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Analytical queries defined on data warehouses are complex and use several join operations that are very costly, especially when run on very large data volumes. To improve response times, data warehouse administrators casually use indexing…

Databases · Computer Science 2008-09-12 Stéphane Azefack , Kamel Aouiche , Jérôme Darmont

This paper presents a hybrid approach to spatial indexing of two dimensional data. It sheds new light on the age old problem by thinking of the traditional algorithms as working with images. Inspiration is drawn from an analogous situation…

Data Structures and Algorithms · Computer Science 2016-11-17 Lukasz A. Machowski , Tshilidzi Marwala

We consider the problem of better modeling query-cluster interactions to facilitate query focused multi-document summarization (QFS). Due to the lack of training data, existing work relies heavily on retrieval-style methods for estimating…

Computation and Language · Computer Science 2020-04-08 Yumo Xu , Mirella Lapata

Online social networking techniques and large-scale multimedia systems are developing rapidly, which not only has brought great convenience to our daily life, but generated, collected, and stored large-scale multimedia data. This trend has…

Multimedia · Computer Science 2018-09-12 Chengyuan Zhang , Yunwu Lin , Lei Zhu , Zuping Zhang , Xinpan Yuan , Fang Huang

In this paper we present a profile-based approach to information filtering by an analysis of the content of text documents. The Wikipedia index database is created and used to automatically generate the user profile from the user document…

Information Retrieval · Computer Science 2008-05-08 A. V. Smirnov , A. A. Krizhanovsky

In this world, globalization has become a basic and most popular human trend. To globalize information, people are going to publish the documents in the internet. As a result, information volume of internet has become huge. To handle that…

Information Retrieval · Computer Science 2013-11-26 Sukanta Sinha , Rana Dattagupta , Debajyoti Mukhopadhyay

We investigate the scalable image classification problem with a large number of categories. Hierarchical visual data structures are helpful for improving the efficiency and performance of large-scale multi-class classification. We propose a…

Computer Vision and Pattern Recognition · Computer Science 2017-09-18 Yanyun Qu , Li Lin , Fumin Shen , Chang Lu , Yang Wu , Yuan Xie , Dacheng Tao

Keyword search against structured databases has become a popular topic of investigation, since many users find structured queries too hard to express, and enjoy the freedom of a ``Google-like'' query box into which search terms can be…

Databases · Computer Science 2009-09-15 Arnab Nandi , H V Jagadish

The importance of repetitions in music is well-known. In this paper, we study music repetitions in the context of effective and efficient automatic genre classification in large-scale music-databases. We aim at enhancing the access and…

Information Retrieval · Computer Science 2019-10-22 Andres Ferraro , Kjell Lemström

Videos are a commonly-used type of content in learning during Web search. Many e-learning platforms provide quality content, but sometimes educational videos are long and cover many topics. Humans are good in extracting important sections…

Computer Vision and Pattern Recognition · Computer Science 2020-10-27 Junaid Ahmed Ghauri , Sherzod Hakimov , Ralph Ewerth

This paper presents a novel method for efficient image retrieval, based on a simple and effective hashing of CNN features and the use of an indexing structure based on Bloom filters. These filters are used as gatekeepers for the database of…

Multimedia · Computer Science 2016-05-04 Andrea Salvi , Simone Ercoli , Marco Bertini , Alberto Del Bimbo

Huge amounts of cultural content have been digitised and are available through digital libraries and aggregators like Europeana.eu. However, it is not easy for a user to have an overall picture of what is available nor to find related…

Digital Libraries · Computer Science 2013-12-31 Shenghui Wang , Antoine Isaac , Valentine Charles , Rob Koopman , Anthi Agoropoulou , Titia van der Werf

Multi-index fusion has demonstrated impressive performances in retrieval task by integrating different visual representations in a unified framework. However, previous works mainly consider propagating similarities via neighbor structure,…

Computer Vision and Pattern Recognition · Computer Science 2017-09-28 Zhizhong Zhang , Yuan Xie , Wensheng Zhang , Qi Tian

Indexes provide a method to access data in databases quickly. It can improve the response speed of subsequent queries by building a complete index in advance. However, it also leads to a huge overhead of the continuous updating during…

Databases · Computer Science 2019-11-27 Gang Wu , Yidong Song , Guodong Zhao , Wei Sun , Donghong Han , Baiyou Qiao , Guoren Wang , Ye Yuan

Traditional information retrieval systems rely on keywords to index documents and queries. In such systems, documents are retrieved based on the number of shared keywords with the query. This lexical-focused retrieval leads to inaccurate…

Information Retrieval · Computer Science 2013-03-08 Fatiha Boubekeur , Wassila Azzoug

Query-based video situation detection (as opposed to manual or customized algorithms) is critical for diverse applications such as traffic monitoring, surveillance1 , and other types of environmental/infrastructure monitoring. Video…

Databases · Computer Science 2022-11-29 Hafsa Billah , Mayur Arora , Sharma Chakravarthy

Document retrieval for tasks such as search and retrieval-augmented generation typically involves datasets that are unstructured: free-form text without explicit internal structure in each document. However, documents can have a structured…

Information Retrieval · Computer Science 2025-04-18 Millicent Li , Tongfei Chen , Benjamin Van Durme , Patrick Xia

The explosive growth of multimodal data - spanning text, image, video, spatial, and relational modalities, coupled with the need for real-time semantic search and retrieval over these data - has outpaced the capabilities of existing…

Databases · Computer Science 2025-09-25 Jingyi Yang , Songsong Mo , Jiachen Shi , Zihao Yu , Kunhao Shi , Xuchen Ding , Gao Cong

Long-form video understanding presents significant challenges for interactive retrieval systems, as conventional methods struggle to process extensive video content efficiently. Existing approaches often rely on single models, inefficient…

Computer Vision and Pattern Recognition · Computer Science 2025-04-14 Huu-Loc Tran , Tinh-Anh Nguyen-Nhu , Huu-Phong Phan-Nguyen , Tien-Huy Nguyen , Nhat-Minh Nguyen-Dich , Anh Dao , Huy-Duc Do , Quan Nguyen , Hoang M. Le , Quang-Vinh Dinh

The emergence of large language models offers new possibilities for structured exploration of scientific knowledge. Rather than viewing scientific discovery as isolated ideas or content, we propose a structured approach that emphasizes the…

Artificial Intelligence · Computer Science 2025-04-15 Junlan Chen , Kexin Zhang , Daifeng Li , Yangyang Feng , Yuxuan Zhang , Bowen Deng