最近的铁道车辆技术

介绍了日本铁道综合技术研究所在铁道车辆技术方面的5项课题中所取得的成就,包括导向转向架、客车车厢内的降噪技术、车辆的动力学仿真、永磁同步电动机、车辆技术开发过程中用于闭环仿真的硬件等。其中前景看好的永磁同步电动机已取得了很大进展。     

日本铁道车辆用超导变压器的开发

介绍了日本铁道车辆用超导变压器的设计研发过程、主要技术参数和定型试验.     

The nitrogen cycle in tidal flats and eelgrass beds of Ise Bay

A tidal flat-sea grass bed ecosystem model was formulated and applied to Ise Bay to evaluate the purification capability of the shallow-water region where a new airport is expected to be built. The model results were in the range of the observed biomass for each state variable in the model. The purification capability of this shallow-water region is estimated from the model results. The inorganic nitrogen removal is estimated at 56 kg N day⁻¹; the organic particulate nitrogen removal by suspension feeders is 95 kg N day⁻¹; the organic nitrogen removal by harvest and fish predation is 25 kg N day⁻¹, and the purification capability of this site is 51 kg N day⁻¹. Potential loss of the sea grass bed by reclamation will reduce the removal ability of inorganic nitrogen as well as food sources for juvenile fishes.