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Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

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Nội dung chi tiết: Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

An Improved Term Weighting Scheme for Text CategorizationPham Xuan NguyenFaculty of Information Technology University of Engineering and Technology Vi

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01 ietnam National University, HanoiSupervised by Dr. Le Quang Hit'llA thesis submitted in fulfillment of the requirements for the degree ofMaster of Sci

ence in Computer Science41852ORIGINALITY STATEMENT‘1 hereby declare that this siibniisúoii is my own work, 'lb t he best of my knowledge, it contains Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

no materials previously published by another person, or substantial proportions of material which have bextn accepted for the award of any other degre

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

es or diplomas at. University of Engineering anil T

An Improved Term Weighting Scheme for Text CategorizationPham Xuan NguyenFaculty of Information Technology University of Engineering and Technology Vi

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01 al content of this thesis is the product of my own work, except to the extent that assistance from others in the project’s design and conception or in

style, presentation and linguistic expression arc acknowledged.’Hanoi, August. 24th. 2014Signed............................................Supervisor Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

Signed ..........................................JudgeSigned ..........................................ỈABSTRACTIn text categorization. term weighting

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

is lhe task to assign weights to terms (luring the document presentation phase. Thus, it affects the classification performance. In addition to resul

An Improved Term Weighting Scheme for Text CategorizationPham Xuan NguyenFaculty of Information Technology University of Engineering and Technology Vi

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01 two categories, namely, supervised and unsupervised [27]. The traditional term weighting schemes such as binary, if and ff.idf |38], belong to unsupe

rvised term weighting methods. Other schemes (for example, tf.\2 [12]) that make use of the prior information about the membership of training documen Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

ts, belong to the supervised term weighting methods.The supervised term weighting method tf.rf [27] is one of the most effective schemes to date. It s

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

howed better performance than many others (27). However, tf.rf is not the best in some cases. Moreover, tf.rf requires many rf values for each term.In

An Improved Term Weighting Scheme for Text CategorizationPham Xuan NguyenFaculty of Information Technology University of Engineering and Technology Vi

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01 . Furthermore, our scheme is simpler than tf.rf because it only uses the maximum value of if for each term. Our experimental results showed that our s

cheme is consistently better than {/.if and ot hers.iiTo my family Ọ:::ACKNOWLEDGEMENTSFirst, I would like to express my gratitude to my supervisor, D Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

r. I.e Quang Hieu. He guided Hie throughout the years and gave Hie several useful advices about study method. He was very patient with me. His words i

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

nfluenced strongly on me. I also would like to give my honest appreciation to my colleagues at Hoahi University and University of Engineering and Ifec

An Improved Term Weighting Scheme for Text CategorizationPham Xuan NguyenFaculty of Information Technology University of Engineering and Technology Vi

Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01 ......... 11.2Structure of this Thesis ..................................... 22Overview of Text Categorization42.1Introduction........................

.......................... 4 Luận văn thạc sĩ an improved term weighting scheme for text categorization m a thesis information technology 60 48 01

An Improved Term Weighting Scheme for Text CategorizationPham Xuan NguyenFaculty of Information Technology University of Engineering and Technology Vi

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