Abstract.Aiming at the problems of high safety risks for personnel in fire rescue and the lagging response of traditional fire-fighting equipment, this paper designs an intelligent fire-extinguishing trolley control system with the STM32F103C8T6 microcontroller as the core. The system integrates a power supply circuit, motor drive circuit, multi-sensor detection modules (flame, temperature, smoke, obstacle avoidance) and a fire-extinguishing actuator to realize functions such as fire source positioning, automatic obstacle avoidance, sound and light alarm, and desiccant spraying for fire extinguishing. … Read more →

Abstract.In industrial HVAC (Heating, Ventilation, and Air Conditioning) systems, precise temperature control is critical for ensuring process stability, product quality, and equipment reliability. To address the demand for high-precision temperature regulation in localized microenvironments within industrial settings, a high-precision constant temperature control system was developed for industrial HVAC applications. This system utilizes an Arduino Uno microcontroller, integrated with DS18B20 digital temperature sensors and NTC thermistors, and employs a PID algorithm combined with relay feedback … Read more →

Abstract.With the growing adoption of electric vehicles in logistics, the electric capacitated vehicle routing problem has become increasingly important. The battery, as a core component of electric vehicles, directly affects operational costs due to its degradation over time. Therefore, incorporating battery degradation into vehicle routing optimization is essential. This study incorporates battery degradation cost into the objective function, establishing a comprehensive mathematical model that further reduces overall transportation costs. Meanwhile, a hybrid genetic neighborhood search algorithm is … Read more →

Abstract.Aiming at the energy bottleneck of long-term operation of deep-sea equipment, this paper proposes a high-voltage self-powered power generation device with new Ag₁.₉₉₅Au₀.₀₀₅Te₀.₇S₀.₃ nano-thermoelectric materials as the core. Through Au doping and Te/S ratio control, the ZT value of the material reaches 1.2 at 300 K, and the thermal conductivity of the lattice decreases below 0.4 W/m·K; Adopt TA32 titanium alloy shell+vacuum potting +Inconel 718 metal seal to realize 30 MPa pressure resistance. Trapezoidal array layout and micro-channel water cooling design make the thermal efficiency of the … Read more →

Abstract.With the widespread application of lithium-ion batteries in fields such as power, energy storage, and consumer electronics, the environmental pollution and resource waste issues caused during their manufacturing and recycling processes have increasingly drawn the attention of all sectors of society. To address the above problems, the research on environmentally friendly battery systems has been put on the agenda. Among them, solid- state batteries have received significant attention from both the academic and industrial communities due to their characteristics of having no organic electrolyte, … Read more →

Abstract.This study focuses on the energy conversion performance and transmission mechanism of new thermoelectric materials under high temperature gradient. Aiming at the problems of poor thermal stability and low figure of merit (ZT) of traditional thermoelectric materials in high temperature environment, a gradient composite structure (STBT) based on SrTiO₃ with high melting point and Bi₂Te₃ with chalcogenide was designed and constructed. Continuous transition of composition is achieved through spark plasma sintering (SPS) technology, forming an interface diffusion layer with good metallurgical … Read more →

Abstract.The accessibility of urban park green spaces holds significant importance for the daily lives of city dwellers and for evaluating urban liveability. This study integrates the Gaussian two-step floating catchment area method (G2SFCA) and network analysis to assess the accessibility distribution characteristics of park green spaces in Nanning City. The G2SFCA accounts for population density and park area to quantify per capita service capacity, while network analysis simulates real transport networks to evaluate distance- based and time-based accessibility. Results indicate significant … Read more →

Abstract.Football is a high-intensity competitive sport that involves the shoulders, torso, and lower limbs of the body. During movement, various parts of the body engage in complex coordination to achieve movements such as footwork, foot frequency, sprinting, turning, and jumping. This sport requires athletes to have highly developed physical fitness and is often accompanied by sports injuries. The seven test movements in Functional Movement Screening (FMS) include the basic movement patterns of the human body. It is a measurement tool used to evaluate the quality of athletes' movements and exercise … Read more →

Abstract.Under the backdrop of the Ministry of Education's "Education Digitalization Strategy Action," this study uses the Shanghai municipal key course Tolerance, Fit and Technical Measurement as a practical vehicle to construct a new four-dimensional integrated teaching paradigm: "AI Empowerment + Knowledge Graph + Virtual Simulation + Curriculum-based Ideological Education." By integrating the Tencent IMA smart teaching platform, the DeepSeek large model, and VR experimental technology, a smart teaching closed-loop covering the entire "pre-class-in-class-post-class" process was formed. Empirical … Read more →

Abstract.The pore structure of sandstone directly influences its physical and mechanical properties as well as its fluid seepage capacity, with temperature being a key factor in altering this structure. This study simulates thermal effects by heating sandstone samples in a muffle furnace to explore the evolution patterns of sandstone porosity under different temperatures. Standard sandstone samples were primarily selected, prepared, and then heated isothermally at various temperatures. Porosity was measured based on the physical process where non-wetting liquid, driven by pressure, overcomes surface … Read more →

Abstract.Overpressure is widely distributed in the Permian strata of the eastern Central Depression in the Junggar Basin and is closely related to hydrocarbon reservoirs. However, its genesis, evolution process, and controlling effects on reservoir formation remain unclear. Using comprehensive mudstone compaction curves and vertical effective stress-density crossplots, the formation mechanisms of abnormal high pressure in the Permian strata of the study area were analyzed. On this basis, the basin modeling method was applied to reconstruct the overpressure evolution for different lithologies in the … Read more →

Abstract.Casing drilling technology originates from mining wire-line coring technology. It uses casing as the drill string to perform drilling and casing running simultaneously without the need for pulling out. This technology can solve downhole accidents in complex formations and is suitable for large-sized boreholes. However, due to the characteristics of the casing, the joint connection strength is weak, the performance is poor, and the thread stress is complex and uneven, making it the weakest link of the pipe string. To fill the gap in the existing research on the influence of thread structure on … Read more →

Abstract.Mine ventilation is a crucial safeguard for safety in mine production. This paper provides an in-depth analysis of the current development status and future trends of mine ventilation technology in China. By reviewing the technological evolution, intelligent transformation practices, breakthroughs in key technologies, and the effectiveness of industry applications, it reveals the core values of mine ventilation systems in ensuring safety, enhancing energy efficiency, and promoting green development. Combining policy guidance, market demands, and directions of technological innovation, the … Read more →

Abstract.The critical liquid-carrying flow rate is a core parameter for the dynamic regulation and reasonable production capacity assessment of gas Wells. The accuracy of its calculation formula directly affects the early warning of liquid accumulation in gas Wells, the optimization of production systems and the development benefits. The critical liquid-carrying flow calculation formulas widely used at home and abroad (such as Turner model, Min Li model, etc.) often have significant deviations from the on-site measured values under complex working conditions (high sulfur content, high pressure, low … Read more →

Abstract.Shale reservoirs are characterized by low porosity, low permeability, and extensive natural fractures, where fluid migration and storage primarily depend on complex fracture networks. As the primary flow channels in shale reservoirs, natural fractures not only directly govern hydrocarbon migration and distribution but also significantly influence the expansion of hydraulic fracturing fracture networks and fracturing effectiveness. Given the pronounced heterogeneity, anisotropy, and fractal characteristics of shale fractures, traditional equivalent continuum models struggle to accurately … Read more →

Abstract.In response to the growing demand for composite materials with high specific strength, high specific stiffness, and lightweight structural characteristics, this paper systematically reviews the development and research progress of ultrasonic characterization techniques for fiber–matrix interfaces. The mechanical and durability properties of composites are largely governed by the interfacial bonding quality and its evolution mechanisms. However, interfacial damage is often concealed within the material, highlighting the urgent need for quantitative and nondestructive monitoring approaches. … Read more →

Abstract.This paper focuses on the problems of unclear oil and gas enrichment laws and difficult prediction of favorable zones in the tight reservoir of the Chang-7 member in the southwest of Wuqi Oilfield. It conducts research on reservoir characteristics and main controlling factors to provide a geological basis for efficient exploration in this area. By comprehensively applying technical methods such as detailed core observation, cast thin sections, scanning electron microscopy, high-pressure mercury intrusion, and basin simulation, the petrology, pore structure, and physical properties of the … Read more →

Abstract.Addressing the ambiguity surrounding the lower limits of effective reservoir properties in the L Member of the Biaoyanghe Formation, Tertiary System, in the Yaxia area, this study employs a multidisciplinary approach integrating property data, logging interpretation results, sedimentary facies analysis, and cast thin sections. It investigates the lower limits of effective reservoir properties and analyzes the primary factors governing their development. The study indicates that the lower limits for the L Member in the study area are: , porosity 8.2%, and permeability 1.5×10⁻³μm². Read more →

Abstract.Accurate lithology identification is a crucial prerequisite for sedimentary environment analysis, oil and gas exploration, and development. Traditional identification methods have problems such as low efficiency, high cost, or limited applicability. This paper proposes an ADASYN-IRMO-CatBoost combined model. Firstly, the ADASYN algorithm is used to perform adaptive sampling on the logging datasets of three wells in the southern Ordos Basin to solve the problem of data imbalance. Then, the Improved Radial Movement Optimization (IRMO) algorithm is utilized to optimize the hyperparameters of the … Read more →

Abstract.Against the backdrop of increasingly constrained global conventional oil and gas resources, the efficient development of shale gas, as a crucial unconventional alternative, is of paramount importance. Shale gas wells, particularly horizontal wells, exhibit a production decline behavior distinctly different from conventional gas wells, characterized by high initial rates followed by rapid decline, and ultimately transitioning to a long period of low-yield stabilization. This paper systematically investigates the production decline behavior of shale gas wells and the analytical methods of … Read more →