This author has not been identified. Look up 'Chuang Ma' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Hao Chen' in GoogleThis author has not been identified. Look up 'Mingming Xin' in GoogleThis author has not been identified. Look up 'Ruolin Yang' in GoogleThis author has not been identified. Look up 'Xiangfeng Wang' in Google