SCIE、SSCI期刊跨学科现象的定量分析   总被引：3，自引：2，他引：3  

程莹  刘念才 《情报科学》2005,23(2):237-240,263

2002年版的科学引文索引(扩展版)和社会科学引文索引收录的7291种期刊中有43％期刊是同时属于两个或多个学科类别的。本文统计分析了这些期刊跨学科类别和跨学科群，并通过研究交叉期刊定量地揭示了学科之间的联系程度。  相似文献   

脂肪酸合成酶缩合中心的羧负离子结合部位     

田维熙 《中国科学院研究生院学报》1990,(2)

本文对六个修饰巯基的试剂失活脂肪酸合成酶(FAS)的动力学进行了系统研究,发现它们与FAS的作用是否属于亲和标记,修饰巯基时的专一性,以及盐和NADPH有无保护,均只与该试剂分子中有无羧基负离子有关,提出在FAS的缩合中心存在一个对羧负离子有特异亲和力的结合部位.该部位可能是丙二酰基在缩合中心的结合部位,为缩合反应所必需,它使携带了丙二酰基的活臂向缩合中心运动,并结合于此进行缩合反应.  相似文献   

元决策与群决策     

李良  尧俞  郭耀煌  何安涛 《软科学》2001,15(5):6-8,16

文章尝试在群决策中引入元决策思想,群决策的两层结构因此而更加清晰。文章还对群决策中元决策的内容,尤其是群效用集结问题进行了讨论。  相似文献   

高校网络群体性事件舆情演化规律初探——基于多项式拟合的定量分析     

邓春林  杨柳  王涵之 《现代情报》2016,36(5):16-20

高校大学生群体由于文化素质高、思维活跃、关心社会、思想不够成熟等,在网络敏感事件的诱使下容易在网络上形成一些过激语言和行动,从而形成一些大规模的高校网络群体性事件,给社会造成了巨大的影响力。因此,有必要清楚地了解各类高校网络群体性事件网络舆情的演化规律,用定量分析的方法进行科学的论证和预测。本文通过搜集5个典型的高校网络群体事件舆情演化的历史数据,建立了基于多项式拟合的舆情演化规律模型,得到了各类高校网络群体性事件舆情演化的具体规律,为科学预测和及时应对高校网络群体性事件起到一定的借鉴作用。  相似文献   

民营企业集群恶性竞争及集群升级研究——恩平麦克风及电声集群案例   总被引：2，自引：0，他引：2  

林健  范佳凤 《软科学》2007,21(5):131-135

分析了民营企业集群恶性竞争的原因和这些原因存在的根源,并提出了实现民营企业集群升级的构想。  相似文献   

Innovators and imitators: Organizational reference groups and adoption of organizational routines   总被引：3，自引：0，他引：3  

Silvia Massini  Arie Y. Lewin  Henrich R. Greve   《Research Policy》2005,34(10):1550-1569

Firms vary greatly in their rates of creating and adopting technological and organizational innovations, in part because of their choice of reference group. We argue that the selection of a reference group is a crucial and neglected source of firm heterogeneity. Comparisons to the average of other firms in a population cause most firms to adopt innovations once they are widely accepted. A distinctive feature of the minority of innovating firms that create innovations or adopt them early is that they compare themselves with, compete with, and try to differ from other innovating firms, whereas the majority of firms compare themselves with, and conform to, a broader group of firms. We elaborate this argument based on the behavioral theory of the firm and institutional theory, and test it on a two-period survey on adoptions of innovative organizational forms in Europe and the US. The analysis shows the predicted differences in the adoption patterns of innovating and imitating firms.  相似文献   

Quality Talk and dialogic teaching—an examination of a professional development programme on secondary teachers’ facilitation of student talk          下载免费PDF全文

Maree Davies  Katharina Kiemer  Kane Meissel 《British Educational Research Journal》2017,43(5):968-987

This study used the Quality Talk and dialogic teaching approach with a group of secondary school teachers (N = 7) to train their facilitation of dialogical discussions by small groups of students. The study used video and audio analysis to assess the teachers’ observable behaviours during these discussions, before and after professional development; for example, types of Quality Talk questions asked. The study also used face‐to‐face interviews, held before and after the professional development, to investigate the teachers’ beliefs about learning through discussion. Results show that although the number of high‐quality questions from the teachers did not increase, the quality of the questions students asked of each other did improve, and resulted in extended periods of dialogic spells. Positive developments were found for teachers’ beliefs about the use of dialogue to foster deeper thinking with their secondary school‐aged students.  相似文献   

Understanding students’ experiences of professionalism learning: a ‘threshold’ approach     

Hilary Neve  Helen Lloyd  Tracey Collett 《Teaching in Higher Education》2017,22(1):92-108

Professionalism is a core element of curricula in many disciplines but can be difficult to teach and learn. This study used audio-diary methodology to identify professionalism threshold concepts in a small group learning setting in undergraduate medicine and to understand factors that might facilitate students to ‘get’ such concepts. Fifteen students and seven tutors kept audio-diaries over two terms. Data were analysed qualitatively for content. The key themes were then cross referenced to threshold concept criteria (e.g. where language indicated that learning was troublesome, integrative or transformative). Seven potential threshold concepts were identified which centred on students’ developing professional identities including working with uncertainty, considering the bigger picture, not needing to know everything and professional culture. Reflection on workplace experiences within a small group helped students ‘get’ these concepts. The study concludes that threshold concepts and audio-diaries are useful tools for understanding lived experiences of professionalism learning.  相似文献   

学术型研究生培养质量现状与提升对策研究     

姚芳  袁晓玲 《教育教学论坛》2019,(18):237-239

本文总结了我国学术型研究生培养质量特征及主要影响因素,指出培养过程中存在导师遴选机制不合理、学生录取方式不完善、学术活动流于形式、管理制度不健全等问题,造成现阶段学术型研究生培养质量下滑。针对存在问题,本文提出构建"指导有方、教研相长、追求创新、制度健全"的培养模式,具体从完善导师指导、鼓励学生创新、确保教学科研品质、提升管理服务水平等四个方面提升学术型研究生培养质量。  相似文献   

高等几何的群论观点对初等几何的指导作用     

杜家安  刘林安 《安阳师范学院学报》2001,(5):53-55,62

本文从仿射变换，仿射性质、仿射量，仿射对应图形入手，通过实例，分析、探讨高等几何的群论观点对于初等几何的指导作用，在较高层面上认识几何空间的基本特性、研究方法、内在联系、确认几何学的本质，以便更深入地认识和掌握初等几何，指导初等几何的教学与研究，居高临下地认识初等几何的内涵与外延。同时，进一步认识到高等几何不仅在提高观点方面具有独特作用，而且在论证方法，思考问题等方面具有独特的巧妙、灵活等特点。  相似文献