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    政大機構典藏 > 商學院 > 資訊管理學系 > 期刊論文 >  Item 140.119/113057


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    題名: Controllability of weakly dependent siphons under elementary-siphon control
    作者: 趙玉
    Wu, Wen Hui
    Chao, Daniel Yuh
    貢獻者: 資管系
    關鍵詞: Benchmarking;Computer system recovery;Integer programming;Petri nets;Deadlock prevention;Dependent siphon;Elementary siphon;Linear inequalities;Linear integer programming;Redundancy elimination;Resource requirements;Sequential process;Siphons
    日期: 2016-08
    上傳時間: 2017-09-15 16:10:17 (UTC+8)
    摘要: Monitors are added to problematic siphons to avoid deadlocks. Li and Zhou (2004, 2006a,b, 2008a,b,c) add monitors to elementary siphons only while controlling the rest-dependent siphons to save on costs. After failing a marking linear inequality (MLI) test, Li and Zhou perform a linear integer programming (LIP) test (NP-hard). We proposed a new MLI test earlier to avoid the LIP and extended it to systems of simple sequential processes with general resource requirements (S3PGR2) for strongly dependent siphons (SDSs). The control policy for weakly dependent siphons (WDSs) is rather conservative due to some negative terms in the MLI. This paper shows that WDS and SDS have the same controllability (i.e. MLI). As a result, the control for WDS need no longer be that conservative. We also develop an optimization (by redundancy elimination) of the computation required for the LIP test to ensure deadlock prevention of systems of simple sequential processes with resources (S3PR). A favourable result for this policy is that any n-dependent (n > 2) WDS (similar to SDS) needs no monitor and hence the complexity for synthesizing a controller becomes polynomial. Application to a slight variant of a well-known benchmark is illustrated.
    關聯: Transactions of the Institute of Measurement and Control, 38(8), 941-955
    資料類型: article
    DOI 連結: http://dx.doi.org/10.1177/0142331214568606
    DOI: 10.1177/0142331214568606
    顯示於類別:[資訊管理學系] 期刊論文

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