Xuan Sun

Xuan Sun
Nankai University | NKU · Urban Management

About

24
Publications
5,508
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134
Citations
Introduction
Additional affiliations
July 2013 - May 2015
Nankai University
Position
  • Lecturer

Publications

Publications (24)
Article
China has experienced an unprecedented rate of urbanization in recent decades. As a city with strong political and economic influences in the southwest of China, Chongqing is a typical example of rapidurban development in this period of time. To study the land cover changes and urban expansion of Chongqing, Landsat images from 1999 to 2018 were sel...
Article
Full-text available
Satisfying the growing care demands of the elderly has become a major policy issue under the trend of rapidly aging of the population, especially in developing countries. Although the market-oriented transformation on the supply side is a sustainable way to cope with the pressing demands of elderly care in the long term, the conflict between privat...
Article
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Air pollution can have adverse impacts on both the physical health and mental health of people. Increasing air pollution levels are likely to increase suicide rates, although the causal mechanisms underlying the relationship between pollution exposure and suicidal behaviour are not well understood. In this study, we aimed to further examine the spa...
Article
Objectives Some studies reveal that socio-economic status, behavioural factors, accessibility to supermarket or food store, are associated with the prevalence of obesity and overweight. In this study, we aimed to examine to what extent socio-economic, behavioural and built environment characteristics can contribute to spatial disparities in adult o...
Article
Full-text available
Recently, Uber released datasets named Uber Movement to the public in support of urban planning and transportation planning. To prevent user privacy issues, Uber aggregates car GPS traces into small areas. After aggregating car GPS traces into small areas, Uber releases free data products that indicate the average travel times of Uber cars between...
Article
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To address the low performance of health care service delivery in the half-market system, the Chinese government has begun to advocate the medical alliance (MA) recently. Instead of strict regulations on the procedure of diagnosis and treatment, flexible resource sharing among medical institutions of different grades inside each MA is encouraged. B...
Article
Full-text available
Nowadays, many big cities are suffering from heavy air pollution and continuous haze weather. Compared with the threat on physical health, the influence of haze on people’s mental health is much less discussed in the current literature. Emotion is one of the most important indicators of mental health. To understand the negative impact of haze weath...
Article
Full-text available
Data model is the basis of all the functions of geographic information system. As the land use structure has become more and more complicated in cities, the traditional geometric model are not able to satisfy the increasing demands of precise urban form recognition and space management. Against the shortcomings, we propose to construct a multilevel...
Article
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Under the unprecedented wave of urbanization and pace of economic development, the living conditions of residents have been unevenly changed in Chinese cities. To understand the diversified living conditions in Chinese urban neighborhoods from the supply-side point of view, new spatial and residential data were gathered to investigate the social in...
Article
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3D building models are an essential data infrastructure for various applications in a smart city system, since they facilitate spatial queries, spatial analysis, and interactive visualization. Due to the highly complex nature of building structures, automatically reconstructing 3D buildings from point clouds remains a challenging task. In this pape...
Article
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Submarine pipelines are of great importance to resource delivery in the oceans, but they are sensitive to a wide variety of damage and defects. In submarine resource development, life cycle monitoring is the most effective solution to ensure normal operation of pipelines, and periodic surveying and inspection are adopted as the main maintenance tas...
Article
Full-text available
Structure is one of the most important properties of man-made objects, and it is beneficial for a number of applications. In this paper, we propose an effective method to recognize the 3D building models’ compositional structures, which represent the basic knowledge of human beings on the shape formation of the models in 3D space. To overcome the s...
Article
Due to the scouring of bottom turbulent currents, the submarine pipelines on the soft seabed become exposed or unsupported so that they will be instable. The conventional methods for inspecting the submarine pipelines are inadequate and unprecise to reveal the actual status of submarine pipelines. It makes it difficult to analyze the safety of the...
Article
Full-text available
Based on acoustic survey, an integrated method for inspecting the unburied status of submarine pipeline is proposed. A Multi-Beam Bathymetric System (MBS) with dual-sonar sensors and a side-scan sonar system is employed in this method, and analyzing and optimizing of system parameters are implemented for efficient and accurate inspection of the unb...
Article
The complexity of building models directly affects the application efficiencies of 3D urban maps. To address the challenges of building models with various structures, we propose a structural simplification method in this paper. The geometric structures of building models are classified into three categories: embedded structures, compositional stru...
Article
To avoid the incapability of existing 3D model segmentation methods in recognition of structural characteristics of buildings, a structural segmentation method for 3D building models based on voxel analysis is proposed. The method firstly constructs distance fields by level in building models through voxelization and inner distance parameter calcul...
Article
Automated constructing multi-resolution 3D building models is an important issue in the contexts of virtual reality, progressive transmission and 3D GIS. This paper proposes a novel method to generate multi-resolution representations of the 3D complex building model with features preservation based on cell clustering. The quadratic error function i...
Article
Due to their limited expressive capabilities and computational resources, typical mobile devices are still not appropriate for real-time 3D navigation, in particular when widespread building models in the urban environments have a very detailed geometry. In order to better balance the capability of mobile devices and the perception demands of the u...
Conference Paper
Because of the limited computational resources and narrow wireless network bandwidth, it's a great challenge to realize the similar effect of smooth roaming operations in D environment as Google Earth on the platform of mobile devices. Based on the researches of the characteristics of embedded systems, we used technologies of roaming step length co...

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