Tunnel construction ventilation can effectively eliminate harmful gases and dust, and ensure the safety of construction environment. Taking an extra-long road tunnel as an example, the air demand for the construction of inclined shafts and tunnels was calculated with multiple working faces, choose the appropriate fan models, and the tunnel construction ventilation in stages was designed according to the construction progress of inclined shafts and main caves. A section of the split tunnel was used as a ventilation tunnel, and the roadway + pressurized ventilation method is adopted to shorten the length of the air supply ducts. FLUENT software was used to establish a three-dimensional numerical model of multi-working face construction ventilation, in-depth study of CO(carbon monoxide) diffusion regulations in tunnels. The results of the study show that CO migrates from near the tunnel face to the entrance in the form of “air mass”, and the migration rate is positively correlated with the ventilation wind speed in the tunnel.The location of the high CO concentration zone at the intersection of the inclined shaft gradually shifts to the right (low velocity zone) as the wind velocity ratio gradually becomes larger, and the maximum concentration gradually decreases.The wind speed ratio has no significant effect on the change of CO concentration in the left hole.

Enterprise resilience is one of the important capabilities of enterprises to respond to external crises, and how to improve corporate resilience and promote the steady and healthy development of the economy has become an important issue worthy of attention. Based on this, the A-share listed companies in Shanghai and Shenzhen from 2013 to 2022 was taken as a research sample to empirically test the impact of the asset-light operation model on the resilience of enterprises, and the impact of property rights on the relationship between the two. The empirical results show that the asset-light operation model positively affects the resilience of enterprises, and the property rights will weaken the positive correlation between the two.

The traditional urban lighting inspection method has many shortcomings, and the unmanned aerial vehicle inspection solution has been put into use in the fields of electricity, water conservancy, and urban monitoring and has achieved good results. Research on unmanned aerial vehicle intelligent inspection technology in the field of urban lighting, introducing technologies such as deep learning based urban road surface illumination collection and visual recognition based municipal infrastructure disease monitoring to achieve efficient and accurate inspection of urban road lighting facilities. In the data processing stage, fault detection and recognition are performed using a trained YOLOv5 deep convolutional neural network (CNN) model, combined with techniques such as adaptive anchor box computation and Mosaic data augmentation. The experimental results show that the system can effectively detect various types of defects in urban lighting and complement traditional inspection methods, accurately detecting potential faults in urban lighting facilities and providing data support for subsequent maintenance. This system provides an effective solution for the digital and intelligent management of future urban lighting facilities, and has great application prospects and promotion value.

Based on the super-efficiency NSBM(network slack based modle) model, an industrial green development efficiency index system reflecting the industrial economy, ecological benefits and social welfare was constructed, and the industrial green development status of Qaidam Basin from 2010 to 2021 was calculated. The results show that the overall efficiency of industrial green development is not effective with DEA(data envelopment analysis), and the years with effective DEA are all weak with DEA. In the 13th Five-Year Plan period, the environmental economic efficiency and environmental welfare efficiency were consistent.The industrial green development model was mainly “high-high” and “low-low”, and the development is uneven and unstable.

In order to better grasp the future development direction and innovative development path of transport aircraft and their propulsion systems, the first-principles analysis method was used to analyze the Breguet range equation. The results show that the innovation and development of transport aircraft mainly revolves around three dimensions, including the improvement of aerodynamic performance, the improvement of weight performance and the improvement of propulsion performance. The innovation and development of aircraft technology depends on the progress of aviation science and technology on the one hand, and is affected by the development environment on the other hand. The power is still based on the turbofan engine with large bypass ratio, and the use of new concept engines such as hybrid electric vehicles mainly depends on technological breakthroughs such as batteries.

In order to study the creep effect of concrete-filled steel tube tied arch bridge, taking 1-128 m concrete-filled steel tube arch bridge as an example, a three-dimensional finite element calculation model was established. According to the creep model of concrete-filled steel tube under the action of steel content, core concrete strength and temperature proposed by Jung Ling Chang, the influence of creep on the long-term deformation and internal force of concrete-filled steel tube tied arch bridge was analyzed. The results show that the arch rib creep will cause the arch rib and tie beam of the concrete-filled steel tube tie arch bridge to produce flexural deformation, and the arch rib stress will redistribute, resulting in the arch rib stress increasing and the core concrete stress decreasing. The stress redistribution of arch rib, girder and arch rib caused by the creep of arch rib under the consideration of temperature is greater than that without the consideration of temperature. The influence of temperature on creep should be considered in bridge design, construction monitoring and later use stage, so as to reasonably predict long-term creep deformation and stress redistribution during operation stage.

Based on survey data from 300 migrant workers in Foshan, Guangdong Province, the AF(Alkire-Foster) method was used to examine the multidimensional poverty characteristics of migrant workers. It explains the heterogeneity of multidimensional poverty from both spatial and group perspectives. It is found that migrant workers living in urban villages have lower poverty incidence rates in the dimensions of quality of life and working conditions compared to those in urban-rural junctions and suburban areas in terms of spatial heterogeneity, with multidimensional poverty being most severe in suburban areas. In terms of group heterogeneity, physical laborers and ordinary workers with lower skill levels have significantly higher poverty incidence rates in the dimensions of income and assets, education and skills, quality of life, and working conditions than skilled workers and managers with higher skill levels. The poverty incidence across various dimensions decreases as education levels increase, with migrant workers having primary school education or below experiencing the highest incidence and intensity of multidimensional poverty. Finally, policy recommendations for governance are proposed based on these findings.

By combing the literature on policy pilot since the 18th CPC National Congress, Cite Space software is used to draw it into a knowledge map and analyze it, to discuss the hot spots and development trends of China’s policy pilot research. The results show that the number of papers published in policy pilot studies is on the rise, and the research hotspots mainly focus on the occurrence process of policy pilot, the central-local relationship in policy pilot, the knowledge production in policy pilot, and the innovation diffusion in policy pilot. Based on this, it points out the shortcomings of the existing research, and provides reference for the future research of the policy pilot.

Selecting panel data from 14 cities and prefectures in Hunan Province from 2012 to 2022, an evaluation index system for social security and common prosperity was constructed. A panel regression model was used to analyze the mechanism and effects of social security on common prosperity. Research has found that social security can significantly improve the level of common prosperity in regions. Social security has the greatest promoting effect on the level of wealth, with a 31.2% increase in wealth, a 6.3% increase in commonality, and a 0.4% increase in sustainability for every 1% increase in social security level. The coverage of social security has the most significant impact on common prosperity. Social security indirectly promotes common prosperity through employment effects, with an intermediary role accounting for 6.3%.

With the comprehensive deepening of the “Belt and Road” initiative, the development of international dry ports has ushered in unprecedented opportunities. Combining the current development situation of China’s international dry ports and the development overview of Shijiazhuang international dry port, development countermeasures were put forward, such as optimizing the logistics products of international dry ports and creating industrial clusters based on the characteristics of the location, with a view to promoting the high-quality development of Shijiazhuang international dry port and injecting strong kinetic energy for actively integrating into the “Belt and Road” and promoting the high-quality development of the regional economy.