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cs.LG2026
CoDrift: Compositional Drifting for Offline Reinforcement Learning
Xiewei Ni, Ruofeng Mei, Xiangyu Xu
Offline reinforcement learning is intrinsically multi-objective: a policy must remain compatible with the behavioral support of a fixed dataset while preferentially selecting high-…
cs.LG2026
TimeMar: Multi-Scale Autoregressive Modeling for Unconditional Time Series Generation
Xiangyu Xu, Qingsong Zhong, Jilin Hu
Generative modeling offers a promising solution to data scarcity and privacy challenges in time series analysis. However, the structural complexity of time series, characterized by…