The spectra analysis showed that porous silicon is the material with nano crystal structure, and photoluminescence of PS can be explained by the model of quantum restriction effect.
对不同实验条件下所得到的多孔硅的拉曼光谱进行了分析，确认了多孔硅是具有纳米晶结构特征的材料，肯定了量子限制效应在多孔硅光致发光中的作用。
Strict restriction shall be imposed on turning farm land into land for construction, quantum of land for construction shall be controlled and special protection provided for cultivated land.
严格限制农用地转为建设用地，控制建设用地总量，对耕地实行特殊保护。
Strict restriction shall be imposed on turning farm land into land for construction, quantum of land for construction shall be controlled and special protection provided for cultivated land.
严格限制农用地转为建设用地，控制建设用地总量，对耕地实行特殊保护。
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