• 제목/요약/키워드: Abstract Systems

검색결과 401건 처리시간 0.027초

위치 지정 프로세스 모델의 추상기계 (An Abstract Machine for a Located Process Model)

  • 신승철;최진영;변석우
    • 한국정보과학회논문지:소프트웨어및응용
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    • 제26권2호
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    • pp.325-325
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    • 1999
  • This paper presents a locally deterministic abstract machine for a new process model LocPi which is based on a subset of asynchronous polyadic π-calculus and enriched with locations and process mobility. Our calculus has a primitive for migrating and spawning a process to a location(remote site), but does not explicitly represent the place which a process are running at. Running processes may have names attached with their locations and the communication reductions can occur only on located names. So we present how to assign locations to unlocated names. Without a global channel environment, these located names enable us to locate the place which input actions occur at and output messages should be sent to.

뇌세포형 컴퓨터 시스템 (Neural computer systems)

  • 김성수;우광방
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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    • pp.552-555
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    • 1988
  • In this paper, the authors introduce the concepts of neural computer systems which have been studied over 25 years in other countries. And also we illustrate the models of neural networks suggested by researchers. Our fundamental hypothesis is that these models are applicable to the construction of artificial neural systems including neural computers. Therefore we assume that neural computer systems are abstract computer systems based on the computational properties of human brains and particularly well suited for problems in vision and language understanding.

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A SIMPLE CHARACTERIZATION OF POSITIVITY PRESERVING SEMI-LINEAR PARABOLIC SYSTEMS

  • Haraux, Alain
    • 대한수학회지
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    • 제54권6호
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    • pp.1817-1828
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    • 2017
  • We give a simple and direct proof of the characterization of positivity preserving semi-flows for ordinary differential systems. The same method provides an abstract result on a class of evolution systems containing reaction-diffusion systems in a bounded domain of ${\mathbb{R}}^n$ with either Neumann or Dirichlet homogeneous boundary conditions. The conditions are exactly the same with or without diffusion. A similar approach gives the optimal result for invariant rectangles in the case of Neumann conditions.