منابع مشابه
Effective Retrieval of Audio Information from Annotated Text Using Ontologies
To improve the accuracy in terms of precision and recall of an audio information retrieval system we have created a domainspecific ontology (a collection of key concepts and their interrelationships), as well as a novel, pruning algorithm. Taking into account the shortcomings of keyword-based techniques, we have opted to employ a concept-based technique utilizing this ontology. The key problem ...
متن کاملDocument retrieval and text retrieval
DR systems illustrate every variety of indexing language, request and document description, and search mechanism. Controlled languages (CLs) have been commonly used, across the range from only slightly restricted natural language (NL) to a carefully designed artificial language. With CLs professional indexing is required and professional searching is the norm. However automatic DR systems have ...
متن کاملMining Ontologies from Text
Ontologies have become an important means for structuring knowledge and building knowledge-intensive systems. For this purpose, efforts have been made to facilitate the ontology engineering process, in particular the acquisition of ontologies from domain texts. We present a general architecture for discovering conceptual structures and engineering ontologies. Based on our generic architecture w...
متن کاملTurning Text into Research Networks: Information Retrieval and Computational Ontologies in the Creation of Scientific Databases
BACKGROUND Web-based, free-text documents on science and technology have been increasing growing on the web. However, most of these documents are not immediately processable by computers slowing down the acquisition of useful information. Computational ontologies might represent a possible solution by enabling semantically machine readable data sets. But, the process of ontology creation, insta...
متن کاملImage retrieval using the combination of text-based and content-based algorithms
Image retrieval is an important research field which has received great attention in the last decades. In this paper, we present an approach for the image retrieval based on the combination of text-based and content-based features. For text-based features, keywords and for content-based features, color and texture features have been used. Query in this system contains some keywords and an input...
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ژورنال
عنوان ژورنال: The Knowledge Engineering Review
سال: 2002
ISSN: 0269-8889,1469-8005
DOI: 10.1017/s026988890200036x