Papers by Weixin Chen
SEAL: Interactive Tool for Systematic Error Analysis and Labeling (2022.emnlp-demos)
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| Challenge: | Existing models that fail on tail data or rare groups are difficult to identify due to lack of explicit labels. |
| Approach: | They propose a systematic error analysis and labeling tool that uses a two-step approach to identify high-error slices of data and then give human-understandable semantics to those underperforming slices. |
| Outcome: | The proposed tool identifies high-error slices of data and gives human-understandable semantics to those underperforming slices. |
Causal Intervention and Counterfactual Reasoning for Multi-modal Fake News Detection (2023.acl-long)
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| Challenge: | Existing methods for multi-modal fake news detection neglect the fact that some label-specific features cannot generalize well to the testing set, thus suffering from the latent data bias. |
| Approach: | They propose a Causal intervention and Counterfactual reasoning based debiasing framework for multi-modal fake news detection that eliminates the image-only bias by deducting the direct effect of the image from the total effect on labels. |
| Outcome: | The proposed framework eliminates the psycholinguistic bias in the text and the bias of inferring news label based on only image features. |
MemRec: Collaborative Memory-Augmented Agentic Recommender System (2026.acl-long)
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Weixin Chen, Yuhan Zhao, Jingyuan Huang, Zihe Ye, Mingxuan Ju, Tong Zhao, Neil Shah, Li Chen, Yongfeng Zhang
| Challenge: | Existing recommender systems rely on semantic user and item memories to make predictions, but these memories are kept in isolation. |
| Approach: | They propose a framework that architecturally decouples memory management from reasoning to decouple memory management and reasoning from the user and item memories. |
| Outcome: | The proposed framework decouples memory management from reasoning and achieves state-of-the-art performance on four benchmarks. |
H-Mem: Hybrid Multi-Dimensional Memory Management for Long-Context Conversational Agents (2026.eacl-long)
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| Challenge: | Existing frameworks for long-context conversational agents struggle to organize information across dimensions like time and topic, leading to poor retrieval. |
| Approach: | They propose a Hybrid Multi-Dimensional Memory architecture that stores conversational facts in two parallel hierarchical data structures: a temporal tree that organizes information chronologically and a semantic tree that arranges it conceptually. |
| Outcome: | The proposed architecture improves performance on long-context QA datasets by 8.4% compared to current systems. |