New PDF release: Conceptual Information Retrieval: A Case Study in Adaptive

By Michael L. Mauldin

ISBN-10: 1461367905

ISBN-13: 9781461367901

ISBN-10: 1461540046

ISBN-13: 9781461540045

The infonnation revolution is upon us. while the commercial revolution heralded the systematic augmentation of human actual obstacles by means of har­ nessing exterior strength resources, the infonnation revolution strives to reinforce human reminiscence and psychological processing obstacles by means of harnessing exterior computational assets. pcs can gather. transmit and output even more infonnation and in a extra well timed style than extra con­ ventional revealed or spoken media. Of higher curiosity, despite the fact that, is the computer's skill to method, classify and retrieve infonnation selectively according to the desires of every human person. One can't drink from the fireplace hydrant of infonnation with out being instantly flooded with beside the point textual content. fresh technological advances resembling optical personality readers in basic terms exacerbate the matter by means of expanding the quantity of digital textual content. simply as steam and inner combustion engines introduced robust power assets less than regulate to yield precious paintings within the commercial revolution, so needs to we construct computational engines that keep watch over and practice the large infonnation resources that they could yield beneficial wisdom. info technology is the learn of systematic ability to regulate, classify, technique and retrieve massive quantities of infonnation in digital fonn. In par­ ticular, numerous methodologies were built to categorise texts manually via annies of human indexers, as illustrated rather essentially on the nationwide Library ofMedicine, and plenty of computational suggestions were built to look textual facts bases instantly, equivalent to full-text key-phrase searches. In general.

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Extra info for Conceptual Information Retrieval: A Case Study in Adaptive Partial Parsing

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To find the degree of similarity between two documents, the method is to: • detennine frequencies of each index tenn in the document collection. • for any two documents, view the frequency lists for those documents as vectors in multidimensional space, and calculate the cosine of the angle between the two vectors. The problem with this approach is that a typical user query will not have enough words to give a statistically meaningful frequency vector: this method only works for measuring the differences between two documents.

His system was able to learn grammars for subsets of English, Japanese and Chinese. 38 CONCEPTUAL INFORMAnON RElRIEVAL Jill Fain Lehman at Carnegie Mellon has written a command language parser called CHAMP for "Chameleonic Parser" that adapts to its users by learning new grammar rules. Using operators such as token deletion, insertion and replacement. CHAMP modifies an initial "vanilla" grammar to the style of commands actually used by the individual [Lehman 89], [Lehman & Carbonell 88]. An interesting theoretical result obtained by Berwick is that for one definition of "easily parseable, " that is bounded context parseability, the resulting grammar must be "easily learnable," using the bounded degree of learning model [Berwick 84].

3 contains a thorough discussion of FRUMP, and Chapter 4 describes how our research into FERRET extends the work done on FRUMP. The RULEPAR parser developed by Jaime Carbonell at Carnegie Mellon as part of the MEDSORT project is example of case frame parsing applied to information retrieval [Carbonell & Thomason 86], [Carbonell et al. 8Sa]. RULEPAR combines both syntax and semantics to build case frames representing (for this particular project) the titles of medical papers about rheumatoid arthritis.

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Conceptual Information Retrieval: A Case Study in Adaptive Partial Parsing by Michael L. Mauldin


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