This author has not been identified. Look up 'Zhenguang Liu' in GoogleThis author has not been identified. Look up 'Yingjie Xia' in GoogleThis author has not been identified. Look up 'Qi Liu' in GoogleThis author has not been identified. Look up 'Qinming He' in GoogleThis author has not been identified. Look up 'Chao Zhang' in GoogleThis author has not been identified. Look up 'Roger Zimmermann' in Google