Abstract: Disclosed is a floating platform integrating wave attenuation with marine energy power generation and a working method thereof, the platform includes a breakwater, a tuned damping wave energy converter, and an offshore floating wind turbine. The breakwater includes double-cylindrical-boxes and connecting bulkheads, and a moon pool area is formed in a middle of the breakwater; the offshore floating wind turbine and the tuned damping wave energy converter are both connected to the breakwater through a connecting rod. A circular groove is formed on an inner side of each of the connecting bulkheads of the breakwater. The breakwater provides the floating base and power generation environment for the offshore floating wind turbine and the tuned damping wave energy converter, and a plurality of the tuned damping wave energy converters can be disposed, and are evenly distributed beneath the offshore floating wind turbine.

Abstract: The present disclosure provides a multi-excitation-source axial-flux permanent-magnet motor with partitioned, hierarchical, and variable poles, and a variable-condition driving control system. The motor mainly includes a main magnetic pole and an auxiliary magnetic pole. The main magnetic pole is responsible for providing a main air gap flux and is connected in series with a dual-stator magnetic circuit. The auxiliary magnetic pole is responsible for adjusting an air gap field and is connected in parallel with the dual-stator magnetic circuit. Magnetic fluxes of the main magnetic pole and the auxiliary magnetic pole together constitute the air gap field. The present disclosure can control a flux path of the auxiliary magnetic pole by controlling the magnitude of a current applied to a field winding, thereby adjusting an air gap flux, expanding a speed range of the motor, and achieving variable-condition operation of the motor.

Abstract: A method for preparing an antibacterial and fresh-keeping fruit-packaging material through three-dimensional (3D) printing includes the following steps: dissolving gum arabic and pullulan separately in deionized water to obtain a gum arabic solution and a pullulan solution; subjecting a probiotic to cultivation, centrifugation, and resuspension to obtain a bacterial suspension; mixing the bacterial suspension, the gum arabic solution, and the pullulan solution to obtain a core layer solution; mixing polyvinyl chloride, a modifier, and a plasticizer to obtain a shell layer solution; injecting the shell layer solution and the core layer solution into two syringes, respectively; conducting coaxial 3D printing to finally obtain a coaxial 3D printing product with a core-shell structure; and conducting uniaxial 3D printing with the shell layer solution alone to form an outer layer on the coaxial 3D printing product to obtain the antibacterial and fresh-keeping fruit-packaging material with inner and outer layers.

Abstract: The present disclosure provides a device and method for recycling selective laser melting gradient powders, which comprises an ultrasonic powder suction device, a vertical support frame, the first vacuum pump, a sealing device, the second rotary motor, a powder storage bag, a vacuum box, a vibrating screen, a waste bin, the second vacuum pump, a powder conveying pipe, a cooling device, a water tank, and a spiral powder conveying pipe. This invention effectively reduces the risk of metal powder explosion through the cooling device's cooling. By multiple vibration screenings, this invention screens out the optimal gradient powders. The structure of this invention is simple, highly controllable, with easy-to-implement operating conditions, effectively avoiding the mixing and adhesion of different powders, improving the recovery utilization rate of gradient powders, and enabling the manufacturing of gradient materials with different compositions.

Abstract: A method of preparing a nanoscaled dye@ZIF-8-based colorimetric sensor is provided, in which a ZIF-8 nanomaterial is first prepared from Zn(CH3COO)2 and the 2-methylimidazole, and then the ZIF-8 nanomaterial is dispersed with ethanol and mixed with a colorimetric solution. The resultant mixed solution is added with polyethylene glycol-300 and applied to a substrate to obtain the nanoscaled dye@ZIF-8-based colorimetric sensor. This application further provides an evaluation method using the nanoscaled dye@ZIF-8-based colorimetric sensor, in which a back propagation neural network is established as the food quality evaluation model to evaluate the food quality.

Abstract: The provided is a method and system for trajectory prediction based on Cro-IntentFormer. The method starts by preprocessing vehicle trajectory data collected by sensors to produce raw data suitable for model input. Vehicles are treated as nodes, and the distance between vehicles serves as the basis for determining whether there is an edge between two vehicle nodes. A physical relationship graph is constructed and, along with the raw data, input into a spatio-temporal feature extraction module to obtain the spatio-temporal features of the trajectory. The spatio-temporal feature matrix is then input into an intent prediction module to determine the predicted intentions of the vehicles. Based on the intent information output by the intent prediction module, a semantic relationship graph is reconstructed and input, along with the raw data, into the spatio-temporal feature extraction module to derive the semantic features of the trajectory.

Abstract: The provided are a federated reinforcement learning (FRL) end-to-end autonomous driving control system and method, as well as vehicular equipment, based on complex network cognition. An FRL algorithm framework is provided, designated as FLDPPO, for dense urban traffic. This framework combines rule-based complex network cognition with end-to-end FRL through the design of a loss function. FLDPPO employs a dynamic driving guidance system to assist agents in learning rules, thereby enabling them to navigate complex urban driving environments and dense traffic scenarios. Moreover, the provided framework utilizes a multi-agent FRL architecture, whereby models are trained through parameter aggregation to safeguard vehicle-side privacy, accelerate network convergence, reduce communication consumption, and achieve a balance between sampling efficiency and high robustness of the model.

Abstract: The present invention belongs to the field of organophosphorus pesticide (OP) detection, and relates to a method for detecting an OP by a microfluidic chip based on a fluorescent sensing film. A porous fluorescent sensing film and the microfluidic chip are first constructed. The fluorescent sensing film is fabricated through layer-by-layer self-assembly of a platinum nanoparticle@oxalate-metal-organic framework (MOF) composite and a porous two-dimensional (2D) nanosheet, and has the functions of specifically detecting OPs and blocking macromolecular interferents. The microfluidic chip includes a sample channel, injection channels, reaction tanks, microfluidic channels, a detection tank, and an optical fiber channel, such that sample pretreatment and detection processes are integrated in the chip.

Abstract: A self-propelled full-automatic dense-planting vegetable transplanter and control method thereof includes a seedling taking and throwing mechanism, a box moving device, a crawler-type walking chassis, a seedling guiding device, a soil covering mechanism, a planting mechanism, and a dispersing device. The box moving device is mounted on the crawler-type walking chassis. The dispersing device is located on one side of the box moving device. The seedling taking and throwing mechanism includes a seedling taking and throwing movement mechanism and a linear movement mechanism. The linear movement mechanism is arranged above the box moving device. The seedling taking and throwing movement mechanism is configured to reciprocate between the dispersing device and the box moving device through the linear movement mechanism. The dispersing device is connected to the seedling guiding device.

Abstract: A self-adaptive control system for height and operation of ratooning rice stubble cutting includes a stubble righting device, a profiling contact sensor, a speed radar, and a controller; the stubble righting device is installed at the rear of the harvester, and is connected to the bracket by the stubble righting device hydraulic cylinder; the profiling contact sensor is configured to detect the height of the header above the ground and transmit data to the controller; the speed radar is configured to obtain and transmit speed information of the harvester to the controller; the hydraulic valve block is installed on the chassis frame and connected to the header lifting hydraulic cylinder and the stubble righting device hydraulic cylinder respectively; input terminals of the controller are connected to the profiling contact sensor and the speed radar, and output terminals of the controller are connected to the motor and hydraulic valve block.

Abstract: The present disclosure discloses an efficient and regenerable nano manganese remover, and a method for preparing same and application thereof, belonging to the technical field of wastewater treatment and reuse. The manganese remover of the present disclosure includes Fe3O4, RGO, SiO2 and EDTA. The Fe3O4 nanoparticles are supported on the surface of the RGO, the SiO2 coats the Fe3O4, and the EDTA is grafted on the SiO2. First, Fe3O4-RGO is prepared. Then, a TEOS-ethanol solution is dropwise added, and the resulting mixture is allowed to react to obtain Fe3O4@SiO2-RGO composite particles. Finally, an EDTA-water solution is dropwise added to obtain the manganese remover. The manganese remover prepared in the present disclosure is magnetic, and the preparation process is simple and easy for industrial production. The nano manganese remover can quickly remove manganese in manganese-containing wastewater. A small amount of the manganese remover can achieve a large adsorption capacity.

Abstract: A baling mechanism of a cotton picker and a control system of the baling mechanism are provided. The baling mechanism of the cotton picker includes a fixed box and a movable box. A fixed rocker arm, a fixed rocker arm driving cylinder, a fixed roller system and a fixed baling belt are arranged in the fixed box, and the movable box is hinged with the fixed box. A movable rocker arm, a movable rocker arm driving cylinder, a movable roller system and a movable baling belt are arranged in the movable box. A cotton bale forming chamber is jointly enclosed and formed by the fixed baling belt and the movable baling belt. In this disclosure, a multi-way valve is used to control the flow rate of oil circuits where the fixed rocker arm driving cylinder and the rocker arm driving oil cylinder are located, respectively.

Abstract: An economical optimization strategy construction method and system for lateral stability control of an electric vehicle, and a computer-readable storage medium are provided. The method includes: firstly constructing a lateral stability control system model with active allocation optimization to achieve the coordinational allocation between effective working areas of each part by means of a coordinational variable L; secondly, on the basis of the system model with active allocation optimization, designing a lateral stability controller under a model predictive control framework, where the designed objective function J makes the motion state of the vehicle track the expected value at steady state; and finally, considering the mapping relationship between the additional yaw moment and the coordinational variable L, constructing a three-dimensional surface, and analyzing the influence of the coordinational variable L, and determining the workflow of a regulator of the coordinational variable L.

Abstract: Disclosed are a doped colloidal metal oxide quantum wire and a preparation method thereof, a gas sensor, a gas sensor array, and use thereof, which relate to the technical field of gas sensors. In the preparation method, a main metal precursor, a doped metal precursor, an alcohol solvent, and a fatty acid surfactant are mixed, and a resulting mixture is subjected to a solvothermal reaction, to obtain the doped colloidal metal oxide quantum wire, wherein a main metal element in the main metal precursor is selected from Sn, Zn, W, In, Mo, Fe, Co, Ni, and Cu; a doped metal element in the doped metal precursor is selected from V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni and Cu; the doped metal element is different from the main metal element; and the solvothermal reaction is performed at a temperature of 150-300° C.

Abstract: A method for determining ciprofloxacin in a meat product based on an enzyme-linked upconversion fluorescence and potassium titanium oxalate system is provided. An enzyme-linked upconversion nanoparticle solution is mixed with an aptamer-bound magnetized polydopamine solution to obtain a fluorescence-ultraviolet dual-signal detection system. A fluorescence standard curve and a colorimetric standard curve for the ciprofloxacin content determination are created through the fluorescence-ultraviolet dual-signal detection system in combination with potassium titanium oxalate and hydrogen peroxide. A fluorescence intensity signal characteristic value and an ultraviolet absorbance signal characteristic value of a meat sample solution are determined. A ciprofloxacin content in the meat sample is calculated according to the fluorescence standard curve and the colorimetric standard curve.

Abstract: The present disclosure relates to a composite-strengthened heat-resistant and wear-resistant aluminum alloy and a preparation method thereof, and belongs to the field of preparation of high-performance metal materials. In the composite-strengthened heat-resistant and wear-resistant aluminum alloy of the present disclosure, an Al—Si—Cu—Mg alloy is adopted as a matrix, and microalloying elements for improving the heat resistance and a heat-resistant high-entropy alloy (HEA) for improving the wear resistance are added to allow composite strengthening. The preparation method mainly includes the following steps sequentially: smelting and alloying, blowing and refining, blow-compounding, die-casting molding, solution treatment, water quenching, and cryogenic and aging composite heat treatment.

Abstract: A method for recovering a protein from a surimi-rinsing liquid based on a low-temperature plasma technology is provided. The method includes: collecting fish flesh, and chopping the fish flesh to obtain surimi; adding the surimi to water, mixing for rinsing, centrifuging to collect a supernatant, which is the surimi-rinsing liquid; adjusting an input power of a plasma device to 300 W to 800 W, placing a spray gun of the plasma device below a liquid level of the surimi-rinsing liquid, turning on a power supply, and exciting plasma with air as a gas source, such that the plasma acts evenly on the surimi-rinsing liquid for 2 min to 6 min; and allowing the low-temperature plasma treated surimi-rinsing liquid to stand in an environment with a temperature of 10° C. or lower, centrifuging to collect a precipitate, such that the recovery of the protein from the surimi-rinsing liquid is completed.

Abstract: The present disclosure belongs to the technical fields of nanoscience and fluorescence sensing, and specifically relates to a preparation method of a paper-based sensor for detecting an ammonia gas, and a use of the paper-based sensor. In the present disclosure, Zn(PA)(BPE) is first prepared, and a porous structure on a surface of the Zn(PA)(BPE) is used to adsorb an ammonia gas to improve a reaction sensitivity of the ammonia gas; then a Zn(PA)@CNQD ratiometric fluorescent substance is prepared from Zn(PA)(BPE) and CNQD through embedding, and finally dissolved in ultrapure water (UPW) to obtain a solution; and the solution is added dropwise on a filter paper, and the filter paper is purged with nitrogen, such that the solution is loaded on the filter paper to obtain a ratiometric fluorescent paper-based sensor.

Abstract: A heat recovery system for hydrogen production with a solid oxide electrolysis cell, including a water storage tank, a solar cell panel, a low-temperature metal hydrogen storage tank, an evaporator, a high-temperature metal hydrogen storage tank, a heat exchanger, a solid oxide electrolysis cell, a separator, and a reactor is provided. After water in the water storage tank sequentially passes through the solar cell panel, the low-temperature metal hydrogen storage tank, the evaporator, the high-temperature metal hydrogen storage tank, and the heat exchanger for multi-stage heat exchange, water vapor reaching the working temperature enters the solid oxide electrolysis cell. The hydrogen generated after electrochemical reaction and unused water vapor flow out from the solid oxide electrolysis cell, firstly exchange heat with to-be-reacted water vapor through the heat exchanger and then enter the separator.

Abstract: The present disclosure provides a self-propelled full-automatic dense-planting vegetable transplanter and a planting control method thereof. The self-propelled full-automatic dense-planting vegetable transplanter includes a seedling taking and throwing mechanism, a box moving device, a crawler-type walking chassis, a seedling guiding device, a soil covering mechanism, a planting mechanism, and a dispersing device. The box moving device is mounted on the crawler-type walking chassis. The dispersing device is located on one side of the box moving device. The seedling taking and throwing mechanism includes a seedling taking and throwing movement mechanism and a linear movement mechanism. The linear movement mechanism is arranged above the box moving device. The seedling taking and throwing movement mechanism is configured to reciprocate between the dispersing device and the box moving device through the linear movement mechanism. The dispersing device is connected to the seedling guiding device.