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Articles by Ma Jian-feng
Total Records ( 2 ) for Ma Jian-feng
  Ma Wei-gang , Cao Yuan , Wei Wei , Lu Wei , Ma Jian-feng and Hei Xin-hong
  In view of utilizing Petri net to perform analysis of UML model, this paper proposes a transformation methodology from UML statechart to Petri net in terms of the semantics. Firstly, it gives the formal definition of the UML statechart, uses state sets, transition sets, event sets, guard sets, object sets and refinement functions of the state to describe the features of the UML statechart and designs transfer sets of state concurrency, transfer sets of collision and transfer priorities. Based on the strict formal semantics of the Petri net, the study studies the equivalency between them and proposes a transformation algorithm from UML statechart to Petri net which lays the foundation of automated transformation. Finally, in order to validate the proposed methodology, a novel decentralized railway interlocking system which ensures train safety in stations is modeled and analyzed.
  Zhang Liu-Mei , Ma Jian-Feng , Wang Yi-Chuan and Lu Di
  In this study, an attribute clustering based collaborative filtering algorithm is depicted for virtual machine migration towards green Cloud computing. The algorithm utilizes similarity characteristics of virtual machine task related attributes, especially CPU related attributes, to filter redundant data by feature selection. Then by referencing K-Means clustering to effectively solve the rating scale problems existing in the traditional collaborative filtering recommendation algorithm. Experiments use virtual machine task related information for clustering the data. By integration of a scaled rating scheme on task related properties and the collaborative filtering philosophy to provide migration recommendation for system administrators.
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