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능동학습을 통한 우수한 기계적 특성을 가지는 제올라이트 구조의 발견
김남중(Namjung Kim),민경민(Kyoungmin Min) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
In this work, a Bayesian active learning platform is developed for the accelerated discovery of mechanically superior zeolites structures from more than half a million hypothetical candidates. An initial database containing the mechanical properties of experimentally synthesizable zeolite structures was constructed to train the machine learning regression model. Then, a Bayesian optimization scheme is utilized to identify zeolites with potentially superior mechanical properties. The iteratively updated database consists of 876 labeled zeolite structures, and the uncertainty of the predictive model in terms of the standard deviation is reduced by 40% and 58% for the bulk and shear moduli, respectively. A rigorous study of the model convergence shows that no further improvement occurs after the 10th iteration in which labeled data is gradually added. The proposed platform is able to discover 23 new zeolite structures that have unprecedented shear moduli, including the superior shear modulus (127.81 GPa) which is 250% higher than those in the initial dataset. The proposed platform enhances the predictive accuracy of the mechanical properties of zeolites, and the proposed framework based on Bayesian active learning accelerates the material discovery process while maximizing computational efficiency.
김남중(Kim, NamJung) 고려대학교 한국학연구소 2020 한국학연구 Vol.74 No.-
이 글은 『제왕운기』에 언급된 단군본기의 성격과 저자 등을 다룬 것으로, 단군본기는 우리 민족이 단군의 후예라는 인식 확대에 기여한 책이다. 단군본기는 어느 정도 학식이 있으며 불교에도 조예가 깊은 인물의 글이다. 더불어 이승휴가 『제왕운기』를 편찬하면서 단군본기와 마찬가지로 구월산 일대의 단군 신앙만 채택하였고 평양과 고조선의 관계는 철저히 배제하였다는 점, 단군의 재위 기간을 일부러 틀리게 적어 단군본기 저자를 예우하고 있다는 점에서 단군본기 저자는 이승휴와 특별한 관계임을 알 수 있다. 이러한 점에서 단군본기는 류경(1211~1289)이 쓴 글임을 알 수 있다. 단군본기는 평양이 아닌 구월산 일대의 단군 신앙과 연결되어 있으며, 신라, 고구려를 포함한 우리 민족의 여러 세력이 모두 단군의 후예임을 밝힌 글로 12~13세기 고려 사회의 분열 의식 극복에 기여하였다. 또한 원에 넘어간 영토회복의 의지도 들어 있는데, 이는 류경의 대원 자주 의식이 반영된 것이다. This article deals with the character and author of dangunbongi quoted in jewang-ungi, dangunbongi is a book that contributed to the expansion of the perception that the korean people are descendants of dangun. Dangunbongi is written by a person who is somewhat learned and familiar with buddhism. In addition, in the process of compiling jewang-ungi, lee-seunghyu has adopted only the dangun faith in the guwol mountain area, thoroughly excluded the relationship between pyungyang and old joseon, as in the case of dangunbongi, and was honoring the author of dangunbongi by deliberately writing the period of his reign, we can see that the author of dangunbongi and lee-seunghyu were in a special relationship. In this regard, we can see that dangunbongi was written by ryu-gyeong(1211~1289). Dangunbongi is connected to the dangun faith in guwol mountain area, not pyungyang, and has contributed to overcoming the sense of division in golyeo society at the 12th and 13th centuries, revealing that all the forces of our people, including silla and gogulyeo, are descendants of dangun. It also includes a willingness to restore territory taken away by the won empire, reflecting ryu"s self-reliance in resisting won.