A hierarchical-learning-based crowdedness estimation mechanism for crowdsensing buses. - Xiaoguang Niu; Zhen Wang; Qiongzan Ye; Yihao Zhang 011; Jiawei Wang 020 (IPCCC, 2017)

A Privacy-Preserving Incentive Mechanism for Participatory Sensing Systems. - Xiaoguang Niu; Jiawei Wang 020; Qiongzan Ye; Yihao Zhang 011 (Secur. Commun. Networks, 2018)