Modern satellite propulsion systems are generally designed to fulfill multiphase-missions.Traditional reliability modelling methods have problems of inadequate depict capacity considering complex systems such as satel...Modern satellite propulsion systems are generally designed to fulfill multiphase-missions.Traditional reliability modelling methods have problems of inadequate depict capacity considering complex systems such as satellite propulsion system.An extended object-oriented Petri net(EOOPN)method was proposed to facilitate the reliability modelling of satellite propulsion system in the paper.The proposed method was specified for modelling of phased mission system,and it could be implemented by generating combination of Petri net(PN)principles and object-oriented(OO)programming.The effectiveness of the proposed method was demonstrated through the reliability modelling of a satellite propulsion system with EOOPN.The major advantage of the proposed method is that the dimension of net model can be reduced significantly,and phased mission system at system,phase,or component levels can be respectively depicted.Furthermore,the state-space explosion problem is solved by the proposed EOOPN model efficiently.展开更多
为了提高ECA规则集可终止性分析的准确性,建立了一种可描述ECA规则集的扩展Petri网(EPN,extended Petri net)模型,在此基础上研究并提出了一种ECA规则集终止性判定算法。该算法充分利用EPN所包含ECA规则特性的丰富信息,综合分析了ECA规...为了提高ECA规则集可终止性分析的准确性,建立了一种可描述ECA规则集的扩展Petri网(EPN,extended Petri net)模型,在此基础上研究并提出了一种ECA规则集终止性判定算法。该算法充分利用EPN所包含ECA规则特性的丰富信息,综合分析了ECA规则特性对规则集可终止性的影响。理论分析和实验结果表明,所提出的算法具有更高的准确性和更低的时间复杂度。展开更多
A new method for designing sequential logic circuits is put forward in this paper. The method is that driv-ing condition for flip-flops is obtained by means of the transition firing condition of petri net and that des...A new method for designing sequential logic circuits is put forward in this paper. The method is that driv-ing condition for flip-flops is obtained by means of the transition firing condition of petri net and that designing asyn-chronous sequential circuits and synchronous sequential circuits can be unified.展开更多
文摘Modern satellite propulsion systems are generally designed to fulfill multiphase-missions.Traditional reliability modelling methods have problems of inadequate depict capacity considering complex systems such as satellite propulsion system.An extended object-oriented Petri net(EOOPN)method was proposed to facilitate the reliability modelling of satellite propulsion system in the paper.The proposed method was specified for modelling of phased mission system,and it could be implemented by generating combination of Petri net(PN)principles and object-oriented(OO)programming.The effectiveness of the proposed method was demonstrated through the reliability modelling of a satellite propulsion system with EOOPN.The major advantage of the proposed method is that the dimension of net model can be reduced significantly,and phased mission system at system,phase,or component levels can be respectively depicted.Furthermore,the state-space explosion problem is solved by the proposed EOOPN model efficiently.
文摘为了提高ECA规则集可终止性分析的准确性,建立了一种可描述ECA规则集的扩展Petri网(EPN,extended Petri net)模型,在此基础上研究并提出了一种ECA规则集终止性判定算法。该算法充分利用EPN所包含ECA规则特性的丰富信息,综合分析了ECA规则特性对规则集可终止性的影响。理论分析和实验结果表明,所提出的算法具有更高的准确性和更低的时间复杂度。
文摘A new method for designing sequential logic circuits is put forward in this paper. The method is that driv-ing condition for flip-flops is obtained by means of the transition firing condition of petri net and that designing asyn-chronous sequential circuits and synchronous sequential circuits can be unified.
