Line spectra provide significant information in ship-radiated noise. Extracting spectral lines from ship-radiated noise is a key technique in identification of underwater targets.

线谱是船舶辐射噪声中重要的特征信息，线谱提取是水中目标识别的关键技术。

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Otherwise, information extracting, information preprocessing technique, inquiry interface, and information filter technique based on naive bayes is put forward.

本文还讲述了信息提取技术、信息预处理技术、查询接口实现技术、基于朴素贝叶斯的信息过滤技术等关键技术。

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