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铁道部调整部分列车运行图新增图定旅客列车10对:北京西～延安T436T454次,经由京广、陇海、西延线;泰州～哈尔滨T15767T15858次,经由宁启、新长、陇海、京沪、京哈(狼窝铺～秦皇岛间经京山线)线,进北京;泰州～深圳K941K923次,经由宁启、京沪、水蚌、淮南、合九、京九线;泰州～兰州K41989K4201720次,经由宁启、新长、陇海线;泰州～成都K24585K24676次,经由宁启、新长、陇海、宝成线;泰州～青岛K41545K41636次,经由宁启、新长、胶新、胶济线;泰州～杭州T7585T7567,经由宁启、京沪、沪杭线;吉安～深圳K412次,经由京九、广深线;吉安～北京…     

铁路货运安全管理工作研讨会在石家庄召开

2004年10月27—29日，铁道部运输局在石家庄召开铁路货运安全管理工作研讨会。14个铁路局、青藏公司、特货公司、集装箱公司、北京交大、铁科院电子所、运输所、国家轨道衡计量站参加了会议。     

铁道部调整部分列车运行图

新增图定旅客列车10对: 北京西～延安T43/6 T45/4次,经由京广、陇海、西延线; 泰州～哈尔滨T157/6/7T158/5/8次,经由宁启、新长、陇海、京沪、京哈(狼窝铺～秦皇岛间经京山线)线,进北京;     

浅谈汽车工业对塑料橡胶的需求

为适心汽车工业的飞速发展，简要介绍了世界汽车材料的发展趋势，重点分析了汽车工业用塑料及橡胶的发展趋势，对汽车丁业用塑料及橡胶制品的需求量作了预测，同时对汽车工业用塑料及橡胶的前景进行了展望。     

Modified QUICK schemes for 3D advection-diffusion equation of pollutants on unstructured grids

In the framework of finite volume method (FVM), two modified schemes of quadratic upstream interpolation for convective kinematics (QUICK), namely quasi-QUICK (Q-QUICK) and normal quasi-QUICK (NQ-QUICK), for improving the precision of convective flux approximation are verified in 3D unsteady advection-diffusion equation of pollutants on unstructured grids. The constructed auxiliary nodes for Q-QUICK or NQQUICK are composed of two neighboring nodes plus the next upwind node; the later node is generated from intersection of the line of current neighboring nodes and their corresponding interfaces. The numerical results show that Q-QUICK and NQ-QUICK overwhelm central differencing scheme (CDS) in computational accuracy and behave similar numerical stability to upwind difference scheme (UDS), hybrid differencing scheme (HDS) and power difference scheme (PDS) after applying the deferred correction method. Their corresponding CPU time is approximately equivalent to that of traditional difference schemes. In addition, their abilities for adapting high grid deformation are robust. It is so promising to apply the suggested schemes to simulate pollutant transportation on arbitrary 3D natural boundary in the hydraulic or environmental engineering.