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(dòng)信號普遍存在非平穩性，同時(shí)對于某臺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.
其次針對噪聲信號的非平穩性，研究基于小波尺度譜噪聲分量的時(shí)頻特征分析。
