公益旅游的迅猛发展及其所蕴含的种种矛盾使之成为学术研究的热点。文章以Web of Science为数据源,运用社会网络分析方法对境外公益旅游的研究热点、知识基础、研究力量等知识进化的属性与特征进行了分析。结果表明:(1)境外公益旅游研...公益旅游的迅猛发展及其所蕴含的种种矛盾使之成为学术研究的热点。文章以Web of Science为数据源,运用社会网络分析方法对境外公益旅游的研究热点、知识基础、研究力量等知识进化的属性与特征进行了分析。结果表明:(1)境外公益旅游研究在经历了起步阶段、理性探索阶段后,现处于研究拓展阶段,其研究热点呈现出由单纯的动机和影响研究向主客关系、推动机制、项目效果评估等多角度复合研究转变的趋势;(2)涉及内涵研究、旅游影响、文化交流与冲突、项目评估等主题的12篇文献对公益旅游领域的知识演进起到了重要推动作用;(3)公益旅游领域的研究人员之间存在多个小组合作关系,其中以Mc Gehee和Wearing为核心的合作网络较为稳定,但小组之间的协作与知识流动较少;(4)公益旅游领域的研究力量集中在北美、欧洲和大洋洲,其中弗吉尼亚理工大学的研究成果较为显著,各地区、研究机构之间的合作较少,尚未形成规模化的合作网络。展开更多
On May 6, 2009, the X-ray imaging and biomedical application beamline(BL13W1) at Shanghai Synchrotron Radiation Facility(SSRF) officially opened to users, with 8–72.5 ke V X-rays. The experimental station is equipped...On May 6, 2009, the X-ray imaging and biomedical application beamline(BL13W1) at Shanghai Synchrotron Radiation Facility(SSRF) officially opened to users, with 8–72.5 ke V X-rays. The experimental station is equipped with four sets of X-ray CCD detectors of different pixel size(0.19–24 μm) for on-line phase-contrast imaging and micro-CT imaging with 0.8 μm spatial resolution and 1 ms temporal resolution. An in vivo microCT experiment for a living insect was realized in 4 s. An X-ray fluorescence detector is equipped for X-ray fluorescence mapping imaging and X-ray fluorescence micro-CT imaging with 50 μm spatial resolution. In order to meet different requirements from the users, several experimental methods, such as X-ray spiral micro-CT, Xray local micro-CT, X-ray fast micro-CT, X-ray grating-based differential micro-CT, X-ray fluorescence microCT and X-ray quantitative micro-CT have been developed, and nearly 60 papers related to those developments for this beamline have been published. Moreover, the beamline has realized the remote fast CT reconstruction,providing a great convenience for the users to process experimental data at their offices. As of August 2014,the beamline has offered the user beamtime of(23 145 h), from which 232 user papers have been published,including 151 SCI papers and 55 papers with SCI impact factor > 3. The quantity and quality of the user paper outcome keep a steady increase. Some typical user experimental results are introduced.展开更多
文摘公益旅游的迅猛发展及其所蕴含的种种矛盾使之成为学术研究的热点。文章以Web of Science为数据源,运用社会网络分析方法对境外公益旅游的研究热点、知识基础、研究力量等知识进化的属性与特征进行了分析。结果表明:(1)境外公益旅游研究在经历了起步阶段、理性探索阶段后,现处于研究拓展阶段,其研究热点呈现出由单纯的动机和影响研究向主客关系、推动机制、项目效果评估等多角度复合研究转变的趋势;(2)涉及内涵研究、旅游影响、文化交流与冲突、项目评估等主题的12篇文献对公益旅游领域的知识演进起到了重要推动作用;(3)公益旅游领域的研究人员之间存在多个小组合作关系,其中以Mc Gehee和Wearing为核心的合作网络较为稳定,但小组之间的协作与知识流动较少;(4)公益旅游领域的研究力量集中在北美、欧洲和大洋洲,其中弗吉尼亚理工大学的研究成果较为显著,各地区、研究机构之间的合作较少,尚未形成规模化的合作网络。
基金Supported by the National Natural Science Foundation of China(Nos.11475248 and 11105213)
文摘On May 6, 2009, the X-ray imaging and biomedical application beamline(BL13W1) at Shanghai Synchrotron Radiation Facility(SSRF) officially opened to users, with 8–72.5 ke V X-rays. The experimental station is equipped with four sets of X-ray CCD detectors of different pixel size(0.19–24 μm) for on-line phase-contrast imaging and micro-CT imaging with 0.8 μm spatial resolution and 1 ms temporal resolution. An in vivo microCT experiment for a living insect was realized in 4 s. An X-ray fluorescence detector is equipped for X-ray fluorescence mapping imaging and X-ray fluorescence micro-CT imaging with 50 μm spatial resolution. In order to meet different requirements from the users, several experimental methods, such as X-ray spiral micro-CT, Xray local micro-CT, X-ray fast micro-CT, X-ray grating-based differential micro-CT, X-ray fluorescence microCT and X-ray quantitative micro-CT have been developed, and nearly 60 papers related to those developments for this beamline have been published. Moreover, the beamline has realized the remote fast CT reconstruction,providing a great convenience for the users to process experimental data at their offices. As of August 2014,the beamline has offered the user beamtime of(23 145 h), from which 232 user papers have been published,including 151 SCI papers and 55 papers with SCI impact factor > 3. The quantity and quality of the user paper outcome keep a steady increase. Some typical user experimental results are introduced.