Searching documents with semantically related keyphrases

Download
index.pdf
2010
Aygül, İbrahim
Show full item record
151
views
82
downloads
In this thesis, we developed SemKPSearch which is a tool for searching documents by the keyphrases that are semantically related with the given query phrase. By relating the keyphrases semantically, we aim to provide users an extended search and browsing capability over a document collection and to increase the number of related results returned for a keyphrase query. Keyphrases provide a brief summary of the content of documents. They can be either author assigned or automatically extracted from the documents. SemKPSearch uses SemKPIndexes which are generated with the keyphrases of the documents. SemKPIndex is a keyphrase index extended with a keyphrase to keyphrase index which stores the semantic relation score between the keyphrases in the document collection. Semantic relation score between keyphrases is calculated using a metric which considers the similarity score between words of the keyphrases. The semantic similarity score between two words is determined with the help of two word-to-word semantic similarity metrics, namely the metric of Wu&Palmer and the metric of Li et al. SemKPSearch is evaluated by the human evaluators which are all computer engineers. For the evaluation, in addition to the author assigned keyphrases, the keyphrases automatically extracted by employing the state-of-the-art algorithm KEA are used to create keyphrase indexes.
Computer engineering., Electronic information resource searching.
http://etd.lib.metu.edu.tr/upload/12612771/index.pdf
https://hdl.handle.net/11511/20223
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Selective word encoding for effective text representation
Ozkan, Savas; Ozkan, Akin (The Scientific and Technological Research Council of Turkey, 2019-01-01)
Determining the category of a text document from its semantic content is highly motivated in the literature and it has been extensively studied in various applications. Also, the compact representation of the text is a fundamental step in achieving precise results for the applications and the studies are generously concentrated to improve its performance. In particular, the studies which exploit the aggregation of word-level representations are the mainstream techniques used in the problem. In this paper, w...
Semantic service discovery with heuristic relevance calculation
Özyönüm, Müge; Doğru, Ali Hikmet; Department of Computer Engineering (2010)
In this thesis, a semantically aided web service and restful service search mechanism is presented that makes use of an ontology. The mechanism relates method names, input and output parameters for ontology guided matches and offers results with varying relevance corresponding to the matching degree. The mechanism is demonstrated using an experimental domain that is tourism and travel. An ontology is created to support a set of web services that exist in this domain.
Natural language query processing in ontology based multimedia databases
Aygül, Filiz Alaca; Çiçekli, Fehime Nihan; Department of Computer Engineering (2010)
In this thesis a natural language query interface is developed for semantic and spatio-temporal querying of MPEG-7 based domain ontologies. The underlying ontology is created by attaching domain ontologies to the core Rhizomik MPEG-7 ontology. The user can pose concept, complex concept (objects connected with an “AND” or “OR” connector), spatial (left, right . . . ), temporal (before, after, at least 10 minutes before, 5 minutes after . . . ), object trajectory and directional trajectory (east, west, southe...
Verification of Modular Diagnosability With Local Specifications for Discrete-Event Systems
Schmidt, Klaus Verner (Institute of Electrical and Electronics Engineers (IEEE), 2013-09-01)
In this paper, we study the diagnosability verification for modular discrete-event systems (DESs), i.e., DESs that are composed of multiple components. We focus on a particular modular architecture, where each fault in the system must be uniquely identified by the modular component where it occurs and solely based on event observations of that component. Hence, all diagnostic computations for faults to be detected in this architecture can be performed locally on the respective modular component, and the obt...
Automatic Definition of Optimal Default Parameters of Models: Image Matting Application
Ravve, Elena V.; Volkovich, Zeev; Weber, Gerhard Wilhelm (2015-09-24)
As a general rule, each user must provide the tool applied with particular values of its input parameters. An inexperienced user may hardly figure out their values and the tool developer must define the default values in order to help her/him. We present an approach to solve the problem with the help of multi-criteria optimization that is new in this formulation. We demonstrate our approach in closer details using an example from the automatic definition of optimal default parameters for real-time merging o...
Citation Formats
İ. Aygül, “Searching documents with semantically related keyphrases,” M.S. - Master of Science, Middle East Technical University, 2010.
METU IIS - Integrated Information Service open@metu.edu.tr