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排序方式: 共有152条查询结果,搜索用时 15 毫秒
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研究了易变质产品的可替代库存模型.在有限计划期内,供应商面临两种不同产品的需求,当一种产品发生短缺时,另一种产品可以以一定的替代率代替短缺产品.通过分析系统的总成本函数的性质,提出了最优订购策略.最后通过算例验证了算法的最优性. 相似文献
33.
A Fully Polynomial Approximation Scheme for Minimizing Makespan of Deteriorating Jobs 总被引:2,自引:0,他引:2
A fully polynomial approximation scheme for the problem of scheduling n deteriorating jobs on a single machine to minimize makespan is presented. Each algorithm of the scheme runs in O(n
5
L
43) time, where L is the number of bits in the binary encoding of the largest numerical parameter in the input, and is required relative error. The idea behind the scheme is rather general and it can be used to develop fully polynomial approximation schemes for other combinatorial optimization problems. Main feature of the scheme is that it does not require any prior knowledge of lower and/or upper bounds on the value of optimal solutions. 相似文献
34.
This paper presents an integrated fuzzy-optimization customer grouping based logistics distribution methodology for quickly responding to a variety of customer demands. The proposed methodology involves three main mechanisms: (1) pre-route customer classification using fuzzy clustering techniques, (2) determination of customer group-based delivery service priority and (3) en-route goods delivery using multi-objective optimization programming methods. In the process of pre-route customer classification, the proposed method groups customers’ orders primarily based on the multiple attributes of customer demands, rather than by static geographic attributes, which are mainly considered in classical vehicle routing algorithms. Numerical studies including a real-world application are conducted to illustrate the applicability of the proposed method and its potential advantages over existing operational strategies. Using the proposed method, it is shown that the overall performance of a logistics distribution system can be improved by more than 20%, according to the numerical results from the case studied. 相似文献
35.
Optimal Advertising and Pricing in a New-Product Adoption Model 总被引:3,自引:0,他引:3
A model of new-product adoption is proposed that incorporates price and advertising effects. An optimal control problem that
uses the model as its dynamics is solved explicitly to obtain the optimal price and advertising effort over time. The model
has a great potential to be used in obtaining solutions and insights in a variety of differential game settings.
The authors thank Anshuman Chutani for help with the figures. 相似文献
36.
A family of core extensions for cooperative TU-games is introduced. These solution concepts are non-empty when applied to
non-balanced games yet coincide with the core whenever the core is non-empty. The extensions suggest how an exogenous regulator
can sustain a stable and efficient outcome, financing a subsidy via individual taxes. Economic and geometric properties of
the solution concepts are studied. When taxes are proportional, the proportional prenucleolus is proposed as a single-valued
selection device. An application of these concepts to the decentralization of a public goods economy is discussed.
We wish to thank the editor, a referee, an anonymous reviewer, Beth Allen, Marc Dudey, Yakar Kannai, Herve Moulin, Marcel
Richter, Luis Sánchez-Mier, and the participants in the Microeconomic Theory Workshop at Rice University for their helpful
comments. 相似文献
37.
38.
本通过对我国居民五十年来耐用品消费结构变化的分析、我国未来汽车市场需求量的计算,以及我国汽车消费贷款的实例分析,从而得出我国未来汽车市场潜力很大,汽车消费贷款前景十分广阔,将为我国国民经济的发展,特别是汽车工业的发展起到理想的催化作用。 相似文献
39.
40.
利用传递函数——噪声模型表达经济变量间的动态影响机制 总被引:3,自引:0,他引:3
传递函数———噪声模型是一类多变量时间序列模型,它在表达系统动态影响机制方面有着独到的优势。本文将这种模型的建模方法应用于经济系统,建立了一个表达产值和出口间动态关系的传递函数———噪声模型。近几个月的实际数据表明模型的拟合是理想的。 相似文献