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Joint extraction of entities and relations from unstructured texts is a crucial task in information extraction. Recent methods achieve considerable performance but still suffer from some inherent limitations, such as redundancy of relation…

计算与语言 · 计算机科学 2021-06-21 Hengyi Zheng , Rui Wen , Xi Chen , Yifan Yang , Yunyan Zhang , Ziheng Zhang , Ningyu Zhang , Bin Qin , Ming Xu , Yefeng Zheng

Forecasting future links is a central task in temporal graph (TG) reasoning, requiring models to leverage historical interactions to predict upcoming ones. Traditional neural approaches, such as temporal graph neural networks, achieve…

Offline reinforcement learning (RL) holds great promise for deriving optimal policies from observational data, but challenges related to interpretability and evaluation limit its practical use in safety-critical domains. Interpretability is…

机器学习 · 计算机科学 2025-07-24 Anton Matsson , Yaochen Rao , Heather J. Litman , Fredrik D. Johansson

Despite great success has been achieved in activity analysis, it still has many challenges. Most existing work in activity recognition pay more attention to design efficient architecture or video sampling strategy. However, due to the…

计算机视觉与模式识别 · 计算机科学 2019-08-28 Jingran Zhang , Fumin Shen , Xing Xu , Heng Tao Shen

In this paper, we introduce the context-aware probabilistic temporal logic (CAPTL) that provides an intuitive way to formalize system requirements by a set of PCTL objectives with a context-based priority structure. We formally present the…

计算机科学中的逻辑 · 计算机科学 2020-07-14 Mahmoud Elfar , Yu Wang , Miroslav Pajic

The current leading paradigm for temporal information extraction from text consists of three phases: (1) recognition of events and temporal expressions, (2) recognition of temporal relations among them, and (3) time-line construction from…

计算与语言 · 计算机科学 2023-12-01 Artuur Leeuwenberg , Marie-Francine Moens

The growing availability and importance of time series data across various domains, including environmental science, epidemiology, and economics, has led to an increasing need for time-series causal discovery methods that can identify the…

机器学习 · 计算机科学 2024-04-03 Omar Faruque , Sahara Ali , Xue Zheng , Jianwu Wang

We evaluate the ability of large language models (LLMs) to infer causal relations from natural language. Compared to traditional natural language processing and deep learning techniques, LLMs show competitive performance in a benchmark of…

人工智能 · 计算机科学 2023-12-25 Alessandro Antonucci , Gregorio Piqué , Marco Zaffalon

Stemming from traditional knowledge graphs (KGs), hyper-relational KGs (HKGs) provide additional key-value pairs (i.e., qualifiers) for each KG fact that help to better restrict the fact validity. In recent years, there has been an…

人工智能 · 计算机科学 2024-10-07 Zifeng Ding , Jingcheng Wu , Jingpei Wu , Yan Xia , Volker Tresp

Reasoning future unknowable facts on temporal knowledge graphs (TKGs) is a challenging task, holding significant academic and practical values for various fields. Existing studies exploring explainable reasoning concentrate on modeling…

人工智能 · 计算机科学 2024-12-24 Wei Chen , Yuting Wu , Shuhan Wu , Zhiyu Zhang , Mengqi Liao , Youfang Lin , Huaiyu Wan

Sentence-level relation extraction aims to identify the relation between two entities for a given sentence. The existing works mostly focus on obtaining a better entity representation and adopting a multi-label classifier for relation…

计算与语言 · 计算机科学 2023-04-12 Jiewen Zheng , Ze Chen

Inter-sentence relation extraction deals with a number of complex semantic relationships in documents, which require local, non-local, syntactic and semantic dependencies. Existing methods do not fully exploit such dependencies. We present…

计算与语言 · 计算机科学 2019-06-12 Sunil Kumar Sahu , Fenia Christopoulou , Makoto Miwa , Sophia Ananiadou

Electronic health records (EHRs) are long, noisy, and often redundant, posing a major challenge for the clinicians who must navigate them. Large language models (LLMs) offer a promising solution for extracting and reasoning over this…

While large language models (LLMs) have demonstrated remarkable reasoning capabilities, they are not without their flaws and inaccuracies. Recent studies have introduced various methods to mitigate these limitations. Temporal reasoning…

计算与语言 · 计算机科学 2024-10-10 Siheng Xiong , Ali Payani , Ramana Kompella , Faramarz Fekri

Extracting temporal relations between events and time expressions has many applications such as constructing event timelines and time-related question answering. It is a challenging problem which requires syntactic and semantic information…

计算与语言 · 计算机科学 2020-10-06 Hayley Ross , Jonathon Cai , Bonan Min

Relation extraction is the task of identifying predefined relationship between entities, and plays an essential role in information extraction, knowledge base construction, question answering and so on. Most existing relation extractors…

计算与语言 · 计算机科学 2018-11-12 Liwei Chen , Yansong Feng , Songfang Huang , Bingfeng Luo , Dongyan Zhao

Recent advances in large language models (LLMs) have shown potential in clinical text summarization, but their ability to handle long patient trajectories with multi-modal data spread across time remains underexplored. This study…

FDA drug labels are rich sources of information about drugs and drug-disease relations, but their complexity makes them challenging texts to analyze in isolation. To overcome this, we situate these labels in two health knowledge graphs: one…

计算与语言 · 计算机科学 2019-04-02 Bruno Godefroy , Christopher Potts

Causal inference is at the heart of empirical research in natural and social sciences and is critical for scientific discovery and informed decision making. The gold standard in causal inference is performing randomized controlled trials;…

数据库 · 计算机科学 2020-04-09 Babak Salimi , Harsh Parikh , Moe Kayali , Sudeepa Roy , Lise Getoor , Dan Suciu

Question answering in temporal knowledge graphs requires retrieval that is both time-consistent and efficient. Existing RAG methods are largely semantic and typically neglect explicit temporal constraints, which leads to time-inconsistent…

信息检索 · 计算机科学 2025-10-21 Zulun Zhu , Haoyu Liu , Mengke He , Siqiang Luo