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Nanotechnology has great theoretical and application value. Nanomaterials have the characteristics of radiation, absorption, sterilization, and adsorption. Numerous studies have shown that nanotechnology plays an important role in protecting and planning public green spaces. In recent years, with the continuous improvement of Macau's status as an international city, the development of tourism has led to the northward shift of the centre under the "spillover effect" of the residential space in the historical city. As a typical high-density community, the Macau Peninsula has a serious shortage of public green space. This paper selects Macau's community public green spaces as research objects, takes environmental perception as the evaluation perspective, takes the supply capacity of public green space and the degree of demand of urban residents as evaluation indicators, as well as the subjective and objective factors that affect the layout of public green space, combined with relevant theories to construct A complete set of comprehensive index system. Based on the analysis results, from the attractiveness and utilization rate of public green space, the layout of public green space, urban road traffic network, land use planning, nanotechnology materials, etc., to explore effective ways to promote the sustainable development of high-density cities in Macau. [ABSTRACT FROM AUTHOR]

High activity is an important manifestation of the stable development of urban social economy. Quantitative research on urban development based on the geographical label perception of urban vitality is a new technical means and way to study urban vitality. In this paper, points of interest and Weibo check-in geographic markers are used to analyze urban vitality indicators and urban vitality distribution patterns. Through the application of different indexes, the ordinary linear regression and spatial autoregressive models between urban vitality and built environment are established to explore the factors that affect urban vitality. Results of the research show that interest points and social media check-in data can better indicate urban vitality. The urban vitality of the Macao Special Administrative Region is mainly affected by the density of land use, buildings, and public transportation. [ABSTRACT FROM AUTHOR]

Taking the living space of the Historic Centre of Macao as an example, by field measurement of the midweek and weekend data of people and traffic flow in major blocks with remote sensors technology, this paper comprehensively analyzes the association and impact of multi-level spatial networks on the urban vitality of historic blocks, evaluate and verify the close correlation and goodness of fit between the analysis of spatial syntax and the field test data. This paper selects three levels: metropolitan level, block level and neighborhood level, and uses information sensors to conduct correlation analysis on the number of standardized stores and spatial syntactic parameters for the living space in the Historic Centre of Macao, verifying the role and effect of integration and through a degree in analyzing multi-level spatial time and space. In the subsequent development of the Historic Centre, the service sector with a small radius should be protected and renewed, and the guidelines and orientation for street renewal and revitalization should also be enhanced with the help of information actuators. • The paper analyzes the association and impact of multi-level spatial networks on city. • Analyze standardized stores and spatial syntactic parameters of living space of Macao. • Guidelines and orientation for street renewal and revitalization should be enhanced. [ABSTRACT FROM AUTHOR]