Yi Feng
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2026
ConceptGuard: Proactive Safety in Text-and-Image-to-Video Generation through Multimodal Risk Detection
Ruize Ma | Minghong Cai | Yilei Jiang | Jiaming Han | Yi Feng | Yingshui Tan | Bo Zhang | Xiangyu Yue
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Ruize Ma | Minghong Cai | Yilei Jiang | Jiaming Han | Yi Feng | Yingshui Tan | Bo Zhang | Xiangyu Yue
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Recent progress in video generative models has enabled the creation of high-quality videos from multimodal prompts that combine text and images. While these systems offer greater controllability, they also introduce new safety risks, as harmful content can arise from individual modalities or their interaction. Existing safety methods are often limited to text-only inputs, require the user to manually specify the risk category in advance, or only audit content after generation, making them unable to proactively address compositional multimodal risks. We present ConceptGuard, a safeguard framework that proactively detects and mitigates unsafe semantics in multimodal video generation before harmful content is produced. ConceptGuard operates in two stages. First, a contrastive detection module fuses image and text inputs and computes their similarity against the risk concept set , automatically retrieving the top-k concepts most relevant to the input without requiring any prior assumption about the risk category. Second, a semantic suppression mechanism uses these identified concepts to remove unsafe semantics from both the text and the visual input during early generation steps. To support training and evaluation, we introduce ConceptRisk, a large-scale dataset for multimodal risk detection, and T2VSafetyBench-TI2V, the first benchmark for evaluating safety in Text-and-Image-to-Video generation. Experiments on both benchmarks show that ConceptGuard outperforms existing baselines in both risk detection and safe video generation.
FailureMem: A Failure-Aware Multimodal Framework for Autonomous Software Repair
Ruize Ma | Yilei Jiang | Shilin Zhang | Zheng Ma | Yi Feng | Zhi Wang | Xiangyu Yue | Chuanyi Li | Vincent Ng | Lewei Lu
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Ruize Ma | Yilei Jiang | Shilin Zhang | Zheng Ma | Yi Feng | Zhi Wang | Xiangyu Yue | Chuanyi Li | Vincent Ng | Lewei Lu
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Multimodal Automated Program Repair (MAPR) extends traditional program repair by requiring models to jointly reason over source code, textual issue descriptions, and visual artifacts such as GUI screenshots. While recent LLM-based repair systems have shown promising results, existing approaches face several limitations: rigid workflow pipelines restrict exploration during debugging, visual reasoning is often performed over full-page screenshots without localized grounding, and failed repair attempts are rarely transformed into reusable knowledge. To address these challenges, we propose FailureMem, a multimodal repair framework that integrates three key mechanisms: a hybrid workflow–agent architecture that balances structured localization with flexible reasoning, active perception tools that enable region-level visual grounding, and a Failure Memory Bank that converts past repair attempts into reusable guidance. Experiments on SWE-bench Multimodal demonstrate FailureMem improves the resolved rate over GUIRepair by 3.7%.
Beyond Case-Level Similarity: Multi-Defendant Legal Case Retrieval via Individual-Aware Reasoning
Yi Yang | Ruize Ma | Yi Feng | Chuanyi Li | Vincent Ng
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Yi Yang | Ruize Ma | Yi Feng | Chuanyi Li | Vincent Ng
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Legal Case Retrieval (LCR) aims to identify cases that are legally similar to a given query case. Existing research has largely recast LCR as the task of modeling the textual similarity between the query case and a historical case. While this approach can handle single-defendant cases fairly easily, such surface-level matching proves insufficient for multi-defendant cases, which typically requires modeling and aligning defendants’ roles and judgment outcomes in different cases. To address the challenges associated with Multi-defendant LCR (Multi-LCR), we (1) present Multi-ELAM and Multi-LeCaRDv2, two multi-defendant datasets we create by enriching widely used benchmarks with defendant-level annotations, and (2) introduce a novel role- and judgment-aware framework for Multi-LCR. Experimental results show that our approach outperforms state-of-the-art baselines, highlighting its effectiveness for Multi-LCR.
Legal Judgment Prediction: A Reflection on the State of the Art
Yi Feng | Chuanyi Li | Vincent Ng
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
Yi Feng | Chuanyi Li | Vincent Ng
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
Automatic legal judgment prediction (LJP) has recently received increasing attention in the natural language processing community because of its practical values in the real world. Significant progress has been achieved on LJP in the past decade. However, most existing LJP research primarily focuses on developing methods that achieve better performance on standard evaluation datasets, with limited emphasis on the long-term advancement of the field beyond improving evaluation metrics. In this position paper, we reflect on the state of the art in LJP research, and explore issues that should motivate researchers to think beyond merely enhancing performance metrics, with the ultimate goal of sparking discussions among LJP researchers about the future trajectory of the field.
2025
Multimodal Neural Machine Translation: A Survey of the State of the Art
Yi Feng | Chuanyi Li | Jiatong He | Zhenyu Hou | Vincent Ng
Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing
Yi Feng | Chuanyi Li | Jiatong He | Zhenyu Hou | Vincent Ng
Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing
Multimodal neural machine translation (MNMT) has received increasing attention due to its widespread applications in various fields such as cross-border e-commerce and cross-border social media platforms. The task aims to integrate other modalities, such as the visual modality, with textual data to enhance translation performance. We survey the major milestones in MNMT research, providing a comprehensive overview of relevant datasets and recent methodologies, and discussing key challenges and promising research directions.
2024
CMDL: A Large-Scale Chinese Multi-Defendant Legal Judgment Prediction Dataset
Wanhong Huang | Yi Feng | Chuanyi Li | Honghan Wu | Jidong Ge | Vincent Ng
Findings of the Association for Computational Linguistics: ACL 2024
Wanhong Huang | Yi Feng | Chuanyi Li | Honghan Wu | Jidong Ge | Vincent Ng
Findings of the Association for Computational Linguistics: ACL 2024
Legal Judgment Prediction (LJP) has attracted significant attention in recent years. However, previous studies have primarily focused on cases involving only a single defendant, skipping multi-defendant cases due to complexity and difficulty. To advance research, we introduce CMDL, a large-scale real-world Chinese Multi-Defendant LJP dataset, which consists of over 393,945 cases with nearly 1.2 million defendants in total. For performance evaluation, we propose case-level evaluation metrics dedicated for the multi-defendant scenario. Experimental results on CMDL show existing SOTA approaches demonstrate weakness when applied to cases involving multiple defendants. We highlight several challenges that require attention and resolution.
LJPCheck: Functional Tests for Legal Judgment Prediction
Yuan Zhang | Wanhong Huang | Yi Feng | Chuanyi Li | Zhiwei Fei | Jidong Ge | Bin Luo | Vincent Ng
Findings of the Association for Computational Linguistics: ACL 2024
Yuan Zhang | Wanhong Huang | Yi Feng | Chuanyi Li | Zhiwei Fei | Jidong Ge | Bin Luo | Vincent Ng
Findings of the Association for Computational Linguistics: ACL 2024
Legal Judgment Prediction (LJP) refers to the task of automatically predicting judgment results (e.g., charges, law articles and term of penalty) given the fact description of cases. While SOTA models have achieved high accuracy and F1 scores on public datasets, existing datasets fail to evaluate specific aspects of these models (e.g., legal fairness, which significantly impact their applications in real scenarios). Inspired by functional testing in software engineering, we introduce LJPCHECK, a suite of functional tests for LJP models, to comprehend LJP models’ behaviors and offer diagnostic insights. We illustrate the utility of LJPCHECK on five SOTA LJP models. Extensive experiments reveal vulnerabilities in these models, prompting an in-depth discussion into the underlying reasons of their shortcomings.
2022
Legal Judgment Prediction via Event Extraction with Constraints
Yi Feng | Chuanyi Li | Vincent Ng
Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
Yi Feng | Chuanyi Li | Vincent Ng
Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
While significant progress has been made on the task of Legal Judgment Prediction (LJP) in recent years, the incorrect predictions made by SOTA LJP models can be attributed in part to their failure to (1) locate the key event information that determines the judgment, and (2) exploit the cross-task consistency constraints that exist among the subtasks of LJP. To address these weaknesses, we propose EPM, an Event-based Prediction Model with constraints, which surpasses existing SOTA models in performance on a standard LJP dataset.