多种运输方式对GDP拉动作用分析——以京沪运输通道的面板数据分析为基础

以京沪运输通道的运输量为基础,分析认为自1995年以来,公路运输对区域GDP增长的拉动作用最大,其次是水运,铁路运输对区域GDP增长有明显的瓶颈作用,推断在十二五期间,铁路将对GDP的增长产生显著的拉动作用。     

Short-term forecasting of GDP with a DSGE model augmented by monthly indicators

DSGE models are useful tools for evaluating the impact of policy changes, but their use for (short-term) forecasting is still in its infancy. Besides theory-based restrictions, the timeliness of data is an important issue. Since DSGE models are based on quarterly data, they suffer from the publication lag of quarterly national accounts. In this paper we present a framework for the short-term forecasting of GDP based on a medium-scale DSGE model for a small open economy within a currency area. We utilize the information available in monthly indicators based on the approach proposed by Giannone et al. (2009). Using Austrian data, we find that the forecasting performance of the DSGE model can be improved considerably by incorporating monthly indicators, while still maintaining the story-telling capability of the model.     

求解0-1背包问题的人工蜂群算法

提出了一种用于求解0-1背包问题的人工蜂群算法,详细阐述了该算法求解背包问题的具体操作过程。算法主要使用了两个思想策略:启发式贪婪算法和人工蜂群算法。通过对其它文献中仿真实例的计算和结果对比,表明该算法对求解0-1背包问题的有效性,这对人工蜂群算法解决其它离散问题会有很大帮助。     

园林绿化工程建设项目的成本控制——以嘉和城C1C2地块为例

在工程项目实施阶段,一些项目管理者只注重现场管理,而忽视工程成本和利润管理,背离了项目管理的成本核心。项目管理的成本目标是：合理使用人力、物力、财力,降低成本,增加收入,使项目取得最佳的经济效益。就此,文章阐述了园林工程成本控制的原则和有效途径。