Cheng Wei

Linpan in Chengdu Plain, a distinctive form of dispersed rural settlement on the Chengdu Plain, is composed primarily of traditional rural dwellings embedded within woodlands environments. These settlements play multifunctional roles related to agricultural production, daily life, ecological sustainability, and the preservation of folk culture, thereby holding significant ecological and cultural value. In recent decades, rapid urbanization has profoundly impacted the spatial patterns, ecological environments, and livelihood systems of Linpan in western Sichuan, posing severe challenges to their preservation and development. To investigate the extent and nature of these changes, this study examines the spatiotemporal evolution of Linpan in Chengdu over five time periods from 1980 to 2020, employing both macro- and micro-scale analyses. Settlement types were classified based on their transformation trajectories, and representative cases were selected to identify and interpret the key driving forces behind these changes. The results indicate that: (1) at the macro level, Linpans have undergone a clear transition from small-scale, widely distributed, and irregularly shaped patterns to more centralized, aggregated, and standardized spatial configurations, particularly in the peri-urban areas of Chengdu; (2) at the micro level, the internal composition of Linpan has changed substantially, with a marked decline in woodlands coverage. The original integration of buildings and trees has shifted towards a spatial arrangement characterized by peripheral and fragmented vegetation; (3) Changes in production methods have prompted the spatial restructuring of Linpan settlements, transitioning from uniformly dispersed arrangements to clustered formations along road-adjacent resource points. Concurrent population and housing migration has reduced the total number of Linpan, while individual settlements have increased in size and density. Additionally, planning and construction policies have guided the morphological transformation of Linpan from organically evolved forms to geometrically regular configurations.

The protection, renewal and revitalization of traditional villages are major practical issues for achieving rural revitalization and Chinese-style modernization in China. As a popular field of interdisciplinary research, it systematically explores theoretical logic and practical paths. Twelve experts from fields of geography, architecture, planning, finance, culture and tourism, and management were invited for in-depth interviews and dialogues, spreading to top-level institutional design, protection, control and constraints, departmental management and enterprise operation and maintenance, talent and multi-subject intervention, and the empowerment of new technology iterations. Based on expert insights, the protection and revitalization of traditional villages in China in the New Era need to focus on the following key points: (1) Taking top-level institutional design as the foundation. It is urgently necessary to safeguard the main rights and interests of villagers through a mechanism that links property rights confirmation with income. Resource endowments are relied upon to implement precise classification of industrial strategies to build a multi-party collaborative governance framework and balance the integration model of culture and tourism. (2) Taking protection, control and restraint as the bottom line. Based on the dialectical relationship between protection and development, flexible guidance and control mechanisms and negative list management have been practiced to balance the demands of heritage protection and improvement of people's livelihood. (3) Governance coordination and financing innovation serve as the driving forces. It is necessary to clarify the boundaries of responsibilities and collaborative processes among multiple departments to distinguish the intervention logic of various types of enterprises. Through innovative approaches such as special bonds, green credit, protection funds and "whole village asset package" financing, the bottleneck of scattered property rights and long-term returns has been broken. (4) It is guaranteed by the rooting of talents and multi-party governance. The core lies in the comprehensive introduction mechanism, industrial platform, governance model and long-term incentive mechanism to reconstruct a virtuous cycle of symbiotic development between talents and villages. Technical experts should be incorporated into the decision-making system to achieve collaborative governance. (5) Supported by technological empowerment, digital records, open cloud platforms and artificial intelligence technologies are adopted to achieve efficient spatial information acquisition, dynamic monitoring and early warning, as well as remote expert guidance. The predicament of insufficient technical support in remote villages is expected to be resolved. Overall, it is necessary to achieve a balance between the protection of traditional village heritage and sustainable renewal and revitalization through a systematic linkage of institutional innovation, flexible control, multi-party collaboration, talent cultivation, and technological empowerment.

Driven by rapid urbanization, many traditional villages are undergoing a dynamic process of spatial alienation and functional transformation. Research on the typological differentiation of traditional villages and the formulation of guidelines for their regeneration and revitalization is of significant academic and practical importance. Taking 81 traditional Chinese villages in the Pearl River Delta as the research object, this study uses a combination of quantitative index evaluation and qualitative case analysis to reveal the differentiation types, spatial evolution characteristics, and strategies for regeneration and revitalization. The findings reveal that: (1) In terms of type differentiation, traditional villages in the study area have been divided into two types—heterogenization and vacancy—under the dual influences of urban expansion and the siphoning effect of resources. These villages are gradually undergoing a shift towards vitality in the process of urban-rural integration. (2) In terms of spatial characteristics, heterogeneous traditional villages are characterized by varying degrees of fragmentation and separation between the natural ecological base and the built environment. Vacated villages experience varying levels of decay and damage to their historic spaces due to population decline. In contrast, revitalized villages have formed differentiated spatial organizational patterns through spatial remediation, the introduction of new industries, and functional replacement. (3) In terms of regeneration and revitalization strategies, heterogeneous villages should integrate ecological corridors with localized cultural heritage restoration to achieve spatial reconstruction. Vacated villages should adopt a progressive revitalization model, involving "intelligent monitoring—tiered intervention—regeneration". Revitalized villages need to strengthen institutional innovation, encourage villager participation, and implement industry regulation to promote high-quality renewal and revitalization. This study constructs a classification and identification system for traditional villages driven by rapid urbanization, expanding the theory of vernacular heritage preservation under the dynamic interaction between urban and rural areas. It aims to provide valuable insights for the protection, renewal, and revitalization of traditional villages in the New Era.

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With the advent of the stock era, the development of depot cover at home and abroad is becoming more and more mature. However, for a long time, the development of domestic depot cover has been based solely on the development and construction of individual units based on economic benefits, and there is a lack of overall planning and rigorous comprehensive development value assessment and demonstration at the municipal level, resulting in problems such as unclear functional positioning, immature development time, and economic and social returns that do not meet expectations in some depot cover development projects. Therefore, this paper takes a total of 24 metro depots existing or under construction in Guangzhou as an example, constructing a development value evaluation model for the development of depot covers. After constructing model, depot covers relative development value is evaluated by economic benefits and development conditions. Further, according to the actual construction planning of these depot covers, corresponding planning decision-making suggestions are given in order to provide a reference for the development of depot cover in Guangzhou and other parts of China.

Natural ventilation is one of the vital means for passive energy-efficient design in green buildings. As a widely used building façade, the perforated plate is mostly utilized for appearance decoration, noise absorption, and sun shading, but its impact on the natural ventilation effect has rarely been paid attention to. In this study, the influence of the perforation rate, the perforation size, and the perforation shape on the flow coefficient of the perforated plate were simulated using the commercial CFD software Fluent, and the correlation between the flow coefficient and these geometric parameters was then regressed. The results show that the flow coefficient of perforated plate increases with the increase in perforation rate, which is slightly greater than that of ordinary building openings, and the corresponding flow coefficients of different holes rank as circle > square > triangle under the same conditions. The flow coefficient increases with the increase in the perforation size, and this effect is greater when the size is small. In addition, the flow coefficient is less affected by the size of round holes compared to triangular and square holes. The regression model indicates that both the perforation rate and the perforation size have a considerable positive influence on the flow coefficient, while the square and triangle holes have a negative influence on the flow coefficient compared with the circular hole. Moreover, the geometric parameters of perforated plates that have the greatest influence on flow coefficient are perforation rate, perforation shape, and size, in descending order.