The maintenance base, as the “backstage” of highway maintenance projects, lacks unified green environmental construction standards and scientific management methods in the process of transformation and upgrading towards greening and intelligence. Therefore, it is unable to qualitatively evaluate the technical level of intelligence and greening of maintenance bases. combining the situation of green maintenance bases in Jiangsu Province and suggestions from relevant experts on the green evaluation system of maintenance bases, based on meeting the pollutant emission standards, the Analytic Hierarchy Process(AHP) and fuzzy comprehensive evaluation method were used to conduct star rating evaluations of green environmental maintenance bases from four aspects, such as green production, energy conservation and emission reduction technology, intelligent management and control, and operational management. A good green demonstration is served for the construction of new types of maintenance bases in the future.

Since its inception, new quality productive forces have garnered extensive attention from both theoretical and practical circles. To objectively grasp and deeply understand the research progress and evolution trends of new quality productive forces, the China National Knowledge Infrastructure(CNKI) database and the CiteSpace software were used to analyze 950 articles published in CSSCI, CSCD, and Peking University Core Chinese Journals. By sorting out the research progress and hotspots, and mapping a knowledge graph, the results reveal that since September 2023, the number of publications in the field of new quality productive forces has grown rapidly, and several influential scholars and research institutions have emerged. However, most scholars lack stable cooperation relationships, showing an overall pattern of “local agglomeration and overall dispersion”. The cooperation among research institutions is not tight, with noticeable regional cooperation but limited cross-disciplinary cooperation. In terms of research hotspots, technological innovation and digital economy have become the focus of scholars’ attention. The integration of new quality productive forces with technological innovation, new quality productive forces and emerging industries, as well as the empowerment of new quality productive forces, have emerged as new research trends. In the future, it needs to build upon current research achievements and continue to deepen the study of new quality productive forces from three aspects, such as strengthening the theoretical and rational explanation of new quality productive forces, expanding the research dimensions of new quality productive forces, and extending the research methods of new quality productive forces.

In the construction of the Northeast Land Sea Corridor, it is an urgent need to enhance the driving force of Liaoning Province’s radiation belt towards the sea and land by leveraging the synergistic effect of the Liaoning Port Group. Taking six ports within the province as the research object, panel data from 2019 to 2022 were selected to evaluate the contribution of each port to the coordinated development of the port cluster using entropy weight method. The dynamic qualitive comparative analysis (QCA) method was used to find a feasible driving path to effectively promote the high level of coordinated development of the Liaoning port cluster. The results indicate that the level of coordinated development of ports is influenced by multiple conditional variables. There are three configuration paths that affect the level of coordinated development of ports, with potential substitution relationships between configurations and no significant time or individual effects found.

In order to sort out the research and development of carbon information disclosure in China, based on CNKI database and using bibliometric method and CiteSpace software, 321 core journal literatures collected by CNKI from 2010 to 2024 were visually analyzed from the aspects of annual publication volume, journal distribution, publishing institutions, research hotspots and research trends. The results show that the literature research on carbon information disclosure in China shows an increasing trend, but the degree of cooperation among high-yield authors in this field is not close, and the stable cooperative relationship between research institutions has not been formed. The research in this field mainly focuses on three aspects, such as carbon information disclosure system, influencing factors and economic consequences of carbon information disclosure, and quality evaluation of carbon information disclosure. Under the background of “dual carbon” goal, the construction of carbon information disclosure system combined with specific industries will be the future research direction.

Airport economic demonstration zones are becoming the growth poles that drive regional high-quality development. Airport economic zones at different stages of development have heterogeneous needs for industrial structure adjustment. Exploring differentiated and coordinated adjustment strategies is of great significance for promoting airport economic development. Based on the life cycle theory, the development stages of national airport economic zones were divided, and the PVAR model and the coupling coordination degree model were constructed to explore the interaction and coordination degree between industrial structure adjustment and airport economic development. The results show that 8 of the national airport economic zones are in the initial stage, 9 are in the development stage, and 1 is in the mature stage. In the initial stage and mature stage, the upgrading and rationalization of industrial structure promote and hinder the high-quality development of airport economy respectively, but such promoting and hindering effects will gradually weaken in the long run, and the hindering effect may turn to promoting effect in the long run. For the mature airport economic zone, the upgrading of industrial structure will slowly promote the development in the long run. The rationalization of industrial structure will play a great role in promoting. The coupling coordination degree between industrial structure and airport economic development is generally increasing with the development of airport economy, and Nanning, Guiyang and Qingdao airport economic zones are on the verge of imbalance. In view of this, the airport economic zone should pay attention to the rationalization of industrial structure and selectively upgrade the industrial structure in the initial period and the development period, and can focus on the upgrading of industrial structure in the mature period.

With the issuance of a series of supportive policies and the rapid development of emerging technologies, the digital public service system is continuously being improved and optimized. Focusing on the actual development of Shandong Province's digital public service system, an evaluation index system for digital public service quality satisfaction that includes 4 criterion layers and 15 target layers was established. Through questionnaire surveys, a fuzzy comprehensive evaluation model was employed to quantitatively assess the quality of digital public services in Shandong Province, and a thorough analysis of the existing issues, particularly the deficiencies in service quality and service innovation was conducted. Based on this, targeted improvement strategies are proposed such as enhancing the timeliness of problem resolution, improving information transparency, strengthening multi-department service integration, providing personalized services, promoting intelligentization levels, and optimizing service processes, in order to effectively enhance the quality of digital public services in Shandong Province and meet the growing service demands of the public.

With the development of technology, the digital economy era has arrived. The 20th CPC National Congress report pointed out that “efforts should be made to enhance the resilience and security level of industrial chains and supply chains” and “promote the deep integration of innovation chains, industrial chains, capital chains and talent chains”, further clarifying the key tasks for modernizing industrial chains.The dairy industry is a long chain industry that involves agriculture, livestock, industry and services. Yili Group is the leading enterprise in China’s dairy products industry and is located at the core position of the entire industrial chain. Meanwhile, the supply chain is an important force that promotes the healthy and stable development of the entire industrial chain. Therefore, achieving digital supply chain management is a trend for future enterprises. The impact of digital transformation on supply chain operations at Yili from 2016 to 2023 was analyzed, identifed the current challenges faced by Yili Group’s supply chain management, and reasonable solutions are proposed.

The social network analysis(SNA) method was used to study the stakeholder relationship network in infrastructure investment projects, revealing the key roles and functions of project companies, construction units, supervision units, and survey and design units in the network. Research has found that project companies play a central role in the flow of information and resources, while construction and supervision units play important roles in connecting parties and bridging information. Although the current network density is low, strengthening stakeholder cooperation, optimizing network structure, and enhancing resource sharing can significantly improve project management efficiency and collaboration effectiveness. Specific measures and suggestions are proposed to enhance the overall management level of infrastructure investment projects and the synergistic effects among stakeholders. Future research can expand the scope of stakeholders, conduct dynamic network analysis, and explore the network characteristics of different types of infrastructure projects, provide more refined management strategies.

Promoting the sustainable development of resource-based cities is an important task for deepening regional coordinated development and building an ecological civilization society. The SBM model was used to calculate the energy utilization efficiency of 282 prefecture level cities in China from 2006 to 2021 from three aspects, such as input, expected output and unexpected output. The National Resource based City Sustainable Development Plan(2013—2020) is regarded as a quasi natural experiment, and the impact of sustainable development policies on energy utilization efficiency is examined using the difference in differences method. It is found that the implementation of sustainable development policies has a significant positive impact on the energy efficiency of resource-based cities, and this conclusion still holds true after a series of robustness tests.

A new type of five degree of freedom hybrid robot(5-DOF) was designed to address the stability issue of aerospace drilling that could not be met by existing parallel robots. The robot integrates the advantages of parallel mechanisms and existing rotary heads, consisting of three Special PurposeUnit(SPU) branches and one Passive Unit(PU) branch, with a unique mechanism layout and stable structural support. Through kinematic analysis of the parallel mechanism and 5-DOF(5-Degrees of Freedom) rotor, as well as position inverse analysis of the hybrid robot, the superiority of the robot in terms of motion performance is verified, providing useful reference for improving robot performance.