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이만형,Lee, Man-Hyung 한국정밀공학회 1992 한국정밀공학회지 Vol. No.
In this study, the technique of adaptive control based on certainty equivalence for the input-output linearization of nonlinear system is investigated. It is shown that the upper bound of the parameter estimation error can be represented more explicitly than Teel et al's works. Another direct approach, which stows that the adaptive input-output linearing control laws using the normalized identifier yield bounded tracing, is also presented.
이만형,백운보,이권순,Lee, Man-Hyung,Baek, Woon-Bo,Lee, Kwon-Soon 한국정밀공학회 1992 한국정밀공학회지 Vol. No.
The heavy vibrations of vehicles on the severe off-road environment degenerate the stabilization proformance of the gunner primary sight. To improve the stabilization performance, the dynamic equations of the gunner primary sight were derived, and the stabilization systems were designed using VSC methods. The performances were compared with the Lead/Lag scheme. In the nonlinear simulation including real disturb ances and couloumb friction, it is shown that the VSC methods exhibit more effective stabilization.
계층화 분석 방법(AHP)을 활용한 청주시 균형발전사업의 상대적 중요도 및 우선순위 분석
이만형(Man-Hyung Lee),전병윤(Byeong-Yun Jeon),최정석(Jeong-Seok Choi) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.10
본 연구의 목적은 계층화 분석 방법(AHP) 방법을 적용하여 통합 청주시에서 추진하는 균형발전 사업(특별회계)을 대상으로 중요도와 우선순위를 분석하고, 나아가 상위 30개 사업을 도출하여 정책적 시사점을 제시하는 데에 주어진다. 계층화 방법을 적용하기 위해서 청주시에서 추진 중인 균형발전 사업(특별회계)을 대상으로 상위 계층 요인과 하위 계층요인을 도출하였다. 분석의 주요 결과는 다음과 같다. 첫째, 균형발전 사업(특별회계)을 추진할 때에 효율성 측면에서 사업이 장기적으로 중단되는 경우보다는 원활하게 사업을 진행할 방안을 고려해야 한다. 둘째, 하위계층 요인에서 도시 · 생활시설(0.096)과 교통시설(0.093) 관련 요인에 대한 중요도에 따라서 지역주민들이 생활편의와 관련된 시설로서 생활 여건 개선과 도농 간 접근성을 높일 수 있는 교통시설 관련 사업을 고려해야 한다. 셋째, 청주시 구별로 균형발전 사업건수를 구분하면, 청원구가 17개(36%)로 가장 많았으며, 사업유형별로 도시 · 생활시설 사업이 유의미한 고용유발효과를 미친 것으로 분석되었다. This study primarily aims at analyzing the relative importance and priority of balanced development projects (Special accounts) implemented by the Consolidated Cheongju City. Applying Analytic Hierarchy Process (AHP) models, this study derived the top 30 projects and presented a series of policy implications. Both the upper and lower class factors were targeted for the balanced development projects (special account) carried out by Consolidated Cheongju City. The major findings are as follows: First of all, while promoting balanced development projects (special accounts), the government should consider various ways of realizing them more smoothly rather than suspending the project for a long time. Secondly, reflecting upon the importance of indices of urban living facilities (0.096) and transportation facilities (0.093), residents should consider ways to improve the living environment and upgrade accessibility between urban and rural areas. Thirdly, in terms of regional distribution, Cheongwon-gu accounted for 17 projects (36%). Among various project types, the highest number of projects are urban and living facilities projects, exerting a significant impact on employment.
논문 : 티타늄 음극기지의 양극산화 전해질 농도에 따른 구리전착층 표면 및 전기적 특성에 미치는 효과
이만형 ( Man Hyung Lee ),박은광 ( Eun Kwang Park ),우태규 ( Tae Gyu Woo ),박일송 ( Il Song Park ),윤영민 ( Young Min Yoon ),설경원 ( Kyeong Won Seol ) 대한금속재료학회 ( 구 대한금속학회 ) 2008 대한금속·재료학회지 Vol.46 No.11
Recently, the requirement for the ultra thin copper foil increases with smaller and miniaturized electronic components. Therefore, it is important to examine the surface state of substrate depending on the processing parameter during the anodic oxidation. This study investigated the effect of the various electrolyte concentrations on anodizing of titanium anode prior to copper electrodeposition. Different surface morphology of anodized titanium was obtained at different electrolytic concentration 0.5 M to 3.0 M. In addition, the effect that the surfaces and the electrical characteristics on the electrodeposited copper layer was observed. In this study, surface anodized in the group containing 0.5M H2SO4 shows more uniform copper crystals with low surface roughness. the surface roughness and sheet resistance for 0.5M H2SO4 group were 1.353 μm and 0.104 mΩ/sq, respectively.
공간분석 기법에 기초한 주거지역 공간특성과 주거침입범죄와의 관계분석
이만형(Lee Man-Hyung),김정섭(Kim Jung-Sup),석혜준(Seok Hye-June) 대한건축학회 2007 대한건축학회논문집 Vol.23 No.11
This research focuses on Crime Prevention through Environmental Design(CPTED) method which is recently introduced in Korea. In specific, it investigates context deduction between spatial characteristics and burglaries in residential areas. Its basic analysis tool depends on Space Syntax(SS). This study collects a series of police data on robbery and theft which would be regarded as housing invasion types. It also figures out the key functions of SS variables in terms of connectivity, control value, and integration. In a comparative perspective between crime occurrence sites and non-crime ones, it calculates mean values of SS-related variables using independent T-test. For the in-depth analyses, it matches crime occurrences with various building types. Furthermore, it applies ArcGIS to measure the distances from crime spots to street lights. When this study applies Space Syntax methods to crime occurrences, the average mean values at crime occurrence sites are higher than those at non-crime sites. It implies the fact that building’s main type is pivotal in controlling crime rates. Furthermore, neighborhood facilities with meager territoriality seem extremely vulnerable to crimes. In terms of single detached housing units, it reveals relatively weaker characters in the night-time crime occurrences than those in the day-time ones. In contrast, there exists positive relationship between the distance from street lights and the night-time crime occurrences. All of these indicators imply that the CPTED approach is relevant in designing defensible space in our cities.