本文证明了时间域内的平稳相关序列经离散傅里叶变换之后，听得到的是频域内的正交随机序列。
This paper proved that a frequency stochastic sequence obtained from a stationarily correlated time series by using discrete Fourier transform is orthogonal.
由于基于循环平稳的阵列处理方法利用了不同信号的循环频率不同这一时域特征，将多个信号在循环频率域进行分离。
Since the performance of cyclostationarity-based array processing methods suffers from severe degradation if there is a small mismatch in the cycle frequency of the signals of interest.
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.
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。
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.
针对基于四叉树分割的准平稳区域划分方法精度不高的问题，给出了一种基于分水岭分割的准平稳子域划分方法。
Secondly, the technique of adaptive clutter estimation and suppression based on quasi-stationary sub-image partition is discussed and its computer simulations are completed.
针对基于四叉树分割的准平稳区域划分方法精度不高的问题，给出了一种基于分水岭分割的准平稳子域划分方法。
Secondly, the technique of adaptive clutter estimation and suppression based on quasi-stationary sub-image partition is discussed and its computer simulations are completed.
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