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Rahmen 移動支点에 摩擦係數를 考慮한 처짐의 影響에 對한 考察
李圭遠 大田工業高等專門學校 1969 論文集 Vol.5 No.-
The Roller Support spoken generally is the ideal Roller without friction. but the real structure has an intermediate character between the Roller Support and the Fixed Support, on account of invading of rain and dust. Therefore, I studied in this thesis the influences of the deflection by means of the principle of virtual work, considering the difference of when we think of the coefifcient of friction and when we don't think of it.
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李奎遠,柳熙仲,梁昌容 全北大學校 1995 論文集 Vol.39 No.-
A discrete formulation of the optimum design structures is developed and methods of solution are presented. The design problem is the allocation of member sizes from catalog of commercially available sections within the working stress constraints, the buckling stress constraint and the displacement constraint. Multiple sets of static service loads are considered in the formulation. Constraints for optimization of truss structures is transformed into the constraint set of a successive binary programming problem. A computer program is developed for the implementation of the above formulations and algorithm. Example application include seven bar truss and ten bar truss.
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퍼지이론을 이용한 철근콘크리트 구조물의 최적설계에 관한 연구
이규원,고성곤,최병한,이희춘 전북대학교 공업기술연구소 2000 工學硏究 Vol.31 No.-
This study is concerned with the optimum design for reinforced concrete structure using the design theory of ultimate strength. Structural design is one of engineering decision making problems so that it necessarily includes various kinds of uncertainties. So far those uncertainties have been treated with the aid of probability theory. Recently, it was however, pointed out that fuzzy theory is useful in dealing with vagueness and ambiguities concerned with subjective judgement of human beings. In the formulating of the optimization problems of reinforced concrete structure by the ultimate strength design method, objective functions are formulated as the cost function including the cost of steel, concrete and frameworks for the minimum construction cost. The design variables adopted in this mathematical model consist of the sectional sizes and the areas of beam. With using fuzzy set, various optimum solutions of Reinforced concrete structure will be obtained by feasible direction method. This reinforced concrete structure is selected as the structural model in order to examine the justification, applicability and convergency of this algorithm. Accordingly, the optimization of reinforced concrete structures which utilizes the results of this study can be helpful in economical design of reinforced concrete structures. Key words : Fuzzy Theory, Reinforced Concrete, Optimum Design
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이규원,임정환,최병한 전북대학교 공업기술연구소 2001 工學硏究 Vol.32 No.-
This study aims at the analysis of the validity, utility and application of the results on optimization of the prestressed beam having the multi-objective function of minimum cost and minimum deflection which is conflicting each other in properties and the constraint which is including uncertainties by using fuzzy theory. In the formulation of optimum problems the design variables as the second objective function and the constraints consists of the fuzzy stress constraints of the prestressed beam structure. Accordingly, the optimization of prestressed beam considering fuzzy which utilizes the results of this study can be helpful in economical design of other prestressed beam.
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李奎遠 전북대학교 공업기술연구소 1974 工學硏究 Vol.2 No.-
This paper covers the research result of analysis of a infinitive beam on elastic foundation. A differential equation of elastic curve of the infinitive beam on the elastic foundation was mather-matically derived from the given boundary conditions. The research result comes to the same one in comparison with TIMOSHENKO's infinitive Beam on the elastic foundation analysis. The research result involved the general formular of the infinitive Beam on elastic foundation.
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彈性理論에 의한 Truss 構造物의 最適設計에 關한 硏究
李奎遠 전북대학교 공업기술연구소 1979 工學硏究 Vol.9 No.-
In this study a matrix set of nonlinear working stress constraints is derived by the stiffness method, following the network-topological approach and incorporating the working stress interaction condition. And then, this nonlinear constaint set is transformed into the constraint set of a successive linear programming problem using the Taylor series expansion. The formulation is greatly enhanced by evaluation the Jacecian of the constraint vector function. This study is devoted to the selection of the member sizes that the weight of structures with a fixed shape is optimized. the design process includes the satisfaction of both stress and deflection requirements. And also the objective function is obtained by considering total weight of the structures. In the design example, the numerical aproach is employed to find the opeimum values by computer and its results are discussed.
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이규원,지재원,천현우,육상조,이극 보안공학연구지원센터 2010 보안공학연구논문지 Vol.7 No.6
노트북, 넷북, 스마트폰 등 다양한 무선인터넷을 지원하는 각종 단말기들이 생겨나면서 무선인터넷에 관한 기술들이 많이 나오고 있다. 그리고 각종 카페와 공공장소에서도 무선인터넷을 사용가능하도록 AP(Access Point)가 설치되고 있다. 그러나 사용하기 편리한 반면 해킹의 위협은 유선인터넷보다 더 크다. 본 논문에서는 무선 환경에서 트래픽 분석을 통하여 침입을 탐지할 수 있는 트래픽 분석 기법을 제안한다.
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李甲湘,成洛道,李圭源 圓光大學校 1976 論文集 Vol.10 No.-
콩나물의 生育과 成分 變化를 感計하기 위해 콩을 실내(21∼25℃)에서 5日동안 재배하였던바 다음과 같은 결과를 얻었다. 1. 콩나물은 生長하감에 따라 水分含量 및 重量은 증가되었다. 2. 재배동안의 조지방과 환원당량은 콩나물의 성장과는 반대로 감소되었으나 조단백질량은 별로 차가 없었다. 3. Aspergillus saito의 protease에 의한 分解率은 콩보다 콩나물이 높았다. 그러나 콩을 콩나물로 재배시의 조단백질의 변화는 별로 없었으나 生化學的으로 生體에 利用될 수 있는 단백질의 함량의 變化를 究明하기 위한 硏究는 계속 추구해 보아야 하겠다고 思料된다. Soybeans were germinated in teh dark at 21-25℃ for 5 days, to study on the compositioin of soybean sprouts. The results are summarized as follows; 1. The growing rate, weight and moisture content in the soybean sprouts were increased throughout the germination period(5 days). 2. The crude fat content and the reducing sugar content were decreased irreversibly to its growing rate throughout the germination period (5 days), while the crude protein content was remained almost constant. 3. The decomposition rate of the soybean sprout by the protease of Aspergillus saito was higher than that of the soybean.
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