广电网络业务发展的分析

以促进广电网络发展为纲,分析广电主要的3项增值业务:付费频道,高清互动,宽带业务。从实际出发,分析现状并为其正确定位,对其发展方向及业务增长方式题出建议,指出广电未来以电视业务宽带业务为主线的盈利格局。     

建筑供水管道材料对水化学性质、微生物群落和条件致病菌的交互影响机制研究进展

饮用水安全与公众健康息息相关，而供水管道材料的选择会影响饮用水化学性质、微生物生长，甚至是致病菌定殖。近年来，包含了原核病原体(如：嗜肺军团菌、非结核分枝杆菌)和真核病原体(如：棘阿米巴)在内的一类新型饮用水条件致病微生物引发了公众健康安全担忧，通过管材优选控制条件致病菌及其他微生物生长，具有研究价值和应用潜力。文章综述了建筑供水管网金属管材和塑料管材在不同环境条件下(如消毒剂、停滞时间、温度)对水化学性质的影响，分析了不同管材影响下微生物载量和群落结构组成的差异，剖析了管材对条件致病菌定殖的直接影响，以及在环境因子交互作用下的间接效用，提出了深化认识供水系统中真核微生物群落结构多样性及新兴管材的微生物安全风险的研究需求。     

Fe2O3复合BiOCl的制备及其光催化性能研究

Fe2O3 was synthesized by the solvothermal method, and the synthesized Fe2O3 was added in the process of preparing BiOCl by hydrolysis, and then Fe2O3/BiOCl photocatalytic materials with different composite ratios were prepared. The optimal Fe2O3/BiOCl (1Fe/50Bi) sample showed a highest photocatalytic efficiency for cationic dyes (Rhodamine B) and anionic dye (methyl orange) degradation irradiated with visible light, as compared with that of a bare BiOCl catalyst. Meanwhile, radical capturing experiments indicated that the photo-induced holes (h+) is the main active species. X-ray powder diffraction and ultraviolet-visible diffuse reflectance spectroscopy were used to characterize the structural and optical properties, which proved that Fe2O3 was successfully composited to the BiOCl surface and effectively reduced the bandgap of BiOCl. More importantly, the optimal 1Fe/50Bi sample shows the highest photocatalytic efficiency for tetracycline (TC) degradation (98%) irradiated with visible light, as compared with that of a bare BiOCl catalyst. Consequently, the Fe2O3/BiOCl photocatalyst have potential applications in environmental purification.