• 한국태양에너지학회 논문집
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• 제39권2호
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• pp.33-43
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• 2019

In this study, reflecting long-term climate characteristics, we analyzed electricity generation and generation characteristics of 3kWp PV system, which was semi-integrated with air duct behind. Using PVsyst as a simulation analysis tool, we inputted "National reference standard weather data" of 16 regions as a typical climatic data. The result is summarized as follows: First, the national average annual electricity generation was 1,312 kWh/kWp (StDev, ${\sigma}=71$). It was most abundant in Mokpo with 1,434 kWh/kWp, which was average 21% greater than the lowest with 1,165 kWh/kWp in Seoul and 1,197 kWh/kWp in Jeju. National average daily generating time based on STC was 3.6 hours (${\sigma}=0.43$), and that of Mokpo and Seoul was 3.9 and 3.2 hours respectively. Second, Jeju showed the great difference of annual monthly generation by month (annual average = 99.7 kWh/kWp, ${\sigma}=25.5$), while Jinju showed the smallest difference (annual average = 115.5 kWh/kWp, ${\sigma}=10.6$). Generation in Jeju was at the largest in April with 132.2 kWh/kWp, which was 2.3 times greater than the lowest 55.2 kWh/kWp in January. However, generation in Jinju was at the largest in March with 129.3 kWh/kWp, which was only 1.3 times greater than the lowest 101.1 kWh/kWp in June. Third, the annual average PR was the highest in Incheon with 85.8% and the lowest in Jeju with 83.2%. PR of Mokpo was 84.3%, which was lower than that of national average.

• 한국전자통신학회논문지
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• 제6권3호
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• pp.381-387
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• 2011

광범위한 지역의 센서들로부터 데이터를 획득, 제어, 감시 등을 수행하는 계측제어기는 중앙 제어실과 유기적 관계를 유지한다. 그러므로 계측제어기는 유선망보다 무선망이 효율적이다. 그러나 무선망을 이용하게 되면 외부로부터 안전성에 커다란 문제가 발생된다. 그러므로 본 논문은 계측제어기의 네트워크 효율성을 증대시키기 위하여 계측제어 무선망에 적합한 MS-WP 암호시스템을 제안하였다. 제안된 MS-WP 암호시스템을 칩 레벨로 구현하여 모의실험을 수행한 결과, AES 알고리즘에 비하여 130% 처리율 증가 및 시스템 효율이 2배 증가됨을 확인하였다. 제안된 MS-WP 암호시스템은 보안성을 증대시키며 저전력화가 가능하고 처리속도가 빨라 계측제어기에 적합할 것이라 사료된다.

• 한국식품과학회지
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• 제31권1호
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• pp.246-251
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• 1999

다양한 유전형질을 갖고 있는 E. coli WP series, E. coli TK series 및 E. coli GW series 변이주들을 이용하여 chloropropanol의 변이원성 기구를 해석하였다. 3종류의 chloropropanol 모두 E. coli WP2s와 WP67에서는 돌연변이활성이 나타났으나 E. coli WP2와 CM611에서는 변이원성이 거의 나타나지 않았으며 2,3-DCP>3-MCPD>1,3-DCP 순으로 돌연변이 활성을 나타내었다. E. coli WP2s와 비교하여 E. coli WP2 $(WP2s\;uvrA^+)$에서 돌연변이활성이 크게 감소한 반면 균 생존율이 상당히 증가한 결과로부터 절제수복에 의해 쉽게 제거되는 DNA 손상임을 확인할 수 있었으며, E. coli CM611(WP2s lexA102)에서 돌연변이활성 및 균 생존율 모두 상당히 감소된 결과로부터 이들 물질에 의한 주요 DNA 손상이 SOS 수복 의존성임이 시사되었다. 또한 E. coli TK610 (umuC)에서의 돌연변이율과 균 생존율은 그 대조 균주인 E. coli TK603 $(umuC^+)$에 비하여 상당히 감소하여 chloropropanol에 의한 돌연변이 유발은 umuC가 관여하는 SOS 수복을 통하여 일어나는 것으로 확인되었다. E. coli GW1105 [lexA3 (Ind)]와 GW1107 [lexA51 (Def)] 두 균주에서 ${\beta}-galactosidase$의 활성이 chloropropnaol 첨가에 의해 변화하지 않았기 때문에 SOS 반응의 repressor로 작용하는 LexA에 대하여 chloropropnol이 직접적으로 영향을 미치지 않는 것으로 나타났다. 따라서 chloropropanol에 의한 DNA 손상은 가장 기본적인 수복계라 할 수 있는 절제수복에 의하여 제거될 수 있으며, 돌연변이의 발생은 주로 SOS 수복계를 통하여 일어남을 확인할 수 있었다.

• 조명전기설비학회논문지
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• 제27권10호
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• pp.9-14
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• 2013

The monitoring system is an absolutely required system for improving a performance to consider the situation for the hybrid generation of the photovoltaic (PV) and wind power (WP) energy experimental research complex. This system is to monitor with the railroad switching point heating system using LabVIEW to the hybrid generation of the PV and WP. The monitoring system of this paper is a program monitoring the hour, day and total of the voltage and current that made from the hybrid generation of PV and WP. In experiment, we acquired the power data according to time at the day of PV and WP. We have confirmed the possibility of the real time monitoring system using LabVIEW with the railroad switching point heating system as the hybrid generation of the PV and WP.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.110.1-110.1
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• 2011

This study analyzed the performance of long term operation photovoltaic system The 50 kWp grid connected photovoltaic system which was installed at KEPRI site in 1999 has been operated more than 12 years. In order to acquire long term operation characteristics of medium size photovoltaic system, the operation test data related on power generation electricity and capacity factor of 50 kWp system, which have been collected since 1999, were analysed. From the analysing results, 57.7 MWh in annual power generation electricity of 50 kWp photovoltaic system in 1999 has been decreased 49.1 MWh in 2005 and reached 38.0 MWh in 2010. In addition to, the capacity factor of 50 kWp photovoltaic system also showed 13.2 % in 1999, 11.2% in 2005 and finally reached 8.8% in 2011. The operation test data showed a trend of decreasing of generation electricity and capacity factor during the 12 years operation time and we guessed that was caused by solar cell performance degradation and decreasing of PCS system efficiency.

• 한국태양에너지학회 논문집
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• 제29권5호
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• pp.14-19
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• 2009

The 50 kWp grid connected photovoltaic system which was installed at KEPRI site in 1999 has been operated more than 10 years. In order to acquire long term operation characteristics of medium size photovoltaic system, the operation test data related on power generation electricity and capacity factor of 50 kWp system, which have been collected since 1999, were analysed. From the analysing results, 57.7 MWh in annual power generation electricity of 50 kWp photovoltaic system in 1999 has been decreased 49.1 MWh in 2005 and reached 41.9 MWh in 2008. In addition to, the capacity factor of 50 kWp photovoltaic system also showed 13.2 % in 1999, 11.2% in 2005 and finally reached 9.6% in 2008. The operation test data showed a trend of decreasing of generation electricity and capacity factor during the 10 years operation time and we guessed that was caused by solar cell performance degradation and decreasing of PCS system efficiency.

• 자원환경지질
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• 제56권5호
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• pp.581-588
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• 2023

본 연구에서는 2021년 WP21 탐사를 통해 수집한 마리아나 해구 주변 해양퇴적물(WP21GPC04)에 대한 깊이 별 원소 분포 및 광물 구성에 대한 분석을 수행하였다. 마이크로 X선 형광법(μ-XRF)을 통해 분석된 WP21GPC04 해양 퇴적물의 평균 화학조성은 깊이에 따른 특징적인 변화 없이 평균 SiO₂ 53.91 wt%, FeO 4.48 wt%, Al₂O₃ 16.56 wt%, MgO 2.56 wt%, CaO 4.79 wt%, Na₂O 3.52 wt%, K₂O 5.48 wt%를 보이며, 이를 Mariana pelagic clay와 평균 해양 퇴적물의 원소 분포인 GLOSS (global subducting sediment)의 성분과 비교하였다. 방사광 X선 회절법(Synchrotron-XRD)을 이용하여 분석된 광물 구성은 깊이에 따라 다소 차이가 있음을 확인하였다. 석영, 운모, 사장석은 모든 깊이에서 확인된 반면 녹니석은 상대적으로 얕은 깊이에서만 확인되었고, 제올라이트 계열인 필립사이트와 휼란다이트는 퇴적 깊이에 따라 점진적인 함량의 변화를 보였다. 이는 해양 퇴적물의 퇴적 시기에 따른 환경에 변화가 있었거나 유사한 상 안정성에 의한 공생관계로 해석될 수 있다. 본 연구 결과는 서태평양 마리아나 해구 주변의 퇴적 환경 변화와 섭입하는 해양 퇴적물의 상 분포 및 거동에 따른 섭입대 특성 연구에 대한 기초 자료를 제공할 것이다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.123-126
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• 2005

Recently, because of the depletion of fossil fuels and the environmental pollution by using fossil fuels and harmfulness of atomic power plants. the interests concerning new and renewable energy resources are rising increasingly. And of all new and renewable energy sources the PV generation systems are recognized as the most useful and desirable renewable energy source in allowance for installation conditions. In this development, the 3kWp photovoltaic power generation system is realized to verify the performance of the 3kWp PCS developed by Hyundai Heavy Industries Co. (HHI). The photovoltaic array used in this system is composed of 60 modules of 50Wp capacity. The developed system is tested as procedures and items of test regulation recognized by governmen and the experimental results show the excellent electrical characteristics. Now, the 3kWp PCS developed is installed in the PV model house built in HHI plant and is being tested for practical use commercialization.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2006년도 춘계학술대회
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• pp.195-202
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• 2006

본 연구에서는 보다 효과적인 기업부도예측을 위하여, 동계적 방법과 인공지능 방법을 결합한 통합모형을 제시하였다. 이를 위하여 통계적인 모형 중에서 가장 널리 활용되고 있는 다변량 판별분석, 로지스틱 회귀분석과 인공 지능적인 방법으로서 최근 널리 사용되고 있는 인공신경망, 규칙유도기법, 베이지안 망의 5가지 방법론을 통합한 Voting with Performance & Weights from ANN(WP-ANN) 통합모형을 제시하였다. 실험결과, 본 연구에서 제안한 WP-ANN 통합모형은 다변량 판별분석, 로지스탁 회귀분석, 인공신경망, 규칙유도기법, 베이지안 망 등의 단일모형과 비교한 결과 가장 예측정확성이 유수한 것으로 나타났다. 따라서 본 연구를 통해 기업부도예측에 있어서 WP-ANN 통합모형이 기존의 모형들에 비해 우수한 예측정확성을 나타냄을 알 수 있었다.

• 제어로봇시스템학회논문지
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• 제13권6호
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• pp.547-554
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• 2007

This thesis presents a kind of active noise control(ANC) algorithm for reducing noise due to engine inside a car. The proposed control algorithm is, by using WP(Wavelet Packet), a one improving the instability due to delay of noise transmission and the lack of response ability for the rapid change of noise, which are defects of the existing FXLMS(Filtered-X Least Mean Square) algorithm. The chief character of this system is a thing that faster operation than the FXLMS is implemented by inserting WP in the secondary path. In other words, WP implements parallel operation. Then, the weights of filter in the adaptive algorithm will be updated faster. In addition, because WP have so excellent a resolution, they can process very minute noise. The efficiency of this control algorithm will be demonstrated in the matlab simulation and in the actual experiments by using a Labview program and a car.