Situation and Counter-measures for iron mine of Hebei after China s acceding to wto; geochemical characters of band iron formations from Xingshan iron deposit in Qian'an area, hebei province: implication for their origin 中国加入WTO后河北省铁矿面临的形势及对策河北迁安杏山铁矿床地球化学特征及其对成矿物质来源的指示
It is found that various defects dramatically impact the energy band structure and electrical conductivity. The physical origin is that the defect destroys the symmetry of the geometric structure. 研究发现,各种缺陷效应对其能带结构和导电性能均产生重大的影响,其原因在于缺陷的存在破坏了石墨烯纳米带几何结构的对称性。