聚集

Many residents converged outside of the community center to protest the meeting.

许多的居民在社区活动中心的外面聚集来抗议这次会议。

PSO is a population-based optimization algorithm, which mimics the social behavior of animals in a flock. It makes use of individual and group memory to update each particle position allowing global and local search optimization. The objective function considered was the total weight of the structure subjected to stresses, displacements and forces constraints. The effects of the parameters were investigated as well and such combination of tuning parameters promote a better global search behavior avoiding premature convergence while rapidly converging to the optimal solution. Results showed the effectiveness of the proposed method by comparing with ANSYS Design Optimization Tool (zero-order method). The PSO with the tuning parameters makes it an ideal method for offshore wind turbines foundations optimization tasks.(2) A reliability analysis method for pile foundation bearing axial loads based PSOThe performance function of pile foundation's axially bearing capacity sometimes is nonlinear and complex, on the basis of geometric meaning of structural reliability index, an optimum model with PSO for structural reliability analysis under arbitrary random variables was established, The PSO algorithm is very efficient to solve global optimization problemsIts use in structural reliability field presents not only the advantage of its facility of implementation, but also the possibility to obtain the design point and the failure probability with a good accuracy. In addition, PSO is a zero order algorithm, for no derivative is necessary for its implementation.

本文的研究针对桩式海上风机基础结构的特点，在国内外有关研究成果的基础上对海上风机基础结构优化设计理论和可靠度方法一些相关问题进行了较为深入的研究，具体做了以下几个方面的工作：(1)基于粒子群优化的桩式海上风机基础确定性优化设计方法桩式海上风机基础的优化设计是一个复杂的、非线性约束的优化问题，针对传统的基于梯度信息的优化方法在处理非线性问题中易陷入局部最优解的问题，本文将一种耦合惩罚函数的PSO算法引入到海上风机基础结构概念设计中，PSO算法是从群体动物聚集觅食这一活动中受到启发而发展的，该算法利用个体和群体的信息共享不断改进自身的位置从而进行局部和全局最优搜索，本文中以桩和三脚架连接段直径及壁厚为设计变量，以基础总重量作为优化的目标函数，在给定的约束条件下建立了三脚架基础优化数学模型，另外本文还研究了PSO参数变化对结果的影响，协调的参数组合可以避免陷入早熟收敛而能够快速的获得全局的最优解，通过与ANSYS优化模块的计算结果比较验证了该方法的有效性，本方法为海上风机基础的确定性设计提供了一条有效的途径。

Shippo Shippo Guzhen town is relying on large-scale development of ghettos, has now established an aggregation function (residential, commercial and services), advanced facilities, cultural tolerance and international convergence of living symbiotic community space.

七宝七宝古镇是依靠大规模发展的贫民区，目前已经成立了一个聚集功能，先进的设施，文化宽容和国际趋同的共生社会生活空间。

City, is essentially the result of element convergency.

城市，本质上是要素聚集的结果。

A convex lens is used to concentrate rays of light.

凸透镜用于聚集光线。不适合

A convex lens can be used to concentrate the sun's ray and thus burn a hole in a piece of paper.

凸透镜可以用来聚集太阳光，将一张纸片烧穿一个洞。

The urbanization is a process of quantitative and qualitative changes of population, industries and agents of production, a procedure of population, economy, environment and resources' development coordinately.

城镇化是人口、产业和生产要素向城镇聚集的量变和质变过程，以及在此基础的人口、经济、环境、资源的协调发展过程。

About 200 police strung up tape to cordon off the roughly 500 demonstrators who waved signs and chanted near the entrance to the Beijing Zoo.

约有500名示威群众参加了此次游行，示威者挥舞着自制的标志，并聚集在北京动物园门口，高声抗议，许多人手举纸制的动物模型，上面写有"停止杀害动物"的字样。

An economic system in which the means of production and distribution are privately or corporately owned and development is proportionate to the accumulation and reinvestment of profits gained in a free market.

资本主义一种经济制度，在该制度中，生产资料和分配为私人或企业所有，生产的发展与从自由市场中所获利润的聚集和再投入成比例

Artists are gathering and chat in front of TPE6453 for the NSW Cortez event.

下午开始，设计师们就开始在TPE6453开始聚集。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。