Spatial Identification and Redevelopment Evaluation of Brownfields in the Perspective of Urban Complex Ecosystems: A Case of Wuhu City, China

Rapid industrialization and urbanization in China have led to a rapid increase in the number of brownfields, however there is a lack of identification of the spatial extent of brownfields in cities and accurate assessment of brownfield redevelopment. Based on the relationship between brownfields and urban complex ecosystems, this paper defines brownfields in China and constructs a comprehensive evaluation index system including socio-economic and ecological subsystems. Using Wuhu City as empirical evidence, 19 brownfields were identified using remote sensing data and field surveys. Based on the detection of soil contaminants in brownfields, a fuzzy integrated evaluation method was used to suggest their redevelopment direction. It is found that the government’s planned land use types and the brownfield redevelopment evaluation results match to a large extent, but social, economic and ecological environmental factors should be more fully considered. At the same time, the identification and redevelopment of brownfield sites in the city as a whole need to be carried out by the government’s professional forces in order to obtain more effective and scientific conclusions.

Government Competition, Land Supply Structure and Semi-Urbanization in China

Population urbanization is crucial to establishing a harmonious society. However, the phenomenon of population semi-urbanization is becoming an issue of ever-increasing concern in China. More and more immigrants from rural areas work and live in the city, but their roots remain in the rural area. This paper aims to analyze the influence mechanism of government competition on population semi-urbanization through land supply structure. The study’s theoretical analysis and empirical analysis results are based on the panel data of 105 key prefecture-level cities in China from 2007 to 2017. The results demonstrate that: (1) land finance and land-motivated investment engendered by government competition lead to an imbalance in the land price structure, further increasing the rate of population semi-urbanization; (2) land finance does not lead to population semi-urbanization through the land area structure; and (3) land-motivated investment aggravates the imbalance in the land area structure, further leading to population semi-urbanization. It is found that government competition in terms of achieving performance indicators affects population semi-urbanization by adjusting the land supply structure. Efforts should be made to achieve the coordinated development of urbanization, given that the increasing rate of population semi-urbanization will almost certainly aggravate social instability.

Sustainable Transformation of Resettled Communities for Landless Peasants: Generation Logic of Spatial Conflicts

Urbanization in China has resulted in serious conflicts. Landless peasants are resettled between urban and rural areas in transitional communities. where their rural lifestyles often lead to spatial conflicts. We proposed a conceptual model to provide theoretical guidance for the governance of spatial conflicts and the sustainable transformation of resettled communities. Using field observations and semi-structured interviews, we examined 10 resettled communities in Hangzhou, China. The use of grounded theory to code the interview texts yielded 71 initial concepts and 22 categories that we then refined into six main categories: community physical environment (e.g., quality of private housing), community communication environment (e.g., heterogeneity of community population), landless peasants’ risk perceptions (e.g., impacts on social psychology), community governance capacity (e.g., trust in community’s self-governing organizations), residents’ space perceptions (e.g., awareness of space rights), and space competition behavior (e.g., fighting for public space). Finally, we applied social combustion theory to construct a logical relationship between the core category and main categories. The results show that changes in the physical and communication environments are the root elements (“combustion substances”) of spatial conflicts; the driving factors are landless peasants’ risk perceptions and community governance capabilities; direct elements (“ignition temperature”) are residents’ space perceptions and space competition behavior. Strategies for sustained transformation in resettled communities should prioritize gradual transitions of community space, improve support mechanisms for landless peasants, optimize community governance mechanisms, and cultivate awareness of community rules. This study aids the understanding of the inner mechanism for the sustainable development of resettled communities and has implications for other countries and regions in similar contexts.

Construction and Analysis of Intelligent Transportation Based on Computer Network Technology

With the continuous development of urbanization in China, urban traffic problems are gradually highlighted. In the future, intelligent transportation system will be the most important method to solve the demand of urban traffic. The realization of intelligent transportation system requires real-time perception and monitoring of road traffic conditions. Fortunately, with the continuous development of mobile communication, satellite positioning, Internet of Things, big data and other technologies, GNSS, RFID, microwave, geomagnetic, video and other acquisition methods have been widely used in information perception in the field of urban traffic. Based on the concept of intelligent transportation, this paper constructs an intelligent transportation system based on Internet network technology, which has a certain guiding significance for the construction of intelligent transportation under computer network technology.