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Peng-Cheng Weng

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#machine learning Preprint Aug 2026

DiFA: Dual Evidence Fusion and Aggregation for Token-Level Text Anomaly Detection

A Dual-evidence framework with adaptive Fusion and Aggregation (DiFA) for token-level anomaly detection, which derives anomaly scores from form-structural and semantic views to capture visible structural abnormality and contextual inconsistency, thereby providing complementary evidence for identifying diverse anomalies...

Yan-Yu Qian, Peng-Cheng Weng, Yue Tan et al. · 0 citations
#machine learning Preprint Sep 2026

Exact Regret Frontiers and Externality Scheduling in Centralized Serial-Dictatorship Bandits

Exploration in centralized serial-dictatorship matching bandits must use complete matchings, so learning one player--arm pair can impose regret on others. We study this externality under a known common priority order and Gaussian rewards with unit variance. We show that the matching-level Graves--Lai constraints reduce...

Li-Sha-Ge-Yuan-Yuan Xu, Guo-Dong Ma, Peng-Cheng Weng et al. · 0 citations
#machine learning Preprint Jan 2026

Diverse via bounded Agreement: Geometric Regularization for Multimodal Fusion

The results suggest that explicitly regulating representation geometry is an effective complement to optimization balancing, and provide evidence that geometry-aware regularization can improve multimodal learning across diverse architectures and domains.

Zixuan Xia, Hao Wang, Peng-Cheng Weng et al. · 1 citation
Preprint Jun 2026

TRE: Training-Free Hallucination Detection for Diffusion Language Models

TRE is a parameter-free and single-run metric that estimates hallucination risk directly from the entropy signals of a single generation, without requiring any detector training or repeated sampling, and enjoys strong generalizability, efficiency, and robustness.

Pengcheng Weng, Y. Qian, Yue Tan et al. · 0 citations

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