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41.
Babak Javadi M. Saidi-Mehrabad Alireza Haji Iraj Mahdavi F. Jolai N. Mahdavi-Amiri 《Journal of The Franklin Institute》2008,345(5):452-467
This study develops a fuzzy multi-objective linear programming (FMOLP) model for solving the multi-objective no-wait flow shop scheduling problem in a fuzzy environment. The proposed model attempts to simultaneously minimize the weighted mean completion time and the weighted mean earliness. A numerical example demonstrates the feasibility of applying the proposed model to no-wait flow shop scheduling problem. The proposed model yields a compromised solution and the decision maker's overall levels of satisfaction. 相似文献
42.
Mehrnoush Davanipour Alireza Khayatian Maryam Dehghani 《Journal of The Franklin Institute》2017,354(14):5949-5963
In this paper, a solution for improvement of transient performance in adaptive control of nonlinear systems is proposed. An optimal adaptive controller based on a reset mechanism and a prescribed performance bound is devised. The suggested controller has the structure of adaptive backstepping controller in which the estimated parameters are reset to an optimal value. The designed controller ensures both the transient bound and the asymptotical convergence of the states. It is shown that the tracking error satisfies the prescribed performance bound all the time, besides the speed of the convergence rate is increased by resetting the estimated parameters. The results have been proved through both the analytical and simulation studies. The proposed method is applied to an Augmented Quarter Car Model as a case study. Simulation results verify the established theoretical consequences that the prescribed performance bound based optimal adaptive reset controller can enhance the transient performance of the adaptive controller. 相似文献
43.
Based on Bourdieu’s conceptualization of social capital (the social stratification perspective), this study examines the impact of social capital on the educational outcomes of young people in Sweden, with a focus on the extra-familial aspect of social capital – that is, social capital generated by parental networks and active membership in various social organizations and friendship networks. The results indicate that the class background of respondents is the main predictor of access to all three forms of extra-familial social capital. However, after controlling for class background, the children of racialized immigrant groups are more likely to have access to more types of social capital than others. All three aspects of extra-familial social capital positively influence the educational performance of pupils. 相似文献