suggested to start with a little higher initial velocity.

在偏移速度分析中，从稍大的速度开始分析会对速度分析更加有利。

So they are cleared up. The precision and velocity of initial alignment are decided by the precision and velocity of the value of the state variables.

而估计的精度和速度又由系统的可观测性所决定，故初始对准的速度和精度在很大程度上由系统的可观测性所决定。

The variations of the residual velocity with the initial velocity are obtained.

计算结果表明，在火炮初速范围内，长管体的剩余速度随撞击速度的增加近似为线性递增。

In special modes, the AccuRange 3000 reports instantaneous velocity or continuous velocity measurements.

在特殊模式下，AccuRange 3000报告瞬时测量或连续测量。

Through using the high-speed digital camera technology,research is carried out on dynamic combustion process of silicon delay explosive ,In addition,instantaneous velocity as well as average velocity of the combustion of silicon delay explosive is calculated.

采用高速摄像技术对硅系延期药的动态燃烧过程进行了研究，计算了延期药燃烧的瞬时速度和平均速度。

Analyze the distributing rule of velocity and velocity instantaneous, and also study the relationship between comers and the relationship between corners and position when the mechanism turning.

研究了该机构的卡当运动，分析了运动过程中的速度和速度瞬心的分布规律，并分析了卡当运动过程中各转角间及转角与顶点位置间的相互关系。

A measuring method of the velocity distribution at air calibrator exit of HWFA was introduced. The mean velocity and rate of flow can be obtained by curve fit and integral.

介绍了利用热线热膜风速计测量其空气校准器出口的速度分布，经过曲线拟合和积分，可以得出其平均速度和流量。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。