Haze pollution in early winter(December and January) in the Yangtze River Delta(YRD) and in North China(NC)are both severe;however, their monthly variations are
Many previous studies have demonstrated that the boreal winters of super El Ni?o events are usually accompanied by severely suppressed Madden-Julian oscillation
In order to accommodate the complex network data of large scale companies,this thesis analyses PMI,strategy and role hierar-chical model.On such a basis,the the