Advanced Materials Research Vols. 396-398

Abstract: Based on Reynolds equation, the numerical simulation of thermal elstohydronamic lubrication for seawater-lubricated thordon bearing was carried out, the effects of the load, the speed and the shaft diameter on the pressure and the film thickness were discussed. The results show that thermal effect has little effect on the pressure, but the film thickness under the thermal condition is smaller than isothermal. The pressure peak is increased and the film thickness is decreased greatly with the increase of load. The pressure peak is decreased and the film thickness is increased greatly with the increase of speed.

Abstract: Vehicular Ad Hoc Networks (VANET) is a peculiar type of mobile Ad Hoc networks for ITS,compared with MANET, it has following distinguishing feature: high dynamic topology changing, speed-moving nodes, frequently disconnected network, unlimited battery power and storage, network node movement restraind by traffic rule. The article definition the concept collision-set,and derive a novel collision-avoiding aware routing based on real-time hybrid-traffic infomations which restricted by traffic rule(RHCAR). Nodes will builting subnetworks based on collision-set, every node will communicate with its neighbours of collision-set for collision-avoiding,extensive simulations the collision-avoiding trend with two type of scenario.

Abstract: A natural ditch wetland grown with nature annual bluegrass (Poa annua L.), alligator weed (Alternanthera philoxeroides (Mart.) Griseb.), common duckweed (Lemna minor L.) and curly pondweed (Potamogeton crispus L.) etc. were selected to study the removal capacity of agricultural non-point source pollutants in the Maixi River in Guiyang City, the capital of Guizhou Province, China. The removal characteristics and seasonal variation of chemical oxygen demand (COD), total phosphorus (TP), ammonia-nitrogen (NH+4-N), and suspended solids (SS) in the ditch water was studied. The results showed that there existed a certain seasonal diversity in the removal characteristics of nitrogen, phosphorus and organic pollutants by the ditch. The removal efficiency of TP, COD and SS demonstrated an increasing tendency with their increasing concentration at the ditch inlet, whereas that of the NH4+-N displayed contrary tendency as the concentration of NH4+-N increased.

Abstract: Situations of the CO₂ emission in steel industry at home and abroad are introduced in this paper firstly. Then CO₂ emission is calculated in the RHF—EAF flow for treating V-Ti magnetite according to data from the pilot plant in Pangang Group. Besides, CO₂ emission of the traditional BF process is calculated as well. The results show that CO₂ emission is 1427.3kg/t pig iron and 1508.7kg/t for the pilot and BF process, respectively. Otherwise, the difference between the two processes is analyzed and the prospect for the reduction of CO₂ emission in the iron and steel industry is proposed as well.