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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。

Jazz expert David Baker at Indiana University says cool jazz emphasizes the melody and is very relaxed.

贝克在印第安那大学说,冷静淡漠的爵士乐着重强调悦耳的音调,而且非常放松,贝克教授说,激动热烈的爵士乐所针对的是我们的心,而冷静淡漠的爵士乐所针对的却我们的思想。

Some key problems of line structured light sensor is given comprehensive studies theoretically and practically, which include the analysis of sensor's mathematic model; the improvement of the key parts of the sensor, the light source and imageforming system; the method of on-line measurement and the evaluate of BGA coplanarity. These studies are supported by corresponding satisfactory experiments. This dissertation covers the following aspects concerning the main work and creative research in the subject: 1. The operating theories and features of pattern measuring methods are systematically introduced.

本文成功地将线结构光传感器应用于BGA芯片管脚共面性的在线测试,并针对线结构光传感器测量的一些关键问题进行了深入细致的研究和探讨:建立了线结构光传感器的模型并对结构参数进行了详细的分析,针对传感器的关键环节—光源和成象系统的改进都提出了创新性的理论和方法,对管脚形状比较复杂的BGA芯片球栅阵列的在线测试方法和评定方法进行了理论研究和实验分析,并获得了满意的结果。

The main contents of this paper are asfollows: Programmed a software which is used in simulating the dynamic energyconsumption of buildings based on transferring function principle in the language ofvisual basic, at the same time compared with the traditional way of calculation ofenergy consumption in buildings to prove the correctitude of the software;Foundviable way of energy efficiency in buildings in the way of analyzing walls, windows,and many other aspect of structure of buildings, and using the software to analyzethe rate of the contribution of thermal quality to the energy consumption of buildings;Analyzed the rate of the contribution of the different weather to the energyconsumption of the existing dwelling in the way of calculating the energyconsumption in the whole year of the existing dwelling in two model cities choosefrom the region of north China and south China. Also is carrying on the contrast andviability assessments on the energy saving of the existing dwelling between northand southern region, getting the viability assessments and the conclusions inparticular data.

本文主要研究内容是:依据传递函数法原理应用Vb语言编写建筑物动态负荷仿真软件,并与传统负荷计算法进行比较,分析了程序的可靠性;从墙体,窗户及建筑结构的其它几个方面分析了建筑节能改造的一些可行性途径,并针对对建筑能耗影响较大的墙体与窗户就其热工性能的改变对能耗的影响应用程序进行了具体的分析;针对因地域性差异造成的气候差异对建筑节能措施效果的影响,就既有建筑的节能改造,分别选择华南华北地区的两个典型城市对其既有建筑节能改造前后的全年动态时时负荷进行计算,通过对比华南地区和华北地区的两个典型城市的既有建筑节能改造前后的能耗,及两城市节能改造后的节能效益,初投资回收期等方面,得出地域差异导致的气候差异对既有建筑节能改造的效果的影响的指导性结论及南北两地域既有建筑改造的量化结论和改造可行性的分析结论。

Because of inappropriate operation between oncoming straight and left-turn vehicles of signalized intersections of urban areas in Taiwan the department of traffic ever offered corrigible opinions involve in right of way, center of intersections adjudging hard and indirectly encouraged to accelerate left-turn vehicles. But all still lack quantification analysis. Therefore, this problem is worth studying.This study will aim at safe passage of oncoming straight and left-turn vehicles for at-grade signalized intersections. So, this study will be based on row's theory, theory of traffic conflicts, and take many factors into consideration, such as the width of the intersections, types of the intersections, center of the intersections, the size of the vehicles, the location of the vehicles, the radius of turn, paths of operation, the speed of the vehicles, the types of collisions, the angle of road, and also deduce formulas of coordinate of paths. The main method used in this research is the simulation of different situations. By the method, the analytic model of safe passage of oncoming straight and left-turn vehicles for at-grade signalized intersections will be established, and this study will also subsume critical speed of conflict and expected number of times of safe passage. Finally involved rules of safe passage will be proffered.

鉴於台湾都市地区路口对向直行左转车辆常遭受对向车辆不当驾驶行为干扰,因而道路交通主管机关曾针对路口对向直行左转相关道路交通法规可能产生之对向直行左转路权判断不易、路口中心处不易区分、间接鼓励路口转弯车加速左转等问题提出检讨之修正意见,唯整体考量仍缺少〝量化〞分析,系一值得研究之课题,因此,本研究将针对号志化平面路口对向直行左转车辆安全通行问题於法规层面上之特殊性,以交通冲突理论、路权理论为基础,并考量路口宽度、路口型式、路口中心处、车辆尺寸、转弯半径、运行轨迹、行驶速率、行车位置、最终碰撞型态、道路交角等因素,先行推导车辆行驶轨迹座标公式,再利用情境模拟分析法,进行号志化平面路口对向直行左转车辆安全通行分析,分析过程中则纳入冲突临界速率与安全通行期望次数理念,并根据路口对向左转车辆安全通行轨迹、速率集中分布范围之分析结果及相关理论,研拟号志化路口对向左转车辆安全通行轨迹、速率,及对向直行左转车辆路权判断原则,以供驾驶者路口直行左转安全通行之参考。

Reporter of dispatch of new wall bulletin learns from company of Shenzhen fast thunder, american film society is aimed at case of litigation of tort of fast thunder company, nolle prosequi actively with MPA eventually and end, company of immediately fast thunder already raised to be aimed at the countercharge bring a case to court of MPA respect.

新快报讯记者从深圳迅雷公司获悉,美国电影协会针对迅雷公司侵权诉讼案,终于以MPA主动撤诉而告终,随即迅雷公司则已提起了针对MPA方面的反诉讼。

Recently, limited company of technology of network of thunder of Shenzhen city fast (next weighing " fast thunder ") vice-president Luo Weimin to " daily of the first finance and economics " the reporter discloses, by American film society (the manages in the light of fast Thunder God litigation case of MPA) dominant, nolle prosequi actively with MPA respect and end, at the same time fast thunder already mentioned the countercharge bring a case to court that is aimed at MPA respect.

近日,深圳市迅雷网络技术有限公司副总裁罗为民向《第一财经日报》记者透露,由美国电影协会主导的针对迅雷公司的诉讼案,以MPA方面主动撤诉而告终,同时迅雷已提起针对MPA方面的反诉讼。

Complete, accurate and will not give rise to any claim against us including without limitation any claim in defamation

信息完整、准确,并且不会产生针对本行的任何权利主张(包括但不限于与隐私有关的或针对侵犯任何其他

Taking into account different network environments, this scheme uses default route in path setup procedure.

本文针对现有方案的不足,提出了三个方面的改进:(1)针对HAWAII路径更新算法的不足,设计了一种基于Default Route的路径更新算法DRB和它的增强算法,该算法在充分考虑各种网络环境的基础上,将default route用于HAWII的路径更新过程。

First, the article introduces main theories of interest rate transmission mechanism in western countries, and then studies the actuality of the effect of interest rate transmission mechanism in China demonstratively. After that, based on the essential analysis of the efficiency about present transmission mechanism, the article discusses the factors that restrict and influence interest rate transmission mechanism of monetary policy in China, from microeconomic factors and macroeconomic environment respectively. Finally, the article puts forth the reformation target of monetary policy interest rate transmission mechanism and the corresponding innovation proposals to enhance the effect of the interest rate transmission mechanism in China.

本文在借鉴和吸收前人研究成果的基础上,采用了规范性研究和实证研究相结合的方法,构建了关于货币政策利率传导机制有效性研究的合理的分析框架:文章首先介绍了西方货币政策利率传导机制理论,着重分析了这些理论发挥作用的途径和模式;其次,通过各种数据分析了我国货币政策利率传导机制的现状;接着针对我国利率传导机制表现出的独特现象分别从微观因素和宏观环境两个层面研究了弱化其有效性的各种因素;最后,针对上述因素提出了加强我国货币政策利率传导效率的政策建议。

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推荐网络例句

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了,请告诉我,我会帮助你摆脱困境,真的,请联系我啦!

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放,就是一个这样的例子。

Well, Jerry would rattle off all the details of that movie.

那么,杰瑞会急促背诵那部电影所有细节。