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엄재근(J. G. Eom),정승원(S. W. Jeong),전만수(M. S. Jeon) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.5
In this paper, the metal flow lines in product design as well as in forging process design are emphasized with typical application examples. The prediction of metal flow lines using metal forming simulation technology is introduced with their characteristics. An experimental study shows that the metal flow lines have great influence on the structural rigidity of the product. We introduce various typical applications including the case of the severely cut metal flow lines during machining especially on the region where the periodically contacting forces are exerted, the case of abnormal distortion of metal flow lines which can cause the broken or ruined metal flow lines due to much elongation or hot shortness due to viscous heating and the case of the macrosegregation region which should be controlled not to be neighboring with the force bearing region. An example of weight reduction of an automobile part considering the improved metal flow lines is also introduced. These typical applications can give the process engineers the insight in conducting the automobile or mechanical parts design as well as in developing their related manufacturing processes.
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한국어 어절 자질들을 활용한 시퀀스 레이블링 기반 한국어 의존 구문 분석
조경철,허윤석,강상우 한국차세대컴퓨팅학회 2021 한국차세대컴퓨팅학회 논문지 Vol.17 No.2
의존 구문 분석은 문장의 지배소와 의존소 간의 관계를 추출하고, 이를 통해 문장의 문법적 구조 분석을 하는 자연 어 이해의 한 과정이다. 기존의 한국어 의존 구문분석 연구들은 높은 시간 복잡도를 가지는 알고리즘이나 별도의 자 료구조가 필요하다는 한계점을 가지고 있다. 본 논문에서는 한국어의 지배소 후위의 법칙에 근거하여 의존 구문분석 문제를 어절단위 문장 입력에 대하여 각 어절이 입력 문장 내에서 의존관계를 가지는 지배소와 의존관계명을 예측하 는 시퀀스 레이블링 문제로 간주한다. 그리고 본 논문에서는 어텐션 기반의 인코더-디코더 프레임워크를 활용하여 기존 연구의 한계점을 모두 고려한 새로운 한국어 의존 구문분석 모델을 제안한다. 또한 본 논문에서 여러 한국어 어절자질들을 한국어 의존 구문 분석에 적용하는 방법을 제안한다. 또한 효과적인 지배소 및 의존관계명 예측을 위 해 본 논문에서는 형태소 태그를 활용한 지배소의 상대적 위치 기반 레이블 인코딩 방법을 제안한다. 결과적으로 다 른 기존 모델들과 비교하여 제안 방법이 효과적임을 확인하였다. Dependency parsing is a process of natural language understanding that extracts the relationships between the head and its dependent in a sentence, analyzing the grammatical structure of the sentence. Existing studies on Korean dependency parsing have limitations in that complex algorithms algorithms with high time complexity or additional data structures are inevitably required. Based on the rule of head final of Korean, in this paper, dependency parsing can be regarded as a sequence labelling problem that predicts the head and its dependent of each word in the input sentence. Then, we propose a novel Korean dependent parsing model that consists of an attention-based encoderdecoder framework which has been shown to be outstanding on prevailing sequence labeling tasks. In addition, we propose a method of applying several eojeol feature to korean dependency parsing. In order to effectively predict the head and its dependent label, we also describe labeling encoding methods based on the relative position of head using part-of-speech tags. As a result, the proposed model has proved to be effective compared with other baseline approaches.
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박세제(S. J. Park),박준홍(J. H. Park),이경훈(K. H. Lee),김영환(Y. H. Kim),김병민(B. M. Kim),김동환(D. H. Kim) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
Recently, the amount of spring usage is on increase in the automotive and aircraft parts industry as well as home appliances. Manufacturing of spring is a need for diversification, specialized, mass production and high precision. Therefore it is very important to know the bending method and forming technique according to the shape of spring. In this study, to find the optimal bending method for the motor spring, the FE-simulation was executed using orthogonal array. The design parameters are exposed length, width of vibrate and feed rate. Then, the optimal combination of design parameters was suggested using ANN technique.
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딥드로잉 공정에서 공정변수에 따른 CR340/CFRP 복합재료의 에폭시 거동과 성형성평가
이민식(M. S. Lee),김성진(S. J. Kim),김현호(H. H. Kim),강충길(C. G. Kang) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.10
Recently, in automotive industry, there has been increasing demand for environment friendly materials for light-weight of vehicles to improve their safety and fuel efficiency and reduce environmental contamination. On the other hand, the weights of these types of vehicles have increased because of additional electronic devices, such as motors or batteries. To resolve these issues, it is necessary to develop parts for vehicles with good specific strength and specific stiffness. In this study, a hybrid composite material was fabricated by stacking CFRP on CR340 plates to increase the specific strength and specific stiffness instead of thick boron steel plates or DP steels, which have been used as reinforcing materials to improve the fracture toughness of the center pillar among vehicle parts.
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