薄片生产阻燃式反吹风储料器的改进设计

由于阻燃式反吹风料仓内部风力输送系统,在使用过程中容易造成风压过大,导致气流中夹带的烟粉和烟粉末在超标压力下大量外扬,通过采用增设负压装置平衡系统内气流压力的方案,有效改善了除尘效果。另外,用带分度盘的皮带传动替代了复杂的行星摆线针轮减速器,节省了投入,且操作维护简便。     

基于人工免疫的乳品供应链质量安全风险预警研究

针对日益凸显的乳品质量安全问题,建立及时有效的乳品预警机制已经变得至关重要。文中从供应链的角度构建乳品质量安全风险指标体系。结合人工免疫及负选择算法并加以改进,建立基于人工免疫的乳品质量安全风险模型,并对某乳品企业的乳品质量安全风险进行了预警分析。研究结果表明文中建立的乳品质量安全风险预警模型能够定量分析乳品质量安全状态并有效预警,为实施乳品安全供应链监管提供了新思路和方法。     

Stock Externality vs. Symbiosis in a Forest-Air System

Stock externalities and ecological interaction have similar equilibrium effects. The influence on the dynamics of an ecosystem, however, is quite different. The different effects are laid out theoretically in the context of a forest-air model. We compare a centralized, welfare-maximizing policy and decentralized policies. Finally, we numerically simulate the dynamic differences between stock externalities and ecological interaction.     

中国股市波动有限理性归因实证分析

基于中国股市波动特征构建了中国股市的两类机构投资者（积极投资策略和保守型投资策略的机构投资者）投资理性模型。随后,借助计量软件对上证指数的时序数据和这一模型生成的数据进行拟合分析．分析这两个有限理性投资者对上证指数的超额波动所起的作用。最后,利用格兰杰检验法．检验这些变量之间的解释程度。     

The Media's Role in Influencing Perceptions of Housing Values and the Resulting Impact on the Macroeconomy

The housing market is a major component of the economy and persistent negative media reports can adversely affect perceptions and expectations of homeowners as to the value of their home. As a result, households reduce their expenditures and increase their savings in an effort to rebuild lost wealth. In the short run the economy suffers and the recession is magnified. This paper demonstrates, through an empirical study, how negative media reports regarding the deteriorating conditions of the national housing market affects what households feel their housing is worth.     

MULTISIM软件在模拟电子技术课程教学中的应用

电子技术教学,尤其是模拟电子技术的教学,一直是老师们在研究的问题。一直以来,学生们都认为模拟电子技术这门课程是不好学习的。如今电脑已经非常普及,学校也能够为学生上课提供足够的电脑。那么就我们可以使用MULTISIM软件来教授和学习电子类的课程。本应用MULTISIM软件解决了模拟电子技术课程中很重要的带负反馈三极管两级放大电路的反馈分析以及交流参数的计算问题。     

双边市场视角下的中国特大型城市展览馆定价行为和机制研究

展览市场具有双边市场的性质：以展览馆作为平台企业,连接参展商和参观者两类市场顾客,来进行交易性的或展示性的活动。本文在双边市场理论模型的基础上,结合满足中国展览业国情,尤其是特大型城市展览馆的运营特征,从非对称条件的角度构建了3种展览馆定价机制模型：（1）参展商可以识别不同类型观众;（2）参展商不可以识别各种类型的观众;（3）展览馆对不同类型观众进行参观时段限制。通过三种模型的推理与演算,我们对特大型城市展览馆的定价行为和机制进行了定量研究,在得出最优解的同时我们还结合实际对模型的结构进行了深入分析,使得本论文不仅在理论和研究方法上有所突破,更具有实践上的指导意义。     

桩基负摩阻力特性研究探讨

在桩基工程中,因负摩阻力问题造成工程事故屡有发生,负摩阻力问题相关研究现在越来越受到重视。本文介绍了桩基负摩阻力产生机理及影响因素,简要论述了其研究现状,并探讨了现今桩基负摩阻力特性研究中存在的主要问题。     

COPENHAGEN,CANCÚN AND THE LIMITS OF GLOBAL WELFARE ECONOMICS

The rise of a global welfare economics directed at the environmental challenges facing our planet represents a new policy phenomenon. This paper examines the most ambitious attempt so far to put such economics into practice via the Kyoto Protocol and more specifically the Clean Development Mechanism of the Protocol. The Copenhagen and Cancún climate change conferences have put an end to hopes of the Protocol serving as an effective tool in the mitigation of global warming. This failure of the new global welfare economics is the result of flawed principles, not just defective implementation.     

Spatial externalities and agglomeration in a competitive industry

We introduce spatial spillovers as an externality in the production function of competitive firms operating within a finite spatial domain under adjustment costs. Spillovers may attenuate with distance and the overall externality could contain positive and negative components with the overall effect being positive. We show that when the spatial externality is not internalized by firms, spatial agglomerations may emerge endogenously in a competitive equilibrium. The result does not require increasing returns at the private or the social level, increasing marginal productivity of private capital with respect to the externality, or location advantages. In fact agglomerations may emerge with decreasing returns to scale, declining marginal productivity of private capital with respect to the externality, and no location advantage. The result depends on the interactions between the structures of production technology and spatial effects as shown in the paper. No agglomerations emerge at the social optimum when spillovers are internalized and diminishing returns both from the private and the social point of view prevail. Numerical experiments with Cobb–Douglas and CES technologies and an isoelastic demand confirm our theoretical predictions.