Window Opened to the World

It is the 30th anniversary of China to carry out the reform and opening up policy. Before the reform and opening up policy, China had struggled a long time to keep pace with the world. When we looked back on the nearly door-close time, we may feel lucky that there is window opened to .the outside world at the first period of the foundation of P.R.C. that is what we have been already very familiar with today, the China Import and Export Fair, also called the Canton Fair fbr short.     

如何使用Excel构建动态图表

本文通过实例演示的方式,逐步解析了如何使用Excel来创建动态图表,用简便的窗体控件增强了数据的表现力,使图表的使用者能够直观地动态观察和演示数据的变化趋势,具有很好的理论价值和实际意义。     

人口老龄化对医疗需求与保障的影响和对策

人口老龄化,特别是“未富先老”,给社会保障制度不够健全的中国带来了巨大的挑战。我国当前的基本医疗保险制度,还不能很好地解决老年医疗和护理需求与供给的矛盾;我们要利用“人口机会窗口”化解人口老龄化带来的医疗保障和老年护理问题,实施健康老龄化战略,改革和完善基本医疗保险制度,并建立社会化老年护理制度。     

Dynamic model averaging in large model spaces using dynamic Occam׳s window

Bayesian model averaging has become a widely used approach to accounting for uncertainty about the structural form of the model generating the data. When data arrive sequentially and the generating model can change over time, Dynamic Model Averaging (DMA) extends model averaging to deal with this situation. Often in macroeconomics, however, many candidate explanatory variables are available and the number of possible models becomes too large for DMA to be applied in its original form. We propose a new method for this situation which allows us to perform DMA without considering the whole model space, but using a subset of models and dynamically optimizing the choice of models at each point in time. This yields a dynamic form of Occam׳s window. We evaluate the method in the context of the problem of nowcasting GDP in the Euro area. We find that its forecasting performance compares well with that of other methods.     

我国棉花产业进口现状原因浅析

文章运用协整分析方法,阐述了我国棉产业进口状况,研究表明:价格差距拉大是导致棉花进口量大幅攀升的直接原因。     

有里程和软时间窗约束的开放式多车场集送货一体化车辆路径问题研究

基于现代物流业的现实状况和实际需求,研究了一个带有里程和软时间窗约束的开放式多车场集送货一体化车辆路径问题。给出一个遗传算法对该问题进行求解。在该算法中,为了提高其性能,并全面考虑所有约束,论文采取如下措施:(1)在初始种群形成之前,将各个任务的送货点按时间窗进行排序;(2)在所有任务的一个序列中用里程约束来控制车场的插入,并对软时间窗约束采取加入惩罚的方式解决。最后论文举例对该遗传算法进行说明,并对进一步的研究工作进行了展望。     

浅谈岩质顺层边坡结构面力学指标的确定方法

控制岩质顺层边坡稳定性的主要因素为岩层结构面,确定岩层结构面的力学指标方法较多,不宜单独采用,应采用多种方法综合确定。本文结合工程实例,浅谈顺层结构面力学指标的确定方法。     

浅谈住宅渗漏的防与治

针对住宅竣工后经常会出现渗漏的问题,提出了一种有效的防治途径。     

DEA视窗分析在技术创新效率评价中的应用

本文对DEA视窗分析模型进行了介绍,并将其运用于东北三省技术创新效率评价研究。