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Secondly,two basic methods of modeling wind wheel are analyzed:one is based on blade element theory;the other is based on blade aerodynamicist theory.

讨论和比较了两种风轮建模的基本方法：一种是基于叶素理论的建模，另一种是基于桨叶空气动力学的机理建模。

This dissertation is engaged in increasing the efficiency of the variable speed variable pitch WPGS. The technical and operation characteristics of the system are analyzed and the control schemes are researched in theory and simulation. And then, the emulation of WPGS in lab is also explored in order to verify the affectivity of the control scheme.

本文以提高风力机的风能捕获效率为目的，以变速变桨距风电机组为研究对象，分析了其技术特点和运行特性，对其变速控制策略进行了深入的理论研究和仿真分析，并对其实验验证手段进行了探索。

The invention comprises a main body of the reactor, the dynamic heat pipe, fins, a turbine, a motor, a transmission mechanism and a cold air jacket; the segment of the dynamic heat pipe in the main body of the reactor is a heat absorbing section; the segment of the dynamic heat pipe outside the main body of the reactor is a heat release section; the main technology characteristics are that the heat absorbing section of the dynamic heat pipe is connected with a central stirring shaft; and the heat absorbing section is used as a mixing impeller blade.

本发明包括反应器主体、动态热管、肋片、涡轮、电机及传动机构、冷风夹套，动态热管在反应器主体内的一段为吸热段，在反应器主体外的一段为放热段，其主要技术特征在于动态热管的吸热段与中心搅拌轴连接，吸热段作为搅拌桨叶。

In an earlier paper [2], we suggested the Mathematical model of helicopter rotor airfoil.

在[2]里，我们提出了直升机旋翼桨叶的数学模型。

This paper is based on a data collecting project of moving and static test-bed about helicopter airscrew, the total oral distance system is the subsystem of the project, and the paper reserched and developed our countrys most advanced moving and static test-bed about helicopter airscrew.

本文以"直十旋翼动平衡台控制采集王程"的总桨距调节系统为背景，研制开发我国最先进的直升机动平衡试验台。

Generally,C p curve can be regarded as a nonlinear function of pitch angle and tip speed.

通常情况下，功率曲线与桨距角和叶尖速比有关，可以看成是它们的非线性函数，一般由气动性能计算得到。

According to reports, the former Soviet Union-an -24 Antonov Design Bureau developed, the short-range twin turboprop aircraft. 1958 design, in September 1963 to enter the route to use.

据报道，安-24是前苏联安东诺夫设计局研制的中、短程双发涡轮螺桨运输机。1958年开始设计，1963年9月进入航线使用。

The first thing to see, looking away over the water, was a kind of dull line -- that was the woods on t'other side; you couldn't make nothing else out; then a pale place in the sky; then more paleness spreading around; then the river softened up away off, and warn't black any more, but gray; you could see little dark spots drifting along ever so far away -- trading scows, and such things; and long black streaks -- rafts; sometimes you could hear a sweep screaking; or jumbled up voices, it was so still, and sounds come so far; and by and by you could see a streak on the water which you know by the look of the streak that there's a snag there in a swift current which breaks on it and makes that streak look that way; and you see the mist curl up off of the water, and the east reddens up, and the river, and you make out a log-cabin in the edge of the woods, away on the bank on t'other side of the river, being a woodyard, likely, and piled by them cheats so you can throw a dog through it anywheres; then the nice breeze springs up, and comes fanning you from over there, so cool and fresh and sweet to smell on account of the woods and the flowers; but sometimes not that way, because they've left dead fish laying around, gars and such, and they do get pretty rank; and next you've got the full day, and everything smiling in the sun, and the song-birds just going it!

往 水面上望去，首先看到的是灰蒙蒙的一条线——那是河对岸的树林子——别的便什么也看不清——接着是天空中有一点儿鱼肚白；然后鱼肚白多了些，逐渐朝四周散开去；接下来，远处河水的颜色淡了些，不是那么黑了，而是灰灰的了。更远处，可以看到小小的黑点子在漂过来——那是些载货的驳船之类。还有黑黑的一长条——那是木筏子。有时能听到长桨吱吱地响，或者一些杂音。四周这么寂静，声音又来自很远的远方。过了一会儿，你看到一道水纹。凭了水纹的模样，你知道那里有一块礁石，急流朝着它冲过去，流水飞溅，成了这个模样。你看到，雾气袅袅上升，离开水面，东方红了起来，河面红了起来。你可以看到对岸河边树林子边上一处原木搭成的小屋，那可能是一个木材场，在那里堆着的一堆堆木材，中间却是空的，容得狗钻来钻去，为了能叫人家上当①。然后微风轻拂，从河上一阵阵吹来，那么凉凉的，那么清新，闻起来那么甜美，这是全凭了那些树林子和那些鲜花的缘故。可有时候也并非全是如此美妙。

As for the captain, he had carried his over his shoulder by a bandoleer, and, like a wise man, lock uppermost.

当他和雷卓斯这两个未曾消耗过体力的汉子在摇桨时，我在掌着舵。

Suitable numbers of zinc anodes shall be fitted on the hull below the waterline surface, areas around the propeller, on the rudder, sea chest, bilge keel and so on.

本船在水线下的船体外表面、桨、舵、及海底阀箱及舭龙骨等处设置适当数量的锌阳极保护，使用寿命为3年。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。