基于活动视角的城市建成环境与居民健康关系研究框架   总被引：5，自引：2，他引：3  

曹阳  甄峰  姜玉培 《地理科学》2019,39(10):1612-1620

快速城镇化在改变城市空间形态与布局的同时也对公众健康产生了间接影响,城市建成环境对居民健康的影响过程与作用模式的研究,一直是预防医学、地理学与环境科学等多学科关注的热点。以居民日常体力活动为中介变量,围绕“城市建成环境与居民健康关系”这一健康地理学研究的重要分支方向,提炼了不同尺度建成环境与居民健康关系的概念模型与作用模式。在此基础上,提出了“建成环境客观组织-居民主观感知-体力活动促进-健康效应产出”系统性研究框架,并从数据来源、研究方法、重点研究内容3个方面阐述了具体研究思路,认为通过居民活动识别空间利用与方案优化是未来微观尺度健康地理研究的重要结合方向,为后续实证研究提供理论支撑与范式借鉴,同时也为相关公共卫生政策制定提供参考依据。  相似文献   

国际工序贸易的空间经济分布效应研究——克鲁格曼开放度假说的再考察   总被引：1，自引：1，他引：0  

曹玉平 《地理科学》2019,39(9):1388-1397

基于开放经济新中心是否与封闭经济原有中心空间重合的视角,以中国为背景对国际工序贸易影响空间经济分布的三大渠道进行理论阐释,在全球价值链背景下重新考察克鲁格曼的开放度假说。在理论分析基础上,借助加工贸易集聚熵指数和空间赫希曼-赫芬达尔指数（及校正地理集中指数）分别度量各省国际工序贸易嵌入程度和空间经济集聚水平,以中国23个省2001~2016年的面板数据构建动态面板模型,利用差分和系统广义矩估计对提出的理论假说进行实证分析和稳健性检验。结果表明：与开放度假说相反,国际工序贸易促进省域空间经济集聚;且工序贸易对经济集聚的促进作用在沿海要大于内陆。  相似文献   

国际河流流域组织研究述评与展望     

张亦弛  曹辉  陈江龙  郑力源  安昭  黄丹奎 《热带地理》2019,39(6):919-930

作为国际河流长期合作开发的重要保障,国际河流流域组织这一联合制度安排备受关注,但参差不齐的绩效表现致使其可行性与有效性引发学者质疑。我国拥有众多国际河流,与之相关的合作开发是中国周边外交的重要抓手,但针对上述问题的研究未能得到国内学者的足够重视。在此背景下,文章首先回顾、梳理了国际河流流域组织的定义与类型,然后重点研判其制度设计特征和有效性,并指明已有研究所面临的方法困境,最后为解开“流域组织如何促进国际河流有效合作”这一难题提出以下研究建议：1）整合国际河流流域组织有效性评价指标并进行全球范围的评价;2）探明国际河流流域组织制度类型所适用的范围与条件;3）厘清不同国际河流流域组织制度设计特征与治理有效性的关系;4）基于过程视角探求国际河流流域组织有效性达成路径;5）采用超越定性与定量研究的新方法;6）立足地缘文明激发国际河流流域组织成员国的文化认同。  相似文献   

What do parameterized Om(z) diagnostics tell us in light of recent observations?     

Jing-Zhao Qi  Shuo Cao  Marek Biesiada  Teng-Peng Xu  Yan Wu  Si-Xuan Zhang  Zong-Hong Zhu 《天文和天体物理学研究(英文版)》2018,(6)

In this paper, we propose a new parametrization for Om(z) diagnostics and show how the most recent and significantly improved observations concerning the H(z) and SN Ia measurements can be used to probe the consistency or tension between the ΛCDM model and observations. Our results demonstrate that H0 plays a very important role in the consistency test of ΛCDM with H(z)data. Adopting the Hubble constant priors from Planck 2013 and Riess, one finds considerable tension between the current H(z) data and ΛCDM model and confirms the conclusions obtained previously by others. However, with the Hubble constant prior taken from WMAP9, the discrepancy between H(z) data and ΛCDM disappears, i.e., the current H(z) observations still support the cosmological constant scenario. This conclusion is also supported by the results derived from the Joint Lightcurve Analysis(JLA) SN Ia sample. The best-fit Hubble constant from the combination of H(z)+JLA(H00 = 68.81+1.5-1.49 km s-1 Mpc-1) is very consistent with results derived both by Planck 2013 and WMAP9, but is significantly different from the recent local measurement by Riess.  相似文献   

Comparison of otolith shape descriptors and morphometrics for stock discrimination of yellow croaker along the Chinese coast     

宋骏杰  赵博  刘金虎  曹亮  窦硕增 《中国海洋湖沼学报》2018,36(5):1870-1879

  相似文献   

Changing Connectivities of Chinese Cities in the World City Network,2010–2016     

Ben Derudder  Zhan Cao  Xingjian Liu  Wei Shen  Liang Dai  Weiyang Zhang  Freke Caset  Frank Witlox  Peter J. Taylor 《中国地理科学(英文版)》2018,28(2):183-201

Against the backdrop of the sizable economic growth of China in recent years, this paper uses the most recent data gathering of the Globalization and World Cities(Ga WC) research network to update and supplement earlier research on the shifting global connectivity of Chinese cities. The update consists of an evaluation of the connectivity of Chinese cities in 2016, the supplement of an analysis of the changing position of Chinese cities in the world city network between 2010 and 2016. To this end, we build on a specification of the world city network as an ‘interlocking network' in which producer services firms play the crucial role in city network formation. Information about the presence of leading producer services firms in cities in 2010 and 2016 is used as the input to a bipartite network projection algorithm in order to measure cities' network connectivity. The first set of results discusses the geographies of urban connectivity in the world city network in 2016. The second set of results discusses standardized measures of change to reveal the major dimensions of the transformations between 2010 and 2016. We find that, with the exception of Hong Kong, Macau and Kaohsiung of Taiwan, all Chinese cities record connectivity gains. This wholesale rise in connectivity is nonetheless geographically uneven, with above all Beijing, Chengdu/Chongqing and Changsha/Wuhan becoming more connected. We conclude that the wholesale rise of Chinese cities in the world city network and their changing trajectories in the post-crisis era are embedded in shifting external and internal political economies.  相似文献   

Functional characterization of a Δ6 fatty acid desaturase gene and its 5′-upstream region cloned from the arachidonic acidrich microalga Myrmecia incisa Reisigl (Chlorophyta)     

Zhang  Li  Cao  Haisheng  Ning  Pu  Zhou  Zhigang 《中国海洋湖沼学报》2018,36(6):2308-2321

Journal of Oceanology and Limnology - It is suggested that Δ6 fatty acid desaturase (FAD) plays a critical role in the biosynthesis of polyunsaturated fatty acids in plants and microalgae. But...  相似文献   

The Sources and Transport Patterns of Modern Sediments in Hangzhou Bay: Evidence from Clay Minerals     

Jinqing Liu  Ke Cao  Ping Yin  Fei Gao  Xiaoying Chen  Yong Zhang  Yiyong Yu 《中国海洋大学学报(英文版)》2018,17(6):1352-1360

Clay mineral compositions of 199 offshore surface sediment samples collected from the Hangzhou Bay have been analyzed. The clay minerals in the sediments from the Hangzhou Bay are dominated by illite(58.7%, on average), followed by chlorite(20.3%), kaolinite(16.9%) and smectite(4.1%). Two provinces were classified by Q-mode cluster analysis. Class Ⅰ with relatively low amounts of illite and smectite is widely distributed in the Hangzhou Bay, especially concentrated in the top and mouth of the bay, and the northern and southern nearshore areas. Class Ⅱ with comparatively high amounts of illite and smectite is mainly concentrated in the central part of the bay with the water depth of 8–10 m. By comparing clay mineral compositions with the neighbouring regions, we can find that the sediments in the Hangzhou Bay are mainly influenced by the resuspension and repeated deposition of particles from the Yangtze River due to the strong dynamic environment. In particular, the clay fraction of Class Ⅰ is mainly supplied by the Yangtze River, while the sediments of Class Ⅱ are mixture of the clay minerals carried by the Yangtze River and Qiantang River. In general, the distributions of clay minerals in the northern bay are affected by Yangtze River runoff, coastal current and flood tide together, and in the southern they are mainly affected by the Qiantang River runoff and ebb tide.  相似文献   

山东费县上冶地区地热资源特征研究          下载免费PDF全文

韩昱  刘玉仙  申丹丹  刘玉想  李波  孙中瑾 《山东国土资源》2018,34(11)

山东省临沂市被授牌为"中国地热城"。区内地热资源较为丰富,开发利用时间长,产生了显著的经济和社会效益。通过研究临沂市费县上冶地区的地质背景、地热地质特征,探求该地区的地热资源形成、发育的机理,对于指导区域地热资源的有效开发具有重要的意义。上冶地区南部奥陶纪马家沟群地层直接出露,大气降水直接或者间接补给岩溶热储含水层。近SN向的上冶东岭断裂及其次级断裂与蒙山断裂沟通,地下水通过断裂构造、岩溶孔洞、裂隙等通道向深部径流,受到大地热流的传导加热,在形成和运移过程中不断地溶滤热储围岩的各种化学成分。而上覆地层热导率低,具有一定的保温作用,从而使得地热资源在该地赋存和聚集。深部岩溶热储类型为典型的受断裂构造控制的层状兼带状热储。  相似文献   

Impacts of particulate matter on Gulf of Mexico tropical cyclones     

Wenjia Cao  Robert V. Rohli 《自然地理学》2019,40(3):294-305

This research analyzes the relationship between tropical cyclones and fine particulate matter (PM_2.5) for landfalling Atlantic tropical cyclones from 2000 to 2015. Daily mean PM₂.₅ concentrations were collected from the United States Environmental Protection Agency. Tropical cyclone data were acquired from Tropical Prediction Center Best Track Reanalysis in Unisys weather. GRIdded Binary (GRIB formatted) data were downloaded from the Data Support Section of the Computational and Information Systems Laboratory at the National Center for Atmospheric Research (NCAR). Tracks of tropical cyclones were overlaid with the interpolated daily mean PM₂.₅ concentration value. Results suggest that, in general, tracks are distant from areas with the largest PM₂.₅ concentrations. To examine the cause-effect nature of this relationship, simulation using the Weather Research and Forecasting (WRF) model suggests that the intensity of Hurricane Lili was weakened only after passing the most PM₂.₅-polluted area in Louisiana. This result suggests that aerosol loading may weaken the intensity of tropical cyclones, at least in some cases.  相似文献