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This paper proposes a class of strict and high efficient Petri net algebras by combining the algebraic system theory with net transformation operations for model transformation of discrete event systems. The algebras include the fundamental operation systems of P/T net nodes and blocks as well as the advanced node-interfaced and block-interfaced net operation systems. Meanwhile, the algebraic properties...
In C2C e-commerce environment it is possible and indeed quite common to deal with unknown sellers, whose reliability are unknown. Reputation system is a popular technique currently used for providing a global quality score of sellers to consumers. However, such global information is far enough for clients to choose the most qualified products. In the real word, we always ask our trusted friends for...
Using S-Graph(SG) to model the complex system,the complexity of system results in the complexity of SG, but it dose not change. So, we look for a new method to find its main places and edges. Based on betweenness centrality of place that are used to grasp the main structure of the complex SG (the main places), the structural differential point of SG based on betweenness centrality (SDPSG-BC) is developed,...
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