我国反竞争情报研究论文的可视化分析——基于1998-2010年的引文分析     

许诺  邓金堂  朱玥 《情报科学》2012,(5):725-730

采用引文分析法从引文量、高影响力期刊、被引论文、权威机构等方面对12年来CCD收录的反竞争情报论文进行统计分析,运用多元分析法和社会网络分析法对核心作者进行共被引分析,并绘制可视化图谱,展现该领域作者间合作关系与强度,最后指出该领域取得成绩与不足,以期为国内反竞争情报研究提供参考依据。  相似文献   

国际科学合作领域主流学术团体与代表人物分析     

侯剑华 《现代情报》2012,32(1):84-91

在美国ISI的Web of Science网络平台检索数据库中,以Topic= (″Scien* collaborat *″or″Scien* cooperat *″or″research collaborat*″or″research cooperat *″)为检索式进行检索,对下载的文献数据进行信息可视化分析。基于作者共被引分析方法,使用CiteSpace可视化软件绘制作者共被引网络科学知识图谱,探测科学合作领域研究中的主流学术团体和代表人物。国际科学合作研究领域的代表性人物主要有Newman M.,Katz J.,Glanzel W.,Barabasi A.,Beaver D.,Luukkonen T.,Narin F.,Watts D.,Albert R.,Price D. 等。主流学术团体主要包括:以Beaver D.,Luukkonen T. 等为代表的科学合作基础理论和应用研究;以Newman M.,Barabasi A. 等为代表的科学合作网络研究;以Bozeman B.,Etzkowitz H. 为代表的科学产出绩效研究;以Merton R. 等为代表的科学社会学问题研究等。  相似文献   

混合动力大巴车节能减排的全生命周期评价     

郭小琪 《大众科技》2012,(5):228-230

由于频繁的起动和停车,混合动力城市公交车相比传统的柴油车可以大大的节省燃油消耗(最高可达35%),减少对大气的CO2排放约40%～50%.。混合动力城市公交车对环境的影响主要来自于燃油或天然气的使用以及行驶过程中的CO2的排放,但其生产过程中原材料的使用以及报废后的回收同样也影响环境。利用LCA(全生命周期评价)的方法,以沃尔沃混合动力公交车为例,对其从生产、使用、维护以及报废整个全生命过程中能源和原材料的消耗和废物的排放经进行分析,对照传统的柴油车评价其对环境的影响并提出改进建议。  相似文献   

替代性世界：学习环境新方向     

Bebo White  庄秀丽  康文霞 《现代远程教育研究》2010,(5):50-54

教育领域一直以评价和采用交互创新技术为先驱,这些交互创新技术为教育技术专家探索计算机辅助的教学提供了实践的土壤＂。替代性世界＂（Alternative worlds）是完全实时的、高保真的、用户高度介入的学习环境。其特点是具有丰富的环境、丰富的接口、操作驱动和有效应用于教与学＂。替代性世界＂在混合式学习中可以冲破传统教育屏障,拓展教师和学习者角色,为学习者提供时间和空间的便利,实现终身学习＂。替代性世界＂学习环境是一个新的研究领域,它为专注于人机交互、社会网络和虚拟现实的教育技术专家开拓了新方向和新空间。  相似文献   

A facile approach to construct hybrid multi-shell calcium phosphate gene particles     

Zhi-xue Xu  Ran Zhang  You-xiang Wang  Qiao-ling Hu 《Journal of Zhejiang University. Science. B》2010,11(4):292-297

The calcium phosphate (CaP) particles have attracted much attention in gene therapy. How to construct stable gene particles was the determining factor. In this study,hybrid multi-shell CaP gene particles were successfully constructed. First,CaP nanoparticles served as a core and were coated with DNA for colloidal stabilization. The ξ-potential of DNA-coated CaP nanoparticles was -15 mV. Then polyethylenimine (PEI) was added and adsorbed outside of the DNA layer due to the electrostatic attraction. The ξ-pot...  相似文献   

复合图书馆期刊服务探析   总被引：1，自引：0，他引：1  

李兰 《江西图书馆学刊》2006,36(2):66-67

随着文献载体形式的发展和传递方式的改变,一个集传统与现代、静态与动态相结合的复合图书馆正向我们走来。从现实工作出发,分析了处于转型期复合图书馆期刊工作的特点与存在的问题,提出期刊服务模式的创新思路。  相似文献   

作者混合共引网络对知识图谱绘制的改进研究     

黄文彬  蒙汪阳  步一 《图书情报工作》2017,61(3):118-124

[目的/意义]作者共引网络分析（ACNA）是文献计量学中的重要分析方法,旨在通过寻找学术文献集合中作者之间的共引关系绘制出特定领域的知识图谱,进而指导科学研究。然而,ACNA的一个缺陷是其原始矩阵输入信息量过小。本文通过提出作者混合共引网络（HACNA）,绘制更为精确的科学知识图谱。[方法/过程]鉴于不同种类的学术网络能为绘制知识图谱提供不同维度的信息,提高知识图谱绘制的精确性,本文以合著网络和引用网络为例,结合其他种类的学术网络在ACNA基础上进行精确科学知识图谱的绘制。[结果/结论]实证研究结果显示,与ACNA相比,HACNA绘制出的知识图谱在聚类过程中能够使得同类作者更为聚拢、不同类作者更为分散,从而提高了聚类效果和可视化程度。同时,HACNA绘制出的知识图谱还能够挖掘出更多细节。  相似文献   

知识域可视化中的共被引与耦合研究综述     

陶颖  周莉  宋艳辉 《图书情报工作》2017,61(11):140-148

[目的/意义] 知识域可视化是信息可视化衍生出的一个重要分支。基于图书情报学、科学学的研究方法,对知识域可视化研究成果中的共被引与耦合进行全面梳理,分析共被引与耦合在知识域可视化方法中的具体应用,总结知识域可视化的共被引与耦合新发展,引导和推动知识域可视化研究的深入开展。[方法/过程] 在界定知识域、知识域可视化和构建知识域可视化研究框架的基础上,对知识域可视化方法的共被引与耦合进行了归纳和总结,分析了文献共被引方法、作者共被引、期刊共被引、文献耦合方法、作者耦合方法这5种主要的共被引与耦合方法。[结果/结论] 认为以上5种方法是知识域可视化研究的主要方法,而多元引用方法、融合替代计量学的共被引与耦合代表了知识域可视化的新发展。  相似文献   

What makes learners a good fit for hybrid learning? Learning competences as predictors of experience and satisfaction in hybrid learning space     

Jun Xiao  Hong-Zheng Sun-Lin  Tzu-Han Lin  Mengyuan Li  Zhimin Pan  Hsu-Chen Cheng 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):1203-1219

Compared with fully face-to-face or online learning environments, implementation of hybrid learning spaces is costly given the spaces making all learning options available for learners. Therefore, decisions on investments in hybrid learning are critical for institutions. Satisfaction and experience of learners is one of the important indicators for assessing the cost-effectiveness of learning space implementation; thus, predictions of learners' satisfaction and experience can inform institutions' decision making on learning space investments. Moreover, learning competences are found correlated with learners' satisfaction and experience in general and e-learning settings. Therefore, the present study aimed at exploring predictive learning competences for hybrid learners' experience and satisfaction. A hybrid learning space was built upon a proposed model at Shanghai Open University. 211 students’ learning competences and their satisfaction and experience in the hybrid learning space were examined. The results showed that except cognitive engagement competence, most predictive competences were not significantly associated with hybrid learners' satisfaction and experience. The findings indicated that since hybrid learning keeps all options available, to experience satisfying learning, students need not have certain competences but cognitive engagement competence, which is correlated with learners' cognitive ability to figure out the right mix of learning options.  相似文献   

Towards all-author co-citation analysis   总被引：3，自引：0，他引：3  

Dangzhi Zhao   《Information processing & management》2006,42(6):1578

The present study examines one of the fundamental aspects of author co-citation analysis (ACA): the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting: on the one hand, the traditional type that only counts the first one among a cited work’s authors, and on the other hand, a simplified approach to all-author co-citation counting that takes into account the first five authors of a cited work. Results indicate that the picture produced through this simplified all-author co-citation counting contains author groups that are more coherent, and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed. Variations of counting more than first authors are compared.  相似文献