共查询到20条相似文献，搜索用时 782 毫秒
1.
2.
3.
PPP项目绩效水平低下是困扰PPP项目推广应用的主要问题。为了提高PPP项目的绩效水平，从三方的角度，引入系统动力学的方法，分析PPP项目融资绩效的主要影响因素，并设计了四种方案。仿真结果表明政府方的影响因素对PPP项目绩效的影响最大，尤其是政府补贴和政府的优惠政策的影响；其次为社会公众的特许价格和项目的服务质量水平因素对PPP项目的绩效影响；再者是社会资本的合理的融资结构和运营管理水平因素对PPP绩效的影响。最后在综合考虑PPP项目影响因素时，应以此虑政府方、社会公众、社会资本等核心利益方的影响，并从三方的视角提出了提高PPP项目绩效的合理的建议。 相似文献
4.
5.
以江苏省风电产业技术创新联盟为例,提出技术创新网络内知识转移影响因素的层次结构,在专家访谈的基础上综合使用AHP法和DEMATEL法,分析了各影响因素的权重排序、影响因素之间的关系以及在创新网络中的重要性.研究结果表明,地理接近度、结构稳定性和政策吸引力对其他因素有较大影响,同时非正式网络强度、渠道有效性、地理接近度和主体能力对知识转移效果的影响相对较大. 相似文献
6.
朱芳 《内蒙古科技与经济》2023,(19):99-102
通过分析影响高速公路PPP项目融资的主要因素，建立风险评价体系和风险评价标准，结合某高速公路工程，利用层次分析法(AHP)和模糊理论(FCE)计算了该项目的风险指数，为高速公路的融资风险评价提供了技术支撑。 相似文献
7.
通过对以往文献的梳理,按照项目进程识别出PPP项目全生命周期风险因素。在构建全过程风险因素与PPP项目提前终止的因果关系结构模型的基础上,运用AMOS软件对模型进行检验和修正。通过计算各变量之间的效应关系,找出导致PPP项目提前终止的关键风险因素并得出结论。 相似文献
8.
目前中国PPP模式进入了“规范发展新时代”,在生态环境保护、脱贫攻坚等民生短板等方面迎来了新机遇和挑战,然而PPP模式蕴含着复杂风险因素,如何进行有效的风险分担是保障PPP模式顺利实施的关键问题。本文基于讨价还价动态博弈理论,考虑PPP模式中政府部门、项目公司与银行三方博弈过程的不同的出价顺序,分别构建了政府与“弱势同盟”之间、同盟内部之间的风险再分担模型,得出了均衡状态下三方的风险分担比例,并运用德尔菲法专家调查法获取博弈方各自的威慑能力和受摄能力相关参数值对博弈模型进行了验证。研究表明,PPP模式风险分担博弈过程中先出价一方具有“先动优势”,考虑到谈判损耗因子参与方应尽量减少谈判时间和成本,另外,引入公众参与机制可以有效降低政府部门风险分担份额等。 相似文献
9.
近年来可再生能源发展迅速,而可再生能源技术在商业化过程中面临着巨大的不确定性。提出可再生能源技术商业化影响因素的层次结构,综合使用AHP和DEMATEL方法分析各影响因素对可再生能源技术顺利实现商业化的重要性。研究结果表明,企业知识创造能力、政府政策、市场不确定性和补充性资产对可再生能源技术商业化效果的影响相对较大。 相似文献
10.
《软科学》2022,(1):24-29
运用结构方程模型(SEM)构建我国PPP项目可融资性影响因素理论模型,使用1,010份调查问卷获取数据,利用SPSS22.0、AMOS17.0等量化工具实证研究了中国政府与社会资本合作(PPP)项目可融资性的影响因素。实证结果显示：公司融资能力相适性、项目可实现性和财务可持续性对PPP项目可融资性具有显著正向影响;财务可持续性分别在公司融资能力相适性、项目可实现性、政府履约保障可靠性、增信措施有效性与PPP项目可融资性之间具有中介作用,而在金融生态环境稳定性与PPP项目可融资性之间不具有中介作用。最后,分别从政府方、社会资本方和银行的角度提出政策建议。 相似文献
11.
A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
12.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
13.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
14.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
15.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
16.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
17.
Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
18.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
19.
Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
20.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献