As the two cases give identical results we believe that superposition holds for electron waves also.
由于上述两种情况给出完全同样的结果，我们相信叠加原理对于电子波也能适用。
2
In Kirchhoff migration, this is done by using the Kirchhoff integral representation of a field at a given point as a (weighted) superposition of waves propagating from adjacent points and times.
The periodic mean superposition method can predict the result through decomposing the hydrological time series into several periodic waves, extrapolating the periodic waves, and linear superposition.