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Wei Cheng

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Preprint Oct 2026

OOPMAS: Object-Oriented Multi-Agent Systems for Query-Level Workflow Generation

Multi-agent systems (MAS) powered by large language models have shown strong performance across code generation, mathematical reasoning, and question answering. However, existing methods for automating MAS design mostly operate at the task level, producing a single fixed workflow per benchmark that is applied uniformly...

Qi Cheng, Sheng-Yu Chen, Wei Cheng et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Do Time-Series QA Systems Read the Time Series? Evidence Use and Reasoning Reliability

In recent years, time-series question answering (QA) systems have made significant progress. However, generating a correct answer does not show whether retaining the supplied numerical series improves task performance, nor whether the prediction is sensitive to changes in that input. While some systems provide rational...

Zhuo-Min Chen, Jing-Chao Ni, Xu Zheng et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Pay for the Fault, Not the Flow: Label-Free In-Flow Multi-Agent Workflow Optimization

Large language models (LLMs) increasingly construct multi-agent workflows that decompose a complex task and assign specialist agents from a pool. However, building such a workflow well remains challenging: how finely to divide the task, which agent to trust with each subtask, and when to create a new specialist are all...

Xue-Hang Guo, Hao-Yu Wang, Sheng-Yu Chen et al. · 0 citations
Preprint Aug 2026

Towards A Unified Information Bottleneck Framework for Time Series Explanations

A unified objective function for explainable time series learning that bridges attribution and counterfactual reasoning within a single framework is proposed and a novel explanation framework is introduced that learns a parametric transformation network to construct explanation-embedded instances.

Xu Zheng, Zichuan Liu, Zhuo-Min Chen et al. · 0 citations
Jul 2026

Information Bottleneck Learning for Faithful Time Series Forecasting Explanations

IB-Forecast is proposed, an inherently interpretable multivariate time-series forecasting framework that decomposes forecasting into a learned periodic component and a residual component computed with explainable masks over input tokens that guarantees high explanation fidelity.

Xu Zheng, Wei Cheng, Zhuomin Chen et al. · 2 citations
#artificial intelligence Preprint Aug 2026

MetaCaster: Meta-Harness-Optimized Agent for End-to-End Few-Shot Learning of Lightweight Time Series Forecasters

This work proposes MetaCaster, a meta-harness-optimized multi-agent framework that uses agentic data generation to automatically train specialized lightweight forecasters from only a few examples and textual contexts and highlights a new TSF paradigm in which agents act not as forecasters but as intermediary engineers...

Chengao Shen, Wen-Chao Yu, Fang-Yu Wu et al. · 0 citations
Jul 2026

Leveraging Trajectory Graphs for Pre-Execution Error Diagnosis in Agentic LLM Systems

This work proposes Trajectory Graph Copilot, a novel framework that acts as a ``copilot'' for LLM agents by diagnosing potential action errors before they are executed, significantly enhancing the agent's ability to complete long-horizon tasks successfully.

Xu Zheng, Zhuomin Chen, Chaohao Lin et al. · 0 citations
Jul 2026

Bridging Inference-Time Scaling and Episodic Memory with Action-Centric Graphs

A novel framework, \textit{GAMER}~(Graph-based Action-centric Memory with Episodic Reasoning), that bridges the gap between inference scaling and episodic memory by decoupling the memory mechanism from LLMs.

Xu Zheng, Chaohao Lin, Zhuomin Chen et al. · 0 citations

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