不断变化

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。

Our aim: Let customer satisfaction our goal: to become the industry leader in the company uphold the "integrity-based, customer first, quality survival, reputation and development" the principle of constant pursuit of technological innovation, attention to master the upper reaches of the core technology in the mobile storage tired a wealth of experience to ensure that changes in its market, product updates and services at the front of the same industry.

我们的宗旨：让客户满意我们的目标：成为行业领先者公司秉持"诚信为本，用户第一，以质量求生存，以信誉求发展"的方针，不断追求技术创新，注重掌握上游核心技术，在移动存储方面累了丰富的经验，保证其在变化的市场上，产品的更新和服务都走在同行业的前面。

The person is changing continuously ,some headway, and some countermarch.

人是不断在变化的，有的是前进，有的是后退。

In counterpoint to this rising saving rate, the investment rate flattened out at around 43% of GDP from 2004 onward.

与不断上升的储蓄率形成鲜明对比的是，投资占GDP的比重自2004年以来一直保持在43%上下没有什么变化。

Moreover, Shanghai is crowned as "the Exhibition of World Architecture".

随着改革开放的不断深入，上海城市发生了日新月异的变化。

The earth's crust is dynamic and ever changing.

地壳是动态的，而且不断地在发生变化。

It was rev ealed that:cuprite,malachite and tenorite are the three main kinds of copper-bea ring minerals which would be supersaturated when Cu concentration in the solutio n is high enough(higher than 0.0016 mol/L,0.0079 mol/L separately) under the stu dy conditions.Copper exists in the solution mainly as the species of CuCO3 ,Cu2+ and CuOH+.The corresponding content of CuCO3 would be decrea sed following the deposition of the copper-bearing minerals,nevertheless,Cu2 + and CuOH+ would be increased.

模拟结果表明，在土壤中常见的E h和pH及研究区的年平均温度条件下，溶液中铜离子的含量达到一定的浓度时，可以生成赤铜矿(当Cu≈00016 mol/L)、孔雀石及黑铜矿(当Cu≈0 0079mol/L)等次生矿物，溶液中Cu的存在形式也发生了变化，即CuCO3所占的比例不断减小，而Cu2+和CuO H+的含量则相继增高，且Cu2+的增幅大于CuOH+。

And there are people who advocate these options in the hope that it will deflate pressure to reduce emissions.

尽管我还不清楚气候变化对人类的威胁到底有多大，但我确信一点：至少存在后果不断恶化的可能。

Much attention has been paid to the attributes of creativity, outline, delightfulness as well as environment protection, which stand the important roll in competition.

随着市场竞争的日趋激烈，社会的消费观念不断发生变化，产品的功能已不再是消费者决定购买的最主要因素。

In the past several decades, the speed of the introduction of the innovation of the efficient risk management has been raised rapidly, due to the change of the market provider and demander which take the risk of the market.

在过去的几十年中，便利风险管理的创新的导入速度，因为承担风险的市场供给方provider和市场需求方的变化而不断提高。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。