• 한국연소학회:학술대회논문집
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• 한국연소학회 제26회 KOSCO SYMPOSIUM 논문집
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• pp.119-127
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• 2003

In this study we propose an unsteady I-dimensional model of bed combustion with multiple solid phases, which confers a phase on each solid material. This model can be applied to a variety of bed combustion cases of various configurations and ignition methods. It contains fuel combustion, gaseous reaction, heat transfers between each phase, and geometric changes of the solid particles. An iron ore sintering pot is selected for verifying the model validity and simulation results are compared with the limited experimental data set of various coke contents and air supply rates. They predict the experimental results well and show applicabilities to the various system of the fuel bed with various solid materials.

• 한국인터넷방송통신학회논문지
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• 제10권6호
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• pp.145-152
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• 2010

본 연구에서는 시계열 자료를 베이지안 정보기준을 통해 클러스터링 한다. 보다 안정적인 클러스터를 생산하기 위해 다중 중심점을 모델링한 후 이를 이용하여 클러스터를 생성시킨다. 대상 시계열 자료에 대해 예측할 경우 클러스터에 속한 시계열 자료 중 가장 유사한 시계열 자료를 선택하여 모델링한다. 모델로부터 마코프 규칙을 유도해 내고 이 규칙을 이용해 예측정확도를 측정한다. 시계열 자료를 단독으로 모델링한 후 예측한 결과보다 클러스터에 속한 유사시계열 모델링을 통한 예측정확도가 좀 더 높았음을 확인하였다.

• 대한인간공학회지
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• 제18권2호
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• pp.57-69
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• 1999

The primary objective of this research was to suggest the design dimensions of automotive seating package that has an important effect upon seating package design. To conduct the research, a set of manikin dimensions that are representative for Korean was determined by using a statistical scheme. With these dimensions, we generated nine manikins for male and female, respectively. Also, the preferred driving posture was investigated using the experimental setup. To find each joint angle for subjects, a driving monitoring system was developed and a three dimensional motion analysis system was employed. The joint angle for the subject was established and compared with related literature. With the generated manikins and each joint angle, the driving posture was simulated by using SAFEWORK that is a program to generate manikins. The positions and adjustable ranges from the accelerator heel point to the hip point and the steering wheel center point that are important variables in order to design seating package were suggested. Further research is needed to determine the seating package dimensions three dimensionally.

• 전자공학회논문지B
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• 제29B권4호
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• pp.36-47
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• 1992

In this paper, a set of TM(template matching) mask using the AM(associative mapping) technique was generated and the edge detection algorithm for a SAR image was proposed. And also, the performance of the proposed edge detection algorithm was tested with the conventional edge detection techniques. The proposed edge detection algorithm created an edge image which was more accurate and clear than the conventional edge detection techniques and the performance of the proposed detection technique was not deteriorated for low intensity area in the image because the uncertainly thresholded value genetated by the conventional detection methods was requested. Also, the number of masks and the detection time were reduced by adjusting resolution of edge detection and the consideration for the threshold value extracting the edge was very intuitive.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1993년도 학술논문발표회 논문집 제12권 1호
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• pp.201-205
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• 1993

A decision-theoretic concept is introduced to investigate whether targets of interest in array sensor systems are present at some steering direction or not. The solutions to this problem are described as a set of simple numbers 0 or 1 corresponding to the direction under consideration. This coded number representation is transplanted in the optimisation technique based on the Hopfield neural network, which may provide a new aspect of determining the direction of arrival (DOA) of sources. To cast the perspectives of the proposed approach and illustrate its effectiveness in source direction finding in array sensor systems, simulation results and related discussions are presented in this paper.

• ETRI Journal
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• 제37권1호
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• pp.118-127
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• 2015

The power consumption of 3D many-core processors can be reduced, and the power delivery of such processors can be improved by introducing voltage island (VI) design using on-chip voltage regulators. With the dramatic growth in the number of cores that are integrated in a processor, however, it is infeasible to adopt per-core VI design. We propose a 3D many-core processor architecture that consists of multiple voltage clusters, where each has a set of cores that share an on-chip voltage regulator. Based on the architecture, the steady state temperature is analyzed so that the thermal characteristic of each voltage cluster is known. In the voltage scaling and task scheduling stages, the thermal characteristics and communication between cores is considered. The consideration of the thermal characteristics enables the proposed VI formation to reduce the total energy consumption, peak temperature, and temperature gradients in 3D many-core processors.

• Computers and Concrete
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• 제14권6호
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• pp.711-725
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• 2014

The purpose of this study is to evaluate the behavior and the strength of SRG (Steel Reinforced Grout) externally strengthened Reinforced Concrete (RC) beams by using a nonlinear numerical analysis. The numerical simulation was carried out by using a three-dimensional (3D) finite element model. An interface element with a suitable damage model was used to model the connection between concrete surface and SRG reinforcing layer. The reliability of the finite element 3D-model was checked using experimental data obtained on a set of three RC beams. The parameters taken into consideration were the external configuration, with or without U-end anchorages, the concrete strength, the amount of internal tensile steel reinforcement. Conclusions were made concerning the strength and the ductility of the strengthened beams by varying the parameters and on the effectiveness of the SRG reinforcing system applied with two types of external strengthening configuration.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2005년도 제24회 춘계학술대회논문집
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• pp.233-236
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• 2005

본 논문에서는 현재 개발 중인 스마트 무인기 연료 시스템의 기본설계 결과를 제시하고 이에 대한 신뢰도 분석을 수행하였다. 시스템 요구를 바탕으로 연료 시스템을 구성한 후, 이에 필요한 부스트 펌프, 제트펌프, 도관, 벤트 시스템 등 각 구성품에 대한 설계를 수행하였고 연료 시스템의 중량 예측을 수행하였다. 이를 바탕으로 연료 시스템의 신뢰도를 분석하였다.

• 한국항만경제학회지
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• 제21권4호
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• pp.103-119
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• 2005

For the selection of attraction industry of foreign investment in the free trade zone of Gwang Yang Bay, an overall consideration should be made considering aspects such as the industry development strategy of Gwang Yang Bay and the regional industry development strategy of the local government. For Gwang Yang Bay to grown into the E-Hub Port of Northeast Asia, the development of the back zone of should be accelerated. There is a need to offer custom made incentives for the core businesses. Packaging is a field of combined science and a future industry. Packaging industry, which has close association with regional industry and regional college's research human resources, should be combined with design and set up a packaging industry complex.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.265-267
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• 2004

A blind separation problem in a multiple-input-multiple-output (MIMO) linear time-invariant (LTI) system with finite-alphabet inputs is considered. A discrete-time matrix equation model is used to describe the input-output relation of the system in order to make full use of the advantages of modern digital signal processing techniques. At first, ambiguity problem is investigated. Then, based on the results of the investigation, a new identifiability condition is proposed for the case of an input-data set which is widely used in digital communication. A probability bound such that an arbitrary input matrix satisfies the identifiability condition is derived. Finally, Monte-Carlo simulation is performed to demonstrate the validity of our suggestions.