The problem of simultaneous scheduling of machines and vehicles in flexible manufacturing system (FMS) was addressed.A spreadsheet based genetic algorithm (GA) approach was presented to solve the problem.A domain inde...The problem of simultaneous scheduling of machines and vehicles in flexible manufacturing system (FMS) was addressed.A spreadsheet based genetic algorithm (GA) approach was presented to solve the problem.A domain independent general purpose GA was used,which was an add-in to the spreadsheet software.An adaptation of the propritary GA software was demonstrated to the problem of minimizing the total completion time or makespan for simultaneous scheduling of machines and vehicles in flexible manufacturing systems.Computational results are presented for a benchmark with 82 test problems,which have been constructed by other researchers.The achieved results are comparable to the previous approaches.The proposed approach can be also applied to other problems or objective functions without changing the GA routine or the spreadsheet model.展开更多
The low frequency electromagnetic wave instability in an unmagetized inhomogeneous dusty plasma has been pointed out.It has been noticed that there exists a stable mode if the propagation of the wave vector along the ...The low frequency electromagnetic wave instability in an unmagetized inhomogeneous dusty plasma has been pointed out.It has been noticed that there exists a stable mode if the propagation of the wave vector along the density gradient is ignored.However,the mode becomes unstable by including the propagation of the wave in the opposite direction of the density gradient.展开更多
文摘The problem of simultaneous scheduling of machines and vehicles in flexible manufacturing system (FMS) was addressed.A spreadsheet based genetic algorithm (GA) approach was presented to solve the problem.A domain independent general purpose GA was used,which was an add-in to the spreadsheet software.An adaptation of the propritary GA software was demonstrated to the problem of minimizing the total completion time or makespan for simultaneous scheduling of machines and vehicles in flexible manufacturing systems.Computational results are presented for a benchmark with 82 test problems,which have been constructed by other researchers.The achieved results are comparable to the previous approaches.The proposed approach can be also applied to other problems or objective functions without changing the GA routine or the spreadsheet model.
文摘The low frequency electromagnetic wave instability in an unmagetized inhomogeneous dusty plasma has been pointed out.It has been noticed that there exists a stable mode if the propagation of the wave vector along the density gradient is ignored.However,the mode becomes unstable by including the propagation of the wave in the opposite direction of the density gradient.
