importance of search engines to information retrieval

Ngày tải lên: 07/03/2014, 02:20

... differ- ent retrieval strategies. Experimental out- comes confirm that our hypotheses hold in the context of Information Retrieval. 1 Introduction The task of an Information Retrieval (IR) system is to ... weight- ing schemes to match the query terms to the docu- ment keywords, in order to assess our hypotheses across a range of retrieval techniques. We asso- ciate improvement of retrieval performance ... assumed to be content-rich. In the context of the bag -of- words approach to IR investigated here, the grammatical well-formedness of the query is thus not an issue to be considered. In order to test...

Ngày tải lên: 08/03/2014, 02:21

Ngày tải lên: 12/08/2014, 18:20

Ngày tải lên: 10/06/2015, 17:15

... equity, seeing customer as a means of profit and cash flow. They converted customer’s view of brand performance and customer’s awareness into numerical indicators. Conclusively, one of the most important ... our sample profile and that of both fast food restaurant profiles gives us a reasonable ground to conclude that our sample profile is a representative of the actual customer profile of both fast ... of color dressed in the Swedish traditional custom. Max offers a wide range of services to customers. The possibility to compose their meals and choose from several different alternatives to...

Ngày tải lên: 24/09/2012, 17:19

Ngày tải lên: 26/11/2013, 13:24

... loan officer. These data thus provide an ideal opportunity to investigate the sources of value of relationships from being able to collect more information on a customer. Our first set of ... information used by banks. There are a number of important open questions for future research. Are there other sources of unobservable private information that loan officers incorporate into ... sources of value of relationships. We find that relationships between banks and retail customers prior to a loan application significantly reduce the default rates of loans given to these customers....

Ngày tải lên: 16/02/2014, 06:20

... Information Retrieval weighting schemes for sentiment analysis Georgios Paltoglou University of Wolverhampton Wolverhampton, United Kingdom g.paltoglou@wlv.ac.uk Mike Thelwall University of Wolverhampton Wolverhampton, ... variants The SMART retrieval system by Salton (1971) is a retrieval system based on the vector space model (Salton and McGill, 1986). Salton and Buckley (1987) provide a number of variants of the tf.idf weighting ... probabilistic model for information retrieval and is one of the most popular and effective algorithms used in in- formation retrieval. For ease of reference, we in- corporate the BM25 tf and idf factors into the SMART...

Ngày tải lên: 20/02/2014, 04:20

... of Opinionated Information Retrieval which is planned to be a module in a Cross-Language Opinion Extrac- tion system (CLOE). The main goal of this system is to provide access to opinionated information ... architecture of the CLOE system would be to implement the pro- cessing as a pipeline consisting, first, of using IR to retrieve certain articles relevant to the topic followed by second stage of classifying ... “positive” part. 4.1 Experiment 1 A corpus of E-Bay 4 customers’ reviews of products and services was used as a test corpus. The total number of reviews is 128, of which 37 are nega- tive (average length...

Ngày tải lên: 20/02/2014, 12:20

... exploited in order to re-score the set of translation candidates related to the source terms. Sequences of all possible combinations are con- structed between elements of sets of highly ranked translation ... a list of all possible phrases ranked in a form of hier- archy on the basis of word ranks associated to each translation alternative. Selection of a phrase will modify the ranked list of phrases ... alternatives. Each sequence is sent to a popular Web portal (here, Google) to discover how often the combination of translation alternatives ap- pears. Number of retrieved WWW pages in which the...

Ngày tải lên: 20/02/2014, 16:20

... word. This is to control for conceptual units, as opposed to conceptual relations. 5. Modify original definition of adjacency, which counted stop-list words, to one which ignores stop- list ... stop- list words. This is to correct for the distortion caused by the distribution of function words in the recognition of multi-word concepts. Figure 4. Modifications to Text Analysis Program ... results co~ared to the evaluations of the original analysis and to one another. From the compar- isons can be determined: the extent to which discourse theory can be translated into these terms;...

Ngày tải lên: 21/02/2014, 20:20

... Effect of 0.2% Triton X-100 on specific inhibitory activity of PAI-1 at 37 8C. The specific inhibitory activity of each variant is given as a fraction of the specific inhibitory activity of the same variant in ... is S/S/H. The composition S/S/Q is identical to that of alaserpin, S/G/H is identical to that of CP-9, A/G/H is identical to that of heparin cofactor II, while the S/A/S composition is present ... absence of a slight excess of vitronectin over PAI-1 [30]. A twofold dilution series of PAI-1, with or without vitronectin, was made immediately after refolding, to avoid loss of activity due to fast...

Ngày tải lên: 22/02/2014, 07:20

... the use of stemmers and morphological analysis to the use of thesauri (such as WordNet; see Fellbaum, 1998; Voorhees, 1998) to pad a query with synonyms, to the use of statistical analysis to identify ... the tools to conduct their own explorations of language. The more wildcards a query contains, the more degrees of freedom it offers to the explorer. Thus, the query “?scientist ‘s ?laboratory” ... Retrieval: A Robust Hybrid of Information Retrieval and Linguistic Creativity Tony Veale School of Computer Science and Informatics, University College Dublin, Belfield, Dublin D4, Ireland. Tony.Veale@UCD.ie Abstract Information...

Ngày tải lên: 07/03/2014, 22:20

... conception of “distillation” in the current DARPA GALE program. All these trends point to same problem: how do we build advanced information systems to address complex information needs? The value of ... component of many ques- tion answering strategies, it is important to understand the impact of different term- based techniques. Within a framework of sentence retrieval, we examine three fac- tors ... capabilities, fac- toid question answering systems are able to pin- point the exact span of text that directly satisfies an information need. Nevertheless, IR engines remain integral com- ponents of question...

Ngày tải lên: 08/03/2014, 02:21

Ngày tải lên: 16/03/2014, 03:20

... Languages: A Dictionary-Based Ap- proach to Multilingual Information Retrieval. In Proc. of the 19th Annual ACM Conference on Re- search and Development in Information Retrieval (SIGIR-1996), pages 49-57. ... variation of translation qual- ity and the variation of retrieval effectiveness to analyze the relationship between MT perform- ance and CLIR performance. 4.1 Degradation of MT System In this research, ... results in 39.41% reduction in retrieval effectiveness. This indicates that retrieval effectiveness is more sen- sitive to the size of the dictionary than to the size of the rule base for title...

Ngày tải lên: 17/03/2014, 04:20

... loan officer. These data thus provide an ideal opportunity to investigate the sources of value of relationships from being able to collect more information on a customer. Our first set of ... thus provide value to banks in screening, but they also provide value beyond this. To investigate further the source of value of relationships, we make use of the detailed information about ... percentage of months with a negative balance during the last 6 months, the usage of the credit limit, the percentage of months in excess of the credit limit, sum of account credits of the last...

Ngày tải lên: 22/03/2014, 21:20

... 1994. A System for Automating Concor- dance Line Selection. In Proceedings of NeMLaP, pages 95-100. H. P. Ednmndson. 1969. New Methods in Automatic Extracting. Journal of the ACM, 16(2):264-285. ... 1958. The Automatic Creation of Lit- erature Abstracts. IBM Journal for Research and Development, 2(2):159-165. K. Ono, K. Sumita, and S. Miike. 1994. Abstract Generation based on Rhetorical ... Extrac- tion. In Proceedings of COLING, pages 344-348. G. Salton, J. Allan, C. Buckley, and A. Singhal. 1994. Automatic Analysis, Theme Generation, and Summarization of Machine-Readable Texts....

Ngày tải lên: 23/03/2014, 19:20

Ngày tải lên: 24/03/2014, 03:20

Ngày tải lên: 30/03/2014, 01:20