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윤종화 ( Jong Hwa Yun ),최진호 ( Jin Ho Choi ),권진회 ( Jin Hwe Kweon ) 한국복합재료학회 2013 Composites research Vol.26 No.2
복합재 구조물에서 체결부위는 매우 취약한 부분이므로 복합재료 체결부에 대한 설계는 중요한 연구분야로 대두되고 있다. 본 논문에서는 L-형 보강구조를 가진 복합재 구조를 이차접착의 공법으로 제작하여 하중 방향을 달리하여, 접착두께(0.2 mm, 0.6 mm, 4 mm)에 따른 접착강도 실험을 수행하였다. 또한 이를 유한요소해석을 수행하여 파손지수값을 실험값과 상호 비교하였다. The design of composite joint is important research area because they are often the weakest areas in composite structures. In this paper, the specimens with three paste thickness (0.2 mm, 0.6 mm, 4 mm) were manufactured in secondary bonding method and tested in two different loading direction condition. Also, the failure index of the L-type stiffener was calculated by the finite element method and compared with experimental results.
Weibull 분포를 응용한 임학연구 (Ⅰ) - 직경분포의 추정 -
윤종화 ( Jong Hwa Yun ) 한국산림과학회 1983 한국산림과학회지 Vol.59 No.1
Estimation of stand diameter distribution by using Weibull distribution, and then the result is tested by Kolomogorov-Smirnov method expresses very fine fitted.
임분재적 (林分材積) 측정법의 효율적 개선방안에 관한 연구
이종락,윤종화,이흥균,김장수 ( Jong Lak Lee,Jong Hwa Yun,Heung Kyun Lee,Chang Soo Kim ) 한국산림과학회 1987 한국산림과학회지 Vol.76 No.3
The purpose of this study is to develop the method of stand volume estimation by the plotless sampling method. The required data were obtained from 164 sampling plots in the red pine(Pinus densiflora)stands which were located in Kyeong-gi, Chung-nam, Chung-buk and Kang-won areas, and related factors were measured actually. The method of stand volume estimation and several tables were drivel from these data. 1. The relationship between the values of stand average height, basal area per ha, and basal area height obtained from the plotless sampling method and values measured actually could be described by the equation Y=bx, where b approached nearly 1.0 and there were no significant differences between them. Therefore stand volumes could be estimated by the plotless sampling method. 2. The estimated equations of the stand voulumes, which were estimated using factors to be measured by dendrometer, are as follows; logV=-0.0208+0.8497 logGH, logV =-0.0028+0.7981 logG+0.9313 logH. Stand volume tables by these estimated equations were shown in table 4, 5 and estimation error percentages were 9.16% and 8.50% respectively. FH=D/ (1.5205+0.0994D) logFH=0.0451+0.2429 logD+ 0.3474 logH logFG=-0.0380+0.77581ogG-0.0066logH F=H/ (-5.1697+2.6013H) F=FH/(-3.1256+2.7611FH) logF=-0.0634-0.0848 logGH-0.1224 logDi 4. Stand form height tables(table7,8), form basal area tables(table 9), and stand form factor tables(table 10, 11) were prepared using the above estimated equations, and the estimation error percentages were less than 10%.
$\ll$황제내경(黃帝內經)$\gg$의 열병(熱病) 치료혈(治療穴)과 방풍통성산(防風通聖散)의 이론적 상관성에 관한 연구
정미경,윤종화,박현국,김기욱,장민기,이승덕,김갑성,Jung, Mi-Kyung,Yun, Jong-Hwa,Park, Hyun-Guk,Kim, Gi-Wook,Jang, Min-Gee,Lee, Seung-Deok,Kim, Kap-Sung 대한침구의학회 2008 대한침구의학회지 Vol.25 No.5
Backgrounds : There have not been so many studies about the correlation of logical background between acupuncture and herbal medicine. Objectives : This study was aimed to find out the logical relationship between acupuncture points of Wushijiuyu(五十九兪) and Fangfengtongshengsan(防風通聖散) for the treatment of fever disease. Methods : I investigated the background of rationale of Wushijiuyu(五十九兪) and Fangfengtongshengsan(防風通聖散) through survey of classical text include Yellow Emperor's Classic of Medicine(.帝.經內經, Hwang Di Nei Jing), Liujing(類經), Zhenjiujiayijing(鍼灸甲乙經) and Huangdisuwenxuanmingfanglun(黃帝素問宣明方論). Results & Conclusions : The words "Wushijiuyu(五十九兪) and Wushijiuci(五十九刺)" are founded in the Yellow Emperor's Classic of Medicine(黃帝內經) are either prescription of the acupuncture points for the treatment of fever disease. However, acupuncture points of two methods are not same. According to Liujing(類經), Wushijiuyu(五十九兪) have used acupuncture points located in head, upper and lower extremities, trunk, and back. However Wushijiuci(五十九刺) just select acupuncture points of head and extremities without those of trunk and back. Acupuncture points located in yang meridian(45points) and Dumai(督脈, 5points) are significantly used more than those of yin meridian(8 points) and Renmai(任脈, 2points) in Wushijiuyu(五十九兪) and Wushijiuci(五十九刺). The distribution of acupuncture points used Wushijiuyu(五十九兪) have closer correlation with Fangfengtongshengsan(防風通聖散) than Wushijiuci(五十九刺) in the prescription.