小波变换作为频率和时间的二元函数，使之可以很方便地在频率和时间域中同时进行地震波能量的吸收衰减补偿。
Wavelet transform involves the two-variate function of frequency and time, which makes it convenient to simultaneously compensate for attenuation of seismic energy in frequency and time domains.
提出了利用小波来去除雷达平面位置图像(PPI)的散点噪声，然后利用形态学原理构造目标结构元来滤除斑点噪声和杂波。
In this paper, wavelet is used to erase speckle noise in radar PPI, and the principle of morphology is used for building structure element to filter off the speckle noise and clutter.
小波理论为有限元方法提供了许多不同的基函数和多尺度分析方法，需要根据具体分析问题进行选择。
Wavelet theory provides various basis functions and multi-resolution methods for finite element method, which will be selected in solving different problems.
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