TAILIEUCHUNG - Báo cáo khoa học: "A study of Information Retrieval weighting schemes for sentiment analysis"

Most sentiment analysis approaches use as baseline a support vector machines (SVM) classifier with binary unigram weights. In this paper, we explore whether more sophisticated feature weighting schemes from Information Retrieval can enhance classification accuracy. We show that variants of the classic scheme adapted to sentiment analysis provide significant increases in accuracy, especially when using a sublinear function for term frequency weights and document frequency smoothing. | A study of Information Retrieval weighting schemes for sentiment analysis Georgios Paltoglou University of Wolverhampton Wolverhampton United Kingdom Mike Thelwall University of Wolverhampton Wolverhampton United Kingdom Abstract Most sentiment analysis approaches use as baseline a support vector machines SVM classifier with binary unigram weights. In this paper we explore whether more sophisticated feature weighting schemes from Information Retrieval can enhance classification accuracy. We show that variants of the classic scheme adapted to sentiment analysis provide significant increases in accuracy especially when using a sublinear function for term frequency weights and document frequency smoothing. The techniques are tested on a wide selection of data sets and produce the best accuracy to our knowledge. 1 Introduction The increase of user-generated content on the web in the form of reviews blogs social networks tweets fora etc. has resulted in an environment where everyone can publicly express their opinion about events products or people. This wealth of information is potentially of vital importance to institutions and companies providing them with ways to research their consumers manage their reputations and identify new opportunities. Wright 2009 claims that for many businesses online opinion has turned into a kind of virtual currency that can make or break a product in the marketplace . Sentiment analysis also known as opinion mining provides mechanisms and techniques through which this vast amount of information can be processed and harnessed. Research in the field has mainly but not exclusively focused in two subproblems detecting whether a segment of text either a whole document or a sentence is subjective or objective . contains an expression of opinion and detecting the overall polarity of the text . positive or negative. Most of the work in sentiment analysis has focused on supervised learning .

• Báo cáo khoa học
• A study of Information
• Retrieval weighting schemes
• sentiment analysis
• báo cáo khoa học
• báo cáo ngôn ngữ
• ngôn ngữ tự nhiên
• Graduate study
• Improvement of graduate study
• Graduate study information
• Faculty of humanities and social sciences
• Humanities and social sciences
• Khon Kaen university
• International Journal of Computer Science & Communication Networks
• Study of information hiding techniques
• Information hiding techniques like steganography
• Down through age
• Information hiding classification
• Social sciences and humanities
• Information technology education graduates
• Information technology education
• Employability tracer study
• State university
• Akaike information criteria
• Bayesian information criterion
• Vuongs test
• Poisson regression
• Zeroinated poisson regression
• Negative binomial regression
• Enumeration survey method
• Sub counties in Kiambu
• Automated information systems Improve
• Automated Information Systems
• Integrated Financial Management Information System
• Effect of information quality
• Favor of hedonic
• Purchase intention and information quality
• Long term project
• Dimension of information quality
• Problem solving
• Information problem solving
• Ill structured problem solving
• Information literacy
• Cross case comparison study
• An Empirical Study
• Information Synthesis Tasks
• Enrique Amig
• mô hình ngôn ngữ
• xử lý ngôn ngữ tự nhiên
• Management information
• Study Text 2015
• English test preparation
• English Review
• Learn English
• English Quizzes
• Intra organizational
• Knowledge transfer Firm Performance
• Vietnam’s information technology companies
• Technology companies
• IS success model
• TAM model
• Top management support
• User satisfaction
• Information system quality
• Management Information System
• Business decision making
• Managerial decision making
• Quality of decision making
• Development of information technology
• Media sale clear
• CV Tanaka Service
• Sale information system
• Web based information system
• Development of business
• Graduation thesis
• Graduation thesis English language
• Specialized terminologies translation
• Information technology
• Language in information technology
• Geographic information system
• Remote sensing
• National park
• Rhododendron arboreum SM
• Communication media
• Rural women
• Seeking information by the rural women
• Constraints in seeking information
• Basis of highest area
• Business and Information
• integrated expertise
• business discipline
• new and emerging
• postgraduate study
• Bachelor of Commerce
• Information
• Technology Worker
• thesis
• internship reports
• project course
• graduate thesis
• English majors
• English computer science
• English materials sector informatics
• Theoretical computer science
• Information technology study
• Information technology language
• license Information
• Usage Rights
• health
• health document
• health ebook
• health specific study
• health research
• Biological information
• Lecture Genetics
• Human genetics
• Modern genetic techniques
• Molecular interactions
• Modular construction
• values include
• individual
• freedom of religion
• embraces mutual
• Further information
• information carefully
• Pine valley furniture
• usiness system development
• Information systems
• Information systems analysis
• Application software
• Systems development
• Business system development