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박용 엔진의 유한요소 모드해석을 통한 상태 공간 모델 개발
이원창(W. C. Lee),김성열(S. R. Kim),안병수(B. S. Ahn),최헌오(H. O. Choi),김재실(C. S. Kim) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This article provides a dynamic analysis model for huge marine engine that examined analytically variation effects of frequency response by fitting of transverse stays such as hydraulic type. First, vibration analysis using the three dimensional finite element models for the huge marine engine has performed in order to find out the dynamic characteristics. Second, three dimensional finite elements model for the huge marine engine was modifued so that generate forcing nodes in crosshead part and top bracing nodes in cylinder frame part. Third, a system matrix and output matrix was derived for the general siso(single input single out) state space model. Finally, developed state space model for the three dimensional finite elements model for the huge marine engine without the additional modifying process.
韓國에서의 日本腦炎에 關한 硏究 - (第II報) 日本腦炎發生의 關係要因에 對한 醫學計學的 考察
Lee W.C.(李元暢),Yun K.B.(尹快炳),Lee T.J.(李澤柱),Yoon H.J.(尹和重),Chung, B.H.(鄭柄鉉),Lee S.M.(李相穆) 한국예방수의학회 1983 예방수의학회지 Vol.7 No.1
This paper will present an epidemiological information aspects of Japanese encephalitis in Korea of the past ten years from 1971 to 1980 and the medical statistical observation on the relative factor of Japanese encephalitis. It hoped that the information will be used for reference in future endeavors of study in the follows: The obtained results were as follows: 1. The mean of the incidence cases of Japanese encephalitis in Korea from 1971 to 1980 was 94.2±24.6(S.E.), that of incidence rate per 100,000 was 0.26±0.07 (S.E.) and that of case fatality rate was 3.6±0.89 per 100 cases. 2. The highest incidence cases of Japanese encephalitis could be found in younger whose age under 19 years old, which accounted 96% of the total incidence cases. 3. The correlation coefficient between the incidence cases of Japanese encephalitis and number of vaccinated in man was r=-0.416, its and pesticide consumtion amount was r=-0.432 and its and number of pig vaccinated was r=-0.485. 4. Correlation coefficient between year after imported and positive rate of HI test of Japanese encephalitis was r=+0.976.