房建工程地基基础施工关键技术探究

地基处理技术是近年来我国房屋建筑工程施工中一种较常见的施工处理技术,多见于房屋建筑工程中的软土地基施工环节。通过以往的房屋建筑经验,如果直接在软土地基上进行建筑施工,地基区域软土很容易会影响房屋建筑工程的稳定性,所以,在针对这一部分软土区域的施工环节,需要针对拟施工的地基软土区域进行处理,提升其软土的稳定性。到目前,地基处理技术已经在我国房屋建筑工程施工中广泛应用,这一技术应用过程中存在的不足也逐渐凸显,如何针对这一技术的不足予以完善,以此提升地基处理技术对房屋建筑质量的积极影响,成为了现阶段房屋建筑地基基础施工质量提升的重要环节之一。     

城市基础设施与居民消费水平——基于线上线下协同的促进机制

优化城市基础设施对于提升居民消费水平具有积极意义。交通与通讯两类基础设施对居民线上、线下消费的影响存在差异。在普及网购的同时改善城市居民出行条件，使实体店在展示产品、现场体验等方面与电商形成互补，将有助于实现线上、线下渠道的积极互动。以2011—2016年全国近300个地级市构建的面板数据进行计量分析，验证了基础设施对居民消费的促进作用，并发现当前交通、通讯两类设施的交互作用主要体现为协同效应。进一步的研究表明，以完善基础设施支持线上、线下渠道共同发展，还能够适应居民家庭年龄结构变化的新特点。上述结论说明,以完善基础设施促成渠道协同，将对全面优化消费者体验、提升居民消费水平产生重要作用。     

土壤污染防治法背景下的城乡绿地系统建设：趋势与对策

《中华人民共和国土壤污染防治法》的颁布标志着中国将形成完善的土壤污染防治法律体系，建立从污染土壤调查、修复、风险防控、监测到场地再利用，从环境标准到规划管理的全方位制度。生态文明制度建设的宏观背景，再加上中国土壤污染严重、规模大、修复难、成本高、周期长等特征，将导致大量污染场地转变为绿地或生态用地，最终对绿地系统的数量与规模、布局与功能、规划与管理、环境质量标准等多个维度产生实质性影响。分析这一趋势，对其影响提出预判，最终提出对策建议。     

Cacao Capitalism and Extended Urbanization: On the Contradictory Origins of Bounded Urbanism in Nineteenth‐century Coastal Ecuador

This article challenges both contemporary and classic urban theory by analyzing the historical case of coastal Ecuador. Working from primary and secondary sources, I track the urbanization of coastal Ecuador during the long nineteenth century, when cacao exports determined not only the economic wellbeing of the city of Guayaquil, but of the entire tropical lowland region. I argue that this extended urban geography was both experienced and practiced as an unbounded economic and cultural region. As the value of cacao exports skyrocketed, capitalists in the city invested in infrastructural projects and financial instruments, divorcing money‐making from cacao production. After the Gran Incendio (great fire) of 1896, the city was rebuilt according to the ideals of modern liberal planning that further separated the city from the country symbolically, despite their continued material interconnection. This work suggests that long histories of capitalist urbanization provide material and theoretical support for critiquing bounded urban theory both past and present, by moving beyond the city and highlighting the processes undergirding spatial production under capitalist social relations. Likewise, this historical case study argues that city‐centrism, rather than being constituted epistemologically, was tied to liberal notions of the urban based on nineteenth‐century ideologies of modernization and progress.     

市域(郊)铁路车辆选型方案探讨

随着城镇化进程的加快和城市经济辐射能力的增强,以特大城市中心城为核心的都市圈逐渐形成,都市圈内的经济联系更加紧密,都市圈核心区与外围的出行需求迅速增长,市域(郊)铁路的概念被引进,选择符合市域(郊)铁路特点的车辆类型是设计的重点。     

互联网使用、金融素养与金融决策*——基于2013—2017年中国家庭金融调查的研究

基于中国家庭金融调查2013—2017年面板数据，本文研究了互联网使用对我国家庭金融素养和金融决策的影响。本文借助2013年“宽带中国”战略实施带来的政策冲击构建工具变量，采用面板工具变量模型识别互联网使用的因果效应。研究发现，互联网使用促进了家庭对正规金融产品的投资，金融素养在二者之间发挥了显著的中介效应。互联网使用还有助于缩小我国城乡家庭在金融素养和金融决策方面的差距。本文为改善我国家庭金融素养和金融决策提供了启示。     

Debt Overhang and Deleveraging in the US Household Sector: Gauging the Impact on Consumption

Using a novel data set for the U.S. states, this paper examines whether household debt and the protracted debt deleveraging help explain the dismal performance of U.S. consumption since 2007 in the aftermath of the housing bubble. By separating the concepts of deleveraging and debt overhang—a flow and a stock effect—we find that excessive indebtedness exerted a meaningful drag on consumption over and beyond wealth and income effects. The overall effect, however, is modest—‐around one sixth of the slowdown in consumption between 2000–06 and 2007–12—and mostly driven by states with particularly large imbalances in their household sector. This might be indicative of non‐linearities, whereby indebtedness begins to bite only when misalignments from sustainable debt dynamics become excessive.     

Writing on the Wall: Street Art in Graffiti‐free Singapore

The legalization of graffiti in many cities has impacted urban landscapes and the way artists and the public view graffiti, street art and the city as well. This article considers the genesis, process and consequences of legal walls programmes firstly by introducing and differentiating the key terms ‘graffiti’, ‘street art’ and ‘legal walls’, then by examining an empirical case, that of Singapore. Renowned as a graffiti‐averse and litter‐free city, Singapore's recent about‐turn in legalizing illicit art forms illustrates changing government perspectives on creativity and legality in the country. Why the government has effected this change, how artists and members of the public have responded to it and the resultant art forms are critically explored. The conclusion reflects on four key lessons from Singapore for cities in general.     

海南城乡居民消费水平差异性分析和预测

从1985-2018年海南城乡居民收入、消费数据出发，分别建立消费关于收入、消费差距关于收入差距的自回归模型，结果表明农村居民当期消费更易受近期收入和消费水平的影响，具有不稳定性。再利用GM(1,1)模型预测城乡居民收入差距，结合自回归模型，完成未来10年海南城乡消费差距的预测：收入差距和消费差距将呈直线递增趋势，收入差距的增幅高于消费差距增幅。缩小海南城乡居民消费差距的根本途径在于缩小收入差距，应因地制宜，切实提高农民收入水平。     

Embedded Enclaves: Cultural Mimicry and Urban Social Exclusion in Iran

This article argues that symbolic boundaries and their spatial manifestation into embedded enclaves have become new forms of urban social exclusion. Based on participant observation and interviews among lower‐ and middle‐/upper‐class residents in the city of Sari, Iran, the article analyzes how the poor's physical circulations in the city and their performances of class and status have led to an elite backlash, as the latter find more refined markers of social separation in an effort to bolster their own exclusivity. Social distancing through the denigration of the poor and the construction of embedded enclaves brings to the fore the class tensions that are temporarily masked by the urban poor's spatial practices and cultural mimicry. As an advanced form of codified status inequality, embedded enclaves rely on the poor's citywide circulations and on increasing inter‐class interactions in order to communicate difference. Embedded—rather than cordoned off—in prominent areas of the city, such enclaves function as a reminder to the poor of all they cannot have. The upsurge of such establishments in the wake of Iran's shifting economic environment represents an attempt to shore up social position and restore the status quo.