Liu, Zhang, and Zhewei Ye. “Research on the Identification of Structural Size Parameters in Beam Pumping Units Using an Enhanced Particle Swarm Optimization Algorithm”. Scientific Journal of Technology 7, no. 3 (March 19, 2025): 31–42. Accessed August 22, 2026. https://sjtechnology.org/index.php/ojs/article/view/44.