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Kai Feng

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#artificial intelligence Preprint Oct 2026

DIVA: Dual-Space Intent-Aware Visual Attenuation for Vision-Language-Action Policies

Vision-language-action (VLA) policies typically feed dense visual patch tokens into a language-action backbone, preserving scene context but offering no explicit mechanism to regulate how strongly different visual tokens influence policy computation. We introduce DIVA, a Dual-Space Intent-Aware Visual Attenuation modul...

Kai Feng, Guoheng Sun, Zi-Yao Wang et al. · 0 citations
#artificial intelligence Preprint Oct 2026

PAIR: Bridging Perception and Action in Vision-Language-Action Models

Vision-language-action (VLA) models map visual observations and language instructions to continuous robot actions. This task requires a transition from representations that describe the scene and instruction to representations that support action generation. Many continuous-action VLAs leave this transition implicit an...

Kai Feng, Guoheng Sun, Ang Li · 0 citations
Preprint Sep 2026

Causeway: Restoring Task Accessibility for Instruction Switching in VLA Policies

Vision-language-action (VLA) policies can execute many tasks from standard initial states, yet a new instruction may fail after another task has altered the robot's physical state. We study instruction switching, where a new task is issued during or after the execution of a different one. We observe that a target task...

Qing-Zi Wang, Kai Feng, Guang-Yao Shi et al. · 0 citations
Jun 2026

Drop-Then-Recovery: How Redundant Are Vision-Language-Action Models?

The results suggest that current VLA benchmarks may exert limited pressure on deep language grounding and compositional instruction understanding, and that future VLA architectures should allocate capacity more deliberately across language, vision, and action components.

Guoheng Sun, Kai Feng, Shwai He et al. · 0 citations

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