Selecting Yangquan City in Shanxi Province as the research region, three evaluation indexes were set, including road network density, road service index and traffic accessibility, which are statistically, analytically and computationally calculated by ArcGIS 10.8.Road Buffer Analysis and Tourism Resource Richness Index were used to evaluate the factors influencing the development of tourism in Yangquan City with the possibility of its realization in the future. The path of realizing the new development pattern in Yangquan City was analyzed. Finally, it is concluded that the transportation accessibility of Yangquan City varies greatly from county to county. Urban areas and mining areas have high transportation accessibility, suburban areas and Pingding County are average, and Yuxian County has poor transportation accessibility.The distribution of tourist attractions of Grade A and above in Yangquan City is characterized by distribution with the topography, and the distribution of tourist attractions in the suburban areas, Yuxian County and Pingding County is more balanced, with stronger transportation accessibility. Targeted recommendations is upgrade the great pressure low-grade roads to national or provincial highways, strengthen the road transportation capacity, expand the scope of road services.According to the characteristics of different districts and counties for targeted construction, the landscape protection and development of tourism-friendly Pingding County area, the traffic gateway to Yu County for the expansion of the road and the construction of the accelerated connection with Beijing-Tianjin-Hebei and the Xiong’an New Area.Multifaceted stimulation of domestic demand, the improvement of the economic structure, and then the good accessibility of transportation. improve the economic structure, and then feedback the good economic growth to the environment, forming a good cycle; seize the opportunity of the times, give full play to the great potential of Yangquan City, and build a new pattern of rural revitalization and development.

Based on the extended gravity model, the impact of business facilitation in RCEP(Regional Comprehensive Economic Partnership) countries on China’s OFDI(outward foreign direct investment) was empirically examined, using China’s panel data on OFDI from 2005 to 2020.The results show that the facilitation of business environment in RCEP countries is conducive to promoting the growth of OFDI in China, but the results are different in each sub-indicator of business environment. The facilitation of the business environment in RCEP ASEAN countries has a promoting effect on China’s OFDI, while the promotion effect of RCEP non-ASEAN countries is not obvious. Based on different investment motives, the impact of business facilitation in RCEP countries on China’s OFDI is also different. With the in-depth implementation of RCEP, the business environment of various countries will continue to be optimized, and the level of China’s direct investment in RCEP partner countries will continue to rise.

Taking the green supply chain consisting of one manufacturer and one retailer as the research object, the effects of channel demand discount and the manufacturer’s social responsibility on the manufacturer’s channel choices under the equal retail pricing strategy and the three channel strategies were studied. The findings show that when the level of social responsibility and the discount coefficient of demand shifting are low, it is optimal for the manufacturer to open both retail and direct sales channels, and when the level of social responsibility and the discount coefficient of demand shifting are high, the manufacturer achieves the best total profit by retaining only the direct sales channel.

As China’s emission reduction efforts continue to advance, the carbon emissions of the chemical industry have shown a gradual downward trend. However, the industry still faces challenges of high energy consumption and high carbon emissions in achieving the carbon neutrality goal. A system dynamics-based carbon emission model was constructed to simulate the carbon emissions of chemical sub-industries from 2010 to 2021.Dynamic effects of factors such as per capita consumption, fixed asset investment, and education level on carbon emissions were analyzed. The simulation results indicate that an increase in consumption levels may put pressure on carbon emissions, but significant reductions can be achieved through increased investment in fixed assets and promotion of green consumption behavior.

The study of investment networks is crucial to the promotion of regional integration. Based on the data of enterprises’ outward investment from 2005 to 2022, the nodes, patterns and structural evolution characteristics of the investment network as a whole and in different industries were analyzed using social network analysis. The investment linkage matrix was also constructed and the SLM(spatial lag model) was used to explore the externalities of the investment network. The results show that the power polarization of investment network nodes is obvious, with Chengdu and Chongqing occupying an absolutely dominant position. The investment network power of manufacturing and financial industries shows ring and fragmented distribution, respectively. The investment network pattern evolves towards multi-core equilibrium, and the manufacturing network pattern is more mature. The investment network has an obvious core-edge structure, but the difference in core degree gradually decreases. The investment network has significant positive externalities on economic growth, showing a trend of decreasing and then increasing. The manufacturing investment network has a stronger role in promoting economic growth. Consumer markets and government policies are important factors driving economic growth in local and linked cities.

RCEP (Regional Comprehensive Economic Partnership) provides broad space and opportunities for the optimization and upgrading of industrial structure in Guangxi, and promotes high-quality economic development in Guangxi. By conducting in-depth research on the opportunities and challenges brought by RCEP,reference for Guangxi is proposed to formulate a scientific and reasonable path for optimizing and upgrading its industrial structure. By using comparative analysis, the problems and challenges facing Guangxi’s current industrial structure were analyzed. A path for optimizing and upgrading Guangxi’s industrial structure under RCEP is proposed. Guangxi should fully utilize the policy dividends of RCEP to promote technological innovation, accelerate the development of digital technology, extend the industrial chain, highlight green development, transform traditional industries, optimize industrial structure, and optimize regional layout. raditional industries, optimize industrial structure, and optimize regional layout.

In order to further explore the feasibility of key technologies, related products, markets, and policy measures in the hydrogen energy industry at different time nodes, an analysis framework for the development of the hydrogen energy industry was constructed based on industrial technology road-map. The incoPat patent database was used to clarify the current development status of the hydrogen energy industry through technology patent retrieval and analysis. Adopting questionnaire survey and expert interview afterwards,the development trend of China’s hydrogen energy industry is predicted and depicted from aspects of industrial environment, main products, key technologies, etc. Based on above predictions and depictions,a roadmap for the development of China’s hydrogen energy industry is drawn. In combination with the construction practice of Changping “Energy Valley”, suggestions for industrial development are systematically put forward, such as increasing technological research and development in the field of hydrogen production using renewable energy, actively promoting pilot demonstrations, accelerating the construction of a national hydrogen energy supply system and a whole industry chain system of hydrogen industry with green hydrogen as the core, improving the standard system, and strengthening international cooperation.

Promoting industrial ecologicalization is an inevitable choice for achieving sustainable development. Grounded theory was applied to analyze the ecological structure of the prefabricated construction industry, the mature ecological structure system of the industry was delved into. A four-dimensional industrial ecological structure framework of “resource environment ecological culture application execution management control” was constructed. The connotation of mature ecology in the prefabricated construction industry was defined. Comprehensive characterization of the mature ecological structure system of the prefabricated construction industry. By analyzing the case, an industrial ecological model was established and optimization strategies were provided to verify the accuracy of the system. Reference on how to achieve greater benefits in various aspects through ecological transformation in the prefabricated construction industry is proposed.

Considering the effect of the separation between the supporting layer and the base layer of the ballastless railway caused by foundation settlement, a simplified method was proposed for calculating the rail deformation of the ballastless railway to tunnelling underneath. Firstly, the track slab and the supporting layer were supposed as a composite elastic beam, and a simplified equation for the deformation of ballastless railway composite beams induced by shield tunneling was proposed by ignoring the influence of fasteners on the composite beam deformation. Afterwards, the composite beam was divided into a void zone and a joint zone, and the analytical solutions for the deformations of the composite beams caused by tunnlling underneath were proposed based on the elastic foundation beam theory. Furthmore, the rail was regarded as an Euler beam connecting with the composite beam by the dispersed spring, and the equations for the rail deformation caused by the composite beam deformation were derived. Based on the above, compared with the numerical simulation and theoretical results in the existing literature, the proposed simplified method of the ballastless railway caused by tunneling underneath was validated. Finally, the influences of model parameters on the rail deformation to tunnelling underneath were discussed, including the tunnelling induced ground loss rate, the composite beam bending stiffness, the fastener stiffness, and the rail bending stiffness. The results indicate that the theoretical calculation results were overestimated by neglecting the local suspension effect of the supporting layer. Reducing the tunnelling induced ground loss rate, strengthening the composite beams and rails can control the rail deformation of the ballastless railway caused by tunnlling undercrossing, but strengthening the fasteners stiffness may increase the unevenness of rail deformation.

Pre-application evaluation of patents is important to improve patent quality, form high-value patent, and promote the transformation of achievements. By investigating the current situation of pre-application evaluation of patent in domestic universities, the problems existing in the pre-application evaluation of patents in universities was analyze. A classification and grading pre-application evaluation model for patent is proposed, which is guided by improving the quality of patent applications and creating high-value patent, taking objective elements as evaluation indicators, and taking into account the classification and grading of different application purposes of the invention body in terms of school organization and personnel allocation, fund investment, and the differences in the application purposes of the invention body. Since different evaluation levels are adopted for different invention bodies, compared with traditional evaluation, it can effectively reduce personnel and capital investment.