One important part of designing and manufacturing of the fuel cells is their model identification. The present study proposes an optimal method for optimal parameter estimation of the undetermined parameters in Proton Exchange Membrane Fuel Cells (PEMFCs). The method uses a novel modified...

Wind environment research in the populated urban area is an important topic on wind potential evaluation as well as wind comfort analysis. This study took measurement of 57 crossroad spots in the campus in North China University of Technology in Beijing. The data of wind speed and direction were...

The shared bicycles had become an important choice for Beijing citizens to travel "the last kilometer" on a daily basis. By replacing buses and cars, sharing bicycles can reduce urban carbon emissions, and only occupy a small area of parking space, thus improving urban land use efficiency. A...