• Title/Summary/Keyword: photo simulation

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Development of a High Efficiency Photo Voltaic Inverter System With Using Regenerative Power of Elevator (엘리베이터의 회생 전력을 이용한 고효율 태양 광 연계형 인버터 개발)

  • Cho, Su-Eog
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.11a
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    • pp.31-37
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    • 2007
  • The generation cost of photo voltaic is the most expensive among the renewable energy. To reduce the generation cost of photo voltaic, the proposed method added the regeneration power of elevator. Therefore we have the simulation results the proposed method is 60[%] higher than the previous photo voltaic generation for efficiency of generation.

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Enhanced Light Outcoupling on Photo-luminescent Devices with Microcavity (Microcavity 적용 광자 발광 소자의 광 추출 향상 연구)

  • Lee, Han Byul;Lee, Eun Hye;Sung, Min Ho;Ryu, Si Hong;Lee, Seong Eui
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.5
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    • pp.391-396
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    • 2013
  • Recently, microcavity is studied to reduce the optical loss of BLU and OLED. In this paper, we suggest applying microcavity to photo-luminescent lamp with plasma discharge technology to meet the display applications for a BLU for LCD. The structure of photo-luminescent lamp consists of SUS foil and ITO glass with microcavity. The opto-electric characteristics of photo-luminescent lamp with microcavity was evaluated. The brightness of photo-luminescent device was increased over $111cd/m^2$ with the adaptation of patterned microcavity at $30{\mu}m$. The 3D optical simulation verified the enhanced light outcoupling when microcavity applied to the device.

A numerical study on micro leakage behaviors at cavity edge during photo reaction injection molding (광반응사출성형 시 캐비티 엣지에서 발생하는 미세누출현상에 관한 해석적 연구)

  • La, Moon-woo
    • Design & Manufacturing
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    • v.10 no.3
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    • pp.8-13
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    • 2016
  • Despite technological advance, there have been several troubles in photo reaction injection molding (photo RIM) to produce ultra thin light guide panels (LGPs). In this study, micro leakage problem at cavity edge during photo RIM was investigated numerically. In order to obtain optimal processing conditions, we regulated inlet pressure of injected resin at the cavity edge and figured out micro leakage behaviors. At low inlet pressure (less than 100 Pa), though the micro leakage problem was not occurred, another problem, short shot due to not enough driving force, was appeared More than 1,000 Pa of the inlet pressure, injected resin was rapidly leaked through the micro gap at the cavity edge. Finally, we obtained optimal inlet pressure around 600 ~ 1,000 Pa. At this region, injected resin fully filled the cavity without micro leakage behavior. Based on the present study, further comparative investigations with experimental photo RIM should be performed to find optimal processing conditions for produce ultra thin LGPs.

Process Simulation for Recovery and Recycling of Waste Chemicals Produced from Semiconductor and LCD Photo Processes (반도체 및 LCD photo 공정에서 발생되는 폐chemical의 재자원화를 위한 공정모사)

  • 유홍진;이윤배;신재식;한성록
    • Proceedings of the KAIS Fall Conference
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    • 2002.05a
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    • pp.127-129
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    • 2002
  • 본 연구는 반도체 및 LCD Photo 공정에서 발생되는 폐액의 재자원화를 위한 공정설계 data와 재자원화 기술의 성능향상을 위한 기초 자료를 제공하는데 있다. 재자원화 증류탑의 설계를 위한 공정모사를 통하여 공정폐액 재자원화의 최적조건을 설계할 수 있는 기초자료를 제안하였다.

Photo Diode and Pixel Modeling for CMOS Image Sensor SPICE Circuit Analysis (CMOS 이미지센서 SPICE 회로 해석을 위한 포토다이오드 및 픽셀 모델링)

  • Kim, Ji-Man;Jung, Jin-Woo;Kwon, Bo-Min;Park, Ju-Hong;Park, Yong-Su;Lee, Je-Won;Song, Han-Jung
    • 전자공학회논문지 IE
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    • v.46 no.4
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    • pp.8-15
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    • 2009
  • In this paper, we are indicated CMOS Image sensor circuit SPICE analysis for the Photo Diode and pixel Modeling. We get a characteristic of the photoelectric current using a device simulator Medici and develop the Photodiode model for applying a SPICE simulation. For verifying the result, We compared the result of SPICE simulation with the result of mixed mode simulation about the testing circuit structure consisted photodiode and NMOS.

The Image and Preference Comparison between 'Opened Landscape' and 'Filtered Landscape' - Focused on With and Without Parallax Effect - ('열린경관'과 '가려진경관'의 이미지와 선호도 비교 - 패럴랙스(Parallax) 효과 유무를 중심으로 -)

  • Rho, Jae-Hyun
    • Journal of the Korean Institute of Landscape Architecture
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    • v.35 no.4
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    • pp.105-118
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    • 2007
  • The purpose of this study is not only to compare between 'Opened Landscape' and 'Filtered Landscape' image and preference but also to suggests a guide line of planting design for progressive realization. For this, the image structures of photo-sketch simulation for parallax landscape have been investigated by Semantic Differential scale(S.D. scale) and the Factor analysis. The results could be summarized as follows. The results of S.D. scale values for landscape through parallax were greater than non-parallax landscape. The scenes through parallax were better preferred to direct view. Thus the results of photo-sketch simulation test support the expected hypothesis that the visual environment of complexity and variety is closely correlated with the parallax effect and monotonous or non-parallax environment, and parallax effect on close view more bigger than the distant view. Factors covering the spatial image of parallax landscape were found to be seven and Total values were 60.35 %. The most important factors determining the parallax effect were Factors I 'depth of space' and VI 'expectation of space and interest'. An outstanding view must be handled properly to be preserved or accentuated. In this sense, the parallax spatial beauty with tree could be improved through the visual aspects of plan arrangements and the progressive realization appeared to be one effective design technique for landscape planning and design.

Photo Retrieval System using Combination of Smart Sensor and Visual Descriptor (스마트 센서와 시각적 기술자를 결합한 사진 검색 시스템)

  • Lee, Yong-Hwan;Kim, Heung-Jun
    • Journal of the Semiconductor & Display Technology
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    • v.13 no.2
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    • pp.45-52
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    • 2014
  • This paper proposes an efficient photo retrieval system that automatically indexes for searching of relevant images, using a combination of geo-coded information, direction/location of image capture device and content-based visual features. A photo image is labeled with its GPS (Global Positioning System) coordinates and direction of the camera view at the moment of capture, and the label leads to generate a geo-spatial index with three core elements of latitude, longitude and viewing direction. Then, content-based visual features are extracted and combined with the geo-spatial information, for indexing and retrieving the photo images. For user's querying process, the proposed method adopts two steps as a progressive approach, filtering the relevant subset prior to use a content-based ranking function. To evaluate the performance of the proposed scheme, we assess the simulation performance in terms of average precision and F-score, using a natural photo collection. Comparing the proposed approach to retrieve using only visual features, an improvement of 20.8% was observed. The experimental results show that the proposed method exhibited a significant enhancement of around 7.2% in retrieval effectiveness, compared to previous work. These results reveal that a combination of context and content analysis is markedly more efficient and meaningful that using only visual feature for image search.

Coordinated Droop Control for Stand-alone DC Micro-grid

  • Kim, Hyun-Jun;Lee, Yoon-Seok;Kim, Jae-Hyuk;Han, Byung-Moon
    • Journal of Electrical Engineering and Technology
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    • v.9 no.3
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    • pp.1072-1079
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    • 2014
  • This paper introduces a coordinated droop control for the stand-alone DC micro-grid, which is composed of photo-voltaic generator, wind power generator, engine generator, and battery storage with SOC (state of charge) management system. The operation of stand-alone DC micro-grid with the coordinated droop control was analyzed with computer simulation. Based on simulation results, a hardware simulator was built and tested to analyze the performance of proposed system. The developed simulation model and hardware simulator can be utilized to design the actual stand-alone DC micro-grid and to analyze its performance. The coordinated droop control can improve the reliability and efficiency of the stand-alone DC micro-grid.

A Study on the 0-Dimensional Simulation of He+Ne+Xe Gas and the Discharge Characteristics in Plasma Display Panel (플라즈마 디스플레이 패널용 He+Ne+Xe 혼합가스에서 소량 Xe 함유에 대한 영 차원 수치해석과 방전특성연구)

  • Jeong, Hae-Yeong;Choe, Hun-Yeong;Kim, Geun-Su;Kim, Seong-Ik;Song, Bong-Sik;Park, Heon-Geon;Lee, Seok-Hyeon
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.51 no.9
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    • pp.436-442
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    • 2002
  • Recently color AC PDP(plasma display panel) technology is rapidly improved. However, the luminous efficiency improvement is a key issue for making plasma display into a large-area flat display. In this paper, we suggest a new concentration of Xe in He-Ne-Xe gas mixture in order to achieve a high luminous efficiency of color AC PDPs. We calculated the densities of 25 species as a function of the time zero dimensional simulation using CVODE solver and we compared the results of zero dimensional simulation with a measurement of photo wave brightness and luminous efficiency, in order to find the optimum mixing condition of He-Ne-Xe gas in color plasma display panel. We obtained a high discharge speed under Xe mixing ratio of 1% by simulation and confirmed that through measuring photo wave.

Automatic Detection of Interstitial Lung Disease using Neural Network

  • Kouda, Takaharu;Kondo, Hiroshi
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.2 no.1
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    • pp.15-19
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    • 2002
  • Automatic detection of interstitial lung disease using Neural Network is presented. The rounded opacities in the pneumoconiosis X-ray photo are picked up quickly by a back propagation (BP) neural network with several typical training patterns. The training patterns from 0.6 mm ${\O}$ to 4.0 mm ${\O}$ are made by simple circles. The total evaluation is done from the size and figure categorization. Mary simulation examples show that the proposed method gives much reliable result than traditional ones.