155results about How to "Maintain uniformity" patented technology

The invention discloses a full-automatic ultrahigh-pressure sludge treatment filter press which comprises a main beam, a plurality of groups of filter plates are slidably mounted in the main beam, a thrust plate and a mounting plate are fixedly mounted at two ends of the main beam respectively, a hydraulic rod is fixedly mounted at one end of the mounting plate, a piston rod of the hydraulic rod penetrates through the mounting plate, and a pressing plate is fixedly mounted at the end of the piston rod. Guide grooves are formed in the upper surfaces of the filter plates, the mounting plates and the thrust plates, synchronizing mechanisms are slidably mounted in the guide grooves, purging mechanisms are slidably mounted in the synchronizing mechanisms, V-shaped cylinders are fixedly mounted on the lower surface of the main beam, and sludge shaping mechanisms are rotatably mounted in the V-shaped cylinders. Through the design of the synchronizing mechanism, the sludge shaping mechanism and the purging mechanism, the function of automatically cleaning the filter plate is achieved through purging of high-pressure gas, and then the continuous operation capacity and the cleaning efficiency of the equipment are improved.

The invention provides an integrated heat recycling type catalytic micro-combustor for marine equipment and a preparation method, and relates to the technical field of clean fuel catalytic combustion under the microscale. The integrated heat recycling type catalytic micro-combustor comprises a micro-combustor shell, and two sets of symmetrically-arranged partition plates are arranged on the inner side of the micro-combustor shell; the two sets of partition plates divide the interior of the miniature combustor shell into a first preheating channel, a gas outlet channel and a second preheating channel, the gas outlet channel comprises a combustion chamber and a gas outlet which are sequentially communicated, a bluff body is arranged on the inner side of the gas outlet channel, and concave cavities are formed in the partition plates and correspond to the combustion chamber in position. The inner side of the air outlet channel and the outer side of the bluff body are coated with a catalyst; according to the invention, the preheating channel is arranged to set the micro-combustor to be in a backheating form, unburned gas in the micro-combustor is preheated by tail gas after gas intake, so that the gas obtains a higher initial temperature in the micro-combustor, and the design optimizes the high-speed limit of mixed gas in the micro-combustor, strengthens the heat cycle in the combustor and effectively reduces the heat loss.

The invention discloses a compressor air cylinder base grinding device, and relates to the technical field of air cylinder machining and grinding, the compressor air cylinder base grinding device comprises a machining base and further comprises a clamping device, a machining frame is fixedly installed at the bottom of the machining base, a servo motor is fixedly installed on the front side of the machining frame, and a lead screw is fixedly installed at the output end of the servo motor; a moving block is slidably installed on the inner wall of the machining frame and is in threaded connection with the lead screw, the clamping device comprises an electric push rod, a stabilizing plate, a detection rod, a detection plate, an elastic telescopic block, a shielding plate, a button and a limiting hole, the shielding plate moves to break away from contact with the button and release shielding of the button, the clamping force of the stabilizing plate is controlled through limiting, and the clamping force is adjusted to be larger than the clamping force of the limiting hole. Therefore, clamping pressure is uniform and moderate, deformation of the workpiece can be avoided, button shielding can be relieved only after the workpiece is clamped stably, and accidental starting of grinding equipment caused by manual mistaken touch can be reduced.

The invention provides anti-scattering water-guided laser cutting fluid as well as a preparation method and application thereof. The anti-scattering water-guided laser cutting fluid comprises the following components in parts by weight: 0.1-1 part of an anti-scattering agent; 0.01 to 0.1 part of a foam discharging agent; 1-5 parts of a refractive index regulator; and 80-99 parts of ultrapure water. The anti-scattering agent is a polymer; the foam removing agent is one or more of hydroxymethyl cellulose, hydroxy propyl cellulose, sodium lignin sulfonate, potassium lignin sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt; the refractive index regulator is an iodine-containing compound and / or a fluorine-containing compound. According to the anti-scattering water-guided laser cutting fluid, light beam scattering and energy loss in the water-guided laser cutting process can be remarkably reduced, and the cutting precision and efficiency are improved. The anti-scattering water-guided laser cutting fluid has very good application prospects and large-scale industrial popularization potential in the field of water-guided laser cutting.

The utility model relates to the technical field of pillows, in particular to a down memory foam composite five-partition supporting cervical vertebra pillow which comprises three layers of pillow interiors, namely an upper-layer pillow interior, a middle-layer pillow interior and a lower-layer pillow interior. The upper-layer pillow inner is provided with a flat elastic bag body, and the bag body is filled with down feather to form an integrated down feather layer; the middle-layer pillow inner is filled with memory foam to form a memory foam layer; the lower-layer pillow inner is provided with another flat elastic bag body, and polyester fibers are filled in the bag body to form a fiber filling layer; a lower head nest area is arranged in the middle of the memory foam layer; the area on the front side of the head pillow area is called as a neck lower pillow area; the area on the rear side of the head pillow area is called as a head high pillow area; the two areas on the two sides of the head pillow area are called side-lying pillow areas; the head nest area is lowest in height and located in the middle, and the other four areas are arranged around the head nest area; under the condition that the comfort of the down feather layer is guaranteed, the supporting capacity of the pillow inner is enhanced.

The invention relates to the technical field of coating, and discloses a slit type coating die head with multiple layers of coating heads, the slit type coating die head comprises a plurality of coating heads, a plurality of shaping plates connected between the coating heads, a feeding pipe connected to one side of each coating head and material uniformizing grooves formed in the surfaces of the coating heads, and an air bag is fixedly connected in each material uniformizing groove; one end of the air bag is fixedly connected with an air inlet pipe, one side of the coating head is provided with a connecting hole, one end of the air inlet pipe penetrates through the connecting hole and is fixedly connected with an air guide pipe, one side of the coating head is fixedly connected with a fixing block, and the valves are communicated through the connecting pipe. One end of the connecting pipe is fixedly connected with a fan. According to the coating uniformizing device, the inner space of the uniformizing groove is filled through cooperation of the air bag and the fan, so that coating residues in the uniformizing groove are reduced, waste of the coating is avoided, the utilization efficiency of the coating is improved, and the production cost is reduced.

The invention belongs to the technical field of production of special materials for electrical equipment, and provides a carbon ceramic resistor and a preparation method and application thereof in view of problems existing in the prior art. Composite conductive particles are uniformly dispersed in a ceramic matrix of the carbon ceramic resistor; the composite conductive particles comprise conductive carbon and aluminum oxide and are provided with hierarchical pores; the conductive carbon is constructed in the hierarchical porous composite conductive particles, and the dispersion of the carbon material is adjusted into the dispersion and distribution of the composite conductive particles in the ceramic matrix, so that the carbon material is more uniformly distributed in the carbon ceramic resistor; the phenomenon that conductive filler is prone to agglomeration due to the fact that a conductive carbon material is directly mixed with a ceramic material in a traditional method is avoided, meanwhile, due to the existence of aluminum oxide, interface bonding of the composite conductive particles and the ceramic matrix is tighter, and the overall conductive performance, strength and stability of the carbon ceramic resistor can be improved.

The invention relates to the field of anode conversion film voltage withstanding performance testing, in particular to an anode conversion film voltage withstanding performance testing device and method. Comprising a temperature control box, a pressurizing mechanism and an optical microscope, a pressure measuring platform is further arranged in the temperature control box, the pressurizing mechanism comprises a pressing disc and a pressurizing driving assembly, and the pressurizing mechanism further comprises a rubber pressing sleeve fixedly arranged on the pressing disc in a sleeving mode and an expanding assembly capable of expanding the rubber pressing sleeve. And a pressure maintaining structure for avoiding insufficient contact between the rubber pressing sleeve and the sample is arranged in the rubber pressing sleeve. The rubber pressing sleeve is driven by the expansion assembly to deform, so that the rubber pressing sleeve is synchronously expanded in multiple directions to ensure that the whole sample is uniformly pressed, and meanwhile, the pressure maintaining structure is started, so that the condition that the rubber pressing sleeve and the sample are insufficiently contacted is avoided, and the pressure uniformity is further improved.

The invention discloses a hot drawing machine for antibacterial polymer fiber production and a drawing method, relates to the technical field of antibacterial polymer fiber production, and solves the problems that the temperature distribution of hot air entering an air duct becomes non-uniform, the fiber fineness becomes non-uniform, and the production efficiency is improved due to the fact that mixing is non-uniform after an existing hot drawing machine is heated. And the overall strength is reduced. Comprising a base and a treatment bin arranged at the upper end of the base, and inlet-outlet grooves are formed in the two sides of the treatment bin in a penetrating mode; the treatment mechanism comprises a preheating assembly and a heating mechanism; a preheating cavity, a hot drafting cavity and a cooling cavity are formed in the treatment bin; by means of the design, fibers can be evenly heated, and uneven temperature distribution of hot air entering the air duct is effectively avoided; and when the fibers are longitudinally clamped and fixed and transversely stretched, the fibers can be limited, so that the fibers can be effectively prevented from deviating in the stretching process, and the production quality of the antibacterial polymer fibers is improved.

The utility model discloses a device for producing wontons, and relates to the related technical field of wonton production equipment, a rack is fixedly connected with the outside, a transmission mechanism is arranged in the rack, the transmission mechanism is in transmission connection with a wrapper conveying belt, a dough pressing roller and a dough driving brush, a stuffing feeding and wrapper turning mechanism is arranged on the rack, and the stuffing feeding and wrapper turning mechanism is arranged on the rack. The stuffing feeding and wrapper turning mechanism comprises a stuffing feeding mechanism, a turning mechanism and a wrapping and wrapper pressing mechanism, the wrapping and wrapper pressing mechanism is arranged on the right side of the stuffing feeding and wrapper turning mechanism, the wrapping and wrapper pressing mechanism comprises a wrapping mechanism and a wrapper pressing mechanism, and the wrapper pressing mechanism is arranged above the wrapping mechanism; the wonton conveying belt is arranged on the right side of the wrapping and wrapper pressing mechanism, the whole process of the device adopts mechanical propulsion, through cooperation of the stuffing feeding and wrapper turning mechanism and the wrapping and wrapper pressing mechanism, wrapped wontons are standard in shape and attractive in appearance, and meanwhile the whole structure is simple, stable, reliable and convenient to operate; and the production efficiency and the product quality are improved.

The invention relates to a high-degradation layered nickel-cobalt-manganese positive electrode material single-crystallization upgrading reconstruction method, which comprises the following steps: S1, discharging a waste ternary lithium ion battery, disassembling and crushing to obtain positive electrode powder; s2, mixing the obtained positive electrode powder and the selected molten salt according to a determined proportion, grinding by using a ball mill to ensure that the molten salt and the recycled powder are uniformly mixed, then performing a lithium supplementing process under a high-temperature condition, and meanwhile, effectively removing impurities such as a residual binder and a conductive agent in the positive electrode powder; the lithium supplement heating condition is that the temperature is raised to 600 DEG C, heat preservation is performed for 2 hours, then heat preservation is performed for 4-6 hours at 910-930 DEG C, the temperature raising speed is 4 DEG C / min, and the gas atmosphere is air. And S3, the sample after lithium supplementation is completed is subjected to heat treatment in the oxygen atmosphere, impurity phase structures possibly existing on the surfaces of particles are repaired, the electrochemical performance of the regenerated material is close to the performance of a commercial battery, meanwhile, due to the unique single-crystal structure, the structural stability of the regenerated material is greatly improved. The method can be applied to recovery of various ternary lithium ion battery positive electrode materials by simply adjusting the heating temperature and the heat preservation time, and has very high application value.

The invention relates to the technical field of metal 3D printing, and discloses an adjustable powder laying structure and a 3D printing method in order to solve the technical problems that according to conventional 3D printing equipment, scraper replacement operation is complex, box opening operation is needed, consumed time is long, and a forming cabin needs to be inflated again. The outer side of the fixing support is connected with a pressing roller mechanism through a driving system, and a scraper system is arranged on the inner side of the fixing support. The fixing support comprises a top transverse plate and a lateral vertical plate, and a lifting groove is formed in the inner side of the lateral vertical plate and used for vertical displacement of the scraper system along the lifting groove. The scraper system comprises a pair of main rotating discs, a main shaft is fixedly connected to the centers of the inner sides of the main rotating discs, a plurality of scrapers arranged in a circumferential array are arranged between the main rotating discs, and first fixing pins used for axially positioning the scrapers are arranged on the main rotating discs. And due to the design of the main rotating disc and the scrapers arranged in the circumferential array, the scrapers can be rapidly replaced, and the technical problem that box opening and re-inflation are needed for replacing the scrapers is solved.

The invention relates to the technical field of carbon capture, in particular to an antioxidant for a carbon capture composite amine absorbent and a preparation method of the antioxidant, and the antioxidant comprises the following raw materials in parts by weight: 30-60 parts of a sulfur-containing organic compound, 20-40 parts of a metal complex and 10-30 parts of a high-molecular polymer; wherein the sulfur-containing organic compound has a sulfur-carbon bonded conjugated system; the metal complex is a complex formed by transition metal ions and an organic ligand containing nitrogen and oxygen coordination atoms; the high-molecular polymer comprises any one or more of a polyethylene glycol derivative, polyvinylpyrrolidone, polyacrylic acid and polymethyl methacrylate. The antioxidant provided by the invention has excellent oxidation resistance and good stability in the carbon capture composite amine absorbent, does not influence the absorption performance of the composite amine absorbent on carbon dioxide, and can effectively ensure the efficient and stable operation of the carbon capture process.

The utility model discloses a feed production hopper relates to the field of feed production, including the hopper shell that is wide to narrow from the upper, the hopper shell upper port installs the preliminary filtration subassembly, the hopper shell lower port installs the unloading anti -blocking subassembly, the preliminary filtration subassembly with the unloading anti -blocking subassembly between installation has reciprocating conveying subassembly, and the feed granule is filtered to the hopper shell in the preliminary filtration subassembly, and the feed granule is reciprocating pushed in the unloading anti -blocking subassembly to the feed granule of the hopper shell's unloading port place in this process, can effectively avoid the feed granule to be accumulated and be jammed at the unloading port of hopper shell, and can also reduce the mechanical damage to the feed granule by virtue of the non - rigid reciprocating pushing mode, compared with the traditional rotation stirring can keep the original integrality and granularity uniformity of feed granule, reduce the fine powder production amount and the secondary problem caused thereby.

A kind of vocal cord repair device based on advanced biological printing technology assisted, comprising: imaging positioning component, including endoscope imaging module and three-dimensional reconstruction processor;Surgical operating component, including glottis exposure mechanism and elephant trunk type flexible mechanical arm, glottis exposure mechanism exposes glottis to provide field of view, and mechanical arm high-precision operation;Biological repair component, including micro printing head, compatible hydrogel, injection tube and motion control mechanism, realize vocal cord reconstruction and function recovery.Integrate biological printing component and imaging positioning component, system can accurately obtain the three-dimensional structure data of vocal cord damage area, and realize the millimeter level accurate deposition of biological material, so that the millimeter level precision of imaging positioning, micron level operation of mechanical arm and controllable printing of biological material form closed loop feedback system, improve the overall success rate of vocal cord repair, realize the leap of vocal cord repair from "empirical operation" to "precision engineering", provide safer and more effective treatment options for patients with vocal cord dysfunction.

The invention relates to a preparation method of a multifunctional composite proton exchange membrane, and aims to design a special membrane for electrochemical equipment such as a fuel cell and a water electrolysis device so as to improve the proton conduction efficiency and chemical stability of the electrochemical equipment. In an experiment, the polyether sulfone proton exchange membrane is prepared through an optimized electrostatic spinning process, and nanofibers with a high specific surface area and a specific pore structure are formed, so that the proton exchange capacity and the mechanical stability of the membrane are enhanced. The invention also covers a preparation method of the membrane, in which sulfonated polyethersulfone is dissolved in a suitable solvent, a nanofiller and a suitable tackifier are added, electrostatic spinning is carried out by adjusting parameters such as voltage, flow rate and collection distance, and then heat treatment and chemical treatment steps are carried out to optimize the performance of the membrane. The preparation method is characterized in that the mechanical strength, the chemical stability and the proton conductivity of the membrane are remarkably improved by applying an electrostatic spinning technology and adding a modified material, and the membrane can keep excellent performance even under harsh operation conditions, so that the membrane becomes an ideal choice for high-efficiency electrochemical application. According to the invention, the performance and the stability of the electrochemical equipment are obviously improved, and important technical support is provided for promoting the development and the application of the electrochemical field.

The invention relates to the technical field of hydrogen storage materials, and particularly discloses a slurry-like hydrogen storage material and a preparation method thereof.The slurry-like hydrogen storage material is prepared by mixing metal hydride, a liquid organic hydrogen carrier and an additive, and the preparation method includes the steps that one of magnesium hydride (MgH2), sodium-aluminum hydride (NaAlH4) and calcium hydride (CaH2) is selected as the metal hydride, and the other one of magnesium hydride (MgH2), sodium-aluminum hydride (NaAlH4) and calcium hydride (CaH2) is selected as the additive; one of methyl cycloolefin (MCH) and tetrahydronaphthalene is selected as a liquid organic hydrogen carrier, and polyvinyl alcohol (PVA) or polyurethane (PU) is selected as an additive. According to the preparation method disclosed by the invention, by optimizing the compounding ratio of the metal hydride to the liquid organic hydrogen carrier, enhancing interface contact, improving the stability of the material and strictly controlling storage and operation conditions, the problems of hydrogen storage capacity, hydrogen storage efficiency, stability and the like of a traditional slurry hydrogen storage material are solved, and the hydrogen storage material has relatively good performance and relatively high hydrogen storage capacity.

The invention discloses a method for preparing high-purity synthetic quartz sand from white carbon black. The method comprises the following steps: S1, soaking white carbon black in a mixed acid solution of hydrofluoric acid and hydrochloric acid, taking out a solid, cleaning and drying to obtain high-purity SiO2 powder; s2, treating the high-purity SiO2 powder at a high temperature, and removing residual moisture and hydroxyl groups in the SiO2 powder; s3, crushing a product treated in the step S2 into powder, and pressing the powder into blocks; s4, carrying out densification heat treatment on the block obtained in the step S3 through a two-step calcination method, firstly heating to a lower temperature t1, carrying out heat preservation for a shorter time, then heating to a higher temperature t2, carrying out heat preservation for a longer time, and cooling to obtain a high-density quartz block; t1 is selected from 1100-1200 DEG C, and the heat preservation time of t1 is 1-2 h; t2 is selected from 1300-1500 DEG C, and the heat preservation time in t2 is 2-10 h; and S5, crushing the high-density quartz blocks to obtain high-density high-purity quartz sand.

The invention relates to the technical field of mineral flotation, and discloses a method for compounding a lithium oxide collecting agent in a low-temperature environment, and the lithium collecting agent comprises the following compounding raw materials in percentage by mass: 15-25% of palmitic acid soap; 10%-20% of sulfonated petroleum; 5% to 10% of iso-tridecanol polyoxyethylene ether; 8%-15% of fatty alcohol-polyoxyethylene ether; 3%-8% of polyoxyethylene ether sodium sulfonate; 5%-10% of dipropylene glycol monomethyl ether; 8%-15% of sodium carbonate; 2%-5% of sodium hydroxide; 0.5%-2.0% of sodium fluoride; 0.5%-2.0% of aluminum sulfate; 1%-4% of tannic acid; a synergistic surfactant system is formed by constructing palmitic soap and sulfonated petroleum as a main collecting frame and compounding isomeric alcohol ether, fatty alcohol-polyoxyethylene ether and polyoxyethylene ether sodium sulfonate, dipropylene glycol monomethyl ether is introduced as a low-temperature mutual solvent, and the low-temperature mutual solvent is used for collecting the high-temperature-resistant oil-displacing agent for the oil-displacing oil-displacing agent for the oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil. The freezing point and viscosity of a collecting agent system are greatly reduced, the liquidity, uniformity and dispersion stability of the collecting agent are still kept when the collecting agent is used in the low-temperature environment of 0-15 DEG C, and the failure problem caused by low-temperature solidification or layering is fundamentally avoided.

The utility model relates to an ink coating mechanism for edge covering of a silicon wafer battery piece, which comprises a bottom plate, supports are arranged on the bottom plate at intervals, a rotating shaft is arranged between the supports on the two sides in a rotating mode, and an ink roller is sleeved on the rotating shaft. A vertical plate with an inverted L-shaped structure is mounted on each single-side support, and a micrometer is mounted on each vertical plate; tool aprons are further arranged between the micrometer and the rotating shaft, a scraper is jointly installed on the tool aprons on the two sides, and the scraper is located above the printing ink roller at intervals; the tool aprons on the single sides are installed on the vertical plate in a floating mode. By rotating the micrometer, adjusting the actual relative position of the tool apron relative to the vertical plate and adjusting the spacing distance of the scraper on the tool apron relative to the printing ink roller, the thickness of an ink layer on the printing ink roller is adjusted through the scraper so as to meet the edge covering requirements of different printing ink thicknesses on a silicon wafer battery piece, operation is convenient and rapid, and the working efficiency is improved. And the printing ink thickness precision and uniformity can be effectively adjusted and maintained, and the practicability is good.

The utility model discloses spraying equipment for a rust-proof layer on the surface of a renovated steel drum, and relates to the technical field of spraying equipment, the spraying equipment comprises a support, sliding assemblies are fixedly connected to the two sides of the top end of the support, telescopic assemblies are fixedly connected to the two sides of the support, a driving assembly is slidably connected to one side of the support, and the telescopic assemblies are fixedly connected to the other side of the support. And the exterior of the sliding assembly is slidably connected with a conveying assembly, the top end, away from the driving assembly, of the support is fixedly connected with a spraying assembly, and a steel drum body is arranged at the top end of the conveying assembly. According to the utility model, the capability of equipment for adapting to steel drums with different sizes is enhanced, the equipment can adapt to the steel drums with different shapes and sizes, the uniformity and efficiency of the spraying process are kept, the labor cost and the operation difficulty are reduced, and the spraying work of the rust-proof layer on the surface of the renovated steel drum becomes more efficient, simpler, more convenient and more reliable.

The invention discloses a grain size control method of a reclaimed material hard alloy, which comprises the following steps: S1, component analysis of the reclaimed material: the proportion of oversize products is 0-8% when the reclaimed material passes through a 110-120-mesh sieve; s2, burdening according to the use ratio of the reclaimed material being 50%-99% and the ball-to-material ratio being (2-5): 1, carrying out a ball milling test, preparing a sample, and detecting the coercive force; s3, the raw material ratio and the ball-to-material ratio are equal to those in the step S2, and a mixture is obtained through batching and ball milling; s4, the mixture is subjected to compression molding, and a pressed blank is obtained; and S5, the pressed blank is subjected to pressure sintering, and the reworked material hard alloy with the grain size being 2.0-3.0 microns is obtained. The method is simple and easy to implement, the grain size of the regenerated material can be accurately judged, the integrity and uniformity of alloy grains can be ensured, the prepared regenerated hard alloy has good physical performance, the performance very close to that of a raw material alloy can be achieved, and the application field of the regenerated hard alloy is widened.

This invention relates to the field of lighting technology, and in particular to a white light supercontinuum fiber combiner, a light-emitting unit, and a method for fabricating the same, including N 2 One first input optical fiber, (N-1) 2 The first input fibers consist of a second input fiber and a square output fiber. Multiple first input fibers are arranged in a square array. One or more second input fibers are respectively disposed in the gaps formed between the multiple first input fibers. The square output fiber is fused to the tapered fused ends of the first and second input fibers. N is a natural number greater than or equal to 2. This invention's white light supercontinuum fiber combiner can transmit spectral energy with high quality, offering superior color reproduction compared to traditional white light illumination. It also meets the application requirements for high illumination brightness, effectively solving the problem of insufficient brightness in existing lighting devices.

The utility model is suitable for the technical field of zinc liquid storage, and provides a zinc liquid circulating device which comprises a base plate, and a storage tank used for containing zinc liquid is arranged at the top of the base plate; the mounting frame is fixedly mounted at the top of the base plate; the filter box is used for circularly treating the zinc liquid, the filter box is arranged on the mounting frame, a plurality of net baskets capable of being pulled and detached are arranged in the filter box, and a coarse filter plate, a fine filter plate and an activated carbon plate which are used for filtering impurities in the zinc liquid are respectively arranged in the corresponding net baskets. According to the zinc liquid circulating device provided by the scheme, through effective filtering and circulating treatment, the purity of the zinc liquid is improved, the quality of subsequent processing products is guaranteed, and the problem that the quality of the subsequent processing products is affected due to the fact that physical and chemical properties of the zinc liquid are changed due to mixing of impurities in the zinc liquid storage process at present is solved.

The application provides a visual-language model prompting method and system based on a coupling prompt field, and belongs to the fields of artificial intelligence and computer vision. The method comprises the following steps: mapping a base class task and a new class task to a shared feature space, defining a coupling prompt field, and enabling the base class and the new class task to form mutual constraints in the shared feature space; performing scale constraints on the coupling prompt field through projection layer norm alignment and coding layer layer-by-layer norm alignment; integrating the projection layer norm alignment loss and the coding layer layer-by-layer norm alignment loss, fusing the alignment loss and a task loss of a visual-language model, forming a model overall training target, and performing training; performing reasoning on the base class task and the new class task based on the trained model, and outputting a classification prediction result. The application solves the problems of existing end-to-end, decoupling prompt learning, base class-new class isolated optimization, easy falling into local optimum, norm drift and entanglement collapse, and improves the cross-task generalization and robustness of the model.

The lamp comprises a lampshade and a lamp shell which are connected in a sealed mode, one side of the lamp shell is provided with an installation hole and provided with a light guide plate in an inserted mode, the light guide plate comprises a black piece and a white piece which are connected into an integrated structure, and the white piece is engraved with patterns and inserted into the lamp shell. The black sheet covers the opening of the mounting hole and is assembled and connected with the lamp shell; a light-emitting module is further arranged in the lamp shell and used for emitting light to lighten the white piece and present patterns on the white piece. According to the utility model, the light guide plate is split into a plurality of parts, one of the parts is engraved with the pattern, and the other parts are assembled with the lamp housing, so that the light guide plate can be independently disassembled relative to the lamp housing, and a user can independently disassemble and replace the light guide plate without disassembling the lampshade and the lamp housing; the influence of disassembly and assembly of the light guide plate on the lighting effect of the lamp is avoided, and meanwhile, a single part is convenient to replace and low in cost.

The invention discloses a double-shell structure conversion type positive electrode material, a preparation method thereof and an electrochemical device, the double-shell structure conversion type positive electrode material comprises a base material, an inner shell layer and an outer shell layer, the inner shell layer and the outer shell layer sequentially coat the surface of the base material, the base material is the conversion type positive electrode material, the inner shell layer is liquid metal, and the outer shell layer is metal oxide. The double-shell structure conversion type positive electrode material provided by the invention has a double-shell structure, and the inner shell layer and the outer shell layer act synergistically to doubly fix and buffer the matrix material, so that the volume expansion of the matrix material and the loss of the positive electrode active material are reduced, and the interface stability of the double-shell structure conversion type positive electrode material is improved; the conversion type positive electrode material with the double-shell structure shows ideal capacity density, rate capability, cycle stability and cycle life, and can be suitable for wide-temperature-range and high-rate cycle conditions.

The application provides a method for detecting biochemical oxygen demand in sewage, and belongs to the field of oxygen demand detection. The method comprises the following steps: forming a fluorine-containing organosilicon nano coating on the electrode surface of a dissolved oxygen sensor of a full-automatic BOD5 analyzer to obtain a fluorine-silicon modified dissolved oxygen sensor; pretreating the sewage to be detected in an adsorption column composed of modified activated carbon and porous silica gel to obtain a pretreated water sample; fixing bacillus subtilis on a porous carrier and then putting the carrier into the pretreated water sample to obtain an inoculated water sample; measuring the initial dissolved oxygen of the inoculated water sample and the end-point dissolved oxygen after 5-day culture; and obtaining the five-day biochemical oxygen demand in the sewage according to the initial dissolved oxygen and the end-point dissolved oxygen. Through the four-level collaborative system of "sensor anti-interference optimization, sample purification and enrichment, microbial reaction standardization and accurate signal acquisition", the application systematically eliminates the error sources in the traditional BOD5 detection, and realizes the accurate measurement of the organic matter pollution level in complex sewage.

This invention discloses a method for preparing van der Waals metal thin films. The method includes the following steps: S1, coating a polyvinyl alcohol (PVA) film onto the surface of a supporting substrate; S2, depositing a metal film on the surface of the PVA film to obtain an intermediate; S3, placing the intermediate in water at 60-80°C to remove the PVA film, obtaining a floating metal film; transferring the metal film to the surface of a target substrate, and bonding the two together using van der Waals forces to obtain the final product. This invention utilizes the controllable dissolution properties of PVA, achieving the separation and transfer of the metal film from the supporting substrate using deionized water, avoiding the use of toxic chemical solvents and interface damage caused by high-energy bombardment. The method is simple, environmentally friendly, and can be widely applied to the preparation of van der Waals heterostructures such as metal-semiconductor and metal-insulator structures.

The invention relates to a permanent magnet motor magnetic steel assembly process and equipment, and the equipment comprises an equipment box body, an L-shaped plate body is fixed on one side of the top of the equipment box body, an electric telescoping cylinder is installed on one side of the bottom of the L-shaped plate body, a fixed disc is installed at the bottom of the electric telescoping cylinder, a groove is formed in the bottom of the electric telescoping cylinder, and a first motor is installed in the groove. The bottom of the first motor is connected with a first motor shaft, the bottom of the first motor shaft penetrates through the fixing disc to be fixedly provided with a wind wheel, and a transmission assembly is arranged outside the first motor shaft. Multiple pieces of magnetic steel can directly stretch into a glue solution in the equipment box body, so that different positions of the surfaces of the multiple pieces of magnetic steel are directly glued in all directions; in the gluing process, the multiple pieces of magnetic steel can be driven to rotate through the transmission assembly at the same time, the multiple pieces of magnetic steel rotate to stir surrounding glue, the glue is homogenized, meanwhile, the surfaces of the magnetic steel are made to make uniform contact with the glue, and the uniformity of the glue on the surfaces of the magnetic steel is improved.