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华中生, Liang Liang, Desheng Wu * and Zhongsheng Hua
Int. J. Global Energy Issues, Vol. 22, Nos. 2/3/4, 2004,-0001,():
-1年11月30日
This paper chooses a Data Envelopment Analysis (DEA) model for different areas to identify the difference in solving the industrial pollution problem by comparing their levels of efficiency. Generally, the industrial pollution problem calls for within-area treatments, although these affect areas beyond their limits. Following this fact, a Maximal Efficiency Sum (MES) DEA Model is used to estimate the anti-industrial pollution efficiency of different cities in Anhui province of China.
industrial pollution, Data Envelopment Analysis (, DEA), , efficiency, programming, sustainable development, e, v, a, l, uation.,
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华中生, 徐晓燕, 石琴
中国科学技术大学学报,2000,30(1):99~107 ,-0001,():
-1年11月30日
以印刷电路板的制造过程为背景,总结了柔性制造/装配系统各种柔性的定义。基于柔性制造系统的柔性既取决于设备本身的性能,也取决于对驱动柔性制造/装配系统自动化运行的指令的认识,提出了柔性与大M制造各个过程的决策问题的关系框架。还提出一种新的部分柔性制造系统生产能力规划与生产线设计的模型,并分析探讨了决策问题的求解方法。
柔性制造系统, 柔性, 决策模型, 大M制造, 启发式算法
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【期刊论文】Heuristics to Scenario-Based Capacity Expansion Problem of PWB Assembly Systems∗
华中生, Zhongsheng Hua and Liang Liang
CASDMKM 2004, LNAI 3327, pp. 135-144, 2004.,-0001,():
-1年11月30日
A model of scenario-based line capacity expansion problem for PWB (Printed Wiring Board) assembly systems at the aggregate level is developed. The model synthesizes BOM (Bill Of Material) of product families and machine operation flexibility, thus it is an attempt of integrating strategic capacity planning, aggregate production planning and MPS (Master Production Scheduling), which is an important research topic of production management. Since the resulting model is a large-scale two-stage stochastic mixed integer programming problem, it can not be solved with standard code. An approximate solution procedure is developed, which first reduces the searching space of capacity expansion decision variables to rough addition sets by heuristics, then the rough addition sets are searched through adaptive genetic algorithms. Numerical experiments are presented to show the financial benefit of the model and the feasibility of our approach.
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【期刊论文】Aggregate line capacity design for PWB assembly systems
华中生, ZHONGSHENG HUA † and PRASHANT BANERJEE ‡, *
INT. J. PROD. RES., 2000, VOL. 38, NO.11, 2417-2441,-0001,():
-1年11月30日
In a multi-product, flexible manufacturing environment, line capacity of printed wiring board (PWB) assembly systems may need to be adjusted at the beginning of each aggregate planning period because of demand fluctuation over multiple periods. A model of production planning and equipment changeover scheduling at the aggregate level is developed. In the described model, three kinds of equipment changeover methods, i.e. adding machine, removing machine and transferring machine, are involved. Because the model is a large-scale integer programming problem, it cannot be solved directly. A solution approach is developed, which first solves a recursive linear programming problem to obtain a rough set of machines to be added and a rough set of machines to be removed for each machine line in each period, then applies a branch and bound heuristic to the rough sets to obtain near-optimal solutions to the equipment changeover scheduling problem. Computational studies show the financial benefit both on capital cost and equipment changeover costs.
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【期刊论文】Impact of demand uncertainty on supply chain cooperation of single-period products
华中生, Zhongsheng Hua *, Sijie Li, Liang Liang
Int. J. Production Economics ▌(▌▌▌▌) ▌▌▌-▌▌▌,-0001,():
-1年11月30日
Cooperation is an approach of improving competitive advantages of a supply chain. A two-echelon supply chain consisting of a manufacturer and a retailer for a single-period product is studied, and retail-market demand uncertainty is described by coefficient of variation. We develop a cooperation mechanism to address the cooperation and its implementation between the manufacturer and the retailer, two market situations are considered: (i) the wholesale price and the order quantity are decision variables, (ii) the wholesale and the retail prices as well as the order quantity are decision variables. In both market situations, our research shows that: (1) the cooperation mechanism can improve the overall channel profits and the supply chain members' allocated profits, (2) the described cooperation is conditional on retail-market demand uncertainty: it can be implemented if, and only if, the fluctuation of retail-market demand is relatively small and coefficient of variation of retail-market demand does not exceed an upper bound. Impacts of retailmarket demand uncertainty on wholesale price, order quantity and/or retail price have also been investigated through analytical and numerical analyses. Although our research is based on the assumption that the manufacturer dominates the supply chain in the non-cooperative situation, which is not the case for most retailer-driven supply chains, this research is still significant on providing guidelines for practitioners in current China mid-level car market that is similar to situations described in the paper.
Supply chain, Newsvendor problem, Demand uncertainty, Cooperation
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