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Ziyang Wang

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Preprint Aug 2026

D2-ScaleAgent: Dual-Dimensional Scaling for Long Document Understanding

The core of D2-ScaleAgent is a Verifier agent-driven dynamic routing loop based on the intrinsic difficulty of the query, centered around a continuously updated evidence bank that serves as the agent's dynamic working memory.

Hao Zhang, Longrong Yang, Lunhao Duan et al. · 0 citations
Jul 2026

Searching Videos as Trees: Self-Correcting Agents for Grounded Long Video QA

VideoTreeSearch (VTS) is proposed, a framework that casts grounded LVQA as iterative self-correcting search over an adaptive temporal tree, and trains an agent to navigate the tree through four discrete operations: zoom_in, zoom_out, shift, and answer.

Ce Zhang, Ziyang Wang, Yu-Lu Pan et al. · 0 citations
Jul 2026

Evidence-Backed Video Question Answering

ST-Evidence is introduced, the first human-verified benchmark for both discriminative and generative pixel-level grounding, and scalable, automated generation pipelines are developed to create ST-Evidence-Instruct, a 160k-scale dataset bridging high-level reasoning with fine-grained grounding.

Shijie Wang, Honglu Zhou, Ziyang Wang et al. · 0 citations

EgoMemReason: A Memory-Driven Reasoning Benchmark for Long-Horizon Egocentric Video Understanding

EgoMemReason is introduced, a comprehensive benchmark for week-long egocentric video understanding through memory-driven reasoning that evaluates three complementary memory types: entity memory, tracking how object states evolve and change across days; event memory, recalling and ordering activities separated by hours or days; and behavior memory, abstracting recurring patterns from sparse, repeated observations over the whole week period.

Ziyang Wang, Yue Zhang, Shoubin Yu et al. · 2 citations

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