China's manned spaceflight missions have been introduced briefly,and the research planning of space sciences for China's Space Station(CSS) has been presented with the topics in the research areas,including:li...China's manned spaceflight missions have been introduced briefly,and the research planning of space sciences for China's Space Station(CSS) has been presented with the topics in the research areas,including:life science and biotechnology,microgravity fluid physics and combustion science,space material science,fundamental physics,space astronomy and astrophysics,earth sciences and application,space physics and space environment,experiments of new space technology.The research facilities,experiment racks,and supporting system planned in CSS have been described,including:multifunctional optical facility,research facility of quantum and optic transmission,and a dozen of research racks for space sciences in pressurized module,etc.In the next decade,significant breakthroughs in space science and utilization will hopefully be achieved,and great contributions will be made to satisfy the need of the social development and people's daily life.展开更多
With the intensifying urbanization and the increasing demands for land resources, urban development is gradually expanding into the underground. Rational development and design of underground space can not only improv...With the intensifying urbanization and the increasing demands for land resources, urban development is gradually expanding into the underground. Rational development and design of underground space can not only improve use efficiency of land, relieve land use pressure, but also facilitate people's living and improve urban environment. Analysis of the status quo and problems of underground space design researches in China, and the directions of future underground space research and development will contribute to the development and design of underground space. On the basis of reviewing research papers in the past decades, the contents of underground space researches were divided into 10 major categories, the current contents of underground space researches in China and existing problems were analyzed, and it was proposed that the future underground space design researches should be based on traditional research contents and methods, use advanced technologies such as information technology, show the interdisciplinary cooperation, pay attention to human feelings, protection and continuation of cultural context, and adhere to green and sustainable development with consistent innovation and progress.展开更多
目的分析近20年老年人生活空间研究现状、研究热点及前沿。方法以“老年人和生活空间”为主题,系统检索2000年1月1日-2023年6月30日Web of Science核心合集数据库发表的有关老年人生活空间的相关文献,使用CiteSpace 6.1.R6软件对文献的...目的分析近20年老年人生活空间研究现状、研究热点及前沿。方法以“老年人和生活空间”为主题,系统检索2000年1月1日-2023年6月30日Web of Science核心合集数据库发表的有关老年人生活空间的相关文献,使用CiteSpace 6.1.R6软件对文献的发表时间、作者、国家、机构和关键词进行可视化分析。结果最终共纳入291篇文献,整体发文量呈上升态势;发文量最多的国家是美国;发文量最多的机构是Univ Jyvaskyla(于韦斯屈莱大学);研究热点主要集中在老年人生活空间流行病学调查、生活空间的评估、老年人生活空间受限的相关影响因素及不良结局。结论近年来老年人的生活空间问题受到持续关注,我国未来应加强与国外在生活空间研究领域的合作与交流,提高我国该领域的研究水平。展开更多
为进一步了解国内2014—2023年智慧体育领域的总体研究进展,以中国知网(CNKI)核心数据库作为数据来源,利用Cite Space 6.2R6软件绘制出了作者、科研机构、关键词聚类和突现等知识图谱,对国内2014—2023年智慧体育进行可视化分析,对智慧...为进一步了解国内2014—2023年智慧体育领域的总体研究进展,以中国知网(CNKI)核心数据库作为数据来源,利用Cite Space 6.2R6软件绘制出了作者、科研机构、关键词聚类和突现等知识图谱,对国内2014—2023年智慧体育进行可视化分析,对智慧体育研究动态及研究热点加以梳理,探讨发展趋势。研究显示,(1)2021年以来智慧体育的研究得到了越来越多学者的重视,发文数量骤增,开启了智慧体育研究的新篇章;(2)发文作者较多,但该领域核心作者群较少,合作关系不够密切;(3)研究机构以体育类院校为主、师范类与综合类院校为辅;(4)研究热点聚焦于体育产业高质量发展、智慧科技助力竞技体育、全民健身智慧化发展。展开更多
Free field to Eardrum Thansfer Function (FETF) is one of the major factors influencing the identification of the sound source direction. FETF can be employed to generate a Virtual Acoustic Space (VAS) by computer and ...Free field to Eardrum Thansfer Function (FETF) is one of the major factors influencing the identification of the sound source direction. FETF can be employed to generate a Virtual Acoustic Space (VAS) by computer and other equlpment. In this paper the methods to improve the measurement and estimation of FETF are approached. Least-mean-squares (LMS)method is much better than empirical FFT method. This paper also gives a sample description of excitation signals for measuring the impulse response of FETF.展开更多
生态安全是国家安全和生态文明建设的重要组成部分,生态安全评价是生态安全管理的有效工具。以“Web of Science”核心集检索的“生态安全评价”文献为样本,采用Cite Space可视化工具分析近年来国内外生态安全评价研究状况。结果表明:(1...生态安全是国家安全和生态文明建设的重要组成部分,生态安全评价是生态安全管理的有效工具。以“Web of Science”核心集检索的“生态安全评价”文献为样本,采用Cite Space可视化工具分析近年来国内外生态安全评价研究状况。结果表明:(1)生态安全评价研究正处于爆发式增长阶段,过去12年间发表文献量年均增长率达到18.2%,近3年发文量超过总发文量的50%;(2)生态安全评价研究的高产研究机构和作者均在中国,在排名前20位的研究机构和第一作者中占比达到90%;(3)环境科学类期刊是生态安全评价研究信息传播的最主要平台,在载文量前30位的期刊中载文比例超过50%;(4)生态安全评价的研究对象广泛,研究内容丰富,具有以人与自然关系为核心和服务经济社会可持续发展为目标的特点;(5)生态安全评价方法研究主要集中在评价指标筛选优化和评价模型改进与创新方面。根据当前生态安全评价研究中存在的不足,提出了深化生态安全的内涵挖掘、优化评价指标体系、改进创新评价模型、加强国际合作与交流等建议。展开更多
With the complete success of the 2nd stage of Chinese Manned Space Program(CMSP),several science researches have been performed on Tiangong-1 experimental spacelab, which was docked with three Shenzhou spaceships one ...With the complete success of the 2nd stage of Chinese Manned Space Program(CMSP),several science researches have been performed on Tiangong-1 experimental spacelab, which was docked with three Shenzhou spaceships one after another. The China's real spacelab, Tiangong-2 will be launched in 2015, docked with a Shenzhou spaceship soon. After six months, it will be docked with the first Chinese cargo ship(Tianzhou-1). More space science researches, involving with space biology, fluid physics, fundamental physics, materials science, Earth science, astronomy and space environmental science, will be operated on Tiangong-2 spacelab, and crewed and cargo spaceships. Furthermore, the considerable large-scale space utilization of Shina's Space Station is planned. The research fields include yet not limited to space medicine and physiology, space life science and biotechnology, fluid physics and combustion in microgravity, space material science,and fundamental physics in microgravity, space astronomy, Earth science, space physics and space environment utilization, technology demonstration.展开更多
文摘China's manned spaceflight missions have been introduced briefly,and the research planning of space sciences for China's Space Station(CSS) has been presented with the topics in the research areas,including:life science and biotechnology,microgravity fluid physics and combustion science,space material science,fundamental physics,space astronomy and astrophysics,earth sciences and application,space physics and space environment,experiments of new space technology.The research facilities,experiment racks,and supporting system planned in CSS have been described,including:multifunctional optical facility,research facility of quantum and optic transmission,and a dozen of research racks for space sciences in pressurized module,etc.In the next decade,significant breakthroughs in space science and utilization will hopefully be achieved,and great contributions will be made to satisfy the need of the social development and people's daily life.
基金Sponsored by Sichuan Provincial Science and Technology Support Program(2015SZ0232)
文摘With the intensifying urbanization and the increasing demands for land resources, urban development is gradually expanding into the underground. Rational development and design of underground space can not only improve use efficiency of land, relieve land use pressure, but also facilitate people's living and improve urban environment. Analysis of the status quo and problems of underground space design researches in China, and the directions of future underground space research and development will contribute to the development and design of underground space. On the basis of reviewing research papers in the past decades, the contents of underground space researches were divided into 10 major categories, the current contents of underground space researches in China and existing problems were analyzed, and it was proposed that the future underground space design researches should be based on traditional research contents and methods, use advanced technologies such as information technology, show the interdisciplinary cooperation, pay attention to human feelings, protection and continuation of cultural context, and adhere to green and sustainable development with consistent innovation and progress.
文摘目的分析近20年老年人生活空间研究现状、研究热点及前沿。方法以“老年人和生活空间”为主题,系统检索2000年1月1日-2023年6月30日Web of Science核心合集数据库发表的有关老年人生活空间的相关文献,使用CiteSpace 6.1.R6软件对文献的发表时间、作者、国家、机构和关键词进行可视化分析。结果最终共纳入291篇文献,整体发文量呈上升态势;发文量最多的国家是美国;发文量最多的机构是Univ Jyvaskyla(于韦斯屈莱大学);研究热点主要集中在老年人生活空间流行病学调查、生活空间的评估、老年人生活空间受限的相关影响因素及不良结局。结论近年来老年人的生活空间问题受到持续关注,我国未来应加强与国外在生活空间研究领域的合作与交流,提高我国该领域的研究水平。
文摘为进一步了解国内2014—2023年智慧体育领域的总体研究进展,以中国知网(CNKI)核心数据库作为数据来源,利用Cite Space 6.2R6软件绘制出了作者、科研机构、关键词聚类和突现等知识图谱,对国内2014—2023年智慧体育进行可视化分析,对智慧体育研究动态及研究热点加以梳理,探讨发展趋势。研究显示,(1)2021年以来智慧体育的研究得到了越来越多学者的重视,发文数量骤增,开启了智慧体育研究的新篇章;(2)发文作者较多,但该领域核心作者群较少,合作关系不够密切;(3)研究机构以体育类院校为主、师范类与综合类院校为辅;(4)研究热点聚焦于体育产业高质量发展、智慧科技助力竞技体育、全民健身智慧化发展。
文摘Free field to Eardrum Thansfer Function (FETF) is one of the major factors influencing the identification of the sound source direction. FETF can be employed to generate a Virtual Acoustic Space (VAS) by computer and other equlpment. In this paper the methods to improve the measurement and estimation of FETF are approached. Least-mean-squares (LMS)method is much better than empirical FFT method. This paper also gives a sample description of excitation signals for measuring the impulse response of FETF.
文摘生态安全是国家安全和生态文明建设的重要组成部分,生态安全评价是生态安全管理的有效工具。以“Web of Science”核心集检索的“生态安全评价”文献为样本,采用Cite Space可视化工具分析近年来国内外生态安全评价研究状况。结果表明:(1)生态安全评价研究正处于爆发式增长阶段,过去12年间发表文献量年均增长率达到18.2%,近3年发文量超过总发文量的50%;(2)生态安全评价研究的高产研究机构和作者均在中国,在排名前20位的研究机构和第一作者中占比达到90%;(3)环境科学类期刊是生态安全评价研究信息传播的最主要平台,在载文量前30位的期刊中载文比例超过50%;(4)生态安全评价的研究对象广泛,研究内容丰富,具有以人与自然关系为核心和服务经济社会可持续发展为目标的特点;(5)生态安全评价方法研究主要集中在评价指标筛选优化和评价模型改进与创新方面。根据当前生态安全评价研究中存在的不足,提出了深化生态安全的内涵挖掘、优化评价指标体系、改进创新评价模型、加强国际合作与交流等建议。
文摘With the complete success of the 2nd stage of Chinese Manned Space Program(CMSP),several science researches have been performed on Tiangong-1 experimental spacelab, which was docked with three Shenzhou spaceships one after another. The China's real spacelab, Tiangong-2 will be launched in 2015, docked with a Shenzhou spaceship soon. After six months, it will be docked with the first Chinese cargo ship(Tianzhou-1). More space science researches, involving with space biology, fluid physics, fundamental physics, materials science, Earth science, astronomy and space environmental science, will be operated on Tiangong-2 spacelab, and crewed and cargo spaceships. Furthermore, the considerable large-scale space utilization of Shina's Space Station is planned. The research fields include yet not limited to space medicine and physiology, space life science and biotechnology, fluid physics and combustion in microgravity, space material science,and fundamental physics in microgravity, space astronomy, Earth science, space physics and space environment utilization, technology demonstration.