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- 저자 : Kim Doo-Byong (검색결과 58 건)
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김종인,김두기,임병용 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-
This paper presents a procedure for the quality control of continuous preflex composite girder bridges through camber measurements during construction. The construction stages which require welding, balanced preflexion loads at the ends, etc. may cause unexpected large deformation of preflex girders. Furthermore, these defects can be detected by the measurements and analyses of the girder behavior, which is sometimes time-consuming. In the present study, preflex girder's camber dta at equally spaced nodes in each construction stage are obtained and analyzed for the quality control of thee span continuous preflex girder composite bridge.
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퍼지 PID 제어기를 利用한 AGV의 走行制御에 關한 硏究
김병기,김윤상,안비오,이종성,안두수 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1
The AGV(Automatic Guided Vehicle) becomes one of the most important parts in the industrial factory. Using fuzzy PID controller, we have simulated the AGV system following the guide path according to the varying velocity and experimented AGV's driving controller with microprocessor(Intel 80C196KC). In the experimental results, we compared the PID controller with the fuzzy PID controller and we can see that the performance of the fuzzy PID controller is better than that of the PID controller in the aspect of guide path tracking.
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김종인,김두기,임병용 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-
In performing a risk analysis of structures under earthquakes, it is imperative to identify the vulnerability of structures associated with various damage stages. In this paper. the risk analysis of seismic isolated LRB(lead rubber bearing) bridges considering earthquake effects is performed to assure the earthquake resisting capability of the structures. The construction method for fragility curves of seismic isolated bridges is presented and verified. An practical way for constructing the representative fragility curves is also proposed combining fragility curves of structures.
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이병택,유정호,김해두 공주대학교 자원재활용신소재지역협력센터 2000 2차년도 센터 사업 성과집 Vol.2000 No.1
반도체 폐 Si 슬러지를 이용하여 질화반응 및 post-sintering을 통해 제조된 질화규소세라믹의 미세조직 및 기계적 특성을 광학현미경, SEM 및 XRD를 이용하여 연구하였다. 상당량의 SiO2비정질상을 포함하는 폐 Si분말에서 많은 microcracks이 관찰되었다. 폐 슬러지를 사용한 Si 성형체의 질화율은 상용되고 있는 Si분말을 이용한 성형체의 값에 비해 낮은 값을 보였다. 그러나 질화온도가 증가함에 따라 질화율은 증가하였으며 1470℃에서 질화율은 98%를 보였다. 반응소결체내에 존재하는 Si3N4의 결정은 α와 β상으로 혼재되어 있으며 상당량의 산질화규소상이 검출되었다. 1950℃에서 후처리된 시료의 최대파괴인성 및 파괴강도 값은 각각 5.6 MPa · m1/2과 497 MPa로 H. C. Starck사의 Si을 이용한 것에 비해 낮은 값을 보였으며 이는 산질화규소 형성에 기인된 것으로 사료된다 The microstructures and mechanical properties of Si3N4 ceramics produced by nitridation and post-sintering using semiconductor-waste-Si sludge were investigated. Lots of microcracks were observed in the waste-Si powders which contained some amounts of amorphous SiO2. The nitridation rate of waste-Si compacts showed lower value than that of commercial Si powder compacts. The nitridation rate was increased with increasing nitridation temperature and then the percent of nitridation at 1470℃ showed 98%. The phases of Si3N4 in the reaction-bonded bodies were mixed with α and β-type, and small amounts of Si2N2O phase while those after post-sintering were β-Si3N4 and O'-Sialon. The sample post-sintered at 1950℃ showed the fracture toughness of 5.6 MPa · m1/2 and the fracture strength of 497 MPa which were lower than those of sintered body using commercial Si powder possibly due to the formation of O'-Sialon phase.
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이병택,김해두,유정호 공주대학교 자원재활용 신소재 연구센터 1999 1차년도 센터 성과집 Vol.1999 No.-
반도체 폐 Si슬러지를 이용하여 질화반응 및 post-sintering을 통해 제조된 질화규소세라믹의 미세조직 및 기계적 특성을 광학현미경, SEM 및 XRD를 이용하여 연구하였다. 상당량의 SiO₂비정질상을 포함하는 폐 Si분말에서 많은 microcracka이 관찰되었다. 폐 슬러지를 사용한 Si 성형체의 질화율은 상용되고 있는 Si분말을 이용한 성형체의 값에 비해 낮은 값을 보였다. 그러나 질화온도가 증가함에 따라 질화율은 증가하였으며 1470℃에서 질화율은 98%를 보였다. 반응소결체내에 존재하는 Si₁N₄의 결정은 α와 β상으로 혼재되어 있으며 상당량의 산질화규소상이 검출되었다. 1950℃에서 후처리된 시료의 최대파괴인성 및 파괴강도 값은 각각 5.6 MPa로 MPa로 H. C. Starcktk사의 Si을 이용한것에 비해 낮은 값을 보였으며 이는 산질화규소 형성에 기인된 것으로 사료된다. The microstructures and mechanical properties of Si₁N₄ceramics produced by nitridation and post-sintering using semiconductor-waster-SI sludge were investigated. Lots of microcracks were observed in the waste-Si powders which contained some amounts of amounts of amorphous SiO₂. The nitridation rate of waste-Si compacts showed lower value than that of commercial Si powder compacts. The nitridation rate was increased with increasing nitridation tempera ture and then the percent of nitridation at 1470℃ showed 98%. The phases of Si₁N₄in the reaction-bonded bodies were mixed wit αand β-type, and small amounts of Si₂N₂phase while those after post-sintering were β-Si₁N₄and α-Sialon. The sample post-sintered at 1950℃ showed the fracture toughness of 5.6 MPaㆍm1/2 and the fracture strength of 497 MPa which were lower than those of sintered body using commercial Si powder possibly dur to the for-mation of α-Sialon phase.
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박두순,공용해,김병수 순천향대학교 1992 논문집 Vol.15 No.1
This paper presents an effective synchronization algorithm, It is different from the existing synchronization methods by inserting appropriate synchronization instructions between statements according to different kinds of data dependences. Much efforts and interesting achievements about parallel execution of loop have been made, but they are not applicable to the cases of nested loops or irregular loops. In this paper, we focus on the solution of parallel execution of general loops introduce a new method on synchronization for parallel execution of loops.
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