• Title, Summary, Keyword: LB-circuits

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Initial requirements to the optimal performance of systems modeled by timed place Petri nets using the synchronic time ratio (Synchronic time ratio를 이용 시간 페트리 네트로 모델링된 시스템의 최적 성능에 필요한 초기 조건 결정)

  • Go, In-Seon;Choi, Juang-Hwan
    • Journal of Institute of Control, Robotics and Systems
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    • v.3 no.1
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    • pp.101-108
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    • 1997
  • The initial token value required to the optimal performance of discrete event systems can be decided by Sum of Delay Time and Synchronic Time ratio, which are new synchronic variables in Timed Place Petri Nets. For the system consisting of two Live-and-Bounded circuits(LB-circuits) fused in common Transition-Transition-Path or common Place-Place-Path, we prove that the Synchronic Time Ratio is the initial token ratio between two LB-circuits to optimally perform system functions. These results are generalized and formulated as a theorem. The initial tokens of a specific place can imply shared resources. Using the theorem, we can decide the minimum number of the shared resources to obtain the optimal performance, and minimize the idling time of resources. As an example, an automated assembly system is modeled by Timed Place Petri Net, and the initial tokens to achieve the optimal system performance are identified. All the values are verified by simulation.

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Molecular grafting to improve adhesion of spray-deposited circuits on polymeric surface for flexible electronics

  • Chen, Dexin;Kang, Zhixin;Bessho, Takeshi
    • Journal of Industrial and Engineering Chemistry
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    • v.52
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    • pp.73-81
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    • 2017
  • An efficient molecular grafting approach is presented to improve interfacial adhesion of logic circuits by virtue of the valuable molecules chemically linked to polymer surfaces. With spray-assisted layer-by-layer deposition, pure metallic Ag coatings with a thickness of 130 gm adhere well to the PET plastics and the homogeneity of the Ag coatings has been studied. In particular, the peel broken site is estimated inside polyester resin beneath the interface. The fabricated flexible circuits maintain high conductivity under various twisting conditions and bending tests, indicating the possibility of producing robust printed circuits onto flexible substrates.

Performance evaluations of discrete event system using Petri Nets (페트리 네트를 이용한 이산 사건 시스템의 성능 분석)

  • 최정환;고인선
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1241-1244
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    • 1996
  • This paper present a performance evaluation method for Timed Place Petri Nets modeled by Live-and-Bounded Circuits (LB-circuits) through a bottom-up approach. The method can handle the case for the nets having common resources(CR). The target system is divided into the sub-systems by disconnecting the common Transition-Transition-Path(TTP) or Place-Place-Path (PPP) between sub-systems. The common PPP pattern is classified into Parallel Common Resource (PCR) and Sequential Common Resource (SCR) in detail for handling common resources. We evaluate the performance of each divided sub-system, and calculate the sub-systems affect on the performance of the whole system. The facts are generalized as a theorem. The developed theorem are applied into the performance evaluation of an automated assembly system shown in an example. All the results are verified by simulation.

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Fabrication of Organic Nanowire Electronics by Direct Printing Method

  • Park, Gyeong-Seon;Seong, Myeong-Mo
    • Proceedings of the Korean Vacuum Society Conference
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    • pp.563-563
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    • 2012
  • We report a one-step fabrication of single-crystal organic nanowire arrays on substrates using a new direct printing method (liquid-bridge-mediated nanotransfer moulding, LB-nTM), which can simultaneously enable the synthesis, alignment and patterning of the nanowires using molecular ink solutions. Two- or three-dimensional complex structures of various single-crystal organic nanowires were directly fabricated over a large area with a successive process. The position of the nanowires can be aligned easily on complex structures because the mold is movable on substrates before drying the polar liquid layer, which acts as an adhesive lubricant. This efficient manufacturing method can produce a wide range of optoelectronic devices and integrated circuits with single-crystal organic nanowires.

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