Filters








11,085 Hits in 6.8 sec

Effectiveness of Index Expressions [chapter]

F. A. Grootjen, T. P. van der Weide
2004 Lecture Notes in Computer Science  
In particular, this article tries to show that index expressions provide, beside their navigational properties, a good way to capture the semantics of inter-word relations and by doing so, form an adequate  ...  This article presents a retrieval experiment that compares the effectiveness of two unsupervised language models which generate terms that exceed the word boundary.  ...  In situations where the structure of index expressions can be exploited (as in query by navigation) they seem to form a beneficial alternative to term based systems, which is validated in [11] .  ... 
doi:10.1007/978-3-540-27779-8_15 fatcat:77x4oynhifa4rmv6vr3xotow3a

Automatic phrase indexing for document retrieval

J. Fagan
1987 Proceedings of the 10th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '87  
An automatic phrase indexing method based on the term discrimination model is described, and the results of retrieval experiments on five document collections are presented.  ...  Problems related to this non-syntactic phrase construction method are discussed, and some possible solutions are proposed that make use of information about the syntactic structure of document and query  ...  Heidorn and Karen Jenscn of IBM Thomas J. Watson Research Center for providing the facilities and background required to develop the syntax-based phrase indexing system.  ... 
doi:10.1145/42005.42016 dblp:conf/sigir/Fagan87 fatcat:meldkgwflbc4lcjqk7het7nrpu

Models for retrieval with probabilistic indexing

Norbert Fuhr
1989 Information Processing & Management  
In this model, the indexing weight of a descriptor in a document is an estimate of the probability of relevance of this document with respect to queries using this descriptor.  ...  First is the binary independence indexing @II) model, which is a generalized version of the Maron and Kuhns indexing model.  ...  For 11, these indexing weights were estimated in the same way as for the descriptors that were both in the document and in the query.  ... 
doi:10.1016/0306-4573(89)90091-5 fatcat:lkf75n35k5hkvl4uqxzrsfalgy

An automatic approach to weighted subject indexing-an empirical study in the biomedical domain

Kun Lu, Jin Mao
2015 Journal of the Association for Information Science and Technology  
On the other hand, the idea of probabilistic or weighted indexing was proposed a long time ago and has seen success in capturing uncertainties in the automatic indexing process.  ...  By uncovering the connections between MeSH descriptors and document text, we are able to derive the weights of MeSH descriptors manually assigned to documents.  ...  Dietmar Wolfram and Prof. June Abbas for their comments on an earlier version of the manuscript. We also appreciate the constructive comments from the two anonymo us reviewers.  ... 
doi:10.1002/asi.23290 fatcat:wyzeferk6rbhhjzheebur7gohu

Okapi-Chamfer matching for articulate object recognition

Hanning Zhou, Thomas Huang
2005 Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1  
The inverted index is a widely used way to effectively organize a collection of text documents. With the inverted index, only documents that contain query terms are accessed and used for matching.  ...  To evaluate the matching scores in the subset, we combined the modified Okapi weighting formula with the Chamfer distance.  ...  Chengxiang Zhai for proofreading the manuscript and inspiring discussions. We also thank Dennis Lin for his help in rendering the 3D mesh model of the hand.  ... 
doi:10.1109/iccv.2005.176 dblp:conf/iccv/ZhouH05 fatcat:cf2lgulrfzapthie4sgydvd2my

Bibliographic database access using free-text and controlled vocabulary: an evaluation

Jacques Savoy
2005 Information Processing & Management  
Retrieval is from a relatively large collection of bibliographic material written in French.  ...  This paper evaluates and compares the retrieval effectiveness of various search models, based on either automatic text-word indexing or on manually assigned controlled descriptors.  ...  Indexing and searching strategies In order to obtain a broader view of the relative merit of different retrieval models, and also to compare the retrieval performance of manual and automatic indexing procedures  ... 
doi:10.1016/j.ipm.2004.01.004 fatcat:5g22bzg7nndbrc4k2ameslvfyq

Mutual text-image queries

Timo Götzelmann, Pere-Pau Vázquez, Knut Hartmann, Tobias Germer, Andreas Nürnberger, Thomas Strothotte
2007 Proceedings of the 23rd Spring Conference on Computer Graphics - SCCG '07  
We propose a method for hierarchical content representations of text documents and views on 3D models.  ...  Based on these data structures, user interactions on texts and interactive 3D visualizations are transformed into queries to an information retrieval system.  ...  This system extracts exact matches between terms in the document and media descriptors and highlights those objects that are mentioned in the visible text portion in a 3D visualization.  ... 
doi:10.1145/2614348.2614368 dblp:conf/sccg/GotzelmannVHGNS07 fatcat:r2zym7jvbjekrinayrdy7elg3i

Symbol Descriptor Based on Shape Context and Vector Model of Information Retrieval

T-O Nguyen, S. Tabbone, O. Ramos Terrades
2008 2008 The Eighth IAPR International Workshop on Document Analysis Systems  
In this way, on the set of shape descriptors we build a visual vocabulary where each symbol is retrieved on visual words.  ...  To reduce the complexity of matching a symbol to a large set of candidates we use the popular vector model for information retrieval.  ...  Descriptors extracted from set B are used for building a visual vocabulary and each symbol of B will be then indexed as a document in the database.  ... 
doi:10.1109/das.2008.58 dblp:conf/das/NguyenTT08 fatcat:qa44za26cnbhjmiaq2xsg5qske

Generating User Profiles by Translating Content Queries to Concepts Using Thesaurus
ENGLISH

K. Nageswara Rao, V.G. Talwar
2006 DESIDOC Bulletin of Information Technology  
Generated user profiles in terms of weighted vector of descriptors could directly be used for recommending technical documents with relevance ranking for latest addition of documents.  ...  Studies conducted here are in the context of understanding and building content-based profiling system for technical documents, specially in the field of aerospace science and technology.  ...  QUERIES IN INFORMATION RETRIEVAL in a traditional information retrieval (IR) system, documents in the collection remain relatively static while dynamic queries are submitted to the retrieval system.  ... 
doi:10.14429/dbit.26.3.3686 fatcat:qtrcjfkmpnesrlqj4jzqqdtqda

The Impact of Online Indexing in Improving Arabic Information Retrieval Systems

Tahar Dilekh, Saber Benharzallah, Ali Behloul
2018 Informatica (Ljubljana, Tiskana izd.)  
Our findings show that the online indexing model successfully identifies the descriptors most relevant to the document.  ...  Finally, the paper proposes a solution to issues and deficiencies Arabic language processing suffers from, especially regarding corpora building and information retrieval evaluation systems.  ...  It retrieves all documents indexes (partial indexes) that created by the online semi-automatic indexing system, and merges them into a single general index.  ... 
doi:10.31449/inf.v42i4.2297 fatcat:elbuqblm45adjd7jwm6dhywwje

Toward a higher-level visual representation for content-based image retrieval

Ismail El sayad, Jean Martinet, Thierry Urruty, Chabane Djeraba
2010 Multimedia tools and applications  
The aim of the approach is to build a meaningful mid-level representation of images to be used later on for matching between a query image and other images in the desired database.  ...  The proposed approach is based on an analogy between content-based image retrieval and text retrieval.  ...  Related works Analogy between information retrieval and CBIR Text retrieval systems generally employ a number of standard steps in the processes of indexing and searching a text collection [2] .  ... 
doi:10.1007/s11042-010-0596-x fatcat:lkbyc2z6frfu7alofppr3ydyqi

Toward a higher-level visual representation for content-based image retrieval

Ismail El sayad, Jean Martinet, Thierry Urruty, Samir Amir, Chabane Djeraba
2010 Proceedings of the 8th International Conference on Advances in Mobile Computing and Multimedia - MoMM '10  
The aim of the approach is to build a meaningful mid-level representation of images to be used later on for matching between a query image and other images in the desired database.  ...  The proposed approach is based on an analogy between content-based image retrieval and text retrieval.  ...  Related works Analogy between information retrieval and CBIR Text retrieval systems generally employ a number of standard steps in the processes of indexing and searching a text collection [2] .  ... 
doi:10.1145/1971519.1971556 dblp:conf/momm/ElsayadMUAD10 fatcat:pvudf2m2qbb75cjp2u2rxucxkq

Classification and indexing languages in Poland (1974–1986). Pt. 1

Lucyna Anna Bielicka, Janusz Paciejewski, Eugeniusz Scibor
1987 Knowledge organization  
Indexing and information retrieval: Methods of indexing, selection of keywords in the text, relative indexing, linguistic indexing, search request formulation, weights.  ...  types of ILs and their linking, ILs used in Poland. 2.  ...  Weighted descriptors and relative indexing in a document retrieval sy stem model" , written by Kazimierz Charas and Czeslaw Danilowicz (34) and "Relative indexing on the basis of users ' profile" pre pared  ... 
doi:10.5771/0943-7444-1987-1-23 fatcat:6zu2wtevpjhqdp6n5m5lpcsojm

Information Retrieval: Textual Indexing Using an Oriented Object Database

Mohammed Erritali
2016 Indonesian Journal of Electrical Engineering and Computer Science  
Information Retrieval (IR) can be defined as the task of defining models and systems whose purpose is to facilitate access to a set of documents in electronic form (corpus) to allow a user to find the  ...  Most of the models of information retrieval use a specific data structure to index a corpus which is called "inverted file" or "reverse index".  ...  Indexation for Information Retrieval In information retrieval systems, the query and documents in the corpus are difficult to use in its raw state.  ... 
doi:10.11591/ijeecs.v2.i1.pp205-214 fatcat:xns3k2h4pjhghcdjgkgqovsb4m

Information Retrieval: A Comparative Study Of Textual Indexing Using An Oriented Object Database (Db4O) And The Inverted File

Mohammed Erritali
2015 Zenodo  
Information Retrieval (IR) can be defined as the task of defining models and systems whose purpose is to facilitate access to a set of documents in electronic form (corpus) to allow a user to find the  ...  Most of the models of information retrieval use a specific data structure to index a corpus which is called "inverted file" or "reverse index".  ...  In information retrieval systems, the query and documents in the corpus are difficult to use in its raw state.  ... 
doi:10.5281/zenodo.1337850 fatcat:swvqpn5vy5g3tcntdboad6qs2i
« Previous Showing results 1 — 15 out of 11,085 results