Thirty Years of Regulatory Detailed Planning: Gains and Losses, and Prospects

吕传廷(中国城市规划学会理事,中国城市规划学会控规学术委员会主任委员,广州市城市规划编制研究中心主任,教授级高级工程师,本论坛主持人):非常高兴诸位嘉宾、代表参加由广州城市规划编制研究中心、深圳规划国土发展研究中心、重庆规划研究中心三家单位联合举办的"控制

让城市总体规划更有用

今天这场学术对话的主题是\"让城市总体规划更有用\"。城市总体规划是一个城市全局性、综合性规划,在统筹城乡发展、优化空间开发格局、合理配置空间资源、保障公共利益等方面发挥着战略引领和刚性控制作用,是城市重要的公共政策和指导城市建设的法定依据。无论从城乡规划法律的制度设计还是从城市总体规划的属性来看

氢原子钟用变容调谐装置A

本发明提供一种氢原子钟用变容调谐装置，包括：一套筒，套筒内部形成一安装空间，套筒接地；一内轴，内轴设置于安装空间内，内轴的两端分别设置有一第一连接端和一第二连接端，第二连接端连接一电压输入端；至少一绝缘环，绝缘环设置于套筒与内轴之间；一PCB板，PCB板连接于第一连接端，PCB板用于调节微波腔的谐振频率；一耦合天线，耦合天线的一端连接于套筒，耦合天线的另一端连接所述PCB板。本发明的氢原子钟用变容调谐装置，在保证滤波效率的基础上，简化了氢原子钟用变容调谐装置的滤波结构，使其安装结构得以简化，同时提高了滤波结构的强度，并能提高腔频的调节范围，具有结构简单、强度高、调节范围大和适用性强的优点

氢原子钟用变容调谐装置B

本发明提供一种氢原子钟用变容调谐装置，包括：一套筒，套筒内部形成一安装空间，套筒接地；一内轴，内轴设置于安装空间内，内轴的两端分别设置有一第一连接端和一第二连接端，第二连接端连接一电压输入端；至少一绝缘环，绝缘环设置于套筒与内轴之间；一PCB板，PCB板连接于第一连接端，PCB板用于调节微波腔的谐振频率；一耦合天线，耦合天线的一端连接于套筒，耦合天线的另一端连接所述PCB板。本发明的氢原子钟用变容调谐装置，在保证滤波效率的基础上，简化了氢原子钟用变容调谐装置的滤波结构，使其安装结构得以简化，同时提高了滤波结构的强度，并能提高腔频的调节范围，具有结构简单、强度高、调节范围大和适用性强的优点

生物地理模型研究进展及在干旱半干旱区的应用/Advances in Researches of Biogeographic Model and Its Application in the Arid and Semi-Arid Regions, China[J]

生物地理模型是实现生态保护计划的重要工具.从生物地理模型研究的背景出发,论述了它的发展是科学和实践的需求,分析了基于生态位理论的生物地理模型发展所面临的挑战,特别是数据的获取和关键变量的选择,展望了生物地理模型的发展前景,并对其在干旱半干旱区的应用进行了综述,旨在理解生物地理模型在陆面过程研究和生态恢复中的重要性,以期推动生物地理过程与之相关过程的耦合模拟研究

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