Aiming at challenge about the limited reforestation effect of conventional fracturing operating type on tight sandstone reservoir in Linxing block of Ordos Basin, using core data, experimental analysis data, well logging data and production dynamic data, parameter normalization and weight analysis methods were used to conduct a friability evaluation for volume fracturing in tight sandstone reservoirs. For the first time in this region, a multi-parameter comprehensive evaluation formula and parameter criteria were established and a set of volumetric fracturing design scheme and supporting process method suitable for this area were formed. After field application in Linxing Area, the productivity of volumetric fracturing is increased by 1.3 times compared with that of conventional fracturing. With exceptionally abundant tight sandstone gas reserves in Linxing, the friability evaluation-guided volume fracturing technology represents a significant innovation in hydrocarbon development. This approach has shown growing advantages in unconventional resource exploitation and holds broad prospects for industrial applications.

Under the background of rapid urbanization and industrialization, the risk of environmental damage to architectural heritage was increasingly exposed. Taking Tianjin as the research area, the advantages of macro and micro scale architectural heritage risk were comprehensively evaluated based on the environmental perspective of urban resilience. The construction heritage vulnerability environmental risk assessment system should be established with flood risk, comprehensive terrain and geological risk, atmospheric environment risk, fire risk, traffic facility risk and architectural heritage value risk as evaluation factors. Based on the past research, the quantitative factors were selected, and the spatial quantitative evaluation of geographic information system was used to screen 18 indicators and carry out correlation analysis. The research results show that the vulnerability areas of architectural heritage are highly concentrated in urban areas, and the influence of human factors is higher than that of natural factors. Generally speaking, the high vulnerability area is mainly concentrated in the peace area, which is distributed nuclear to the six districts in the city. Most of the architectural heritage is located in the six districts of the city, which has a high risk from the perspective of urban resilient environment.

General purpose technologies (GPTs) exhibit strong externalities and innovational complementarities. Their diffusion within supply chains and impact on the technology ecosystem are of significant interest to both industry and academia. Based on the resource dependence theory and absorptive capacity theory, the nonlinear effects of leader firms' GPT innovation on the technological complementarity between leader firm and its supply chain partners was examined. It also explores the boundary conditions of these effects. Analyzing panel data from 1,405 firm-year observations of 145 biopharmaceutical firms from 2010 to 2019, the findings reveal that an inverted U-shaped effect of GPT innovation performance on the technological complementarity between leader firm and its supply chain partners.Within the supply chain, partners' capability in GPT innovation positively moderates this inverted U-shaped relationship.

Static pressure densification piles exhibit significant technical and economic advantages in addressing the collapsibility of loess. However, during construction, there is a widespread issue of severe shrinkage after static pressure hole formation. To address this, specialized field tests were conducted using the volume conversion method to compare and analyze the shrinkage conditions of static pressure densification piles after the first and fourth hole formations. It is found that shrinkage occurred to varying degrees after both hole formations, with the overall shrinkage rate after the fourth hole formation reaching as high as 26.54%, an increase of 101.40% compared to the first hole formation. To effectively tackle this challenge and ensure the quality of pile construction, the importance of the tamping and filling process stands out. Given the limitations of traditional heavy hammer tamping methods in terms of construction efficiency, quality control, and environmental protection, an innovative fill-tamp integrated device has been developed. This device not only improves the quality and efficiency of densification pile construction but also advances tamping and filling technology, achieving dual improvements in economic and social benefits, and it has value for promotion and application.

With the development of engineering in cold regions, it is important to accurately derive the thermoplastic parameters of soils under freeze-thaw conditions. In view of the large error of the commonly used BP neural network to predict the thermal property parameters, 120 sets of thermal property parameters of frozen and thawed soil were used as samples, and the prediction model was improved by Bayesian regularization method to establish a multi-input and multi-output BP neural network, and the prediction accuracy of the model was significantly improved. Sensitivity analyses of the Bayesian neural network and random forest model were carried out with the improved Monte Carlo method and SHAP interpretation, respectively. The results show that the freeze-thaw condition does not change the sensitivity ranking of the influencing factors. The sensitivity of volumetric heat capacity and thermal conductivity to water content, dry density, and soil quality decreases in the order of freezing and thawing state, and the sensitivity of thermal conductivity to soil quality, water content and dry density decreases in the order of soil quality, water content and dry density.

Based on data from 50 manufacturing listed companies in Henan Province from 2019 to 2023, the DEA-BCC model and Malmquist index were employed to evaluate corporate operational performance from both static and dynamic perspectives. The findings reveal that the average comprehensive efficiency of the 50 manufacturing listed companies in Henan Province during from 2019 to 2023 is 0.834, primarily constrained by pure technical efficiency and scale efficiency. The total factor productivity of the sample companies is less than 1 and showes an overall declining trend, mainly due to a decrease in the technological change index. Based on these results, several recommendations are proposed for the future development of Henan's manufacturing sector, aiming to address regional development imbalances and enhance corporate operational performance.

Public data ownership confirmation policies, as an administrative regulatory tool, play a significant role in promoting the further openness and utilization of public data. 11 policy texts related to public data ownership confirmation issued by the three northeastern provinces of China was evaluated. A policy evaluation index system was constructed, and the PMC index model was applied for quantitative assessment. The results indicate that the overall policy level is close to satisfactory. However, issues such as low attention to policy content and feedback mechanisms, insufficient flexibility in policy design, and a relatively narrow policy perspective persist. Based on these findings, optimization pathways are proposed, including benchmarking to address internal shortcomings, enhancing short-term policy adjustments, broadening stakeholder participation, and expanding the horizons of policy formulation.

Taking the backfilling station for the Chifeng NFC Baiyinnuoer Mining Co. Ltd. as an example to resolve the problems of uneven bottom flow concentration and slow settling speed of tailings particles during the coagulation and settling process of total tailings, various candidate anionic polyacrylamide flocculants were subjected to tailings static coagulation and settling tests to select the most suitable flocculant type. Finally, the coagulation effect was verified through industrial experiments, and the addition parameters were optimized. The results show that the optimal flocculant type for settling the total tailings of the mine is SNF1055SH. When the concentration of the total tailings slurry is 14%, the flocculant solution concentration is 2.5‰, and the flocculant dosage is 30 g/t, it can ensure that the bottom flow mud layer of the deep cone thickener is uniform and the top overflow water is clear.

The overall victory in the battle against poverty indicates that China has comprehensively solved the problem of poverty, but some residents still have the risk of returning to poverty. In order to avoid this phenomenon as much as possible, the Party Central Committee clearly proposed to actively establish a monitoring mechanism to prevent returning to poverty. It constructs the rural poverty return monitoring index system and EGM-Markov poverty return risk early warning model, forecasts the development trend and divides the early warning level, and takes YS County of Heilongjiang Province as a case to verify the feasibility of the model. In addition to establishing a long-term assistance mechanism, stimulating the endogenous motivation of the poor is very important to avoid returning to poverty.

In construction projects, procurement suppliers not only affect the quality and progress of the project, but also directly affect the cost of the project. How to select high-quality suppliers that meet project requirements from numerous suppliers has become an urgent problem to be solved. Based on this, a research on the selection of construction project procurement suppliers based on ANP+VIKOR algorithm was proposed. Taking into account multiple factors, a multi-dimensional supplier selection indicator system was constructed, and the indicator data was standardized. The ANP algorithm was used to clarify the relationship between each indicator and the weights of the indicators were calculated. The VIKOR algorithm was used to calculate the group utility value and individual regret value of each supplier, and the compromise value of each supplier was obtained, and the suppliers were ranked. Case analysis shows that the studied method can stably select the optimal supplier and exhibits relative insensitivity to changes in decision mechanism coefficients, demonstrating its reliability and practicality in practical applications.