TAILIEUCHUNG - Báo cáo khoa học: "Enhancing Performance of Lexicalised Grammars"

This paper describes how external resources can be used to improve parser performance for heavily lexicalised grammars, looking at both robustness and efficiency. In terms of robustness, we try using different types of external data to increase lexical coverage, and find that simple POS tags have the most effect, increasing coverage on unseen data by up to 45%. We also show that filtering lexical items in a supertagging manner is very effective in increasing efficiency. | Enhancing Performance of Lexicalised Grammars Rebecca Dridanf Valia Kordonif Jeremy Nicholsonft fDept of Computational Linguistics Saarland University and DFKI GmbH Germany tDept of Computer Science and Software Engineering and NICTA University of Melbourne Australia rdrid kordoni @ jeremymn@ Abstract This paper describes how external resources can be used to improve parser performance for heavily lexicalised grammars looking at both robustness and efficiency. In terms of robustness we try using different types of external data to increase lexical coverage and find that simple POS tags have the most effect increasing coverage on unseen data by up to 45 . We also show that filtering lexical items in a supertagging manner is very effective in increasing efficiency. Even using vanilla POS tags we achieve some efficiency gains but when using detailed lexical types as supertags we manage to halve parsing time with minimal loss of coverage or precision. 1 Introduction Heavily lexicalised grammars have been used in applications such as machine translation and information extraction because they can produce semantic structures which provide more information than less informed parsers. In particular because of the structural and semantic information attached to lexicon items these grammars do well at describing complex relationships like non-projectivity and center embedding. However the cost of this additional information sometimes makes deep parsers that use these grammars impractical. Firstly because if the information is not available the parsers may fail to produce an analysis a failure of robustness. Secondly the effect of analysing the extra information can slow the parser down causing efficiency problems. This paper describes experiments aimed at improving parser performance in these two areas by annotating the input given to one such deep parser the PET parser Callmeier 2000 which uses lex-icalised grammars developed under the HPSG

• Báo cáo khoa học
• Enhancing Performance
• Lexicalised Grammars
• Rebecca Dridan
• báo cáo khoa học
• báo cáo ngôn ngữ
• xử lý ngôn ngữ tự nhiên
• Journal of Science and Technology
• Zno microrods surface decorated
• WO3 nanorods for enhancing NH3 gas sensing performance
• Enhancing NH3 gas sensing performance
• Single crystalline ZnO microrods
• Sheep and goats
• Performance of sheep
• Performance of goats
• Probiotic for enhancing
• Feeding of various minerals
• Environmental strategy
• Entrepreneurial innovation
• Firm performance
• Energy efficiency
• Enhancing firm environmental performance
• Enhancing Unlexicalized Parsing Performance
• a Wide Coverage Lexicon
• Fuzzy Tag set Mapping
• EM HMM based Lexical Probabilities
• scientific reports
• model language
• process natural language
• Psychological Management
• Individual Performance
• Assessing Potential
• Psychological Perspective
• ENSURING PERFORMANCE
• Organizational Culture
• International Journal of Computer Science & Communication Networks
• Enhancing the performance of DSR routing protocol
• Link breakage prediction
• Vehicular Ad hoc Network
• The well known Dynamic Source Routing protocol
• The original protoco
• Black gram
• Extension gap
• Technology index
• Technology gap
• Enhancing the productivity
• Kharif black gram (Vigna mungo L
• Copper Alloys
• Characteristic Microstructures
• Interaction of Copper
• High Performance
• Lead Free Wrought
• Enhancing Coach
• Athlete Relationships
• Sport Psychology
• Basketball Performance
• Psychological Interventions
• Focused Baseball
• Psychology of Cy
• Cluster bean
• Front line demonstration
• Performance of cluster bean variety MDU 1
• Cluster bean variety MDU 1
• Enhancing productivity of cluster bea
• Aerobic Digestion
• Agro Industrial Wastes
• Solid State
• Fermentation Processes
• Types of Waste
• Pozzolanic Materials
• tài liệu kinh tế
• quản trị tài chính
• thị trường tài chính
• báo cáo tài chính
• đầu tư tài chính
• báo cáo hóa học
• công trình nghiên cứu về hóa học
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• values include
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• Exert Greater Influence
• Kabuli Chickpea
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• Explorative Factor Analysis
• Enhancing the steel export
• Mobarakeh steel producer in Iran
• Country’s non oil products
• Principle component analysis
• Activities of corporate social responsibility
• Enhancing Corporate Reputation
• Assessing Corporate Social Responsibility
• Private sector banks
• Employees of the bank
• Relaxor ferroelectrics
• Lattice distortion
• Grain size
• Recoverable energy
• Advanced materials and devices
• Plant Biology
• Dark septate endophytes
• Trichoderma viride
• Root development
• Non host endophytes
• Doctoral dissertation
• Doctoral dissertation in computer science
• The ME detection in scientific document images
• Mathematical expression detection
• Scientific document images
• Tóm tắt luận án Tiến sĩ
• Tóm tắt Luận án Tiến sĩ Khoa học máy tính
• Computer science
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