共查询到20条相似文献，搜索用时 640 毫秒
1.
【目的/意义】利用网络分析方法对融入引文内容的引文网络中的知识流动规律与模式展开系统研究,以期
为引文网络中的知识扩散、转化与创新提供理论与实证依据。【方法/过程】选取描述性统计量和网络分析指标,对
知识节点的知识流动能力及角色、知识群落的知识流动类型及结构、整体网络的知识流动分布特征及结构特征进
行深度刻画和剖析。【结果/结论】依据CNKI数据库主题期刊论文为测度数据,分别构建“智库”“数字人文”“数据治
理”三个主题的引文网络,并依据文中方法比较分析其间知识流动特征的异同。文中方法能够深入挖掘学术文献
间的知识关联,弥补过去引文网络知识流动研究中因忽略深层次引用信息而产生的缺陷。【创新/局限】本文采用多
种指标与方法对引文内容视角下引文网络知识流动规律与模式展开系统研究,但是未从整体引文网络中抽取反映
某一或某些知识属性的个体引文网络进行分析。 相似文献
2.
3.
基于社会网络分析法的组织知识网络及其优化 总被引：8，自引：2，他引：6
组织内的知识流呈现网状结构,这一结构的形成与知识在组织中转移和扩散的社会属性息息相关.社会网络分析(Social Network Analysis,简称SNA)通过量化描述和度量知识网络以发现组织内知识流动中存在的问题.将SNA引入组织知识网络研究,分别从"自我中心社会网"和"整体社会网"的角度,以某企业研发团队的知识网络为实例,对组织内部知识网络的相关问题进行探讨,包括确认节点的知识交流关系、测度节点间知识交流强度,识别知识团体和关键知识节点等.在此基础上提出组织知识网络优化的原则及方法,并在实践中通过相应措施,实现了对组织知识网络的量化测评和结构优化. 相似文献
4.
【目的】梳理并分析期刊间知识扩散模式和研究应用,以促进期刊全方位发展,并为期刊定位及规划发展策略制定提供新的角度。【方法】通过文献调研和内容分析,对国内外期刊间知识扩散相关文献进行提炼总结,系统分析期刊间知识扩散路径模式以及相应的测度指标。【结果】在明确知识扩散相关概念的基础上,从扩散路径、测度指标和相关应用等方面对期刊间知识扩散相关研究进行述评,归纳扩散过程中的内在演化路径及规律。【结论】未来可考虑在已有理论基础上借鉴多学科理论方法和构建多层网络的融合分析,进一步考虑多维影响机制来优化知识扩散模型,同时关注引文内容对扩散程度的影响,优化改进现有指标以全面衡量扩散现象。 相似文献
5.
知识链接是知识服务的基础,基于引文网络的知识链接能够把具有引文关系的文献聚合形成知识网络.分析引文与引文网络的概念和分类,阐述了基于引文的知识链接的含义和特征,最后提出基于引文网络的知识链接框架模型. 相似文献
6.
比较了文献引文和网络链接的特点，从引文数量和引文类型两个方面对文献引文和网络引文进行比较，最后从假设前提、指标和工具三个方面对文献引文分析、网络链接分析和网络引文分析进行比较。 相似文献
7.
8.
9.
【目的/意义】从引文内容视角探究引文网络的拓扑结构及其组成要素的知识属性与引文网络中知识流动
效应间的关系。【方法/过程】首先,在阐述引文内容视角下引文网络知识流动主要特征的基础上,从静态特征属性
和动态结构属性2个方面构建了知识流动的演化动力模型;然后,依据影响引文网络中知识流动效应的主要因素,
从知识吸收效应、知识叠加效应和知识成本效应3个方面构建了知识流动效应函数的数学模型;最后,借鉴描述知
识溢出效应的蜂巢模型及其修正模型提出了知识流动效应系数的计算方法。【结果/结论】运用Netlogo设置演化动
力模型的初始参数,并通过仿真实验剖析各因素对知识流动效应系数的影响机理。文中方法可为客观反映引文网
络中的知识流动规律与模式,并揭示引文网络中的知识流动效应提供一套可参考的实证模型。【创新/局限】本文通
过计算实验方法从理论上较为系统地分析了引文内容视角下引文网络的知识流动效应,得出了一系列结论,但并
未结合实际题录数据的计算结果进行对比和优化。 相似文献
10.
城市网络激发技术创新的机理及证据 总被引：1，自引：0，他引：1
城市相对于乡村的诸多优势使其成为创新中心,城市间联系的网络化趋势对创新网络形成、创新主体间知识流动及创新扩散模式与效率产生影响,有利于激发城市技术创新。依据中国城市之间的航空流数据,利用复杂社会网络分析法,测度城市网络的整体特征及个体特征,进而考察城市网络对技术创新的实际影响效应。结果显示:城市网络绝对密度扩大及城市间关联度的增强推动技术创新水平的提升,城市间强联结影响知识流动并促进技术创新;网络中心性水平决定着城市间连接的分布,影响网络内创新扩散和知识流动的潜力;度中心性高的城市具有更高的创新潜力和创新绩效,介中心性高的城市节点拥有对知识和创新成果扩散的较强控制力。结论对于明晰网络时代的城市发展动力及方向、提升城市创新能力具有启示意义。 相似文献
11.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
12.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
13.
Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献
14.
《中国科学院院刊(英文版)》2014,(3):212-213
<正>In February 2014,the 30th Chinese Antarctic inland expedition team reported that they have successfully conducted the seeing measurement at the Antarctic Taishan Station using a Differential Image Motion Monitor(DIMM)developed by the Nanjing Institute of Astronomical Optic and Technology(NIAOT),Chinese Academy of Sciences.In astronomy,seeing is a physical parameter that describes the irregular movement and blur of the star 相似文献
15.
XIN Ling 《中国科学院院刊(英文版)》2014,(4):270-271
Amassive overhaul is coming to the Chinese Academy of Sciences （CAS）. To straighten its ＂fragmented, inefficient research＂, the academy has decided to restructure its 104 institutes for better teamwork. 相似文献
16.
SONG Jianlan 《中国科学院院刊(英文版)》2014,(4)
<正>DNA demethylation in mammalian zygotes,a biochemical process through which the parental genomes let go the epigenetic marks from their"past lives"to obtain totipotency,has long fascinated biologists:how does it happen?A joint team at the CAS Shanghai Institutes for Biological Sciences tells a surprising story. 相似文献
17.
China is one of the fastest growing economies worldwide. Are science and research also in the fast lane? We talked with LUO Yuan, scientist at the Institute of Coal Chemistry in Shanxi, and Axel Mosig, Professor at Ruhr University in Bochum, who has first-hand experience working and living in China. 相似文献
18.
Joachim Trümper 《中国科学院院刊(英文版)》2014,(2):201-201
<正>"In 1979 two Chinese scientists joined our institute in the framework of the historical CAS-MPG agreement.This marked the beginning of a longstanding fruitful collaboration.Many visitors followed and contributed to our scientific programs.–My first visit to China took place in 1981–with stays at CAS institutes in Bejing,Nanjing,Shanghai and Kunming,where I received unforgettable impressions of 相似文献
19.
《中国科学院院刊(英文版)》2014,(3)
<正>May 15,2014Publicly funded scientific research is an important means for the society to create knowledge,support innovation,and promote growth.Research articles from such research are knowledge resources to be shared by all.Their open access will facilitate the dissemination and utilization of knowledge,turn the knowledge produced by public investment effectively into innovation and development capabilities of the society,ensure that public knowledge benefi ts all,and strengthen the innovation driven development strategy.Therefore,Chinese Academy of Sciences(CAS)issues at the present stage the following open access policy for articles from publicly funded scientifi c research projects:CAS requires its researchers and graduate students to 相似文献
20.
《中国科学院院刊(英文版)》2014,(3)
<正>Between February and March of 2013,the source of avian-origin H7N9 human infection was discovered in Shanghai and Anhui,China.Prior to this,H7N9 has only exhibited characteristics of a low pathogenic avian infl uenza virus,carried by chickens with no known cross-species transmission.By the end of August 2013,Chinese mainland reported a total of 134 confi rmed cases of H7N9 human infections across12 provinces and 42 cities,resulting in 45 deaths.In October and November,Zhejiang Province found three new cases and Guangdong found one case of human infection,suggesting the possibility of a comeback in the fall and winter seasons.Researchers led by Prof.GAO Fu(George Fu Gao)at the Institute of Microbiology,CAS and Beijing Institutes of Life Science,have made progress on understanding 相似文献