可靠

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。

The present study initially put forward that the overestimation to underestimation of actual flow rates by the flow rates calculated using the hemispheric flow convergence method is due to the gradual change of isovelocity surface area in different zones of the flow convergence region, which was proven in our in vitro, animal and human studies.

7血流会聚法对二尖瓣狭窄瓣口面积、室间隔缺损分流量的确定也是一种较为准确、可靠及影响因素较少的方法。(8)本研究首次提出由于不同血流会聚区等速表面形态变化导致半球血流会聚方法计算流量从高估到低估实际流量的论点，并在离体、动物及人体研究证实。

The method is simple, credible and has high precision and rapid calculation convergency.

该方法迭代过程简单可靠、计算速度快、识别精度高，适用于任意形状和边界条件的复杂智能结构。

How to construct a reliable fetal biometric - gestational age conversion table?

如何构建可靠的胎儿生物计量孕周转换表

Experimental results prove that the control method of this converter is simple,reliable an...

实验结果表明，该变换器的控制方法简单、可靠和通用。

Experimental results prove that the control method of this converter is simple, reliable and general.

实验结果表明，该变换器的控制方法简单、可靠和通用。

Based on convex combination technique, reliable controllers and a switching law are designed to make systems be globally asymptotically stable not only when all actuators are operational, but also when some actuators faults occur. At last, the simulation results show the feasibility and validity of the designed method.

利用凸组合技术，设计可靠控制器和相应的切换策略，使得不仅当执行器正常时而且当一些执行器出现故障时仍保证闭环系统是全局渐近稳定的，最后通过仿真算例验证所设计方法的可行性、有效性。

On the basis of convex optimization theory,the design arithmetic method and its steps about optimal guaranteed cost reliable control are provided.

根据凸优化理论，给出了最优保性能可靠控制器的线性凸优化设计算法和设计步骤。

And the design of the optimal reliable guaranteed cost controller is formulated as a convex optimization problem, which can be solved by the existing convex optimization techniques .

在此基础上，通过建立和求解由一组线性矩阵不等式所表示的凸优化问题，得到最优可靠保性能控制律的设计方法。

The above-mentioned results are useful in design and application of the pneumatic conveying system.

上述研究结论为实际工程设计和应用提供了可靠的依据。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。