An in-depth exploration of the coupling and coordination relationship between urban social vulnerability and human activity intensity can provide a scientific basis for urban sustainable development, planning optimization, and policy decisions. Based on multi-source remote sensing data and social-economic statistics in 2021, Zhengzhou’s social vulnerability and human activity intensity were quantified. Subsequently, a coupling coordination degree model was applied to reveal the extent of coordination between these two factors. Finally, the geographical detector was used to analyze the impact of driving factors on the degree of coupling coordination. Results indicated that the spatial distribution pattern of social vulnerability and human activity intensity in Zhengzhou exhibits a gradual attenuation trend from the center toward the periphery, indicating a strong correlation between the two factors. The regions with high coupling coordination degrees were primarily concentrated in the central region. The total output value of the primary industry, patch aggregation index, per capita cultivated land area, and human activity intensity were identified as key drivers affecting changes in coupling coordination degree. These factors exhibit evident synergistic enhancement effects, resulting in comprehensive impacts on the spatial distribution of coupling. This study can provide a reference for urban development decision-making.

The thermal comfort of different shaded spaces in parks varies noticeably, and it is also a key factor influencing crowd gathering. Longzi Lake Beach Park in Zhengzhou was used as a study area in this research. For analysis, a thermal comfort index for three different space types (unshaded, semi-shaded, and fully-shaded) and a crowd aggregation index were used. The results show that during autumn, visitors are sensitive to the thermal comfort in different shaded spaces, and that the location of the playing field differs significantly. Air temperature and solar radiation are the two factors that influence tourists’ thermal comfort the most. For the first time, a regression relationship between physiological equivalent temperature (PET) and mean thermal sensation vote (MTSV) is established in different shading spaces. It clarified the thermal comfort of tourists in different shaded spaces. PET and crowd aggregation index show a clear correlation. The correlation between the MTSV and crowd aggregation density increased with the increase in shade area. For the first time, the relationship between thermal comfort and crowd gathering in different shaded spaces in parks was analysed. The research is beneficial to improving the scientificity of the construction of the park’s thermal environment, and providing people with more comfortable outdoor space from the perspective of shading.

Urban morphology has been empirically demonstrated to be self-organized and can be quantified by fractal dimension. However, the spatial variation rule of fractal features at the sub-zone scale has yet to be uncovered, as well as the relationship between fractal dimension values and road network or land-use patterns. In this study, the urban area is partitioned into 158 grid units, with subsequent calculations conducted to determine the fractal dimensions (using 2D box-counting and 3D voxel-counting methods), road network characteristics, and land-use patterns within each individual unit. The pattern of how architectures fill into the 2D or 3D embedding space at the grid level is revealed. Moreover, the spatial relationship between the road network, land-use, and their impacts on the local architectural layout is elucidated by employing MGWR, a model that incorporates the principles of fitting localized spatial regression. The results are as follows: (1) urban morphology follows fractal laws at a sub-zone scale, both in a 2D plane and 3D volume; (2) the filling degree of architecture is high in the urban center but low in the periphery areas; (3) the selected variables fit well with the regression models; (4) there is spatial heterogeneity regarding the influence of each factor. The research findings provide valuable insights into the theoretical relationship between urban morphology and the composite structure of road networks and land use. This facilitates identifying crucial areas and priority directions for urban renewal construction, as well as optimizing architectural design to improve efficiency and functionality.

In order to improve the study of the spatial form of villages, fractal theory is used to analyze the plane and facade of Maling Village, Changdai Town, Mengjin County, Luoyang City, Henan Province, China. The results show that the village facade and plane spatial shape of Maling Village have obvious fractal characteristics and the fractal dimension can be used as an important index to evaluate the plane and facade shape of the village. The fractal dimension of each land use type is between 1.2415 and 1.7443. The stability index of land use types in the village follows the order of village construction land > cultivated land > road > garden land > woodland > grassland. The research results can provide decision-making information for the rational use and planning of village land.

Fan, Q.; Liang, L.; Liang, F., and Sun, X., 2020. Research progress on coastline change in China. In: Zheng, C.W.; Wang, Q.; Zhan, C., and Yang, S.B. (eds.), Air-Sea Interaction and Coastal Environments of the Maritime and Polar Silk Roads. Journal of Coastal Research, Special Issue No. 99, pp. 289–10. Coconut Creek (Florida), ISSN 0749-0208.A coastline is an ecologically sensitive area at the land–water interface. Coastline change has an important impact on regional ecology, economy, and society. China has a long coastline and its coastal zone is among the fastest developing regions in the world. An effective understanding of Chinese coastline changes can aid sustainable development in China and surrounding areas. In this paper, we reviewed the literature of coastline changes in China through the end of 2018. Through literature analysis, the coastline change research in China can be divided into three stages: a start-up stage, an exploration period, and a developmental period. Ancient maps, traditional actual trace measurements, ancient sea level markers, remote-sensing images, and Light Detection and Ranging technology are the main data sources of coastline research. From the research content, the coastline change literature in China mainly focuses on the analysis of space–time changes and coastline driving forces. There is also limited literature on coastline change prediction, which mainly refers to the shape and location of coastline change. The next stage, the relationship between coastline change and the environment, is the focus of future research. This study provides a relatively comprehensive review of coastline changes in China that may have a certain significance for the study of these changes in China and perhaps the world. It can serve as a basis for developing scientific and reasonable policies for sustainable development in coastal zones.

Urban spatial form is a significant reference to getting to know cities and running the cities. The fractal theory is an effective means to quantify urban spatial form. Taking the buildings in the outer ring of Zhengzhou City as the research object, the basic architectural models are built by extracting their forms. The research site is subdivided into 199 regions. The distribution of architectural forms in Zhengzhou is analyzed by fractal theory and spatial autocorrelation from the perspective of two-dimensional(2D) and three-dimensional(3D). The results indicate that the architectural layout of Zhengzhou has distinct fractal characteristics; Both global spatial autocorrelation and local spatial autocorrelation show significant positive correlations; There are obvious spatial differences in architectural space forms in different regions. The refined grid analysis strengthens the understanding of the urban spatial structure and development rules in more detail. The study promotes the refinement and visualization of fractal theory effectively and improves the depth of urban spatial form cognition.