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박상근(Sangkun Park) (사)한국CDE학회 2021 한국CDE학회 논문집 Vol.26 No.2
This paper proposes a 3D image augmentation method for improving the generalization performance of deep neural networks. It allows us to enrich the diversity of training data samples that is essential in medical image segmentation tasks, thus reducing the data overfitting problem caused by the fact the scale of medical image dataset is typically smaller. It also enables us to predict medical segmentation surfaces in Euclidean space without additional labeled datasets. This method includes image transformation functions, which are comprised of a spatial deformation and image intensity change, enabling the synthesis of complex effects such as variations in anatomy and image acquisition procedures. Our numerical experiments demonstrate that the proposed approach provides significant improvements over state-of-the-art methods for 3D medical image segmentation.
인허가관련 설계품질검토 자동화를 위한 건축법규 문장 관계논리에 관한 연구
김현정(Hyunjung Kim),이진국(Jin-Kook Lee) (사)한국CDE학회 2016 한국CDE학회 논문집 Vol.21 No.4
This paper aims to define the relational logic of in-between code articles as well as within atomic sentences in Korean Building Code, as an intermediate research and development process for the automated building permit system of Korea. The approach depicted in this paper enables the software developers to figure out the logical relations in order to compose KBimCode and its databases. KBimCode is a computer-readable form of Korean Building Code sentences based on a logic rule-based mechanism. Two types of relational logic definition are described in this paper. First type is a logic definition of relation between code sentences. Due to the complexity of Korean Building code structure that consists of decree, regulation or ordinance, an intensive analysis of sentence relations has been performed. Code sentences have a relation based on delegation or reference each other. Another type is a relational logic definition in a code sentence based on translated atomic sentence(TAS) which is an explicit form of atomic sentence(AS). The analysis has been performed because the natural language has intrinsic ambiguity which hinders interpreting embedded meaning of Building Code. Thus, both analyses have been conducted for capturing accurate meaning of building permit-related requirements as a part of the logic rule-based mechanism.
한국인의 인체측정 데이터를 이용한 파라메트릭 인체분절모델 생성
구본열(Bon-Yeol Koo),최명환(Myeong-Hwan Choi),채제옥(Je-Wook Chae),김재정(Jay-Jung Kim) (사)한국CDE학회 2011 한국CDE학회 논문집 Vol.16 No.6
In this paper, we propose a methodology of generating a parametric segment model for human body using the Korean anthropometric data. The model is defined as an articulated body model consisted with 19 ellipsoid primitives. The primitives are joined at locations representing the physical joints of human body. A lot of previous researches have suggested methodologies of generating body models using the European or American anthropometric data, so that these models were inappropriate for engineering analyses and simulations in case of the Koreans. We defined a set of 35 body dimensions representing our segment model based on the anthropometric data of Koreans. Also we defined four key parameters of age, height, weight and waist circumference, and then we applied regression equations to associate the parameters to the aforementioned dimensions. As the results, we obtained the parametric human body segment models according to the various body types and the subject-specific models for a specific individual. The models in the various industries can be used as the base models for static and dynamic analysis considering the Koreans.
BIM 기반 건축정보 구축 및 활용을 위한 한국형 정보표현수준에 관한 연구
박소현(Sohyun Park),한지수(Jisu Han),조찬원(Chanwon Jo) (사)한국CDE학회 2018 한국CDE학회 논문집 Vol.23 No.3
Recently, as the construction industry has become larger, more complex, and more sophisticated, efficient use of construction information has become important. Therefore, BIM (Building Information Modeling) is introduced to improve the limitations and problems of existing 2D drawing work, integrating information using 3D information technology, and carrying out complete construction work. In order to achieve this, a common promise is required between each stage and each field of the building work, and a detailed plan for establishing Building information level (BIL) as a whole viewpoint and sharing and utilizing concrete information among the respective bodies is needed. In this study, the BIM-based building process is established by establishing the Building information level reflecting the design process according to the domestic situation. The scope of the study is centered on the design stage and clearly defined division of labor and environment In order to improve the quality of life.