• Title/Summary/Keyword: T'-system

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차상제어시스템 엔지니어링 설계 (An Engineering Design of On-Board Computer System)

  • 이주훈;이재덕;조창희;박도영;김국헌;김용주
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.1433-1435
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    • 2000
  • Currently KERI is participating a project whose goal is to develop the Korean High-Speed Train(KHST) with maximum speed of 350kph. KERI's responsibility is the electrical system engineering that includes engineering design of an on-board computer system for diagnosis and control of train set and electrical/mechanical devices. A system engineering approach of the design is performed in order to guarantee the passenger safety and economically viable train for on-board control system construction, operation and maintenance. This paper presents the draft engineering des on-board computer system that ensures the s and reliability of KHST. The draft is focuse network interfaced distributed processing system.

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COMPUTERIZED T-SCAN SYSTEM을 이용한 정량적 교합분석방법에 관한 연구 (A PRELIMINARY STUDY ON QUANTITATIVE ANALYSIS USING THE COMPUTERIZED T-SCAN SYSTEM)

  • 양재호
    • 대한치과보철학회지
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    • 제27권2호
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    • pp.271-277
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    • 1989
  • The purpose of this preliminary report was to describe the operating procedure of T-scan system and to identify the location, timing and force of occlusal contact in patient with normal occlusion using computerized T-scan system. From the preliminary observation , the author obtained the following results. 1. T-scan system displayed 2 dimensional and 3 dimensional description of occlusion: contact locations, timing (sequence) and forces of occlusal contacts. 2. The T-scan sensor was the most important part of the T-scan system. 3. The data of T-scan system cannot be stored in computer diskett. 4. The T-scan system is thought to be the most effective system to detect occlusal contacts and can be applied to the followings : occlusal diagnosis, occlusal equilibration, crown and bridge restorative procedures, denture adjustment, implant procedures, splint adjustment, laboratory procedures, periodontal treatment, orthodontics, TMJ treatment and patient education etc.

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조정가능한 대기모형에 {T:Min(T,N)} 운용방침이 적용되었을 때의 시스템분석 (A System Analysis of a Controllable Queueing Model Operating under the {T:Min(T,N)} Policy)

  • 이한교
    • 산업경영시스템학회지
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    • 제38권1호
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    • pp.21-29
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    • 2015
  • A steady-state controllable M/G/1 queueing model operating under the {T:Min(T,N)} policy is considered where the {T:Min(T,N)} policy is defined as the next busy period will be initiated either after T time units elapsed from the end of the previous busy period if at least one customer arrives at the system during that time period, or after T time units elapsed without a customer' arrival, the time instant when Nth customer arrives at the system or T time units elapsed with at least one customer arrives at the system whichever comes first. After deriving the necessary system characteristics including the expected number of customers in the system, the expected length of busy period and so on, the total expected cost function per unit time for the system operation is constructed to determine the optimal operating policy. To do so, the cost elements associated with such system characteristics including the customers' waiting cost in the system and the server's removal and activating cost are defined. Then, procedures to determine the optimal values of the decision variables included in the operating policy are provided based on minimizing the total expected cost function per unit time to operate the queueing system under considerations.

IoT 센서 시험 운용 시스템 설계 및 구현 (A Design and Implementation of Testing and Management System for IoT Sensors)

  • 채성윤;박진희
    • 한국인터넷방송통신학회논문지
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    • 제16권5호
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    • pp.151-156
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    • 2016
  • IoT 기술이 발전하면서 주변 환경 정보 수집을 위해 사용 가능한 센서는 종류와 수가 급격히 증가하고 있다. 센서의 종류가 늘어나면서 IoT 제품 및 서비스를 개발하기 위해 적합한 센서 노드를 선정하고 테스트하기 위한 효율적인 시스템의 필요성이 증가하고 있다. 본 연구에서는 IoT 서비스 및 제품 개발 기간 단축을 위한 센서 시험 운용 시스템을 제안한다. 제안하는 시스템은 IoT 센서 노드의 성능 및 기능 범위를 시험하여 제품 및 서비스의 빠른 프로토타이핑에 활용된다. 이를 위해 IoT 센서 시험 운용 시스템의 요구사항을 분석하고, 기능 요소별 설계를 기반으로 시스템을 설계한다. 마지막으로 시험 어플리케이션을 구현하여 설계한 시스템의 기능 요소를 테스트한다.

ASYMPTOTIC EQUIVALENCE IN VARIATION BETWEEN NONLINEAR DIFFERENTIAL SYSTEMS

  • Song, Se-Mok
    • Journal of applied mathematics & informatics
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    • 제12권1_2호
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    • pp.429-436
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    • 2003
  • We study the asymptotic equivalence between the nonlinear differential system $\chi$'(t) = f(t, $\chi$(t)) and its variational system ν'(t) = f$\chi$(t, 0)ν(t) by using the comparison principle and notion of strong stability.

BOUNDEDNESS IN NONLINEAR PERTURBED DIFFERENTIAL SYSTEMS VIA t-SIMILARITY

  • Im, Dong Man;Goo, Yoon Hoe
    • Korean Journal of Mathematics
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    • 제24권4호
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    • pp.723-736
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    • 2016
  • This paper shows that the solutions to nonlinear perturbed differential system $$y^{\prime}= f(t,y)+{\int_{t_{0}}^{t}g(s,y(s))ds+h(t,y(t),Ty(t))$$ have bounded properties. To show the bounded properties, we impose conditions on the perturbed part ${\int_{t_{0}}^{t}g(s,y(s))ds,\;h(t, y(t),\;Ty(t))$, and on the fundamental matrix of the unperturbed system y' = f(t, y) using the notion of h-stability.

BOUNDEDNESS IN FUNCTIONAL PERTURBED DIFFERENTIAL SYSTEMS

  • Im, Dong Man;Goo, Yoon Hoe
    • 충청수학회지
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    • 제28권4호
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    • pp.499-511
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    • 2015
  • This paper shows that the solutions to the perturbed dierential system $$y^{\prime}=f(t,y)+{\int}_{t_o}^{t}g(s,y(s))ds+h(t,y(t),Ty(t))$$ have bounded property. To show this property, we impose conditions on the perturbed part ${\int}^{t}_{t_o}g(s,y(s))ds+h(t,y(t),Ty(t))$ and on the fundamental matrix of the unperturbed system y' = f(t, y).

ON GENERALIZED FLOQUET SYSTEMS II

  • EI-Owaidy, H.;Zagrout, A.A.
    • Kyungpook Mathematical Journal
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    • 제27권1호
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    • pp.35-41
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    • 1987
  • Consider the system (i) x'=Ax. Let ${\Phi}$ be its fundamental matrix solution. If there is w>0 such that A(t+w)-A(t) commutes with ${\Phi}$ for all t, then we call this system a "generalized" Floquet system or a "G. F. system". We show that $A(t+w)-A(t)=B_1$=constant if and only if $A(t)=C+B_1t/w+Q(t)$, Q is periodic of period w>0. For this A(t) We prove that if all eigenvalues of $B_1$ have negative real parts, then the origin is asumptotically stable. We find a growth condition for a continuous D(t) which guarantees that all solutions of z'=[A(t)+D(t)]z are bounded if all solutions of the G. F. system (i) are bounded. Combining the foregoing results yield a class of perturbed G. F. operators all of whose solutions are bounded.

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CNC T-BAR 형상제어 시스템을 활용한 비정형 건축물의 곡면 파사드의 시공사례 검토 (Review of Freeform Buildings using CNC T-BAR System)

  • 김성진;박영미;박정준
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2017년도 춘계 학술논문 발표대회
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    • pp.58-59
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    • 2017
  • Through the case study, we surveyed the performance of a CNC-T BAR system on irregular-shaped building construction project. By CNC T-BAR system, we mean a surface curvature control system has been used in aircraft and ship manufacturing by controlling entire surface points on shape. For the past 10 year, the number of irregularly-shaped building design and construction project has been increased, and also the studies on irregular-shaped construction methods have been conducted. However, the previous studies did not review on the performance of the CNC T-BAR system. We collected construction-completed cases in Korea, which applied the CNC T-BAR system, and we studied its performance by comparing with a segment system in terms of construction duration and its quality. The result shows that the CNC T-BAR system can shorten the construction duration comparing with segment-assembly system while maintaining high quality. The CNC T-BAR system is expected to apply on the more number of irregularly-shape building construction project.

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IoT 서비스 플랫폼을 위한 리눅스 FUSE 기반 가상 파일 시스템 (A Virtual File System for IoT Service Platform Based on Linux FUSE)

  • 이형봉;정태윤
    • 대한임베디드공학회논문지
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    • 제10권3호
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    • pp.139-150
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    • 2015
  • The major components of IoT(Internet of Things) environment are IoT devices rather than the conventional desktop computers. One of the intrinsic characteristics of IoT devices is diversity in view of data type and data access method. In addition, IoT devices usually deal with real-time data. In order to use such IoT data for internal business or cloud services, an IoT platform capable of easy domain management and consistent data access interface is required. This paper proposes a Linux FUSE-based virtual file system connecting IoT devices on POSIX file system view. It is possible to manage IoT domain with the native Linux utilities such as mkdir, mknod, ls and find in the file system. Also, the file system makes it possible to access or control IoT devices through POSIX interface such as open(), read(), write() or close() without any separate APIs or utilities. A test result shows that the management performance of the file system is lower than that of linux file system negligibly.