Modeling futures market risk simultaneously influenced by macro low-frequency information and daily risk factors is a valuable challenge. We propose a new general framework for it based on the flexible GARCH-MIDAS model. It uses a skewed t distribution to describe the asymmetry of long and short...

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...