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윤종렬,김호 한국유기농업학회 2005 韓國有機農業學會誌 Vol.13 No.1
This study was focused on the system of regional resource circulation(RRC) of Asan-Si as a case region. So 301 farmers(members of producer organization) who are managing environmental-friendly agriculture(EFA) are surveyed. The RRC system is focused on establishing the system of regional complex farming connected with the seedling farming and the livestock. The main results surveyed are as follows : First, total cultivated acreage is 574ha. Second, the total quantity of by-products of rices, beans, wheats is 983M/T. Third, the total quantity of nutrient requirement for seedling farming is 85,335.6kg This research shows how to develop the RRC system for EFA. The development model and strategies are as follows : The first model for the system of regional resource circulation can be called the scenario of the best output for the system of environmentally friendly resource circulation. It is considered to estimate the appropriate number of heads of Korean cattle and hen which can be bred simultaneously. And the second model can be called the scenario of the regional allotment for the appropriate number of heads of those. It is considered to estimate the appropriate number of heads of those which can be alloted by the individual farm or area.
Effectiveness of the Electrode Arrays for Delineating 2-D Subsurface Structure
윤종렬,이기화,Yoon, Jong-Ryeol,Lee, Kiehwa The Korean Society of Economic and Environmental G 1996 자원환경지질 Vol.29 No.3
2차원 지하구조를 해석함에 있어 1차원 역산에 근거한 수직탐사자료 해석의 타당성과 수평탐사에 있어 여러가지 전극배열법의 효율성이 연구되었다. 수직암맥, 판상기둥, 매몰수직단층, 램프 (ramp), 복합구조와 같은 2차원 모델로부터 유한차분법을 이용하여 3 포인트, 쌍극자, 베너 (Wenner), 슐럼버저 (Schlumberger) 수평탐사의 겉보기비저항 곡선을 구하고 이를 비교 분석하였다. 수직탐사의 경우에는 슐럼버저와 베너 배열법에 대하여 1차원 역산자료를 내심하여 얻은 자료로부터 2차원 단면도를 구하여 비교하였다. 이러한 2차원 단면도는 각 모델에 대하여 비저항의 수칙, 수평적인 경계면을 잘 보여주고 있다. 또한 슐럼버저 수평탐사의 겉보기 비저항 곡선은 수직적인 비저항의 경계면을 잘 보여주고 있다. 전반적으로 수직, 수평 전기탐사의 경우에 있어 슐럼버저 배열법이 다른 전극배열법보다 우수한 결과를 보여주고 있다. 본 연구로부터, 1차원 역산에 근거한 2차원 지하구조의 해석이 가능함을 알 수 있다. The effectiveness of various electrode configurations in horizontal mappings and 1-D inversions of vertical sounding data for delineating 2-D structures was studied. Apparent resistivity values of three point, dipole-dipole, Wenner, and Schlumberger mappings were simulated for such structures as vertical dyke, tabular prism, buried vertical fault, ramp and complex structure by finite difference method (FDM) and they were compared with each other. Also 2-D cross sections for three structures obtained by interpolation of 1-D inverted sounding data in terms of three layers were compared for Schlumberger and Wenner arrays. On these cross sections, horizontal and vertical resistivity interfaces of the 2-D structures are revealed relatively clearly. Apparent resistivity curves of Schlumberger mapping show vertical resistivity discontinuities very well. On the whole, Schlumberger array is superior to the other arrays in electric sounding as well as mapping. This study clearly indicates that interpretations of 2-D structures based on 1-D inversion are possible.
유전자 알고리즘을 이용한 Geodesic Dome 구조물의 토폴로지 최적설계
尹鍾烈,洪承杓 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-
A parameteric study on the design of optimal dome structures using a genetic algorithm(GA) is investigated. In a design, preferences for the dome shapes and costs are considered. The optimal design criteria for the dome are the selection of the dome shape, height, number of divisions and layers for the dome, and sectional areas for members. The size of the initial population, probability of crossover and mutation play crucial roles in GA because the algorithm searches globally and stochastically over the solution domain. The elitist preserving selection method is used and thus the reproduction process is not included. The fitness function involves items about total weight, stress of members, vertical displacement of joints, preferences for the dome shapes and costs due to joints. A computer program named GAODD(GA for Optimal Dome Design) is developed. A space truss design problem is used to verify the results from GAODD and to suggest values of parameters in GA. This study shows that the suggested parameters may be used in optimization problems such as space truss designs that account other conditions.
진동수가 큰 모드데이터를 이용한 트러스 구조물의 시스템 식별 및 손상추정
尹鍾烈,金成鉉 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-
A method for identifying the element properties of a truss structure is developed. In the study, the measured natural frequencies and modal shapes of the truss are used. The equation error including unknown parameter is constructed from the dynamic model. To analyze the inverse problem, the least square method is used. The inverse problem model is then formulated as a linear simultaneous equation and unknown parameters are estimated without complex iteration processes. Since it is difficult to obtain all modal data of a structure, the estimation of unknown parameters using limited modal data is studied. In selection of modal data, high modal data which is sensitive to the variation of parameters are selected. Through the suggested method, accurate parameters and damage of a truss structure are identified and detected.