Ecosystem theory provides a new perspective for studying the development of the architecture engineering and construction (AEC) industry in the age of information and communication technology (ICT). As an extremely ICT innovation, building information modelling (BIM) not only brings technical benefits to the AEC industry, but changes the innovation paradigm of the AEC industry towards an innovation ecosystem, which improve productivity and sustainability throughout the project life cycle. This article contributes to innovation ecosystem theory by exploring the structure of the BIM ecosystem and deriving its cultivation path. Then, as the leading city in China for developing BIM technologies, Shanghai was selected as the case study to elaborate on the cultivation path of the BIM ecosystem. The results indicate that three layers identified in the structure contribute to the understanding of the boundaries, units, and analytical focus of the BIM ecosystem, with the BIM platform being the core layer. This topology structure, with the BIM platform as the hub, promotes interdependency and symbiosis among participants in the cultivation of the BIM ecosystem, supporting the birth, expansion, maturity, re-innovation (or extinction), and sustainable development of the BIM ecosystem. This research complements and extends literature on the BIM ecosystem, and provides implications as to the construction, cultivation, and sustainability of BIM ecosystems for emerging economy firms.

Purpose: This study aimed to formulate multi-level key performance indicators (KPIs) to systematically measure the performance of modular construction (MC) supply chains at the process, project, organization, and industry levels, as demonstrated in the case of modular integrated construction (MiC) for buildings in Hong Kong and the supply chain in the Greater Bay Area of China. Design/methodology/approach: This study first conducted a literature review to identify the initial indicators for MC supply chain performance measurement and verified them through three focus group meetings and twelve interviews. Based on the refined list of indicators, a questionnaire survey was carried out to determine the KPIs. Finally, this study organized a research workshop to consolidate and validate the findings. Findings: Through scale ranking and fuzzy set analysis, a total of 15 KPIs were identified for measuring MC supply chain performance, including “manufacturability of module design,” “stakeholder satisfaction,” “MiC experience of supply group,” “assurance of supply,” “efficiency of approval procedures,” “end-user acceptance” and “incentive effectiveness.” The KPIs highlighted the pivotal domains that warrant attention and the necessity of multifaceted endeavors for MC supply chain enhancement. Originality/value: This study contributes a multi-level measurement framework with KPIs to the literature on MC supply chain measurement. The efficacy of the mixed approach for formulating KPIs was demonstrated, providing a reference for other economies. Also, the multilevel KPIs help the government monitor the overall maturity of the entire supply chain network and facilitate the stakeholders directly involved in value creation activities to optimize process operations and strengthen organization capability.

This paper selects CO₂, formaldehyde and VOC as pollutants, and dynamically tests the concentration of CO_2,formaldehyde and VOC in different ventilation modes, different seasons, different road conditions and different purification methods to explore the change of pollutant concentration and its influencing factors under different working conditions. According to the dynamic test results, more representative formaldehyde was selected. The breathing height Z=0.75m section was used as typical section. Simulation conditions are divided into: different air supply speed, different air supply temperature. The results show that the concentration of formaldehyde / VOC is the highest in summer, the lowest in excessive season, higher in crowded road conditions, the highest of CO₂ in excessive season and the lowest in summer.Concentration of pollutants is relatively ideal in open-window ventilation and air conditioning external cycle. The use of activated carbon and vehicle purifier in the vehicle can play a certain purification effect, among which the purification effect of vehicle purifier is better. Higher air supply speed and lower air temperature will reduce formaldehyde concentration.

为了实现国家提出的乡村振兴战略，大理云龙县诺邓村需要着重开发文化产业。依据田野调查的归纳，诺邓村具有白族聚落和明清建筑群、白族服饰等工艺品、洞经古乐民俗活动和诺邓火腿等核心的文化资源，并且相关的文化产业得以初步开发。在此基础上，利用 SWOT 分析模型，对诺邓村文化产业发展进行分析，得出保护与开发并行、发展新业态、吸引高素质人才设计文创产品、拓宽传播渠道、引入数字经济、设立反馈机制和实现美丽乡村建设等发展策略。In order to realize the national strategy of rural revitalization, Nuodeng Village in Yunlong County, Dali needs to focus on developing cultural industries. According to the field survey, Nuodeng Village has core cultural resources such as Bai settlements and Ming and Qing dynasty architecture groups, Bai clothing and other handicrafts, Dongjing ancient music folk activities and Nuodeng ham, and the related cultural industries have been initially developed. On this basis, the SWOT analysis model is used to analyze the development of cultural industries in Nuodeng Village and come up with development strategies such as parallel protection and development, developing new businesses, attracting high-quality talents to design cultural and creative products, broadening communication channels, introducing digital economy, establishing feedback mechanism and realizing beautiful countryside construction.

In 2020, multiple abnormal tensile faults of normal current transformer expansion were occurred continuously, which brought serious harm to the safe and stable operation of the power network. Through the comparison and analysis of this type of current transformer, it is found that the chromatographic data are generally abnormal. Hydrogen, methane, ethane, total hydrocarbon exceed the standard, and some transformers have trace acetylene, but carbon monoxide and carbon dioxide are not involved. At the same time, the transformer expander is extraordinarily stretched, part of the expander top cover falls to the ground. In addition, it is generally difficult to find the discharge point through the breakdown of factory, but the accident time is concentrated in the alternate winter and spring season. In this paper, the fault reason of the current transformer of this type is analyzed and summarized by the case of a 220kV current transformer A phase return factory, and the corresponding suggestions are put forward for the operation and maintenance of the later-stage current transformer.