国外生态城市近十年研究回顾——基于Citespace软件的可视化分析

低碳生态转型已成为目前我国城市发展的关键,以生态城市建设落实可持续发展也成为引导城市发展的重要手段。文章回顾了国际生态城市研究的发展历程,从文献时间及领域分布、代表人物及文章、研究前沿、研究趋势和主要研究内容5方面入手,将web of science核心数据库中2008~2017年近10年间关于生态城市的相关研究论文,利用Citespace软件进行可视化分析。研究发现,国外生态城市相关研究趋于向实证及数据分析方向发展,可持续发展、绿地空间及气候应对仍是研究热点。文章系统梳理近10年在\"城市研究\"领域的共2124篇相关文献,详细阐述\"生物多样性及生态系统服务\"\"气候变化应对及城市降温\"\"绿地及绿色基础设施\"\"城市规模与土地利用\"和\"可持续发展下的政府及公众参与\"共5个主要研究内容,以期为我国生态城市相关领域研究和实践提供借鉴。清华大学生态规划与绿色建筑教育部重点实验室基金(编号:2013U-5);;厦门大学中央高校基本科研业务费专项基金(编号:20720150107

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies