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노출 편향 문제에 효과적인 대화 단위 RNN-CNN 기반의 화행 분석 시스템
윤정민(Jeongmin Yoon),고영중(Youngjoong Ko) Korean Institute of Information Scientists and Eng 2018 정보과학회논문지 Vol.45 No.9
The speech-act is the intention of the speaker in his or her utterance. Speech-act analysis classifies the speech-act about a given utterance. Recently, a lot of research based on machine learning using a corpus have been done. We have two goals in this study. First, the utterances in dialogue are continuative and organically related to each other, and the speech-act of a current utterance is greatly influenced by the direct previous utterance. Second, previous research did not deal with the exposure bias problem when the speech-act analysis model use the speech-act result of a previous utterance. In this paper, we suggest the RNN-CNN dialogue-level speech-act analysis model. We also experiment with the exposure bias problem. Finally, the RNN-CNN shows an 86.87% performance on the oracle condition and an 86.27% performance on the greedy condition.
위키피디아 기반의 효과적인 개체 링킹을 위한 NIL 개체 인식과 개체 연결 중의성 해소 방법
이호경(Hokyung Lee),안재현(Jaehyun An),윤정민(Jeongmin Yoon),배경만(Kyoungman Bae),고영중(Youngjoong Ko) Korean Institute of Information Scientists and Eng 2017 정보과학회논문지 Vol.44 No.8
Entity Linking find the meaning of an entity mention, which indicate the entity using different expressions, in a user’s query by linking the entity mention and the entity in the knowledge base. This task has four challenges, including the difficult knowledge base construction problem, multiple presentation of the entity mention, ambiguity of entity linking, and NIL entity recognition. In this paper, we first construct the entity name dictionary based on Wikipedia to build a knowledge base and solve the multiple presentation problem. We then propose various methods for NIL entity recognition and solve the ambiguity of entity linking by training the support vector machine based on several features, including the similarity of the context, semantic relevance, clue word score, named entity type similarity of the mansion, entity name matching score, and object popularity score. We sequentially use the proposed two methods based on the constructed knowledge base, to obtain the good performance in the entity linking. In the result of the experiment, our system achieved 83.66% and 90.81% F1 score, which is the performance of the NIL entity recognition to solve the ambiguity of the entity linking.