• Proceedings of the Korea Multimedia Society Conference
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• 2003.05b
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• pp.641-645
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• 2003

본 논문은 일반적으로 차량의 번호판이 차종에 따라 녹색계통과 노란색계통 등 일정한 색상을 가지고 있다는 특징을 이용하여, 복합 칼라 좌표계의 성분을 결합한 차량 번호판 영역 추출에 대한 방법을 제안하였다. LUV와 HSI 및 YIQ 칼라 좌표계에서 번호판 영역을 검출하기 위해 사용한 색상은 U, H, Q영역이고 이진화 작업을 위한 임계치 조정의 효율성을 높이기 위해 각 영역의 평균 자기 값을 기준이 되는 값으로 보정하는 방법을 사용하였다. 처리과정의 효율성을 높이기 위해 번호판 후보 영역을 선정하여 번호판 크기의 마스크영역을 수직, 수평 라인으로 검색하여 추출하는 방법을 사용하였다. 실험 결과 H와 Q성분으로만 실험대상에 대하여 결합한 경우는 72.58％의 추출률을 보인 반면, 제안한 방법인 U와 H 및 Q성분의 결합에 의한 경우는 100％의 추출률을 보였다.

• Korean Journal of Breeding Science
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• v.41 no.3
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• pp.236-243
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• 2009

This study was conducted to develop a japonica-type rice cultivar with brown planthopper (BPH) resistance using DNA markers. A doubled haploid (DH) population consisting of 120 pure-lines was established by anther culture of $F_1$ hybrids between 'Samgang', a Tongil type BPH resistance cultivar, and 'Nagdong', a japonica cultivar. To determine the map position of genes responsible for BPH resistance in rice, a genetic map was constructed based on 120 DH lines. A total of 162 molecular markers were classified into 12 linkage groups, covering 1,884 Kosami centimorgan (cM) with an average of 11.6 cM. Five QTLs (qBPR3, qBPR6, qBPR7, qBPR8, and qBPR12) associated with BPH resistance were identified and mapped on chromosomes 3, 6, 7, 8, and 12, respectively, using the genetic map constructed in this study. To analyze the relationship between BPH resistance and agronomic traits, a total of eight QTLs related to the agronomic traits were detected on 12 rice chromosomes. In an analysis of relationships, three QTLs (qBPR3, qBPR7, and qBPR8) showed a linkage with tested agronomic traits. A QTL (qBPR3) located on chromosome 3 (RM282-3023) was closely linked to culm length (qCL3). The QTL (qBPR8) for BPH resistance on the short arm of chromosome 8 also overlapped the region detected in culm length (qCL8).

• Journal of Plant Biology
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• v.24 no.4
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• pp.217-231
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• 1981

This research was conducted to determine if the obtained serological data would reveal: (1) grouping among basic Quercus species, (2) the degree of correspondence within and among any detected grouping, and (3) the comparative value of new serological technique, "rocket immunoelectrophoresis". Overall quantitative and qualitative data indicate the genus Quercus is distantly separated from the Fagus. Within the Quercus, the subgenus Cyclobalanopsis is separable from the Lepidobalanus. But the elevation of the Cyclobalanopsis to the rank of a separate genus is not warranted. Antisera produced to the species belonging to Lepidobalanus gave strong reactions with other experimental species in the same subgenus. Particularly, Q. aliena, Q. donarium, and Q. serrata are tied up each other in terms of serological similarity. Rocket immunoelectrophoresis used in this systematic research proved to be a valuable new technique for systematic serology. To obtain the degree of protein similarity (serological correspondence) this technique was used in plant systematic research and determined by sum of total rocket heights. The rocket immunoelectrophoresis illustrated the measurement of individual immunoprecipitin systems identical or partly identical to those in the reference-reaction as quantitation of all available rocket heights.t heights.

• Journal of Life Science
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• v.28 no.3
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• pp.314-319
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• 2018

We analyzed QTLs for alkali-related digestion by using 120 population crossed Cheongcheong and Nagdong derived from anther culture (CNDH). The DNA markers located in the QTLs gene were selected and applied to existing cultivars. As a result of the investigation of the alkali decay degree, brown rice of Cheongcheong and Nagdong was 1.9 and 1.6, respectively, and the CNDH was $3.79{\pm}2.01$, and the distribution of variance was distributed to 7.0-1.0. The milled rice of Cheongcheong and Nagdong was 5.6 and 4.1, respectively. The mean of the CNDH was $4.86{\pm}1.55$, and the distribution of variance was distributed to 7.0-2.0. Variation distribution curves showed continuous variation that was close to non-normal distribution. In the QTLs analysis, qBRA2, qBRA6, and qBRA11 were mapped in 1-2 replications of brown rice. QHRA2-1, qHRA2-2, qHRA2-3, qHRA3, and qHRA8 were mapped in the first replication. QHRA2-1, qHRA2-2, qHRA2-3 and qHRA3 were mapped in the second replicates. And mapped to qHRA5 in 4 replicates. These were found on chromosome 2, 3, 6, 8 and 11, respectively. The phenotypic variations of qBRA2, qBRA6, and qBRA11 on the chromosomes of brown and milled rice were 1-9%. The polymorphism was analyzed for 12 types of the japonica type and six types of the indica type, based on the nine markers found in the QTLs analysis of alkali digestion. Chromosome 11, RM27258, was selected to determine the segregation ratio, which shows the difference in size by the band pattern. The results of this study will be used as basic data for the development of high-quality rice cultivars.

• The Transactions of the Korean Institute of Power Electronics
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• v.13 no.3
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• pp.206-212
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• 2008

This paper proposes the PLL(Phase-Locked Loop) algorithm by a new FFT(Fast Fourier Transform) in a grid-connected PV PCS(Photovoltaics Power Conditionning System). The grid-connected inverter that is applied in a new renewable energy field needs the grid phase information for synchronism. Unlike the PLL which is normally used by three phase D-Q conversion, the preposed PLL algorithm using FFT has non-gain tuning and the powerful noise elimination by the characteristics of FFT. Both simulation and experimental result show that proposed algorithm has the good capacity.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.558-559
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• 2010

화석연료의 사용으로 인한 환경문제로 신재생에너지 부분에 대한 관심이 증가하였다. 따라서 분산전원 시스템과 계통과의 연계 필요성이 증대되고, 이로 인해 계통연계형 인버터의 연구가 활발해지고 있다. 인버터를 계통과 연계하기위해서는 계통의 위상정보를 정확히 측정하여 인버터의 주파수와 위상이 동일한 상태로 전류가 공급되도록 해야 한다. 본 논문은 PWM을 이용한 3상 인버터를 고찰하였으며, 3상 D-Q 변환을 통한 PLL의 구조를 사용하여 인버터의 출력전압과 계통 전압의 위상을 동기화시켜 부하에 동일한 위상으로 공급되도록 하는 계통연계형 3상 PWM 인버터 시스템을 MATLAB/Simulink를 이용하여 구성하였다.

• Proceedings of the KIPE Conference
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• 2018.07a
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• pp.33-35
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• 2018

본 논문에서는 Quasi-Watkins-Johnson(qWJ) 인버터를 제안한다. 단상 qWJ 인버터는 기존의 Watkins-Johnson(WJ) 인버터에서 간단한 회로 수정을 통해 제안되며, 기존의 WJ 인버터의 모든 장점을 유지한다. 제안한 인버터는 모든 능동 스위치가 비절연형 게이트 구동을 하므로 게이트 구동회로의 부담을 덜어주고 기존 방식에 비해 적은 비용과 작은 크기로 구현할 수 있다. 또한, 제안한 인버터는 기존의 하프-브릿지 인버터의 출력전압보다 더 큰 출력전압을 가진다. 3상 qWJ 인버터는 출력전압이 입력전압의 2배까지 승압이 가능하다. 계통연계형 태양광 시스템에 적용 시, 기존의 3상 전압형 인버터는 누설전류로 인해 안정성에 문제가 생길 수 있지만, 제안한 인버터는 누설전류에 의한 문제가 생기지 않는다. 그러므로 제안한 인버터는 누설전류를 줄이기 위한 추가적인 회로가 필요하지 않고 적은 비용과 작은 사이즈로 계통연계형 태양광 인버터 시스템을 구현할 수 있다. 이러한 장점들은 3상 qWJ 인버터에서 더욱 현저하게 드러난다. 1kW의 시제품을 제작하여 제안한 인버터의 성능을 검증하였다.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.39 no.12
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• pp.1281-1287
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• 1990

A new thermal power plant feed-water system model, which is based on Astrom, is presented. Astrom's model has some difficulties in applying to practical systems because it is not able to measure the heat and energy transfer loss. Hence, in order to make up for these difficulties, the Gas State Equation is added to the model. Computer simulations are performed to show the validity of the new model at thermal power plant with practical boiler operating data and to verify the L.Q. controller effect on boiler drum level system.

• Korean Journal of Plant Resources
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• v.30 no.2
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• pp.213-218
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• 2017

Rice is the staple food of at least half of the world's population. Due to global warming, the weather is difficult to forecast nowadays. Therefore, it is necessary to breed various breeding to respond to such changes in the environment. This study was conducted to analyze the QTL about plant form, culm length, ear number and ear length by using 120 lines by anther culture, a cross between the Indica variety Cheongcheong and Japonica variety Nagdong. DNA marker was selected on the QTLs gene, and the following results were obtained. CNDH (Cheongcheong Nagdong Doubled Haploid) lines frequency distribution table curves about culm length, ear number and ear length exhibited showed a continuous variation close to a normal distribution. QTL analysis result, on culm length qPlL1-1 and qPlL1-2 were detected on the chromosome 1 and qPlL5 was detected on the chromosome 5. However, on ear length qPL2, qPL3 and qPL10, were detected on the chromosome 2, 3 and 10, while on ear number qPN1-1 and qPN1-2 were detected on the chromosome 1, qPN9 was detected on the chromosome 9. The QTLs related to culm length was found to chromosomes 5 and LOD scores were 3.81. The QTLs related to ear length was found to chromosomes 2 and 3 LOD scores were 7.13 and 3.20. The QTLs related to ear number was found to chromosome 9 and LOD scores were 4.27. Twenty two (22) Japonica cultivars and 12 Indica cultivars were analyzed polymorphisms, using selected 9 markers from the result about plant form analysis. RM5311, RM555 and RM8111 about the culm length, the ear length and number of ear were selected on the standard of Cheongcheong and Nagdong. Each rate of concordances about the culm length, the ear length and number of ear are 44.11%, 41.17% and 44.11%.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.199_200
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• 2009

전통적인 발전기 무효전력 예비력은 발전기가 출력할 수 있는 최대 무효전력 출력에서 현재 운전 중인 발전기의 무효전력 출력의 차이로 계산된다. 그러나 모든 발전기가 계통에 동일한 영향을 미치는 것은 아니기 때문에 이를 개선하기 위한 방안이 필요하다. 계통 제어에 민감한 발전기들을 선정하고 보다 효용성 있는 무효전력 예비력을 산출한다. 따라서 본 논문에서는 전력 조류 방정식을 Q와 V의 관계식으로 선형화하여 발전기의 감도를 도출한다. 도출된 감도는 부하의 무효전력 변화에 대한 발전기의 무효전력 출력의 변화를 나타내는 값으로 감도를 각 발전기별 가중치로 적용해서 효용 무효전력 예비력을 계산한다.