Perovskite solar cell has emerged as a promising candidate in flexible electronics due to its high mechanical flexibilit......

Due to rapid urbanization and industrialization,many soils for crop production are contaminated by cadmium(Cd),a heavy m......

通过对运输问题最优性检验的位势法分析,提出了"运输位势"的概念,对其经济意义进行了研究,并阐述了运输问题最优性检验位势法的实......