This author has not been identified. Look up 'Hong Liu' in GoogleThis author has not been identified. Look up 'Wanhui Wen' 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 'Guangyuan Liu' in GoogleThis author has not been identified. Look up 'Zhaofang Yang' in Google