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以1900~2013年Web of Science(WOS)收录的动物学(Zoology)为主题的文献为数据源,借助WOS分析功能和CiteSpaceⅡ信息可视化软件,对数据进行共引、聚类以及突变分析,揭示动物学中Zoology主题研究的优势国家和地域,追踪和揭示领域前沿和热点。结果发现:纵深发展形成了动物系统学和保护生物为基础的两个前沿和趋势,形成了"中国"、"新物种"等研究热点,我们应以此为契机,进一步加强与国际的交流合作,将动物进化学和保护生物学有机结合,提出具有创新性及重大影响的新理论,进一步推动我国动物学的前沿领域发展。 相似文献
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首先讨论了中国21世纪林业科技革命新范式,接着分析了促进林业可持续发展的科技创新对策建议、林业重大生态工程、生态安全管理和生物多样性保护领域,最后做了总结。 相似文献
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文章对检索的数据对象进行可视化分析,利用可视化工具绘制情报学领域文献的期刊分布图,揭示了当前国际情报学领域的核心期刊;基于词频统计分析绘制情报学领域热点词汇分布图,展示了情报学领域的研究热点,揭示该领域学术研究的发展脉络与方向,从而为情报学选择研究的切入点和重点、开展更深入的研究提供参考和依据。 相似文献
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利用CiteSpace工具对国内外数据包络分析的相关文献进行了关键词聚类、文献共被引、合作关系等可视化分析,得到了如下研究结论:国内外关于数据包络分析的研究都是从理论研究开始逐渐深化,不同的是国内研究与我国社会的发展趋势基本同步,近期主要是在教育领域研究科研方面的效率;国外研究较为多元化,研究热点从早期的农业领域效率研究到工商业领域评估研究,直至而今的能源环境领域研究,近期主要研究如何调节企业的投入产出,尽可能使其所造成的环境污染最小。此外,本文还研究揭示了研究学者、机构、国家间的合作关系图谱。通过对国内外数据包络分析研究的梳理,有利于读者洞悉数据包络分析研究脉络,为相关研究工作的进一步开展提供参考。 相似文献
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生物多样性大数据资源是国家重要战略资源,也关乎国家生态安全和生态文明建设。中国生物多样性大数据平台将包括基于宏观与微观生物生态数据协同整合的大数据库和大数据深度挖掘与模型模拟运算库,支持生物多样性和生态系统多源数据整合和共享的标准以及数据集成应用的方法,实现古生物化石数据与遗传组学数据、生理与性状数据、物种多样性、生态系统多样性等跨学科数据融合,与地理、气象、遥感、环境、国民经济等跨领域数据整合,形成完整的共享数据集或栅格化图集。利用分析模型和可视化技术实现对多源生物多样性数据集的挖掘和利用,构建开放开源的生物多样性大数据处理利用的通用接口,建立一个以生物多样性和生态安全为核心的包括对海量数据进行有效管理、高效分析和可用易用的综合大数据系统,面向政府部门提供标准化、可视化服务,促进我国生物多样性资源保护和生态安全格局构建,保障国家生态安全,支撑我国生物多样性交叉学科前沿领域科学发现和产业创新发展。 相似文献
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青藏高原是我国重要的生态安全屏障,自然保护区能有效保护区域生物多样性与生态安全。为更好地了解我国青藏高原自然保护区的研究历史与现状,以中国知网（CNKI）为数据源,对1975—2022年收录文献共410篇进行文献检索,运用可视化软件绘制图谱并进行分析。结果发现：（1）青藏高原自然保护区研究历程可分为起步萌芽、探索发展与快速增长三阶段,发文量与国家生态文明建设进程密切相关;（2）在环境科学与资源利用、生物学、林业等学科知识基础上,青藏高原自然保护区的主要研究内容为生态安全与环境保护、生态建设对生物多样性保护的重要性与国家森林建设与自然保护区体系规划研究等;（3）青藏高原自然保护区研究正逐步形成具有代表性的作者群体和研究机构,研究不再局限于西北地区的高校与科研院所,已成为全国科研竞争的热点与战略高地;（4）多手段探究气候变化对保护区的影响、生态系统格局与风险变化评估、保护开发与可持续性利用是当前青藏高原自然保护区的研究热点。 相似文献
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对国际上搜索引擎领域的研究文献进行比较细致、深入的考察,采用可视化方法进行定量分析并制作有关知识图谱,明晰国际搜索引擎研究的总体趋势和发展脉络。通过对高被引文献的深入解读和定性分析,以及近几年相关文献的共词分析,揭示国际上搜索引擎研究的起源和发展,以及从进入快速发展期至今四个阶段的研究热点演进历程。最后,总结和展望国际搜索引擎研究的热点方向。 相似文献
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【目的/意义】本文通过对国外舆情研究文献进行可视化分析,了解国外相关领域研究进展,以期为我国舆 情研究提供参考。【方法/过程】本文以Web of Science数据库近十年舆情研究文献为对象,利用CiteSpace可视化 分析软件,通过作者、机构、国家合作网络来分析国外舆情研究的时空分布,通过关键词聚类视图来阐释近十年 舆情研究热点,通过突变词分析来判断当前研究趋势。【结果/结论】通过文献计量和可视化,发现近十年国外舆 情研究以特殊专题、理论与传播、新方法应用为研究热点,呈现出聚焦国际时政、注重网络媒介、强调大数据分 析三大趋势。 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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《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
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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《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
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献