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Pattern Mining To Unknown Word Extraction (10
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Pattern Mining to
Chinese Unknown word Extraction 資工碩三 955202037 楊傑程 2008/10/14
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Unknown Word Detection
& Extraction Unknown Word Detection (Detection Rule Mining) Judge Judge Unknown Word Extraction (Machine Learning- Classification) 8/10 corpus + detection tags (Initial Segmentation) 8/10 corpus 1/10 corpus (Validation) 1/10 corpus (Initial Segmentation) Classification Decision 1/10 corpus + detection tags training testing Phase 1 Phase 2 Rules 1/10 corpus (Validation) Mining tool (Prowl) Model POS tagging POS tagging
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EX: 3-gram Model
discard negative negative negative positive 運動會 () ‧ () 四年 () 甲班 () 王 (?) 姿 (?) 分 (?) ‧ () 本校 () 為 () 響 () 應 () 運動會 ‧ 四年 甲班 王 (?) ‧ 四年 甲班 王 (?) 姿 (?) 四年 甲班 王 (?) 姿 (?) 分 (?) 甲班 王 (?) 姿 (?) 分 (?) ‧ 王 (?) 姿 (?) 分 (?) ‧ 本校
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Ensemble Method Improvement
0.426 0.703 0.306 0.707 0.8 0.633 0.614 0.671 0.567 Censemble 0.336 0.59 0.238 0.66 0.765 0.583 0.594 0.653 0.544 Caverage 0.412 0.662 0.299 0.669 0.776 0.587 0.587 0.645 0.538 C12 0.335 0.554 0.24 0.667 0.74 0.607 0.593 0.668 0.533 C11 0.344 0.662 0.232 0.655 0.723 0.599 0.596 0.661 0.543 C10 0.321 0.635 0.215 0.645 0.715 0.587 0.598 0.657 0.548 C9 0.309 0.486 0.226 0.676 0.813 0.579 0.6 0.673 0.541 C8 0.325 0.703 0.211 0.648 0.691 0.611 0.604 0.66 0.557 C7 0.333 0.608 0.23 0.641 0.735 0.568 0.582 0.636 0.536 C6 0.299 0.554 0.205 0.644 0.779 0.549 0.603 0.66 0.555 C5 0.42 0.676 0.305 0.667 0.796 0.574 0.598 0.645 0.557 C4 0.28 0.378 0.222 0.664 0.81 0.563 0.58 0.633 0.535 C3 0.338 0.743 0.219 0.7 0.791 0.627 0.61 0.657 0.569 C2 0.315 0.419 0.252 0.649 0.808 0.542 0.572 0.64 0.518 C1 F1-Score Recall Precision F1-Score Recall Precision F1-Score Recall Precision 4-gram 3-gram 2-gram 分類 模型
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