The Euler/ Kirchhoff method is adopted to calculate the far field noise of UH-1H rotor, and the calculated results are compared with the measured data. The effect of rotor blade tip shape on high speed rotor noise is investigated.

I will tell you that this symbol jumps from her pens tip with such speed that it is impossible to follow the method.

我会告诉你，这个符号从她的笔与这样的速度，这是不可能遵循的方法技巧跳跃。

The simulation results show that, the wind turbine operates with the best tip ratio speed under rated wind speed. The proposed control method has better control performance.

仿真结果表明，在额定风速以下风力机能够有效地保持最佳叶尖速比运行，所提出的分数阶PIλ控制方案具有更好的控制效果。

Therefore, the low tip tangential speed design of high bypass ratio is a trend.

因此低叶尖切线速度是将来大涵道比风扇的发展趋势。

Based on the model, the paper studies how to design wind turbine controller, enables the system operating in the vicinity of the maximum power point, when the wind speed below the rated wind speed. That is the tip speed ratio lies in the optimal value.

在建立的模型基础上，研究了当风速在额定风速以下时，如何设计控制器使得风力机运行在最大功率点附近，也就是说将叶尖速比控制在最佳值。

Combined with the simulation results and the vertical axis of the impeller tip speed ratio theory, that is required to improve the transmission speed increasing ratio, in order to meet the project of Hydropower for water flow energy with low water speed.

结合仿真结果以及垂直轴叶轮叶尖速比的理论推导，表明需提高变速箱增速比，才能符合水流发电装置低水速运行的要求。

A conventional fixed pitch vertical axis turbine cannot usually start rotating on its own and only is able to work efficiently at very high tip speed ratios. As a result, a self-start motor will be required.

而传统的定桨距垂直轴水轮机构通常不能够独立的启动旋转且只能在非常高的速率下有效地工作，因此自启动马达是必需的。

Introduction is given to the state of compressure ratio, maximal wheel tip speed, and maximal exhaust temperature, as well as mix-flow trend of turbine and the reliability of radial turbocharger.

介绍了径流增压器压气机压比、最高轮周速度、涡轮混流化、最高废气温度和可靠性等方面的发展现状。

Variable pitch vertical axis turbines have been proposed, which can markedly increase the power extraction efficiency at low tip speed through controlling the rotor blades pitch at all points of their rotation cycle.

目前已经提出了一种变螺距垂直轴水轮机，它可以通过控制转子在一个旋转周期上所有点的叶片间距来显著提高能量的提取效率。

The reliability of blade is directly related to the safe operation of the entire system, the rotational speed and tip speed ratio is a directly affects the performance of the wind turbine.

叶片的可靠性直接关系到整个系统的安全运行，叶片的转速、尖速比等直接影响风力发电机的性能。

Simulation results show that the fuzzy Control System had tracked of the best tip speed ratio when the wind speed is low, and get a stable output power when the wind speed is high.

仿真结果证明，模糊控制系统在低风速时很好的跟踪了最佳叶尖速比，在高风速时得到了稳定的输出功率。

The influence of solidity and aspect ratio on power coefficient of H-type vertical axis wind turbine, and the change of attack angle with tip speed ratio were analyzed.

采用多流管模型分析了H型垂直风力机展弦比和实度对其功率系数的影响，并对叶片旋转过程中攻角随尖速比的变化进行了分析。

And this paper analysis and research the whole system and establish mathematical model, result in which the changing power-load adjusting is the control way of the best Tip Speed Ratio.

本文分析研究并建立系统数学模型，根据系统模型确定最佳叶尖速比的控制采用可变功率负载调节方法。

To the grid connected wind turbine, the purpose of controlling it working at optimal tip speed ratio or about is to capture maximum wind energy.

对并网型风力机，控制其在额定风速下运行在最佳叶尖速比或其附近，主要是希望它能捕获到最大的风能。

The blade tip speed is limited to subsonic. The formulation is based on the FW-H equation.

本方法是基于对FW-H方程的准确求解，并限制螺旋桨叶尖相对速度为亚音速。

The control strategies under different wind speed have been analyzed and obtained the optimal tip speed ratio using the simplex algorithm.

分析了不同风速下的控制策略，应用单纯形加速法确定最优叶尖速比。

The YouTube video shows the man take a pot of several litres of boiling hot water on to his balcony and tip it over the side-with the liquid entirely evaporating before it touches the ground.

这段YouTube视频拍摄了一名男子将一锅几升的沸水从阳台倾倒出去，液体在接触到地面之前就完全蒸发成气体。

One of the tool tips is in contact with a projection in the notch, and the other one is in contact with the adjacent tool tip and the lateral side of the notch for the positioning.

有一个刀尖与缺口内的凸台相接触，另有一个与其相邻的刀尖与缺口侧面相接触，起到定位的作用。

The wheels she uses as front legs took some getting used to and at first the tiny lap dog would tip over to one side.

适应这两条新“长”出来的“滑轮腿”很花了“希望”一段时间，刚开始时，她总是不由自主地向一侧倾斜。

Different conservation temperatures will cause different growth rate of pile tip stress and pile side frictional resistance.

不同的养护温度造成了不同的桩端应力增长速度和桩侧摩阻力增长速度。

Results of analyses indicate that for the different base strata, the scales of tip resistance and side resistance are different, but the behaviors are same;

结果表明：桩底地层不同时，桩端阻力和桩侧阻力的比例不同，但承载性状仍属摩擦型桩；