平稳的

Objective To study the power spectrum density of blood flow ultrasonic Doppler signal using wavelet analysis. Method Doppler signal of blood flow in human common carotid artery was studied with wavelet scalogram analysis, an affine smoothing Wigner Ville transform with a constant "Q" character. Result Wavelet scalogram of blood flow ultrasonic signal had a higher distinguishability than STFT spectrogram in the low frequency portion, but had poorer decussation terms than spectrogram.

对于平稳信号的处理工具仍然是Fourier变换，但是，在实际应用中的绝大多数信号是非平稳的，现在看来处理非平稳信号的主要工具将是小波变换，这主要是因为传统的Fourier变换分析信号时，时间和频率分辨率精度是固定不变的，而利用小波变换分析信号，在信号高频段时间分辨率精度也较高，在信号低频段频率分辨率精度较高，这很符合非平稳信号的特点。

It's proved that the long duration response is stable under stationary random excitation, when the mean equation of the temperature in all parts of heat conductor shows no difference with the heat conduction differential equation under classical stationary heat conduction condition.

研究表明，在平稳随机激励下，导热系统的长时间响应也是平稳的。

The methods of digital speech signal short-time processing with FPGA are presented in this paper.

0引言语音信号是非平稳过程，是时变的，但语音信号的特性随时间变换是缓慢的，在短时间内可以认为是局部平稳的。

An online mixture of experts is used to divide the HRRP data into several regions within which online Gaussian process classifier make predictions.

通过一种在线混合专家将HRRP数据在线地分割成若干个近似平稳的区域，在各个区域内使用平稳协方差函数的在线高斯过程分类器。

Calculating results show that variation of the propellant inlet pressure makes little impact on engine performance parameters, and the engine will transit to a new stable state. The parameter transition curves are smooth. When the engine thrust is adjusted in a small range within a short period, the parameter transition curves are also reposeful. But when the adjusting range becomes large, the parameter transition curves will fluctuate acutely. Thus, when large range adjusting is required, the time of adjusting should be lengthened or the adjusting should be divided into adequate steps.

计算结果表明，当发动机在某一个稳定工况工作时，发动机入口推进剂压强的变化对发动机性能参数的影响不大，发动机的参数都能比较平稳的过渡到一个新的稳定工况；当发动机在短时间内进行小范围的推力调节时，发动机参数的过渡过程的曲线也比较平稳，但是当在短时间内进行大范围推力调节时，参数的过渡过程的曲线振动比较剧烈，因此应当在进行大范围推力调节时，应当对调节时间进行适当延长，或者分级进行推力调节。

The data of the company management is essentially an unstationary time sequence. Regarded as a signal, the time sequence is decomposed into different frequency channels. Then wavelet decomposition and reconstruction are used to analyze and forecast the time sequence.

把公司管理上的数据看成一个非平稳的时间序列，利用小波函数将该时间序列分解到不同的频率通道上，然后将分解后的信号当作近似的平稳时间序列，用一些传统的统计方法进行预测。

Whose senses are quieted, just like horses well tamed by the charioteer, even the gods do envy such one, who has abandoned pride and is free from taints.

他诸根平静，如同被马车夫驯服的马，他已脱离我慢及诸烦恼，这平稳的人受到天神喜爱。（注：平稳的人是指不受世间的起落动摇之人。

Gull-like jaeger of northern seas.

飞行平稳的海鸥；乔治平稳的锤击。

It points out the exterior impaction of export departments on non-export departments and the impactions of primary products export and industrial products export and reveals the essential characteristic of China's economic operation through the empirical results, thus analyzing the impact of export trade on China's economic growth objectively.

为了避免谬误回归的产生，本文从非平稳的实际变量来考察，将名义变量合理地转化为实际变量，然后利用ADF单位根检验各变量的平稳性，对于非平稳的实际变量，利用协整理论来分析变量之间的长期关系。

The purpose of this study is to explore whether income smoothing affects the information content of earnings and the informativeness of past and current earnings about future earnings and cash flows.

中文摘要本文旨在探讨损益平稳化对盈余资讯内涵的影响，以及经平稳的损益是否影响投资人所获得之未来盈余、现金流量资讯多寡。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。