151 results about "Particle packing" patented technology

The invention provides an AI algorithm for automatically generating a solid-state battery material formula and application, and relates to a solid-state battery material formula generation method, device and equipment, a medium and a product, and relates to the technical field of battery materials. The method comprises the following steps: generating a plurality of initial parameter groups based on a candidate particle size set and a candidate particle number set; obtaining a particle accumulation constraint condition; inputting the plurality of initial parameter groups and the particle accumulation constraint conditions into a constraint layer to obtain a plurality of constrained parameter groups conforming to the particle accumulation constraint conditions; inputting the constrained parameter groups into a battery performance parameter prediction model to obtain battery performance parameters corresponding to the constrained parameter groups; and based on the battery performance parameters corresponding to each constrained parameter group, determining a target parameter group in each constrained parameter group, and generating a solid-state battery positive electrode formula based on the target parameter group. The embodiment of the invention can optimize the positive electrode material system and improve the overall performance of the battery.

The invention provides a method and a system for wirelessly monitoring blockage of a filter screen of a dust remover. The method comprises the following steps: irradiating the surface of a filter screen by multi-wavelength laser to collect optical scattering data of particle accumulation, and extracting scattering angle distribution and intensity change characteristics under different wavelengths; collaborative analysis is carried out on a structured sequential sequence of particle accumulation distribution formed by multi-source scattering, a dynamic correlation mode is captured through scattering mode correlation processing, and an abnormal spectrogram fused with multi-wavelength collaboration is constructed; and mapping the data to a filter screen three-dimensional space coordinate to generate particle stacking density three-dimensional distribution data, generating a blockage position and severity level monitoring result according to a density over-threshold value, and pushing the blockage position and severity level monitoring result to a mobile terminal for display. According to the invention, three-dimensional space positioning and real-time grading alarm of the blockage degree of the filter screen are realized, and the maintenance accuracy of the purifier and the user response timeliness are improved.

The invention discloses a ceramic nanofiber membrane and preparation thereof, a catalytic ceramic nanofiber membrane and preparation and application thereof. The preparation method of the ceramic nanofiber membrane comprises the following steps: (1) cleaning a particle accumulation state ceramic membrane support body; (2) spraying the mullite fiber membrane layer slurry on one surface of a supporting body for multiple times by using a spraying method, after each spraying, applying negative pressure to a membrane for a preset time, then drying, and after the last drying, forming a spraying layer on one surface of the supporting body; and (3) sintering the obtained membrane at high temperature to obtain the ceramic nanofiber membrane which is provided with a support body and a mullite fiber membrane layer which is stably attached to one surface of the support body and is of a net-shaped structure formed by staggering and stacking mullite fibers. The catalytic ceramic nanofiber membrane comprises a ceramic nanofiber membrane and a catalyst loaded on the surface of the ceramic nanofiber membrane and in membrane holes. The ceramic nanofiber membrane provided by the invention has the advantages of high porosity, high mechanical strength, high membrane flux and the like, and is beneficial to subsequent catalyst loading and application in water treatment.

The utility model discloses a device for classifying waste metal after fine crushing treatment, which comprises a base, a mounting frame and a conveying belt, and further comprises a material uniformizing mechanism and a magnetic separation mechanism which are positioned above the conveying belt, and a vibration material distributing mechanism fixed on the base, and the vibration material distributing mechanism comprises a plurality of material distributing grooves; the conveying belt is fixedly connected to the base through the conveying belt fixing frame, and the vibration distributing mechanism is located below a discharging port of the conveying belt. According to the whole structure of the device, efficient and automatic metal sorting is achieved through multiple screening, grading and stable design, and the sorting precision, stability and working efficiency of equipment are greatly improved; the problems that in the prior art, non-magnetic metal and metal particles with small density difference cannot be effectively separated through a single screening mode, and the screening precision is affected by metal particle accumulation are solved.

Provided in the present application are a sodium-ion battery positive electrode precursor having a core-shell structure, a manufacturing method therefor, and the use thereof. Said precursor comprises a core and a shell on the surface of the core, the core comprising NiaFebMn1-a-b-cMc(OH)2, wherein 0.3≤a≤0.5, 0.2≤b≤0.4 and 0≤c≤0.01, and the shell comprising NixCuyFezMn1-x-y-z-vNv(OH)2, wherein 0.1≤x<0.3, 0.02≤y≤0.2, 0.2≤z≤0.4 and 0≤v≤0.01, and the shell containing pores. In said precursor of the present application, primary particles of the core are of a dense packing while primary particles of the shell are of a loose packing, so that compaction density, energy density, porosity and specific surface area of the material are improved, thus improving properties of the material.

The invention belongs to the technical field of lithium batteries, and relates to a material particle size grading optimization method and system based on a genetic algorithm and discrete element simulation. The method comprises the following steps: carrying out particle size distribution test on a material to be optimized to obtain a particle size distribution result as an optimizable particle size range; carrying out three-component peak separation on the obtained particle size distribution result, and approximately representing the particle size distribution of the material through three-component spherical particles; optimizing the stacking density of the three-component spherical particles in an optimizable particle size range by utilizing a genetic algorithm, and enabling the optimized stacking density of the three-component spherical particles to be approximate to the compaction density of the three-component spherical particles; obtaining physical property data of the material; and carrying out simulation verification on the compaction density of the three-component spherical particles obtained by optimization by using a discrete element model according to physical property data of a material. According to the method, optimization design is carried out on the particle size of the material based on discrete element analog simulation and a genetic optimization algorithm, and the large and small particle gradation of the high-compaction-density material can be rapidly screened.

The invention discloses a synthesis method of a high-power anti-water-absorption phosphate positive electrode material, which comprises the following steps of: performing micro-nanocrystallization on a precursor, uniformly dispersing by sanding on the basis, fully refining the precursor, a carbon source and a lithium source in a liquid phase system by sanding, and realizing highly uniform contact, thereby obtaining the high-power anti-water-absorption phosphate positive electrode material. The carbon source can uniformly coat the surfaces of the particles and be embedded on the interfaces, so that the particles are in contact with channels and form a continuous conductive phase after heat treatment, and the uniformly compounded primary particles are compactly packaged into a spherical secondary structure through spray drying and secondary granulation, so that the exposed specific surface area is reduced, and an internal conductive contact network is locked; therefore, pulping viscosity fluctuation and gelation risks caused by moisture adsorption and abnormal solvent adsorption are inhibited, an internal conductive network and particle accumulation morphology are locked, and finally, synergistic improvement of conductivity, water absorption resistance and processing consistency is realized.

The invention relates to an outdoor particle furnace and belongs to the field of outdoor devices. The outdoor particle furnace comprises a furnace body, a rotating plate and a rotating mechanism. The rotating plate is arranged in the furnace body so as to divide the furnace body into a combustion cavity and a containing cavity which are arranged in the gravity direction, and a protrusion is arranged on the side, facing the combustion cavity, of the rotating plate; the rotating mechanism is at least partially arranged in the containing cavity, and the rotating mechanism is used for driving the rotating plate to rotate so as to drive the protrusions to stir the granular comburent; the rotating mechanism drives the rotating plate to rotate so as to drive the protrusions, located in the combustion cavity, of the rotating plate to rotate, so that particles are stirred to be looser, the particles can be more evenly distributed, later-added particles are prevented from being accumulated at the same position, the particles can be evenly combusted, and the contact area of the particles and air is increased; therefore, sufficient combustion of the particles is facilitated.

The invention discloses a method and a system for forming an elliptical particle accumulation body, which are applied to the technical field of geotechnical engineering and material science, and the method comprises the following steps: defining a space boundary and a calculation rule; generating bottom-layer elliptical particles according to a placement sequence from left to right, and placing the bottom-layer elliptical particles: determining an arc section in contact with a boundary line of the container, and determining the center of the first bottom-layer elliptical particle based on translation and offset calculation of a left boundary and a lower boundary; bottom-layer elliptical particles are randomly generated, the bottom-layer elliptical particles and the previous elliptical particles form an invasion block, and based on line segment information after the lower boundary and the right boundary of the container are shifted, putting judgment of the bottom-layer elliptical particles is carried out; and generating and placing upper-layer elliptical particles: randomly generating the upper-layer elliptical particles, traversing a current accumulation body surface layer elliptical particle set to form a corresponding invasion block body, and carrying out putting judgment on the upper-layer elliptical particles based on line segment information after the left boundary, the right boundary and the upper boundary of the container are shifted. According to the invention, the generation of the elliptical particle accumulation body with high density and low porosity is realized.

The invention belongs to the technical field of 3D printing concrete materials, and particularly relates to 3D printing waste glass recycled lightweight aggregate concrete and a preparation method thereof. The concrete is prepared from the following raw materials: cement, silica fume, fine aggregate, waste glass recycled lightweight aggregate, a viscosity modifier, nano silicon dioxide, nano cellulose fibers, a water reducing agent, fly ash, a defoaming agent and water. The lightweight 3D printing concrete with different densities is prepared by replacing sand with the lightweight aggregate prepared by recycling the waste glass, the tackifier, the thixotropic agent, the nano-crystalline cellulose fiber, the water reducer and the fly ash are used for competitive synergistic effect to improve the water-retaining property and the rheological property, a nano-micron multi-scale synergistic system is constructed, multi-stage particle accumulation is effectively realized, and the 3D printing concrete with different densities is prepared. The problems that the constructability is difficult to improve while the density of conventional 3D printing lightweight aggregate concrete is reduced and the lightweight aggregate of low-density 3D printing concrete floats upwards are solved, the printable window time is prolonged, and the interface performance of an aggregate matrix is enhanced.

The invention relates to an intelligent impact tendency evaluation method based on multitask gating mechanism coal, which belongs to the technical field of crossing of electric digital data processing and geological engineering, and comprises the following steps of: 1, collecting related data, and constructing a data set; 2, training a coal body impact tendency intelligent evaluation model based on multi-task learning by using the constructed data set, so that the model learns nonlinear mapping of a coal body microstructure and macroscopic mechanical properties; and 3, inputting particle accumulation and joint structure information of to-be-detected coal into the model trained in the step 2, carrying out regression analysis to obtain a coal impact tendency index, and judging the coal impact tendency according to a standard. According to the method, a low-cost and high-reliability intelligent solution is provided for mine dynamic disaster prevention and control, and the method has technical innovation and engineering application value.

The present invention discloses a flexible thermoelectric composite film, a preparation method and its application. The preparation method comprises: (1) mixing tellurium antimony bismuth powder with a polymer solution to obtain a mixture, and ball milling the mixture under a protective atmosphere to obtain a thermoelectric composite slurry; (2) using polyimide as a substrate, tape-casting the thermoelectric composite slurry onto the substrate, and obtaining the flexible thermoelectric composite film after drying and discharge plasma annealing. In the present invention, the composite film after SPA treatment is transformed from a loose particle stacking structure to a composite structure with interconnected polymers, forming a large-area interconnected network structure, and the thermoelectric particles are embedded in the PVDF matrix. Such a structure is conducive to the conduction of electrons, thereby facilitating the improvement of electrical conductivity. The method adopted by the present invention greatly shortens the preparation process time, and the prepared organic / inorganic composite material has a high power factor.

The sorting device for modified plastic production comprises a main machine body, fixing plates are fixedly installed on the two sides of the inner wall of the main machine body, a movable frame is installed between the two sets of fixing plates, two sets of connecting plates are symmetrically and fixedly installed on the two sides of the movable frame, and the four sets of connecting plates are in sliding connection with the two sets of fixing plates respectively. And telescopic rods are fixedly installed at the four corners of the top side of the movable frame, and the top ends of the four sets of telescopic rods are jointly and fixedly connected with a sieve plate. The connecting rods can be driven to move flexibly through the cooperation of the driving motor and the rotating disc, the movable frame can be driven to move flexibly through the cooperation of the connecting rods and the connecting pins, and the sieve plate can move in the horizontal direction and the vertical direction at the same time through the cooperation of the telescopic rods, the sliding rods and the guide grooves. And low sorting efficiency caused by accumulation of the plastic particles at one position is avoided, and the production efficiency of products is improved.

The invention belongs to the technical field of electroacoustics, and particularly relates to a sound production device and electronic equipment, the sound production device comprises a shell, a sound production monomer and a breathable separator, the sound production monomer and the breathable separator are arranged in the shell, the sound production monomer is matched with the shell to define a front sound cavity and a rear sound cavity in the shell, and the rear sound cavity is filled with a sound absorbing material; the breathable separator is used for isolating the sound-absorbing material and the sound-producing monomer, the sound-absorbing material comprises first molecular sieve powder particles with the average particle size of 10-50 microns and sound-absorbing particles with the average particle size of 150-1000 microns, and the sound-absorbing particles are sphere-like particles formed by bonding a plurality of second molecular sieve powder particles; and the air-permeable aperture of the air-permeable separator is smaller than the minimum particle size of the first molecular sieve powder particles. According to the invention, the first molecular sieve powder particles can be filled in the narrow space of the rear sound cavity and the gaps where the sound-absorbing particles are stacked, so that the filling amount of the sound-absorbing material in the rear sound cavity is increased, the resonant frequency of the sound production device is effectively reduced, and the low-frequency acoustic performance of the sound production device is improved.

This invention discloses a centrifugal pump impeller structure for preventing clogging of chemical media containing solid particles, relating to the technical field of centrifugal pump impeller structures. It includes a centrifugal pump body with a pump chamber and an inlet and outlet chamber communicating with it. Adjustment chambers communicating with the outlet chamber are provided on both outer walls of the centrifugal pump body. A rotating shaft is rotatably mounted on the centrifugal pump body along the axis of the adjustment chamber. A double-suction impeller located within the pump chamber is detachably mounted on the rotating shaft. The double-suction impeller has multiple spirally arranged blades, with inlet channels for media passage formed between adjacent blades. By providing cylindrical protrusions on both sides of the double-suction impeller, and using a first air nozzle corresponding to the inlet channel and a second air nozzle corresponding to the outlet channel, along with a purging component to deliver high-pressure gas, active purging of the inlet and outlet channels is achieved. This allows for real-time cleaning of solid particle deposits on the blade surface, inlet and outlet channels, and in the gaps, preventing impeller clogging.

The utility model discloses a kind of noble metal drying devices, it is related to noble metal processing technical field, including support column, drying cabinet, door, vibration mechanism being set on drying cabinet, first sieve basket, second sieve basket, third sieve basket, fixing frame, fixed mechanism being set on fixing frame, rotating mechanism being set on drying cabinet, knock key, support plate, heating mechanism being set on support plate;Through the cooperation between vibration mechanism, first sieve basket, second sieve basket, third sieve basket, rotating mechanism, knock key and heating mechanism, rotating mechanism drives knock key to impact vibration mechanism constantly, so that vibration mechanism drives first sieve basket, second sieve basket and third sieve basket vibrate constantly, to realize the step-by-step screening of different particle size noble metal particles, avoid particle accumulation, simultaneously promote noble metal particles even heat by continuous vibration, significantly improve drying efficiency and effect.

Concrete composition system with nanosilica, RGO and industrial waste, comprising: an ordinary Portland cement (OPC) that serves as the primary binder in the mixture, with part of the OPC partially replaced by a combination of industrial waste and nanomaterials, including: Copper waste, which is contained in a proportion of 5 to 60 wt% of the cement content and serves as additional cement material from mining waste; Nanosilica, which is present in a proportion of 2 to 6 wt% of the cement and has a high pozzolanic reactivity to improve hydration and microstructural compaction; and reduced graphene oxide (rGO), which is present in trace amounts of 0.03 to 0.08% by weight of the cement and serves as a nano-reinforcing agent to improve crack resistance and tensile behavior; Granite powder, added as a filler in a proportion of 5 to 30 percent by weight of the total mixture, contributing to improved particle packing and reduced porosity; Fine and coarse aggregates in standardized proportions that form the granular structure of the concrete; Water added in a controlled water-binder ratio suitable to initiate cement hydration and maintain the workability of the fresh mix; a superplasticizer additive included in appropriate dosage to reduce water requirements and maintain fluidity without compromising mechanical performance.

This invention relates to a closed-loop control method and system for improving the compaction density of LFP electrodes. The method involves real-time acquisition of images of the micro-particle packing of the coating slurry, synchronized with the rolling mill operation data; extraction of micro-pore distribution features from the images, establishing a mapping relationship between these features and the material's fractional-order constitutive parameters; combining real-time rolling pressure and roll gap data, obtaining the equivalent fractional-order derivative order and rheological viscosity of the electrode material through rapid inversion calculation; inputting the viscoelastic properties into a physically constrained recurrent neural network to predict the full-cycle thickness evolution curve of the electrode, including elastic rebound, creep, and relaxation processes, and calculating the predicted compaction density based on the steady-state value of the curve; constructing a planning model with the goal of minimizing the residual between the predicted density and the set target, and jointly optimizing the roll gap position compensation and hot roller heating power online to achieve closed-loop control of the compaction density.

The utility model relates to the technical field of plastic particle packing, in particular to a damp-proof plastic particle packing device for regeneration. According to the technical scheme, the device comprises a base, a containing barrel and a sealing plate, a fixing frame is fixedly installed on the upper surface of the containing barrel, a first hydraulic cylinder and a vacuum pump are fixedly installed on the upper surface of the fixing frame, the sealing plate is fixedly connected to the output end of the first hydraulic cylinder, and air cylinders are symmetrically and fixedly installed at the positions, close to the two sides of the upper surface, of the outer surface of the containing barrel; the output ends of the two air cylinders are fixedly connected with hollow plates, adsorption holes are formed in the inner sides of the two hollow plates, and ultrasonic sealing plates are fixedly installed at the positions, below the adsorption holes, of the inner sides of the two hollow plates. The reprocessed plastic particle vacuum packaging device facilitates vacuum packaging of reprocessed plastic particles, so that the sealing performance is improved, the reprocessed plastic particles are prevented from being contaminated by moisture due to damp, and the quality and later use of the reprocessed plastic particles are guaranteed.

The application provides an experimental device and method for formation dissolution in carbon dioxide geological storage. The device comprises: a visualized autoclave system, including an autoclave with a first visualized transparent window; a double-continuous-phase particle accumulation experimental model placed in the autoclave opposite to the first visualized transparent window, which comprises: a Hele-Shaw glass model, a double-continuous-phase suspension accommodated in the Hele-Shaw glass model, which is prepared by mixing a saturated solution of an alkaline calcium compound with a set amount of water-insoluble calcium salt, and inert particles uniformly accumulated in the double-continuous-phase suspension; a carbon dioxide injection system for injecting carbon dioxide gas into the autoclave in a set manner; and an information acquisition and regulation system for acquiring environmental parameters in the autoclave and image information of the double-continuous-phase particle accumulation experimental model during the formation dissolution experiment. The carbon dioxide storage in a saline aquifer and the formation dissolution process can be simulated and visually monitored under experimental conditions.

The utility model relates to an ore pulp production system which comprises a raw material bin, a crushing unit and a grinding unit are arranged on the downstream of the raw material bin in parallel, and a sorting unit is arranged on the downstream of the crushing unit; the crushing unit is used for crushing part of ore in the raw material bin, and the sorting unit is used for sorting crushed powder; and the grinding unit is used for grinding the sorted super-large particles and the ores in the raw material bin, converging the ground superfine slurry and the sorted medium and large particles and introducing the mixture into the kneading machine. According to the slurry prepared by the ore pulp production system, the particle size distribution of non-metal ore pulp can be changed, the flowability and pulping concentration of the ore pulp can be improved, the proportion of large particles and superfine particles in the ore pulp can be increased, and meanwhile, the particle stacking density can be improved.

The utility model belongs to the technical field of spraying and dust falling, and particularly relates to a movable spraying device which comprises a spraying machine and a spray head, the spray head is arranged on the front side of the spraying machine, a dustproof mechanism is arranged on the front side of the spraying machine, and an output mechanism is arranged on the top of the spraying machine. The dustproof mechanism comprises a ring, a fluted disc, a round hole, a track groove, a sliding column, a notch and a baffle, the ring is fixedly connected to the front side of the spraying machine, the spraying head is arranged in the ring, the fluted disc is rotationally connected to the front side of the ring, the round hole is formed in the front side of the fluted disc, and the track groove is formed in the front side of the fluted disc and penetrates through the fluted disc; the sliding columns are slidably connected to the interiors of the track grooves correspondingly, and the groove openings are formed in the two sides of the circle. The utility model provides a movable spraying device which can reduce the probability that a spraying head is blocked by dust particles accumulated in air and prolong the service life of equipment under the protection of the spraying head.

This invention relates to a three-dimensional coupled heat transfer calculation method and system for granular phase change heat accumulators, encompassing the field of phase change heat accumulators. The method includes: constructing a one-dimensional heat transfer model of the interior of each phase change particle in the heat accumulator; obtaining the simulated particle packing morphology using the discrete element method (DEM); analyzing this result to extract the particle ID, 3D coordinates of the sphere's center, and radius parameters; generating particle geometric entities based on the 3D coordinates and radius parameters of each particle's center, and simultaneously generating the tank geometric entity of the heat accumulator, thus obtaining a three-dimensional flow field calculation domain model of the fluid domain; naming each spherical orifice in the three-dimensional flow field calculation domain model according to the particle ID and importing it into CFD software for mesh generation; solving the one-dimensional heat transfer model and the solver independently for each particle, with the solver solving the meshed three-dimensional flow field calculation domain model and the one-dimensional heat transfer model solving the phase change heat transfer process inside the particle, achieving coupling through data exchange on the particle's outer wall surface. This invention significantly improves computational efficiency while effectively ensuring computational accuracy.

The application belongs to the technical field of mineral castings, and discloses a mineral casting batching equipment, which comprises a supporting seat, a batching equipment is linearly and equidistantly fixedly connected to the top of the supporting seat, a screening plate is fixedly connected to the inside of the batching equipment, fixed blocks are fixedly connected to the four corners of the screening plate, a protective pad is fixedly connected to one side of the fixed blocks, and a sliding rod is movably connected to the middle of the protective pad. The batching equipment is not prone to batching particle accumulation in the screening process of the screening plate, and the flowability of the screening plate is improved through the cooperation of the sliding rod, the scraping plate, the first push rod, the baffle and other structures. The first push rod is pushed and moved along the limiting sliding groove, the sliding ring moves the fixed plate through the first push rod, the fixed plate moves the scraping plate, the surface of the screening plate can clean the batching particle accumulation, the screening plate is not prone to blockage, the flowability of the screening plate is improved, and the normal use of the batching equipment can be ensured.

This application discloses a method for preparing high-strength and high-toughness ZTA ceramics from multi-graded powder, relating to the field of structural ceramic preparation technology. The method includes: preparing raw materials by mixing four-particle-graded ZTA-based powder, yttrium oxide-cerium dioxide composite sintering aid, DMAA gel system, dispersant, initiator, and deionized water in parts by mass; followed by powder pretreatment, gel slurry preparation, casting and curing, degreasing treatment, and three-stage pressureless sintering to obtain the finished ZTA ceramic product. This application achieves close particle packing through a four-particle-graded structure based on the Dingle model, achieves uniform molding using a low-toxicity DMAA gel system, and controls grain growth through a three-stage sintering process, ultimately obtaining high-strength and high-toughness ZTA ceramics suitable for waste incineration power generation, biomedicine, semiconductor packaging, and other fields.

This invention proposes a three-dimensional electrode electrochemical device with descaling function. It is divided into a softening chamber and an oxidation chamber by a partition. The softening chamber contains multiple cylindrical electrode groups. Under the action of an external electric field, the cathode reaction generates a strongly alkaline environment to precipitate scale-forming ions in the water. A gas flushing mechanism and an external programmable DC regulated power supply effectively achieve automatic descaling. The three-dimensional electrode group in the oxidation chamber consists of several anode plates and cathode plates arranged alternately at equal intervals. Insulating baskets filled with particle packing are placed between adjacent electrode plates. Ultrasonic vibrating plates are integrated around the three-dimensional electrode group. A porous sieve plate and aeration pipeline are installed at the bottom of the three-dimensional electrode group. A spray mechanism with rotating nozzles is installed at the top of the oxidation chamber. The combination of the three-dimensional electrode group, ultrasonic assistance, and circulating spray enhances the oxidation efficiency. This invention removes multiple pollutants from water simultaneously and efficiently in a single reactor without the need for external reagents, through a series of electrochemical reactions. It has the advantages of high treatment efficiency, high automation, and small footprint.

The utility model relates to an electrode chuck which comprises a chuck body, an end base, a cooling flow channel and an anti-adhesion texture. Wherein a chuck is integrally connected to the end seat, cooling flow channels are formed in the two sides of the chuck in a penetrating mode, an anti-adhesion texture is arranged on the surface of the chuck and comprises a plurality of first microtextures, the distance between the first microtextures is B, and the diameter of the first microtextures is D. The electrode chuck solves the problems of contact resistance increase and mechanical wear caused by dust and particle accumulation of the electrode chuck in the prior art.

This invention provides a non-contact testing device and method for coarse-particle packing vibration compaction, relating to the field of geotechnical engineering technology. The device includes a transparent test cylinder apparatus, a compactor, and a monitoring device. The transparent test cylinder apparatus comprises a base plate, a pad plate, and a cylinder body connected in sequence. The base plate is fixedly mounted on a workbench, and the cylinder body is mounted on the base plate. The cylinder body has a hollow cylindrical structure and is filled with a transparent soil sample. The cylinder wall includes transparent and non-transparent areas. The pad plate is positioned between the base plate and the cylinder body. The compactor is positioned above the cylinder body, with its hammering direction pointing towards the center of the compaction cylinder. The monitoring device measures through the transparent area of ​​the cylinder towards the transparent soil sample. The monitoring device includes a binocular industrial camera and an infrared moisture meter. The compactor-cylinder apparatus proposed in this invention effectively solves the problem that traditional test cylinders cannot observe the particle size distribution reorganization and pore structure evolution processes during compaction.

The invention relates to the technical field of battery material preparation, and discloses a ternary precursor and a preparation method thereof, and a positive electrode material and application thereof. The chemical formula of the ternary precursor is Ni < x > Co < y > Mn < z > M < a + b > (OH) < 2 >, and x < lt > is larger than or equal to 0.80; 1, 0 < = y < lt >; 0.1, 0 < = zlt; 0 < = a + b < 0.01, and x + y + z + a + b = 1; m comprises Pb and Sr; the ternary precursor particles are secondary particles formed by stacking strip-shaped primary particles, and each ternary precursor particle comprises a core part located in the interior and a shell part wrapping the core part; the porosity of the core part is 5-12%, and Pb is doped in the core part; the porosity of the shell part is 12-30%, and Sr is doped in the shell part; and the D50 of the ternary precursor is 8-11 [mu] m. The precursor has better electrochemical performance.