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81.
Recently, dramatic flood disasters have occurred incrementally in several regions of the world. Land-use change as one of the main affecting factors becomes a key component in flood risk management. This study strives to deal with quantifying how changes in land use to affect the dynamic evolution of flood vulnerability. The floodplains of Wuhan, which are located in the Yangtze River Basin, have been selected as an example. In this paper, we use GIS to gather different historical geometric data as sources of land-use information. By proposing the Simpsons-dominance index and location index to analyze the characteristics of land-use changes, and building a quantitative model to measure flood vulnerability, a series of flood vulnerability maps demonstrate differential flood vulnerability of floodplains of Wuhan in three inundation scenarios and four historical periods. Finally, the non-parametric correlation is used to reveal the interactive effect of land use and flood vulnerability. Based on this study, comprehensive flood disaster management strategies for land-use planning are proposed for government decision-makers to reduce the flood vulnerability of Wuhan in future. 相似文献
82.
通过我国目前技能型紧缺人才的现状分析,对未来几年技能型紧缺人才的状况与演变趋势加以研究和讨论,进一步提出我国的技能型人才的短缺已成为制约我国经济发展的瓶颈。 相似文献
83.
84.
《International Business Review》2016,25(6):1185-1196
This paper develops and tests a set of hypotheses regarding factors that influenced the longevity of foreign research and development units in Swedish multinational enterprises over the period 1992–2012. The results reveal an underexplored aspect of the R&D internationalization—the volatility of foreign R&D laboratories. During the investigated period, more than 40% of the R&D units in the sample had been terminated. The results substantiate earlier research regarding the negative effects of mergers and acquisitions on R&D in acquired units but show that these effects are not immediate. They appear – if at all – with a time lag of several years. The hazard of closure for an individual unit seems to be more strongly related to its role and position within the MNE than to local country characteristics. It was smaller for strongly locally embedded units and units with global mandates, but – contrary to expectations – the hazard was greater for units highly integrated with the rest of the MNE. 相似文献
85.
Wim Vanhaverbeke Patrick Van Cayseele 《Economics of Innovation and New Technology》2013,22(3):185-202
Since the invention of the European Patent System, national patent systems have continued to co-exist, although they did lose appeal. How have the different national systems been affected in view of their characteristics? In order to answer this question a constant-market-share (CMS) analysis is carried out. While on a theoretical level, the different elements adding to the appeal of each patent system are discussed, the CMS-analysis reveals the importance of country size in that the national systems of smaller countries lose. 相似文献
86.
Chaozhi Zhang 《Journal of Sustainable Tourism》2013,21(2):214-233
This paper addresses the dynamics of the evolution of a nature-based destination in China. Based on longitudinal studies in Zhangjiajie (Hunan Province), it focuses on the roles of institutions in tourism development in China, demonstrating the centrality of institutions and governments in fostering destination development through policy orientations, attracting investments and regulations in their capacity as producers, protectors and promoters of desired processes of change. It describes a five-stage development process from Exploration, through Starting and via Fluctuation and Acceleration to the current stage of Transition leading towards a Destination seeking Better Service Quality. The study, by incorporating institutions as a driving force, develops an RICI model (Resource, Institution, Capital and Innovation) accounting for destination development in China. The key role of policies implemented by local governments and the roles of institutions are critical in the process of its development, especially in the earlier stages, contrasting with many western countries, where the private sector and central government tend to dominate. The paper notes the role of inter-institution rivalries, and the impact of those rivalries on sustainable development. It is suggested that the proposed model could be empirically verified and tested in other cultural or regional destination development contexts. 相似文献
87.
《Latin American Business Review》2013,14(1):61-75
ABSTRACT Ronstadt observed that R&D laboratories in foreign subidiaries of American multinationals follow an evolutionary pattern of development. First, these laboratories adapt foreign technology to the local conditions and local raw materials. Later, laboratories focus their activity in obtaining product quality. In the last stage, these R&D units generate new technology of a long-term or exploratory nature for the corporate parent. Based on this theoretical background, this paper studies the evolution of R&D investments in polymer firms in Brazil. The methodology used was a case study conducted in 5 firms from the polymer area, complemented with secondary sources. RESUMEN. Según Ronstadt, los laboratorios de I&D de las subsidiarias extranjeras de las multinacionales norteamericanas, cumplen un programa de desarrollo evolucionario. En primer lugar, estos laboratorios adaptan las tecnologías extranjeras a las condiciones locales y las materias primas existentes. A continuación, los laboratorios orientan sus actividades en obtener un producto de alta calidad. En la última etapa, estas unidades de I&D generan nueva tecnología de características a largo plazo o naturaleza exploratoria para la corporación matriz. Usando como base estos antecedentes teóricos, este documento estudia la evolución de las inversiones realizadas por las empresas de polímeros en el campo de la I&D en el Brasil. La metodología utilizada fue un estudio de caso realizado en 5 empresas fabricantes de polímeros, complementado con otras fuentes secundarias. RESUMO. Ronstadt observou que os laboratórios de R&D em subsidiárias estrangeiras de multinacionais americanas seguem um padrão evolutivo de desenvolvimento. Primeiro, estes laboratórios adaptam a tecnologia estrangeira às condiç[otilde]es e às matérias-primas locais. Posteriormente, os laboratórios focalizam a sua atividade na obtenção da qualidade do produto. E, finalmente, estas unidades de R&D geram uma nova tecnologia para a matriz de natureza exploratória ou de longo prazo. Baseado nesta experiência teórica, este trabalho investiga a evolução dos investimentos de R&D em empresas de polímeros no Brasil. A metodologia usada foi um estudo de caso conduzido em cinco empresas da área de polímeros, complementada por fontes secundárias. 相似文献
88.
With the continuous development of the Internet and information technology, online shopping has become a popular purchase mode. The in-depth analysis of consumer decision-making in online shopping is an important issue. Our purpose is to study how the factors of the shopping web pages corporately affect online purchase decisions and determine which are the core factors that affect consumer purchase decisions. We screen the influencing factors on the shopping webpage and deploy e-commerce network evolution based on various weight combinations of these factors to generate sales distributions of online products. By comparing these simulated sales distributions to the real data, the optimal weight of each factor is obtained. The results show that sales volume and the number of high-quality negative comments are the most important factors influencing consumers' decision-making, the number of comments and the number of comments with pictures are relatively minor factors, store type and video presentation of the products have the least impact. The optimal simulated sales distribution is very close to the real case and verifies that the introduced network evolution technology is applicable. The proposed model can be used as a uniform evaluation platform for correlational study, which is an important link in the purchase research chain. 相似文献
89.
公司治理的演进过程也是所有权和控制权以及经营权分离的过程。通过对英美国家公司发展不同时期两权分离的历史考察,发现两权分离与公司治理演进之间存在依存关系:两权分离依次经历了所有权和经营权分离、所有权和控制权分离、控制权和经营权分离和同股不同权等阶段,不同形式的两权分离带来不同的公司治理问题,从而产生相应的治理手段,推动着公司治理的演进。通过对中国企业改革和发展过程的历史回顾也证明了两权分离与公司治理之间存在共同演进关系。针对研究发现,最后提出了我国公司治理改革的方向性建议。 相似文献
90.
国际商业银行监管模式演进及对我国的启示 总被引:2,自引:0,他引:2
随着世界银行业的变革和发展,银行规制理论和监管模式日趋完善.从世界银行业监管历史来看,国际商业银行监管模式渐渐由"刚性"、"半刚性"向"柔性"转化,先后经历了行政命令式、标准化方法、内部模型法、预先承诺法四个规制阶段.随着我国成功入世及银行业改革不断向纵深推进,现有银行监管模式将面临强有力的挑战.为此,加强银行规制理论研究,探索国际商业银行监管模式演进轨迹,对构建我国有效银行监管模式将起到重大启示和推动作用. 相似文献