Latest ArticlesAccording to the challenge of monitoring the structural integrity of LNG storage tanks, persistent scatterer interferometric synthetic aperture radar (PS-InSAR) and small baseline subset InSAR (SBAS-InSAR) technologies were employed, sentinel-1A satellite imagery and digital elevation model (DEM) data were utilized to conduct deformation monitoring and stability assessment for an LNG terminal on an island in Guangxi, China. The results reveal three key findings. The maximum settlement occurrs in the LNG platform area in August, 2022, accompanied by slight uplift around the tanks. PS-InSAR detects annual deformation rates of -2.5 to 2 mm/year across 73% of the monitored area, while SBAS-InSAR indicats rates of -3.5 to 3 mm/year in 45% of the region, demonstrating overall deformation stability. Rainfall during the wet season shows a significant positive correlation with deformation magnitudes, where water infiltration increases soil pore pressure (reduced effective stress) and alters foundation bearing capacity, though no hazardous differential settlement is observed. The study demonstrates that radar interferometry enables millimeter-scale deformation monitoring across LNG storage facilities, providing critical technical support for operational safety in coastal areas with complex geological conditions.
Intellectual property protection and scientific research investment are important policy tools to promote scientific research in colleges and universities. Based on the perspective of policy mix, the relevant provincial data from 2008 to 2022 was used, and the propensity score matching method was applied to study the absolute effect and incentive effect of different policy mix on the scientific research output of universities, and heterogeneity test by region was conducted. The results show that the policy combination of high intellectual property protection and high scientific research investment has a significant role in promoting the scientific research output of universities. Compared with high IPR protection and low IPR protection and high IPR protection, high IPR protection and high IPR protection have a greater role in promoting the scientific research output of universities.
Coordinated development is the inevitable requirement and driving path for the three major industrial clusters of electronic information, automobiles, and equipment manufacturing to achieve high-quality development and cultivate world-class industrial clusters. An in-depth analysis of the current status of the coordinated development of electronic information, automobile and equipment manufacturing industrial clusters in the Chengdu-Chongqing region was conducted. The research finds that Chengdu-Chongqing region has achieved good results in regional linkage, industrial chain cooperation, collaborative innovation, talent training and shared cooperation. However, it still faces problems and challenges, such as homogeneous industrial structure, weak industrial chain, insufficient innovation resources, unbalanced talent finance and low digital collaboration. Therefore, corresponding countermeasures and suggestions are put forward from six aspects, such as industrial planning coordination, industrial chain cooperation, innovation resource aggregation, talent policy collaboration, financial integration and industrial digitalization.
With the rapid development of mountain highway construction, frequent high-positioned collapse disasters have posed serious threats to road traffic safety. Based on a typical high-positioned collapse case along a highway in the western Sichuan Plateau, geological surveys and numerical simulation analysis were employed to reveal the formation mechanisms of high-positioned collapses, analyze collapse energy, and propose a hierarchical passive protection combined with monitoring prevention method. The results indicate that unfavorable topographic and geological conditions serve as fundamental factors, with long-term weathering exacerbating structural plane deterioration. Rainfall acts as a triggering factor, where rainwater infiltration induces creep deformation of unstable rock masses leading to collapse development. The prevention method utilizing passive nets, open-cut tunnels, and intelligent monitoring systems proves effective for collapse control. This protection scheme can be promoted for application in canyon geomorphological regions.
Safety evaluation is an important prerequisite and guarantee for the development of railway dangerous goods transportation. Taking a special railway lithium battery transportation project in Yibinm Sichuan as an example, the project area was divided into 8 evaluation units, and the safety check list method and fault tree method were used to evaluate the safety, and the main disaster control factors and safety work points were discussed. The results show that the safety checklist method is suitable for the inspection events specified in the specification provisions, and the fault tree method can effectively analyze the cause of the event and the weight of the elements through the minimum cut set and the importance calculation. The safety guarantee of transportation and loading and unloading operation should pay attention to personnel standard operation, labor protection and safe location of operation area.
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.
Glaciers serve as indicators of climate change, and their changes in reserves and distribution have significant impacts on downstream ecology and human security. Taking A’nyemaqen mountain as the research area to study its changing characteristics, reference was provided for regional ecological environment protection and economic and social development. Using Landsat data and Sentinel-1A data to extract the area and surface velocity of the A’nyemaqen glacier, combined with temperature and precipitation data from two nearby meteorological stations in the study area, the relationship between glacier changes and climate in the region from 2014 to 2020 was analyzed. From 2014 to 2020, the number of glaciers increased from 80 to 85, an increase of 5 glaciers. The glacier area has retreated from 98.46 km2 to 86.58 km2, a retreat of 11.88 km2. The A’nyemaqen Glacier shows an overall trend of retreat, with glacier flow velocity greater at the central axis than at the two wings and gradually decreasing from high to low altitude to the end of the ice tongue. The temperature and precipitation in the research area have shown an increasing trend, with a more significant increase in precipitation. However, the glacier area still shows a shrinking trend, indicating that the amount of glacier melting is greater than the cumulative amount.
Technology-based talents are an important support for the development of new quality productivity. Local technology legislation should create a favorable legal environment for the development of technology-based talents. Based on legislative texts, a comparative analysis was conducted on the chapter design, standardized objects and regulatory content related to technology-based talents in the comprehensive science and technology regulations of eleven provinces and cities. On this basis, it is proposed that local efforts to strengthen legislation on technology-based talents should be regulated in the form of a whole chapter, clarify the legislative norms and form a complete legislative system with talent work as the main content, in order to provide useful inspiration for local construction of a technology-based talent legislative system that adapts to new quality productivity.
As a new productivity tool, construction robots will help promote the development of new business forms and industrial upgrading in the construction industry. Aiming at the problems that the traditional building floor grinding equipment must be manually followed and controlled with low construction efficiency, an intelligent and automatic floor grinding construction robot was designed. The overall technical scheme framework and key technical principles of the robot was analyzed and explained. Then, through engineering application cases, the construction process of the floor grinding robot was described, and the comprehensive construction benefits of the robot and traditional equipment were compared and analyzed. The result shows that the comprehensive construction cost reduction rate of the robot is about 19.4%, which has a higher construction cost advantage. Finally, the social benefits of popularizing and applying the robot was elaborated as well.
In order to study the deformation and failure mechanism of a high steep slope under underground excavation, the influence of different locations of tunnel excavation on slope stability was analyzed by using the finite element sliding surface stress method, and the failure mechanism and deformation characteristics of slope instability induced by underground excavation were systematically studied. The results show that the underground excavation destroys the original equilibrium system of the slope, redistributes the stress of the slope in the influence range of the excavation, and creates new tensile stress regions, compressive stress regions and shear stress regions in different areas of the slope, which causes adverse additional displacement on the surface and internal points of the slope, and thus has a significant impact on the stability of the slope. According to the position relationship between underground excavation holes and sliding surface, slope instability induced by underground excavation can be divided into four types, which are local slope collapse, slope A-type slip, slope B-type slip and slope C-type slip, and the failure process and mechanical mechanism of each type of instability are revealed.