中国城市居住分异研究

对城市居住空间的研究是城市社会学的一个重要内容.自建国以来,我国城市居住空间经历了逐渐分异的历史变迁过程.如果不对居住分异加以适当的调控就会出现居住空间极化与隔离问题.城市居住空间极化是社会不公正在居住空间上的表现.城市政治经济转变与城市规划、土地制度改革与房地产开发、住房制度改革与住房商品化是转型过程中城市居住分异形成的三个主要原因.扩大中等收入群体规模、增加社会自组织力量、制定公正的社会政策是优化城市居住空间结构的有效途径.     

浦东新区迁入人口的分异

浦东新区的极化开发形成了区际迁移和省际迁移两股人口迁入流.由于来源地不同,他们在年龄、受教育程度、行职业、收入和居住等方面形成了分异现象,与此同时,也产生了社区重构、社会极化和社会矛盾等问题.劳动力市场分层响应和城市生态位势空间响应是迁入人口分异的主要响应机理.迁入人口的分异问题会影响浦东新区的社会稳定和发展,因此,必须引起足够重视.     

Canada's Housing Bubble Story: Mortgage Securitization,the State,and the Global Financial Crisis

Canada's experience during and after the financial crisis appears to distinguish it from its international peers. Canadian real estate sales and values experienced record increases since the global financial crisis emerged in 2008, rather than declines, and Canada did not witness any bank failures. The dominant trope concerning Canada's financial and housing markets is that they are sound, prudent, appropriately regulated and ‘boring but effective’. It is widely assumed that Canadian banks did not need, nor receive, a ‘bailout’, that mortgage lending standards remained high, and that the securitization of mortgages was not widespread. The truth, however, does not accord with this mainstream view. In fact, the Canadian financial and housing markets reveal marked similarities with their international peers. Canada's banks needed, and received, a substantial ‘bailout’, while federal policies before and after the financial crisis resulted in the massive growth of mortgage securitization and record household indebtedness. This article documents the growth of Canada's housing bubble, the history of mortgage securitization, and of government policies implemented before and after the crisis. Instead of making the Canadian financial and housing sectors more resilient and sustainable, the outcomes of state responses are best understood as regressively redistributive.     

以政府职能转变推动收入分配改革

收入和财富分配的不平等一直是中国改革发展中的重要问题。针对中国经济的特点,可以从政府改革的角度来研究如何更好地进行收入分配改革。地方政府主导推动地方经济的做法对收入不平等的扩大起了重要作用,加快政府职能转换,是使收入分配改革真正落到实处的破局之处,也是实现收入分配合理化可行的第一步。要改变地方政府的经济职能,降低它直接参与基础设施的程度,改革地方土地财政,建立垂直管理机构,以分散它的一部分经济管理职能,为收入分配改革打开空间。     

Beyond a Liberal Critique of ‘Trickle Down': Urban Planning in the City of Malmö

This article scrutinizes the much used, but less examined, concept of ‘trickle down' in an urban setting. We make a distinction between the production of and distribution in the city, and argue that trickle down in contemporary urban policy could be regarded as the liberal link between production and distribution. Based on interviews with key figures and document analyses, we look at the transformation of the Swedish city of Malmö from an industrial to a post‐industrial city, where, during the last two decades, we have found three concurrent components: the ideology of trickle down; several urban policy programs and governmental policies to ‘make' money and resources trickle down; as well as increased economic polarization and segregation. A liberal critique of trickle down would argue that market mechanisms cannot by themselves solve distribution, and that government policies therefore are needed. We argue for the need to go beyond a liberal critique of trickle down and stress how unequal distribution is built into the unequal production of the city.     

对于油浸式变压器绝缘电阻的分析研究

本文对大型变压器绝缘测量的方法、国标对变压器绝缘的要求进行了分析,研究了某大型火电厂内不满足国标要求的变压器的结构对变压器绝缘电阻、吸收比、极化指数的影响,提出变压器的绝缘状况综合分析方法。     

基于星载极化SAR数据的农作物分类识别进展评述

［目的］农作物播种面积信息不仅可为农情监测和作物估产提供重要的数据保障,还是国家制定粮食政策和经济计划的重要依据。快速、准确地获取农作物播种面积信息能为农业生产管理提供决策支持。极化SAR不受云雨天气的影响,在农作物遥感监测方面具有巨大的应用潜力,有效利用极化SAR数据进行农作物识别研究对促进雷达技术在国家农业遥感监测和农业供给侧结构性改革中发挥更大作用具有重要意义。［方法］以星载极化SAR技术的发展过程为论述主线,从单、双极化SAR数据,单、双极化SAR数据结合光学影像,全极化SAR数据三个发展阶段,对极化SAR数据在农作物分类识别中的研究与应用进行总结,并对比分析不同的识别特征、融合算法以及分类算法的优缺点。［结果］以往研究存在以下不足：当前研究多以识别水稻为主,对于难以识别的旱地作物研究较少;目前对旱地作物识别精度不高,平均识别精度不足85%;缺乏对不同作物散射机制及其随时相变化的研究,导致分类算法机理性不足,普适性较差。［结论］在今后的研究中,旱地作物散射机制的定量确定,如何利用散射机制及其变化来提高旱地作物遥感识别精度和普适性;目前分类算法大都是基于光学影像设计,如何利用SAR特殊的成像方式优化设计适用于极化SAR数据的分类算法,得到更高的分类精度;如何更好的跟光学遥感等多源数据（光学数据、GIS数据等）结合来提高精度,将成为未来极化SAR农作物识别中三个亟需重点解决的问题。     

INCOME INEQUALITY AND POLITICAL POLARIZATION AND FRACTURALIZATION:AN EMPIRICAL INVESTIGATION OF SOME EUROPEAN COUNTRIES

This paper investigates the relationship between economic inequality and the distribution of votes among political parties, namely political polarization and fracturalization. Economic inequality is captured by the Gini index, whereas new measures of political polarization and fracturalization are offered. This is the first paper to calculate political polarization and fracturalization indices by a methodology previously used for ethnic, religious and linguistic polarization and fracturalization. Empirical analysis uses data for 17 European countries and for three decades, 1980s, 1990s and 2000s. It is shown that increased income inequality increases political party polarization and reduces fracturalization and that political party polarization decreases with increased GDP per capita.     

Employment polarization and the role of the apprenticeship system

This paper studies the effect of apprenticeship training on technology adoption and labor market polarization. A stylized model with two key features is developed: (1) apprentices are more productive due to industry-specific training, but (2) from the firm׳s perspective, when training apprentices, technological innovation is costly since training becomes obsolete. Thus, apprentices correlate with slower adoption of skill-replacing technologies, but also less employment polarization. We test this hypothesis on German regions given local variation in apprenticeship systems until 1976. The results show little computer adoption and no employment polarization related to apprentices, but similar displacement of non-apprentices by computers as in the US.