By a News Reporter-Staff News Editor at Journal of Mathematics -- Investigators publish new report on Algorithms. According to news reporting originating from Shanghai, People's Republic of China, by VerticalNews correspondents, research stated, "Semiconductor Wafer Fabrication System (SWFS) is one of the most complicate discrete processing systems in the world. As the wafer size grows from 200 to 300 mm and then to 450 mm in recent years, the interbay automated material handling system (AMHS) has been widely adopted."
Our news editors obtained a quote from the research from Shanghai Jiao-Tong University, "How to improve the overall efficiency of interbay material handling has therefore become a critical and urgent problem to be solved. However, the large-scale, dynamic and stochastic production environment significantly substantiates the complexity of the scheduling problem. Aiming to meet the demands of adaptive adjusting, efficient scheduling and multiple-objective optimization, a dynamic dispatching method based on modified Hungarian algorithm is proposed. The system parameters, including cassette due date, cassette waiting time, and system load are simultaneously considered, and furthermore the multi-parameters' weight coefficients are adjusted dynamically by using the fuzzy-logic-based control. Discrete event simulation models are constructed with the eM-Plant software to evaluate the proposed approach. Experimental results show that the proposed dynamic dispatching method improves the system efficiency in terms of mean delivery time, mean waiting time and so on."
According to the news editors, the research concluded: "Meanwhile, the proposed dispatching method has a better comprehensive performance such as the robustness compared to conventional vehicle dispatching approaches."
For more information on this research see: Dynamic dispatching for interbay material handling by using modified Hungarian algorithm and fuzzy-logic-based control. International Journal of Advanced Manufacturing Technology, 2013;67(1-4):295-309. International Journal of Advanced Manufacturing Technology can be contacted at: Springer London Ltd, 236 Grays Inn Rd, 6TH Floor, London WC1X 8HL, England. (Springer - www.springer.com; International Journal of Advanced Manufacturing Technology - www.springerlink.com/content/0268-3768/)
The news editors report that additional information may be obtained by contacting W. Qin, Shanghai Jiao Tong University, CIM Res Inst, Shanghai 200030, People's Republic of China. Additional authors for this research include J. Zhang and Y.B. Sun.
Keywords for this news article include: Asia, Shanghai, Algorithms, Fuzzy Logic, People's Republic of China
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