[目的/意义]在新一代信息技术掀起电子化公共服务研究新热潮之际,从历史演化的纵向维度和全球比较的横向维度对国内外研究进行对比分析,有助于推动理论和实践发展。[方法/过程]选取Web of Science数据库中2597篇外文文献以及CNKI数据库...[目的/意义]在新一代信息技术掀起电子化公共服务研究新热潮之际,从历史演化的纵向维度和全球比较的横向维度对国内外研究进行对比分析,有助于推动理论和实践发展。[方法/过程]选取Web of Science数据库中2597篇外文文献以及CNKI数据库中845篇中文文献作为研究对象,运用Cite Space 5.0对突现词、高频关键词、高被引文献等进行处理,绘制相应的知识图谱,对比分析国内外研究的演化阶段、研究热点和知识基础。[结果/结论]研究发现,国内外研究均经历了从关注信息服务、办事服务到关注协同服务三个阶段的演化;国外研究更为关注技术的用户采纳,具有显著的用户导向特点;国内研究更多强调理念引领和政策解读,具有明显的供给驱动特点。国内未来研究应注重制度优势和理论积累。展开更多
We constructed a physical map of O. sativa ssp. japonica cv. ZH11 and compared it and its random sample sequences with the Nipponbare RefSeq derived from the same subspecies. This comparison showed that the two japoni...We constructed a physical map of O. sativa ssp. japonica cv. ZH11 and compared it and its random sample sequences with the Nipponbare RefSeq derived from the same subspecies. This comparison showed that the two japonica genomes were highly syntenic but revealed substantial differences in terms of structural variations, rates of substitutions and indels, and transposable element content. For example, contractions/expansions as large as 450 kb and repeat sequences that were present in high copy numbers only in ZH11 were detected. In tri-alignment regions using the indica variety 93-11 sequence as an outgroup, we found that： （1） the substitution rates of the two japonica-indica inter- subspecies comparison combinations were close but almost a magnitude higher than the substitution rate between the japonica rice varieties ZH11 and Nipponbare; （2） of the substitutions found between ZH11 and Nipponbare, 47.2% occurred in ZH11 and 52.6% in Nipponbare; （3） of the indels found between ZH11 and Nipponbare, the indels that occurred in ZH11 were 15.8 times of those in Nipponbare. Of the indels that occurred in ZH11, 75.67% were insertions and 24.33% deletions. Of the indels that occurred in Nipponbare, 48.23% were insertions and 51.77% were deletions. The ZH11 com- parative map covered four Nipponbare physical gaps, detected assembly errors in the Nipponbare sequence, and was integrated with the FSTs of a large ZH11 T-DNA insertion mutant library. ZH11 BAC clones can be browsed, searched, and obtained at our website, http：//GResource.hzau.edu.cn.展开更多
目的对2007-2016年Web of Science图书情报领域中国作者发表的合作论文进行分析,以期了解图书情报领域国内外合作论文现状和揭示其发展规律。方法检索Web of Science数据库近10年图书情报领域中国作者发表的文献,并将所有文献分为国内...目的对2007-2016年Web of Science图书情报领域中国作者发表的合作论文进行分析,以期了解图书情报领域国内外合作论文现状和揭示其发展规律。方法检索Web of Science数据库近10年图书情报领域中国作者发表的文献,并将所有文献分为国内合作组与国际合作组,综合运用Microsoft Excel软件和UCINET软件,对比分析国内外合作文献的发文量、被引量、刊载期刊和国内外合作文献的研究热点并绘制可视化知识图谱。结果国内外合作文献量均逐年上涨,国内合作文献总量和总被引均高于国际合作文献,但其文献增长率以及篇均被引频次都低于国际合作,国内外合作文献的来源期刊大部分位于1区,但国际合作文献中高影响因子文献占有的比重远高于国内合作文献,文献计量学和社会网络分析是国内合作论文的研究热点,国际合作论文比较侧重知识管理、电子商务和文本挖掘相关研究。结论我国在国际图书情报领域的发展势头强劲,对于国内研究者而言,不应局限于国内合作,应拓宽视野,加强国际合作交流,汲取新知识、获取新思路,有效提高科研生产力和提升学术影响力,实现全球范围的科研融合和知识共享。展开更多
Circular genomes, being the largest proportion of sequenced genomes, play an important role in genome analysis. However, traditional 2D circular map only provides an overview and annotations of genome but does not off...Circular genomes, being the largest proportion of sequenced genomes, play an important role in genome analysis. However, traditional 2D circular map only provides an overview and annotations of genome but does not offer feature-based comparison. For remedying these shortcomings, we developed 3D Genome Tuner,a hybrid of circular map and comparative map tools. Its capability of viewing comparisons between multiple circular maps in a 3D space offers great benefits to the study of comparative genomics. The program is freely available （under an LGPL licence） at http：//sourceforge.net/projects/dgenometuner.展开更多
为全面把握国内外工作旺盛感的研究热点及趋势变化。基于中国知网(2013—2022)与Web of Science(2005—2022)核心数据库相关文献,运用Citespace软件,通过对国内外该领域的学者发文量、核心作者合作、关键词共现、聚类、研究前沿及知识...为全面把握国内外工作旺盛感的研究热点及趋势变化。基于中国知网(2013—2022)与Web of Science(2005—2022)核心数据库相关文献,运用Citespace软件,通过对国内外该领域的学者发文量、核心作者合作、关键词共现、聚类、研究前沿及知识基础等方面进行比较分析。结果发现:在发文量上,2018年后国内外均呈上升趋势;在核心作者合作上,国内外形成小规模的团队,但联系较弱,应加强不同团队间跨域合作;在研究热点和前沿上,国内外具有趋同性,即国内外学者均持续关注旺盛感的前因与积极结果,而差异性在国内学者更关注多元领导风格的影响;在知识基础上,研究内容较为相似。未来国内学者可以从内容的多元化、情境的本土化、视角的层次化及方法的差异化四个方面继续深入探究。展开更多
网络问政是新时代政民互动的一次新探索,是政府问计于民、问需于民、问政于民的新形式,为公民行使权利、参与政治生活提供了新渠道。文章运用知识图谱工具CiteSpace,对Web of Science数据库中的544篇论文和CNKI中的1029篇关于网络问政...网络问政是新时代政民互动的一次新探索,是政府问计于民、问需于民、问政于民的新形式,为公民行使权利、参与政治生活提供了新渠道。文章运用知识图谱工具CiteSpace,对Web of Science数据库中的544篇论文和CNKI中的1029篇关于网络问政研究的论文进行计量分析,梳理国内外网络问政研究的发文情况,通过关键词共现和聚类对比分析网络问政的研究热点和发展趋势。国内外网络问政研究均梳理了三大热点主题,其中主体和媒介研究是二者共同关注的热点,其演化阶段略有不同,但对未来网络问政研究前沿趋势的预测和判断是一致的。基于文献计量分析,为未来学界进一步研究提供参考;结合时事分析,从政府、公民和技术层面为推进网络问政发展、数字政府建设提供了可行性建议。展开更多
文摘[目的/意义]在新一代信息技术掀起电子化公共服务研究新热潮之际,从历史演化的纵向维度和全球比较的横向维度对国内外研究进行对比分析,有助于推动理论和实践发展。[方法/过程]选取Web of Science数据库中2597篇外文文献以及CNKI数据库中845篇中文文献作为研究对象,运用Cite Space 5.0对突现词、高频关键词、高被引文献等进行处理,绘制相应的知识图谱,对比分析国内外研究的演化阶段、研究热点和知识基础。[结果/结论]研究发现,国内外研究均经历了从关注信息服务、办事服务到关注协同服务三个阶段的演化;国外研究更为关注技术的用户采纳,具有显著的用户导向特点;国内研究更多强调理念引领和政策解读,具有明显的供给驱动特点。国内未来研究应注重制度优势和理论积累。
基金This work was supported by a grant from the National Natural Science Foundation of China for International Collaboration，the 111 Project
文摘We constructed a physical map of O. sativa ssp. japonica cv. ZH11 and compared it and its random sample sequences with the Nipponbare RefSeq derived from the same subspecies. This comparison showed that the two japonica genomes were highly syntenic but revealed substantial differences in terms of structural variations, rates of substitutions and indels, and transposable element content. For example, contractions/expansions as large as 450 kb and repeat sequences that were present in high copy numbers only in ZH11 were detected. In tri-alignment regions using the indica variety 93-11 sequence as an outgroup, we found that： （1） the substitution rates of the two japonica-indica inter- subspecies comparison combinations were close but almost a magnitude higher than the substitution rate between the japonica rice varieties ZH11 and Nipponbare; （2） of the substitutions found between ZH11 and Nipponbare, 47.2% occurred in ZH11 and 52.6% in Nipponbare; （3） of the indels found between ZH11 and Nipponbare, the indels that occurred in ZH11 were 15.8 times of those in Nipponbare. Of the indels that occurred in ZH11, 75.67% were insertions and 24.33% deletions. Of the indels that occurred in Nipponbare, 48.23% were insertions and 51.77% were deletions. The ZH11 com- parative map covered four Nipponbare physical gaps, detected assembly errors in the Nipponbare sequence, and was integrated with the FSTs of a large ZH11 T-DNA insertion mutant library. ZH11 BAC clones can be browsed, searched, and obtained at our website, http：//GResource.hzau.edu.cn.
文摘目的对2007-2016年Web of Science图书情报领域中国作者发表的合作论文进行分析,以期了解图书情报领域国内外合作论文现状和揭示其发展规律。方法检索Web of Science数据库近10年图书情报领域中国作者发表的文献,并将所有文献分为国内合作组与国际合作组,综合运用Microsoft Excel软件和UCINET软件,对比分析国内外合作文献的发文量、被引量、刊载期刊和国内外合作文献的研究热点并绘制可视化知识图谱。结果国内外合作文献量均逐年上涨,国内合作文献总量和总被引均高于国际合作文献,但其文献增长率以及篇均被引频次都低于国际合作,国内外合作文献的来源期刊大部分位于1区,但国际合作文献中高影响因子文献占有的比重远高于国内合作文献,文献计量学和社会网络分析是国内合作论文的研究热点,国际合作论文比较侧重知识管理、电子商务和文本挖掘相关研究。结论我国在国际图书情报领域的发展势头强劲,对于国内研究者而言,不应局限于国内合作,应拓宽视野,加强国际合作交流,汲取新知识、获取新思路,有效提高科研生产力和提升学术影响力,实现全球范围的科研融合和知识共享。
基金supported by the National HighTech R&D Program (863 Program) of China (Grant No. 2006AA02A301) awarded to XZ
文摘Circular genomes, being the largest proportion of sequenced genomes, play an important role in genome analysis. However, traditional 2D circular map only provides an overview and annotations of genome but does not offer feature-based comparison. For remedying these shortcomings, we developed 3D Genome Tuner,a hybrid of circular map and comparative map tools. Its capability of viewing comparisons between multiple circular maps in a 3D space offers great benefits to the study of comparative genomics. The program is freely available （under an LGPL licence） at http：//sourceforge.net/projects/dgenometuner.
文摘为全面把握国内外工作旺盛感的研究热点及趋势变化。基于中国知网(2013—2022)与Web of Science(2005—2022)核心数据库相关文献,运用Citespace软件,通过对国内外该领域的学者发文量、核心作者合作、关键词共现、聚类、研究前沿及知识基础等方面进行比较分析。结果发现:在发文量上,2018年后国内外均呈上升趋势;在核心作者合作上,国内外形成小规模的团队,但联系较弱,应加强不同团队间跨域合作;在研究热点和前沿上,国内外具有趋同性,即国内外学者均持续关注旺盛感的前因与积极结果,而差异性在国内学者更关注多元领导风格的影响;在知识基础上,研究内容较为相似。未来国内学者可以从内容的多元化、情境的本土化、视角的层次化及方法的差异化四个方面继续深入探究。
文摘网络问政是新时代政民互动的一次新探索,是政府问计于民、问需于民、问政于民的新形式,为公民行使权利、参与政治生活提供了新渠道。文章运用知识图谱工具CiteSpace,对Web of Science数据库中的544篇论文和CNKI中的1029篇关于网络问政研究的论文进行计量分析,梳理国内外网络问政研究的发文情况,通过关键词共现和聚类对比分析网络问政的研究热点和发展趋势。国内外网络问政研究均梳理了三大热点主题,其中主体和媒介研究是二者共同关注的热点,其演化阶段略有不同,但对未来网络问政研究前沿趋势的预测和判断是一致的。基于文献计量分析,为未来学界进一步研究提供参考;结合时事分析,从政府、公民和技术层面为推进网络问政发展、数字政府建设提供了可行性建议。
