Improved sheep flock heredity algorithm and artificial bee colony algorithm for scheduling m-machine flow shops lot streaming with equal size sub-lot problems

The objective of this paper is to develop intelligent search heuristics to solve n-jobs, m-machines lot streaming problem in a flow shop with equal size sub-lots where the objective is to minimise makespan and total flow time independently. Improved sheep flock heredity algorithm (ISFHA) and artificial bee colony (ABC) algorithms are applied to the problem above mentioned. The performance of these algorithms is evaluated against the algorithms reported in the literature. The computational analysis shows the better performance of ISFHA and ABC algorithms.     

A comparison of alternative delivery structures in a dual sourcing environment

This paper studies the flow of material between two vendors and a buyer and develops alternative delivery structures with the intention of minimising total system costs. The proposed delivery structures employ alternative design features and give varying degrees of flexibility to the system as to the emergence of inventory and the allocation of inventory among both stages of the supply chain. The delivery structures are compared in a numerical study and it is shown that an increasing degree of flexibility in the delivery structure always leads to lower total system costs. Further, contextual factors that influence relative performance advantages of the structures are identified.     

Hybrid genetic algorithm for group technology economic lot scheduling problem

The concept of group technology has been successfully applied to many production systems, including flexible manufacturing systems. In this paper we apply group technology principles to the economic lot scheduling problem, which has been studied for over 40 years. We develop a heuristic algorithm and a hybrid genetic algorithm for the group technology economic lot scheduling problem. Numerical experiments show that the developed algorithms outperform the existing heuristics.     

变速算法在舞台吊杆控制中的应用

传统舞台吊杆控制系统多采用匀速控制,存在吊杆定位误差大,零速停靠不易实现等缺点.该文介绍了舞台吊杆变速控制方案,重点介绍了变速算法的应用与实现,实验结果表明,该算法可以使吊杆实现零速制动,减小定位误差.     

对城市住区停车问题的思考

文章以住区停车为研究对象，阐述住区汽车拥有率的动态变化，分析位区停车方式，结合实际提出停车问题设计对策，探索适应住区停车发展的新思路。     

济钢2号高炉大料批分装一车一布生产实践

介绍了从１９９７年７月起济钢２号高炉进行的大料批分装的实践，开发出集分装、布料器一车一布、矿焦定差料线为一体的超级大料批技术，并取得显著成效     

居住小区静态交通的几个问题

通过对居住小区内静态交通发展趋势的分析与研究，提出了居住区内部停车的基本原则，并对居住区内主要停车方式及其应用进行了探讨．     

战术导弹飞行试验的检验方法比较

检验方法对于战术导弹飞行试验与鉴定至关重要,介绍了定型与批检试验的检验方法及其发展变化,并对它们的特点及使用做了比较.     

辊道存放型机械式停车设备结构形式

辊道存放型机械式停车设备的仓储式钢架可并排多车位存放轿车和微型客车等无需存车托板。文中介绍其结构形式、工作原理、存取方法以及产品实例。     

一种简化辅助泊车模型的建立与仿真研究

通过简化运动与转向过程中的车辆以及停车位,提取出车辆以及停车位的主要参数,建立了一种基于运动学及转向模型的两阶段简化辅助泊车模型。应用该模型在MATLAB中进行模拟泊车分析,模拟计算结果与实车泊车入位过程一致性较好,该模型可推广应用于实车泊车系统没计。