a comparison of similarity measures for text documents

... the task of text classification in a Bayesian learning framework. This approach assumes that the text data was generated by a parametric model, and uses training data to calculate Bayes-optimal ... | s=1  |D| i=1 N is P(c j |d i ) . (6) The class prior parameters are calculated as before accordingtoEquation4. Classification Given estimates of these parameters calculated from the training documents, classification can be performed ... Machine Learning, 1997. Pat Langley, Wayne Iba, and Kevin Thompson. An anal- ysis of Bayesian classifiers. In AAAI-92, 1992. Leah S. Larkey and W. Bruce Croft. Combining classifiers in text categorization....

Ngày tải lên: 16/03/2014, 19:20

... though. As we have illustrated above and will elaborate below, these words can carry a wide variety of semantic and pragmatic overtones, which render the choice of a marker meaning- driven, as ... Proceedings of the 35th Annual Meeting of the ACL and 8th Conference of the Eu- ropean Chapter of the ACL, Madrid, July 1997. J. Martin. English Text - System and Structure. Philadelphia/Amsterdam: ... words are assigned to the realm of the lexicon, whereas function words are treated as a part of grammar. For dealing with discourse markers, we do not regard this distinction as particularly helpful,...

Ngày tải lên: 20/02/2014, 18:20

... Learning Research, 9:1871–1874, June. Jan Haji ˇ c, Massimiliano Ciaramita, Richard Johansson, Daisuke Kawahara, Maria Ant ` onia Mart ´ ı, Llu ´ ıs M ` arquez, Adam Meyers, Joakim Nivre, Sebastian Pad ´ o, ... dependency parsers). 3 Results Table 3 tabulates efficiency and performance for all parsers; UAS and LAS are unlabeled and labeled at- tachment scores, respectively — the standard crite- ria for evaluating ... reviewers, for valuable comments. Supported in part by the National Natural Science Founda- tion of China (NSFC) via grant 61133012, the National “863” Major Project grant 2011AA0 1A2 07, and the National...

Ngày tải lên: 23/03/2014, 14:20

... e-mail: A comparison of a Naive Bayesian and a memory-based approach. In H. Zaragoza, P. Gallinari, and M. Rajman, edi- tors, Proc. Workshop on Machine Learning and Tex- tual Infbrmation Access, ... classify e-mail. In Papers from the AAAI Spring Symposium on Machine Learning in Information Access, pages 18-25, Stanford, CA. AAAI Press. Thomas M. Cover and Joy A. Thomas. 1991. Elements of InfOrmation ... models for Naive Bayes text clas- sification. In Proc. AAAI-98 Workshop on Learning for Text Categorization, pages 41-48. AAAI Press. Dunja Mladeni6 and Marko Grobelnik. 1999. Feature selection for...

Ngày tải lên: 31/03/2014, 20:20

... now adopted AUC for evaluating predictive ability of classifiers owing to the fact that AUC is a better performance metric than accuracy [31]. In this study, AUC was used as a value to compare the ... BioMed Central Page 1 of 8 (page number not for citation purposes) Journal of Translational Medicine Open Access Research A comparison of classification methods for predicting Chronic Fatigue Syndrome ... as testing data and different nine-tenths of the data as training data. Finally, the average estimate over all runs was reported by running the above regular 10-fold cross-validation for 100 times...

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Ngày tải lên: 08/08/2014, 01:22

... See http://www.research.digital.com/SRC/juno-2. [ 10 ] JayaramanKrishnasamy, MarkJ.Jakiela, andDanielE.Whit- ney. Mechanics of vibration-assisted entrapment with appli- cation to design. In International Conference ... February 1971. [ 15 ] Balas K. Natarajan. Some paradigms for the automated de- sign of parts feeders. International Journal of Robotics Re- search, 8(6):98–109, December 1989. Also appeared in ... taking the Cartesian product over all the parameter values. It also allows us to specify equivalence classes of stable states, and it then automatically categorizes the state (and hence, the equivalence...

Ngày tải lên: 03/01/2014, 19:15

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Ngày tải lên: 19/02/2014, 03:20

... dependency parser. 1 Introduction A persistent goal of natural language processing research has been the automated transformation of natural language texts into representations that unambiguously ... training data is available. 6 Discussion Annotated corpora of linguistic phenomena en- able many new natural language processing ap- plications and provide new means for tackling difficult research ... International Conference on Language Resources and Evaluation, Granada, Spain. Marcus, Mitchell P., Beatrice Santorini and Mary Ann Marcinkiewicz. 1993. Building a Large Annotated Corpus of...

Ngày tải lên: 20/02/2014, 12:20

... empirical comparison of BP and DD also com- plements the theoretically-oriented comparison of marginal- and margin-based variational approxima- tions for parsing described by Martins et al. (2010). We ... in a previously circulated draft of this paper, for two reasons: we evaluate only on sentences for which a parse was returned instead of all parses, to enable direct comparison with Clark and ... features of the supertagger are all Markov features on adjacent supertags, the change has serious implications for search. If we think of the supertagger as defining a weighted regular language...

Ngày tải lên: 23/03/2014, 16:20

... having iden- tical sublanguage domain and test data, and using similar automata for analysis in the transfer system and transduction in the transducer system. Another justification is that ... particular type of fi- nite state automata associated with each word in the language. A relational head acceptor writes (or accepts) a pair of symbol sequences, a left sequence and a right sequence. ... function f as a real valued func- tion taking two arguments, a event e and a context c. The context c is an equivalence class of states un- der which an action is taken, and the event e is an equivalence...

Ngày tải lên: 24/03/2014, 03:21

... 1999. Foundations of Statistical Natural Language Pro- cessing. Cambridge, MA; London, U.K.: Bradford Book & MIT Press. Goran Nenadi´c, Sophia Ananiadou, and John Mc- Naught. 2004. Enhancing automatic ... Qualitative Evaluation of Association Measures for Collocation and Term Extraction Joachim Wermter Udo Hahn Jena University Language & Information Engineering (JULIE) Lab D-07743 Jena, Germany {wermter|hahn}@coling-uni-jena.de Abstract In ... Chapter of the Association for Com- putational Linguistics, pages 188–195. Toulouse, France, July 9-11, 2001. San Francisco, CA: Mor- gan Kaufmann. Katerina T. Frantzi, Sophia Ananiadou, and Hideki Mima....

Ngày tải lên: 31/03/2014, 01:20

... is based on Shannon’s entropy. It is a statistical measurement of the capability of a feature to separate digit classes. If the information measure of a feature is high, it indicates that the ... indicate a partial match. These 60 “best” features were selected using three measures: an information measure, an orthogonality measure, and a combination of the two. The information measure ... for the use of neural network learning techniques for this type of application and data set, and insight about the appropriate design, use, and parameterization of the network to achieve acceptable...

Ngày tải lên: 28/04/2014, 10:10

... 90(1):66-71. 15. Dias JJ, Dhukaram V, Abhinav A, Bhowal B, Wildin CJ: Clinical and radiological outcome of cast immobilization versus surgical treatment of acute scaphoid fractures at a mean follow-up of 93 ... system may relate to the thread pattern. The Acutrak 2 is a fully threaded design that generates a large amount of thread-to-bone contact area. In comparison, the Synthes screw has fewer threads, ... idea for the study and was responsible for revision of manuscript. The second author on the paper, JA, collected and analyzed the data and drafted the original manuscript. He is also the contact...

Ngày tải lên: 20/06/2014, 04:20

... 90(1):66-71. 15. Dias JJ, Dhukaram V, Abhinav A, Bhowal B, Wildin CJ: Clinical and radiological outcome of cast immobilization versus surgical treatment of acute scaphoid fractures at a mean follow-up of 93 ... greater final compression than the Synthes system may relate to the thread pattern. The Acutrak 2 is a fully threaded design that generates a large amount of thread-to-bone contact area. In comparison, ... idea for the study and was responsible for revision of manuscript. The second author on the paper, JA, collected and analyzed the data and drafted the original manuscript. He is also the contact...

Ngày tải lên: 20/06/2014, 07:20

... Epidemiology and Evaluation, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada Email: Amir Adel Rashidi - amiradel@interchange.ubc.ca; Aslam H Anis - aslam.anis@ubc.ca; Carlo A Marra* ... Health Utilities Index utilities? A comparison of patient and community preferences for health status in rheumatoid arthritis patients Amir Adel Rashidi 1 , Aslam H Anis 2 and Carlo A Marra* 3,4 Address: ... Marra* 3,4 Address: 1 Centre for Clinical Epidemiology and Evaluation, Faculty of Pharmaceutical Sciences, University of British Columbia, Canada, 2 MHA Program, Department of Health Care and Epidemiology,...

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Ngày tải lên: 20/06/2014, 15:20

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Ngày tải lên: 08/08/2014, 14:21