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잣나무 임분 생장예측을 위한 거리독립 시뮬레이션모델 개발
권순덕 ( Kwon Sun Deog ),정주상 ( Jeong Ju Sang ) 한국산림과학회 2004 한국산림과학회지 Vol.93 No.1
The objective of this study was to develop an individual-tree distance-independent growth simulation model for Pinus koraiensis Stands. The simulation model was developed to integrate the four equations, needed to estimate crown ratio, potential diameter growth, modifier and mortality rate, into a user friendly interface modules. In order to investigate the performance of the simulation model, the model was used in predicting growth of a 17-year-old Pinus hraiensis stand for 10 years from age 20 to 30. The results of the simulation showed that the average DBH of the stand increased by 4.l㎝. stand volume increased by 109.5㎥/ha and the percentage of the volume increase by Pressler equation was about 7.4. Also, stand density decreased by 598 trees/ha or 38% due to mortality.
산림기능유형별 잠재력 평가를 위한 주요 산림입지환경인자의 상대적 중요도 분석
김형호 ( Kim Hyeong Ho ),정주상 ( Jeong Ju Sang ),김종호 ( Kim Jong Ho ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.4
This study was conducted to determine the relative importance of forest environmental factors in evaluating the potential of forest lands for forest functions. The forest function types and the environmental factors were determined through forest-specialists questionnaire survey. According to the results of the survey, forest functional types were classified into such six functions as timber production, stable supply of water resources, forest hazards prevention, recreation, promotion of living-environment and conservation of natural environment. Friedman test was used to evaluate the differences among groups for priority orders and the weights of evaluation factors, and then Tukey test was used for grouping among them.
10학년 과학교과서와 차세대 과학교과서의 지구 영역 비교 분석
조규성 ( Kyu Seong Cho ),양송이 ( Song I Yang ),김재영 ( Jae Young Kim ),정주상 ( Ju Sang Jeong ) 전북대학교 과학교육연구소 2012 科學敎育論叢 Vol.37 No.-
본 연구의 목적은 차세대 과학교과서와 10학년 과학교과서의 지구과학 영역을 비교 분석해 보고 개선방향을 연구하는데 있다. 연구 결과는 다음과 같다. 전체 단원에 대한 지구 단원의 비중을 분석한 결과 차세대 과학교과서가 26.93%로 나타나 기존 교과서에 비해 높은 값을 보였다. 지구 영역의 전체 면수에 대한 그림, 표, 보충자료의 비율을 조사한 결과, 차세대 과학교과서가 기존 교과서에 비해 그림과 표의 비율은 적고 보충자료의 비율은 늘어난 것으로 나타났다. 또한 차세대 교과서는 기존 교과서에 비해 크고 선명한 사진자료와 다양한 용어가 제시되어 있다. The purpose of this research is to compare and analyze the earth science domain of a next-generation science textbook with that of a 10th grade science textbook in order to study possible improvements that can be made. The results of this research are as follows: According to the results of analyzing the load of chapters on Earth out of all the chapters the ratio was 26.93% with the new-generation science textbooks which showed a high value relative to previous textbooks. And the results of studying the ratio of diagrams tables and supplementary documents regarding the total number of pages on the Earth domain the ratios of diagrams and tables have decreased for the next-generation science textbook while the ratio of supplementary data has increased. Furthermore the next-generation textbooks provide clearer photographs and more diverse terms in comparison to the existing textbooks.
잣나무 임분의 개체목간 거리독립 생장 및 고사 예측함수의 개발
권순덕 ( Kwon Sun Deog ),김형호 ( Kim Hyeong Ho ),정주상 ( Jeong Ju Sang ),이경학 ( Lee Gyeong Hag ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.6
The objective of this study was to develop a set of stand growth equations for estimating crown ratio, potential diameter growth, modifier and mortality of Pinus koraiensis forest stands. The four equations are essential in interpreting the dynamic changes, over time, in timber inventory of forest stands. In order to infer the parameters of the equations, used were forest measurement data sets of 26,800 standing trees of 266 plots and 175 dead trees of 6 permanent plots. Test statistics indicated that fitness indices(F1) of modifier and mortality probability functions were 0.515 and 0.842, respectively. On the other hand, the fitness indices of crown ratio and potential diameter growth functions were 0.224 and 0.260, respectively, and relatively lower than those of modifier and mortality probability functions.