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Published byWilliam Roy Randall Modified over 9 years ago
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Ronan Collobert Jason Weston Leon Bottou Michael Karlen Koray Kavukcouglu Pavel Kuksa
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Common Approaches in NLP Using Task-specific features Knowledge injection about structure of data Expertise from Linguists Approach used in the paper No task-specific feature engineering Minimal prior Knowledge
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Part-Of-Speech (POS) Tagging Syntactic Parsing Chunking Shallow Parsing Named Entity Recognition Person, Location etc. Semantic Role Labelling
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Words to Feature Vectors Look up Table Random initialization vs Unsupervised Pre- training Extending to any Discrete Features Extracting Higher level Features from Word Feature Vectors Window Approach Sentence Approach
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Word-Level Log Likelihood Only words are taken independently for optimizing the weights Sentence-Level Log Likelihood Optimization function takes into account all the tags as well as transitions between tags Stochastic Gradient Standard Optimization Algorithm
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