内蒙古兴和县三铺水库大坝安全鉴定综合评价

本丈通过工程实例分析了内蒙古兴和县三铺水库的气象水文工程地质环境及其特点，对水库大坝安全进行了论述，提出了存在的问题，通过对水库各要素安全评价，得出水库大坝的类型并提出结论性意见。     

浅谈浆砌石大坝的技术管理

我国坝高15m以上装砌石大坝的有2000多座,作为一类重要的水利工程类型,其安全维护管理任重道远.浆砌石大坝的技术管理是在原有管理经验技术基础之上,对其进行现代大坝安全维护技术和风险管理方法的加强,常规的安全管护技术措施仍为安全维护的基础,其次安全监测评估、隐患事故处置和安全档案管理为三项主要技术内客.     

石城县南坑水库大坝结构计算

石城县南坑水库大坝为浆砌石重力墙堆石坝,与通常的浆砌块石重力坝和堆石坝均有不同之处.本文针对该大坝的特殊结构形式,结合多年的工程实践经验和相关的基本理论,对该大坝进行了结构复核计算.     

浅谈水电站大坝中无基坑施工技术应用

杭州某水电站大坝工程的施工，创新地采用了不做围堰、填砂砾振冲的无基坑施工新技术，并成功地实践，取得了筑坝技术的大突破。本人结合多年工作经验，下面以该工程为例进行探讨。     

新丰水库大坝渗流及稳定计算分析

本文根据新丰水库大坝的运行现状和地质勘测资料,利用有限元法对坝体渗流进行了计算,分析了大坝存在的渗漏问题,并提出除险加固措施.经过计算复核表明,大坝采用复合土工膜+基础帷幕灌浆防渗,坝基坝肩采用砼压浆板+帷幕灌浆进行处理可以有效改变坝体渗流状况、提高坝体的稳定性.其成果可为本工程的大坝安全鉴定和除险加固设计提供参考依据.     

鉴于实例台山核电淡水水源工程碾压混凝土大坝的施工程序

碾压混凝土技术是大坝施工中较为常用的一种技术,它使用一定的掺合料、粗骨料、水、砂等进行拌制,然后使用振动碾对拌制好的混凝土进行铺筑、碾压。采用碾压混凝土技术的坝体具有防渗性能好、体积小、强度高等优点,而且这种技术使用简单快捷,因而被广泛用于工程实际中。本文简要分析了碾压混凝土大坝施工方案的确定和混凝土配合比设计的基本要求,论述了碾压混凝土大坝施工中混凝土的拌制、运输、摊铺与碾压、养护技术。     

水利工程碾压混凝土大坝施工技术的方法

碾压混凝土技术是大坝施工中较为常用的一种技术,它使用一定的掺合料、粗骨料、水、砂等进行拌制,然后使用振动碾对拌制好的混凝土进行铺筑、碾压。采用碾压混凝土技术的坝体具有防渗性能好、体积小、强度高等优点,而且这种技术使用简单快捷,因而被广泛用于工程实际中。本文简要分析了碾压混凝土大坝施工方案的确定和混凝土配合比设计的基本要求,论述了碾压混凝土大坝施工中混凝土的拌制、运输、摊铺与碾压、养护技术。     

云南禄劝水库大坝病害特点及除险加固技术概述

随着我县水库的数量不断增多及使用时间的延续,水库大坝的病险也日益体现出来。大坝存在一定的病害,这是迫切需要我们解决的问题。险加固工程必须要具有可行性、经济性,并要达到除险加固的目的,以及满足安全与环境的要求。本文将对云南禄劝水库大坝病害的特点展开介绍,并对各种坝型病害的加固技术、方法以及措施进行相应的探讨。希望通过本文的相关介绍,对今后的水库除险加固工程有一定的参考意义。     

高寒地区水利工程混凝土施工注意要点

针对水电站建设地处高寒地区,环境气候条件恶劣并进入冬季施工的实际,多措并举做好大坝冬季浇筑保温、保涅、防裂工作,保证了大坝浇筑工作的顺利进行和浇筑质量.     

凤山水库大坝加固工程混凝土防渗墙中冲击钻技术的应用

文章分析了徐闻县凤山水库大坝的现状,并对大坝工程进一步的加固改造,介绍了冲击钻技术在实际防渗墙中的应用.     

DAMS, DAM REMOVAL, AND RIVER RESTORATION: A HEDONIC PROPERTY VALUE ANALYSIS

This article presents the results of a hedonic property value analysis for multiple hydropower sites along the Kennebec River in Maine, including the former site of the Edwards Dam in Augusta, Maine. The effect of the removal of the Edwards Dam on the Kennebec River in Maine is examined through consumer's marginal willingness to pay to be close to or distant from the dam site. Data from both before and after the dam was removed are used to estimate changes in marginal prices. A similar data set is also used to look at the effects of the remaining upstream dams on property values. This article presents one of the first (to our knowledge) ex post analyses on the economic impact of dam removal on property values. As more privately owned dams in the United States come up for relicensing, evaluating the impacts with and without the dam will become increasingly important. This work can help inform those analyses. ( JEL Q25, Q51, Q58)     

民营企业“做大做强”须打破家族式管理

家族式是我国民营企业创业初期效率较高的管理模式。但随着企业规模的扩大和市场环境的改善,传统的家族式管理在决策机制、管理制度、融资结构、人才需求、战略规划、企业信用、企业文化等方面已经越来越不能适应新形势的需要。民营企业要“做大做强”,需要进行相应的改革。     

论社会捐赠的制度激励与保护——5·12汶川地震社会捐赠引发的思考

5·12汶川大地震的社会捐赠,因其捐赠主体范围广、捐赠额度大,受到社会各界的空前关注,也对我国现行社会捐赠制度设计进行了整体透视.在慈善事业相关立法、慈善组织管理体制、税收政策等诸多制度性缺陷充分显现的同时,慈善组织的公信力也面临着严峻考验.本文从完善社会捐赠相关立法、改变政府在慈善事业中的主导地位、建立慈善组织的评价、监督与信息披露机制,以及规范社会捐赠的税收政策等方面,提出了激励与保护社会捐赠,促进我国慈善事业健康发展的政策建议.     

Illuminating the need for ecological knowledge in economic valuation of mangroves under different management regimes — a critique

This is a commentary on a paper by Gilbert and Janssen (Gilbert, A.J., Janssen, R., 1998. Ecol. Econ. 25, 323–346) that deals with valuation of management alternatives for the Pagbilao mangroves, Philippines. Our main critique focuses on the undervaluation of fisheries as well as the inability to quantify the value of ecological services and internalize aquaculture's environmental costs. In addition, the sustainability criteria set up for the aquaculture management alternatives is open to debate. These weaknesses affect the result of Gilbert and Janssen's analysis so that the value of the unexploited mangrove forest is underestimated, and the value and sustainability of converting the forest into aquaculture ponds are overestimated. If applied to decision-making, the erroneous results from this partial cost–benefit analysis may have dire consequences for the mangroves and coastal communities of Pagbilao.     

制造企业服务化价值实现最优构形与调整路径

从价值实现视角，采用扎根理论思想，综合现有文献提炼并确定制造企业服务化价值实现的构形维度。结合华为、联想、小米等企业典型案例，剖析制造企业不同服务化价值实现方式下的最优构形特征，明确制造企业构形调整方向。利用结构方程方法探讨构形维度的作用关系，提出最佳构形调整路径。研究可为制造企业服务化明晰价值实现管理重点，确定最佳构形特征、调整优先序等，提供理论依据与决策参考。     

中国国家公园利益相关者价值共创DART模型构建

中国自2015年建立首个三江源国家公园试点区以来,迄今已建立了10个国家公园体制试点并逐步完善了相应的管理体制和运营机制,有效解决了原有保护地体系存在的多头碎片化管理和过度开发利用等问题。由于各国家公园试点区覆盖面积广、涵盖多种传统保护地类型,所涉及的利益相关者数量众多且关系复杂,因而在利益协调上存在较大难度,而协调好各利益方的利益关系将是国家公园发展成功与否的关键。基于此,在介绍有关利益相关者和价值共创理论背景的基础上,分析了我国国家公园各利益相关者进行价值共创的必要性和可行性,总结了其在利益相关者价值共创探索与实践中的经验和不足,据此提出了构建价值共创DART模型的具体建议。     

Two heads are less bubbly than one: team decision-making in an experimental asset market

In the world of mutual funds management, responsibility for investment decisions is increasingly entrusted to small teams instead of individuals. Yet the effect of team decision-making in a market environment has never been studied in a controlled experiment. In this paper, we investigate the effect of team decision-making in an asset market experiment that has long been known to reliably generate price bubbles and crashes in markets populated by individuals. We find that this tendency is substantially reduced when each decision-making unit is instead a team of two. This holds across a broad spectrum of measures of the severity of mispricing, both under a continuous double-auction institution and in a call market. The result is not driven by reduced turnover due to time required for deliberation by teams, and continues to hold even when subjects are experienced. Our result also holds not only when our teams treatments are compared to the ‘narrow’ baseline provided by the corresponding individuals treatments, but also when compared more broadly to the results of the large body of previous research on markets of this kind.     

The distributional impact of large dams: Evidence from cropland productivity in Africa

We examine the distributional impact of large dams on cropland productivity in Africa. As our unit of analysis we use a hydrology based spatial breakdown of the continent that allows one to exactly define regions in terms of their upstream/downstream relationship at a highly disaggregated level. We then use satellite data to derive measures of cropland productivity within these areas. Our econometric analysis shows that while regions downstream benefit from large dams, no beneficial effects accrue to cropland within the vicinity. Moreover, we find that the productivity enhancing impact of upstream dams is dependent on the local climate. Overall our results suggest that upstream dams have quantitatively on average provided up to 12% of the minimum daily per capita amount of kilocalorie needs in downstream communities and increased agricultural production by 1%.     

基于权利分布风险测度的工程建设重大突发事件大群体应急决策方法

针对大型工程项目突发事件应急决策参与者权利分布导致的风险,提出了一种大群体风险应急决策方法。首先,利用信息熵理论,提出了一种测量大群体决策风险的测度模型;其次,对参与决策的大群体在决策过程中由于权利分布引起的风险进行了定量计算;然后,利用风险大小确定最终偏好信息的集结结果,对应急方案进行排序选优。最后,通过工程项目建设中仓库爆炸突发事件案例分析,验证了该方法的有效性。     

群体决策的风险及规避

群体决策是中小企业民主管理的典型形式。群体决策的存在条件是目标的一致性和内部的团结性。为求得群体行动的一致性,参与决策的人员受到所有者、被尊崇者的权力或个人影响力的作用,容易出现简单接受或否定的群情误判,造成群体决策的风险。在激烈竞争的市场,决策失误是最大的失误。认识群体决策不利的一面,采取规避的机制、方法与应对策略,是提高中小企业决策科学性的必要条件。