Research on full cycle evaluation of power grid projects based on rough set-multilevel extension theoryYuheng Sha, Jun Yan, Yanlai Zhang, Wenlong Li, Wenqi Li, Yannan Guo, Yuqian Zhang and Jing ZhangE3S Web Conf., 292 (2021) 01016DOI: https://doi.org/10.1051/e3sconf/202129201016