鹤洞大桥：泥头车对撼大客车

12月9日6时，一辆满载散体物料的泥头车在广州鹤洞大桥由北向南方向爬坡行驶时，突然车身失控，在推倒大桥中间十几米铁护栏后，一头撞向迎面驶来的一辆大客车。事故致两车损毁严重，鹤洞大桥一度双向塞车严重。     

2009中国中部（郑州）国际装备制造业博览会物料搬运及起重运输系统专题展

会展描述：“2009中国中部（郑州）国际装备制造业博览会物料搬运及起重运输系统专题展”是“中部制博会”的重要组成部分,由中国机械工业联合会（原国家机械工业部）与河南、安徽、湖南、江西四省政府相关部门及行业协会、学会共同主办。为贯彻国家关于“促进中部崛起”的发展战略,“中部制博会”围绕中部地区制造业尤其是机电制造业新型工业化的发展需要,致力于国际化、     

从搬运工到全国先进工作者——记全国先进工工作者、兴宁市交通局局长刘兴宏

今年53岁的兴宁市交通局局长刘兴宏,在去年摘取了“广东省劳动模范”、“南粤杰出劳模”等荣誉称号和今年初被授予“广东省第三届人民满意的公务员”称号的基础上,今年“五一”前夕又被评为“全国先进工作者”。4月27日,他和来自全国各行各业的近3000名全国劳动模范及先进工作者一起步入人民大会堂,受到了胡锦涛等党和国家领导人的接见。     

Fabrication of a Novel Porous Poly（Vinylidene Fluoride） Blend Five-Bore Membrane for Wastewater Treatment

Porous poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blend five-bore hollow fiber membranes are prepared by wet phase inversion methods. In spinning these PVDF hollow fibers, N, N-dimethylacetamide (DMAc) and polyvinyl pyrrolidone (PVP) are used as the solvent and the non-solvent additive, respectively. The external coagulant uses water. The internal coagulants use water and DMAc-water solutions. The membranes are characterized in terms of water flux and molecular weight cut-off for the wet membranes. The cross-sectional structures are examined by scanning electron microscopy (SEM). The effects of polymer concentration and the internal coagulant on the permeation properties and membrane structures are examined keeping the bore liquid flow and air-gap constants. Relative high flux, rejection and strengh PVDF five-bore hollow fiber membranes could be prepared from the polymer concentration in dope solution at 17% of mass fraction, the air gap distance of 14 cm, and using 10% of mass fraction of DMAc solution as the internal coagulant at 13mL/min of flow.