the problem of staff scheduling at a truck hub for loading and stripping of the trucks is an important and difficult problem to optimize the labor efficiency and cost. the trucks enter the hub at different hours a day, in different known time schedules and operating hours. in this paper, we propose a goal programming to maximize the labor efficiency via minimizing the allocation cost. the propo...

to use services transparently in a distributed environment, the utility grids develop a cyber-infrastructure. the parameters of the quality of service such as the allocation-cost and makespan have to be dealt with in order to schedule workflow application tasks in the utility grids. optimization of both target parameters above is a challenge in a distributed environment and may conflict one ano...

Abstract Raising the maximum valve lift in two-stroke drive mode is key to increasing power output of variable-stroke engine, so limit design train device critical. The multi-objective genetic optimization algorithm NSGA-2 was coupled with single-freedom dynamics model device. A rapid program for constructed Matlab. Two methods explored mode. first optimize rocker structure, and second cam posi...