查询词典 noise-power-ratio

The experimental results used in this study were obtained in the European SIROCCO project1, which aims at a reduction of wind turbine noise by designing new blades with low trailing edge noise emissions, the project focused on two wind Turbines: an 850 kW GAMESA turbine and a 2.3 MW GE turbine, with rotor diameters of 58 m and 94 m respectively.

实验性结果被使用在这项研究被获得了用欧洲人 SIROCCO project1，瞄准风涡轮噪声减少由设计新刀片以低后缘噪声放射，项目集中于二风涡轮：一个850 千瓦GAMESA 涡轮和一个2.3 兆瓦GE 涡轮，以58 m 和94 m 电动子直径各自。

Main innovation and study achievements are described as follows:(1) A set of friction noise testing system was set up on the pin-on tester. In the process of friction testing in which the TRIP steel with transformation characteristics is continuously sliding in unilateralism, variety rule of the friction noise intensity was studied.

本文的主要创新和研究成果体现在以下方面：(1)在销盘摩擦磨损试验机上建立了一套摩擦噪声测试系统，研究了具有相变特征的TRIP钢在单向连续滑动的摩擦试验过程中，摩擦噪声的强度的变化规律。

Through the spot measurement of the pump and downstream pipeline noise,and analyzing the spectrum analysis curve of sound pressure level and sound intensity level,this paper offers basis for the fundamental reason study of high vibration and noise,and puts forward t.

通过对泵及下游管线噪声进行现场测量，以及对各测点声压级谱分析曲线和声强级谱分析曲线的分析，为研究其振动和噪声高的根本原因、提出合适的改造方案提供依据。

ABSTRACT :Noise pollution from the sound source, the main route of transmission and the receiver three basic aspects of composition, therefore the control of noise pollution must be part of these three studies as a system.

摘 要：噪声污染由声源，传播途径和受主三个基本环节组成，因此噪声污染的控制必须把这三个环节作为一个系统进行研究。

This article had the soundproofing barrier to in Neijiang-Kunming line Weining section the land sector noise to carry on actual and carries on the analysis comparison to along the route other road sections noises in,obtained the Neijiang-Kunming line Weining section railroad noise to the grass sea nature protection area wild animal's influence conclusion.

本文对内昆线威宁段有隔声屏障的地段的噪声进行了实测并对沿线其余路段的噪声进行分析比较，得出内昆线威宁段铁路噪声对草海自然保护区野生动物的影响结论。

This excess noise spectral density is about one order of magnitude higher than the background 1/f noise.

这额外杂讯密度的量比较背景的1/f杂讯可大上十倍。

It is also less sensitive to the spectral noise for the noise levels up to 10%.

在杂讯程度小於10%的情况下，最佳化演算法对杂讯是不太具有敏感性的。

In the optical-fiber channel, amplified spontaneous emission noise in the optical amplifier is the major source of noise.

在远程光纤信道中，放大器自发辐射噪声是主要噪声源。

In order to provide a photo detector in which the generation of spontaneous noise is suppressed and external noise is effectively reduced, a p-type diffusion layer is provided on the obverse side of an n-type semiconductor substrate, a p-type low-resistance layer is provided on the obverse side of the p-type diffusion layer, a lead frame is provided on the reverse side of the n-type semiconductor substrate with an insulative resin film in between, and the p-type low-resistance layer is electrically connected to the lead frame.

为了提供能够抑制自发噪声的产生并有效地减少外部噪声的光检测器，在n型半导体衬底正面设置p型扩散层，在p型扩散层正面设置p型低电阻层，在n型半导体衬底的反面设置引线框架、中间夹有绝缘树脂薄膜，p型低电阻层电连接到引线框架。

Sharp squealing noise is a kind of high frequency noise generated from the contact between wheel and rail.

尖啸噪声是轮轨接触处发出的一种高频刺耳的噪声。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。