With the wide application of AI in the field of education, how to effectively improve the quality of teaching, teacher-student interaction and personalised learning support has become a realistic and urgent research issue. In this study, we take the national blended first-class undergraduate course "Microcontroller Principles and Applications" as a practical scenario, and explore the design and application of an AI intelligent body for answering questions based on the COZE platform. The intelligent body integrates a large language model and multi-language interaction capabilities, supports course knowledge retrieval, Q&A recording and feedback processing, and takes into account both technical efficiency and humanistic care. The application effect shows that the intelligent body can realise instant Q&A around the clock, effectively extend the coverage of learning support, improve the timeliness of response, and provide new perspectives for the continuous improvement of course ideology and teaching.

 In this paper, a guided wave model of the L(0,1) mode of the pipeline is constructed based on COMSOL to explore the influence of different defect parameters on the echo characteristics, and numerical simulation is carried out using a 35 kHz Hanning window signal. Combined with MATLAB, a defect location algorithm was developed to conduct a comparative analysis of full-penetration cracks from multiple angles. The results show that the traditional damage coefficient method has significant instability in circumferential positioning, while the circular trajectory curve method can achieve higher accuracy at all angles, especially at 45 ° to 60 ° The research verified the effectiveness and innovation points of this method in improving the circumferential positioning accuracy of defects in guided wave pipelines

To address optical interference and safety hazards caused by rain and fog adhesion on glass surfaces, this study successfully prepared a nanocomposite spray with efficient anti-rain and anti-fog performance through a two-step modification process. Using nano-SiO? as the substrate, surface graft modification was first performed with 3-isocyanatopropyltrimethoxysilane (IPTS), followed by secondary modification with 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PFDTMS) to construct a low surface energy micro-nano structure. The IPTS modification temperature, IPTS mass percentage, PFDTMS addition amount, and modification time were optimized through orthogonal experiments. Under the optimal process conditions determined as follows: IPTS modification temperature of 50°C, IPTS mass percentage of 7%, PFDTMS addition amount of 1.5g, and PFDTMS modification time of 5h, the contact angle of the coating after curing on the glass surface reached 162.041°. After diluting the anti-rain and anti-fog spray stock solution by 2.3 times, the contact angle still maintained a superhydrophobic effect of 148.889°. Simulation experiments verified that the hydrophobic coating exhibits excellent waterproof and anti-fog properties. This research provides a promising solution for the development of high-performance anti-rain and anti-fog materials, with potential applications in automotive, architectural, and photovoltaic glass fields.

The aqueous extracts of different fermented teas ( Resveratrol, Res) were investigated for the improvement of insulin resistance in mouse 3T3-L1 preadipocytes and the molecular mechanism of insulin resistance.MTT method was used to detect the effects of different doses of aqueous extracts of different fermented teas on the proliferation of 3T3-L1 cells at 24 h. An insulin resistance model was constructed and oil red O staining was used to observe the effects of aqueous extracts of different fermented teas on the adipogenesis of 3T3-L1 cells; the effects of white and green tea on the adipocyte differentiation-related factors UCP-1, PGC-1α, PPAR, PGC-1α, PPAR, PGC-1α, PPAR and PPAR on adipocyte cell differentiation-related factors were examined using Real time PCR technology.-1α, PPARα, NRF1α, and β3-AR mRNA expression.The results of Oleoresin O showed that all four different fermented teas had certain effects on improving insulin resistance, among which the effects of white tea and green tea were more obvious.The PCR results showed that white tea up-regulated the expression of genes such as UCP-1, PPARα, and β3-AR, while green tea up-regulated the expression of UCP-1 gene, which may be the reason for its improvement of insulin sensitivity.

The current teaching of microcontroller course has the problems of no systematic integration of Civic-Political elements, the influence is only limited to the classroom, the lack of innovation in teaching means, and the imperfect effect assessment system. Aiming at these challenges, this study proposes the "one soul, two rings, three modes and four degrees" immersive course Civic-Political construction system, and explores the practice of the national first-class course "Microcontroller Principles and Applications" as an example. The system takes "humanistic spirit" as the core, integrates the elements of Civics and Politics into all chapters of the course, and also innovatively establishes a debate-style large-class flipped classroom teaching mechanism and a scientific grading system, and builds a "four-step, four-degree" implementation and evaluation mechanism. Practice and promotion have shown that the system is effective in cultivating moral integrity and innovation ability, enhancing students' ideological and political literacy and promoting the development of their professional skills, and providing new ideas for curriculum teaching reform.

Abstract  To improve the heat dissipation efficiency of power batteries under high-power operating conditions and ensure their safety and service life, this paper conducts optimization and simulation research on the heat dissipation structure of liquid cooling plates. Firstly, based on the thermal characteristics of a typical battery module, three-dimensional models of various liquid cooling plate flow channel structures (including traditional serpentine and labyrinthine structures) are established, with all structures adopting a unified parameter design. CFD simulation is used for numerical modeling, where the ambient temperature is set to 25°C, the inlet flow velocity is 0.5 m/s, and the outlet is configured as a pressure outlet with 0 Pa. The heat transfer forms are specified: natural convection between the battery pack and the environment with a constant heat transfer coefficient of 5 W/(m2·K), and heat conduction between the liquid cooling plate and the battery. Meanwhile, the contact surfaces between the cooling liquid and the liquid cooling plate, as well as between the liquid cooling plate and the battery, are set as fluid-solid coupling contact heat transfer surfaces. Secondly, the core performances of different flow channel structures in terms of temperature distribution, maximum temperature difference, and flow velocity distribution are analyzed emphatically. The simulation results show that the labyrinthine flow channel exhibits significant advantages: the maximum battery temperature is 27.73°C, which is 0.30°C lower than the 28.03°C of the serpentine structure; the maximum temperature of the liquid cooling plate is 25.23°C, 0.11°C lower than the 25.34°C of the serpentine structure, with a along-path temperature difference of only 0.23°C and a gentler temperature gradient. The average flow velocity of the cooling liquid in the labyrinthine flow channel remains 0.50 m/s, with uniform flow velocity distribution and enhanced turbulent disturbance, eliminating local low-velocity zones. It performs optimally in balancing heat dissipation uniformity, flow resistance, and heat-mass transfer efficiency, providing accurate theoretical basis and technical support for the efficient design of power battery thermal management systems.

The core of hazardous chemical management in university laboratories lies in storage, usage, and inventory alignment. Addressing key management challenges, an information system based on the Enterprise WeChat platform was developed to achieve lifecycle management of hazardous chemicals. The platform comprehensively records key stages such as application, usage, hazardous waste recovery, and allocation, while automatically planning residual quantity storage. Designed to be user-friendly and practical, it streamlines management workflows and supports online real-time monitoring. The system provides detailed data and clear operational records for safety supervision, ensuring management is traceable and evidence-based, thereby establishing a comprehensive protection barrier for laboratory safety.

With the continuous advancement of social and economic development, the automobile industry is exhibiting a trend of diversified growth, and the iteration rate of new models has significantly accelerated. This rapid industrial evolution has notably shortened the design and usage cycle of welding fixtures in automotive production lines, leading to such equipment entering a phase of premature obsolescence and abandonment. To address this issue, a systematic approach can be adopted: conducting comprehensive statistical analysis of abandoned idle welding fixtures, establishing a welding fixture database, and leveraging grouping technology to recombine and optimize the design of these fixtures. This enables them to meet the requirements of new production lines and facilitates their reintroduction into active use. This method not only effectively minimizes the waste of welding fixture resources but also substantially enhances the economic efficiency of the automotive manufacturing process.

Gold nanowires (GNWs) are widely used due to their many excellent properties. Because of their good saturable absorption properties, they can be used in laser mode-locking technology. Using the idea of realizing saturable absorption using its properties of localized surface plasmon resonance (LSPR), the saturable absorber properties of gold nanocrystals and gold nanorod materials were studied, and it was found that they have good saturable absorption properties. In addition, the saturable absorber is the core component of the passive mode-locked fiber laser, and its performance characteristics will greatly affect the output of the laser. By studying the saturable absorption characteristics of GNWs in the 1.56 μm band, it was found that they exhibit good saturable absorption characteristics at the wavelength of 1560 nm, so they can be applied in the laser field.

Against the backdrop of common prosperity, the high-quality development of higher vocational education serves as a key means to address the inadequate and unbalanced development. However, the high-quality development of higher vocational education in Jilin Province has been progressing slowly, constrained by such factors as imperfect governance structures, mismatched professional settings, single funding sources, severe brain drain, and insufficient in-depth integration of industry and education. Corresponding optimization paths are proposed: improving the cross-departmental collaborative governance mechanism, dynamically adjusting professional settings, expanding diversified funding channels, optimizing industrial layout to enhance talent attraction, and deepening the integration of industry and education to build a long-term cooperative ecosystem.