浅谈T3连接线项目环水保管理控制

高速公路建设规模大、建设周期长、资源消耗集中,与社会进步、经济发展和环境条件密切关联,对于环境保护和水土保持既有积极作用,又有消极影响。论文主要结合中川机场T3航站楼连接线建设项目环水保管理方面的一些经验和做法,探讨高速公路建设项目环水保在施工阶段的管理控制要素,提出了环水保标准化管理的建议,供高速公路及其他建设项目的环境保护和水土保持管理提供参考。     

基于MRIO与SNA的中国水资源空间转移网络分析

基于2002年、2007年和2012年的多区域投入产出表的相关数据,利用多区域投入产出(MRIO)模型和社会网络分析法(SNA)分析了中国水资源流动网络的空间关联性和结构特征。结果表明:网络中的链接数量没有随水足迹贸易值的增加而增加,链接路径上的流量不断增加,网络的韧性不够,空间关联渠道有待拓展,存在一定的等级差异,稳定性需要加强;网络中一些省份链接的增加,会削弱其他省份的链接数目,这种可塑性特征有利于在全国范围内合理配置水资源;将网络划分为4个板块,板块间的溢出关系主要是以板块内部为主,且少数板块之间没有任何的溢出关系。     

A customised approach to determining the geomorphic effectiveness of small flood events in a regulated river

The construction of dams significantly alters flow and sediment regimes with subsequent deleterious effects on the morphological and ecological character of rivers. Effective experimental floods can ameliorate the downstream geomorphic impacts of dams. The traditional view is that large floods are required to perform effective geomorphic work, and the geomorphic outcomes of small floods are often overlooked. Many river restoration frameworks do not consider small floods. Yet, there is evidence that the hydrological characteristics that ameliorate specific geomorphic impacts in a river are unique to each river, and a customised approach to setting the right mix of floods (including small experimental floods) is needed. In this study, we modify an existing flood effectiveness model developed for large floods, for determining the geomorphic effectiveness of small floods in a highly regulated Australian river. Two flood classes were added to the model (medium peak stream power and moderate total energy expenditure), and the flood power characteristics were rescaled to reflect the relative difference in the magnitude of the small floods and the magnitude of the geomorphic work performed. Using a step‐wise approach, this customised model determined the geomorphic effectiveness of small floods. The best flood for ameliorating the geomorphic impacts of flow regulation had medium to long duration (10 to 51 days), high peak unit stream power (77 to 123 Wm^?2) and moderate to large total energy expenditure (78,600 to 342,320 × 10³ J). This approach to determining flood effectiveness for small floods is applicable to other geomorphically impacted river channels downstream of dams and can be used to inform experimental flood releases for geomorphic outcomes.     

An Econometric Estimation of Industrial Water Demand in France

This study investigates the structure of industrial water demand byestimating the derived demand for water on a sample of industrialestablishments located in the south-west of France. Productiontechnologies are represented by short-term variable cost functions andapproximated by a translog form. Industrial water use is modeled ashaving three components: the quantity of water bought to a waterutility, the quantity of autonomous water and the quantity of watertreated prior to use. We include in this framework water effluents,which are considered as a by-product of the production process, emittedby firms. Each of the three water components is treated as a separateinput and all are estimated as a system of simultaneous equations. Themodel is estimated on a sample of 51 industrial plants in the Girondedistrict observed from 1994 to 1996 using Seemingly Unrelated Regression(SUR) and Feasible Generalized Least Squares (FGLS). Results ofestimations show that industrial firms are sensitive to water priceinputs. Network water elasticity is estimated at –0.29. It variesfrom –0.10 to –0.79 according to the type of industryconsidered. Autonomous water price elasticity is not significant.Elasticity for treated water is evaluated at –1.42 at themean-sample and varies from –0.90 to –2.21 according to theindustry considered.     

融入长三角 整合区域经济

融入长三角和都市圈、沿江开发等课题,其实质都在区域经济的整合。这是传统计划体制造成行政分割面临市场化、全球化的产物,要经历一个较长过程,才能实现一体化的目标。行政区划与区域整合之间有博奕,出路在于把地方利益与国家利益、人民利益融合起来。目前已在启动,各地不断创新,具体路径宽广,亟待进一步探索。     

浅谈供应链物流管理

供应链管理是跨企业的物流管理，是在整个供应链上应用系统观念进行集成化或一体化的管理。进入21世纪，在全球经济一体化趋势中，更体现出供应链物流管理的重要性。     

灰关联分析在房地产开发方案评选中的应用

项目可行性研究在房地产项目开发决策中得到了广泛的应用，但目前可行性研究主要是进行项目的经济论证，忽视了项目的技术论证，即开发方案的评价。本文首先强调了开发方案评价的重要性，分析了开发方案评价时应考虑的因素，以及这些因素对提高土地利用率、降低开发投资的影响，并拟定了相应的评价指标。通过对评价问题的分析，提出运用灰色数学理论来进行开发方案的评价，并对评价指标权重的确定进行了改进，文章的最后结合具体实例予以验证。     

论珠三角地区现代物流业未来发展趋势

介绍了珠三角地区的区位优势及物流业的发展状况、经营类型和运作模式熏同时结合当今国际物流业的发展态势熏对珠三角地区未来物流业发展的趋势和格局提出看法。     

供应链管理下的采购管理方法辨析

如何对物料采购实施有效的管理以获取竞争优势是由物料的多种因素综合决定的。文章在分析传统ABC分类法的基础上,给出了一种依据价值、质量影响及市场采购的难易程度的一个三维分类模式,并分析给出了在供应链管理下不同物料的采购管理要点。     

基于供应链的物流网络设计研究

比较分析了基于供应链的物流网络的设计特点,并提出了其设计原则与设计步骤.