37results about How to "Solve uneven distribution" patented technology

The invention relates to a business credit evaluation and supervision method based on a multi-modal coevolution algorithm, and the method comprises the steps: collecting and cleaning multi-modal data, guaranteeing the data quality, uniformly storing the multi-modal data as a structural database, extracting features through cross-modal comparative learning, and enabling the features to be embedded into a dynamic multi-modal knowledge graph, a modal sharing network is used to extract and fuse modal sharing and specific features, consistency of modal feature distribution is optimized through adversarial learning, a global co-evolution credit scoring model is initialized, a dynamic multi-objective algorithm is used to optimize accuracy, robustness and interpretability of the model, and a credit scoring result is obtained. A causal reasoning model is introduced to analyze driving factors of enterprise credit changes, a causal relationship is established, a closed-loop feedback system is designed, a credit evaluation model is updated, adaptability is enhanced, an interpretable credit evaluation report is generated based on a generative adversarial network, and transparency and credibility are enhanced. According to the method, the accuracy and adaptability of credit assessment are improved, and the robustness and interpretability of an assessment result are ensured.

The invention relates to a three-dimensional channel structure design method of a micro-channel heat exchange module and a related device thereof. The method comprises the following steps: inputting a heat conduction coefficient and a convective heat transfer coefficient of a micro-channel heat exchange module into a Rayleigh-Ritz coupling model for kinetic analysis to obtain channel structure parameter data; performing temperature field and pressure field acquisition on the channel structure parameter data, and performing time sequence feature extraction through a double-space-time automatic encoder to obtain a fluid dynamic feature data matrix; inputting the fluid dynamic characteristic data matrix into a recursive window Bayesian network, and calculating a heat exchange efficiency weight coefficient, a fluid resistance weight coefficient and a heat transfer uniformity weight coefficient to obtain a channel optimization objective function; and according to the channel optimization objective function, carrying out global iterative calculation on the channel main body structure by utilizing a genetic algorithm, and carrying out local optimization on the shunting and converging structure by adopting numerical simulation to obtain a three-dimensional channel structure optimization scheme. According to the method, the optimization precision of the channel structure parameters is effectively improved.

The invention relates to an MXene-composite solid electrolyte, a preparation method and application thereof in the technical field of lithium batteries, and the method comprises the following steps: S1, preparing an MXene-polymer electrolyte; S2, mixing the MXene-polymer electrolyte prepared in the S1 with a nano solid electrolyte and a fibrosis binder, and performing fibrosis to obtain mixed powder; and S3, heating and calendering the mixed powder prepared in the step S2 to obtain the MXene composite solid electrolyte membrane. The preparation method comprises the following steps: forming an organic polymer electrolyte layer, namely MXene at polymer electrolyte, on the surface of MXene, and compounding nanocrystallized inorganic solid electrolyte powder, a binder and the MXene at polymer electrolyte into a film by using a dry preparation method. The problems that the nanocrystallized solid electrolyte powder is easy to agglomerate in the slurry and the internal distribution of the organic-inorganic composite electrolyte membrane in the electrolyte membrane is non-uniform are solved, and the introduction of the MXene material increases the conductivity of the electrolyte membrane, and the electrolyte membrane has high conductivity.

The invention discloses an airflow stirring device with a high-temperature sealing effect and a using method thereof. The airflow stirring device comprises a stirring container, a gas distributor arranged at the bottom of the stirring container, a driving stirring mechanism arranged on the stirring container and the gas distributor, and a multi-stage sealing assembly arranged on the gas distributor and the driving stirring assembly. The stirrer is matched with the gas distributor for use, the dispersion capacity is high, the circulation capacity is good, the problems of high-temperature caking and poor suspension effect of mixed materials are solved, the multi-stage sealing assembly is adopted, the sealing performance is enhanced, and the danger of explosion caused by sealing failure and gas leakage at the high temperature is prevented; the sealing reliability of the stirring device under severe working conditions such as high temperature is greatly improved, the possibility of explosion caused by gas leakage is reduced, the multi-stage cooling assembly is adopted, the temperature of a sealing part is reduced, downward heat transfer is reduced, and it is guaranteed that the device operates stably at the high temperature.

The invention discloses a novel pseudo-random number generation method based on multi-time-delay non-adjacent coupled lattices, comprising generating a chaotic sequence by cascading Logistic mapping and piecewise linear mapping (PWLCM); using an unscented Kalman filter algorithm to measure the errors of Chebyshev mapping and Logistic mapping, and compensating for the precision loss by adding random disturbances; using a time-delay time-varying function to disturb the time direction of the non-adjacent coupled mapping lattices, and solving the problems of short-period phenomenon, narrow parameter range and blank window occurring in the chaotic system by using a cascaded multiple chaos and error compensation method.

The invention provides a spraying disc for PCB development, and relates to the field of PCB processing, the spraying disc comprises a supporting seat, a mounting rack arranged on the supporting seat, a hollow plate arranged on the mounting rack, a nozzle arranged on the hollow plate, a fixing mechanism arranged on the supporting seat, and a wiping mechanism arranged on the supporting seat; and the fixing mechanism comprises a connecting rod arranged on the mounting frame and a fixing plate arranged on the connecting rod. In order to solve the problem that in the prior art, when a PCB is machined, liquid is likely to be accumulated on the surface of the PCB, and the accuracy of a circuit pattern is affected, the fixing mechanism and the wiping mechanism are arranged, so that the PCB can be conveniently wiped; according to the PCB machining device, accumulated liquid generated during PCB machining can be thoroughly discharged, the problem that in the prior art, liquid medicine on the surface of a PCB is not evenly distributed is solved through the arranged fixing mechanism and the arranged wiping mechanism, and the problem of manual discharging in the prior art is solved through the arranged fixing mechanism and the arranged wiping mechanism.

The invention discloses a welding device for goods shelf laminate forming, and particularly relates to the technical field of goods shelf laminate machining, the welding device comprises a fixing table, reinforcing ribs and a laminate frame, a mounting box is fixed to the upper end of the fixing table, two first rodless air cylinders are fixed to an inner cavity of the mounting box, and a matching plate is fixed to the output ends of the two first rodless air cylinders together; and a set of limiting grooves are formed in the upper side of the matching plate, a plurality of discharging components matched with the limiting grooves are slidably arranged in an inner cavity of the mounting box, downward pressing components are fixed to one ends of the multiple discharging components, and a welding component is mounted on one side of the fixing table. According to the welding device for goods shelf laminate forming, through mutual cooperation of the matching plate, the limiting groove, the discharging part, the pressing part and the welding part, the problem that reinforcing ribs are distributed unevenly during welding can be solved, the reinforcing ribs can be pressed in an inner cavity of a laminate frame while automatic discharging is conducted, and the welding quality is improved. And the problem of welding precision reduction caused by reinforcing rib movement is prevented.

The utility model discloses a rapid reconstruction device for a sand table model, which comprises a frame body, the upper end part of the frame body is provided with a display conveyor belt, the upper part of the display conveyor belt is horizontally distributed, the feeding end of the display conveyor belt is provided with a material returning unit, the discharging end of the display conveyor belt is provided with a cover plate, and the material returning unit is matched with a leveling scraper blade in a sliding manner. A clamping groove matched with the leveling scraper is formed in a shell of the material returning unit, an inserting opening is formed in a cover plate, a blocking plate is arranged in the inserting opening in a matched mode, and an operation area is formed between the leveling scraper and the blocking plate. Sand, props and the like in a used sand table model can be automatically separated, and the sand is flattened in a micro-amplitude vibration mode, so that the presentation effect is improved, and the problem of non-uniform distribution is solved; because the reconstruction speed of the sand table model is high, the scene can be changed for multiple times in the psychological guidance process, and the psychological guidance time is saved.

The present invention belongs to the field of laser scanning, and specifically relates to a design method for a continuous rotating cylindrical self-driving car laser radar galvanometer, including: establishing a laser irradiation spiral line; obtaining the normal vectors of all reflection points on the laser irradiation spiral line by calculating the position of the laser and the corresponding angle to be scanned; constructing a spiral reflection surface according to the positions of all reflection points on the laser irradiation spiral line and their normal vectors, and winding a spiral reflection mirror along the spiral reflection surface. The normal vector of each reflection point of the laser irradiation spiral line in the galvanometer designed by the present invention is designed separately, thus solving the problem of deformation of the traditional galvanometer scanning.

The utility model relates to the technical field of chemical product mixing, and discloses a mixing device for chemical product production, which comprises a reaction kettle, the top of the reaction kettle is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a first fixed column, and the outer wall of the first fixed column is rotatably connected with a connecting column. A stirring blade is fixedly connected to the interior of the connecting column, a spoiler is fixedly connected to the inner wall of the reaction kettle, the outer wall of the connecting column is rotatably connected to the interior of the reaction kettle, a plug is slidably connected to the interior of the reaction kettle, and a handle is fixedly connected to the side wall of the plug. According to the reaction kettle, the first motor drives the first fixing column to rotate, the first fixing column drives the connecting column to rotate and drives the stirring blades to rotate together, and the spoiler is fixed in the reaction kettle, so that the effects of spoiling and stirring are achieved, and the problem that reactants are non-uniformly mixed in a container due to the absence of a device with spoiling is solved; the stirring quality is improved.

The invention discloses a novel back helium gas inlet device and an application method thereof, and belongs to the technical field of semiconductor equipment, the novel back helium gas inlet device is arranged in a semiconductor equipment cavity, a reflecting plate is arranged in the semiconductor equipment cavity, and a gas inlet for introducing and discharging helium is formed in the reflecting plate; the novel back helium inlet device comprises a light-transmitting shunting buffer plate, the light-transmitting shunting buffer plate is arranged above the reflecting plate and below the wafer, and a gap is formed between the upper portion of the light-transmitting shunting buffer plate and the wafer. A plurality of vertically-through air holes are distributed in the range, corresponding to the wafer, of the light-transmitting shunting buffer plate; a groove is formed in the bottom surface of the light-transmitting shunting buffer plate to form a gas channel for connecting the air holes; and the gas channel is communicated with the gas inlet pipe through the gas inlet. According to the invention, the flow velocity of the back surface of the wafer is effectively reduced, the situation that the wafer is blown to be deflected and scrapped is avoided, uniform distribution of process gas is ensured, and the cooling rate is accelerated.

The utility model discloses injection molding machine waste gas collecting device, including main body frame, shaking mechanism, flow regulating mechanism and adjusting auxiliary mechanism, the shaking mechanism includes processing jar, drive motor, support axle, connecting hose and adding pipe, the flow regulating mechanism includes adjusting pipe, inner rotary frame, threaded rod, thread bush, moving frame, layer whirlpool board and inner fixed frame, make processing jar do regular shaking movement through drive motor drive support axle, effectively solved the problem of uneven distribution of waste gas in traditional device, and this dynamic shaking design promotes the full mixing contact of waste gas and auxiliary agent, eliminates the airflow dead angle and stratification phenomenon in processing jar, adopts the accurate transmission design of threaded rod and thread bush, drives moving frame to do linear motion through the rotation of inner rotary frame, makes the clearance between layer whirlpool board and inner fixed frame accurate and adjustable, and this design solves the problem that the waste gas flow of traditional device is difficult to accurately regulate.

The invention provides an absorption tower and a carbon dioxide capture system with the same, the absorption tower comprises: a tower body, the tower body is provided with a gas inlet and a gas outlet which are arranged at an interval; the filler structure is arranged in the tower body; the eliminating structure is arranged on the side wall of the tower body and comprises an opening which is formed in the side wall of the tower body and corresponds to the filler structure, a roller arranged at the opening, a collecting structure covering the opening and a backflow structure communicated between the collecting structure and the tower body. According to the technical scheme provided by the invention, the problem of non-uniform distribution of gas and liquid phases in the filler layer in the prior art is effectively solved.

The utility model relates to the related technical field of rack adjusting pressing block cooling mechanisms, and one embodiment of the utility model provides a rack adjusting pressing block cooling mechanism which comprises a frame body, a bottom frame and a shell, the bottom frame is fixed outside the frame body, the shell is arranged in the frame body, a cooling assembly is arranged in the shell, a first conveying belt is arranged in the frame body, and a second conveying belt is arranged in the frame body. The first conveying belt penetrates through the interior of the shell, the conveying positioning assembly is arranged on the frame body, the discharging assembly is arranged outside the frame body, the cooling assembly comprises an inner cover, the inner cover is arranged in the shell, a cavity is formed in the top of the inner cover, a water inlet pipeline is arranged at the top of the inner cover and extends to the exterior of the shell, and spraying holes are formed in the bottom in the cavity. By means of the technical scheme, the technical problems that in the prior art, due to the fact that discharging is not smooth, the pressing blocks are prone to being stacked near the discharging opening, and the stacked pressing blocks are squeezed mutually, and deformation can be possibly caused are solved.

This invention relates to the field of IoT device identification and machine learning technology, and proposes an IoT device identification method and system based on incremental federated learning. The method includes: Step S1, each gateway node preprocesses and extracts features from network traffic to generate local feature vectors; Step S2, a single-layer self-organizing incremental learning neural network is used to dynamically cluster the feature vectors, and prototype data is selected to construct a local prototype set; Step S3, each node uploads the prototype data to a central server, which aggregates and distributes the global prototype set; Step S4, each node combines local data and global prototype data to perform local incremental training on the global model and uploads the model parameters; Step S5, the server uses a federated averaging algorithm to aggregate the model parameters, generate a new global model, and distributes it, repeating S4 to S5 until convergence; Step S6, if identification fails when a new device connects, the local clustering model is updated and a new round of training is triggered, enabling the global model to acquire the ability to identify new devices. The system includes: multiple gateway nodes (including data preprocessing, feature extraction, incremental clustering, and local training modules) and a central server (including data aggregation, model aggregation, and model distribution modules). Through the above scheme, the present invention achieves collaborative device identification that dynamically adapts to new device access, avoids catastrophic forgetting, and protects data privacy.

This invention provides a flow-diverting device, a heat exchanger structure, and an air conditioner, belonging to energy-saving refrigeration and air conditioning equipment. The flow-diverting device includes a flow-diverting plate structure with flow-diverting channels. Each flow-diverting channel has a first heat exchange medium inlet and N1 first heat exchange medium outlets. The flow-diverting channels divide the heat exchange medium at the first heat exchange medium inlet into N1 streams, which are then discharged one-to-one from the N1 first heat exchange medium outlets. The flow-diverting plate structure also includes a heat insulation structure, which separates the flow-diverting plate structure into two or more different heat insulation regions. The flow-diverting plate structure also includes a set flow path, which allows the heat exchange medium to flow into the heat exchanger and discharges the flowing heat exchange medium. The set flow path and the flow-diverting channels are respectively located in different heat insulation regions. According to this invention, parasitic heat conduction can be reduced, effectively decreasing the heat exchange between the heat exchange medium in the set flow path and the flow-diverting channels through the plate of the flow-diverting plate structure.

The invention discloses a diamond wire production device for cutting, which comprises a plating solution tank and an electroplating solution recovery device, an electroplating tank is arranged in the plating solution tank, the interior of the electroplating tank is used for electroplating a diamond wire bus, a recovery tank is arranged in the plating solution tank, the recovery tank is fixedly connected with the electroplating tank, and the electroplating solution recovery device is connected with the electroplating tank. A carborundum box is fixedly connected to one side of the outer wall of the plating solution tank, a through hole is formed in the bottom of the side face of the carborundum box, a sand conveying pipe is fixedly connected to the position of the through hole of the carborundum box, the sand conveying pipe is connected with the plating solution tank in a penetrating mode, a sand blasting flow divider is fixedly connected to the bottom end of the sand conveying pipe, and the sand blasting flow divider is electrically connected with a start-stop controller. The start-stop controller is used for controlling outflow and stop of carborundum in the sand blasting flow divider, the start-stop controller is fixedly connected to the side edge of the plating solution tank, and the device solves the problems that current diamond wire production equipment is single in function, and the carborundum is not evenly distributed on a bus.

The invention provides an absorption tower, which comprises: a tower body in which an absorption section is arranged; the first gas inlet is formed in the bottom of the tower body; the gas outlet is formed in the top of the tower body; the air inlet pipe comprises a main pipe body and a branch pipe, the main pipe body is communicated with the first air inlet, the first end of the branch pipe is connected with the main pipe, and the second end of the branch pipe is connected with the tower body and corresponds to the absorption section. And the gas enters the main pipe body, then is shunted to the branch pipe and is arranged corresponding to the absorption section through the second end of the branch pipe. According to the technical scheme of the invention, the problem of non-uniform distribution of gas and liquid phases in the filler layer in related technologies is effectively solved.

The invention discloses a method for preparing milk powder containing phthalate plasticizer and its application, wherein the method comprises: dissolving the phthalate plasticizer in an alcohol solution to obtain a plasticizer solution; dissolving a theoretical value of the plasticizer solution in a dairy solution, stirring it for the first time and then standing it, and stirring it for the second time to obtain a milk base liquid containing the plasticizer; and using the milk base liquid containing the plasticizer to prepare milk powder, wherein the milk powder contains the phthalate plasticizer. The method overcomes the problem that the phthalate plasticizer is difficult to dissolve in the emulsion, and the phthalate plasticizer is evenly distributed in the prepared milk powder, meeting the characteristic requirements of the standard substance.

The utility model relates to a tablet friability measuring device, which comprises the following working procedures: firstly, building the device, mounting a transmission motor, a plurality of gears, a test cylinder and the like on a support frame body and a connecting frame body, mounting a partition plate in the test cylinder to form a test cavity, sealing the cylinder and mounting a miniature vibrator. The sealing cover is opened, the tablets are placed in the sealing cover and then tightened, the transmission motor is started, the motor drives the gear to enable the testing barrel to rotate, the tablets are subjected to uniform force in the testing cavity to complete friability testing, after testing is finished, the motor is closed, the miniature vibrator is started to shake off residual chips, and next testing can be conducted after the sealing cover is opened and the barrel is cleaned. The device can accurately test the friability of the tablets, and is convenient to operate and efficient to clean.

The utility model relates to the technical field of ceramic tile production equipment, and discloses a dry granule distribution platform and a dry granule machine, the dry granule distribution platform comprises a platform support, a driving roller, a driven distribution roller, a feeding belt and a distribution driving mechanism, the diameter of the driven distribution roller is smaller than that of the driving roller, and the driven distribution roller is located at the downstream of the driving roller; the platform support is provided with a straightening structure located behind the driven material distribution roller, and the straightening structure is used for maintaining the straightness of the driven material distribution roller. The straightness of the small-diameter driven material distribution roller is maintained by arranging the straightening structure, the consistent tightness of the feeding belt in the operation process is guaranteed, the speed difference of dry particles caused by different tightness degrees of the feeding belt is avoided, the problem that the dry particles are not uniformly distributed on the feeding belt is solved from the source, and the production efficiency is improved. The distance between each point on the surface of the driven material distribution roller and the feeding belt is kept consistent, so that the dry particles are uniformly extruded and pushed when passing through the material distribution roller, and the material distribution uniformity is further improved.

The invention discloses a forming method for improving the density of a fiber-reinforced ceramic-based composite material, and belongs to the technical field of composite material preparation. According to the method, the specific precursor mixture is selected as an impregnation matrix material and then combined with a high-temperature pressure sintering process, process parameters of different composite stages are regulated and controlled, the problem that a matrix formed by cracking of polyborosilazane in an existing process is non-uniform in distribution is solved to the maximum extent, internal defects of the material are reduced, and the performance of the material is improved. The non-uniform degree and the density of the composite material are greatly improved, and the damage degree to the fibers is reduced by reducing the number of compounding times, so that the fibers can exert better reinforcing and toughening effects, the tensile property, the bending property and other mechanical properties of the composite material are effectively improved, and finally the high-performance silicon-boron-nitrogen fiber reinforced silicon-boron-nitrogen composite material can be obtained.

This invention belongs to the field of satellite remote sensing and red tide detection technology, and discloses an integrated method and system for generating and identifying broadband 3D samples of dominant red tide species. The method constructs an integrated model for generating broadband 3D red tide samples and identifying dominant species based on deep learning. It utilizes a red tide image generation module based on spectral feature transfer to obtain expanded samples of different dominant red tide species. A red tide dominant species identification module is constructed by integrating multi-scale feature extraction and cross-spatial attention mechanisms. The module is trained using a student-teacher semi-supervised learning model. Experimental results show that the model has good adaptability and can effectively identify three dominant red tide species: *Noctiluca scintillans*, *Noctiluca chloroticus*, and *Hacochloa erythrophora*, with an overall identification accuracy of 94.48%, which is 3.52%–8.66% higher than other comparative methods, providing a basis for red tide prevention and management.

This invention discloses a spray air intake device for a tubular PECVD equipment, comprising a reaction chamber, and an air intake spray plate, a graphite boat, and an exhaust plate disposed within the reaction chamber. The air intake spray plate and the exhaust plate are respectively installed above and below the graphite boat, or respectively installed below and above the graphite boat. The air intake end of the air intake spray plate extends to the outside of the furnace opening and the outside of the furnace tail of the reaction chamber. The front end of the reaction chamber is provided with a furnace door flange, and the rear end of the reaction chamber is provided with a furnace tail flange, which has multiple exhaust ports. During the process, the process gas is transported into the reaction chamber through the air intake spray plate, flows downward through the graphite boat, enters the exhaust plate, and is finally discharged through the exhaust ports on the furnace tail flange. This invention features a compact structure, convenient operation, high safety, and high gas distribution uniformity, effectively reducing the waste of process gas.

This application relates to the technical field of precast concrete curing equipment, and discloses a temperature- and humidity-adjustable precast concrete temperature-controlled curing box, including a support ring plate. A curing box is fixedly connected to the upper surface of the support ring plate, and a support block is fixedly connected to the side of the curing box. A servo motor is fixedly connected to the upper surface of the support block, and a threaded rod is fixedly connected to the output end of the servo motor. An internal threaded cylinder is threadedly connected to the surface of the threaded rod, and a movable plate is fixedly sleeved on the surface of the internal threaded cylinder. The operation of the servo motor drives the threaded rod to rotate, and the rotation of the threaded rod drives the movable plate to move through the internal threaded cylinder. The movement of the movable plate drives the second annular tube and the first annular tube to move respectively. When the second annular tube moves to the leftmost position, the servo motor drives the movable plate to move again through the internal threaded cylinder. The movement of the movable plate then drives the second annular tube and the first annular tube to move in opposite directions, which solves the problem of uneven steam distribution to a certain extent.

The invention discloses a capacitor and a preparation method of the capacitor. The capacitor comprises a substrate and at least one conductive structure, the at least one conductive structure is stacked on the substrate in the thickness direction of the substrate, each conductive structure comprises a single-chip core and a conductive foil, the single-chip core comprises a negative electrode area, a middle area and a positive electrode piece which are sequentially connected in the first direction, the middle area is coated with an insulating layer, and the conductive foil is arranged in the middle area. The conductive foil comprises a foil body and a negative pole piece which are connected along a first direction; the foil body is laminated and attached to the negative electrode area, one part of the negative electrode piece is laminated and attached to the insulating layer of the middle area, the other part of the negative electrode piece and the positive electrode piece are distributed in a spaced mode in the second direction, and the positive electrode piece and the negative electrode piece are electrically connected with the substrate. According to the capacitor disclosed by the invention, the conductive foil is connected with the single core, so that the thickness of the capacitor is reduced, the equivalent series resistance of the chip-type laminated solid aluminum electrolytic capacitor is reduced, and the problem that current and heat are not uniformly distributed in the capacitor is also solved.

The invention relates to the technical field of crushing equipment, and discloses powder choline chloride production raw material crushing equipment which comprises a barrel body, a discharging pipe is arranged at the bottom of the barrel body, a feeding funnel is arranged at the top of the barrel body, a screening net plate is arranged in the barrel body, and a mounting seat is arranged in the barrel body; a second rotating rod is movably mounted at the top of the mounting base, a first rotating rod is mounted at the top end of the second rotating rod through a transmission, and a crushing rod is arranged at the end, extending to the top of the screening net plate, of the second rotating rod. And therefore, the raw materials are stirred to the middle of the screening net plate through the material stirring part, the materials make full contact with the crushing rods, raw material accumulation is avoided, and the comprehensiveness and uniformity of crushing are improved.

The utility model belongs to the technical field of irrigation equipment, and particularly relates to a portable runway tree irrigation device which comprises a water tank, a first protective cover is fixedly connected to the top of the water tank, a first motor is arranged in the first protective cover, the output end of the first motor is fixedly connected with a rotating column, and the rotating column is rotationally connected to the interior of the water tank. A stirring plate is fixedly connected to the outer wall of the rotating column, a through hole is formed in the stirring plate, stirring blades are fixedly connected to the outer wall of the rotating column, a water inlet pipe is fixedly connected to the top of the water tank, a switch valve is arranged in the water inlet pipe, and the water inlet pipe penetrates through the water tank and extends into the water tank. According to the device, through cooperation of the first motor, the rotating column, the stirring plate and other components, the device can achieve the effect of rapidly stirring and mixing a nutrient solution and water, the problem that the nutrient solution is not evenly distributed when the device adds the nutrient solution for irrigation is solved, and then the practical performance of the device is improved.

The embodiment of the invention provides a robot task generation method and system and computer equipment. The method comprises the steps that a task space tuple used for describing a robot task is determined; based on historical task data of description data corresponding to a preset task description item in the task space tuple, performing data sampling on the preset task description item to obtain a task description data set at least containing sampling data corresponding to the preset task description item; and providing the task description data set as a constraint condition for a proposal generator to generate a target task proposal. According to the method provided by the invention, the task space tuple is predefined for the robot task proposal, and the proposal generator is forced to generate the corresponding target task proposal based on the constraint of the task description data set through the set data sampling mechanism. Through the task proposal forcibly generated by the method, uncovered long-tail scenes, objects and skill combinations are explored, and the problem of non-uniform distribution of existing training data is solved.

This invention provides a method and system for harmonic mitigation in islanded microgrids. The method includes modeling an average model of the inverters in an islanded microgrid system with multiple inverters connected in parallel and containing nonlinear loads using the state-space averaging method; optimizing the inverter control using a low-frequency voltage compensation controller and a high-frequency disturbance compensation controller optimized based on the gradient descent method based on the average model of the inverters; estimating the state variables and harmonic disturbances of the islanded microgrid system using a second-order linear state observer designed based on the bandwidth tuning method; and mitigating the microgrid voltage harmonics caused by nonlinear loads using a linearized active disturbance rejection control method based on second-order sliding mode based on the estimated state variables and harmonic disturbances of the islanded microgrid system. This invention significantly improves the dynamic performance and robustness of harmonic compensation in microgrids.