In order to study the problem that the processing of 7075 aluminum alloy rings was affected by the large value of initial residual stress, the effect of reducing the residual stress was investigated by using the method of compression of 7075 aluminum alloy rings along the ring direction. ABAQUS simulation software was used to simulate the quenching and compression of 7075 aluminum alloy rings to obtain the initial residual stress field and the residual stress field after compression. The results show that the initial residual stresses generated by quenching can be effectively reduced by the method of compression in the ring direction. After the data before and after compression is compared, it is found that when the compression deformation amount is 1.312 5%, the amplitude of quenching residual stress decreases by 57% of the original residual stress value as a whole, and the amplitude of radial residual stress and circumferential residual stress decreases by about 58%. It is concluded that the method of circumferential compression can effectively reduce the residual stresses of aluminum alloy ring parts.

In order to find out the uranium metallogenic potential of the Lower Cretaceous in Kelulun Sag of Hailar Basin, the spatial distribution of sequence stratigraphy, types and distribution characteristics of sedimentary facies and favorable spatial location of uranium enrichment in the area were studied by using sequence stratigraphy and sedimentary facies analysis methods based on core, logging and seismic data. The results show that the third-order and fourth-order sequence stratigraphic division marks of the target strata in the Kelulun Sag are determined. The target strata are divided into one super sequence, two three-order sequences and four fourth-order sequences, and the distribution characteristics of sequence stratigraphy are clarified. The sedimentary system of fan delta-lacustrine facies is mainly developed in the target layer in the area. The sedimentary facies plane has the characteristics of near source, fast phase change and small distribution range. The braided channel sand bodies of the fan delta plain and the underwater distributary channel sand bodies of the fan delta front have good uranium metallogenic potential.

The continental shale oil in the Da’anzhai section of the Ziliujing Formation in the Sichuan Basin has great exploration and development prospects. The sedimentary facies are diverse, the lithology is complex, and the vertical changes are fast. The understanding of the lithological differentiation combination mode and reservoir characteristics is unclear, which restricts the optimal selection of favorable shale oil reservoirs in the Da’anzhai section. Based on observations, thin section analysis, X-ray diffraction (XRD), vitrinite reflectance Ro testing, total organic carbon (TOC) content testing, physical property testing, rock pyrolysis, fluorescence analysis, and other experiments of four actual drilling cores in the central Sichuan Basin. By comprehensively analyzing mineral composition characteristics, as well as considering the content, occurrence, thickness of the shell layer, and its superimposed relationship with shale, seven lithological combination models for the Da’anzhai member in the central Sichuan basin were established (pure shale type, shale interbedded with floating shell limestone type, shale interbedded with millimeter scale shell limestone type, shale interbedded with centimeter scale shell limestone type, shale interbedded with centimeter scale shell limestone type, shale interbedded with shell limestone type, and pure shell limestone type). By integrating reservoir characteristic parameters such as TOC content, physical properties, oil content, and brittleness index, the reservoir characteristics of different lithological combinations were clarified. Based on the exploration and development practices of the Da’anzhai section and reservoir characteristics, a classification evaluation standard for reservoirs was established. It is believed that the lithological combination of shale interbedded with millimeter scale shell limestone and shale interbedded with centimeter scale shell limestone is the key layer for exploration and development, which has most favorable source reservoir combination, best physical properties, the highest oil saturation index(OSI) index, strong mobility, and good brittleness. The thick dark shale interval has the highest TOC content, good physical and oil properties, which is a potential interval for further exploration.

In order to explore the medication characteristics of expectorants in the Huatan prescriptions commonly used in treating ischemic stroke recently. “Huatan/Qutan/Ditan/Huotan/Daotan/Guntan/Banxia Baizhu Tianma Decoction/Xinglou Chengqi Decoction/Wendan Decoction/Erchen Decoction/Xiao xianxiong Decoction/Lingjiao Gouteng Decoction/Jieyu Dan” + “ischemic stroke/cerebral ischemia/cerebral infarction/cerebral embolism/cerebral thrombus” + “clinical” as the main topic on the China National Knowledge Network (from May 1, 1986 to April 1, 2024) was used to investigate the medication characteristics of expectorants, and selected literature meeting the criteria. Statistical analysis of the data was performed using Excel and IBM SPSS Modeler 18.0 software. The results show that Banxia and Tian nan-xing are the most frequently used expectorants in different stages of ischemic stroke, followed by Fuling, Shi chang-pu, Chenpi, and Gancao. The dosages of most expectorants are 10~15 g. In the analysis of Siqi and five flavors, Wen, Ping, Xin, Ku, and Gan have the highest frequency of occurrence in different stages of ischemic stroke. In the analysis of meridian tropism, the lung and spleen meridian have the highest frequency of occurrence. Most Huatan prescriptions are composed of 8~14 herbs in both the acute and rehabilitation stages, accounting for 82.51% and 78.05% of the total frequency, respectively. In the analysis of association rules, 25 traditional Chinese medicine combinations with strong correlation strength are obtained, and the most combinations of herbs are Huatan-Xifeng-Tongluo and Huatan-Huoxue-Qufeng. Most Huatan prescriptions are administered through the traditional decoction method and generally used in combination with Western medicine. It is concluded that the commonly used expectorants in Huatan prescriptions for treating ischemic stroke are mainly Banxia and Tian nan-xing, and the dosage ranges of most expectorants are 10~15 g. The number of herbs in Huatan prescriptions is mainly 8~14. The research results provide references and clinical data support for the application of expectorant Chinese medicine and Huatan prescriptions in the treatment of ischemic stroke and the development of research on treating ischemic stroke from the perspective of phlegm.

Medium-depth coaxial geothermal wells, as an efficient way to utilize geothermal energy, are now being vigorously promoted by many regions in China. In order to study its heat extraction performance and its influencing factors, COMSOL Multiphysics was used for modeling and orthogonal experimental analysis. The results show that the effects of all influencing factor on the heat extraction from geothermal wells are listed in the following order: ground temperature gradient, inlet flow rate, thermal conductivity of the backfill material, inlet temperature, and thermal conductivity of the inner tube. When designing geothermal wells, it is necessary to consider multiple factors to determine the optimal operating conditions. The radial temperature influence range of geothermal wells is about 10 m, which is a reference for the arrangement of multiple wells in the same area.

With the development of global oil and gas exploration and development to deep and ultra-deep wells, the problems such as underground high temperature environment and unreasonable selection of drilling parameters in field operation make the bit wear increasingly serious. In order to prolong the bit life and improve the rock breaking efficiency, a 3D simulation model of polycrystalline diamond compact(PDC) cutters marble was established, and the effects of different cutting depth, cutting speed and bit caster on the PDC cutters surface temperature and rock breaking efficiency were analyzed. The results show that the temperature rise of the cutting gear can be divided into three stages: ascending period, transitional period and stable period, and the crushing form of the rock changes from plastic to brittle when the cutting depth increases to a certain extent. With the increase of cutting speed, both temperature and crushing work ratio increase. With the increase of cutting depth and bit caster, the crushing work ratio increases and the temperature increases first and then decreases. The response surface method was used to optimize the cutting speed, cutting depth and bit caster, and the optimal parameter combination was given. The research results can provide guidance for efficient rock breaking of PDC bit in field.

Rainfall is one of the main factors affecting landslide stability. To explore the deformation and stability laws of unsaturated soil landslides under different rainfall conditions, based on the theory of saturation-unsaturation and the intensity reduction method, focused on a traction landslide in eastern Jiangxi. The rock and soil parameters of the landslide hazard body were determined through field investigations and laboratory tests. AutoCAD software was used to restore the terrain and geological conditions of the Tongshan landslide in Xishan Village, Zhengfang Town, as accurately as possible. A three-dimensional mathematical model of seepage-deformation coupling for the landslide was established. The dynamic process of seepage deformation and stability of the unsaturated soil landslide under various rainfall conditions (different intensities, durations, and post-rain stoppage) was simulated. The results indicate that the pore water pressure at the slope surface increases gradually with rainfall intensity and duration. The drainage velocity increases, the saturated zone gradually transforms into the unsaturated zone, and the displacement and deformation increase progressively. After the rainfall stops, leakage in the landslide hazard body exhibits a delayed response. The displacement deformation after continuous rainfall first increases and then decreases, while the displacement following intermittent rainfall shows periodicity during the short-term post-rain stoppage period. In terms of landslide stability, the reduction trend of the stability coefficient of the slope body strength under different rainfall intensities and durations is similar, but the stability coefficient under the same intensity varies, with the overall trend showing a gradual decrease with increased duration. After the rain stopped, the stability coefficient of the uniform rainfall slope body decreases initially and then increases, whereas the stability of the intermittent rainfall slope body exhibits periodic variations.

Due to factors such as temperature, pressure, and production rate, integrity issues like annular leakage in gas well tubing frequently occur frequently. In order to study the influence of working conditions on the process of downhole oil pipe leakage, a high temperature and high pressure oil pipe leakage simulation model was established based on field parameters and compared with the existing mathematical model of small hole leakage. Based on the simulation model, the influence of flow field change, leakage aperture, casing pressure difference and leakage environment on the leakage process was analyzed. The results show that the changes of flow field mainly focus on the inside of the leak hole and the inlet and outlet of the leak hole. With the increase of the leak aperture, the leakage quantity, leakage velocity, pressure and density inside the leak hole increase. The greater the pressure difference between tubing and oil jacket annulus, the greater the leakage amount and leakage velocity, and the more drastic the change of pressure and density. The gas velocity and pressure in the upper part of the annular protective fluid are greater than that in the annular protective fluid section.

Based on the detailed process mineralogy of gold ore from Jierwushake gold deposit in west Junggar, the selectability test was carried out. The results show that the valuable element in the ore is Au with a grade of 3.61 g/t. The types of gold minerals are natural gold, silver-gold, gold-tellurium and gold-selenium-silver ore, and the embedded states are encapsulated gold, fracture gold and intergranular gold. The particle size is mainly microparticle gold (0.2~10.0 μm), accounting for 96.96%, and the number of fine and above gold particles (>10 μm) account for 3.04%.The flotation-leaching combined process is recommended for mineral processing test: the Au grade of flotation-flotation concentrate is 53.14 g/t, and the recovery rate is 31.69%. After leaching the whole sludge of flotation tailings for 24 hours, the gold content in tailings is 0.20 g/t, and the leaching rate of gold operation is 89.56%, the Au total recovery rate of combined process is 93.31%, and the instructions are ideal.

To address the issue of inaccuracies in groundwater level predictions due to the insufficient consideration of groundwater-related factors, clustering methods for observation wells based on spatial distance, hydrogeological attributes, and a hybrid of distance and attributes were proposed. The significance of inter-well connectivity in groundwater level prediction was validated. Four models were designed, which were applied to simulate and predict groundwater levels in the karst water region of Jinan and compared with actual observations. The prediction results indicate that the combined model incorporating the connectivity characteristics of karst aquifers, known as convolution-long short-term memory(ConvLSTM), outperforms the traditional long short-term memory(LSTM) model. Among the models, the mix-multivariate-convolution-long short-term memory(M-MV-ConvLSTM) model, which accounts for wells of the same category based on the hybrid distance-attribute clustering results (characterized by strong connectivity), achieves the highest prediction accuracy and the smallest error. The average root mean square error is approximately 0.457, and the Nash-Sutcliffe efficiency is approximately 0.216, demonstrating a higher prediction accuracy than the traditional LSTM model. The research results is positioned to serve as a reference for real-time groundwater level prediction in karst regions.