社会工作视野下的城市少数民族流动人口问题

城市少数民族流动人口问题正逐渐成为社会关注的一大热点,文章主要对城市少数民族流动人口的现状、特点,对城市发挥的积极功能和城市少数民族流动人口问题的具体表现作一概述,并从社会工作这一新的视角分析了城市少数民族流动人口问题的成因,在此基础上就社会工作如何介入此问题提出一些建议.     

中国城市居民最低生活保障水平分析

以2005年的统计数据为主要依据,通过测算及横向与纵向的比较,对我国城市居民最低生活保障水平进行了分析,目的在于廓清人们对中国目前最低生活保障水平的认识.综合分析表明,尽管在制度设计和具体实施中仍存在缺陷和问题,但保障水平过高肯定不是当前低保制度面临的问题,对低保"养懒汉"的抨击也是一种片面的夸大.     

论我国城市社区的政治文化建构

20世纪90年代以来,随着我国市场经济、市民社会和民主政治的发展以及社区权力结构和治理模式的转型,城市社区的政治文化建构作为社区文化建设必不可少的组成部分,其作用和重要性愈来愈受到人们的重视。法律的相对滞后、见物不见人的文化心理、责权利的分离以及“社区人“意识的淡薄,是阻碍城市社区政治文化建构的主要因素。只有从中国政治发展和构建社会主义和谐社会的全局出发,坚持马克思主义主阵地,弘扬社会主义核心价值观,在实践中积极培育新型公民文化,改进政治社会化方式,建立有效的工作机制等,才是正确建构城市社区政治文化的根本途径。     

Assessing the effects of land use and land cover patterns on thermal conditions using landscape metrics in city of Indianapolis,United States

Direct applications of remote sensing thermal infrared (TIR) data in landscape ecological research are rare due to limitations in the sensors, calibration, and difficulty in interpretation. Currently there is a general lack of methodology for examining the relationship between land surface temperatures (LST) derived from TIR data and landscape patterns extracted from optical sensors. A separation of landscapes into values directly related to their scale and signature is a key step. In this study, a Landsat ETM+ image of Indianapolis, Unites States, acquired on June 22, 2000, was spectrally unmixed (using spectral mixture analysis, SMA) into fraction endmembers of green vegetation, soil, high albedo, and low albedo. Impervious surface was then computed from the high and low albedo images. A hybrid classification procedure was developed to classify the fraction images into seven land use and land cover (LULC) classes. Using the fractional images, the landscape composition and pattern were examined. Next, pixel-based LST measurements were correlated with the landscape fractional components to investigate LULC based relationships between LST and impervious surface and green vegetation fractions. An examination of the relationship between the LULC and LST maps with landscape metrics was finally conducted to deepen understanding of their interactions. Results indicate that SMA-derived fraction images were effective for quantifying the urban morphology and for providing reliable measurements of biophysical variables. LST was found to be positively correlated with impervious surface fraction but negatively correlated with green vegetation fraction. Each temperature zone was associated with a dominant LULC category. Further research should be directed to the theoretical and applied implications of describing such relationships between LULC patterns and urban thermal conditions.

Bridging the divide in urban sustainability: from human exemptionalism to the new ecological paradigm

This paper reviews the main bodies of contemporary urban sustainability theory. From this analysis, two underpinning paradigms of urban sustainability are identified: (1) The ‘Human Exemptionalism Paradigm’ (HEP), which emphasizes the ability of humans to overcome environmental problems—see Urban Sociology, Urban Ecology, Urban Geography, Urban Psychology and Political Economy; and (2) The ‘New Ecological Paradigm’ (NEP), which emphasizes the criticality of ecological limits to human progress—see Urban Metabolism, Energy/Emergy Analysis and Ecological Footprinting. Each of these approaches is critically reviewed, highlighting their main assumptions, theoretical and practical foci. It is argued in the paper that if the related issues of urban sustainability and development are to be progressed, there needs to be: (1) a greater maturation of the NEP approaches, which are ‘relative newcomers’ to the area of urban theory; and (2) greater integration and dialogue between the HEP and NEP approaches to urban sustainability than has hitherto been the case.

“乡下人进城”文学叙事的政治伦理遮蔽与还原--以《我们夫妇之间》、《霓虹灯下的哨兵》为中心

萧也牧的《我们夫妇之间》和沈西蒙、漠雁、吕兴臣编剧的九场话剧《霓虹灯下的哨兵》是较早的“乡下人进城”作品.《我》的饱受争议与《霓》剧的名噪一时形成了鲜明的反差,这源于二者对城乡日常生活方式差异的不同想象.经由这一文学现象的考察,可见当代城乡差异叙事逐渐剥离阶级、国家意识的遮蔽与替代转向不同身份的生命的“生”的个体差异.“差异”的历史衍义折射了国家、阶级、民族宏大叙事的祛魅以及对生命本体差异现状的正视与回归.透视“差异”衍义的审美经验背后的政治,可知进城的乡下人在创造生活的同时也在创造一种历史.     

重庆一小时经济圈客运交通轨道化的适应性分析

简要介绍重庆一小时经济圈发展概况;探讨重庆一小时经济圈客运交通轨道化的必要性;从干线铁路具有大量的富裕运能、大量的同城客流作保证、良好的安全性能和环境效益等几个方面论述重庆一小时经济圈客运交通轨道化的可行性。     

中国小微企业市场适应能力研究

小微企业以其灵活的市场适应能力,已经成为中国经济建设的一支重要力量,在分析小微企业市场适应能力的影响因素基础上,采用多级可拓综合评价方法对某小微企业进行了评价,并提出了提升小微企业市场适应能力的措施。     

Influence of urban landscape structure on bird fauna: a case study across seasons in the city of Valencia (Spain)

Studies on bird fauna of urban environments have had a long history, but the potential of studies mapping the distribution of birds in cities probably has not fully developed. The bird fauna of the municipality of Valencia (Spain) was studied to determine the influence of urbanization on bird species richness and abundance. Birds were censused during winter and the breeding season of years 1997–1998 in 197 squares measuring 49 ha each from a rural and an urbanized area. Across seasons the number of species decreased around 40% in the city compared with the rural landscape surrounding it. Such pattern could be attributed to the low number of farmland species capable to use the habitats inside the city, and the limited ability of urban parks in attracting woodland species. In the urban landscape, the influence of the dimensions and spatial arrangement of habitat patches was outweighed by the amount of each habitat per square. Bird richness and the abundance of most species were negatively related with the amount of built-up habitat per square and positively with the amount of urban parks, and of habitat diversity. Conversely, bird fauna was largely independent of mean park size per square especially during winter, indicating that at the landscape scale even small patches of habitat could play an ecological role. Conservation of urban bird diversity could benefit of two complementary strategies: (i) the protection of the surrounding rural landscape from urban development; (ii) habitat enhancement within the city. Particularly, a proper design and habitat management of urban parks could improve their suitability for urban bird fauna.     

理性习惯偏好与居民消费行为

 经济体制改革以来，随着经济的持续快速增长中国城镇居民已经习惯于生活水平不断提高。在这样的环境中，如果一个家庭当年消费的数量和上一年相同，其幸福感就会打折扣；另一方面，消费还具有外部性，如果与他人相比自己的消费水平降低了，消费者的效用也会受到损失。因此，理性消费者的决策目标是保持消费长期稳定增长而不仅仅是消费在各个时期的均匀分配。利用1978-2008年中国26个省（直辖市）的城镇住户调查数据得到的实证分析结果显示：消费者的习惯偏好与制度环境有关。受传统计划体制影响，1990前中国城镇居民的习惯偏好具有明显的“短视”特征。1990-2008年的估计结果则支持了理性习惯形成假设。即内部习惯形成导致了边际消费倾向明显下降，并且消费攀比是理性的。