• Title/Summary/Keyword: 유용조도

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항로표지용 고효율 충방조절기 효율 개선 연구

  • Yu, Yong-Su;Yeo, Ji-Min;Han, Ju-Seop;Kim, Jong-Uk
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2017.11a
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    • pp.218-219
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    • 2017
  • 등부표는 태양광발전을 이용한 독립형 전력계통시스템으로 일사량과 표면온도에 의한 태양광 발전효율 저하에 따른 등명기 소등 또는 광력 미약으로 항로표지에 대한 신뢰성 확보에 대한 문제점이 발생하고 있다, 국내 충방전조절기는 표준규격서에 따라 개발되고 있으나 충전제어방식은 대부분 PWM 제어 방식을 적용하여 개발되고 있어 충방전조저릭의 전력 효율 향상 등의 성능 개선을 추진할 필요가 있다. 본 연구에서는 충방전조절기의 성능 개선을 위하여 충전효율을 향상시키고 자체소비전력을 저감하는 기술을 개발하였다.

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Development the Program Calculating Illuminance and Luminace for Road Lighting (도로 조명에 의한 조도 및 휘도 분포 계산 프로그램 개발)

  • Kim, Gi-Hoon;Sim, Sang-Man;Kim, Hoon
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 1998.11a
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    • pp.49-54
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    • 1998
  • 본 연구에서는 도로 조명 설비에 있어서의 도로 면의 휘도 분포 및 조도 분포뿐만 아니라, 평균 휘도 및 평균 조도, 전반 균제도와 길이상의 균제도, 임계 증분, 광막휘도, 글레어 등의 계산을 수행하는 프로그램(Lighting Analysing Program for Road, LAPRoad)을 개발하였다. 도로 및 조명기구의 기하학적 배치와 함께 노면의 반사 특성과 조명기구의 배광 특성이 사용자의 선택에 의해 입력된다. 계산의 정확도와 LAPRoad의 유용성을 검증하기 위해 실제 조도와 휘도를 측정하고 이를 계산 결과의 비교하여 좋은 결과를 얻었다.

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Determination of Seed Protein and Oil Concentration in Kiddny Bean by Near Infrared Spectroscopic Analysis (근적외 분광분석법을 이용한 강낭콩 종실단백질 및 지방의 비파괴 분석)

  • 이한범;최병렬;강창성;김영호;최영진
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.46 no.3
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    • pp.248-252
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    • 2001
  • Near infrared spectroscopy (NIRS) is a rapid and accurate analytical method for determining the composition of agricultural products and feeds. An important merit of the NIRS analytical system is consistent predictions across instruments. However, proper calibration is the most important factor for a NIRS analytical system. Forty samples were obtained from Kyonggi-do Agricultural Research and Extension Services, and used to develop calibrations for crude protein content and crude oil content. Calibrations equations were developed using multiple linear regression (MLR). Accuracy and precision of NIRS predictions were adequate for quality measurement for the two constituents in kidney bean seed. In calibration sample sets (N=30), multiple correlation coefficient between NIR and lab measurements is 0.90 for seed, 0.97 for powder in seed protein concentration and 0.40 for seed and 0.92 for powder in seed oil concentration, respectively. It is concluded that NIRS method is suitable for the determination of seed composition in whole kidney bean.

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A Tile Evaluating Algorithm for Orthodoxy Mahjong Based on a Probability Theory (확률론에 근거한 정통 마작의 패 평가 알고리즘)

  • Kim, Sang-Jin
    • The Journal of the Korea Contents Association
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    • v.6 no.2
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    • pp.154-161
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    • 2006
  • We introduce a tile grading algorithm for orthodoxy mahjong game. Mahjong is one of most popular board game in the world. In Mahjong, the most important part of skill is the worthless tile selecting method from one's own hands and discard it. To get the value of the tiles in one's hands, at first, we generate every possible cho by using each overlapped tiles. Given these cho, we make the configurable candidate from one's own tiles. At last, we select the best candidate from the candidates and evaluate the tiles depend on usefulness of configuring the cho.

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ECO-Friendly Reservoir Tank Management using Prediction for Improved Water Quality (수질향상을 위해 예측을 이용한 환경 친화적인 저수조 관리)

  • Chung, Kyung-Yong;Jo, Sun-Moon
    • The Journal of the Korea Contents Association
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    • v.9 no.6
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    • pp.9-16
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    • 2009
  • According to the construction of infrastructure for the water resource management services, the importance of the eco-friendly reservoir tank management is being spotlighted. In this paper, we proposed the eco-friendly reservoir tank management using prediction for improving the water quality and on-line managing efforts of reservoir tanks. The proposed method defined the context and environment of the reservoir tank and predicted the profited service according to the pump motion, the solar battery, the chemicals, the water level, the telephone line, and the modem using collaborative filtering. To evaluate the performance of the eco-friendly reservoir tank management system using prediction, we conducted sample T-tests so as to verify usefulness. This evaluation found that the difference of satisfaction by service was statistically meaningful, and showed high satisfaction. Accordingly, the satisfaction and the quality of services will be improved the efficient prediction by supporting the context information as well as the environment information.