基于主材的输电线路工程本体费用估算方法

与通常利用设计工程量、安装定额、取费定额和专有的建设预算软件编制输电线路工程本体匡算方法相比,基于主材的输电线路工程本体费用估算方法简单易行且通俗易懂。案例分析表明,该方法可行、可靠和便捷。可用于多方案比较和设计方案优化、计算和控制初始投资等;便于非技术经济专业人员参与工程项目的审核,它不需使用专业造价软件,使用计算器、电子表格即可。

Threshold Effects in the Capital Account Liberalization and Foreign Direct Investment Relationship

This paper examines how capital account liberalization （CAL） affects foreign direct investment （FDI） inflows. Authors use a dynamic panel model encompassing 14 Middle East countries over the period from 1985 to 2009. The findings suggest that countries that are able to reap the benefits of the capital openness policy satisfy certain threshold conditions regarding the level of financial development and institutional quality. Thus to promote FDI, governments in this region should develop a set of policies that not only focus on financial openness, but also on the improvement of the financial system and legal institutions.

几种边界条件对节能导线年费用的影响分析

与等外径的普通钢芯铝绞线相比,节能导线直流电阻较小,在不降低机械性能的前提下,可减少输电线路损耗,达到节能效果。结合某典型500 kV交流双回路线路工程,以普通钢芯铝绞线为基准对比分析了3种等外径的节能导线方案(钢芯高导电率铝绞线、铝合金芯铝绞线、中强度铝合金绞线)的电能损耗、本体投资,通过分别对比几种不同边界条件(输送容量、电价、导线市价)下的各导线方案的年费用,提出了3种节能导线在各边界条件下的适用范围,为工程中节能导线的选型和推广应用提供了参考。