舰船辐射噪声信号的特征提取技术因其在水下装备中具有重要的应用价值，一直是国内外研究的热点和难点。
The technique of feature extraction of ship-radiated noise is of importance to underwater equipment, and it is a hotspot and difficult area in the national and international research.
最后结合辐射源信号检测和特征提取技术的研究，建立了复杂辐射源信号侦察处理技术系统模型。
Finally after the study on the emitter signal detection and feature extraction technology, the system model on complex emitter reconnaissance and processing technology was given.
大型电力变压器局部放电信号的特征提取是电气设备绝缘在线监测及故障诊断技术领域的前沿研究课题。
The feature extraction of partial discharge signal of transformer is the front research project in online monitoring and diagnosing high voltage insulation failure.
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