In the context of “rural revitalization” and the “dual carbon” goals, sustainable agricultural development has become an important issue and a necessary path for the development of “agriculture, rural areas, and farmers”. Based on agricultural insurance data from 11 provinces and cities along the Yangtze River Economic Belt from 2010 to 2020, the entropy method was used to measure the level of sustainable agricultural development and the impact of agricultural insurance on sustainable agricultural development and its mechanism were estimated through a fixed effects model. The results show that the level of sustainable agricultural development in various provinces and cities along the Yangtze River Economic Belt has increased significantly, with the upper reaches of the Yangtze River showing a higher increase in recent years than other provinces, indicating significant achievements in “source governance”. Benefiting from agricultural technological innovation, Shanghai has a much higher level of sustainable development than other areas downstream of the Yangtze River. Agricultural insurance can positively regulate the level of sustainable agricultural development through adjustments in production structure and factor input.

The premise of realizing the ownership rights and interests of national natural resource assets lies in the accurate evaluation of asset value. With the deepening of research, the scope of natural resource asset evaluation has gradually expanded from the initial simple econometric quantity value to the more complex economic-ecological comprehensive value. Therefore, a comprehensive and systematic requirement is put forward for the evaluation of natural resources assets. Based on the requirements and practical exploration of the natural resource principal-agent mechanism, the construction of the natural resource asset value evaluation framework was studied, and the construction of the natural resource asset evaluation framework under the principal-agent purpose of national ownership of all natural resource assets on the basis of clarifying the logical relationship between various evaluation items was exploresd. It is expected to be beneficial to the value accounting and the implementation of the owner’s equity in the later stage of the entrustment of the ownership of natural resources assets.

Taking a closed-loop supply chain composed of manufacturers and retailers as the research object, the impact of different environmental and social responsibility modes on system decision-making was explored. The results show that supply chain members who do not bear environmental and social responsibility can benefit from the environmental and social responsibility behaviors of other members of the supply chain. The environmental and social responsibility behaviors of any supply chain member can effectively improve the environmental and social governance performance of the system and improve the reliability of products. The environmental and social responsibility behaviors of supply chain members will have a profit effect, which can effectively adjust the profit distribution of the system.

With the increasing application of high voltage direct current transmission(HVDC) in cross regional transmission of new energy, new energy units at the transmission end may not only suffer from voltage dips and high voltage faults, but also face challenges of low and high voltage disturbances caused by DC commutation failures. In order to accurately analyze the impact of wind farm integration on the power system, a four-machine equivalent method was proposed based on doubly fed induction generator (DFIG) to adapt to multiple types of faults at the DC transmission end. Firstly, the general power curve of wind turbines was modeled for low voltage ride through, high voltage ride through, and continuous low and high voltage ride through in accordance with national standards. Next, the single machines that suffer from multiple types of faults from the cut in wind speed to the cut out wind speed was traversed, and the wind turbines in the wind farm was clustered. Finally, a four-machine equivalence method is proposed based on simulation results.

Taking Evergrande Group as a case study, based on the research of its financial statements and operational data, the problems in fund management, debt management and risk control were identified, and the root causes of these problems and their impact on corporate financial management were deeply explored. Based on this, it is concluded that enterprises need to fully consider the characteristics of the real estate industry when conducting financial management, and develop scientific financial strategies to cope with the challenges and uncertainties brought by the characteristics of the real estate industry. In addition, a series of response strategies targeting the characteristics of the real estate industry are proposed, including reducing debt ratios, strengthening cash flow management, optimizing financing structure, improving financial transparency, and enhancing profitability.

607 papers published in CNKI database and 308 documents published in WOS database from 2014 to 2024 were selected to conduct in-depth analysis and research from the perspectives of the number of publications, high-frequency authors and keywords by adopting CiteSpace visualization research method. The result shows that the number of publications in the field of carbon performance research is on the rise, but a closely cooperating author network has not yet been formed. The hot spots of carbon performance research are mainly focused on low carbon economy and carbon performance, carbon performance evaluation, and the influencing factors and economic effects of carbon performance, and so on. In the future, it is necessary to continue to expand the research perspectives of carbon performance, focus on the research of digital transformation, technological innovation and carbon performance, and strengthen the interdisciplinary cooperation mechanism.

Uusing data from the China Household Tracking Survey to match data with the County Digital Countryside Index (2018), the impact effect of digital countryside and its four sub-dimensions on the upgrading of rural households’ consumption structure was studied. Benchmark regression shows that the digital countryside facilitates the upgrading of rural households’ consumption structure, and mechanism research indicates that rural households’ non-farm income and residents’ digital skill level are important factors that promote the digital countryside to enhance the upgrading of consumption structure. Heterogeneity analysis shows that the impact of digital countryside on the upgrading of the consumption structure of different rural areas, different characteristics of households and different heads of households is different.

Under the double constraints of resources and environment, improving green total factor productivity is crucial to realizing high-quality development. The Emissions Trading System has entered a deepening stage of development after decades of piloting in China, and it is of great significance to research the impact of the implementation of the Emissions Trading System on green total factor productivity. Taking the Emissions Trading System implemented in 2007 as a natural experiment, based on the panel data of 30 provinces(due to the lack of data, the statistical data mentioned here do not include the Tibet Autonomous Region, the Hong Kong Special Administrative Region, the Macao Special Administrative Region and Taiwan Province) in China from 2004 to 2020, difference-in-difference method (DID) was employed to explore the impact and mechanism of the Emissions Trading System on GTFP. The results highlight that the Emissions Trading System significantly enhances regional GTFP. The impact mechanism test shows that the Emissions Trading System further enhances GTFP by promoting green innovation and industrial structure upgrading. Relevant government departments can use the research findings as policy insights to further maximize the role of the Emissions Trading System in promoting economy and green development.

Because of the separation of enterprise ownership and management rights, the contradiction between managers and shareholders is always the root cause of intensifying the conflict of interest between them. Equity incentive, as an effective medium and long term incentive mechanism for management, can alleviate agency problems and reduce agency costs, and is an important means to solve conflicts of interest. In order to improve the loyalty of the management to the company, prevent the short-sighted behavior of the management, and guide the management to maximize their personal talents, based on the data of Shanghai and Shenzhen A-share listed companies from 2014 to 2022, descriptive statistics, correlation analysis, regression analysis and other analytical methods were used to study the relationship between executive equity incentives and corporate performance. It is found that the implementation of equity incentive has dual significance. It can not only effectively improve enterprise performance, but also reduce agency costs.

In order to further explore the simulation of nanofluid heat pipe, the VOF(volume of fluid) model in Fluent software was used to take single nanofluid (TiO₂-H₂O) and mixed nanofluid (Al₂O₃+TiO₂-H₂O) as working medium. The feasibility of using Fluent to simulate nanofluid heat pipes was comprehensively analyzed from the visualization analysis of evaporation and condensation process inside heat pipes and the results of the overall thermal parameters. The results show that, from the visualization point of view, the simulated nephogram can reflect the phase transition process in the heat pipe with time. However, there is still a 3% error between the specific simulation value and the corrected experimental value, indicating that there are unconventional factors affecting the simulation results. It is feasible to use the VOF model to simulate the nanofluid heat pipe in numerical law and visualization analysis, but it is still necessary to combine other simulation methods to study the detailed principle.