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Query expansion aims to mitigate the mismatch between the language used in a query and in a document. However, query expansion methods can suffer from introducing non-relevant information when expanding the query. To bridge this gap,…

Information Retrieval · Computer Science 2020-11-04 Zhi Zheng , Kai Hui , Ben He , Xianpei Han , Le Sun , Andrew Yates

Multimodal encoders have pushed the boundaries of visual document retrieval, matching textual query tokens directly to image patches and achieving state-of-the-art performance on public benchmarks. Recent models relying on this paradigm…

Computation and Language · Computer Science 2026-04-08 Omri Uzan , Asaf Yehudai , Roi pony , Eyal Shnarch , Ariel Gera

Finding errors in machine learning applications requires a thorough exploration of their behavior over data. Existing approaches used by practitioners are often ad-hoc and lack the abstractions needed to scale this process. We present…

Databases · Computer Science 2024-10-17 Aaditya Naik , Adam Stein , Yinjun Wu , Mayur Naik , Eric Wong

Large Language Models (LLMs) have exhibited impressive generation capabilities, but they suffer from hallucinations when solely relying on their internal knowledge, especially when answering questions that require less commonly known…

Computation and Language · Computer Science 2023-11-01 Wenting Zhao , Ye Liu , Tong Niu , Yao Wan , Philip S. Yu , Shafiq Joty , Yingbo Zhou , Semih Yavuz

Knowledge Base Question Answering (KBQA) systems have the goal of answering complex natural language questions by reasoning over relevant facts retrieved from Knowledge Bases (KB). One of the major challenges faced by these systems is their…

Computation and Language · Computer Science 2022-03-22 Nithish Kannen , Udit Sharma , Sumit Neelam , Dinesh Khandelwal , Shajith Ikbal , Hima Karanam , L Venkata Subramaniam

Query sensitive summarization aims at providing the users with the summary of the contents of single or multiple web pages based on the search query. This paper proposes a novel idea of generating a comparative summary from a set of URLs…

Information Retrieval · Computer Science 2012-01-12 P. Chitra , R. Baskaran , K. Sarukesi

A focused crawler traverses the web selecting out relevant pages to a predefined topic and neglecting those out of concern. While surfing the internet it is difficult to deal with irrelevant pages and to predict which links lead to quality…

Information Retrieval · Computer Science 2009-06-30 Anshika Pal , Deepak Singh Tomar , S. C. Shrivastava

RDF query optimization is a challenging problem. Although considerable factors and their impacts on query efficiency have been investigated, this problem still needs further investigation. We identify that decomposing query into a series of…

Databases · Computer Science 2015-10-28 Lei Gai , Wei Chen , Tengjiao Wang

Deep Linking is the process of referring to a specific piece of web content. Although users can browse their files in desktop environments, they are unable to directly traverse deeper into their content using deep links. In order to solve…

Human-Computer Interaction · Computer Science 2018-08-06 Markus Schröder , Christian Jilek , Andreas Dengel

In this study, we address the problem of answering queries over a peer-to-peer system of taxonomy-based sources. A taxonomy states subsumption relationships between negation-free DNF formulas on terms and negation-free conjunctions of…

Databases · Computer Science 2007-09-20 Carlo Meghini , Yannis Tzitzikas , Anastasia Analyti

The proposed methodology is procedural i.e. it follows finite number of steps that extracts relevant documents according to users query. It is based on principles of Data Mining for analyzing web data. Data Mining first adapts integration…

Information Retrieval · Computer Science 2017-03-23 Vishal Jain , Dr. Mayank Singh

Diffusion Transformers (DiTs) have emerged as a highly scalable and effective backbone for image generation, outperforming U-Net architectures in both scalability and performance. However, their real-world deployment remains challenging due…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Kaicheng Yang , Kaisen Yang , Baiting Wu , Xun Zhang , Qianrui Yang , Haotong Qin , He Zhang , Yulun Zhang

The quality of machine learning models depends heavily on their training data. Selecting high-quality, diverse training sets for large language models (LLMs) is a difficult task, due to the lack of cheap and reliable quality metrics. While…

Machine Learning · Computer Science 2026-01-30 Robert Istvan Busa-Fekete , Julian Zimmert , Anne Xiangyi Zheng , Claudio Gentile , Andras Gyorgy

Temporal Knowledge Graphs (TKGs) represent dynamic facts as timestamped relations between entities. TKG completion involves forecasting missing or future links, requiring models to reason over time-evolving structure. While LLMs show…

Machine Learning · Computer Science 2025-05-26 Ömer Faruk Akgül , Feiyu Zhu , Yuxin Yang , Rajgopal Kannan , Viktor Prasanna

Enlarging the context window of large language models (LLMs) has become a crucial research area, particularly for applications involving extremely long texts. In this work, we propose a novel training-free framework for processing long…

Computation and Language · Computer Science 2024-10-15 Zihan Zhou , Chong Li , Xinyi Chen , Shuo Wang , Yu Chao , Zhili Li , Haoyu Wang , Rongqiao An , Qi Shi , Zhixing Tan , Xu Han , Xiaodong Shi , Zhiyuan Liu , Maosong Sun

Large language models (LLMs) have exhibited remarkable performance on various natural language processing (NLP) tasks, especially for question answering. However, in the face of problems beyond the scope of knowledge, these LLMs tend to…

Computation and Language · Computer Science 2024-01-02 Chaojie Wang , Yishi Xu , Zhong Peng , Chenxi Zhang , Bo Chen , Xinrun Wang , Lei Feng , Bo An

Question answering over mixed sources, like text and tables, has been advanced by verbalizing all contents and encoding it with a language model. A prominent case of such heterogeneous data is personal information: user devices log vast…

Computation and Language · Computer Science 2025-05-20 Philipp Christmann , Gerhard Weikum

Question Answering (QA) systems provide easy access to the vast amount of knowledge without having to know the underlying complex structure of the knowledge. The research community has provided ad hoc solutions to the key QA tasks,…

Computation and Language · Computer Science 2019-06-11 Somayeh Asadifar , Mohsen Kahani , Saeedeh Shekarpour

A temporal graph can be considered as a stream of links, each of which represents an interaction between two nodes at a certain time. On temporal graphs, link prediction is a common task, which aims to answer whether the query link is true…

Artificial Intelligence · Computer Science 2024-02-13 Bingqing Liu , Xikun Huang

According to common relevance-judgments regimes, such as TREC's, a document can be deemed relevant to a query even if it contains a very short passage of text with pertinent information. This fact has motivated work on passage-based…

Information Retrieval · Computer Science 2019-06-06 Eilon Sheetrit , Anna Shtok , Oren Kurland