http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이호철(Hocheol Lee),이문걸(Moongul Lee) 육군사관학교 화랑대연구소 2021 한국군사학논집 Vol.77 No.3
Currently, Korea Navy and Coast Guard are conducting search and patrol operations in Korean territorial seas based on their experiences and intuitions from now on. However, these operations have failed frequently due to the characteristics of small targets(like small ship or boat etc), and have caused many arguments and restrictions for search and detection operations. Usually, search operations of small targets have many constraints. The search operations work only if weapon systems such as radar and electro-optical/infra-red equipment reach close to small targets. In this study, we propose an effective search model based on MDP(Markov Decision Process) for limited search spaces and small targets. In addition, we consider realistic maritime environmental characteristics such as fishing nets, sea routes of moving large commercial ship, submerged rock, lighthouse and so on in this model. The various experimental results show that the detection probability of proposed model is significantly better than that of a random search model. We are looking forward to applying this scientific search model for the Korea Navy maritime operation planners.
이호철(Hocheol Lee) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
In this paper, an optics polishing technology using the adaptive eccentric motion mechanism was suggested. Optics polishing needs high reflective surface and high accurate form of the part. Therefore, versatile optics polishing mechanism has been tried to make a goal according to the optics geometric shapes. A polishing process based on the eccentric motion mechanism has been also implemented to manufacture the ophthalmic lens mold. Ophthalmic lens mold factory needs a number of spherical radius of polishing tool to make each different mold shape to correct eye diopters. Adaptive tool concept of an airbag polishing method was tried and experimented without polishing tool jigs to get the manufacturing goals.
이호철(Hocheol Lee),박정완(Jeongwan Park) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
Our study for the high speed machining of the custom titanium abutment was experimentally performed. The initial drawings for the STL file format was acquired. Tool path generation for the index table and the 3-axis milling machining center with high speed spindle was used considering the tool breakage with tungsten carbide tool of diameter 3mm. The maximum feed rate of 2,600㎜/min and a maximum spindle rpm of 40,000rpm. The machined abutment has the surface roughness of Ra 0.33 ㎛ while the total machining time is less than 1 hour.
〈논문〉 누진형 광학 렌즈의 곡률 변화 곡선 설계 기법 연구
이호철(Hocheol Lee),김도현(Dohyun Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5
We show a design technique in the progressive optical surfaces. Optical surface needs sometimes free form surface profile, which means a complex and progressive change in the curvature change. Therefore, the mathematical expression is made to satisfy a given curvature description. In this paper, a simple blending technique is suggested to connect two spherical surfaces with the radii of curvature.
이호철(Hocheol Lee) 한국스포츠교육학회 2020 한국스포츠교육학회지 Vol.27 No.2
본 연구의 목적은 2015 개정 교육과정에 따른 초등학교 체육과 검정교과서 내용의 정확성을 분석하여 향후 교과서 개발에 필요한 정보를 제공하는 것이다. 분석대상은 3,4학년 검정교과서로 8개의 출판사, 16종이며 분석 매트릭스(matrix)를 통한 질적 텍스트분석과 현직교사 5인으로 구성된 전문가협의를 거쳐 결과를 논의하였다. 연구결과 표지, 삽화와 사진과 관련된 표현지식의 정확성과 명제적, 개념이해 지식으로 명명한 내용지식의 정확성으로 범주화하였다. 표지를 포함한 사진과 삽화는 각 출판사마다의 개성을 바탕으로 학습자 친화적인 내용으로 구성하였으나, 일부 교과서에서는 정확한 운동지식과 3,4학년 학생들의 수준 이해를 간과한 경우가 있었다. 내용지식에서는 일상적으로 통용되는 건강과 운동에 대한 지식을 재고할 필요가 있었으며, 경기규정과 방법, 동작실행에 있어서 정확한 운동원리 등에 관한 오류를 발견할 수도 있었다. 놀이와 게임, 자유형과 크롤영법 등 다양한 용어의 개념에도 일관적인 타당성이 결여된 사례도 있었고 초등학생의 유산소운동 효과, 태권도의 태동과 의미 등과 같이 심도있는 논의가 필요한 면도 있었다. 또한 국가수준 교육과정과의 구체적인 연계방안과 체육과 교과역량과 영역간의 명확한 관계설정 등 보편타당한 개념적 이해가 공유되어야 할 필요가 있었다. 교과서의 구성과 내용은 초등현장 교육의 질을 결정하므로 체육과 검정교과서 개발 시 내용의 정확성은 반드시 재고되어야 한다. The purpose of this study was to analyze the accuracy and site compatibility of the contents of elementary school physical education revised for 2015 to provide information needed for the development of future textbooks. Analysis was conducted on 16 third and fourth grade authorized textbooks from 8 publishers and results were discussed after qualitative text analysis was conducted through an analytic matrix and expert consultations were made with 5 teachers in the elementary school. Research results categorized the accuracy of expressive knowledge related to covers, illustrations, and photographs and the accuracy of content knowledge designated as propositional, concept understanding knowledge. Photographs and illustrations including covers were composed of learner-friendly contents based on the individuality of each publisher but some textbooks overlooked accurate athletic knowledge and a level comprehension of third and fourth grade students. With content knowledge, considerations had to made of common knowledge on health and exercise used in daily life and errors were discovered on accurate exercise principles regarding game regulations, methods, and movement execution. There were also cases in which consistent validity was lacking in the concepts of diverse terms such as playing and games, freestyle and crawl-style swimming, and concepts of various terms such as the birth and meaning of Taekwondo. Also, universally valid conceptual understanding must be shared such as detailed connection systems with educational courses of a national level and clear relationship establishments among physical education, educational capacity, and domains. The composition and contents of textbooks determine the quality of elementary field training so content accuracy during physical education authorized textbook development must be taken into consideration.