根据各频率的信号的叠加进行信号重构。
地球物理信号通常表现为多个这类信号的叠加，为多维分形特征。
Geophysical data are the stack of these kinds of signals and thus present multi-fractal characteristics.
叠加提高了信号的信噪比，使研究人员能够更清楚地跟踪每一个独特的信号在月球内部传播的路径和行为。
Stackingimproved the signal-to-noise ratio and enabled the researchers to moreclearly track the path and behaviour of each unique signal as it passedthrough the lunar interior.
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