查询词典 unstationary

At present,the analytic tools used for the power signals in microcomputer protection include FFT,Kalman filter and finitely shock response filter,etc.They are effective to analyze stationary signals but localizable for unstationary signals analysis.Especially it is difficult to identify nonlinear fault,e.g,the nonlinear high impedance short trouble is along-term unsolved problem of power system.

目前，用于微机保护中的电力信号分析工具有FFT、Kalman滤波器、有限冲激响应滤波器等，它们对于平稳信号的分析是高效的，但在分析非平稳信号中有其局限性；尤其对非线性故障识别困难，如探测高阻抗非线性短路故障便是电力系统一个长期没有很好解决的问题。

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。

The algorithm and application to unstationary signal analysis are distussed with wavelet transform in order to overcome defect of Fourier transform only applied to stationary signal analysis on frequency domain.

论文针对传统Fourier变换只能在频域上对稳定信号进行分析的不足，探讨了利用小波变换进行非平稳信号分析的算法和应用，并在两者之间做了比较。

The unstationary heterogeneous model, consisted of a set of partial differential equations, was obtained by mass and heat balances of both gas and solid phases in large scale reactors with a series of simplication supposition.

首先，以工业反应器为建模对象，在一系列基本假设的支撑下，通过反应器微元内两相的质量衡算和热量衡算，得到由偏微分方程组构成的、流向变换强制周期操作二氧化硫催化氧化反应器的非定态非均相模型。

Joint Time-Frequency Analysis is a new-style theory in Signal-Analysis, which combines the signals' characters in time domain with those in frequency domain. For reflecting the integral character, JTFT possesses good effect in analyzing unstationary or time-changing signals.

联合时频分析方法是一种新型的信号分析理论，它结合了信号在时间域与频率域的特性，反映了信号频率随时间变化的综合特性，在分析非稳定、时变信号方面具有很好的效果。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。