http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
超音波 燃料供給裝置를 이용한 디젤機關의 性能 向上에 관한 硏究
양정규(J.K.Yang),최두석(D.S. Choi),윤진한(J.H.Yun),류정인(J.I.Ryu) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To improve the performance of diesel engine. we designed new fuel feeding system nam ed ultrasonic fuel feeding system. The performance test of diesel engine carried out<br/> to exame possibility of practical use of ultrasonic fuel feeding system to test engine. This paper deal with the comparative results of performance test of diesel engine, that is. Smoke. HC. CO. SFC, PS, Thermal Efficiency, Torque.<br/>
소형디젤기관의 연소실 내에서의 공기 유동이 기관성능에 미치는 영향(1) -관로 공기유통의 난류특성-
양정규(J.K.Yang),조성철(S.C.Cho),윤진한(J.H.Yun),류정인(J.I.Ryu) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1994 No.11_1
The purpose of this study investigated on the engine performance in the combustion chamber of air flow and swirler to swirl effect in the combustion chamber. Swirl angle and pressure variation in air flow characteristics with a tube was measured by using Paddle Wheel and Manometer, and turbulence intensity was measured by Hot Wire Anemometer.<br/> The results are as followed :<br/> 1. Vacuum degree increased in proportion to the intake air velocity and the angle of swirler<br/> 2. The magnitude of vacuum degree had a periodic characteristics produced maximum value every specified length at the mounting place of the swirler<br/> 3. Strong swirl was uniform regardless of flow velocity as the angle of swirler is at more than 45°<br/>
공간정보와 생육모의에 의한 남한 벼 품종의 북한 서부지대 적응성 예측
김영호 ( Y. H. Kim ),김희동 ( H. D. Kim ),한상욱 ( S. W. Han ),최재연 ( J. Y. Choi ),구자민 ( J. M. Koo ),정유란 ( U. L. Chung ),김재영 ( J. Y. Kim ),윤진일 ( Jin I. Yun ) 한국농림기상학회 2002 한국농림기상학회지 Vol.4 No.4
A long-term growth simulation was performed at 496 land units in the western coastal plains (WCP) of North Korea to test the potential adaptability of each land unit for growing South Korean rice cultivars. The land units for rice cultivation (CZU), each of them represented by a geographically referenced 5 by 5 km grid cell, were identified by analyzing satellite remote sensing data. Surfaces of monthly climatic normals for daily maximum and minimum temperature, precipitation, number of rain days and solar radiation were generated at a 1 by 1 km interval by spatial statistical methods using observed data at 51 synoptic weather stations in North and South Korea during 1981-2000. Grid cells falling within a same CZU and, at the same time, corresponding to the satellite data- identified rice growing pixels were extracted and aggregated to make a spatially explicit climatic normals relevant to the rice growing area of the CZU. Daily weather dataset for 30 years was randomly generated from the monthly climatic normals of each CZU. Growth and development parameters of CERES-rice model suitable for 11 major South Korean cultivars were derived from long-term field observations. Eight treatments comprised of 2 transplanting dates×2 cropping systems×2 irrigation methods were assigned to each cultivar. Each treatment was simulated with the randomly generated 30 years` daily weather data (from planting to physiological maturity) for 496 land units in WCP to simulate the growth and yield responses to the interannual climate variation. The same model was run with the input data from the 3 major crop experiment stations in South Korea to obtain a 30 year normal performance of each cultivar, which was used as a reference for comparison. Results were analyzed with respect to spatial and temporal variation in yield and maturity, and used to evaluate the suitability of each land unit for growing a specific South Korean cultivar. The results may be utilized as decision aids for agrotechnology transfer to North Korea, for example, germplasm evaluation, resource allocation and crop calendar preparation.
조성인,배영민,윤진일,박은우,황헌,Cho, S. I.,Bae, Y. M.,Yun, J. I.,Park, E. W.,Hwang, H. 한국농업기계학회 2000 바이오시스템공학 Vol.25 No.2
A forcasting scheme for daily solar irradiance on agricultural field sis proposed by application of chaos theory to a long term observation data. It was conducted by reconstruction of phase space, attractor analysis, and Lyapunov analysis. Using the methodology , it was determined whether evolution of the five climatic data such as daily air temperature , water temperature , relative humidity, solar radiation, and wind speed are chaotic or not. The climatic data were collected for three years by an automated weather station at Hwasung-gun, Kyonggi-province. The results showed that the evolution of solar radiation was chaotic , and could be predicted. The prediction of the evolution of the solar radiation data was executed by using ' local optimal linear reconstruction ' algorithm . The RMS value of the predicting for the solar radiation evolution was 4.32 MJ/$m^2$ day. Therefore, it was feasible to predict the daily solar radiation based on the chaos theory.