Multilingual Information Retrieval: From Research To by Carol Peters, Martin Braschler, Paul Clough PDF

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By Carol Peters, Martin Braschler, Paul Clough

ISBN-10: 3642230075

ISBN-13: 9783642230073

We reside in a multilingual international and the range in languages that are used to have interaction with details entry platforms has generated a wide selection of demanding situations to be addressed by way of desktop and knowledge scientists. The transforming into volume of non-English details available globally and the elevated around the world publicity of companies additionally necessitates the difference of data Retrieval (IR) how you can new, multilingual settings.

Peters, Braschler and Clough current a complete description of the applied sciences considering designing and constructing structures for Multilingual info Retrieval (MLIR). they supply readers with huge insurance of many of the matters fascinated by growing structures to make obtainable digitally kept fabrics whatever the language(s) they're written in. info on Cross-Language info Retrieval (CLIR) also are coated that aid readers to appreciate find out how to boost retrieval structures that move language barriers. Their paintings is split into six chapters and accompanies the reader step by step in the course of the numerous levels interested by construction, utilizing and comparing MLIR structures. The booklet concludes with a few examples of modern functions that utilise MLIR applied sciences. the various options defined have lately began to appear in advertisement seek platforms, whereas others have the capability to join destiny incarnations.

The publication is meant for graduate scholars, students, and practitioners with a simple knowing of classical textual content retrieval equipment. It bargains directions and knowledge on all facets that have to be considered while development MLIR structures, whereas averting too many ‘hands-on information’ that may quickly turn into out of date. therefore it bridges the distance among the fabric coated by means of lots of the classical IR textbooks and the unconventional necessities relating to the purchase and dissemination of knowledge in no matter what language it truly is stored.

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Extra resources for Multilingual Information Retrieval: From Research To Practice

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Although there has been an enormous improvement in MT systems in the last decade, performance levels can vary greatly and are still a long way from the style and accuracy achieved by a human translator. As has already been stated, for many languages there are still no good MT systems available. Finally, we need to remember that a MLIR/CLIR system is never an end in itself but a component within a particular information seeking application – and the application is most probably multimedia. Thus much more research is needed on how to develop/engineer commercially viable search systems that meet the typical requirements of the average enterprise user: • Search system must run on a single ‘off-the-shelf’ server; • System must be easily integrated into the client’s platform; • The response times even for complex queries must be fast (<2 s); • Scalability problems must be resolved (CLIR queries are typically several times larger than in monolingual search); • Easy tuning of parameters to achieve precision; • High quality translation of results and presentation according to the customers’ requirements; • The expected costs for customer support, integration and maintenance must be low.

Many academic experiments report average performance over a number of queries. A small increase in average performance may well hide a performance regression for a substantial number of individual queries. Furthermore, even though stopwords are often termed 17 This argument is obviously not without problems as very frequent words such as ‘not’ can easily change the meaning of a sentence to the contrary. 5 are based mainly on frequency counts, and do not employ deeper semantic analysis of text. a These words would be very likely candidates for inclusion in stopword lists English German the der (‘the’) to die (‘the’) a und (‘and’) of in (‘in’) and den (‘the’) in das (‘the’) for von (‘by’) that mit (‘with’) is im (‘in the’) said zu (‘to’) As determined by the processing of 1 year’s worth of newpaper stories for each language (published by the Los Angeles Times and Frankfurter Rundschau, respectively).

The question as to how to measure the effectiveness of an information retrieval system 6 As could be done with a database query. ” (Robertson 1977). 7 22 2 Within-Language Information Retrieval is thus a central one, and all steps taken to ensure retrieval effectiveness need to be properly evaluated. The chapter on evaluation (Chapter 5) addresses these questions in detail. For the time being, it is sufficient to introduce the two evaluation measures that are most widely used to assess retrieval effectiveness: precision and recall.

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Multilingual Information Retrieval: From Research To Practice by Carol Peters, Martin Braschler, Paul Clough

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