泛长江三角洲城市旅游经济发展的空间效应

基于泛长江三角洲2002~2012年市域面板数据,并借助面板SDM及空间效应分解方法,对区域城市旅游经济发展及其动力因子的空间效应进行实证分析。结果表明:1区域城市入境和国内旅游发展都存在明显的空间依赖性和空间溢出效应,当邻近城市入境和国内旅游发展水平每提高1%,将促进本城市入境和国内旅游发展水平增加约0.257%和0.312%;2区域城市入境和国内旅游发展各动力因子的空间交互作用也较为明显。旅游资源禀赋、旅游服务设施、旅游交通设施和城市经济发展水平对入境旅游发展具有显著的空间溢出效应,旅游服务设施和城市经济发展水平对国内旅游发展的空间溢出效应也较显著。3保障性因子多为正向溢出,吸引性因子多为负向溢出。前者体现了动力因子的空间模仿效应,后者反映了空间竞争效应。保障性因子和吸引力因子的空间效应强度及作用路径差异推动着区域旅游发展格局不断演进。     

生态福利绩效视角下的上海市可持续发展评价研究

资源与环境约束加剧的大背景下,在"生态门槛"内实现社会福利最大化的可持续发展模式是未来城市发展的必然选择。从生态福利绩效视角出发,选取人均生态足迹和人类发展指数构建城市可持续发展评价指标体系,并采用DEA方法计算二者的投入产出效率,对上海市1999~2012年可持续发展水平进行多维度、动态化的实证分析。研究发现:1上海市人类发展指数、人均生态足迹与经济发展同步增长,但人均生态足迹水平大于生态承载能力,处于严重"生态赤字"状态,并不断恶化;2上海市多数年份的生态福利绩效处于DEA无效状态,且2005年以来进入规模收益递减通道。最后提出政策建议。     

长江中游城市群空间联系研究

基于城市流强度模型和城市间相互作用模型,以长江中游城市群27个地级市为研究对象,分析了城市群内的城市辐射能力及其内在的经济联系。结果表明:(1)长江中游城市群整体集聚和辐射能力较弱,区域内中低级城市流强度的城市占多数;(2)城市群内第二、三产业辐射能力存在较大差异,第二产业呈现出较强的辐射能力,而第三产业辐射能力较弱,并且其空间分布相对较为分散;(3)区域中心城市的核心带动作用总体较弱,辐射范围和辐射强度都有待加强;(4)长江中游城市群内城市间空间联系不够紧密,且联系程度空间差异较大。省际城市之间联系贫乏,城市间尚未形成联系紧密的辐射网络。     

南方丘陵地区河谷城市用地时空演变与驱动分析——以上饶市城区为例

以揭示中国南方丘陵地区河谷城市的空间演变过程和特征为目的,以上饶市城区为例,在遥感与GIS技术的支持下,对1988~2013年间上饶市城区城市用地的时空演变过程、特征及驱动影响因素进行了研究。结果表明,1988~2013年的25 a间,上饶市城区城市用地呈现出快速增长的态势,城市形态的演变具有明显的时空特征:时间序列上,不论扩展幅度还是扩展速度,2001~2013年间的值均高于1988~2001年间的值,前后两个时段的扩展特征呈现出明显的差异性;空间格局上,上饶市城区以老城区的中心广场为中心向四周扩展,先后经历了放射性扩展、组团式分散扩展两个阶段,同时呈现出明显的方向分异性,西南和西为其主要扩展方向,而其东南方向的扩展速度最为缓慢。自然环境中的地貌对上饶市城区城市用地的扩展起到很大的限制作用,经济社会的发展、政策规划等因素成为城市用地扩张与时空演化的外在驱动因素。     

上海都市旅游与长三角区域旅游的互动响应

随着经济全球化和区域一体化进程的加速,从长江三角洲地区区域旅游发展的视角重新审视上海都市旅游发展,探析都市旅游与其周边区域旅游发展的互动响应,具有重要的先导和示范效应。基于上海都市旅游发展面临挑战及长三角区域旅游合作进程的梳理,在对长三角旅游城市体系规模结构、长三角城市旅游经济联系度等指标的测评分析与研究基础上,提出上海都市旅游与长三角区域旅游互动响应路径首先是长三角核心城市（上海 南京 杭州）网络化发展,通过旅游产业网络化、市场网络化、组织网络化、服务保障体系网络化等各个子（分）网络共同构成互补、协作和理性竞争的长三角大旅游产业体系,尝试构筑“上海都市旅游 长三角区域旅游”共轭型的旅游地域综合体,旨在推进上海都市旅游与长三角区域旅游的和谐可持续发展,进而提升长三角区域旅游的整体竞争优势。     

A methodology for assessing urban sustainability: Aalborg commitments baseline review for Riga, Latvia

Both the Aalborg Commitments and the guidance on integrated urban environmental management and sustainable urban transport plans proposed by the EU Thematic Strategy on the Urban Environment foresee a baseline review as the first step in developing integrated urban management plans and systems. A baseline review of urban sustainability undertaken in Riga reveals significant discrepencies between the sustainability criteria of the Aalborg Commitments and the: responsibilities and competencies of the municipal government and administration as defined by statutes; policy goals and measures defined in municipal planning documents; policy goals and measures defined in the Riga Development Plan. To better orient the mandate of the municipality towards sustainable development, municipal statutes should be supplemented to more fully reflect the issues defined by the Aalborg Commitments and should include sustainability as a goal. In order to strengthen the implementation of sustainable development specific policy goals, measures and targets should be formulated for all the Aalborg Commitments issues when revising existing municipal planning documents or developing a municipal sustainable development management plan. An analysis of the European Common Indicators and the State of the Environment in Riga 2001 indicators indicates that they can only partially fulfill a monitoring function for the implementation of the Aalborg Commitments. This highlights a need to better coordinate sustainable development initiatives at the European level. The methodology used for the baseline review in Riga is useful for assessing the status of urban sustainability when preparing integrated urban management plans or systems, but requires testing elsewhere. Readers should send their comments on this paper to BhaskarNath@aol.com within 3 months of publication of this issue.     

城市轨道交通噪声的声源特性研究进展

分析了城市轨道交通噪声的主要类型、基本特性、传播规律及其影响因素;综述了国内外城市轨道交通噪声的预测及测量分析技术的研究成果,并对其进行了总结比较,阐述了各种方法的特点、主要成就和局限;最后探讨了城市轨道交通噪声领域今后的研究方向和发展趋势,为解决城市轨道交通发展中的噪声问题提供了参考.     

固相萃取-高效液相色谱法测定地表水中的溴氰菊酯

建立了固相萃取-高效液相色谱-二极管阵列扫描测定地表水中溴氰菊酯的方法。溴氰菊酯经C18小柱富集,用6．0mL二氯甲影丙酮（1：1,v／v）洗脱,氮吹转换溶剂为甲醇并定容至1mL后由高效液相色谱仪进行分析,检测波长为270hm,通过保留时间与特征紫外吸收图谱定性,外标法定量。方法检出限1．0ug／L;线性范围1．0～97．0ug,／L,／相关系数0．9999;相对标准偏差7．7％-17．5％（n=6）;回收率在90．6％～111．9％。方法简单,快速,经济环保。     

FS—IV^＋流动注射仪测定地表水中氨氮

铵与碱性酚和次氯酸钠反应生成靛蓝化合物,其色度与铵的浓度成正比,亚硝基氰化物使蓝色增强,在660nm处测量吸光度值;采用Flow Solution-IV^＋（FS-IV^＋）流动注射仪测定地表水中氨氮,检测范围0～10．00mg／L,检出限0．008mg／L,分析速率51个样S／h;对方法精密度、准确度、加标回收进行了实验,结果令人满意。该方法具有自动进样、分析速率快、试剂耗量低等优点,可应用于大批量常规地表水分析。     

Regional impervious surface estimation: an urban heat island application

This paper describes a GIS-based estimation method that can be used to forecast future amounts of impervious surface as a mitigation measure for urban heat island effect in a metropolitan region. The method is unique because it employs a regression model that links the existing amount of impervious surface to population and employment at the census tract level. This approach provides a means to forecast future amounts of impervious surface based on projected population and employment. The method also includes a detailed analysis of high-resolution aerial photography to divide impervious surfaces into different categories. Subdividing impervious surfaces is necessary to evaluate potential urban heat island mitigation policies for different types of impervious surface. The analysis here shows that the impervious surface in the metropolitan Atlanta region will increase to 2638 km2 2. “The Albedo is defined as the hemispherical reflectivity averaged over the solar spectrum. A perfect reflector has a = 1, and a perfect absorber has a = 0” (Pomerantz et al. 1999 Pomerantz, M. 1999. Reflective surfaces for cooler buildings and cities. Philosophical magazine B, 79: 1457–1476. [Taylor & Francis Online], [Web of Science ®] [Google Scholar], p. 1458). View all notes in 2030, an increase of 45% from 2000. The most common type of impervious surface is dark-coloured pavement. Within this study area, the analyses showed that two-thirds of impervious surfaces are dark. Replacing dark pavement with light pavement materials, therefore, represents an important opportunity to mitigate the urban heat island effect in the Atlanta region.