الباحثون

Chi Zhang

المنشورات 11

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Interaction-Stiffness-Guided Basis Allocation in Dynamic Movement Primitives for Efficient Skill Transfer

Chan Xu, Silu Chen, Dehao Wang وآخرون · 2026 · 10.1109/tii.2026.3738846

Dynamic Movement Primitives (DMPs) provide a compact and stable formulation for trajectory representation and generalization in robot skill learning. However, their predefined basis layout limits the allocation of approximation capacity according to stage-dependent precision requirements. To address this issue, this ar …

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GRAFT: Growing Agglomerative Foundation Models via Continual Teacher Distillation

Zhenghao Zhao, Chi Zhang, Qingshuang Chen وآخرون · 2026

Vision foundation models such as DINOv2, SigLIP2, and MASt3R develop complementary capabilities from different pretraining objectives, yet their knowledge remains distributed across separate, specialized models. Multi-teacher knowledge distillation offers a path toward consolidating these capabilities into a single agg …

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DeFA: Dependency-Guided Failure Attribution for LLM Agents

Bo Deng, Xinlei Zheng, Yi Wei وآخرون · 2026

Errors in LLM agent executions and their visible consequences can be separated by many steps, making decisive-error localization a matter of understanding both step content and step dependencies. We introduce DeFA, a dependency-guided framework for agent failure attribution. DeFA first combines protocol relations and s …

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Motion Concept Unlearning in Video Diffusion Models

Ping Liu, Chi Zhang · 2026

Text-to-video (T2V) diffusion models can generate realistic depictions of actions such as kicking, stabbing, and shooting, raising safety concerns that motivate targeted concept erasure. Although concept erasure has been extensively studied for static concepts in text-to-image and T2V models, erasing motion concepts re …

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SimpleEvol: An Agent-Loop Framework for LLM-Driven Automated Heuristic Design with Minimal Human Priors

Jianghan Zhu, Cong Zhang, Rongjie Zhu وآخرون · 2026

Large language models (LLMs) have emerged as powerful tools for automated heuristic design (AHD), enabling iterative generation and refinement of heuristics. However, the dominant paradigm embeds LLMs as narrow, fixed components, such as crossover or mutation, within heavily hand-engineered evolutionary frameworks. We …

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When Privacy Becomes a Weapon: Understanding Doxxing and Privacy Vulnerabilities in Mainland China's Social Media Ecosystem

Xiao Zhan, Shijing He, Chi Zhang وآخرون · 2026

Doxxing, the malicious disclosure of personal information, has become a pervasive privacy threat. Yet existing research remains predominantly Western-centric, limiting our understanding of how doxxing unfolds in contexts where mandatory identity systems, platform governance, and cultural logics fundamentally reshape pr …

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FutureDuet: Decoupling Observation Access from Future Supervision in World Action Models

Jie Wu, Yuzhi Huang, Junqi Liu وآخرون · 2026

World Action Models (WAMs) augment robot action generation with future visual supervision. Existing WAMs commonly fuse main and wrist observations into one visual stream and train both with the same future-video objective, despite their different visual dynamics. A stable main camera reveals scene-level task evolution, …

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Unifying Distributional Training for One-Step Visual Generation

Chi Zhang, Shi Haoyang, Yueyi Liu وآخرون · 2026

Distributional training provides collective supervision for one-step visual generation by matching real and generated features in frozen representation spaces. We introduce a unified theoretical framework that separates distribution modeling from matching discrepancy and connects global objectives to pointwise feature …

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