Guangzhou is the capital and largest city（land area：7287 km2）of Guangdong province in South China.The air quality in Guangzhou typically worsens in November due to unfavorable meteorological conditions for pollutan...Guangzhou is the capital and largest city（land area：7287 km2）of Guangdong province in South China.The air quality in Guangzhou typically worsens in November due to unfavorable meteorological conditions for pollutant dispersion.During the Guangzhou Asian Games in November 2010,the Guangzhou government carried out a number of emission control measures that significantly improved the air quality.In this paper,we estimated the acute health outcome changes related to the air quality improvement during the 2010 Guangzhou Asian Games using a next-generation,fully-integrated assessment system for air quality and health benefits.This advanced system generates air quality data by fusing model and monitoring data instead of using monitoring data alone,which provides more reliable results.The air quality estimates retain the spatial distribution of model results while calibrating the value with observations.The results show that the mean PM2.5concentration in November 2010 decreased by 3.5μg/m^3 compared to that in 2009 due to the emission control measures.From the analysis,we estimate that the air quality improvement avoided 106 premature deaths,1869 cases of hospital admission,and 20,026 cases of outpatient visits.The overall cost benefit of the improved air quality is estimated to be 165 million CNY,with the avoided premature death contributing 90%of this figure.The research demonstrates that Ben MAP-CE is capable of assessing the health and cost benefits of air pollution control for sound policy making.展开更多
生态系统文化服务(CES)作为生态系统服务的重要组成部分之一,具有连接人类、社会文化与自然,尤其是与特定区域自然环境相互联系的纽带作用,对保护生态环境和增进人类福祉具有十分重要的意义。本文使用CiteSpace软件,对Web of Science网...生态系统文化服务(CES)作为生态系统服务的重要组成部分之一,具有连接人类、社会文化与自然,尤其是与特定区域自然环境相互联系的纽带作用,对保护生态环境和增进人类福祉具有十分重要的意义。本文使用CiteSpace软件,对Web of Science网站2010—2023年369条文献数据进行主题词网络、高频和中心主题词、主题词聚类等分析,归纳了主要的CES研究类别及其主要开展的视角。结果表明,2010—2023年CES研究获得快速发展,研究对象主要为(1)位于城市内部、具有较高进入性、重视个体身心情感体验的城市公园绿地,(2)提供游憩娱乐价值、美学价值、部分精神/宗教价值的旅游地,(3)关注土地利用、景观管理和人地关系等领域的保护地;整体呈现由货币化方法向非货币化方法转向,由微观尺度向宏观微观相结合转向,由关注价值评估向关注人类感知体验转向,由单一视角研究向多学科多视角研究转向等特点。未来研究需加强多学科交叉,尤其是与人文社会科学领域的交叉研究,重视人地关系与CES的相互影响,探索CES价值实现的多元机制和模式,助力人、自然与社会的和谐统一。展开更多
介绍了基于PDA的电子地图系统开发的关键技术:精简的存储结构设计和内存映射技术,可以最大程度地减少存储空间和运行资源消耗。作者采用该技术,使用Microsofte Mbedded Visual C++ 3.0开发了基于Microsoft Windows CE的PDA电子地图系统E...介绍了基于PDA的电子地图系统开发的关键技术:精简的存储结构设计和内存映射技术,可以最大程度地减少存储空间和运行资源消耗。作者采用该技术,使用Microsofte Mbedded Visual C++ 3.0开发了基于Microsoft Windows CE的PDA电子地图系统EmGIS。展开更多
Windows CE Platform Builder提供了创建、裁剪和配置Windows CE的所有开发和调试工具,深刻理解和灵活运用Platform Builder的配置文件是定制适合目标平台的Windows CE操作系统的关键。本文详细分析了Platform Builder的各种配置文件,...Windows CE Platform Builder提供了创建、裁剪和配置Windows CE的所有开发和调试工具,深刻理解和灵活运用Platform Builder的配置文件是定制适合目标平台的Windows CE操作系统的关键。本文详细分析了Platform Builder的各种配置文件,同时也对映像文件NK.BIN的编译生成过程进行了深入的分析。展开更多
设f是一个压缩常数为h的压缩映象,T是一个非扩张映象使得F(T)≠Φ。{xn}是由下式xn+1=αnf(xn)+(1-αn)1/n+1 sum Tjxn from j=0 to n,n∈N,定义的迭代序列,其中{αn}(0,1)且满足lim αn=0 n→∞和sum αn=∞ from n=1 to ∞。证明{...设f是一个压缩常数为h的压缩映象,T是一个非扩张映象使得F(T)≠Φ。{xn}是由下式xn+1=αnf(xn)+(1-αn)1/n+1 sum Tjxn from j=0 to n,n∈N,定义的迭代序列,其中{αn}(0,1)且满足lim αn=0 n→∞和sum αn=∞ from n=1 to ∞。证明{xn}强收敛于F(T)中某个变分不等式的唯一解。结果改进了Xu,Shimizu-Takahashi和Shioji-Takahashi的主要结果。展开更多
基金provided by the US Environmental Protection Agency(No.5-312-0212979-51786L)the Guangzhou EnvironmentalProtection Bureau(No.x2hj B2150020)+3 种基金the project of an integrated modeling and filed observational verification on the deposition of typical industrial point-source mercury emissions in the Pearl River Deltsupported by the funding of the Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control(No.2011A060901011)the project of Atmospheric Haze Collaboration Control Technology Design from the Chinese Academy of Sciences(No.XDB05030400)the National Environmental Protection Public Welfare Industry Targeted Research Foundation of China(No.201409019)
文摘Guangzhou is the capital and largest city（land area：7287 km2）of Guangdong province in South China.The air quality in Guangzhou typically worsens in November due to unfavorable meteorological conditions for pollutant dispersion.During the Guangzhou Asian Games in November 2010,the Guangzhou government carried out a number of emission control measures that significantly improved the air quality.In this paper,we estimated the acute health outcome changes related to the air quality improvement during the 2010 Guangzhou Asian Games using a next-generation,fully-integrated assessment system for air quality and health benefits.This advanced system generates air quality data by fusing model and monitoring data instead of using monitoring data alone,which provides more reliable results.The air quality estimates retain the spatial distribution of model results while calibrating the value with observations.The results show that the mean PM2.5concentration in November 2010 decreased by 3.5μg/m^3 compared to that in 2009 due to the emission control measures.From the analysis,we estimate that the air quality improvement avoided 106 premature deaths,1869 cases of hospital admission,and 20,026 cases of outpatient visits.The overall cost benefit of the improved air quality is estimated to be 165 million CNY,with the avoided premature death contributing 90%of this figure.The research demonstrates that Ben MAP-CE is capable of assessing the health and cost benefits of air pollution control for sound policy making.
文摘生态系统文化服务(CES)作为生态系统服务的重要组成部分之一,具有连接人类、社会文化与自然,尤其是与特定区域自然环境相互联系的纽带作用,对保护生态环境和增进人类福祉具有十分重要的意义。本文使用CiteSpace软件,对Web of Science网站2010—2023年369条文献数据进行主题词网络、高频和中心主题词、主题词聚类等分析,归纳了主要的CES研究类别及其主要开展的视角。结果表明,2010—2023年CES研究获得快速发展,研究对象主要为(1)位于城市内部、具有较高进入性、重视个体身心情感体验的城市公园绿地,(2)提供游憩娱乐价值、美学价值、部分精神/宗教价值的旅游地,(3)关注土地利用、景观管理和人地关系等领域的保护地;整体呈现由货币化方法向非货币化方法转向,由微观尺度向宏观微观相结合转向,由关注价值评估向关注人类感知体验转向,由单一视角研究向多学科多视角研究转向等特点。未来研究需加强多学科交叉,尤其是与人文社会科学领域的交叉研究,重视人地关系与CES的相互影响,探索CES价值实现的多元机制和模式,助力人、自然与社会的和谐统一。
文摘设f是一个压缩常数为h的压缩映象,T是一个非扩张映象使得F(T)≠Φ。{xn}是由下式xn+1=αnf(xn)+(1-αn)1/n+1 sum Tjxn from j=0 to n,n∈N,定义的迭代序列,其中{αn}(0,1)且满足lim αn=0 n→∞和sum αn=∞ from n=1 to ∞。证明{xn}强收敛于F(T)中某个变分不等式的唯一解。结果改进了Xu,Shimizu-Takahashi和Shioji-Takahashi的主要结果。
