...特征频谱;阈值 中图分类号:TP206 文献标识码:A [gap=1149]eywords: Submarine noise monitoring; Acceleration sensor; Self-noise hydrophone; Characteristic frequency spectrum; Threshold ..
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The characteristic of linear and nonlinear responses between arc excited ultrasonic emission and excited frequency was realized by the received signal from the acoustic to the ultrasonic spectrum.
对受激电弧的声发射信号分析表明，从音频到超声频带，电弧声发射与激励频率之间存在着线性响应和非线性响应特征。
Under the room temperature and Nitrogen environment (eliminate the influence of water vapor absorption), we get the characteristic absorption spectrum of GaAs within the band of frequency.
在室温去除水份影响的氮气环境中，获得了低温生长的砷化镓在该波段的特征吸收谱。
The AR spectrum is smoothness and can give exact characteristic frequency.
时序建模作出的AR谱具有谱线平滑，特征频率定位准确的优点。
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