This author has not been identified. Look up 'Huafeng Wang' in GoogleThis author has not been identified. Look up 'Wenfeng Song' in GoogleThis author has not been identified. Look up 'Wanquan Liu' in GoogleThis author has not been identified. Look up 'Ning Song' in GoogleThis author has not been identified. Look up 'Yuehai Wang' in GoogleThis author has not been identified. Look up 'Haixia Pan' in Google