查询词典 global convergence

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。

Instead of being a natural process of essential convergence or compulsory colonization, the basic point of such cultural globalization stresses the global scale of cultural performance and the global nature of cultural clashes.

它的基点既不是自然进行的同质化，也不是强制推行的殖民化，而是强调文化表现领域的全球性，不同文化碰撞的全球性。

We discussed the convergence of MAP path, i.e. in the condition of global optimization, we researched into the convergence of hidden state sequence when observational state sequence is infinite.

讨论了MAP路径估计的收敛性，即在全局最优的条件下考察了当观测序列趋于无限时隐状态序列的收敛性问题。

The proposed algorithm integrating roulette wheel selection and one-point crossover can avoid the premature convergence more effectively and obtain more precise global optimal solutions with fast convergence speed, which makes the proposed algorithm suitable for the application of IEC.

该算法在采用赌轮选择和单点交叉的情况下，能够更有效的避免陷入局部搜索，以更高的精度快速收敛逼近全局最优解，从而能很好的满足IEC 的应用要求。

S. dollars and the decline of the Cold War provided the economic and political environment for European countries to integrate. For encouraging the economic incentives, major European countries' ruling parties ended the policies of Keynesian School and constructed a relative convergence for a European-wide laissez-faire economic policy. However, the most important impetus for the building of the European Union is the less strengthened role of the European region in the global competitiveness. For yielding part of their sovereignties, EU countries can enlarge their capacity, and survive much stronger in a global World.

当然，促成欧洲联盟形成原因甚多，不过欧洲在全球化竞争中居明显劣势地位仍是欧洲整合再出发的最主要堆动力，本文指出各国政策汇合因素只能算是新区域整合的必要条件，仍非充分条件，最大因素仍应是欧洲各国为因应全球化桃战形成的新区域整合，也即籍助於让渡部分主权，欧盟各国因而更能扩大本身的职能，於此，两岸似亦应从中获得相当放示才是。

The global trend of market economy leaded to convergence of private international law and appearance of global civil society.

市场经济的全球化趋势，也导致了国际私法的趋同化现象及全球市民社会的出现。

The convergence of the refined non-interior continuation method for NCPs is analyzed, the same global linear convergence as Chen-Xiu's is obtained.

得到了与Chen-Xiu同样的全局线性收敛，推广了Chen-Xiu的局部超线性收敛到局部二次收敛。

Experimental results show that this algorithm can effectively avoid the premature convergence problem and improve the ability of searching global optima and the convergence speed.

实验数据表明，该算法有效地避免了早熟现象，显著地提高了全局寻优能力和收敛速度。

Insection 4.3, semi-discrete and fully discrete Fourier spectral and pseudo-spectral schemes are constructed. The convergence and stability for the schemes are proved, and the error estimates are obtained.Chapter 5, consider the damped coupled generalized nonlinear wave equations. In section 5.2, by coupled a priori estimates and Galerkin method, prove the existence and uniqueness of the global smooth solution for the periodic initial value problem and obtain the existence of global attractors.

第四章，考虑一类具耗散的广义KdV方程组的周期初值问题，在第二节中证明了整体光滑解的存在性和唯一性，得到整体吸引子；在第三节中构造了半离散和全离散的Fourier谱格式和拟谱格式，在整体光滑解存在的条件下，证明了这些格式解的收敛性，并得到了误差估计。

Then a global separable nonlinear least-squares identification method which estimates the time delays and transfer function parameters separably is derived to reduce the possibility of convergence to a local minimum by using the global optimization theory.Furthermore,the GSNLS method is modified to a novel global separable nonl...

为降低收敛于局部最小的可能性，利用全局优化理论，推导了全局可分离的非线性最小二乘辨识方法；为消除强观测噪声所引起的参数估计的偏差，将GSNLS方法调整为一新颖的全局可分离的非线性多新息递推最小二乘辨识方法，仿真实验验证了算法的有效性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。