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The paper describes the quality analysis of web services implemented in virtualised environment. It takes into account the reliability and performance aspects of software and hardware elements of the web service. The presented state-transitional model considers the reconfiguration process to maintain the continuity of business services. The reconfiguration is based in on the redeployment of virtual...
In this paper we propose an algorithm for computing fuzzy production availability of repairable flow network with independently working edges, fuzzy failure rate and time to repair. Production availability is the ratio of the maximum expected output flow Q̄r from the repairable flow network in the presence of failures, during a specified time interval, to the maximum output flow Q0 that could be obtained...
Fuzzy mathematical analysis and integral characteristics and composite trapezoidal formulae were used to study the solution of the Fuzzy volterra integral equations of the second kind. First, -cut method of Fuzzy set was used to transform the fuzzy integral equations into the interval number equations, then the calculation rules of the interval numbers and the integral characteristics were used to...
Grid scheduling is essential to Quality of Service provisioning as well as to efficient management of grid resources. Grid scheduling usually considers the state of the grid resources as well application demands. However, such demands are generally unknown for highly demanding applications, since these often generate data which will be transferred during their execution. Without appropriate assessment...
This paper presents an approach to select the proper location of wind farm in power system. Two key factors for constructing wind farm are considered in this study. They are wind availability and wind speed. Because of the “undispatchable” nature of wind and the difficulty in forecasting, the wind availability and wind speed are random and uncertainty. Thus, the deterministic method is not appropriate...
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