2026 arXiv Quantum End-to-End Learning for Contextual Combinatorial Optimization Jaehwan Lee and Changhyun Kwon arXiv preprint arXiv:2605.20222, May 2026 arXiv 2024 IEEE TSG Supervised Optimization Framework for Charging and Discharging Controls of Battery Energy Storage Jaehwan Lee and Soongeol Kwon IEEE Transactions on Smart Grid, Nov 2024 DOI