丹参根中丹参酮ⅡA及丹参素分布规律研究

为探索丹参根中有效成份的分布规律,将丹参根的皮部与木质部分离后采用高效液相色谱法分别测定其中有效成分的含量,结果显示丹参根皮部丹参素含量为1.65%,丹参酮ⅡA含量为0.34%;木质部丹参素含量为1.26%,丹参酮ⅡA含量为0.056%.因此可以确定丹参根中有效成份主要分布在皮部.     

基于CiteSpace的众包创新研究知识图谱分析

通过检索Web of Science中有关众包创新的论文,利用知识图谱对该领域的研究现状、发展趋势和当前研究热点进行分析。研究结果表明：(1)以美国为首的西方发达国家是众包创新领域的主要引领国家。我国研究起步稍晚,研究成果数量领先,但高质量文献缺乏;(2)众包创新的研究对象逐渐由众包创新内涵向企业商业模式创新,再向线上众包平台知识交互转变,研究方法从经典的案例分析方法向实证研究转换;(3)众包创新现阶段研究热点方向主要包括众包与开放式创新、众包创新绩效、众包创新社区平台等。     

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。     

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.     

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．     

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.     

新农村建设的政治经济学思考

本文围绕社会主义新农村建设,从政治经济学角度提出了四个基本观点:农民是社会主义新农村建设的主体,政府政策作为农村建设的外部条件,需要通过农民这个内因起作用;新农村建设走社会主义道路必须以合作经济为基础,小农经济和集体经济都承担不了这一重任;新农村建设的主要任务不仅要发展农业,以工业反哺农业,而且要发展工业,并且以工业改造农业;社会主义新农村建设的起点是乡村文明,终点应是城镇文明,即使是人文乡村图景亦难掩盖亿万农民对城市文明的现代诉求。     

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.