• 디지털콘텐츠학회 논문지
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• 제9권4호
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• pp.751-758
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• 2008

본 논문은 3D 그래픽 기술을 활용하여 사용자의 실제 모습과 같은 3D 얼굴 모델을 구현하고, 구현된 얼굴 모델을 활용하여 성형 시술 전과 후를 가상으로 비교함으로 성형수혜자의 만족도를 높이는 응용프로그램인 3D 가상 얼굴 성형 시스템에 대한 연구 및 구현이다. 사용자의 실물과 최대한 유사한 원형 3D 얼굴 모델링 제작을 위한 3D 모델링 기법과 피부를 표현하는 맵핑 기법, 그리고 데이터베이스 시스템을 사용한 얼굴 데이터의 저장 및 사용자 맞춤 가이드 시스템을 구현한다. 또한, 세부적인 미세 조정을 위한 변형 Controller를 구현하여 얼굴의 미세한 변화를 나타낼 수 있다. 본 논문에서 구현한 3D 얼굴 성형 시스템은 성형외과 등에서 사용되고 있는 이미지를 활용한 시스템에 비하여 정확성, 편리성, 만족도가 높은 결과를 보여주고 있다.

• 한국멀티미디어학회논문지
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• 제12권5호
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• pp.737-744
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• 2009

본 논문은 한국 표준 얼굴 데이터를 바탕으로 제작한 3D 얼굴 모델을 활용하여 성형 수술 전후의 모습을 비교하여 성형 수술의 만족도를 높이는 웅용 프로그랭인 3D 가장 얼굴 성형 시스댐에 대한 연구 및 구현이다. 이 연구를 위하여 2D 개인 얼굴 이미지와 3D 한국인 표준 모델을 활용하여, 2D 이미지 상의 사용자의 실제 얼굴과 똑같은 3D 얼굴 모델을 구현한다. 본 연구에서 제안하는 3D 가상 얼굴 성형 시스템은 얼굴 모텔의 기본이 되는 3D 한국인 표준 얼굴 모델에 2D 개인 얼굴 이미지로부터 추출한 개인 특성 정보를 적용함으로서 3D 얼굴 모델링 시스템을 구현하고 3D 얼굴의 사실성올 높이는 텍스처 맴핑 및 구축된 얼굴을 활용하여 성형 수술 후의 얼굴의 변화를 나타내는 3D 얼굴 성형 시스댐 등으로 구성되어 있다. 제안된 3D 가상 얼굴 성형 시스템은 정확한 개인 얼굴 모델링 방법을 제공하고, 성형 전후의 얼굴을 미세하게 조정하는 기능을 부여함으로써 현존하는 유사 시스템에 비교하여 성형 수술의 만족도와 안정성을 높이는 결과를 나타내었다.

• 산업기술연구
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• 제22권B호
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• pp.241-249
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• 2002

Optical fiber is indispensable for optical communication systems that transmit large volumes of data at high speed, but super precision technology in sub-micron units is required for optical axis adjustment. We developed the automatic optical fiber by image processing and automatic loading system. we have developed 6-axis micro stage system for I/O optical fiber arrays, the initial automatic aligning system software for a input optical array by the image processing technique, fast I/O-synchronous aligning strategy, the automatic loading/unloading system and the automatic UV bonding mechanism. In order to adjust the alignment it used on PC based motion controller, a $10{\mu}m$ repeat-detailed drawing of automatic loading system is developed by a primary line up for high detailed drawing. Also, at this researches used the image processing system and algorithm instead of the existing a primary hand-line up and fiber input array and waveguide chip formed in line by automatic.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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• pp.83-86
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• 1995

This paper proposes an auto-tuning method of feedforward signal in boiler control of thermal power plants by using the neural network. The neural network produces an optimal feedforward signal by tuning the weights of the network. The weights are adapted effectively by using the teaching signal of PI control output. The proposed method was evaluated based on a detailed simulator which expressed non-linear characteristics of the 600 MW actual thermal power plant at load chaning operations, showed effectiveness in the learning of the weights of the neural network, and gave an accurate control performance in the temperature control of the system. Through the evaluation, the proposed method was proved to be effectively applicable to the actual thermal plants as the automatic adjustment tool.

• Journal of Power Electronics
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• 제18권1호
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• pp.34-44
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• 2018

This paper presents a pulse-width adjustment (PWA) strategy for a novel bidirectional DC-DC boost converter to improve the performance of the dynamic inductor current response. This novel converter consists of three main components: a full-bridge converter (FBC), a high-frequency isolated transformer with large leakage inductance, and a three-level voltage-doubler rectifier (VDR). A number of scholars have analyzed the principles, such as the soft-switching performance and high-efficiency characteristic, of this converter based on pulse-width modulation plus phase-shift (PPS) control. It turns out that this converter is suitable for energy storage applications and exhibits good performance. However, the dynamic inductor current response processes of control variable adjustment is not analyzed in this converter. In fact, dc component may occur in the inductor current during its dynamic response process, which can influence the stability and reliability of the converter system. The dynamic responses under different operating modes of a conventional feedforward control are discussed in this paper. And a PWA strategy is proposed to enhance the dynamic inductor current response performance of the converter. This paper gives a detailed design and implementation of the PWA strategy. The proposed strategy is verified through a series of simulation and experimental results.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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• pp.536-539
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• 2002

In this paper, we developed the automatic optical fiber aligner by image processing and automatic loading system. Optical fiber is indispensable for optical communication systems that transmit large volumes of data at high speed, but super-precision technology in sub-micron units is required for optical axis adjustment, we have developed 6-axis micro stage system for I/O optical fiber arrays, the initial automatic aligning system/software for a input optical array by the image processing technique, fast I/O-synchronous aligning strategy, the automatic loading/unloading system and the automatic UV bonding mechanism. In order to adjust the alignment it used on PC based motion controller, a $10\mu\textrm{mm}$ repeat-detailed drawing of automatic loading system is developed by a primary line up for high detailed drawing. Also, at this researches used the image processing system and algorithm instead of the existing a primary hand-line up. and fiber input array and waveguide chip formed in line by automatic. Therefore, the developed and manufactured optical aligning system in this research fulfills the great role of support industry for major electronics manufacturers, telecommunications companies, universities, government agencies and other research institutions.

• KIEAE Journal
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• 제1권2호
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• pp.63-70
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• 2001

With environmental problems and pollutions accumulated by continuous towns or cities developments events, it is becoming necessary to develop in consideration of environmental effects. This consensus leads to prepare a plan system and instrument for ecological city development, which can be a series of planning indicators. To develope a series of process for environmental friendly development, this study has three main goals as follows; development of policies and programs for environmental friendly development, suggestion of environmental friendly urban design models and standards, development of planning indicators and design guidelines Korean land use plan is operated by both zoning system and detailed plan system. But the available kinds of zoning type are too limited to apply to various and vernacular places. In addition to, the detailed plan is understood to be another regulation which constricts the freedom of building right. In this study, Plan System of Environmentally Friendly Space was studied for domestic affairs In German, Plan System of Environmentally Friendly Space is the field have been progressed before. so In this study, example of German was researched intensively, and Plan System of Environmentally Friendly Space was developed, applicable for the real state in domestic. This study was focused on methodology of landscape planning and planning for afforestation. Landscape planning is performed on condition detail investigation of existent state of nature and local characteristic, and Investigation of Planning for afforestation is more detailed than that of Landscape planning. In the basis of methodology of landscape planning and planning for afforestation, Plan for Environmentally Friendly Urban Habitation Model was developed. Plan for Environmentally Friendly Urban Habitation Model was applicable for state of land use planning. Site was selected Chuk-chun in city yang-in, taking the circumstances into consideration. So landscape planning correspond to land use planning was made out. Adjustment of Land use planning and Landscape planning was very important. Undergoing this process, Plan for Environmentally Friendly Urban Habitation Model was performed.

• KIEAE Journal
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• 제9권1호
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• pp.3-10
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• 2009

There are more interests and studies to change the buildings into eco-friendly spaces as the present age recognizes nature-friendly environment more and more. In response to this trend, the government reinforces regulations for the variety of the eco-friendly buildings using a certification system. The eco-friendly certification system which was started only for residing since 2002, and this has been now for schools that are the spaces of the students who will lead the future since March 2005. The purpose of this study is to help understanding of the eco-friendly buildings, and to popularize and activate those as developing and making up for the classification system, evaluation items, detailed standards to evaluate them more precisely by analysing eco-friendly planning features and data of the eco-friendly certificated schools. This study selected 15 eco-friendly certified schools among the schools certified by the Ministry of Land, Transport, and Maritime Affaires since 2005, and analyzed evaluation result. After the analysis, I had a thorough grasp of the point distribution of the each building, analyzed the cause of the low points or no points, and tried to find the improvements. There should be continuing adjustment and complement for the evaluation items and detailed standards, and these should be applied to models as well as certified schools. Active public relations are also needed to educate the public and elevate their participation.

• 한국건축시공학회지
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• 제4권4호
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• pp.117-126
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• 2004

Construction industry is faced with the problems such as the quickly changeable circumstance and increasing construction companies due to regulation mollification of company registration. In order to overcome these problems, new estimation system based on historical estimation cost is ready to introduce by government step by step. But the time of transition for estimation system causes another problems such as chaos addition to simultaneity of a standard of estimation system and new estimation system, lack of related regulation, accumulation of historical extensive cost data, and adjustment methodology when historical estimation data is applied to next projects. The purpose of this study is to suggest the change factors by activities for estimating historical cost for apartment housing projects. New estimation system is based on historical construction data. For application of this system, the standard adjustment methodology system is necessary. and extensive cost data should be accumulated under an unified construction work classification system. Therefore in this study, according to the construction work classification system, every apartment housing project was classified to 16 work classifications, and 7 major composed items which occupy more than 85% of construction costs are analyzed by detailed activities and by average ratio and maximum ratio each of them. In the result of the study, furniture work, foundation work and masonry work are the works which have big gap of costs between average ration and maximum ratio. In addition to suggestion of change factor by work species, 5 qualified construction specialists are interviewed and change factors in 7 major works are analyzed.

• 전력전자학회논문지
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• 제11권2호
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• pp.184-191
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• 2006

본 논문은 HVDC 시스템의 고장분석과 제어게인 파라미터정정에 대한 내용을 다루고 있다. 본 논문에서 다루는 내용은 정류실패에 의한 과전압에 의해서 유발된 실제의 케이블 사고를 다룬다. 그리고 고장을 분석하기 위해서 샘플링 타임이 50us인 정밀 PSCAD/EMTDC Model을 이용하였으며, 최종적으로 분석결과에 의해 HVDC시스템의 제어 파라미터가 정정되었다.