For the piezoelectric crystal, not only a mechanical source distribution at the surface, but an electrical source distribution also can excite the elastic wave fields.
对于压电晶体，不仅表面力源，而且表面电源分布也能激发弹性波场。
In this paper, the Carrington longitude distribution of source location for 59 solar proton events with definite location on the solar surface during 1997-2003 is studied.
分析了1997-2003年期间的59个太阳质子事件，太阳质子事件源区的卡林顿经度带。
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