a mccallum and k nigam a comparison of event models for naive bayes text

A Comparison of Event Models for Naive Bayes Text Classication potx

... the task of text classification in a Bayesianlearning framework. This approach assumes that the text data was generated by a parametric model, and uses training data to calculate Bayes- optimal ... length, their event model is no longerstrictly a multinomial. A Comparison of Event Models for Naive Bayes Text ClassificationAndrew McCallum ‡† mccallum@ justresearch.comKamal Nigam †knigam@cs.cmu.edu‡Just ... 1976.Mehran Sahami, Susan Dumais, David Heckerman, and Eric Horvitz. A bayesian approach to filtering junk e-mail.In AAAI-98 Workshop on Learning for Text Categoriza-tion, 1998.Mehran Sahami. Learning...

Báo cáo khoa học: "A Comparison of Event Models for Naive Bayes Anti-Spam E-Mail Filtering" potx

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... McCallum and Kamal Nigam. 1998. A com-parison of event models for Naive Bayes text clas-sification. In Proc. AAAI-98 Workshop on Learning for Text Categorization, pages 41-48. AAAI Press.Dunja ... 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, ... performance.ReferencesIon Androutsopoulos, John Koutsias, Konstantinos V.Chandrinos, and Constantine D. Spyropoulos.200 0a. An experimental comparison of Naive Bayesian and keyword-based anti-spam filteringwith...

Báo cáo hóa học: " Comparison of regression models for estimation of isometric wrist joint torques using surface electromyography" potx

Danh mục: Hóa học - Dầu khí

... feasible.AcknowledgementsAuthors would like to thank the reviewers for their valuable suggestions,Zeeshan O Khokhar and Zhen G Xiao for designing the test rig, and MojganTavakolan and Farzad ... Architecture of selected muscles of the arm and forearm: anatomy and implications for tendon transfer. J Hand Surg 1992, 1 7A: 787-798.Ziai and Menon Journal of NeuroEngineering and Rehabilitation ... t hat using mo re data for training models increases accuracy for same session models. Table 5 compares NRMSE and R2 a for two extremecases where 25% and 90% of the data set is used for training...

báo cáo hóa học: "Learning to perform a new movement with robotic assistance: comparison of haptic guidance and visual demonstration" pptx

Danh mục: Hóa học - Dầu khí

... pathevolving away from the desired path and toward an attrac-tor path.Role of haptic and visual training in trajectory learningBoth repeated haptic guidance and visual demonstrationgradually improved ... Irvine, CA, USA, 2Department of Neurology, and Department of Anatomy and Neurobiology, University of California, Irvine, CA, USA and 3Department of Biomedical Engineering, University of California, ... the performance metric for shape learningwith haptic information alone was significantly worsethan learning with visual information alone, when visualinformation was available during recall....

Tài liệu Báo cáo khoa học: Fish and molluscan metallothioneins A structural and functional comparison ppt

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... Fish and molluscan metallothioneins A structural and functional comparison Laura Vergani1, Myriam Grattarola1, Cristina Borghi2, Francesco Dondero3 and Aldo Viarengo3,41 Department of ... growthwere purchased from Fluka (Milan, Italy). T4 DNA ligase and Taq polymerase were from Stratagene (La Jolla, CA,USA), and restriction enzymes and dNTPs from PromegaItalia (Milan, Italy). Expression ... weadded a BamHI site upstream from the ATG codon, usingthe 5Â-end primer (5Â-CTACTACGAATTAGGATCCCCTGCACCTTG-3Â) and the 3Â-end primer (5Â-GTAATACGACTCACTATAGGGCGAATTGGG-3Â). Amplication wasperformed...

Retrieval of the source location and mechanical descriptors of a hysteretically-damped solid occupying a half space by full wave inversion of the the response signal on its boundary doc

Danh mục: Kĩ thuật Viễn thông

... obtain a reliable retrieval of the imaginarypart of à for ±10% discordance of any of the other mechanical descriptors or of x1.On the other hand, it was shown that a ±10% discordance of the ... numerical translation.The numerics were of a very basic variety in both the data simulation and retrieval models: Simpson quadrature for the ﬁrst (ξ) integral and Simpson quadrature for the ... measured, in any case, known)temporal response (the data) at a location on the (ﬂat) bounding surface.In the geophysical context (Tarantola,1986; Sacks & Symes, 1987; Aki & Richards, 1980),...

Báo cáo khoa học: "A Comparison of Chinese Parsers for Stanford Dependencies" ppt

Danh mục: Báo cáo khoa học

... LearningResearch, 9:1871–1874, June.Jan Hajiˇc, Massimiliano Ciaramita, Richard Johansson,Daisuke Kawahara, Maria Antònia Mart´ı, Llu´ıs Màrquez,Adam Meyers, Joakim Nivre, Sebastian Padó, ... constituent parsers) and part -of- speech tagging (for dependency parsers).3 ResultsTable 3 tabulates efficiency and performance for allparsers; UAS and LAS are unlabeled and labeled at-tachment scores, ... pages433–440, Sydney, Australia, July. Association for Computa-tional Linguistics.Alexander M. Rush, David Sontag, Michael Collins, and Tommi Jaakkola. 2010. On dual decomposition and linearprogramming...

Báo cáo khoa học: "A robust and extensible exemplar-based model of thematic ﬁt" ppt

Danh mục: Báo cáo khoa học

... work was supported by a grant from theResearch Foundation – Flanders (FWO). We aregrateful to Ken McRae and Ulrike Padó for mak-ing their datasets available, Dekang Lin for thethesaurus, ... exemplar-based model of thematic fitBram Vandekerckhove a , Dominiek Sandra a , Walter Daelemansb a Center for Psycholinguistics,bCenter for Dutch Language and Speech (CNTS)University of AntwerpAntwerp, ... Psychology-General,115(1):39–57.Sebastian Padó and Mirella Lapata. 2007.Dependency-based construction of semantic space models. Computational Linguistics, 33(2):161–199.Ulrike Padó, Frank Keller, and Matthew Crocker.2006....

báo cáo sinh học:" Narrowing the gap between eye care needs and service provision: a model to dynamically regulate the flow of personnel through a multiple entry and exit training programme" pdf

Danh mục: Điện - Điện tử

... Research and School of Public Health and Community Medicine, University of New South Wales, Kensington, AustraliaEmail: Keith Masnick - keith@masnick.com.auAbstractBackground: The purpose of this ... sys-tem as a whole. The inclusion of feedback and temporalfeatures makes the model dynamic and non-linear ratherthan static and linear.Testing the hypothesisBuilding the simulation components of ... stocks and flows of personnel through training and into and out of the workforceFigure 8The computable model of an eye care MEES showing the stocks and flows of personnel through training and...

Báo cáo hóa học: " Characterizing the burden of premature ejaculation from a patient and partner perspective: a multi-country qualitative analysis" docx

Danh mục: Điện - Điện tử

... of Good Practice for the Translation and Cultural Adaptation Process for Patient-Reported Out-comes (PRO) Measures: report of the ISPOR Task Force for Translation and Cultural Adaptation. Value ... US, UK, Italy, France, Germany, and Poland. Study participants included heterosexualmen with PE and female partners of males with PE. All participants were asked about how PE affects theirdaily ... http://www.hqlo.com/content/6/1/33Page 10 of 10(page number not for citation purposes)analyzed the data. MR and AG conceptualized and designed the study, interpreted the qualitative data and drafted and revised the manuscript....

Báo cáo hóa học: " Research Article A Comparison of Detection Performance for Several Track-before-Detect Algorithms" doc

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... give approximately thesame false alarm performance, and eﬀort was made to opti-mise the algorithm code for speed. A more detailed analysis of algorithm performance as a function of various parame-ters ... Colegrove, A. W. Davis, and J. K. Ayliﬀe, “Track ini-tiation and nearest neighbours incorporated into probabilis-tic data association,” Journal of Electrical and Electronics Engi-neers, Australia, ... maxC k 1x k 1+logpx k | x k 1.(17)(3) The estimated state sequence is found by backtrackingx k =arg max C k x k , k = k max,θ k x k+ 1, otherwise.(18)As for the Bayesian algorithm above,...

Báo cáo khoa học: "Effects of Combination Dietary Conjugated Linoleic Acid with Vitamin A (Retinol) and Selenium on the Response of the Immunoglobulin Productivity in Mice" pdf

Danh mục: Báo cáo khoa học

... 5mg /kg/day; CVA1); Group 5, 1.5% CLA and vitaminADE (CVA2); Group 6, 0.5% CLA and selenium (1㎍/kg/day;CS1); Group 7, 1.5% CLA and selenium (CS2). Water and food were available ad libitum for ... seleniumat 1㎍/kg/day [23].Vitamin E and D were used as antioxidants and supplements to vitamin A. Preparation of serumAfter 3 weeks of feeding, blood was withdrawn from theabdominal vena cava under ... group that was fed a diet without CLA.Additionally, the two combination dietary groups (CLA and vitamin ADE, CLA and selenium) had higher levels of Ig and secretory IgA than those of the CLA-only...

Báo cáo lâm nghiệp: "A comparison of fitting techniques for ponderosa pine height-age models in British Columbia" potx

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... ineach variant. The parameter estimates changed from variant tovariant, but the shape of the curves only changed marginally,at least within the range of the of the data.The statistical analysis ... the data mustbe taken into consideration and also there are no confidenceintervals to indicate statistical differences. Discrepancies areevident at young ages and at old ages, particularly for ... Sta-tistical inference, Springer-Verlag Inc., New York, 1985.[13] Klinka K. , Worrall J., Skoda L., Varga P., The distribution and synopsis of ecological and silvical characteristics of tree species of British...