• 제목/요약/키워드: Programming characteristics

검색결과 545건 처리시간 0.025초

파워트레인 제어 시뮬레이션을 위한 MATLAB/SIMULINK 상에서의 객체지향 프로그래밍

  • 양경진;최재원;홍금식
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 춘계학술대회 논문집
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    • pp.208.1-212
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    • 1997
  • In this paper, a computer simulation tool for evaluting integrated engine/transmission control system using MATLAB/SIMULINK is investigated. Since a modular programming technique based upon the object-oriented programming is used in the paper, the simulation tool developed reduces the burden of model complexity by dividing engine/transmission systems into hierarchical subsystem. Furthermore, it also provides user -friendly, reusable, and upgradable characteristics of the system. The simulation tool could be useful to the automotive engineers who frequently change models and develop new systems in the automotive powertrain and control area.

전력조류계산의 개선에 관한 연구 (An Improved Fast Decoupled Newton Raphson Load flow Study)

  • 박영문;백영식
    • 전기의세계
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    • 제26권2호
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    • pp.78-83
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    • 1977
  • The Newton-Raphson method has now gained widespread popularity in Load-flow calculationes. In this paper programming is developed with aims to improve the convergence characteristics, speed and memory requirements in the above method. The method of Load-flow calculations is performed by employing the MW-O/MVAR-V decoupling principle. To reduce the memory requirements and improve the speed of calculation the programming of the Optimally Ordered Triangular Factorization method is developed. Besides this, other measures are taken to reduce memory requirements and computing time and to improve reliability. KECO'S 48 Bus system was tested and the method suggested in this paper was proved to be faster than any other methods.

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캠퍼스 마스터플랜의 구성(構成)과 계획방법(計劃方法)에 관한 연구(硏究) (A Study on the Campus Master Planning Methods)

  • 안경환
    • 교육시설
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    • 제15권5호
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    • pp.5-12
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    • 2008
  • The purpose of this study is to suggest a design guideline for the domestic campus master plan. The main contents of this study are as follows ; 1) Study for the characteristics and components of the comprehensive campus master plan. 2) Case study on the domestic campus plan 3) Establishment of methods for campus master plan focused on the space programming, land use planning, circulation planning, and building layout planning.

SONOS 비휘발성 기억소자의 향상된 프로그램/소거 반복 특성 (The Improved Electrical Endurance(Program/Erase Cycles) Characteristics of SONOS Nonvolatile Memory Device)

  • 김병철;서광열
    • 한국전기전자재료학회논문지
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    • 제16권1호
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    • pp.5-10
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    • 2003
  • In this study, a new programming method to minimize the generation of Si-SiO$_2$interface traps of SONOS nonvolatile memory device as a function of number of porgram/erase cycles was proposed. In the proposed programming method, power supply voltage is applied to the gate. forward biased program voltage is applied to the source and the drain, while the substrate is left open, so that the program is achieved by Modified Fowler-Nordheim(MFN) tunneling of electron through the tunnel oxide over source and drain region. For the channel erase, erase voltage is applied to the gate, power supply voltage is applied to the substrate, and the source and dram are left open. Also, the asymmetric mode in which the program voltage is higher than the erase voltage, is more efficient than symmetric mode in order to minimize the degradation characteristics or SONOS devices because electrical stress applied to the Si-SiO$_2$interface is reduced due to short program time.

혼합정수 선형계획법을 이용한 계통의 전압제어 및 안전도 평가 (Voltage Control and Security Assessment of Power System Using Mixed Integer Linear Programming)

  • 김두현;김상철
    • 한국안전학회지
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    • 제14권2호
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    • pp.70-76
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    • 1999
  • In this paper, a mixed-integer programming approach is presented for adjusting the voltage profiles in a power system. The advent of large-scaled system makes the reactive power and voltage problem-an attempt to achieve an overall improvement of system security, service quality and economy-more complex and seriously, Although the problem is originally a nonlinear optimization problem, it can be formulated as a mixed integer linear programming(MILP) problem without deteriorating of solution accuracy to a certain extent. The MILP code is developed by the branch and bound process search for the optimal solution. The variable for modeling transformer tap positions is handled as discrete one, and other variables continuous ones. Numerical data resulting from case study using a modified IEEE 30 bus system with outaged line show that the MILP can produce more reductions of magnitude in the operating cost. The convergence characteristics of the results are also presented and discussed.

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다단계 생산공정에서의 검사지점 할당 문제에 관한 연구 (The Allocation of Inspection Stations in Multi-Stage Production Systems with 0-1 Integer Programming)

  • 이성기;윤덕균
    • 품질경영학회지
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    • 제24권1호
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    • pp.20-31
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    • 1996
  • A pure zero-one integer program is formulated for determining where to assign the inspection stations in a multi-stage production system. The objective fuction is formulated to minimize the overall inspection costs. One of the major characteristics of this system is that an assigned inspection station is to inspect only the items produced in previous manufacturing stages. Each inspection station can be assigned to any possible inspection stage between two manufacturing stages. Error-free and screening inspection policy is assumed in this system and the defective items found in any inspection station will be reworked at once. The integer programming model presented in this paper has the advantages in the ease of modeling and modifiing as compared with the existing dymanamic programming methods. The solutions of the model can be easily obtained by the commercially available softwares like LINDO and GAMS.

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일반화된 선형/목표계획법의 마이크로컴퓨터용 소프트웨어 개발 (Software Development of Generalized Linear/Goal Programming for Microcomputer)

  • 차동완;고재문;이원택
    • 한국경영과학회지
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    • 제11권1호
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    • pp.51-58
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    • 1986
  • The propose of this study is to presnet a generalized linear/goal programming software, which has been developed to run on mickrocomputers with at least 512 K bytes of memory. The main characteristics of our algorithm for solving LP/GP problems are outlined as follows ; First, it uses the revised simplex algorithm, which is the most efficient computational procedure for computers. Second, it employs the sparse matrix technique to overcome the limited memory of microcomputers. Last, it uses the modified product form of invers (MPFI) to reduce round-off errors. The test runs with our code written in FORTRAN show that it can be used as an effective tool for solving linear/goal programming problems of considerable size.

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구조적 프로그램을 위한 소프트웨어 Tool의 개발 (Software Tool Development for structured Programming)

  • 이동춘;김성종;김창복;신인철;이상범
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(II)
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    • pp.1140-1143
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    • 1987
  • The purpose of this study is to develop a systematic tool which can reduce the abstractness of the structured programming disciplines by a system. The system is an interactive software which forces the user to think and write software in a hierarchical stepwise refinement fashion for an implementation of the software design. The program produced by the system has a program control structure and a logic flow which are very easy to recognize. The modification of a program is, therefore, easier to attain by altering the specifications of the modules involved. It is possible to reduce the programming errors because of those characteristics.

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프로그래밍 언어 메타이론의 정형화 및 변수 묶기 (Formalization of the Meta-Theory of a Programming Language with Binders)

  • 이계식
    • 한국정보과학회논문지:소프트웨어및응용
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    • 제35권12호
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    • pp.800-807
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    • 2008
  • 프로그래밍 언어의 구문 구조(syntax)와 메타이론을 정형화(formalization)하고 관련된 명세(specification)의 증명을 자동화(automatization)하는 과정에서 일어날 수 있는 모든 종류의 변수 묶기(variable binding)를 정형적(formal)으로 구현, 해결하는 방식을 개략적으로 소개한다. 또한 함수언어(functional language)의 기본으로 사용되는 Lambda calculus와 연계해서 POPLmark Challenge와 관련된 시도들의 공통점, 차이점 및 각각의 특성을 증명보조 툴인 Coq에서 구현된 간단한 예제들을 통해 보여준다.

객체지향 기술의 확산에 영향을 주는 요인에 관한 경험적 연구 (An Empirical Study on the Factors Affecting Diffusion of Objeccl-Oriented Technology)

  • 이민화
    • 한국정보시스템학회지:정보시스템연구
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    • 제10권1호
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    • pp.97-126
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    • 2001
  • Object-orientation has been proposed as a promising software process innovation to improve software productivity and quality. It has not been understood clearly, however, what factors influences the diffusion of object-oriented technology in organizations. A research model was formulated and hypotheses were generated based on the literature of information technology implementation and software process innovation. To test the research hypotheses, a questionnaire survey was conducted. The results based on 121 responses from Korean companies revealed that project characteristics, use of external experts, and number of development projects are significantly related to the diffusion of object-oriented analysis and design and object-oriented programming. Innovation champion is positively related to the diffusion of object-oriented analysis and design, whereas it is not related to the diffusion of object-oriented programming language. Only project complexity was significantly related to the diffusion of visual programming language. On the other hand, organizational size was not significantly related to any object-oriented technology in this study.

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