This author has not been identified. Look up 'Xiaoqiang Li' in GoogleThis author has not been identified. Look up 'Qi Zhou' in GoogleThis author has not been identified. Look up 'Hui Dai' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Jie Zhang' in GoogleThis author has not been identified. Look up 'Ying Li' in Google