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Si-Song Bei

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#machine learning Preprint Oct 2026

Contextual Credit Policy Optimization

Group-based reinforcement learning enables large language model agents to learn from sparse outcome rewards in long-horizon tasks. Recent methods derive step-level credit by comparing observation-matched experiences across trajectories. However, identical observations can occur in different contexts, and matched peers...

Hui-Wen Han, Zi-Yao Zeng, Zi-Hao Zhu et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Clarify, Then Focus: Statement Normalization for Conversation Analytics at Scale

A simple principle is proposed: clarify the text, then focus the reader, sharing this preparation across questions supports an inference pipeline built entirely from small models, making analytics over millions of conversations substantially less expensive.

Mikhail L. Arbuzov, Karan Dave, Evgeniya Dontsova et al. · 0 citations
Preprint Aug 2026

OmniRouting: A Semantic-Coupled Multimodal Benchmark for Constraint-Aware Spatial Reasoning in PCB Routing

OmniRouting is the first large-scale benchmark designed to evaluate LLMs on printed-circuit-board (PCB) routing reasoning under real-world industrial design-rule, manufacturability, and connectivity constraints, and reveals substantial limitations of current LMMs in PCB routing.

Tai-Ting Lu, Kai-Yuan Lin, Zi-Wei Dong et al. · 0 citations
Preprint Aug 2026

OmniCAD: A Large-Scale Benchmark for 3D Spatial Reasoning in Robotics Assemblies

OmniCAD is introduced, a large-scale benchmark for assembly-aware 3D spatial reasoning across diverse industrial systems, including robotic mechanisms, automotive components, aerospace structures, and agricultural machinery, and tool-augmented agentic reasoning.

Mingjia Wang, Tai-Ting Lu, Zi-Wei Dong et al. · 1 citation
Preprint Aug 2026

OmniMech: All-in-one Multimodal Mechanical Benchmark for 3D Reconstruction

OmniMech is introduced, the first million-scale benchmark for evaluating VLMs on executable CAD generation from industrial manufacturing data, and experiments show that current VLMs and CAD-specialized models still struggle with executable program synthesis, fine-grained 3D reconstruction, and reliable enforcement of d...

Tai-Ting Lu, Run-Ze Liu, Zi-Wei Dong et al. · 0 citations

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