• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1618-1628
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• 2011

The Train Diagnostic and Control System(TDCS) has been equipped on the modern Metro Vehicle, Locomotive and High Speed Train. The main purpose of this system is to support the identification of train status by real-time, the fast action against such failure events during revenue service and the fast convenient maintenance processes. Some of newest TCMS, a kind of control and monitoring system, has participated in the main control functions such as pantograph up and down, powering and braking command and so on. But these kind of control functions of the high speed train which has the operating speed over 300km/h are conducted by the train electrical logic circuits. The KTX-I and KTX-II - the local high speed train, are the typical example. The next generation TDCS for the ongoing project of distributed high speed train(HEMU) is designing with the target to increase main train control functions, to increase the reliability/avalibility and to increase the convenient driving. This paper introduces the overall configurations and functions of the new generation TDCS.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제16권12호
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• pp.1219-1223
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• 2010

본 논문은 모션 속도와 다수의 초기 중심점에 기반한 빠른 모션 추정 알고리즘을 제안한다. 제안한 방법은 시공간적 이웃 모션 벡터들에 의해 초기 탐색점을 예측한다. 모션벡터를 빠르게 구하기 위하여 모션 속도와 예측된 초기 중심점들에 기반한 동적인 탐색 패턴이 이용된다. 제안한 방법은 시공간 정보와 동적 탐색 패턴을 이용하여 탐색 속도를 매우 빠르게 할 뿐만 아니라 양질의 영상화질을 유지할 수 있다. 실험결과를 통해 제안한 방법이 완전 탐색, 새로운 삼단계 탐색, 사단계 탐색 방법들과 비교하여 검색시간을 줄이면서 PSNR 관점에서 양질의 영상화질을 제공함을 알 수 있다.

• 한국해양공학회지
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• 제20권3호
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• pp.82-87
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• 2006

An approach to model a high-speed monohull vessel is introduced. The high-speed monohull form belonging to the category of multihull is drawing new attention, due to the rapidly growing trend of fast passenger ships and military purpose. Multihull forms are much thinner in their overall shape, compared to those of the conventional commercial vessels. Moreover, the parent hull forms are not readily obtainable when a new design is intended, which makes it hard to perform various technical calculations in terms of hull optimization, hydrodynamic computation, structural design, and so forth. In this paper, a parametric technique is used to design a high-speed hull form. To model a hull form, NURBS (Non Uniform Rational B-Spline) representation is used. The goal of research is to provide a fast and convenient tool to design an initial hull form with fewer parameters available in the early design stage. The technique employed in this paper will be applied to the design of multihull forms, such as catamaran, trimaran, and semi-swath.

• 한국항공우주학회지
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• 제30권6호
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• pp.21-30
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• 2002

본 연구에서는 영역분할기법에 의하여 예조건화 Navier-Stokes 방정식을 병렬화 하였으며, 병렬화 된 코드의 정확도는 순차 코드의 결과 및 실험 데이터와의 비교를 통하여 확인하였다. 코드의 병렬효율은 Myrinet을 기반의 PC 클러스터와 Fast-Ethernet PC 클러스터에서 살펴보았다. 주된 성능 지표로는 프로세서 수와 네트웍 통신 구성에 따른 속도 향상 비를 살펴보았다. 이 시험에서 Myrinet 환경의 PC 클러스터는 기대한 바와 같이 Fast-Ethernet에 비하여 우수한 성능을 보여 주었다. 문제의 크기에 대한 의존도 시험에서 네트웍 통신 속도는 병렬처리 성능에 중요한 요소이며, Myrinet 기반의 PC 클러스터가 고성능 병렬처리 시스템의 한 가지 대안임을 보여 주었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.52-55
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• 1997

This paper discusses an automatic visual-servoing system, in which a laser and a CCD camera are used for imaging the pattern of joint groove. The algorithm used here is simple and robust to find out the gap width and gap center. As a consequence, the speed of algorithm is very fast and optimized. A feature of this system is that it processes only by summing the vertical line and horizontal line of screen without any image preprocessing in order to get the energy information of lines alternatively. It is practical and useful for the system requiring a fast process time of vision.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.45-48
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• 2005

In this paper, we propose a new fast running FIR filter structure that improves the convergence speed of adaptive signal processing and reduces the computational complexity. The proposed filter is applied to wavelet based adaptive algorithm. Actually we compared the performance of the proposed algorithm with other algorithm using computer simulation of adaptive noise canceler based on synthesis speech. As the result, We know the proposed algorithm is prefer than the existent algorithm.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2007년도 춘계학술발표대회
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• pp.860-861
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• 2007

The Pulse Coupling Oscillator (PCO) is a synchronicity model inspired by nature. However, the PCO model has some limitations. The Fast PCO model is proposed in this paper. It addresses the problem of the phase swing actions in the original PCO model. Benefits are the fast synchronicity speed and associated energy saving.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 추계종합학술대회 논문집(2)
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• pp.91-94
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• 2000

This paper introduces the design of low-power, fast-locking delay locked-loop using complementary pass transistor logic(CPL). Low-power design has become one of the most important in the modem VLSI application. CPL has the advantage of fast speed, high density, and low power with signal buffering between stages. Based on this analysis, we concluded that the I/O performance can be beyond 500㎒, 2-poly, 2-metal 0.65$\mu\textrm{m}$, 3.3V supply.

• 전자공학회논문지B
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• 제32B권5호
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• pp.661-670
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• 1995

This paper presents a fast massively parallel automatic test pattern generator for digital combinational logic circuits using neural networks. Automatic test pattern generation neural network(ATPGNN) evolves its state to a stable local minima by exchanging messages among neural network modules. In preprocessing phase, we calculate the essential assignments for the stuck-at faults in fault list by adopting dominator concept. It makes more neurons be fixed and the system speed up. Consequently. fast test pattern generation is achieved. Test patterns for stuck-open faults are generated through getting initialization patterns for the obtained stuck-at faults in the corresponding ATPGNN.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1991년도 학술발표회 논문집
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• pp.38-41
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• 1991

RLS algorithms are required for applications to adaptive line enhancers, adaptive equalizers for voiceband telephone and HF modems, and wide-badn digital spectrum mobile raio in which their convergence time and tracking speed are significant. The fast QR RLS algorithm satisfies above the requirements. Its computational complexity is linearly proportional to the tap number of a filter, N and its performance remains numerically stable. From the result of simumulation, the fast QR RLS algorithm represented Cioffi is better than gradient based algorithm in its initial performance when being applied to an adaptive line enhancer for cancelling noise.