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

A Comparison of Event Models for Naive Bayes Text Classication potx

Ngày tải lên : 16/03/2014, 19:20

... 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 ... length, their event model is no longer strictly a multinomial. A Comparison of Event Models for Naive Bayes Text Classification Andrew McCallum ‡† mccallum@ justresearch.com Kamal 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...

8
519
0

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

Ngày tải lên : 31/03/2014, 20:20

... McCallum and Kamal Nigam. 1998. A comparison of event models for Naive Bayes text classification. 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. References Ion Androutsopoulos, John Koutsias, Konstantinos V. Chandrinos, and Constantine D. Spyropoulos. 200 0a. An experimental comparison of Naive Bayesian and keyword-based anti-spam filtering with...

8
514
0

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

Ngày tải lên : 19/06/2014, 08:20

... feasible. Acknowledgements Authors would like to thank the reviewers for their valuable suggestions, Zeeshan O Khokhar and Zhen G Xiao for designing the test rig, and Mojgan Tavakolan 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 R 2 a for two extreme cases where 25% and 90% of the data set is used for training...

12
560
0

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

Ngày tải lên : 19/06/2014, 10:20

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

10
405
0

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

Ngày tải lên : 19/02/2014, 07:20

... Fish and molluscan metallothioneins A structural and functional comparison Laura Vergani 1 , Myriam Grattarola 1 , Cristina Borghi 2 , Francesco Dondero 3 and Aldo Viarengo 3,4 1 Department of ... growth were purchased from Fluka (Milan, Italy). T4 DNA ligase and Taq polymerase were from Stratagene (La Jolla, CA, USA), and restriction enzymes and dNTPs from Promega Italia (Milan, Italy). Expression ... we added a BamHI site upstream from the ATG codon, using the 5Â-end primer (5Â-CTACTACGAATTAGGATCCCCT GCACCTTG-3Â) and the 3Â-end primer (5Â-GTAATACGA CTCACTATAGGGCGAATTGGG-3Â). Amplication was performed...

10
414
0

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

Ngày tải lên : 18/03/2014, 01:21

... obtain a reliable retrieval of the imaginary part of à for ±10% discordance of any of the other mechanical descriptors or of x 1 . 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),...

26
467
0

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

Ngày tải lên : 23/03/2014, 14:20

... 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, ... constituent parsers) and part -of- speech tagging (for dependency parsers). 3 Results Table 3 tabulates efﬁciency and performance for all parsers; UAS and LAS are unlabeled and labeled at- tachment scores, ... pages 433–440, Sydney, Australia, July. Association for Computa- tional Linguistics. Alexander M. Rush, David Sontag, Michael Collins, and Tommi Jaakkola. 2010. On dual decomposition and linear programming...

6
460
0

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

Ngày tải lên : 24/03/2014, 03:20

... work was supported by a grant from the Research Foundation – Flanders (FWO). We are grateful to Ken McRae and Ulrike Pad ´ o for mak- ing their datasets available, Dekang Lin for the thesaurus, ... exemplar-based model of thematic ﬁt Bram Vandekerckhove a , Dominiek Sandra a , Walter Daelemans b a Center for Psycholinguistics, b Center for Dutch Language and Speech (CNTS) University of Antwerp Antwerp, ... Psychology-General, 115(1):39–57. Sebastian Pad ´ o and Mirella Lapata. 2007. Dependency-based construction of semantic space models. Computational Linguistics, 33(2):161–199. Ulrike Pad ´ o, Frank Keller, and Matthew Crocker. 2006....

9
367
0

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

Ngày tải lên : 18/06/2014, 17:20

... Research and School of Public Health and Community Medicine, University of New South Wales, Kensington, Australia Email: Keith Masnick - keith@masnick.com.au Abstract Background: The purpose of this ... sys- tem as a whole. The inclusion of feedback and temporal features makes the model dynamic and non-linear rather than static and linear. Testing the hypothesis Building the simulation components of ... stocks and flows of personnel through training and into and out of the workforceFigure 8 The computable model of an eye care MEES showing the stocks and flows of personnel through training and...

6
442
0

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

Ngày tải lên : 18/06/2014, 22:20

... 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 heterosexual men with PE and female partners of males with PE. All participants were asked about how PE affects their daily ... http://www.hqlo.com/content/6/1/33 Page 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....

10
514
0

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

Ngày tải lên : 22/06/2014, 19:20

... give approximately the same 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,...

10
260
0

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

Ngày tải lên : 07/08/2014, 17:22

... 5mg /kg/day; CVA1); Group 5, 1.5% CLA and vitamin ADE (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 ... selenium at 1 ㎍ /kg/day [23]. Vitamin E and D were used as antioxidants and supplements to vitamin A. Preparation of serum After 3 weeks of feeding, blood was withdrawn from the abdominal 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...

6
344
0

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

Ngày tải lên : 08/08/2014, 01:22

... in each variant. The parameter estimates changed from variant to variant, but the shape of the curves only changed marginally, at least within the range of the of the data. The statistical analysis ... the data must be taken into consideration and also there are no confidence intervals to indicate statistical differences. Discrepancies are evident 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...