• Proceedings of the KWS Conference
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• 2002.05a
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• pp.149-151
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• 2002

In this study, a formula for thermal processing induced plate deformations, in terms of process parameters such as heat input and plate thickness, is developed analytically using an infinite laminated plate theory to consider cuboidal inclusion with an eigenstrains. When a plate has arbitrary heating lines, complex deformed shape of plate was calculated by the method estimating plate deformation proposed by this study. To make a curved surface of the ship hull, the line heating method is mainly used. Application in automatization of line heating was deliberate by using proposed method.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2003.06a
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• pp.193-196
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• 2003

시공간 빔포밍 기술은 기존의 배열 안테나가 공간만의 처리를 해온 것에 대하여 이를 시간 영역으로까지 확장하여 특정한 방향에서 특정한 시간에 도착하는 다중경로는 증폭하고 다른 다중경로는 제거하는 것을 의미한다. 본 논문은 배열 안테나를 가진 DS-CDMA에서 시스템 파라미터 부정합이 존재할 때, 시공간 빔 형성기의 성능에 대하여 연구하였다. 시뮬레이션 결과, 부정합이 존재할 때 전통적인 빔포머가 상대적으로 강인함을 보였지만 원근 문제는 해결할 수 없었으며, 실제의 추정 결과를 적용했을 때는 MUSIC 시공간 빔포머가 가장 우수한 성능을 보였다.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2000.08a
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• pp.189-192
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• 2000

A fuzzy controller for the evaluation of the quantization parameters in the H.263 coder has been introduced. We adopted a Mamdani fuzzy controller with centroid defuzzification. The inputs are variance, entropy, current motion vector and previous motion vector. This results is obtained a effective rate control technique using fuzzy Quantization.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1457-1460
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• 2013

We propose a flexible camera calibration system for mobile platform to calibrate the camera's intrinsic parameters which based on the geometrical property of the vanishing points determined by two perpendicular groups of parallel lines. The system only requires the camera to observe a rectangle card show at a few(at least four)different orientation. The experimental results of the real images show the proposed calibration system in this paper is easy to use and robust.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.779-782
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• 2010

Self-calibration에서 3차원 좌표의 복원은 호모그래피 행렬 H를 계산하면 얻을 수 있다. 이 호모그래피 행렬을 얻는 방법은 dual absolute quadric, Kruppa Equation(dual conic), plane at infinity(modulus constraint)를 사용하는 방법과 같이 세 가지 방법이 일반적으로 사용된다. 제안하는 방식은 dual absolute quadric을 사용한다. 카메라 내부 속성이 모든 뷰에서 동일하고 비틀림이나 영상의 원점이 중심이라는 가정을 두고 호모그래피 행렬 H를 계산한다. 실험을 통해서 주어진 가정으로 정밀한 복원이 가능함을 보였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.59-61
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• 2011

이 연구는 인간의 이동을 모델링 하는 과정에서 고려되어야 하는 심리학적 요소를 파악하고 이를 분석하여 인간의 이동경로 예측 및 모델링의 정확도를 높이는 기초적 파라미터를 확보함에 그 목적이 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2024.05a
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• pp.457-458
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• 2024

배터리의 상태 추정 알고리즘은 전기차의 성능과 안정성 관련 핵심 기술이다. SOC(state of charge) 알고리즘은 배터리의 충전 상태를 추정하는 역할을 한다. 본 논문에서는 SOC 알고리즘의 MIL(Modeling in the Loop) Test 과정에서 사용되는 파라미터의 오차와 영향에 대한 고찰을 제시한다.

• Earthquakes and Structures
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• v.16 no.2
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• pp.197-208
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• 2019

The objective of this study is to propose new seismic intensity parameters based on the Hilbert spectrum and to associate them with the seismic damage potential. In recent years the assessment of even more seismic features derived from the seismic acceleration time-histories was associated with the structural damage. For a better insight into the complex seismic acceleration time-history, Hilbert-Huang Transform (HHT) analysis is utilized for its processing, and the Hilbert spectrum is obtained. New proposed seismic intensity parameters based on the Hilbert spectrum are derived. The aim is to achieve a significant estimation of the seismic damage potential on structures from the proposed new intensity parameters confirmed by statistical methods. Park-Ang overall structural damage index is used to describe the postseismic damage status of structures. Thus, a set of recorded seismic accelerograms from all over the word is applied on a reinforced concrete frame structure, and the Park-Ang indices through nonlinear dynamic analysis are provided and considered subsequently as reference numerical values. Conventional seismic parameters, with well-known seismic structural damage interrelation, are evaluated for the same set of excitations. Statistical procedures, namely correlation study and multilinear regression analysis, are applied on the set of the conventional parameters and the set of proposed new parameters separately, to confirm their interrelation with the seismic structural damage. The regression models are used for the evaluation of the structural damage indices for every set of parameters, respectively. The predicted numerical values of the structural damage indices evaluated from the two sets of seismic intensity parameters are inter-compared with the reference values. The numerical results confirm the ability of the proposed Hilbert spectrum based new seismic intensity parameters to approximate the postseismic structural damage with a smaller Standard Error of Estimation than this accomplished of the conventional ones.

• Tribology and Lubricants
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• v.23 no.6
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• pp.301-305
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• 2007

The wear particle analysis has been known as very effective method to foreknow and decide a moving situation and a damage of machine parts by using the digital computer image processing. But it was not laid down and trusted to calculate shape parameters of wear particle and wear volume. In order to apply image processing method in the foreknowledge and decision of lubricated condition, it needs to verify the reliability of the calculated data by the image processing and to lay down the number of images and the amount of wear particle in one image. In this study, the lubricated friction experiment was carried out in order to establish the optimum image capture with the SM45C specimen under experiment condition. The wear particle data were calculated differently according to the number of image and the amount of wear particle in one image.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2005.11a
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• pp.274-277
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• 2005

Panning is the way in which to realize a spatial sound in MIDI by moving sound images by the loudness of each channel. However, there is a limitation for the natural spatial sound. The HRTF (Head Related Transfer Function) has been widely known as one of the ways to realize spatial sound using the two channels, but it needs much processing power. It is very hard to implement a real time processing structure. In this paper, we propose an improved 3D sound model for the spatial sound location by changing the acoustic parameters. We could get a good result from the experiment with MIDI Pan and our Model.