-
Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998)
0.08
0.083886914 = product of:
0.16777383 = sum of:
0.16777383 = sum of:
0.11964179 = weight(_text_:assessment in 1319) [ClassicSimilarity], result of:
0.11964179 = score(doc=1319,freq=2.0), product of:
0.2801951 = queryWeight, product of:
5.52102 = idf(docFreq=480, maxDocs=44218)
0.050750602 = queryNorm
0.4269946 = fieldWeight in 1319, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.52102 = idf(docFreq=480, maxDocs=44218)
0.0546875 = fieldNorm(doc=1319)
0.048132043 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
0.048132043 = score(doc=1319,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.2708308 = fieldWeight in 1319, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1319)
0.5 = coord(1/2)
- Abstract
- Keyword based querying has been an immediate and efficient way to specify and retrieve related information that the user inquired. However, conventional document ranking based on an automatic assessment of document relevance to the query may not be the best approach when little information is given. Proposes an idea to integrate 2 existing techniques, query expansion and relevance feedback to achieve a concept-based information search for the Web
- Date
- 1. 8.1996 22:08:06
-
Jiang, Y.; Zhang, X.; Tang, Y.; Nie, R.: Feature-based approaches to semantic similarity assessment of concepts using Wikipedia (2015)
0.04
0.04272921 = product of:
0.08545842 = sum of:
0.08545842 = product of:
0.17091684 = sum of:
0.17091684 = weight(_text_:assessment in 2682) [ClassicSimilarity], result of:
0.17091684 = score(doc=2682,freq=8.0), product of:
0.2801951 = queryWeight, product of:
5.52102 = idf(docFreq=480, maxDocs=44218)
0.050750602 = queryNorm
0.60999227 = fieldWeight in 2682, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
5.52102 = idf(docFreq=480, maxDocs=44218)
0.0390625 = fieldNorm(doc=2682)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Semantic similarity assessment between concepts is an important task in many language related applications. In the past, several approaches to assess similarity by evaluating the knowledge modeled in an (or multiple) ontology (or ontologies) have been proposed. However, there are some limitations such as the facts of relying on predefined ontologies and fitting non-dynamic domains in the existing measures. Wikipedia provides a very large domain-independent encyclopedic repository and semantic network for computing semantic similarity of concepts with more coverage than usual ontologies. In this paper, we propose some novel feature based similarity assessment methods that are fully dependent on Wikipedia and can avoid most of the limitations and drawbacks introduced above. To implement similarity assessment based on feature by making use of Wikipedia, firstly a formal representation of Wikipedia concepts is presented. We then give a framework for feature based similarity based on the formal representation of Wikipedia concepts. Lastly, we investigate several feature based approaches to semantic similarity measures resulting from instantiations of the framework. The evaluation, based on several widely used benchmarks and a benchmark developed in ourselves, sustains the intuitions with respect to human judgements. Overall, several methods proposed in this paper have good human correlation and constitute some effective ways of determining similarity between Wikipedia concepts.
-
Gödert, W.: Inhaltliche Dokumenterschließung, Information Retrieval und Navigation in Informationsräumen (1995)
0.03
0.034183368 = product of:
0.068366736 = sum of:
0.068366736 = product of:
0.13673347 = sum of:
0.13673347 = weight(_text_:assessment in 4438) [ClassicSimilarity], result of:
0.13673347 = score(doc=4438,freq=2.0), product of:
0.2801951 = queryWeight, product of:
5.52102 = idf(docFreq=480, maxDocs=44218)
0.050750602 = queryNorm
0.4879938 = fieldWeight in 4438, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.52102 = idf(docFreq=480, maxDocs=44218)
0.0625 = fieldNorm(doc=4438)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Examines the advantages and disadvantages of precoordinated, postcoordinated and automatic indexing with regard to existing information storage systems, such as card catalogues, OPACs, CR-ROM databases, and online databases. Presents a general model of document content representation and concludes that the library profession needs to address the development of databank design models, relevance feedback methods and automatic indexing assessment methods, to make indexing more effective
-
Boyack, K.W.; Wylie,B.N.; Davidson, G.S.: Information Visualization, Human-Computer Interaction, and Cognitive Psychology : Domain Visualizations (2002)
0.02
0.024310352 = product of:
0.048620705 = sum of:
0.048620705 = product of:
0.09724141 = sum of:
0.09724141 = weight(_text_:22 in 1352) [ClassicSimilarity], result of:
0.09724141 = score(doc=1352,freq=4.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.54716086 = fieldWeight in 1352, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=1352)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 2.2003 17:25:39
22. 2.2003 18:17:40
-
Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
0.02
0.024066022 = product of:
0.048132043 = sum of:
0.048132043 = product of:
0.09626409 = sum of:
0.09626409 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
0.09626409 = score(doc=2134,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.5416616 = fieldWeight in 2134, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=2134)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 30. 3.2001 13:32:22
-
Buccio, E. Di; Melucci, M.; Moro, F.: Detecting verbose queries and improving information retrieval (2014)
0.02
0.021364605 = product of:
0.04272921 = sum of:
0.04272921 = product of:
0.08545842 = sum of:
0.08545842 = weight(_text_:assessment in 2695) [ClassicSimilarity], result of:
0.08545842 = score(doc=2695,freq=2.0), product of:
0.2801951 = queryWeight, product of:
5.52102 = idf(docFreq=480, maxDocs=44218)
0.050750602 = queryNorm
0.30499613 = fieldWeight in 2695, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.52102 = idf(docFreq=480, maxDocs=44218)
0.0390625 = fieldNorm(doc=2695)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Although most of the queries submitted to search engines are composed of a few keywords and have a length that ranges from three to six words, more than 15% of the total volume of the queries are verbose, introduce ambiguity and cause topic drifts. We consider verbosity a different property of queries from length since a verbose query is not necessarily long, it might be succinct and a short query might be verbose. This paper proposes a methodology to automatically detect verbose queries and conditionally modify queries. The methodology proposed in this paper exploits state-of-the-art classification algorithms, combines concepts from a large linguistic database and uses a topic gisting algorithm we designed for verbose query modification purposes. Our experimental results have been obtained using the TREC Robust track collection, thirty topics classified by difficulty degree, four queries per topic classified by verbosity and length, and human assessment of query verbosity. Our results suggest that the methodology for query modification conditioned to query verbosity detection and topic gisting is significantly effective and that query modification should be refined when topic difficulty and query verbosity are considered since these two properties interact and query verbosity is not straightforwardly related to query length.
-
Olmos, R.; Jorge-Botana, G.; Luzón, J.M.; Martín-Cordero, J.I.; León, J.A.: Transforming LSA space dimensions into a rubric for an automatic assessment and feedback system (2016)
0.02
0.021364605 = product of:
0.04272921 = sum of:
0.04272921 = product of:
0.08545842 = sum of:
0.08545842 = weight(_text_:assessment in 2878) [ClassicSimilarity], result of:
0.08545842 = score(doc=2878,freq=2.0), product of:
0.2801951 = queryWeight, product of:
5.52102 = idf(docFreq=480, maxDocs=44218)
0.050750602 = queryNorm
0.30499613 = fieldWeight in 2878, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.52102 = idf(docFreq=480, maxDocs=44218)
0.0390625 = fieldNorm(doc=2878)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Xu, B.; Lin, H.; Lin, Y.: Assessment of learning to rank methods for query expansion (2016)
0.02
0.021364605 = product of:
0.04272921 = sum of:
0.04272921 = product of:
0.08545842 = sum of:
0.08545842 = weight(_text_:assessment in 2929) [ClassicSimilarity], result of:
0.08545842 = score(doc=2929,freq=2.0), product of:
0.2801951 = queryWeight, product of:
5.52102 = idf(docFreq=480, maxDocs=44218)
0.050750602 = queryNorm
0.30499613 = fieldWeight in 2929, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.52102 = idf(docFreq=480, maxDocs=44218)
0.0390625 = fieldNorm(doc=2929)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Rekabsaz, N. et al.: Toward optimized multimodal concept indexing (2016)
0.02
0.017190015 = product of:
0.03438003 = sum of:
0.03438003 = product of:
0.06876006 = sum of:
0.06876006 = weight(_text_:22 in 2751) [ClassicSimilarity], result of:
0.06876006 = score(doc=2751,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.38690117 = fieldWeight in 2751, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=2751)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 1. 2.2016 18:25:22
-
Kozikowski, P. et al.: Support of part-whole relations in query answering (2016)
0.02
0.017190015 = product of:
0.03438003 = sum of:
0.03438003 = product of:
0.06876006 = sum of:
0.06876006 = weight(_text_:22 in 2754) [ClassicSimilarity], result of:
0.06876006 = score(doc=2754,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.38690117 = fieldWeight in 2754, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=2754)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 1. 2.2016 18:25:22
-
Marx, E. et al.: Exploring term networks for semantic search over RDF knowledge graphs (2016)
0.02
0.017190015 = product of:
0.03438003 = sum of:
0.03438003 = product of:
0.06876006 = sum of:
0.06876006 = weight(_text_:22 in 3279) [ClassicSimilarity], result of:
0.06876006 = score(doc=3279,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.38690117 = fieldWeight in 3279, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3279)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Metadata and semantics research: 10th International Conference, MTSR 2016, Göttingen, Germany, November 22-25, 2016, Proceedings. Eds.: E. Garoufallou
-
Kopácsi, S. et al.: Development of a classification server to support metadata harmonization in a long term preservation system (2016)
0.02
0.017190015 = product of:
0.03438003 = sum of:
0.03438003 = product of:
0.06876006 = sum of:
0.06876006 = weight(_text_:22 in 3280) [ClassicSimilarity], result of:
0.06876006 = score(doc=3280,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.38690117 = fieldWeight in 3280, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3280)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Metadata and semantics research: 10th International Conference, MTSR 2016, Göttingen, Germany, November 22-25, 2016, Proceedings. Eds.: E. Garoufallou
-
Koopman, B.; Zuccon, G.; Bruza, P.; Sitbon, L.; Lawley, M.: Information retrieval as semantic inference : a graph Inference model applied to medical search (2016)
0.02
0.017091684 = product of:
0.034183368 = sum of:
0.034183368 = product of:
0.068366736 = sum of:
0.068366736 = weight(_text_:assessment in 3260) [ClassicSimilarity], result of:
0.068366736 = score(doc=3260,freq=2.0), product of:
0.2801951 = queryWeight, product of:
5.52102 = idf(docFreq=480, maxDocs=44218)
0.050750602 = queryNorm
0.2439969 = fieldWeight in 3260, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.52102 = idf(docFreq=480, maxDocs=44218)
0.03125 = fieldNorm(doc=3260)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This paper presents a Graph Inference retrieval model that integrates structured knowledge resources, statistical information retrieval methods and inference in a unified framework. Key components of the model are a graph-based representation of the corpus and retrieval driven by an inference mechanism achieved as a traversal over the graph. The model is proposed to tackle the semantic gap problem-the mismatch between the raw data and the way a human being interprets it. We break down the semantic gap problem into five core issues, each requiring a specific type of inference in order to be overcome. Our model and evaluation is applied to the medical domain because search within this domain is particularly challenging and, as we show, often requires inference. In addition, this domain features both structured knowledge resources as well as unstructured text. Our evaluation shows that inference can be effective, retrieving many new relevant documents that are not retrieved by state-of-the-art information retrieval models. We show that many retrieved documents were not pooled by keyword-based search methods, prompting us to perform additional relevance assessment on these new documents. A third of the newly retrieved documents judged were found to be relevant. Our analysis provides a thorough understanding of when and how to apply inference for retrieval, including a categorisation of queries according to the effect of inference. The inference mechanism promoted recall by retrieving new relevant documents not found by previous keyword-based approaches. In addition, it promoted precision by an effective reranking of documents. When inference is used, performance gains can generally be expected on hard queries. However, inference should not be applied universally: for easy, unambiguous queries and queries with few relevant documents, inference did adversely affect effectiveness. These conclusions reflect the fact that for retrieval as inference to be effective, a careful balancing act is involved. Finally, although the Graph Inference model is developed and applied to medical search, it is a general retrieval model applicable to other areas such as web search, where an emerging research trend is to utilise structured knowledge resources for more effective semantic search.
-
Sacco, G.M.: Dynamic taxonomies and guided searches (2006)
0.02
0.017017247 = product of:
0.034034494 = sum of:
0.034034494 = product of:
0.06806899 = sum of:
0.06806899 = weight(_text_:22 in 5295) [ClassicSimilarity], result of:
0.06806899 = score(doc=5295,freq=4.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.38301262 = fieldWeight in 5295, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=5295)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 17:56:22
-
Efthimiadis, E.N.: End-users' understanding of thesaural knowledge structures in interactive query expansion (1994)
0.01
0.0137520125 = product of:
0.027504025 = sum of:
0.027504025 = product of:
0.05500805 = sum of:
0.05500805 = weight(_text_:22 in 5693) [ClassicSimilarity], result of:
0.05500805 = score(doc=5693,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.30952093 = fieldWeight in 5693, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=5693)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 30. 3.2001 13:35:22
-
Fieldhouse, M.; Hancock-Beaulieu, M.: ¬The design of a graphical user interface for a highly interactive information retrieval system (1996)
0.01
0.012033011 = product of:
0.024066022 = sum of:
0.024066022 = product of:
0.048132043 = sum of:
0.048132043 = weight(_text_:22 in 6958) [ClassicSimilarity], result of:
0.048132043 = score(doc=6958,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.2708308 = fieldWeight in 6958, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=6958)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Faaborg, A.; Lagoze, C.: Semantic browsing (2003)
0.01
0.012033011 = product of:
0.024066022 = sum of:
0.024066022 = product of:
0.048132043 = sum of:
0.048132043 = weight(_text_:22 in 1026) [ClassicSimilarity], result of:
0.048132043 = score(doc=1026,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.2708308 = fieldWeight in 1026, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1026)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Research and advanced technology for digital libraries : 7th European Conference, proceedings / ECDL 2003, Trondheim, Norway, August 17-22, 2003
-
Knorz, G.; Rein, B.: Semantische Suche in einer Hochschulontologie (2005)
0.01
0.012033011 = product of:
0.024066022 = sum of:
0.024066022 = product of:
0.048132043 = sum of:
0.048132043 = weight(_text_:22 in 1852) [ClassicSimilarity], result of:
0.048132043 = score(doc=1852,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.2708308 = fieldWeight in 1852, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1852)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 11. 2.2011 18:22:58
-
Knorz, G.; Rein, B.: Semantische Suche in einer Hochschulontologie : Ontologie-basiertes Information-Filtering und -Retrieval mit relationalen Datenbanken (2005)
0.01
0.012033011 = product of:
0.024066022 = sum of:
0.024066022 = product of:
0.048132043 = sum of:
0.048132043 = weight(_text_:22 in 4324) [ClassicSimilarity], result of:
0.048132043 = score(doc=4324,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.2708308 = fieldWeight in 4324, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=4324)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 11. 2.2011 18:22:25
-
Salaba, A.; Zeng, M.L.: Extending the "Explore" user task beyond subject authority data into the linked data sphere (2014)
0.01
0.012033011 = product of:
0.024066022 = sum of:
0.024066022 = product of:
0.048132043 = sum of:
0.048132043 = weight(_text_:22 in 1465) [ClassicSimilarity], result of:
0.048132043 = score(doc=1465,freq=2.0), product of:
0.17771997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050750602 = queryNorm
0.2708308 = fieldWeight in 1465, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1465)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Knowledge organization in the 21st century: between historical patterns and future prospects. Proceedings of the Thirteenth International ISKO Conference 19-22 May 2014, Kraków, Poland. Ed.: Wieslaw Babik
