Research on Oil and Gas Pipeline Operation Optimization Based on Improved Newton-Raphson MethodLinjie Duan, Lipeng Zhang, Chunfeng Jiao, Rui Dang, Xudong Li and Jinggang CaoE3S Web Conf., 261 (2021) 01068DOI: https://doi.org/10.1051/e3sconf/202126101068