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- 저자 : 黃梗準(Kyoung-Jun Hwang) (검색결과 5 건)
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뉴로-퍼지 알고리즘을 이용한 전력 설비의 열화 상태 분석 연구
황경준(Kyoung-Jun Hwang),이현룡(Hyun-Ryoun Lee),최유순(Yoo-Seun Choi),김용갑(Yong-Kab Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
In this paper, we have studied for analysis of the partial discharge(PD) signal in power transmission line. The PD signal has estimated as detected signal accumulation of a PRPDA method by using Labview, and analyzed with ncuro-fuzzy algorithm. With practical PD logic implementation of theoretical detected system and hardware implementation, the device for Hipotronics Company's 22.9㎸ or 154㎸ setup has generated and then has applied with 18kV,20kV with 1:1 time probe. It's also used the LDPE 0.27㎜t (scratch error 0.05㎜t) to sample for making PD. Our new class of PD detected algorithm has also compared with previous PRPDA or Fuzzy algorithm, which has diagnose more conveniently by adding numerical values.
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뉴로-퍼지 알고리즘을 적용한 광파이버 유도 브릴루앙 산란 센서의 신뢰도 향상에 관한 연구
黃梗準(Kyoung-Jun Hwang),廉景太(Keong-Tae Yeom),金鎔甲(Yong-Kab Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.1
This is a research to apply 1310㎚ single-mode optical fiber to a temperature sensor. The existing study of optical fiber sensor is complicated because it was made with various equipment. To vary scattering, the variation of optical frequency is measured by using Bragg(lattice) or pulse generator and also bulk system is created by YAG laser but there were some difficulties creating experimental environment and it was a problem that the stability of measured data was low. The temperature sensor system using the suggested sBs(stimulated Brillouin scattering:sBs) from this research is much more simplified straight-line system. To improve the trust and accuracy of noises from optical frequency and unclear results, it was analysed by using Neuro-Fuzzy algorithm. we tried to get more correct data than existing system. sBs measure that optical frequency changed due to the variation of temperature. The analyzed change rate of outcome by Fuzzy theory is 1.1 ㎒.
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제주 서부지역 양돈장에서 생산된 돈분액비의 비료성분과 그성분간 상관관계
송상택(Sang Taek Song),김문철(Mun Chol Kim),황경준(Kyoung Jun Hwang) 한국초지조사료학회 2006 한국초지조사료학회지 Vol.26 No.1
This study was conducted to make a rapid and easy determination for the fertility of liquid pig manure as fertilizer by investigating the contents, and correlation coefficients of various nutrients. Samples were collected from 118 local pig farms in the western area of Jeju in Korea. Electrical conductivity(EC), dry matter(DM), NH₄-N and minerals were determined and the relationships among them were examined. The collected liquid manure samples from 118 pig farms were classified according to the level of DM contents ; < 3% (92 farms), 3~ 6% (18 farms), 6 ~ 9% (5 farms) and > 9 % (3 farms), based on the collected data, most of the liquid manure coming from the local pig farms contain small amount of dry matter. The dry matter contents appeared highly correlated(p<0.01) with EC, NH₄-N, T-P, Ca, Mg and Na, except for K. In addition EC was proportional to NH4-N, T-P, Ca, and Na except for Mg. The fertilizer component ratio of NH₄-N, P and K in liquid pig manure were not constant, resulting in low efficiency for fertilizer. However, the toxic heavy metals of Cu etc. were below the criteria of organic fertilizer and soil contamination evaluation. Therefore, we concluded that both dry matter content and electrical conductivity could be used as an indicator for evaluating the fertility of liquid pig manure.
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돈분액비 시용이 호밀의 생산성 및 토양의 이화학적 특성에 미치는 영향
김문철(Moon-Chul Kim),송중용(Jung-Young Song),황경준(Kyoung-Jun Hwang),송상택(Sang-Teak Song),현철호(Cheol-Ho Hyun),강태현(Tea-Hyun Kang) 한국초지조사료학회 2008 한국초지조사료학회지 Vol.28 No.2
돈분액비의 DM 농도와 분시 차이가 동계사료작물의 생산성 및 토양특성에 미치는 영향을 비교하기 위해 2005년 11월부터 2006년 6월까지 제주특별자치도 축산진흥원 사료작물 포장에서 동계사료작물 호밀을 이용하여 수행되었다. 시험은 주구 2처리(고농도 DM 7.0%, 저농도 DM 1.6% 돈분액비), 세구 2처리(기비 100%, 기비 50%와 추비 50% 시용)를 각 각 4반복 분할구법으로 설계하였다. 고농도 돈분액비 시용이 저농도 액비 보다 호밀의 초장과 건물수량에 통계적으로 유의적 증가를 보였다(P<0.05). 호밀의 조단백질 함량은 액비를 기비만 시용하는 것 보다 분시하므로 증가하였다(P<0.05). 돈분액비 시용으로 호밀의 대량무기물 (P, K, Ca, Mg 및 Na)이나 미량무기물 (Cu, Fe, Mn 및 Zn) 함량에 차이를 주지 않았고 동계사료작물 호밀을 재배했던 토양의 이, 화학적 특성에도 분뇨처리 효과가 없었다. 다만 호밀의 평균 P 함량 0.16%는 화본과 작물 적정수준 0.2~0.4% 보다 부족했고 호밀재배 토양의 pH (5.5), OM(13.3%), 유효인산 (47.6 ㎎/㎏) 및 Ca (2.75) 함량은 농경지 토양 수준 보다 부족하였다. 결론적으로 DM 7.0%의 고농도 액비시용은 DM 1.6%의 저농도 액비 보다 호밀의 생산성 향상을 가져 왔으나 재배 토양의 이, 화학적 특성에 변화를 주지 않았다. The study was conducted to investigate the effects of DM (dry matter) content and split application of liquid swine manure (LSM) on productivity of rye and subsequent soil quality on the pasture of Livestock Policy Division, Jeju Special Self-Governing Province. The experiment was done between November, 2005 and June 2006, using split plot design. Treatments were 2 main plots (7.0 and 1.6% DM LSM) and 2 subplots (basal fertilizer 100% and basal fertilizer 50% + top dressing 50%). Application of 7.0% DM LSM resulted in significant increase in DM yield and plant length of rye compared with 1.6% DM LSM (p<0.05). Crude protein content of rye was significantly higher in split application(basal fertilizer 50%+ top dressing 50%) than in basal fertilizer 100% (p<0.05). No significant difference in macro and micro mineral contents of rye or in subsequent soil quality was found by application of LSM. Mean P content (0.16%) of rye appeared to be lower than proper P level (0.2~0.4%) of grass crop. The pH (5.5), OM (13.3%), available P₂O? (47.6 ㎎/㎏) and Ca (2.75 cmole/㎏) content of the pasture soil studied were lower, compared with those of cultivated soil. Results show that the application of a 7.5% DM liquid swine manure increases the productivity of rye compared with a 1.6% DM liquid swine manure, meanwhile the property of pasture soil was not influenced by application of LSM.
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제주지역에서 건물 함량이 다른 돈분 액비 시용이 이탈리안 라이그라스, 호밀, 및 귀리의 수량, 사료가치 및 토양 특성에 미치는 영향
송상택(Sang Taek Song),김문철(Moon Choi Kim),황경준(Kyoung Jun Hwang) 한국초지조사료학회 2006 한국초지조사료학회지 Vol.26 No.3
This study was conducted to investigate the effects of two dry matter levels of liquid swine manure on dry matter yield and nutritive value of Italian ryegrass, rye and oats, and the chemical c㏊racteristics of soil in Jeju. This experiment tested in split plot design. Three forage crops (Italian ryegrass, rye and oats) were the main plot and four fertilizers (no fertilizer = T0, chemical fer tilizer = T1, liquid swine manure with DM 2.7% = T2 and liquid swine manure with DM 5.9 % = T3) were the sub plots. Yield and nutrient contents of forage crops and soil properties were determined. Application of liquid swine manure containing 5.9 % dry matter resulted in highest DM yiel d in all three forage crops species compared with the other treatments (p〈0.01). Crude protein content (%) and crude protein yield (㎏/㏊ ) of forage crops were highest in rye compared with the other forage crops species (p〈0.01). K and Mg contents of soil were higher (p〈0.01) in rye t㏊n in the other specie s while Na contents was higher (p〈0.01) in Italian ryegrass t㏊n others. Mg content of soil appeared higher in rye t㏊n in the others and higher (p〈0.05) in forage crops applied with liquid manure containing 2.7% DM compared with the other species. NO ₃?N contents in soil was lower in rye t㏊n the other species and higher in species with chemical fertilizer. These findings indicate t㏊t most of liquid swine manure produced on local pig farms containing low levels of dry matter and other nutrients suggest a low efficiency of its use as a fertilizer. The liquid swine manure is recommended as a fertilizer for rye production in winter, compared with Italian ryegrass or oat.
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