Based on the tangent function transformation, a modified global base expansion method (MGBEM) is proposed.

基于正切函数变换，本文提出了改进型全域基展开法(MGBEM)。

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The results prove that we can get a very effective outcome by the method of wavelet transformation if the adaptive wavelet base and threshold value are chosen.

试验结果表明，在选择了适当的小波基函数和阈值的情况下，采用小波变换的消噪方法对舰船辐射噪声信号进行消噪处理，可以取得良好的效果。

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This paper also makes a thorough research into data transformation techniques based on XML and integration between XML and relation Database, give a method of data input and export base on XML.

本文还研究了XML与关系数据库的集成和基于XML的数据导入导出相关技术，提出了数据的XML导入导出实现方法。

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