Modern search engines face enormous performance challenges. The most popular ones process tens of thousands of queries per second and manage billions of documents. Besides being efficient in processing the queries, they have also to be effective in satisfying the information needs of the users. However, techniques that improve the quality of the results can also require longer processing time. Search engines have thus often to attain a compromise between effectiveness and efficiency when employing new query processing solutions. In this thesis, we propose three new solutions for improving the efficiency-effectiveness trade-offs in several different tasks of modern query processors, namely: query expansion, search results filtering, and top-...
Web search engines have to deal with a rapidly increasing amount of information, high query loads an...
Search engines are exceptionally important tools for accessing information in today’s world. In sati...
Web Search Engines (WSEs) are probably nowadays the most complex information systems since they need...
Search engines are exceptionally important tools for accessing information in today’s world. In sati...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
With the advent of Web, text information is being generated across the globe at an unfathomable rate...
Search engines are exceptionally important tools for accessing information in today’s world. In sati...
Web search engines have to deal with a rapidly increasing amount of information, high query loads an...
Search engines are exceptionally important tools for accessing information in today’s world. In sati...
Web Search Engines (WSEs) are probably nowadays the most complex information systems since they need...
Search engines are exceptionally important tools for accessing information in today’s world. In sati...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
Query Expansion (QE) techniques expand the user queries with additional terms, e.g., synonyms and ac...
With the advent of Web, text information is being generated across the globe at an unfathomable rate...
Search engines are exceptionally important tools for accessing information in today’s world. In sati...
Web search engines have to deal with a rapidly increasing amount of information, high query loads an...
Search engines are exceptionally important tools for accessing information in today’s world. In sati...
Web Search Engines (WSEs) are probably nowadays the most complex information systems since they need...