الباحثون

Zhen Tan

المنشورات 4

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Do More Modalities Always Help? A Geometric Perspective on Missing-Modality Robustness

Songyuan Sui, Zhen Tan, Mohan Zhang وآخرون · 2026

Missing modality remains a longstanding challenge in multimodal learning. Existing methods typically address this issue through modality recovery or adaptive strategies. However, they overlook models' internal cross-modal dependencies formed during multimodal training, which later impair robustness. We systematically c …

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On the Divergence of Accuracy and Mechanism Consistency in Time Series World Models

Haochen Zhang, Jiaheng Guo, Zhen Xu وآخرون · 2026

A time series world model (TSWM) predicts a controlled system's state from its observed history and planned actions and exogenous inputs. Current approaches build forecasters with actions as covariates, trained and evaluated on prediction error under the executed plan. Yet world models compare unexecuted plans, but the …

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MERID: Multimodal Exploration via Recursive Self-Improvement Agents for Major Depression Analysis

Lei Liu, Zhaokang Liang, Qingcheng Zeng وآخرون · 2026

Major depressive disorder (MDD) severely impacts daily activities and quality of life. Detecting MDD involves multimodal data, such as interview recordings and sensor measurements. This is particularly challenging, as these heterogeneous modalities often demand distinct, customized prediction pipelines. Existing effort …

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