http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이화기(Hwa-Ki Lee),이홍희(Hong-Hee Lee),이성우(Sung-Woo Lee),이승우(Seung-Woo Lee) 한국산업경영시스템학회 2006 한국산업경영시스템학회지 Vol.29 No.3
Vehicle routing problem with time windows is determined each vehicle route in order to minimize the transportation costs. All delivery points in geography have various time restriction in camparision with the basic vehicle routing problem. Vechicle routing problem with time windows is known to be NP-hard, and it needs a lot of computing time to get the optimal solution, so that heuristics are more frequently developed than optimal algorithms. This study aims to develop a heuristic method which combines guided local search with a tabu search in order to minimize the transportation costs for the vehicle routing assignment and uses ILOG programming library to solve. The computational tests were performed using the benchmark problems.
가구설계 및 제조의 자동화를 위한 CAD/CAM 시스템의 개발
김기대(Ki Dae Kim),이화형(Hwa Hyoung Lee) 한국가구학회 1991 한국가구학회지 Vol.2 No.2
In this study, the CAD/CAM system for furniture design and manufacturing was developed for the purpose of increasing efficiency of manufacturing process that has attracted special interest recently.<br/> A drawing was made and a DXF file was generated by the existing AutoCAD. The AutoCAM that was developed in this study could read the DXF file from the AutoCAD and generated consecutively the NC program by selecting various elements and transmitted it to the CNC controller in the CNC router system. The CNC router system was successfully operated according to the NC program. The AutoCAM program was made by the QuickBASIC.<br/> As a result of the experiment, it is expected there are little difficulties in the application to the practical works.
이동환경에서 연속미디어 서비스를 위한 협력적인 프록시 캐슁
이승원,이화세,박성호,정기동,Lee Seung-Won,Lee Hwa-Sei,Park Seong-Ho,Chung Ki-Dong 한국정보처리학회 2004 정보처리학회논문지B Vol.11 No.6
본 연구는 이동환경에서 연속 미디어 객체에 대한 사용자 요구들에 대하여 효율적으로 자원을 관리하기 위하여, 사용자의 이동성 정보를 반영하는 협력적 프록시 캐슁 정책을 제안한다. 제안된 정책은 담당영역 내에서 사용자의 요구들을 참조함으로서 캐슁하는 기존의 프록시 캐슁정책과는 다르게 인접한 영역의 많은 사용자 요구 정보들을 이용하여 캐슁 객체를 선택함으로써 이동환경에서 발생하는 사용자들의 랜덤 액세스 요구들을 충분히 반영할 수 있도록 한다. 그리고 제안된 캐슁 정책을 위해서 각 프록시에서 발생한 요구 정보의 가중치와 재생량을 기반으로 하는 재배치 기법을 제안한다. 그래서 객체단위와 세그먼트 단위로 재배치 기법을 수행하여 결과를 평가하고 캐슁 정책의 성능을 분석하였다. 그 결과, 이동환경에서 적절한 사용자의 이동성 비율이 협력적 캐슁의 성능에 영향을 미치는 중요한 요인이 된다는 것을 알았다. This paper proposes a user's mobility based cooperative proxy caching policy for effective resource management of continuous media objects in mobile environments. This policy is different from the existing proxy caching policies in terms of how to exploit users' mobility. In other words, existing caching policies work based on the information about objects by referring to user's requests within a specified domain whereas the proposed caching policy runs by utilizing a number of user's requests across several domains. So, the proposed policy is applicable to random requests in mobile environments Moreover, we also propose a replacement policy based on weights and playback time. To check the efficiency of the proposed caching policy, the proposed replacement policy is run with different size of caching unit object or segment. The result of performance analyze tells what a ratio of user's mobility is are major factors for the efficient operation of the cooperative caching.
김지문,이화형,권기원,송호경 ( Ji Moon Kim,Hwa Hyung Lee,Ki Won Kwon,Ho Kyong Song ) 한국산림과학회 1980 한국산림과학회지 Vol.46 No.1
This study was carried out to examine the substitution possibility into fiber pot instead of Jiffy pot for the good transplanting. Fiber pot was made of fiber, wood waste particle, and bark powder (10% of the particle weight) and also latex was added into the furnish as a binder. The pots were sprayed with just enough urea solution to prevent nitrogen deficiency of pot media coming from the breakdown of wood fiber in the pot wan during the plant growing. The utility of fiber pot was compared with that of Jiffy pot in the service test of two tree species under a green-house condition. The results obtained can be summarized as follows ; 1. Fiber pot made of 30% wood fiber+7O% particle including 10% of bark powder, and 3%-latex has shown a good results like that of Jiffy pot in the sp. gr., tear factor and burst factor. For water absorption, fiber pot made of 50% fiber+50% particle, and 3%-latex got the best result. In the consideration of the above physical and mechanical properties of the fiber pot for good root penetration through the pot wall and facile handling, fiber pot made of 30% fiber+70% particle, and 3%-latex may be seemed to be good. 2. There were no harms in sapling growth in fiber pot as well as in Jiffy pot. The root penetration ability through the fiber pot was slightly inferior to that of Jiffy pot, and yet the pot damage through transportation seemed to be slighter in fiber pot than in Jiffy pot.