查询词典 noise

In this paper we use intraday data at Shanghai and Shenzhen stock exchange, through making economic model under simple hypothesis, to study the magnitude and the time-distribution characteristics of noise and the influence of trading frequency on noise.

内容提要本文用沪、深两市的分时交易数据，在简单的假设条件下利用计量经济模型定量研究了两个市场噪声的大小、时间分布特征以及交易频率对噪声的影响。

In the study of the stochastic chaos in simple pendulum, the random Melnikov process is derived and the mean-square criterion is used to determine the threshold amplitude of the bounded noise excitation for the onset of the chaos or random chaos in the system. For the coupled simple pendulum and harmonic oscillator, the Melnikov function is used to determine the condition for the onset of chaos in the case of Hamiltonian perturbations. In the case of non-Hamiltonian perturbation, the generalized random Melnikov process and mean-square criterion are used to determine the threshold amplitude of the bounded noise for the onset of random chaos.

在随机混沌研究中，应用随机Melnikov过程的均方准则研究了单摆在有界噪声激励下发生混沌或随机混沌时有界噪声激励的临界幅值；对于耦合的单摆-谐振子系统，先用Melnikov函数研究了在哈密顿扰动下发生混沌的必要条件；然后用推广的随机Melnikov过程方法研究了在非哈密顿扰动下发生随机混沌的必要条件；用最大Lyapunov指数及Poincaré截面方法结果与上述理论结果作了对比。

Therefore, the ultra-short beam current pulse of 2ns is able to be perfectly reconstructed. Through data processing, singular points, part of high-frequency noise and background noise are eliminated.

通过后期的信号处理，剔除了采样数据中的奇异点、部分高频噪声和本底噪声，消除了由于触发和被测信号不同步的客观条件造成的波形晃动。

For the singular spectrum analysis of time series, a method of constructing covariance matrix by using forth order cumulant is proposed. The method could restrain the Gaossian noise and symmetrical distributed noise mixed with chaotic signals.

对于时间序列的高阶奇异谱分析，提出了一种利用四阶累积量函数构造协方差矩阵的方法，该方法从理论上能有效地抑制叠加在混沌信号中的高斯噪声和对称分布噪声对重构结果的影响。

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。

As always, we finish this double test of portables with a small noise test.the question of noise is particularly delicate,Measured using a sonometer the sound effects of the MSI S271 and Alienware mALX were compared with their predecessors, the MSI S260 and Alienware Area-51m.we can put that on the account thatthe video card are more developed,more powerful, requires of course more power and then significant cooling .

一如既往，我们说完这双重考验笔记本电脑的一小部位的噪音问题，噪音是特别微妙，而采用sonometer的音效的微星s271和alienwaremalx人相比他们的前辈，微星的s260和alienware面积51m.we可以提出，对到视频卡，更加发达，更加强大，当然需要更多的权力，然后大幅降温。

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。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。