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211.
212.
企业集群与供应链的共生性研究 总被引:13,自引:0,他引:13
针对具有时代经济特点的产业企业集群和为适应并驾驭这种经济的供应链模式,讨论了二者在具体运作过程中相互依存共同发展的共生性和战略目标上的趋同性,试图阐明二者协调发展的共生机理。 相似文献
213.
Aurora Pons-Porrata Rafael Berlanga-Llavori José Ruiz-Shulcloper 《Information processing & management》2007
In this paper, we present a topic discovery system aimed to reveal the implicit knowledge present in news streams. This knowledge is expressed as a hierarchy of topic/subtopics, where each topic contains the set of documents that are related to it and a summary extracted from these documents. Summaries so built are useful to browse and select topics of interest from the generated hierarchies. Our proposal consists of a new incremental hierarchical clustering algorithm, which combines both partitional and agglomerative approaches, taking the main benefits from them. Finally, a new summarization method based on Testor Theory has been proposed to build the topic summaries. Experimental results in the TDT2 collection demonstrate its usefulness and effectiveness not only as a topic detection system, but also as a classification and summarization tool. 相似文献
214.
A straightforward way to prevent students from leaving education without a higher secondary diploma is increasing the compulsory education age. The idea is that, by staying longer in school, more students eventually obtain a higher secondary diploma. This paper examines the impact of a one-year increase in compulsory school-age on dropping out of secondary education by a difference-in-differences analysis. For this, we exploit a recent compulsory education policy reform in the Netherlands. After controlling for confounding factors and observable covariates, we find that the one year increase in compulsory school-age reduces dropout by 2.5 percentage points. The effect, however, is entirely situated in the group non-liable to the policy reform. We observe that native Dutch vocational students, mostly without retention in grade, but also without a higher secondary diploma at hand, more often left school in the immediate period before the policy reform. Given the economic revival at that time, this may reflect anticipation of labor market opportunities. 相似文献
215.
美国媒体金融危机预警报道等方面的缺失和公信力的大幅下降,反映了新自由主义经济政策影响下美国媒体日趋垄断化,导致新闻日益商业化和娱乐化,发生了根本性的质变。 相似文献
216.
Daniel Torres-Salinas lvaro Cabezas-Clavijo Rafael Ruiz-Prez Emilio Delgado Lpez-Czar 《Library & information science research》2011,33(2):168-174
A metric analysis of blogs on library and information science (LIS) between November 2006 and June 2009 indexed on the Libworm search engine characterizes the community's behavior quantitatively. An analysis of 1108 personal and corporate blogs with a total of 275,103 posts is used to calculate survival rate, production (number of posts published), and visibility via such indicators as links received, Technorati authority, and Google's PagePank. Over the study period, there was a 52% decrease in the number of active blogs. Despite the drop in production over this period, the average number of posts per blog remained constant (14 per month). The most representative blogs in the discipline are identified. The emergence of such platforms as Facebook and Twitter seems to have meant that both personal and corporate blogs have lost some of their prominence. 相似文献
217.
高校图书馆员的知识服务能力建设 总被引:2,自引:0,他引:2
加强高校图书馆员知识服务能力建设是图书馆有效开展知识服务的基础。本文分析高校图书馆知识服务方面存在的问题,探讨高校图书馆员知识服务能力的构成要素,并从服务理念、人才管理、学术素养、信息素质、服务增值、激励机制等方面提升高校图书馆员知识服务能力与水平,以满足读者的需求。 相似文献
218.
随着软件业的高速发展,各个高校为了应对不断进步的软件技术,提高软件人才的市场竞争力,很多高校把Java语言作为自己的软件专业教学语言,并针对Java语言教学模式改革和教学内容展开研究和探讨,民办院校和普通高职高专相比更具有灵活性,更加针对市场需求等特点就更加要求软件教学面向市场需求,本文从Java语言的市场需求和自身特点出发,结合民办高校特点,对民办高校Java语言课程实训课程教学进行探讨。 相似文献
219.
Cañal-Bruland R Mooren M Savelsbergh GJ 《Research quarterly for exercise and sport》2011,82(4):667-674
In this study, we examined how perceptual-motor expertise and watching experience contribute to anticipating the outcome of opponents' attacking actions in beach volleyball. To this end, we invited 8 expert beach volleyball players, 8 expert coaches, 8 expert referees, and 8 control participants with no beach volleyball experience to watch videos of attack sequences that were occluded at three different times and to predict the outcome of these situations. Results showed that expert players and coaches (who were both perceptual-motor experts) outperformed the expert referees (who were watching experts but did not have the same motor expertise) and the control group in the latest occlusion condition (i.e., at spiker-ball contact). This finding suggests that perceptual-motor expertise may contribute to successful action anticipation in beach volleyball. 相似文献
220.
Evidence suggests the development of fundamental movement skill (FMS) is a key factor in promoting long-term physical activity. Low levels of activity among preschool children and the relationship between physical activity and the development of fundamental movement skills underline the need to determine the factors associated with children's development of such skills. As parents play an important role in the socialization process, the aim of this study was to examine correlates of family and neighbourhood characteristics as well as parental behaviour and beliefs on FMS performance in 4- to 6-year-old preschool children. Relationships between preschool children's FMS performance and family contextual variables were examined within a sample of 846 preschool children. Results identified positive associations of FMS performance with parental education, father's physical activity, transport to school by bicycle, and the high value placed by parents high on sport-specific aspects of children's physical activity. Variables negatively associated with preschool children's FMS performance included father-child interaction in TV-viewing and reading books, the high importance placed by parents on winning and performance in children's physical activity. Furthermore, the ambiguity of associations between FMS performance and parental beliefs underlined its complexity. 相似文献