Abstract Based on the perspective of the keyword co-word network, firstly, the total number and scale of keyword relationships are measured. Secondly, the centrality of the keyword-co-word network is analyzed, including point degree centrality, point middle centrality, point proximity centrality, and point feature vector centrality. Thirdly, the k-kernel analysis of the keyword-co-word network is carried out. Finally, some meaningful research conclusions at the forefront of international eco-city research from 1961 to 2011 are drawn.

Abstract This paper puts forward a proposal for a theoretical methodology that combines various discourse analysis strategies to explain the process of public policy from the perspective of discourse. Based on this approach, the formulation of the urban green space policy implemented in Mexico City from 2006 to 2012 was reviewed. The cases analyzed show how interdisciplinary and cross-scale methods can strengthen the understanding of the complexity of urban and environmental discourse and prove the mechanism theory on which the concept, category, and description of public action legitimacy are based.

Abstract Since ancient times, exploring a reasonable relationship between urban space and nature has been the tireless pursuit of mankind. Since the 21st century, ecological thought has been deeply rooted in the hearts of the people. Today, when the ecological city is gradually recognized by people as the ideal development model of the city, emphasizing the urban spatial model integrated with nature and building a scientific and reasonable urban spatial structure system has gradually become the research hotspot of urban scholars and builders at home and abroad. From the theoretical basis of urban spatial structure research from the perspective of ecology, the origin of academic thought has a long history, but it lacks a systematic established model, so it is very necessary to summarize it.

Abstract Through a theoretical review, the potential application of the genetic protection concept in urban green spaces was discussed. Usually, urban green space is regarded as a part of urban real estate, and its use is often related to the aesthetics of the city. Its planning does not consider technical or scientific aspects. In addition, the study of cities ignores the genetic conditions of species in a generally hostile environment. It is suggested to carry out genetic protection research in order to improve the quality of biodiversity in urban green spaces and achieve greater functional purpose.

Abstract Since the 19th century, the process of industrialization and urbanization in Britain has not only created huge material wealth but also had heavy negative effects on human society. Among them, air pollution is one of the costs and has become a major obstacle to the construction of an ecological city. London first analyzes and treats the causes of smoke and air pollution, and then treats the sulfur dioxide and lead pollution in automobile exhaust. Since the new century, it has focused on the monitoring and treatment of nitrogen dioxide and inhalable suspended particles. From air legislation to the mayor of Greater London’s air quality strategy, from congestion fees to low emission areas, from green travel represented by bicycles to the treatment of dust on the construction site streets, it shows that the London municipal government’s treatment of air pollution is becoming more and more in-depth and comprehensive, and the means to control air pollution are also innovating.

Abstract This work is carried out within the framework of sgcyt approved research project “environment and sustainability in architecture and cities” (PI c007-2013). It aims to explore the planning of an intermediate city with innovative concepts or optics, understand its relationship with natural physical support, and find mechanisms to solve a large number of complex aspects of urban problems after appropriate diagnosis. Taking urban underground engineering as an example and based on the actual work of A5 UPC, this paper makes a useful reference. It identifies four categories and proposes planning guidelines based on landscape environmental standards as the main tool for urban improvement.

Abstract The processes of urbanization and population growth lead to the fragmentation of biological habitat and the loss of biodiversity. It is of great significance to use effective models and indicators to evaluate landscape connectivity and construct a green space network for habitat restoration and biodiversity conservation. Taking Fengtai District of Beijing as an example, firstly, the optimal distance threshold of green space construction suitable for biological migration is discussed by using the connectivity index based on graph theory, and the source patches are selected according to the evaluation results of landscape connectivity. Secondly, the resistance surface is constructed by using the minimum cost path model, and the potential connection path of species migration is determined by the Linkage Mapper tool. Finally, according to the relative importance of patch and corridor in the quantitative source of current density, the “pinch” area, which is very important to species migration, is identified, and the model recognition results are compared with the empirical observation results of the remote sensing satellite map and bird abundance. The results showed that the ecological base of green space in the western part of the study area was good, which provided the main habitat for species, and the patch fragmentation of green space in the central and eastern regions was serious, so it was necessary to increase urban green space as a stepping stone for species migration in pinch areas. The circuit model focusing on species diffusion is introduced in the study, which makes up for the lack of urban green space network construction methods at the level of biodiversity conservation, clarifies the present situation of habitat quality and the future development of green space networks in Fengtai District of Beijing, and provides scientific reference for the optimization of regional green space patterns and biodiversity conservation planning strategies.

Abstract Biodiversity is the immune system of river ecological health. Restoration and improvement of urban river biodiversity and the return of life to rivers are the main goals and important tasks of river ecosystem restoration. Taking the Wuyuan River located in Xiuying District, Haikou City, as the research object, based on the ecological environment and biodiversity background before river restoration, the design technology and practice of Wuyuan River ecosystem restoration were discussed, and four strategies of ecological restoration were put forward: 1) River ecological restoration—three-dimensional ecological space reconstruction. 2) Riparian ecological restoration—flexible ecological riparian design. 3) River-wetland synergy—River-wetland complex construction. 4) Multi-functional habitat restoration—life landscape river reconstruction. Based on the goal of biodiversity improvement, the innovative path and mode of urban river ecosystem restoration were explored from the perspective of life-landscape river restoration. Finally, the biodiversity of the Wuyuan River after restoration was evaluated. The results showed that the habitat types of the Wuyuan River after restoration were diverse, the habitat quality was good, and the improvement effect of biodiversity was obvious. The practice of ecological restoration shows that urban river ecological restoration aimed at the improvement of biodiversity is more conducive to the overall protection of urban river ecosystems and the optimization and improvement of river landscape quality.

Abstract According to the design principle of evaluation index, combined with the requirements of system operation efficiency and benefit, the development of eco city and eco industrial park, this paper puts forward the evaluation index system of waste logistics system in the park with 22 secondary indexes from the five aspects of system input, system capacity, operation efficiency, treatment efficiency and environmental performance, reasonably determines the index weight by using analytic hierarchy process, and selects 12 industrial parks as the object for example analysis, and use the proposed index system to carry out fuzzy evaluation and obtain the input and evaluation results of fuzzy evaluation. Then, according to the fuzzy evaluation process, build a three-layer BP neural network, train the BP network with the input and output of fuzzy evaluation, and obtain the BP network that can perform fuzzy evaluation. The example analysis shows that the evaluation results of the BP network for each park are the same as those of fuzzy evaluation. It is a convenient, reliable, and effective scientific tool to evaluate the performance of the waste logistics system in the park.

Abstract The city of Quanzhou was investigated by CVM and a logistic model. The results show that the average willingness to pay is RMB 110.7/year. Six factors, including the length of registered residence, the length of residence, the income of the residents, the degree of understanding of the construction of Quanzhou’s ecological civilization city, and the influence of the public on the ecological civilization’s influence on their own lives, have a significant impact on the willingness to pay. Gender, age, and occupation have little effect on willingness to pay.

Abstract The global, large-scale urbanization of the territory is one of the most important ecological phenomena today. The standards used in urban growth are crucial to the protection of biodiversity and affect the provision of a reasonable quality of life for the urban population. Contrary to the views of many biologists and other scholars, cities are barren environments. Contrary to nature, urban ecology is a necessary interdisciplinary science. Recent developments show that cities are heterotrophic ecosystems that need to be planned in a way to reduce their impact on the biosphere and improve their ability to maintain biodiversity.