三网融合背景下华数传媒集团的跨界探索及启示

杭州华数传媒在数字电视发展伊始,就将数字电视定位为家庭信息化终端和城市信息化综合平台进行跨界发展,从而使数字电视获得了较为广阔的可持续发展空间。在三网融合的背景下,华数传媒的跨界探索对其毳数字电视运管企业而吉,具有重要的启示。     

国际人才研究关键节点文献演进的可视化分析

文章运用citespace可视化软件,绘制了SSCI数据库中1999—201O年间发表的以“talent$”为主题词的文献共引网络图谱,通过分析关键节点文献,对国际人才研究的前沿及其演化进行了初步探讨,发现国际人才研究传统上主要从心理学视角展开,近年来逐渐倾向从经济学角度开展研究,另外管理学和科学社会学也是两种补充研究思路。     

复杂网络软件分析与评价

如今,复杂网络数据规模膨胀,文字和表格已无法展现其内部结构,同时妨碍了复杂网络隐藏信息的挖掘,复杂网络分析工具的产生解决了上述难题。文章归纳总结了复杂网络理论的基本内容,在广泛调查现有复杂网络处理软件的基础上,分析比较了各个软件的功能,提出量化评价指标,并对各个软件进行分析评价。     

The efficacy of small internal networks for improving schools

Through two school case studies in Cyprus, in this paper I explore the role of small internal collaborative networks in promoting school improvement. The analysis of the two cases revealed a series of interrelated themes which indicated issues related to school improvement, and actually, it provided evidence that small internal collaborative networks could contribute to school improvement. This contribution was related to the development of interest in the learning of children coming from vulnerable groups, to the creation of conditions for more effective leadership and management within the schools, and to changes in the culture of the schools.     

Editorial

Leadership for learning (LfL) is conceived as a network rather than as a centre within the University of Cambridge Faculty of Education. This paper explores what is understood by the term network, both within LfL and in the wider educational and research communities, and how these understandings are reflected in a number of projects carried out under the aegis of LfL over the last three years. The paper draws out the key distinguishing features of these activities and, using the five principles of leadership for learning, explores the degree to which these activities have contributed to the creation and transfer of new knowledge. The paper concludes by proposing a model for knowledge-building which draws on the work of LfL and suggests ways in which this model may be of use to the wider educational community.     

Validating farmers' indigenous social networks for local seed supply in central rift valley of Ethiopia

Abstract

The information on farmers' indigenous social networks in local seed systems is based on a case study undertaken in the central rift valley of Ethiopia. Farmers' indigenous social networks (social relation, locally developed seed exchange methods and local institutions) are presented as leverage mechanisms for the survival of local seed systems. A farmer decision to acquire seeds is discussed as an act of making a choice between whether to obtain a new germplasm/maintain old ones (genetic diversity management) or a search for renewable physical input (seed) or to take advantage of each merit in specific situations. This clearly underscores the need to value the individual merit of a seed before putting in place any type of variety selection, seed multiplication or extension programs. Analysis of the case study leads to the conclusion that the government imposed extension program should focus on institutional transformation of farmers' indigenous social networks in order to validate the complementary role of local seed systems in the development of a national seed industry.     

基于多人博弈的无线传感器网络簇内信息融合算法

利用多人博弈的思想对簇内节点间协作和竞争的关系进行分析,提出一种簇内信息融合算法。通过仿真实验对节点能量消耗的均衡性、网络生存周期及信息融合精度等方面进行性能评估验证该算法的有效性。     

概率布尔网络的动态行为研究

概率布尔网络是布尔网络的拓展。布尔网络和概率布尔网络已经广泛应用于生物系统模拟中。运用马尔科夫链模拟概率布尔网络的动态行为及采用消除趋势波动分析（DFA）方法,分析概率布尔网络的长程相关性特性发现,概率布尔网络的动态行为具有长程相关性,大部分概率布尔网络能呈现1/f波动,且产生1/f波动的噪声值和范围比布尔网络的大。     

基于传感器网络的分布式遗传k-means聚类算法研究

传统的集中式聚类算法不适宜对传感器网络的分布式数据进行聚类,用遗传进化机制对传统k-means的分布式聚类算法进行优化,可得出遗传k-means聚类算法。遗传k-means聚类算法即在传感器网络中sink节点传送随机选取的初始k个簇心到各个传感器节点,在这些节点上分别用遗传k-means聚类算法将本地的数据划分到距离最近的簇,然后将簇信息在无线传感器网络里通过路由逐层上传合并汇聚到sink节点,计算k个簇心的平均值,再往下传送k个簇心,反复迭代更新直至聚类目标函数值达到最小为止。实验表明,遗传k-means聚类算法的聚类效果较好,收敛速度较快。     

浅议中小城市图书馆的信息资源配置

简要分析了图书馆在信息网建设中的重要性,加强图书馆信息配置的重要意义,图书馆信息资源配置严重不足所带来的不利影响.引导人们关注因图书馆信息资源配置严重不足导致图书馆在信息化建设中严重滞后这一根本问题.