公共住房项目PPP模式研究

公共住房建设是政府实现住房领域公平目标的重要手段,但由于其社会福利属性,面临着资金来源不足、后续发展乏力的困境。文章将普遍应用于国内外基础设施领域的PPP模式引入公共住房建设领域,对PPP模式的中国公共住房项目进行内部、外部条件分析,论证研究的可行性;在此基础上结合经济适用房与廉租房的不同特点探索具体操作形式;对保障高效合作的运行机制进行探讨,以推进城镇公共住房建设发展。     

油气管道环焊缝新型修复技术研究

为了寻求适应高钢级油气管道环焊缝缺陷的新型修复方法,克服传统修复技术的局限性,提出了电弧增材制造技术用于油气管道环焊缝修复的可行性。首先,对激光熔覆、冷喷涂、电弧增材制造3种新型修复技术进行对比分析后,采用电弧增材制造技术进行实验研究;其次,在X80管道环焊缝处沿轴线截取22 mm厚的试样,并在环焊缝处设计坡口角度为60°,坡口深度为11 mm的缺陷,采用电弧增材制造冷金属过渡工艺、ER50-6焊丝进行修复实验;最后,对修复试样进行力学实验测试,并对实验数据和断口形貌进行分析。实验结果表明,电弧增材制造修复后试件抗拉强度最高达639 MPa,强度与管体基材匹配。研究结果表明,电弧增材制造技术用于X80油气管道环焊缝缺陷的修复是可行的,具有沉积效率高、成本低、力学性能能满足修复要求的特点,对于高钢油气管道环焊缝缺陷修复的可行性和经济性具有重要的现实意义。     

Political hazards and firms' geographic concentration

Research summary : We examine the relationship between the geographic concentration of a firm's sales and the firm's vulnerability to expropriation hazards. Although expanding outside the home location can initially increase a firm's exposure to government expropriation, we find that this effect reverses when a firm's sales outside its home location have reached a point at which it has sufficient resources to better influence government actions and to pose a credible threat to exit the market in which it is being targeted. We supplement this main result by identifying two moderating factors: the firm's level of political capital and the effectiveness of institutional constraints on government behavior. We find support for these hypotheses from survey data on privately owned enterprises in China. Managerial summary : This research advises firm managers that certain market activities might knock their firms' economic interests out of alignment with the government's political interests, and thus, influence the political hazards they face, particularly in emerging markets such as China, which has attracted strong interest of many firms with respect to entering the market. Here, all else being equal, the firms' geographic concentration exposes them to different levels of state expropriation—but not in a simple linear fashion as suggested by the conventional wisdom of local protectionism or that of the bargaining advantage generated by the threat of relocation: Those who are “stuck in the middle” ended up paying twice or even three times as much unauthorized levies as the purely local or the most expansive firms. Copyright © 2015 John Wiley & Sons, Ltd.     

谈民营经济在城乡一体化进程中的作用

民营经济是民生经济,是促进县域经济发展的主体,是联结工农、城乡的桥梁和纽带。近年来德州市高度重视民营经济的发展,创建了德州模式,民营经济在城乡一体化进程中发挥了主力军的作用。本文着重阐述民营经济大发展对推进城乡一体化进程的重大意义;发展民营经济与推进城乡一体化进程相结合的用法;充分发挥民营经济在城乡一体化进程中主力军作用的建议等,对民营经济发展和推进城乡一体化进程工作具有启示作用。     

时序分析在地下洞室变形监测数据处理中的应用

时序分析法是广泛应用于多领域的统计分析方法,在岩土工程数值分析当中也有广泛应用,SAS/ETS(Ti me Series Forecasting)时序分析系统是一种智能化时序分析工具,本文运用SAS数据挖掘工具中时序分析组件对某水电站地下引水发电系统原位监控位移时间序列进行时序预测分析。实践表明,SAS/ETS时序分析方法基本能反映出蕴涵在位移序列中的岩体变形规律,预测结果与实测结果一致,可以运用于工程实践。     

FDI企业对我国私营企业科技创新能力的影响研究

本文利用DEA-Malmquist指数分析方法对FDI企业与我国私营企业2003～2012年全要素生产率进行了测算,结果显示：FDI企业的全要素生产率及增长率都高于我国私营企业。说明FDI企业的科技创新能力要强于我国私营企业。其主要原因是FDI企业通过多种方式和渠道对我国私营企业的科技创新能力产生了重要影响。本文通过实证分析表明, FDI企业主要通过科技创新能力、市场集中度及分工地位对我国私营企业的科技创新能力产生作用。     

设施管理研究的进展

针对目前设施管理行业巨大的发展潜力以及国内设施管理研究相对滞后的现状，在分析大量国外资料的基础上，回顾了设施管理的发展历程，介绍了设施管理的范围、内容、涉及的主要问题及其绩效评估的研究进展，探讨了设施管理的未来研究方向。     

Facilitating public participation in tourism planning on American Indian reservations: A case study involving the Nominal Group Technique

Tourism is frequently cited as a tool by which American Indians can strengthen the economies of their reservations. However, successful tourism development on such reservations requires effective tourism planning, and effective tourism planning requires public participation in the planning process. The Nominal Group Technique (NGT) has proved to be a useful group process in the tourism field but its application to tourism planning on American Indian reservations has been unexplored. This article helps to fill this knowledge gap by reporting on an NGT workshop conducted on the Lake Traverse Reservation of the Sisseton–Wahpeton Oyate (people, nation) in North and South Dakota, USA. Rich information on tourism development possibilities for three lakefront properties was obtained. Possible success factors are discussed and suggestions for conducting similar future workshops on American Indian reservations are advanced.     

A model of community-based festival image

This study initiates an original inquiry into the image of community-based festivals (CBFs). A CBF image model was proposed and empirically tested based on existing destination image models. Four image constructs were identified as Attributes, Family and Friendliness, Affective Association, and Overall Evaluation. The interrelationships among these constructs were tested by structural equation modeling. The findings revealed that Attributes affects Family and Friendliness and Affective Association, which in turn, affects Overall Evaluation. This study also included visitor loyalty in the understanding of CBF image. It was found that repeat visitors had more favorable perceptions of the CBF than did first-time visitors. Significant perceptual differences were found in Family and Friendliness, Affective Association, and Overall Evaluation between the two groups of festival goers. In addition, it was revealed that loyalty exerted significantly negative interaction effects on the relationship between Attributes and Family and Friendliness, as well as the linkage between Family and Friendliness and Overall Evaluation. In addition, this study illustrated the importance of the support of local residents for CBFs. CBF planners and local tourism organizations would benefit from this study in terms of cultivating visitor loyalty to these festivals and building the destination's brand.