基于SPCA的我国地区发展评价和分析

唯GDP的考核方式造成了诸多问题。采用稀疏主成分分析构建了新的地区发展评价指数。研究表明,采用该方法是适合的,构造的指数不仅克服了大多数指数权重设置的主观性,能够有效分析地区综合发展水平,而且有利于透视地区发展各个方面存在的不平衡以及历史演进过程。     

海外无形资产投资与企业核心竞争力

本文通过理论与实例相结合的方式研究了知识、品牌、渠道等无形资产的海外投资对提升企业核心竞争力的作用,进而探讨了中国企业实施海外无形资产投资的策略。作者认为,无形资产的海外投资增强了企业在核心技术、品牌形象、市场开拓能力方面的竞争优势,因此应当成为海外直接投资的重点;新建、并购、组建战略联盟是实施海外投资的主要方式;当前的全球经济危机对我国企业寻求海外无形资产有利有弊,投资策略要立足长远、注重风险控制和东道国的投资审核政策。     

冷却剂参数对铣槽喷管低周疲劳寿命的影响

采用有限体积流固耦合计算方法、非线性有限元热结构耦合分析方法和局部应变法研究大面积比铣槽喷管三维再生冷却槽道在循环工作条件下的热结构变形与低周疲劳寿命,并对比分析了冷却剂质量流量与入口温度对铣槽喷管疲劳使用寿命的影响。计算结果表明,铣槽喷管热结构响应呈现复杂的三维效应,应变较大位置主要分布在与肋连接的内衬区域,喷管中部的残余应变量最大；冷却槽道低周疲劳寿命分布和热结构响应基本一致,最小寿命位于喷管中部与肋相连的内衬区域燃气侧；随冷却剂质量流量增加,铣槽喷管低周疲劳寿命不断提高；随冷却剂入口温度增加喷管尾部低周疲劳寿命值不断降低,而喷管中前部的低周疲劳寿命值却不断提高,当冷却剂入口温度为280K左右时,本文的铣槽喷管总体使用寿命达到最大。      

Innovation and diffusion of environmental technology: Industrial NOx abatement in Sweden under refunded emission payments

We study the actual process of technical change in the case of NOx abatement from large stationary sources that have been regulated by very forceful policies in Sweden. Considerable progress has been made in lowering aggregate emissions and this paper seeks to disaggregate average industry improvements to study how much of it is due to innovations by first movers, and how much is achieved by adoption and diffusion of technology. We find both factors very important. Innovation has been rapid: the best firms have cut emissions on the order of 70%. In spite of this, reductions have actually been even more rapid for the majority of firms so that the median firms have caught up with best practice. We analyze various characteristics of the technological change observed.     

中国经济增长要素的实证分析

消费、投资、进出口被喻为拉动中国国民经济增长的三大要素。本文通过建立多元线性回归模型和创新模型，利用1990年到2010年的国民生产总值（GDP）、最终消费支出（FC）、资本形成总额（I）、货物进口总额（IM）、货物出口总额（EX）净出口（t）的数据，分析各个要素对中国GDP增长的贡献率的大小随着时间的变化规律，进而发现中国经济的主要影响因素，最终来确定不同时期GDP增长的主要贡献要素。     

Integration of inventory and transportation decisions in a logistics system

This paper addresses some of the challenges faced by a company which is responsible for delivering coal to its four subsidiaries situated along a river, through river hired or self-owned vessels. We propose to adopt a vendor managed inventory concept that involves establishment of a central warehouse at the port, and apply the Markov Decision Process (MDP) to formulate both ordering and delivery problems, considering different transportation modes, costs, and inventory issues. An efficient algorithm is developed for solving the MDP models. Our computational tests show that the proposed strategy can significantly reduce the overall system costs while maintaining smooth Just-in-Time supplies of coal to the subsidiaries.     

我国汽车租赁业发展中的问题及建议

从1989年第一家汽车租赁公司成立以来,我国的汽车租赁业经过二十余年的发展已具备一定的规模,为我国汽车产业的壮大和经济的增长做出了贡献。但与国外情况相比,我国汽车租赁业发展较缓慢。通过对比国内外行业发展状况,分析我国汽车租赁业目前存在的问题,针对问题借鉴国外的发展经验,可以采用增加宣传、发展信用体制、加强配套法律法规的制定完善、发展长租客户、增加规模化程度、提高管理水平和科技水平、联系相关企业等方式推动行业的进步。     

广义虚拟经济理论的中国文化思想基础研究

从研究中国传统文化出发,立足于经济学哲学思想视角,通过中西方文化思想的比较研究以及东西方经济发展历史的对比分析,讨论文化思想与经济发展的关系,为广义虚拟经济理论研究寻找文化思想基础.研究结果表明,中国传统文化不仅可以为广义虚拟经济理论提供必要的哲学思想依据,也完全可以为发展广义虚拟经济,拓展人类新财富提供极具开发价值的...     

金融危机下流动性过剩问题的分析

在金融危机的大环境下,由于投资储蓄大于消费及贸易顺差不降反升引起的外汇储备继续增加,国家投入到市场中更多的货币,暂时解决了社会财富与货币供求的平衡,但这为今后的流动性过剩的加剧埋下了巨大的隐患,因此政府需要在这个时期就采取措施以适当抑制未来几年内很可能由于流动性过剩加速引起的通货膨胀等不良经济影响。     

Local media ownership and media quality

The Federal Communications Commission regulates local media ownership to promote competition, diversity and the provision of local programming. This study investigates how local media cross-ownership, co-ownership and ownership diversity are associated with media market outcomes. Cross-sectional regressions indicate that television station ownership consolidation is associated with increased local TV news production but lower news ratings. However, panel estimation finds that changes in local media ownership are uncorrelated with local media usage or programming, producing confidence intervals that are tightly centered around zero.