Sequencing mixed-model flexible assembly lines with variable launching intervals

To solve the sequencing problem in mixed-model flexible assembly lines (MMFALs) with variable launching intervals, a mathematical model aiming to minimize the cost of utility and idle times is developed. To obtain high-quality sequences, an advanced scatter search (ASS) algorithm is proposed. A heuristic approach, i.e. launching intervals between products algorithm (LIBPA), is incorporated into the ASS algorithm to solve the launching interval problem for each sequence. Numerical experiments with different scales are conducted to compare the performance of ASS with genetic algorithm (GA). In addition, we compare the cost of variable launching intervals approach with fixed launching intervals approach. The results indicate that the ASS is efficient and effective, and considering variable launching intervals in mixed-model assembly lines (MMALs) sequencing problem can improve the performance of the line.     

基于RFID技术的车辆调度中心系统设计

整车生产由于其自身的特殊性对车辆的自动跟踪一起调度有着严格的要求，随着市场需求的急剧传统的人工盘点以及条码技术已经不能满足整车生产的精确要求．RFID技术的发展很好的满足了整车制造的要求，本文探讨了RFID车辆调度中心设计中的应用．