In STFT is window is of finite length, and we no longer have perfect frequency resolution.
快速傅立叶变换用到的窗宽度长度有限，因此不能获得完美的频率分辨率。
Size curves of cocoon filaments can be regarded as non-stationary time series with finite length varying at random.
茧丝纤度曲线的预测研究茧丝纤度曲线可视为是长度有限且随机变动的非平稳时间序列。
In this paper, we have simplified the sensor as a finite length cylinder, and calculated the energy loss and the temperature error.
本文将传感头简化成有限长圆柱，计算出在微波场中传感头的能量损耗和温度变化。
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