马明睿和胡未央于2025年5月20日下午完成了博士学位论文答辩。他门的论文题目是“减排背景下中国大气活性氮沉降时空变化、驱动因素及超临界负荷研究”和“中国空气污染及其健康负担对前体物排放变化的响应特征研究”。论文委员会的主席是王勤耕教授，其他委员会成员包括赵天良教授，王体健教授，谢旻教授和余倩助理教授。

      祝贺马明睿和胡未央！

    Mingrui Ma and Weiyang Hu finished their PhD thesis defense on May 20th 2025. The title of their thesis are "Spatiotemporal Variations, Driving Factors, and Critical Load Exceedance of Atmospheric Reactive Nitrogen Deposition in China under Emission Reduction Background"and "Study on the response characteristics of air pollution and its health burden in China to changing precursor emissions". The chair of dissertation committee is Prof. Qin'geng Wang, and other committee members include Prof. Tianliang Zhao, Tijian Wang, Min Xie and Qian Yu .                       

        Congratulations to Mingrui Ma and Weiyang Hu!