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A nonstationary point process can be efficiently simulated by exploiting a representation as the composition of a rate-one process and the cumulative arrival rate function, provided that an efficient algorithm is available for generating the rate-one process, as is the case for stationary renewal processes, Markov modulated Poisson processes and many other processes. Overall efficiency can be achieved by constructing a table of the inverse cumulative arrival rate function when it is not explicitly available. [ABSTRACT FROM AUTHOR]

Purpose -- The purpose of this paper is to provide strong theoretical and technical support for the dynamic evolution of service system in "Cluster Supply Chain" (CSC), which can deal with two kinds of context changes: the internal service component changes and the external customer requirement changes. Design/methodology/approach -- A "feedback-based" evolution mechanism of service system for CSC is proposed in this study. By means of the feedback update of enterprise service's Quality of Service (QoS) attribute and the adjustment of the assumed QoS evaluation model, the evolution of service system can be achieved to suit the dynamic market demands. Findings -- Results of the study suggest: by means of the "feed-back" evolution mechanism of service system, the enterprises in CSC can handle the context changes effectively to maintain the optimized operation status. Practical implications -- The implementation of evolution mechanism in service system can keep the effectiveness of enterprise service composition to face the frequent service component changes and the unpredictable market turbulence. Originality/value -- This paper proposes a method to realize the autonomous evolution of service system in CSC, which can support the flexibility and adaptability of enterprise service composition in the changing environment. [ABSTRACT FROM AUTHOR]

The general information and the task service system design of NHTX-1 SAT were introduced. NHTX-1 SAT is a low power consumption and high function integration satellite, and the data service system is the only central data processing system that integrates satellite attitude control and task management capabilities. Based on these features, the hardware and softwares were designed for the failure prevention measures and troubleshooting programs, such as the power safety insurance and software fault tolerance to improve system reliability and safety. [ABSTRACT FROM AUTHOR]

Purpose – The purpose of this paper is to give some theoretical suggestions and practical approaches in support of the implementation of "cluster supply chain" (CSC), which is a new management paradigm and enhances the competitiveness of small and medium enterprises (SMEs) through integrating the advantages of supply chain and industrial cluster. Design/methodology/approach – A case study of cluster supply chain is carried out applied to JingCheng Mechanical and Electrical Holding Co. Ltd (JCH), which explains the advantages and challenges of implementing the new business pattern. Data presented and analyzed include pre-CSC and CSC performance of participants. Findings – The paper clarifies the following questions: When do small firms use cluster supply chain to run a business? How do small firms use cluster supply chain? What effects does the application of CSC strategy have on SMEs' competitive performance? Practical implications – The application of CSC strategy can help SMEs to face the global challenges through all kinds of collaborations. Meanwhile, core enterprises can also extend their business at a lower cost by means of this business pattern. Originality/value – This paper bridges the gap between academic theoretical studies and practical realization through the case study of JCH, which can encourage and lead to managerial ideas and insights to service system realization and avoid deficient or erroneous grounds in the planning, implementation and evaluation of cluster supply chain. [ABSTRACT FROM AUTHOR]