大的原子群和分子群的有序排列是极不可能的。
Ordered arrangements of large groups of atoms and molecules are highly improbable.
后来，他发现了一个太阳黑子群，它存在时间很长，从太阳的西边消失，又在东边出现，最后又回到原来的位置。
Afterwards he found a sunspot group which lived long enough to disappear from view on the western limb of the sun, to reappear on its eastern limb, and finally to regain its old position.
本文对闭群和真子群进行了分类。
In this paper, closed groups and proper subgroup are classified.
有像维吾尔族多兰和艾诺尔这样的子群体。
第二，一个由大量子群构成的多样化人口；
second, a diverse population with a large number of subgroups;
论证了粒子群优化算法在边坡工程中的实用性。
It demonstrates the practicability of particle swarm optimization method in slope engineering.
粒子群算法是一类基于群智能的随机优化算法。
Particle swarm algorithm was an optimized algorithm based on swarm intelligence.
观察到差别可能不代表普通人群里子群中个体成员的特征。
The observed differences are not not likely to be characteristic of individual members of those subgroups in the general population.
现在，我们不讨论单个的粒子，我们讨论粒子群。
Now, instead of talking about individual particles, we talk about ensembles of particles.
在这里，我将展示如何粒子群可用于最小化的功能。
Here, I'm going to show how PSO can be used to minimize functions.
最后在第六章中，我们讨论了非幂子群个数对群的影响。
In the last chapter, we discuss the affection of the number of non - power subgroups.
研究限制包括子群分析的本质和缺乏其他临床族群的普遍性。
Study limitations include those inherent in subgroup analysis, and lack of generalizability to other clinical populations.
粒子群优化(PSO)算法是基于群体智能理论的优化算法。
Particle swarm Optimization (PSO) algorithm is based on swarm intelligence theory.
每个子群精确的包含一个幂等元，也就是这个子群的单位元。
Each subgroup contains exactly one idempotent, namely the identity element of the subgroup.
求解机组组合问题的嵌入贪婪搜索机制的改进粒子群优化算法。
An improved particle swarm optimization algorithm embedded with greedy search for solution of unit commitment.
量子群是已知经典群的变形，所有经典群都无法将其作为对称群。
A quantum group is a deformation of a given classical group, and is such that no classical space can have it as a symmetry group.
粒子群优化(PSO)算法对于多峰搜索问题一直存在早熟收敛问题。
Particle Swarm Optimization (PSO) algorithm has existed premature convergence for multimodal search problems.
粒子群算法操作简便、容易实现且全局搜索功能较强，适用于非线性参数估计。
Considering that the particle swarm optimization (PSO) algorithm is quite simple and easy to implement, it was used to estimate the nonlinear model parameters in this paper.
纳米粒子是粒径为纳米级的粒子，由数目极少的原子或分子组成的原子群或分子群。
Nanoparticles are particles or groups of atoms or molecules nanometers in size.
介绍基本粒子群优化算法的原理、特点，并在此基础上提出了一种改进的粒子群算法。
This paper introduces the principles and characteristics of Particle Swarm Optimization algorithm, and puts forward an improved particle swarm optimization algorithm.
利用粒子群的优化算法，建立侵彻子母弹最佳抛撒高度的求解模型，并进行了仿真计算。
By using Particle Swarm Optimization (PSO), a model was built up for calculating the optimum dispersion height of intrusive submunition dispenser, and mathematical simulation was carried out.
「麻烦在于，以前用来做这些的软体通常会把人群当作流体中的分子群。」维达瑟先生说。
The trouble is that the software that is used to do this generally treats people like particles in a fluid, says Mr Wittasek.
现在，分类学家认为，既然已经发现鸟类是恐龙的后代，那么它们应当被划分为仅仅是恐龙的一个子群。
Now, taxonomists argue that since birds are descended from dinosaurs they should be classified merely as a subgroup of the Dinosauria.
不像Bre-X诈骗案，REE在怀俄明的地里确实有稀土，但却是很分散和冷门的子群元素。
Unlike the Bre-X scam, the company's Wyoming land does indeed have rare earths, but they are in small concentrations and are mostly the less-desirable sub-group of the elements.
这与粒子群采用单一的进化策略有关，因为过于单一的进化策略使粒子群整体上有一种趋同性。
This has something to do with its single evolution strategy because too single evolution strategy makes the swarm homoplasy.
我们偶尔还可以看到一些在附近闲逛的狮子群，但它们的数量却减少了，而象群是再也看不到了。
Lions still occasionally prowl nearby, but their Numbers are dropping. There are no elephants any more.
我们偶尔还可以看到一些在附近闲逛的狮子群，但它们的数量却减少了，而象群是再也看不到了。
Lions still occasionally prowl nearby, but their Numbers are dropping. There are no elephants any more.
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