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This invention discloses a type of sodium titanate with a layered crystal structure, its preparation method, and its application in aqueous magnesium-ion batteries, belonging to the field of aqueous magnesium-ion battery technology. This invention uses sodium titanate with a layered crystal structure as the negative electrode material in aqueous magnesium-ion batteries. Due to its excellent chemical and structural stability, sodium titanate can achieve reversible magnesium deposition in aqueous magnesium electrolytes. 2+ Intercalation / extraction. This invention synthesizes Na via a hydrothermal method and a high-temperature annealing process. 2 Ti 2 O 5 And Na 2 Ti 3 O 7 Materials. In magnesium chloride electrolyte, both sodium titanate materials exhibit extremely low charge / discharge potentials (Na). 2 Ti 2 O 5 -1.3 to -0.6V vs. SCE; Na 2 Ti 3 O 7 (-1.5 to -1V vs. SCE) and good cycle stability. Furthermore, Na... 2 Ti 2 O 5 The half-cell exhibits a charge-discharge specific capacity of up to 213 mAh / g at a current density of 2 A / g, and maintains a high specific capacity of 150 mAh / g even at a high current density of 10 A / g. The sodium titanate of this invention is an ideal anode material for aqueous magnesium batteries, possessing both low cost and environmental friendliness, and shows great promise for application in the field of aqueous magnesium-ion energy storage.

The utility model provides a kind of dissolution cup automatic cleaning device, belong to the technical field of dissolution rate instrument, including base, base is provided with the moving platform with lifting function, moving platform is provided with multiple stirrer shafts that can be driven to rotate, base is provided with self-cleaning mechanism, self-cleaning mechanism includes wastewater tank and water bath, water bath is provided with cover plate, cover plate is provided with multiple dissolution cup bodies at equal intervals, each dissolution cup body is provided with top cover, the lower side of top cover and through-hole are respectively provided with cleaning piece and suction pipe, by the utility model, after the end of dissolution rate experiment, dissolution cup can be cleaned automatically, replace the repeated operation of traditional manual pouring, cleaning one by one, avoid the problem of hard to take due to large capacity of dissolution cup, with liquid, and dissolution cup does not need to be taken out from water bath, eliminate the risk of dissolution cup breakage due to hand slip, to reduce the security risk caused by glass breakage and solution contact.

The application provides a kind of class incremental neural network model aggregation method based on knowledge distillation, specifically comprising the following steps: step S1, obtains the incremental class information required for aggregation and the specific structure information of the model obtained by aggregation;Step S2, according to the incremental class information and the structure information, select multiple heterogeneous models as the model to be aggregated, and construct the initial aggregation model;Step S3, use unsupervised data to perform class incremental model aggregation on the model to be aggregated and the initial aggregation model, and update the initial aggregation model based on the class incremental distillation loss and feature filtering loss during aggregation until the incremental model is generated;This method supports the aggregation task between heterogeneous models to be aggregated, and only needs a single round of aggregation to make the aggregation model converge, greatly reducing the communication cost in the model aggregation process.

This application relates to the field of battery frames for new energy sweeper trucks, disclosing a novel battery frame structure for a new energy sweeper truck. The new battery frame mainly consists of a frame, protective plates, and brackets. The frame is located between the front water tank and the vehicle frame of the sweeper truck. The frame is a square frame structure with its bottom fixedly connected to the top side of the vehicle frame. A bracket for housing the new battery pack is provided inside the frame, and the bracket is fixedly connected to the frame. Protective plates are fixedly installed on both sides of the frame, and several reinforcing rods are fixedly installed on the outer side of each protective plate. Two sets of opposing first support arms are provided on one side of the bottom of the frame, and two sets of opposing second support arms are provided on the other side. In this application, the new battery frame can be arranged on the upper surface of the vehicle frame to expand the battery pack, thereby increasing the driving range.