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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.
펨토초 레이저를 이용한 투명재료 내부의 극미세 프로세스
조성학(S. H. Cho),김영미(Y. M. Kim),유병헌(B. H. Yoo),장원석(W. S. Chang),김재구(J. G. Kim),황경현(K. H. Hwang) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
We will provide the ultra-precise material processing technique with a femtosecond pulse laser system.