CombinationTS: A Modular Framework for Understanding Time-Series Forecasting Models. - Xiaorui Wang; Fanda Fan; Chenxi Wang 006; Yuxuan Yang; Rui Tang; Kuoyu Gao; Simiao Pang; Yuanfeng Shang; Zhipeng Liu; Wanling Gao; Lei Wang 004; Jianfeng Zhan (CoRR, 2026)