Author name cluster

Yuanfeng Song

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5 papers

1 author row

IJCAI Conference 2025 Conference Paper

Deduction with Induction: Combining Knowledge Discovery and Reasoning for Interpretable Deep Reinforcement Learning

Haodi Zhang
Xiangyu Zeng
Junyang Chen
Yuanfeng Song
Rui Mao
Fangzhen Lin

Deep reinforcement learning (DRL) has achieved remarkable success in dynamic decision-making tasks. However, its inherent opacity and cold start problem hinder transparency and training efficiency. To address these challenges, we propose HRL-ID, a neural-symbolic framework that combines automated rule discovery with logical reasoning within a hierarchical DRL structure. HRL-ID dynamically extracts first-order logic rules from environmental interactions, iteratively refines them through success-based updates, and leverages these rules to guide action execution during training. Extensive experiments on Atari benchmarks demonstrate that HRL-ID outperforms state-of-the-art methods in training efficiency and interpretability, achieving higher reward rates and successful knowledge transfer between domains.

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IJCAI Conference 2025 Conference Paper

HealthLens: A Natural Language Querying System for Interactive Visualization of Electronic Health Records

Haodi Zhang
Siqi Ning
Qiyong Zheng
Yuanfeng Song
Liang-Jie Zhang

As an essential part of modern healthcare systems, extracting valuable insights from electronic medical records (EMRs) remains challenging due to the complexity of structured and unstructured data. Data visualization is essential for transforming complex data into comprehensible visuals that enable professionals to identify patterns and trends. This process involves selecting data attributes, transforming the data, choosing appropriate visual encoding methods, and rendering graphical representations using declarative visualization languages (DVLs). However, achieving proficiency in DVLs requires a deep understanding of domain-specific data and expertise in these languages, which poses a significant barrier for beginners and non-technical users. To address these challenges, we present HealthLens, the first user-friendly visualization tool in the EMR domain that eliminates the need for prior knowledge of DVLs. Built on the MedCodeT5 model developed by us and leveraging a large language model with a bilevel optimization approach, HealthLens enables the generation of EMR visualizations from natural language queries. This demonstrates the feasibility of creating sophisticated visualizations with minimal technical expertise, advancing accessibility in the EMR field.

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IJCAI Conference 2025 Conference Paper

SSPNet: Leveraging Robust Medication Recommendation with History and Knowledge

Haodi Zhang
Jiawei Wen
Jiahong Li
Yuanfeng Song
Liang-Jie Zhang
Lin Ma

Automated medication recommendation is a crucial task within the domain of artificial intelligence in healthcare, where recommender systems are supposed to deliver precise, personalized drug combinations tailored to the evolving health states of patients. Existing approaches often treat clinical records (e. g. , diagnoses, procedures) as isolated or unified entities, neglecting the inherent set-structured nature of medical data and the need to model interdependencies among clinical elements. To address the gap, we propose SSPNet, a novel end-to-end framework designed to process complete clinical record sets and directly generate optimal medication sets. SSPNet employs a set-based encoder to effectively capture and represent a patient's health condition from the electronic health records (EHRs), while a permutation-consistent decoder predicts the entire medication combination as a set. In addition, we introduce a novel personalized representation mechanism to capture the drugs previously used by individual patients. Extensive experiments on MIMIC-Ⅲ and MIMIC-Ⅳ data sets reveal that SSPNet surpasses existing state-of-the-art methods in the accuracy of medication recommendations.

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TIST Journal 2021 Journal Article

A GDPR-compliant Ecosystem for Speech Recognition with Transfer, Federated, and Evolutionary Learning

Di Jiang
Conghui Tan
Jinhua Peng
Chaotao Chen
Xueyang Wu
Weiwei Zhao
Yuanfeng Song
Yongxin Tong

Automatic Speech Recognition (ASR) is playing a vital role in a wide range of real-world applications. However, Commercial ASR solutions are typically “one-size-fits-all” products and clients are inevitably faced with the risk of severe performance degradation in field test. Meanwhile, with new data regulations such as the European Union’s General Data Protection Regulation (GDPR) coming into force, ASR vendors, which traditionally utilize the speech training data in a centralized approach, are becoming increasingly helpless to solve this problem, since accessing clients’ speech data is prohibited. Here, we show that by seamlessly integrating three machine learning paradigms (i.e., T ransfer learning, F ederated learning, and E volutionary learning (TFE)), we can successfully build a win-win ecosystem for ASR clients and vendors and solve all the aforementioned problems plaguing them. Through large-scale quantitative experiments, we show that with TFE, the clients can enjoy far better ASR solutions than the “one-size-fits-all” counterpart, and the vendors can exploit the abundance of clients’ data to effectively refine their own ASR products.

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TIST Journal 2021 Journal Article

Industrial Federated Topic Modeling

Di Jiang
Yongxin Tong
Yuanfeng Song
Xueyang Wu
Weiwei Zhao
Jinhua Peng
Rongzhong Lian
Qian Xu

Probabilistic topic modeling has been applied in a variety of industrial applications. Training a high-quality model usually requires a massive amount of data to provide comprehensive co-occurrence information for the model to learn. However, industrial data such as medical or financial records are often proprietary or sensitive, which precludes uploading to data centers. Hence, training topic models in industrial scenarios using conventional approaches faces a dilemma: A party (i.e., a company or institute) has to either tolerate data scarcity or sacrifice data privacy. In this article, we propose a framework named Industrial Federated Topic Modeling (iFTM), in which multiple parties collaboratively train a high-quality topic model by simultaneously alleviating data scarcity and maintaining immunity to privacy adversaries. iFTM is inspired by federated learning, supports two representative topic models (i.e., Latent Dirichlet Allocation and SentenceLDA) in industrial applications, and consists of novel techniques such as private Metropolis-Hastings, topic-wise normalization, and heterogeneous model integration. We conduct quantitative evaluations to verify the effectiveness of iFTM and deploy iFTM in two real-life applications to demonstrate its utility. Experimental results verify iFTM’s superiority over conventional topic modeling.

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