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To overcome the shortcomings of traditional water treatment technology, ultrafiltration (UF) technology has become a widely used process in the advanced treatment of drinking water, but the existing process has low flux, surface hydrophobicity, easy compaction and other shortcomings. In this study, green chitosan (CS) crosslinking modified UF membrane strategy is adopted to improve its anti-fouling and sustainable reuse in water treatment applications. In addition, modified UF achieved much better separation performances in treating natural surface water. By regulating the crosslinking reaction between CS and glutaraldehyde (GA), modified membranes with different concentrations of CS were prepared, and their structures and chemical properties were characterized. Humic acid was used as the model foulant to study the antifouling behaviors of the CS-coated UF membrane, and the anti-fouling mechanism was analyzed the crosslinking modification strategy of CS-GA provides a new way to alleviate the pollution of UF membrane.

The nickel-rich layered cathode materials LiNixM1-xO2 （x>0.8，M=Co，Mn，Al，etc.） have become the most promising cathode materials for hybrid electric vehicles and electric vehicle （EV） high energy density lithium-ion batteries in recent years due to its high specific capacity， high operating voltage， and low cost. The further development of electric vehicle technology requires the commercial application of lithium-ion batteries with a high energy density of approximately 350 Wh·kg-1 and a range of 500 km. However， the rapid capacity decay and structural instability of nickel-rich layered cathode materials hinder their market application. In this paper， the fundamental issue of performance degradation in nickel-rich layered cathode materials was summarized， and the latest progress and perspectives in improving the cycling stability of nickel-rich layered cathode materials through element doping， element ratio，surface reconstruction， particle arrangement，interparticle filling，particle size， single crystal transformation，and other aspects were summarized. It is pointed out that efforts could be made to construct high structural strength nickel-rich cathode materials through the coordination of elements and structures to fundamentally solve the structural and thermal stability problems under deep delithiated state， providing modified new processes and methods for nickel-rich layered cathode materials.

The diblock copolymer electrolyte PEGMEMAm-GMAn-Br （PGA-Br）， a copolymer of poly（ethylene glycol methyl ether methacrylate） （PEGMEMA）， and glycidyl methacrylate （GMA） were synthesised by designing the molecular structure of the polymer and using thermally-initiated free-radical polymerisation. The electrochemical performance were investigated. The results show that the ionic conductivity of polymer electrolyte is improved by PGA block or grafting on polymer electrolyte， and the ionic conductivity at room temperature reaches 1.05×10-4 S·cm-1. At the same time， PGA-Br block copolymer electrolytes exhibit a low glass transition temperature （-65 ℃）， a high thermal decomposition temperature， an electrochemical stability window of up to 5.1 V， and flame-retardant property. The Li|Li symmetrical solid-state battery assembled with PGA-Br copolymer electrolyte exhibits an enhanced electrode/electrolyte solid-solid interface， which can achieve uniform deposition of lithium metal and effectively inhibit the lithium dendrites growth. The LiNi0.8Co0.1Mn0.1O2 （NCM811） |PGA-Br|Li solid-state battery based on PGA-Br block copolymer electrolyte can achieve a high first cycle discharge specific capacity of 160.1 mAh/g at 0.1 C， and the capacity retention rate is as high as 91.5% after 100 cycles， and with a stable Coulombic efficiency of over 98.5%.

The widespread application of composite materials in blades also makes the force and stiffness characteristics of blades more complex than traditional blades. In order to reduce the dynamic stress and vibration level of rotor blades，it is necessary to analyze the dynamic characteristics of rotor blades. The overall parameters of the rotor and the aerodynamic parameters of the blade are designed. The CFD method is used to analyze the aerodynamic characteristics of the rotor in hover. The three-dimensional nonlinear elastic model of the blade is decomposed into a twodimensional linear profile model and a one-dimensional nonlinear beam model for dynamic characteristics analysis. The results show that the rotor can successfully pull up the 230 kg unmanned helicopter，the hover efficiency is greater than 0.65，the natural frequency of the blade under the working speed keeps a certain range with the frequency of the aerodynamic excitation force below the 8th order，avoid the speed resonance region and meet the requirements of the blade dynamics design.

In the coal mine emergency rescue auxiliary decision system, there are problems such as insufficient application of emergency plans, low application efficiency, and poor execution of rescue plans generated by the system. In order to solve the above problems, a design method for a coal mine emergency rescue auxiliary decision system based on emergency plans is proposed. This method uses information extraction technology based on large language models to extract key task elements from emergency plans, such as task names, triggering conditions, executing departments, and task content. This method forms meta tasks, and constructs a meta task library that classifies and stores meta tasks based on accident types and levels. When a coal mine safety accident occurs, this method uses semantic matching technology based on the SBERT model to classify and grade the accident based on the information collected on site. The method selects the meta task set that matches the current emergency needs from the meta task library. To improve the feasibility of tasks, this method combines meta tasks with real-time collected on-site data, constructs specific action instructions through instruction templates. The method uses task planning techniques to optimize and adjust the priority of instructions, and generate practical and feasible on-site rescue plans. The coal mine emergency rescue auxiliary decision system based on emergency plans fully utilizes the standardized content of emergency plans, forming a rescue plan closely integrated with on-site information and resource optimization. The system further improves the accuracy, scientificity, and intelligence level of rescue decision-making.