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소수력 발전용 한국형 공기주입식 고무댐 개발을 위한 유체-구조 연성 해석
황태규(Tae-Gyu Hwang),박재현(Jae-Hyoun Park),김정환(Jeong-Hwan Kim),김정렬(Jeong-Ryul Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
Inflatable rubber dams are used for controlling flood, impounding water for recreations, preventing beach erosions, diverting water for irrigations, and generating hydropower. They are long, flexible, inflated with air, cylindrical structures on a rigid horizontal foundation such as concrete. The dam is modeled as an elastic shell inflated with air. The mechanical behaviors of the inflated dam model were investigated by using the finite element method. The analysis process such as One Way Coupling Fluid-Structure Interaction consists of two steps. First, the influences of the fluid side were investigated, viz, the shape changes of the inflated rubber dam due to the fluid motions was captured when the height of the dam was 30㎝ with air pressure 0.01㎫, at which the pressure distributions over the surface of the dam were calculated. And next, the structural deformations were calculated using the pressure distributions. The initial inlet velocity for flow field was set to 0.1㎧. The structural deformation behaviors were investigated. The final research goal is to develop a Korean Inflatable Rubber Dam to be used for generating small hydropower.
소수력 발전용 한국형 공기주입식 고무댐 개발을 위한 유체-구조 연성 해석
황태규(Tae-Gyu Hwang),박재현(Jae-Hyoun Park),김정환(Jeong-Hwan Kim),김정렬(Jeong-Ryul Kim) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
Inflatable rubber dams are used for controlling flood, impounding water for recreations, preventing beach erosions, diverting water for irrigations, and generating hydropower. They are long, flexible, inflated with air, cylindrical structures on a rigid horizontal foundation such as concrete. The dam is modeled as an elastic shell inflated with air. The mechanical behaviors of the inflated dam model were investigated by using the finite element method. The analysis process such as One Way Coupling Fluid-Structure Interaction consists of two steps. First, the influences of the fluid side were investigated, viz, the shape changes of the inflated rubber dam due to the fluid motions was captured when the height of the dam was 30cm with air pressure 0.01MPa, at which the pressure distributions over the surface of the dam were calculated. And next, the structural deformations were calculated using the pressure distributions. The initial inlet velocity for flow field was set to 0.1m/s. The structural deformation behaviors were investigated. The final research goal is to develop a Korean Inflatable Rubber Dam to be used for generating small hydropower.
황태규(Tae-Gyu Hwang),김성권(Sung Kwon Kim) 한국정보과학회 2020 정보과학회 컴퓨팅의 실제 논문지 Vol.26 No.9
영화장르는 주제, 줄거리, 분위기 등이 요약된 특성이고, 같은 장르의 영화들은 비슷한 특성을 가지며, 영화 제작자나 전문가에 의해 영화장르가 분류된다. 사용자가 새로운 영화를 선택할 때, 영화장르로부터 유추된 내용을 바탕으로 의사결정하기 때문에, 영화장르는 선호도를 대표할 수 있는 중요한 단서가 된다. 기존의 방법은 영화장르 분석을 통해 추천 정확성을 향상시켰지만, 협업 필터링 기반의 평점예측으로 인해 복잡도가 크고, 영화분류에 사용된 매개변수 값에 따른 성능편차가 크기 때문에 모델의 최적화가 어려우며, 분류된 영화들의 조합으로 추천목록을 작성하기 때문에 인위적인 추천결과를 보였다. 본 논문에서는 제시된 문제해결을 위한 알고리즘을 제안하며, 실험을 통해 제시된 문제들이 해결됨을 확인할 수 있었다. Genres categorize movies and help summarize their themes, plots and moods. As such, movies of the same genre should have similar characteristics when they are classified by movie-makers or domain experts. When you choose a new movie, the genre becomes an important clue to match your preferences to something you haven’t seen before, basically it helps us make decisions based on analogy to previous movies we have seen in that genre. Although previous methods have improved recommendation accuracy through analysis of movie genre, recommending movies is a high complexity problem due to the collaborative filtering-based rating prediction used. Also, this model is difficult to optimize because of the large variation in performance according to the parameter values used in the movie classification, at the same time the recommended results are artificial because the recommendation list is written using a combination of classified movies. In this paper, we introduce new methods for solving the problems presented, and through experiments we show that our approach successfully solves these problems.
황태규(Tae-Gyu Hwang),박재현(Jae-Hyoun Park),김정환(Jeong-Hwan Kim),김정렬(Jeong-Ryul Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Inflatable rubber dams are used for controlling flood, impounding water for recreations, preventing beach erosions, diverting water for irrigations, and generating hydropower. They are long, flexible, inflated with air, cylindrical structures on a rigid horizontal foundation such as concrete. The dam is modeled as an elastic shell inflated with air. The mechanical behaviors of the inflated dam model were investigated by using the finite element method. The analysis process such as One Way Coupling Fluid-Structure Interaction consists of two steps. First, the influences of the fluid side were investigated, viz, the shape changes of the inflated rubber dam due to the fluid motions was captured when the height of the dam was 30㎝ with air pressure 0.01㎫, at which the pressure distributions over the surface of the dam were calculated. And next, the structural deformations were calculated using the pressure distributions. The initial inlet velocity for flow field was set to 0.1㎧. The structural deformation behaviors were investigated. The final research goal is to develop a Korean Inflatable Rubber Dam.