a comparison of event models for naive bayes text classification

... 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 ... 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

... 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, ... event 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 ... 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...

Ngày tải lên: 31/03/2014, 20:20

Ngày tải lên: 08/08/2014, 01:22

... 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

... original and resampled data sets. One-way Analysis of Variance (ANOVA) failed to reject the null hypothesis that NRMSE and R 2 a have dif- ferent mean values for each model, meaning that the difference ... formulation are available in [54]. ε-SVR has previously been utilized for estimation of grasp forces [22,25]. The Gaussian kernel was used as it enables nonlinear mapping of samples and has a ... IEEE Transactions on Neural Systems and Rehabilitation Engineering 10(1):30-37. 57. Hiraiwa A, Shimohara K, Tokunaga Y: EMG Pattern Analysis and Classification by Neural Network. Systems, Man and...

Ngày tải lên: 19/06/2014, 08:20

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 14/08/2014, 13:22

... 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

...

Ngày tải lên: 19/02/2014, 03:20

... 2007). 5 A Comparison of High-Level Full-System Power Models Suzanne Rivoire Sonoma State University Parthasarathy Ranganathan Hewlett-Packard Labs Christos Kozyrakis Stanford University Abstract Dynamic ... a variety of software workloads and hardware platforms. The desirable properties of a full-system model suitable for this type of online use are as follows: Accuracy: The model must be accurate ... we use a common infrastructure to generate several high-level full-system power models for a wide range of workloads and machines, and we compare the accuracy of these models in each instance....

Ngày tải lên: 19/02/2014, 18:20

... 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

... over this subsample. The final table presents a multivariate measure of forecast accuracy, namely the trace of the forecast error covariance matrix. 4.1 Overall forecast performance 4.1.1 GDP ... influence of time-varying parameters and a large information set on forecast performance. The TVAR model that uses the lag of inflation as the threshold variable consistently delivers more accurate forecasts ... between the forecasting performance of an AR(1) model and that of a TVP-VAR (standard) (and hence white cells on the right-hand side of Table C). Note also that allowing for heteroscedastic shocks...

Ngày tải lên: 06/03/2014, 14:20

... (ITF). A direct comparison reveals that all language models are highly correlated; however, the average ISF and ITF values are 5.5 and 10.4 higher than IDF. All language models appeared to ... comparisons among these the event spaces. (4) Abstract versus full -text comparison Language models of scientific articles often consider only abstracts because they are easier to obtain than full -text ... 0 5 10 15 123456789101112131415161718 Global IDF Average Local IDF ACHRE4 ANCHAM BICHAW BIPRET BOMAF6 CGDEFU CMATEX ESTHAG IECRED INOCAJ JACSAT JAFCAU JCCHFF JCISD8 JMCMAR JNPRDF JOCEAH JPCAFH JPCBFK JPROBS MAMOBX MPOHBP NALEFD OPRDFK ORLEF7 ...

Ngày tải lên: 17/03/2014, 04:20

... overall. Cost ____________ 15 Warrant officers are managed according to the Warrant Officer Management Act, which was passed as part of the National Defense Authorization Act for Fiscal Years ... The services share the same basic pay table for officers, enlisted personnel, and warrant officers. The basic pay table includes an amount for each pay grade 6 as well as incremental longevity ... enough effort in those performance areas that are measured and that matter for positive evaluation necessary for promotion. Many Elements of the Tournament System Are Important in the Military There are...

Ngày tải lên: 23/03/2014, 02:20

... combined models. Our 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 ... 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 ... Hockenmaier and M. Steedman. 2002. Generative models for statistical parsing with Combinatory Cat- egorial Grammar. In Proc. of ACL. J. Hockenmaier and M. Steedman. 2007. CCGbank: A corpus of CCG...

Ngày tải lên: 23/03/2014, 16:20

... 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 ... 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 ... 2.1 Monolingual Relational Models We can characterize the language models used for analysis and generation in the transfer system as quantitative generative models of ordered depen- dency...

Ngày tải lên: 24/03/2014, 03:21

... 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 ... 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 ... between a feature’s template and the input image. A value of 0 indicates that a feature template did not match the digit image; a value of 1 indicates a complete match; and values in between these...

Ngày tải lên: 28/04/2014, 10:10

... 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 ... SNPs for the naive Bayes classifier with the wrapper-based approach (n = 8) was less than the one for the naive Bayes classifier with the hybrid approach (n = 12). Discussion We have compared...

Ngày tải lên: 18/06/2014, 15:20

Ngày tải lên: 20/06/2014, 04:20

Ngày tải lên: 20/06/2014, 07:20