查询词典 weight of wind

In addition,discussion is undertaken for the 60 metre width double-layer barrel vault about the structural steel weight and cot affected in different grid size、rise/width ratio and different loads.It also includes the effect of wind loads on those of 100 metre width structure.The application in the roof of coal storage of barrel va

以60m跨度的双层圆柱面网壳结构为对象，研究了不同网格尺寸、不同矢跨比、不同荷载对结构的用钢量、造价等结果的影响；以及不同风荷载对100m跨度网壳计算结果的影响；比较分析了三心圆柱面网壳与圆柱面网壳结构在电厂干煤棚中的应用。

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。

While the installation intends to record rain in the tangible form and trace all the possible factors which may influence the result of the performance such as the power and direction of the wind and the weight of the rain drops, etc.

地球外部作用于此时此地的因素，日出日落时间，太阳系的行星运动，银河系的变化，总星系中的平均质量密度，宇宙的场强、宇宙常数、哈勃常数的测定，膨胀系数和年龄，宇宙的中心与半径、红移等，把这些外界影响记录做出照片作为作品的一部分。

It has the same style with LTHS100E, however, its functions were improved based on the old style; at present, LTHS100B applies imported wind pump assembly which has twice theme ---absorb and blow (increase parts on positive pressure air, strengthen the pressure that can deliver the unmelted flux directly into little hopper); the height of material absorbing and delivering can reach as high as 5 meters, and its level distance is around 12 meters, and the capacity of flux depends is 80KG; the suspended function also can be tailored according to customers' requirements; the weight of 100B is 130KG, its outer dimension is 450*800*1100mm. It has the advantages of small-volume, light-weight, beautiful-outer-appearance, unnecessary of air-compression, and can be ground-mounted or suspended; it is also easy to be operated, with switching on button, it can be operated. Furthermore, it is controlled by infrared ray. It has alarming lights.

该机与LTHS100E机形相同，但其主要特点：在LTHS100E的基础上精心整改了其功能，现LTHS100B是采用进口风泵总成为基础，吸、吹二次全部为主题（在正压气上增加了部件，增强了压力把吸收回来没有融化的焊剂直接推送到前方机头的小料斗内，）焊剂的吸、送料其高度不得超过5米，水平距离在12米左右，焊剂容量为80KG，可悬挂也可根据用户需要为用户量身订制，自重为120KG，外型尺寸为：450*800*1100mm，本机具有体积小，重量轻，外型美观，不需要具备压缩空气，可落地、可悬挂灵活，其操作简便为一线通即可，红外线控制，上方有警示灯显示，当焊剂不足时就会报警。

But the size and weight of large scale wind turbines become a problem because of the limit of traditional technology.

但是，受传统风机技术的限制，大功率发电机的尺寸和重量给陆上运输和安装都带来了很大的困难。

Class 1: Hang gliders having a rigid primary structure with pilot weight-shift as the sole method of control, and which are able to demonstrate consistent ability to safely take-off and land in nil-wind conditions.

第1级：滑翔翼有硬翼的基础结构，利用飞行员重量的移动( weight-shift )，作为唯一的控制方法，且能够展现一致性的能力，安全的在无风的条件下起飞及降落。

The influence of parameters such as high order mode shapes,horizontal and vertical power spectrum density,basic wind pressure, span and weight of the roof,damping ratio,terrain categories and support restraints, which are usually critical to the wind-induced vibration responses,are discussed.

尽管这些大跨屋盖结构的形式不尽相同，但它们都具有一些共同特点，即质量轻、柔度大、固有频率低、阻尼小等特点，它们都属于风敏感结构，因而风荷载就成为设计这些屋盖结构的主要控制荷载之一。

Furthermore,the influence of parameters such as the horizontal power spectrum density, basic wind pressure,span and weight of the roof,damping ratio,terrain categories and support restraints,which are usually critical to the wind vibration factor,are also discussed.

本文基于随机振动理论利用有限元程序ANSYS对大跨度实腹式钢梁在频域内进行了风振分析，讨论了高阶振型、脉动风速谱、基本风压、屋盖重量、地貌种别、阻尼比和支座约束等相关参数对屋盖结构风振响应和风振系数的影响。

However, upon Second Thoughts, I took it away, and wrapping all this in a Piece of Canvas, I began to think of making another Raft, but while I was preparing this, I found the Sky over-cast, and the Wind began to rise, and in a Quarter of an Hour it blew a fresh Gale from the Shore; it presently occur'd to me, that it was in vain to pretend to make a Raft with the Wind off Shore, and that it was my Business to be gone before the Tide of Flood began, otherwise I might not be able to reach the Shore at all: Accordingly I let my self down into the Water, and swam cross the Channel, which lay between the Ship and the Sands, and even that with Difficulty enough, partly with the Weight of the Things I had about me, and partly the Roughness of the Water, for the Wind rose very hastily, and before it was quite high Water, it blew a Storm.

大风整整刮了一夜。第二天早晨，我向外一望，那只船已无影无踪！这使我感到有点意外，但回头一想，我又觉得坦然了。我没有浪费时间，也没有偷懒，把船上一切有用的东西都搬了下来，即使再多留一点时间，船上也已没有多少有用的东西好拿了。

However, upon Second Thoughts, I took it away, and wrapping all this in a Piece of Canvas, I began to think of making another Raft, but while I was preparing this, I found the Sky over-cast, and the Wind began to rise, and in a Quarter of an Hour it blew a fresh Gale from the Shore; it presently occur'd to me, that it was in vain to pretend to make a Raft with the Wind off Shore, and that it was my Business to be gone before the Tide of Flood began, otherwise I might not be able to reach the Shore at all: Accordingly I let my self down into the Water, and swam cross the Channel, which lay between the Ship and the Sands, and even that with Difficulty enough, partly with the Weight of the Things I had about me, and partly the Roughness of the Water, for the Wind rose very hastily, and before it was quite high Water, it blew a Storm.

可是，再一想，我还是把钱拿走了。我一边把钱用一块帆布包好，一边考虑再做一只木排，正当我在做木排时，发现天空乌云密布，风也刮得紧起来。不到一刻钟，变成一股狂风从岸上刮来。我马上意识到，风从岸上刮来，做木排就毫无用处了，还不如乘潮水还未上涨，赶快离开，要不可能根本回不到岸上去了。于是我立刻跳下水，游过船和沙滩之间那片狭长的水湾。这一次，由于带的东西太重，再加上风势越刮越强劲，我游得很吃力。当潮水上涨不久后，海面上已刮起了风暴了。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。