沙湾县无霜期163~179d4月中旬~10月上旬,气温≥10℃的活动积温35783℃~36071℃,≥15℃有效积温10646日度,日照2800~2870h/年,降水量140~200mm/年,蒸发量大,气候干燥,光照充足,昼夜温差大,热量丰富,
Frost-free period of Shawan Co
We propose and experimentally demonstrate a scheme of high-Q microwave photonic filter(MPF)using the techniques of self-phase modulation(SPM)spectrum broadening