基于知识图谱的国内石墨烯研究分析与发展对策

以SCIE数据库中1994-2012年我国的石墨烯论文为研究对象,借助SCIE分析功能和信息可视化软件CiteSpace,对石墨烯文献进行计量和可视化分析。通过绘制知识图谱,展示了我国石墨烯研究的时间分布、空间分布、研究力量分布和主要研究领域,揭示了石墨烯的研究热点与应用领域,并就石墨烯研究的发展提出对策建议。     

两种用于城市用水量预测的灰色-神经网络组合模型

为了提高灰色GM(1,1)模型在城市用水量预测中的精度,结合BP神经网络的优点,给出了两种灰色-神经网络组合模型GM-BP1和GM-BP2.模型1利用神经网络对GM(1,1)模型的误差序列进行回归训练,将得到的预测值作为原始误差的修正来减小误差;而模型2由部分数据建立了GM(1,1)模型组,通过神经网络训练得到部分数据GM(1,1)模型组与真实值之间的非线性映射关系,利用这种精准的映射关系来提高预测精度.最后实际算例表明了所给方法是有效的,该组合模型可用于城市用水量的中长期预测.     

弱序列连续的半闭1-集压缩映射的新不动点

利用弱序列连续的半闭1-集压缩映射的非线性二择一性质,得到了Banach空间中弱序列连续的半闭1-集压缩映射的若干新不动点定理,从而将著名的Altman定理、Roth定理和Petryshyn定理由压缩映射推广到弱序列连续的半闭1-集压缩映射的情形.     

Evaluating effects of atmospheric CO2 on stability of global climate: a cell-to-cell mapping approach

Atmospheric carbon dioxide concentration [CO2], incoming solar radiation and sea ice coverage are among the most important factors that control the global climate. By applying the simple cell-to-cell mapping technique to a simplified atmosphere-ocean-sea ice feedback climate model, effects of these factors on the stability of the climatic system are studied. The current climatic system is found to be stable but highly nonlinear. The resiliency of stability increases with [CO2] to a summit when [CO2] reaches 290 μL/L which is comparable to the pre-industrial level, suggesting carbon dioxide is essential to the stability of the global climate. With [CO2] rising further, the global climate stability decreases, the mean ocean temperature goes up and the sea ice coverage shrinks in the polar region. When the incoming solar radiation is intensified, the ice coverage gradually diminishes, but the mean ocean temperature remains relatively constant. Overall, our analysis suggests that at the current levels of three external factors the stability of global climate is highly resilient. However, there exists a possibility of extreme states of climate, such as a snow-ball earth and an ice-free earth.     

基于CSSCI的我国自闭症研究知识图谱分析

以CSSCI数据库中1998—2013年间收录的自闭症研究的237篇文献为原始数据,应用可视化软件CiteSpace Ⅱ绘制国内自闭症研究的知识结构图谱与发展进程图谱,挖掘自闭症领域的代表人物和经典文献,描绘自闭症研究在不同时期的热点问题与知识基础。结果显示：我国自闭症领域的研究主要包括理论探讨和教育干预两大分支,涵盖了心理理论、个案研究、体育游戏、早期干预、行为治疗和应用行为分析等多方面内容。     

拓扑空间中的截口定理及其应用

将KyFan截口定理推广到具有性质（H）的拓扑空间．作为应用,在具有性质（H）的拓扑空间上进一步推广了Browder不动点定理,并利用所得结果在具有性质（H）的拓扑空间中证明了极大极小不等式定理和鞍点定理．     

我国公共体育服务研究的计量学分析*

以中文社会科学引文索引CSSCI成立至今所收录的研究主题为公共体育和体育公共服务的246篇文献为数据来源,并结合CNKI对246篇文献进行检索下载,采用CiteSpaceⅤ进行可视化处理与计量学分析。运用知识图谱的方式对公共体育和体育公共服务研究领域文献的年度数量、机构分布、作者团队、期刊来源、热点共现及演进过程进行探测。研究表明,公共体育和体育公共服务研究文献数量逐年上升,研究多分布于江浙沪地区与长江流域;研究形成了以不同机构为单位的研究团队并掌握着这一科学领域的研究方向;收录期刊来源中,体育类期刊占绝对优势,其中上海体育学院学报载文最多;研究热点前沿与演进围绕着公共体育和体育公共服务的构建与完善展开,由公共体育和体育公共服务的理论研究逐渐过渡到应用研究,从公共体育和体育公共服务的纯理论概念研究向着服务体系、服务均等化、服务供给等应用型研究发展,并形成了以政府购买公共体育和体育公共服务与政府管理为代表的研究实践。     

基于多系数保角变换法的船舶垂荡纵摇运动仿真

为给航海模拟器建立实用可靠的船舶在波浪中运动的数学模型,基于二维线性势流理论,采用多系数保角变换法对每个船舶横剖面进行高精度拟合,计算各个横剖面的水动力系数和波浪激励力,利用Visual Studio自主开发出船舶在规则波中的纵向运动数值模拟程序。为验证这个数值模拟程序的可靠性,对S175集装箱船在迎浪中运动的幅值响应因子(response amplitude operator, RAO)进行数值计算。结果表明:当弗劳德数为0.275时,RAO计算结果在大部分频率范围内与试验结果吻合良好。因此,这个数值模拟程序能准确地对船舶在波浪中的运动时历进行仿真。     

Mapping cultural assets and evaluating significance: theory,methodology and practice

Over the last decade in the UK, there has been a notable shift in the popularity and use of cultural mapping as a methodology for policy making at a regional and local level. This follows increased demand for an informed framework for planning arts and cultural facilities from local and regional government and from within the cultural sector (Evans, 2008: p. 65). The article begins with an exploration of cultural mapping within cultural policy, which explores the context for the growth in this area of activity, and why this kind of activity appeals to policy makers and organisations. It then goes on to examine four cultural mapping exercises which have been undertaken in recent years in the UK. These studies have been chosen because although they all focus the mapping of cultural assets within a specific geographic area, they differ to one degree or another in purpose, context, definition, geographic scale and methodology. They illustrate the narrow range of approaches deployed in the cultural mapping field in the UK, and as such provide a useful means of critically reviewing their limits as well as highlighting the issues and challenges faced by cultural cartography in practice. The article concludes by considering the type of mapping research that is “allowed” within the discursive confines of consultancy based cultural policy research.     

Complete graphs and bibliographic coupling: A test of the applicability of bibliographic coupling for the identification of cognitive cores on the field level

The method of bibliographic coupling in combination with the complete link cluster method was applied for mapping of the field of organic chemistry with the purpose of testing the applicability of a proposed mapping method on the field level. The method put forward aimed at the generation of cognitive cores of documents, so-called ‘bibliographic cliques’ in the network of bibliographically coupled research articles. The defining feature of these cliques is that they can be considered complete graphs where each bibliographic coupling link ties an unordered pair of documents. In this way, it was presumed that coherent groups of documents in the research front would be found and that these groups would be intellectually coherent as well. Statistical analysis and subject specialist evaluations confirmed these presumptions. The study also elaborates on the choice of observation period and the application of thresholds in relation to the size of document populations.