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61.
本文对我国某地区显性债务规模与结构进行分析,结果表明,从规模上看,我国地方政府显性债务具有规模庞大,不断扩张,超出了地方财力规模,逾期债务比重较大等特点;从结构上看,我国地方政府显性债务具有来源复杂等特点。同时,通过对债务规模与某些因素的相关分析表明,我国地方政府显性债务规模与地方经济总量存在相关性。 相似文献
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智能化立体车库优化车辆存取策略研究 总被引:4,自引:0,他引:4
通过对智能化立体车库的研究,提出了三种可提高车库效率的优化车辆存取策略,即分区存取、交叉存取和自调整策略。 相似文献
64.
In recent papers, Moon and Choi (1998) and Hariga and Ben-Daya (1999)considered a continuous review inventory model with a mixture of backordersand lost sales in which the lead time, the order quantity, and the reorder pointare decision variables was studied. Moreover, they also develop a minimaxdistribution free procedure for the problem. While the demands of differentcustomers are not identical in the lead time, then we can't only use a singledistribution (such as Moon & Choi (1998) and Hariga & Ben-Daya (1999))to describe the demand of the lead time. Hence, we correct and extend the modelof Moon and Choi (1998) and Hariga and Ben-Daya (1999) by considering thelead time demand with the mixture of distributions. In addition, we also applythe minimax mixture of distributions free approach to the model by simultaneouslyoptimizing the order quantity, the reorder point, and the lead time to devise a practical procedure which can be used without specific information on demand distribution. 相似文献
65.
LEI Hong-zhen CHEN Hao XU Yi-ping LI Yun 《中国经济评论(英文版)》2007,6(3):41-48
The concept and the characteristic of spread spectrum technology of knowledge network based on information integration environment are given at first. And the basic principle of the wireless network of knowledge and information is recommended. Then a project alternatives using the spread spectrum technology and wireless network is given to build a across-the abroad knowledge network system. 相似文献
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Ben?GroomEmail author Cameron?Hepburn Phoebe?Koundouri David?Pearce 《Environmental and Resource Economics》2005,32(4):445-493
The last few years have witnessed important advances in our understanding of time preference and social discounting. In particular, several rationales for the use of time-varying social discount rates have emerged. These rationales range from the ad hoc to the formal, with some founded solely in economic theory while others reflect principles of intergenerational equity. While these advances are to be applauded, the practitioner is left with a confusing array of rationales and the sense that almost any discount rate can be justified. This paper draws together these different strands and provides a critical review of past and present contributions to this literature. In addition to this we highlight some of the problems with employing DDRs in the decision-making process, the most pressing of which may be time inconsistency. We clarify their practical implications, and potential pitfalls, of the more credible rationales and argue that some approaches popular in environmental economics literature are ill-conceived. Finally, we illustrate the impact of different approaches by examining global warming and nuclear power investment. This includes an application and extension of Newell and Pizer [‘Discounting the benefits of climate change mitigation : how much do uncertain rates increase valuations?’ Journal of Environmental Economics and Management 46 (2003) 52] to UK interest rate data. 相似文献
68.
天津滨海新区区域经济特点、问题与对策 总被引:12,自引:0,他引:12
开发滨海新区是天津市经济发展的重大战略决策。经过7年的高速发展滨海新区已经形成了经济区的基本框架,成为天津市经济的龙头。本文综合分析了滨海新区的区域经济特点及其在发展过程中存在的矛盾和问题,在此基础上提出了加强区域经济持续发展能力建设的对策和建议。 相似文献
69.
研究了基于提前期和价格折扣的延迟交货和库存策略,其中的价格折扣是基于提前期的价格折扣,即当出现缺货而不能在既定的提前期内交货时,企业就会提供一个价格折扣,这时会有一部分顾客愿意等待,直到订单被满足,即延迟交货。其中,愿意等待延迟交货的比例跟提前期成反比关系,提前期的各部分都可以通过增加成本来实现压缩。 相似文献
70.
The availability of a stochastic repairable system depends on the failure behaviour and on repair strategies. In this paper,
we deal with a general repair model for a system using auxiliary counting processes and corresponding intensities which include
various degrees of repair (between minimal repair and perfect repair). For determining the model parameters we need estimators
depending on failure times and repair times: maximum likelihood (ML) estimator and Bayes estimators are considered. Special
results are obtained by the use of Weibull-type intensities and random observation times. 相似文献