群速度

So promis'd hee, and Uriel to his charge Returnd on that bright beam, whose point now rais'd [ 590 ] Bore him slope downward to the Sun now fall'n Beneath th' Azores; whither the prime Orb, Incredible how swift, had thither rowl'd Diurnal, or this less volubil Earth By shorter flight to th' East, had left him there [ 595 ] Arraying with reflected Purple and Gold The Clouds that on his Western Throne attend: Now came still Eevning on, and Twilight gray Had in her sober Liverie all things clad; Silence accompanied, for Beast and Bird, [ 600 ] They to thir grassie Couch, these to thir Nests Were slunk, all but the wakeful Nightingale; She all night long her amorous descant sung; Silence was pleas'd: now glow'd the Firmament With living Saphirs: Hesperus that led [ 605 ] The starrie Host, rode brightest, till the Moon Rising in clouded Majestie, at length Apparent Queen unvaild her peerless light, And o're the dark her Silver Mantle threw.

他应允了；尤烈儿便乘光线回到自己的岗位，那光线已经把尖端转而向上，冲入苍穹，尤烈儿被斜带而下，到沉入亚速尔岛下面的太阳那儿去。不知是那颗主星以难以置信的速度每天向那儿滚转，还是较迟钝的大地另有到东方的捷径，他被留在那里，在西方宝座上伺候的云彩，被回光饰成紫金辉煌。这时夜幕悄悄降临，苍茫的夜色把万物包进深灰色的衣裳里。寂静伴随而来，群兽已归窝，百鸟已归巢，一切都已入睡，只有夜莺清醒着；她彻夜歌咏韵味无穷的恋歌。"寂静"异常欣喜。那时苍穹放出碧玉般鲜艳的萤光。领导各星群的金星，最为明亮，直到月儿在云彩簇拥的庄严中升起，终于脱去面纱，展现女王的丰姿，放出无比的光辉，在"黑暗"上面，披上她那银色的宽袍。

The results showed that when the proportion of the resistant subpopulation within the h-VRSA was low, te level of the toxic factor and its pathogenicity to animals had no difference from that of the standard strain. If proportion of the resistant subpopulation increased the level of coagulase and lecithinase changing from positive from negative and the ring of hemolysis disappeared. The speed of proliferation of the organisms in the animal slowed down and the LD50 increased.

结果 当试验菌株中耐药亚群的比例较少时，其毒力因子及动物致病性检测结果与金葡菌标准菌株无显著差异；随着试验菌株中耐药亚群的比例增加，表现为血浆凝固酶、卵磷脂酶由阳性转为阴性，血琼脂平板上溶血环消失，细菌在动物体内增殖速度减慢，对动物的半数致死量(LD50)增加。

Existing particle swarm algorithm and its variations converge slowly and get into local extremum easily. Due to this, based on the characteristics of current conceptual designing, an improved particle swarm optimizational model based on dynamic niche is proposed in this paper.

现有的微粒群算法及其变种都有着收敛速度慢、容易陷入局部极值问题，再针对目前创新概念设计的特点，本文提出一种改进的基于动态小生境的微粒群优化模型。

It is improved to solve the prematurely and stagnation problems of traditional Ant Colony Optimization in the paper. First, mean value method is used to update pheromone to avoid premature convergence which leads to non-globally optimal solution. Second, Pheromone is updated by Best Track to speed the rate of convergence which will help to avoid locally optimal solution.

本文针对基本蚁群算法比较容易陷入早熟和停滞，对现有蚁群算法的信息素更新规则进行了改进，一是采用平均值法更新信息素，避免算法过早收敛于非全局最优解；二是采用最佳路径法更新信息素，可加快收敛速度，并使算法跳出局部最优解。

The simulation results show that this algorithm has better global convergence ability and more rapid convergence,and it is superior to Genetic Algorithm,Particle Swarm Optimization algorithm and QPSO algorithm.

仿真实例表明，该算法具有良好的全局收敛性能和快捷的收敛速度，调度效果优于遗传算法、粒子群优化算法和量子粒子群优化算法。

Compared with IEKCA, GKPSOKCA needs less parameters to determine, can be easily implemented, and has stable convergence characteristic with good computational efficiency.

粒子群K均值聚类算法需要调整的参数少，易于实现，计算速度快，且具有稳定的收敛特征，能很好满足群控系统实时性的要求。

As for the reason, the phenomenon of industrial clusters comes into being owing to aseries of social and cultural factors that lies in the final products such as technologicalclassification, the possibility of product difference, the interconnection of technologicalinnovation, the taciturnity of knowledge, the dynamic changes of the competitiveenvironment of enterprise and the economy of development, the low transportation costof the final products, and the fashion and artistry.

究其原因，产业集群现象的出现是由于多方面因素的综合作用而造成的，其中包括产品存在着技术上的可分性、产品具有差异化机会、技术创新的网络性、知识的缄默性，以及企业竞争环境的动态多变和速度经济性、集群产品的低运输成本并具有时尚性和艺术性等一系列社会文化因素。

Premature convergence and weak local optimization are two key problems existing in the conventional genetic algorithm. To overcome the shortcomings, an improved genetic algorithm based on the particle swarm algorithm is proposed.

针对传统遗传算法中存在的易陷入局部最优解和后期收敛速度慢的问题，基于粒子群算法，对传统遗传算法作了改进，提出了一种基于粒子群算法的遗传算法。

By the method of dividing niches,niching particle swarm optimization has kept the diversity of species,overcome the drawback of basic PSO,such as being subject to falling into local optimization and having the poor convergence speed,and so improved the ability of seeking global optima.

小生境粒子群算法通过划分小生境的方法，保持了物种的多样性，克服了粒子群算法容易陷入局部解，后期收敛速度慢的缺点，提高了算法的全局寻优能力。

Methods 20 patients with complete left bundle branch block and 20 normal subjects were studied.

方法对20例完全性左束支传导阻滞患者和20例正常人解剖M型在心室波群区观察室间隔与左室后壁运动；运用频谱多普勒成像技术测量左、右心室射血前期时间（LVPET、RVPET），计算两者之差PETd；采用定量组织速度成像技术测量右室侧壁基底段和左室各壁基底段达收缩期峰值速度时限和达舒张早期峰值速度的时限。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。