nonstationarity的用法和樣例：
例句
用作名詞 (n.)
- Considering rotation machines like a motor, the vibration signals are of universal nonstationarity and the fault samples are usually very limited.
旋轉機械如電機振動信號普遍存在非平穩性，同時對於某台設備已有的故障樣本往往非常有限的。 - Secondly, to the nonstationarity of diesel engine noise, this paper focuses on the extraction of time frequency feature using wavelet scalogram.
其次針對雜訊信號的非平穩性，研究基於小波尺度譜雜訊分量的時頻特徵分析。
