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China's rapid urbanisation has created a special form of urban built environment known as 'village in the city' (ViC). Various governance approaches have been applied to redevelop ViCs, which are prevalent in big cities. However, owing to the specific conditions of ViCs and the diverse contexts of urban development within and across cities, those approaches remain largely case-specific and are hampered by a lack of guiding principles. This article presents a framework on modes of governance to understand the choice of and the differences between modes of governance as well as their positive and negative consequences for the regeneration of ViCs. Case studies of various types of ViC regeneration practices in Guangzhou and Shenzhen are used to illustrate the framework's application. The article concludes that new modes of governance that are interactive, inclusive and collaborative are called for to achieve the sustainable regeneration of ViCs.

In this paper, we extend recent discussions on the relationship with the host place of 'temporary' or non- hukou migrants in major Chinese cities through the lens of three psychological processes: familiarity, attachment and identity. The empirical analysis is based on fieldwork conducted in selected villages-in-the-city in Guangzhou. A mixed methods approach is employed. The findings highlight the emotional distance between temporary migrants and their urban milieu: while some become familiar with the city through their prolonged stay, very few establish attachment and identity. The analysis shows that the dominance of indigenous villagers is a major obstacle for migrants to develop attachment to the given village-in-the-city; moreover, perceived institutional discriminations negatively affect migrants' attachment to the city. The findings also corroborate a social constructionist perception of place identity: when place identity is legitimated and reproduced by the hukou system, it is difficult for migrants to challenge the hegemonic constructions of place and identity and to create their own narratives of identities.

Predicting the amount of combustion generated nano-scale particulate matter (PM) emitted by gasoline direct injection (GDI) is a challenging task, but immensely useful for engine calibration engineers in order to meet the stringent emission legislation norms. The present work aimed to link the in-cylinder combustion with engine-out nano-scale PM for the size range of 23.7 to 1000 nm diameter. Neural network with a single hidden layer using first 8 principal components of cylinder pressure was employed for training and predicting the number of nano-scale PM number count. Using a systematic computational approach and comparing its results with experimental data this work demonstrates that machine-learning approach based on neural network is sufficient for predicting engine out nano-scale PM count as a function of engine load and speed.

China's dramatic urban expansion has encompassed many peri-urban villages and turned them into so-called urban villages that provide a niche housing market for rural migrants for whom the formal housing market is unaffordable. Yet urban villages are very distinct from informal settlements elsewhere, because they are being developed by the original village community on collectively owned land. As these communities cannot sell their land and only build housing units for low-paid workers, the only way to make a higher return from their land is to increase its built intensity. This paper tests the hypothesis that the driving factors of this built intensity are analogous to factors that drive land prices in the formal city. Results of multivariate regression models of the built intensity of urban villages across the city of Shenzhen show a remarkable resemblance to hedonic models of land prices elsewhere. Location matters and access to employment, along with development constraints, are the most important determinants for the development of Shenzhen's urban villages.

AbstractUrban villages are widespread in many Chinese cities, providing affordable and accessible housing for rural migrants. These urban villages develop rapidly over time to create more housing units and accommodate increasing numbers of residents. This article provides systematic analyses of urban village development in Shenzhen in the period 1999–2009. It reveals that the development of urban villages was driven by the overall planning and urban growth of the city, which resulted in significant variation in urban village development at the city scale. Three distinct but overlapping phases were observed: expansion, densification and intensification. The growth of urban villages was spatially clustered and changes over time in the distribution of growth centres suggest the possible diffusion of migrant employment out of the Special Economic Zone into two outer districts. In the recent urban regeneration process, the pattern and trend of urban village development is shown to contradict the city's urban village redevelopment programmes. This not only helps to explain the slow progress of the policy implementation, but also implies severe risks of jeopardizing the migrant housing market in certain urban sections.RésuméDes villages urbains sont dispersés dans de nombreuses villes chinoises, procurant un habitat accessible et économique aux migrants ruraux. En essor rapide, ces implantations multiplient les logements à faible loyer et accueillent un nombre croissant d'habitants. Le développement des villages urbains de Shenzhen entre 1999 et 2009 a fait l'objet d'analyses systématiques: il a été induit par la croissance et l'aménagement d'ensemble de la ville, qui ont abouti à une importante variation de ce phénomène à l'échelle urbaine. On distingue trois phases, en partie superposées: expansion, densification et intensification. La croissance des villages urbains s'est concentrée dans l'espace, et les changements progressifs dans la répartition des pôles de croissance suggèrent la dissémination possible de l'emploi des migrants vers deux quartiers situés hors de la Zone économique spéciale. Il est montré que, dans le cadre du récent processus de régénération urbaine, le schéma et la tendance du développement de ces villages dans Shenzhen vont à l'encontre des programmes de réaménagement des villages urbains. D'une part, ces résultats permettent d'expliquer la lenteur dans la mise en œuvre des politiques publiques; d'autre part, ils suggèrent que, dans certaines zones urbaines, le marché du logement des migrants pourrait connaître une crise grave.