Research on carbon dioxide emission factor characteristics of multi-type heavy-duty vehiclesDaoyuan Yang, Xinyu Zhang, Rui Wu, Yu Liu, Hanzhengnan Yu, Xi Hu, Kunqi Ma, Yongkai Liang, Hang Xu and Hao ZhangE3S Web of Conf., 536 (2024) 01010DOI: https://doi.org/10.1051/e3sconf/202453601010