The results may better reflect the non-stationarity of ground motion in time domain and are closer to reality than those by wave theory and stationary random vibration theory.
由于这种方法能较好地反映地面运动的时域非平稳性，所以得到的计算结果更真实。
Simulation results show that non-stationary noise can be identified in time domain and resolution improvement is obvious compared with that of conventional noise detection in frequency domain.
实验表明：非平稳噪声在时域中是可以识别的，与传统的噪声频域检测方法相比，分辨率有明显的改善。
Investigation characteristic of real world audio, combine stationary for short time-scale and non-stationary for longer time-scales, proposed a time frequency domain blind source separation algorithm.
研究了实际环境语音信号的特性，结合语音信号的短时平稳性和长时非平稳性，给出了一种时频域盲分离算法。
Both stationary and non-stationary signals are suitable to be analyzed by the system. The running state of generator set can be real-time observed in both time domain and domain.
系统可以分析平稳信号和非平稳信号，实现了实时地在时间域、频率域内了解机组运行状态的功能。
As one of the best tools to analyze the non-stationary signals, it shows a good picture in the joint time-frequency domain and makes us know about the change of frequency along with the time clearly.
这种分析方法提供了时间域与频率域的联合分布信息，清楚地为我们描述了信号频率随时间变化的关系。
The wavelet transform has a good performance of local analyzing in both time domain and frequency domain. It is fit for analyzing non-stationary signals, such as ultrasonic signal.
而小波具有“变焦距”特性，在时域和频域中具有良好的局部分析能力，适合于超声等非平稳信号处理。
In this paper, a practical conclusion has been arrived at that we can transform the nonstationary and growing network traffic to the domain of the stationary signal by the ARIMA modeling.
利用ARIMA模型法，在研究网络流量具有成长性、非平稳性的基础上得到了更为实用的结论。
In order to process the non-stationary vibration signals such as speed up or speed down signals effectively, the order tracking technique and Angle domain average technique were presented.
针对齿轮箱升降速过程中振动信号非平稳的特点，将阶次跟踪、角域平均和幅值、相位解调分析技术相结合，提出了基于幅值和相位解调分析的齿轮箱故障诊断方法。
In order to process the non-stationary vibration signals such as speed up or speed down signals effectively, the order tracking technique and Angle domain average technique were presented.
针对齿轮箱升降速过程中振动信号非平稳的特点，将阶次跟踪、角域平均和幅值、相位解调分析技术相结合，提出了基于幅值和相位解调分析的齿轮箱故障诊断方法。
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