PHAT: Modeling Period Heterogeneity for Multivariate Time Series Forecasting - Ma, Jiaming; Huang, Qihe; Ma, Haofeng; Wang, Guanjun; Huang, Sheng; Zhou, Zhengyang; Wang, Pengkun; Wang, Xu; Wang, Binwu; Wang, Yang (International Conference on Learning Representations, 2026)