绿色环保经济发展与隧道掘进机再制造探析

为了解决人们对工程机械再制造产品的认识,促进工程机械再制造行业以及再制造技术的良性发展,对机械设备再制造技术以及国内外机械设备再制造产业发展现状尤其是隧道掘进机再制造技术发展情况进行分析研究,探讨再制造产业与循环经济的关系及其相对于维修和翻新技术的优点、发展再制造产业的意义及隧道掘进机再制造的重难点;分析与总结我国隧道掘进机再制造产业的发展现状、前景、隧道掘进机再制造的重点、需要把握好的技术关键,以及促进隧道掘进机再制造良性发展的具体措施,对再制造技术在我国隧道掘进机领域内的推广应用具有一定的借鉴作用.     

贵广铁路双线隧道钻爆法施工机械化配套及适用性分析

为分析双线铁路隧道机械化配套的适用条件,以贵广铁路双线隧道机械化配套的施工资源配置情况为例,从进度、安全、质量和经济指标等要素入手,采用定量与定性相结合的方式,对双线隧道机械化配套适用性进行系统地分析。主要结论与建议如下：1）预测了隧道施工机械化配套在当前及今后不同阶段的适用范围; 2）建议隧道钻爆法施工应优先推广混凝土喷射机械手和沟槽台车的使用,并在Ⅱ级和Ⅲ级围岩占比例较高的大断面长大隧道钻爆法施工中应尽可能地实施机械化配套,最终逐步实现隧道钻爆法施工的全面机械化配套; 3）展望了高度机械化配套的改进方向。     

渝黔铁路对区域旅游经济联系强度的影响

新建的渝黔铁路是一条以客为主、客货兼顾、具有城际功能的快速通道。建成后渝黔间旅行时间将缩短到不到两小时,大大改善了渝黔铁路交通条件,有力地推动了渝黔旅游经济的发展。文章以渝黔铁路沿线区域为研究对象,运用引力模型对沿线区域的旅游经济联系强度进行了定量分析,结果表明,渝黔铁路建成后,两地之间的旅游经济联系强度将由100．61增至2162．62,沿线区域的旅游经济联系强度大夫加强。     

Assessment of coastal zone issues in the Republic of Korea

Abstract

The physical characteristics of Korea have had a profound impact on the uses of the coastal zone that have, in turn, been determined by and reinforced the nation's economic development strategy. While coastal zone management in many developed economies is more heavily oriented toward environmental protection and the resolution of user conflicts, policies for coastal zone management in Korea have emphasized the role of coastal space and other resources for economic development and industrial needs. Increasing demand for land reclamation to provide ever‐increasing industrial sites and human settlements, traditional and future needs of the fishery, and concern for the environment have led to a vast array of competition and, finally, often to conflicts. The basic pattern of coastal zone use in Korea has changed from the linear expansion of coastal zone to integrated coastal uses. An increased number of critical coastal zone issues and interactions was reflected in the creation of new governance that dealt with coastal zone resources and environment.     

Factoring a real value of cargo in port investment and funding decisions

Ports are marine gateways to economic activities. Ports’ ability to perform services depends on their facilities, harbor conditions, and other factors. Generally, ports have control over their facilities but must compete for funding to improve them. As for waterways, in the U.S., a Harbor Maintenance Trust Fund was established to fund dredging, which levies a 0.125% cargo value tax on most shippers using U.S. coastal and Great Lakes harbors. Yet, commonly, a gross tonnage metric is used to allocate the fund’s resources, resulting in under-maintenance of some harbors. This, reportedly, deters additional port funding and hinders valuable commerce. Supplemental economic metrics, such as value of commerce or cargo, can improve port financing decisions, but such data is not readily available. Container ports collect cargo value data in nominal terms, but bulk ports do not. When making economic decisions, however, real values must be used. Further, when allocating resources, decision-makers must be able to assess ports over time and relative to each other. Conforming to these criteria, this paper develops three port financing indicators based on a real value of cargo and illustrates their calculations using the U.S. Port of Duluth-Superior as a case study.     

水泥全深式就地冷再生基层应用研究

结合全深式就地冷再生基层在霍侯一级路路面改造工程的成功运用,简要介绍了全深式就地冷再生的技术原理和混合料的配合比设计及施工工艺,分析了该技术的经济和社会效益。结果表明:全深式就地冷再生基层技术节能环保、工期短、造价低,具有良好的经济和社会效益。     

故障及经济相关下动车组系统动态成组维护策略

为探究不同运量需求影响下动车组复杂系统成组维护策略,基于故障链理论分析部件间故障传递过程,建立故障相关影响下部件可靠度衰退模型.引入运量需求因子描述动态运量需求,建立考虑运量需求的部件维护调整成本模型,基于动态成组方法对部件维护活动进行合并,构建考虑运量需求的动车组复杂系统动态成组模型.算例结果表明:考虑故障相关性对可...     

公路项目经济效益的分类和组成

为了客观地对公路项目进行评价,必须准确、合理地判定和衡量公路项目的经济效益。通过对公路建设的效益综合分析,对公路的经济效益划分为两类,并详细论述了经济效益的组成。     

Logistics as a driving force for development under the Belt and Road Initiative – the Chinese model for developing countries

ABSTRACT

An important objective of “the Belt and Road Initiative” is to promote the economic growth of countries in the region. China’s successful development experience, proposed in the initial stage of reform, can be summarised as “Looking for development, building the highway first”. This study is the first to evaluate whether logistics infrastructure has indeed contributed to economic growth by employing an error correction model with panel data from 2003 to 2014. In addition, we compare the influence levels of different sectors of logistics infrastructure in different regions, i.e. developed and developing regions. We focus on developing regions as they represent good development experiences for developing countries in the Silk Road Economic Belt. For developing regions, we find that the most influential factors are telecommunication and airway transportation, which should be the foci of attention in order to promote economic growth and reduce inter-region economic inequalities. The research confirms that logistics is indeed a driving force for economic growth in China, and that the contributions of specific sectors can be a useful reference for developing countries to determine prioritisation of investment in different logistics sectors across regions.     

浅析高速公路供配电节能技术

供配电系统是高速公路中的重要组成部分,近年来随着我国高速公路建设的迅速发展,供配电系统的电力支出费用越来越大。高速公路的供配电节能技术既要保证公路电力设施的安全性又要保证其节能性,文章针对我国高速公路供配电系统的运营现状,分析供配电节能技术,希望可以有效促进我国高速公路经济效益的增长。