Research on Holographic Multidimensional Evaluation System of Suppliers in Pumped Storage EnterprisesHongliang Wang, Xiaoran Pang, Yeting Wang, Yujian Zhang, Xi Yin, Tong Chen and Yang YaoE3S Web Conf., 275 (2021) 03082DOI: https://doi.org/10.1051/e3sconf/202127503082