43results about How to "Simple interface" patented technology

The invention discloses a steel structural member local corrosion intelligent identification and evaluation method based on deep learning, and the method comprises the steps: obtaining a steel structure surface image through an imaging device, carrying out the feature extraction and corrosion region identification of an input image through a YOLOv12 semantic segmentation model which introduces a CBAM self-attention mechanism, and generating a pixel-level corrosion mask; the actual physical area of the corrosion area is automatically calculated based on an area calculation algorithm of conversion of mask integration and ground sampling distance; the residual bearing performance of the corroded component is evaluated in combination with the corrosion area ratio and the morphological characteristic prediction model; and finally realizing visual display and report output of detection results, area data and performance indexes through a graphical interface. According to the invention, full-process automatic processing of local corrosion of the steel structural member from detection, segmentation, quantitative measurement and calculation to member performance evaluation is realized, and closed-loop intelligent evaluation from visual detection to mechanical evaluation is realized.

The application discloses a kind of hard carbon negative electrode material and preparation method thereof based on waste lithium battery diaphragm preparation.The hard carbon negative electrode material is prepared by using waste lithium ion battery PP / PE diaphragm as raw material, through raw material pretreatment, composite sulfonation pre-crosslinking, transient joule heat pulse carbonization, pickling purification step, its first charge specific capacity is greater than or equal to 310 mAh / g, first coulomb efficiency is greater than or equal to 90%, 1A / g cycle 500 cycles capacity retention rate is greater than or equal to 90%, and the performance is excellent.The application is coupled by composite sulfonation pre-crosslinking and transient joule heat rapid carbonization, compared with traditional process, energy consumption is reduced, and waste diaphragm is efficiently converted to high-performance hard carbon.

The invention discloses a parallel module communication technology based on a serial port bus, and belongs to the technical field of communication. According to the real-time serial port bus, a plurality of independent modules are connected in parallel and communicate and interact with a host, firstly, the modules are made to know own allocated IDs through hardware automatic address allocation, and then the host determines the types and basic information of the modules at the corresponding positions through initial interactive communication; through a polling technology based on time slices, sequential data interaction between a host and a plurality of modules is realized, and meanwhile, high real-time performance is realized through a module preemption communication technology. The system is simple in structure, high in module independence, high in communication real-time performance, clear and easy to use in control logic, and suitable for being used as a short-distance universal parallel application technology of a serial port bus.

The application provides a high-thermal-conductivity diamond / copper composite material and an SPS sintering process thereof, raw material pretreatment: selecting three kinds of monocrystalline diamond particles with different particle sizes, mixing the titanium-plated diamond obtained after vacuum titanium plating treatment; solid dry powder mixing: uniformly mixing a solid additive and graphene modified copper powder to prepare a copper-based composite dry powder; nitrogen intermittent airflow suspension dispersion: adding the titanium-plated diamond into a sealed covering tank to make the titanium-plated diamond suspended and dispersed in the sealed covering tank; atomization covering makes the copper-based composite dry powder uniformly covered on the surface of the titanium-plated diamond to obtain composite particles; vacuum low-temperature degreasing to obtain the composite particles after degreasing, and SPS sintering demolding to obtain the high-thermal-conductivity diamond / copper composite material. The coating is uniform and dense, has no exposure and no agglomeration, and significantly reduces porosity and interface thermal resistance; the proportioning is accurate, the degreasing is thorough, and there is no residue; the generation of brittle phases is inhibited, and the interface combination is excellent; the thermal conductivity is stable and greater than 700 W / (m*K), and the density is greater than or equal to 99%.

The application provides an intelligent interaction experience optimization method and system combined with emotional computing, and belongs to the technical field of intelligent interaction. First, original behavior data flow during multi-round task conversation of a user and a smart terminal is collected, including interface touch pressure distribution trajectory, voice instruction frequency spectrum feature sequence and eye gaze heat map change record. Then, the interface touch pressure distribution trajectory and the eye gaze heat map change record are double-mode fusion coded to generate an operation intention focus area distribution graph. The space emotion distribution atlas is obtained by superimposing the voice emotion color label, and the emotional negative experience blind area is identified therefrom. Finally, interface element strengthening prompt instructions are generated according to the blind area position, the blind area interface element is triggered to visually protrude, and the intelligent interaction experience is optimized.

This invention discloses a method for preparing a composite solid electrolyte and a method for preparing a battery, belonging to the field of battery technology. The method for preparing the composite solid electrolyte includes: 1. uniformly dispersing a modified oxide electrolyte with a nitride coating in a solvent; 2. dissolving lithium salt and polymer in the solvent of step 1 in a mass ratio of 1:2.5, with lithium salt first and then polymer; 3. coating the mixed solution onto a polytetrafluoroethylene mold using a coating machine and placing it in a vacuum drying oven to obtain a composite solid electrolyte membrane. The battery preparation method includes the above-described method for preparing the composite solid electrolyte. This invention can improve the interface between the battery negative electrode and the electrolyte, improve the dendrite condition of the lithium negative electrode interface, and simultaneously isolate some side reactions between the electrolyte and the negative electrode.

This application relates to the field of energy storage materials technology, and more particularly to a titanium-based active material, its preparation method, and its application. The titanium-based active material comprises a mixed oxide having a layered perovskite structure, the mixed oxide having the general chemical formula shown in Formula 1, M... 2± a La x‑y M1 y B n‑z M2 Z O (3n+1)‑δ Q δ Formula 1; in Formula 1, the M site includes H and / or an alkali metal element; the M1 site includes at least one of Mg, Ca, Sr, Ba, and rare earth elements; the M2 site includes a specified transition element and at least one of Al, Ga, In, Si, Sn, Sb, and Bi; the Q site includes at least one of F, Cl, Br, I, N, and S; the B site satisfies: Nb 2n‑3x‑z Ti 3x‑n Or Nb 2n‑3x Ti 3x‑n‑z This titanium-based active material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

The utility model discloses a wave trap, including shell and be located in the inner shell of shell, fixedly connected with inner core and inductance coil on the inner shell, be equipped with the aperture unit for fixing inner core and inductance coil on the inner shell, form the cambered surface unit between aperture unit and the outer wall of inner shell, and aperture unit extends to the inside of inner shell and forms the convex unit, and aperture unit intercommunication cambered surface unit and convex unit. The utility model discloses reasonable structure design, and the aperture of inner shell side surface and bottom surface all adopt non - material punching process, and the aperture around convex circle forms convex unit, increases the interface of the component of interface, and the cambered surface unit is formed to the outside of aperture, forms the tin dissolving groove, makes tin not to flow to other position, guarantees that tin and the interface of component are covered well, thereby guarantees that the welding is good, and it is not easy to appear the phenomenon of false welding.

The present application relates to a lightweight piston and a preparation method, comprising the following steps: S1 vacuum smelting: an aluminum-based alloy is placed in a vacuum induction smelting furnace, a vacuum degree is less than or equal to 10 ‑2 Pa, a smelting temperature is 730-770 DEG C, and a smelting time is 30-60 minutes; the present application uniformly disperses nanocrystals and modified graphene in a melt through process scale, pulse ultrasonic and ultrasonic-electromagnetic synergistic treatment, avoids the agglomeration problem of traditional external particles, reduces the interface energy of the seed and the aluminum matrix at the atomic scale through the doping of carbon and boron, provides dispersion strengthening and heterogeneous nucleation at the nanometer scale through titanium diboride and titanium carbide seeds, provides interface optimization and high-temperature pinning through a molybdenum tungsten shell layer, provides self-lubrication and heat conduction channels at the submicron scale through modified graphene, provides skeleton reinforcement at the micron scale through a three-dimensional network structure, and provides plasticity through a refined aluminum matrix.

This invention discloses a barium sulfate@aluminum borate-MXene composite powder and its preparation method, belonging to the technical field of high-performance inorganic composite functional materials. The composite powder possesses a unique core-shell-lamellar structure: barium sulfate nanospheres form the core, coated with a uniform aluminum borate layer to form the core-shell nanospheres. These barium sulfate@aluminum borate core-shell nanospheres are further loaded onto the surface of two-dimensional MXene nanosheets. The preparation method includes: synthesizing barium sulfate nanospheres via precipitation; in-situ coating of aluminum borate onto their surface using a hydrothermal method to form a barium sulfate@aluminum borate core-shell structure; preparing MXene nanosheets via liquid-phase exfoliation; and finally mixing and assembling the two to obtain the final product. The core advantage of this invention lies in achieving a triple synergy of high-temperature flame retardancy of aluminum borate, rigid support of barium sulfate, and interface enhancement and barrier effect of MXene through the above-mentioned multi-level structural design.

The application provides a low-carbon road grouting material dry powder composition with self-regulating performance and a preparation method thereof, which comprises the following components based on 100 parts of total weight: 45-55 parts of slag, 25-30 parts of steel slag, 5-10 parts of fly ash, 1-2 parts of modified bentonite, 10-15 parts of activator, 0.5-1 part of expanding agent, 0.5-1 part of water reducing agent, 0.1-0.2 part of interface agent and 1-2 parts of phase change water retaining agent. The modified bentonite is used to promote the dispersion of the grouting material in water by using the space stereo structure of alkyl chain and hydroxyl isomerization; the phase change water retaining agent is used to regulate the moisture release of the water retaining material by changing the phase change state of paraffin at different environmental temperatures, so as to realize the fine regulation of the moisture content in the grouting material; finally, the polysiloxane powder is used to promote the formation of a good interface between the grouting material and the silicon dioxide at the repair position, so that the self-regulation and stability of the performance of the grouting material according to the environmental conditions are realized.

The invention relates to the technical field of information retrieval and machine learning, and provides a domain-to-entity adaptive document rearrangement method, which comprises the following steps of: inputting a plurality of discrimination sample pairs into a rearrangement model to calculate comprehensive correlation scores, and sorting to obtain a corresponding document rearrangement result; the rearrangement model comprises the steps of pre-training a rearrangement module to output a semantic basic correlation score; the domain / entity identification module generates domain weight parameters of a plurality of target domains through a classification network and determines corresponding company entities, and the combined adaptive adjustment module performs sparse selection on low-rank adaptive branches corresponding to the plurality of target domains and performs incremental feature modeling on a discrimination sample pair based on a started low-rank matrix; generating a corresponding incremental correlation score; the reordering execution module is used for ordering the comprehensive correlation scores and outputting results, a specific knowledge base or retrieval implementation does not need to be limited, flexible butt joint with an existing retrieval assembly can be achieved, and the method has the advantages of being fast in convergence, low in cost and the like in the aspects of cross-subject migration and entity-level adaptation.

The invention belongs to the field of dangerous source field operation, and provides a dangerous source field operation overload early warning method and system, a storage medium and equipment, and the method comprises the steps: selecting a target region, and collecting laser point cloud data in the target region; preprocessing the obtained laser point cloud data to generate a three-dimensional model of the target area; gNSS position data of a target person is acquired; gNSS position data of the personnel and the three-dimensional point cloud model are imported into a digital twin system at the same time; delimiting a management and control area around the hazard source, and determining the number of personnel in the management and control area by the digital twin system according to the GNSS position data of the personnel; and judging the risk level of the control area according to a preset personnel threshold value and a time threshold value, and sending corresponding early warning information to the target personnel in real time. The problems that a personnel positioning system and a two-dimensional plane GIS map lack height information and are low in map resolution are solved.

The utility model discloses a multi-mode wave-propelled unmanned aircraft wing-body fusion navigation body, which relates to the technical field of unmanned aircrafts, and comprises a navigation body main body, and the navigation body main body comprises an outer skin, an internal skeleton and a solid buoyancy material filled in the internal skeleton; the appearance of the navigation body main body adopts a wing body fusion design; the wing section of the navigation body main body adopts an NACA asymmetric wing section; the upper surface of the navigation body main body is designed into a curved surface with an integrated functional unit; a part of components of the dynamic buoyancy adjusting module are integrated in the head section of the navigation body main body; a watertight instrument cabin mounting space is integrated in the middle section of the navigation body main body; an emergency load rejection device mounting space is integrated below the tail section of the navigation body main body; and stabilizing wings are arranged below the tail end of the navigation body main body. The multi-modal wave-propelled unmanned aircraft wing body fusion navigation body has the advantages of high hydrodynamic efficiency, optimized wave energy capture performance, good structural integration and capability of supporting multi-modal navigation.

The application discloses a kind of polypropylene coating and preparation method thereof, belong to polypropylene coating technical field, first by photo-induced mercapto-alkene reaction preparation amino tung oil acid, again by template method copolycondensation synthesis mesoporous organosilica amino tung oil acid, simultaneously polypropylene and trifluoroethyl methacrylate melt grafting obtains TFEMA grafted modified polypropylene, finally with xylene as solvent, bismaleimide is used as crosslinking agent, and each component is blended to obtain polypropylene coating;The application is endowed with low surface energy and weathering stability by introducing fluorine-containing group to coating, combined with the ultraviolet shielding function of mesoporous organosilica, supplemented by BMI dynamic reversible crosslinking to build strong adhesion and self-repairing network, synergistically solve the technical problems that traditional polypropylene coating is poor in ultraviolet stability, weak in adhesion, and easy to age, significantly improve the outdoor durability, self-repairing and corrosion resistance of coating, and be applicable to outdoor building materials, automobile shell and other high-end protection fields with strict durability requirements.

This application provides a method and system for optimizing intelligent interactive experiences by combining affective computing, belonging to the field of intelligent interaction technology. First, it collects raw behavioral data streams from multi-turn task dialogues between the user and the intelligent terminal, including interface touch pressure distribution trajectories, voice command spectral feature sequences, and eye gaze heatmap changes. Next, it performs dual-modal fusion encoding on the interface touch pressure distribution trajectory and eye gaze heatmap changes to generate an operation intent focus area distribution map. Then, it overlays voice emotion color markers to obtain a spatial emotion distribution map, identifying negative emotion blind spots. Finally, it generates interface element enhancement prompts based on the blind spot locations, triggering the visual protrusion of interface elements in the blind spot and optimizing the intelligent interactive experience.

The invention provides an electrochemical sensor constructed based on an NP-G-AuPd NFs composite material. The electrochemical sensor comprises a working electrode and a sensing material modified on the working electrode, the sensing material is a nitrogen and phosphorus co-doped graphene-AuPd nanoflower composite material. Therefore, when the AuPd NFs and the NP-G are mixed, the AuPd NFs and the NP-G can be embedded in the middle of the graphene, the graphene is stripped to present a single-layer yarn-shaped structure, the conductivity of the graphene can be enhanced, the larger specific surface area of the graphene is a good interface for loading the AuPd NFs, and the NP-G and the nano material are mixed to finally prepare the NP-G-AuPd NFs composite material with better conductivity. An electrochemical sensor based on the NP-G-AuPd NFs composite material is constructed to detect diclofenac sodium, and a DPV test result shows that the composite material has good electro-catalytic performance and can be used for determining an actual sample.

This application discloses a method for determining a display mode and a vehicle, relating to the field of vehicle control technology. The method includes: determining the first importance of a vehicle function to be displayed to the occupants based on their attribute information; determining the second importance of the vehicle function to the current driving process based on the vehicle's current driving scenario; determining the vehicle's usage preference for the vehicle function based on its historical usage information; and fusing the first importance, second importance, and usage preference levels to determine the target display mode corresponding to the vehicle function based on the fusion processing result. The technical solution of this application embodiment can make the target display mode more closely match the actual driving conditions of the vehicle and the actual needs of the occupants, thereby improving the convenience and experience of occupants using vehicle functions.

The present application relates to the technical field of profile conveying and storing, and provides a profile conveying and storing device.The device comprises a feeding unit, a stacking unit, a storing and conveying section, an upper frame conveying section and a storage frame; the upper frame conveying section is provided with a first transfer device, and the storing and conveying section is provided with a second transfer device.The first transfer device transfers the storage frame provided with a cushion strip from the upper frame conveying section to the second transfer device, the feeding unit conveys the profile to the cushion strip, the stacking unit drives the cushion strip and the profile to move into the empty storage frame on the storing and conveying section to realize automatic stacking, and the second transfer device unloads the empty storage frame on the storing and conveying section after the cushion strip is emptied.The present application realizes automatic supply of the storage frame, automatic stacking of the profile and automatic recovery of the empty frame through the cooperation of the units, reduces manual intervention, and improves the operation efficiency and stacking regularity.

The invention relates to the technical field of water-based damping materials, and discloses a low-expansibility water-based damping material and a preparation method thereof.The low-expansibility water-based damping material is prepared from, by mass, 40-60 parts of water-based polyurethane-acrylate resin, 20-30 parts of water-based polyurethane-acrylate resin, 20-30 parts of water-based polyurethane-acrylate resin, 20-30 parts of water-based polyurethane-acrylate resin, 20- 10 to 20 parts of a silane coupling agent; 30-60 parts of a damping filler; 5-10 parts of a dispersant; 3-10 parts of a film forming agent; 0.3 to 1 part of a defoaming agent; and 0.5-3 parts of a thickening agent. The damping characteristic of the WPUA resin is organically combined with the interface enhancement and network crosslinking functions of the silane coupling agent, and the comprehensive high-performance water-based damping material with low expansion, high stability, strong adhesion and corrosion resistance is successfully prepared.

This invention discloses a piezoelectric MEMS device, its fabrication method, and its applications, belonging to the field of microelectromechanical systems (MEMS) technology. The fabrication method includes: preparing an SOI wafer; performing PSG spin-coating annealing and / or metallization modification on the device layer surface to form a conductive seed layer; depositing a piezoelectric layer; simultaneously etching the insulating layer, modified device layer, and piezoelectric layer using a specific mixed gas or pulse modulation process; forming a metal electrode layer and a bonding metal layer; and bonding and integrating with a TSV structure. This invention replaces traditional metal electrodes with metallization modification, avoiding electrode fatigue and aging, and improving device reliability; the use of single-mask synchronous etching and vapor phase release technology eliminates overlay and bonding errors, reducing process complexity and cost, making it suitable for high-performance sensors, ultrasonic detection, audio, and smart hardware.

The invention discloses an intelligent sleep environment adaptation method and system based on personal parameters of a user. The method comprises the steps that the personal parameters of the user and real-time monitoring data are acquired; substituting the acquired personal parameters of the user and the real-time monitoring data into a pressure calculation model to calculate an expected pressure value of each sampling contact point; substituting the acquired personal parameters of the user and the real-time monitoring data into a joint angle model to calculate an expected joint angle; substituting the calculated expected pressure value and the expected joint angle into an optimization function for optimization so as to obtain an optimal adaptive parameter; and adjusting the height of the mattress based on the optimal adaptive parameters. The method has the advantages of personalized optimization, customized design, real-time feedback and adjustment, energy consumption reduction, user friendliness and high adaptability.

The invention discloses a polycarbonate composition as well as a preparation method and application thereof. The polycarbonate composition comprises the following components in parts by weight: a, polycarbonate resin; b parts of amorphous copolyester PCTG; c parts of an inorganic filler; d) a styrene-maleic anhydride copolymer; the polycarbonate resin comprises silicon copolymerized polycarbonate and non-silicon copolymerized polycarbonate, and based on the weight of the polycarbonate resin, the weight percentage of the silicon copolymerized polycarbonate is e; wherein the relation of a, b, c, d and e meets the condition that 100a / (a + b) is greater than or equal to 33; 100c / (a + b) < = 2.5; 3 < = 100d / (a + b) < = 7; and ae / (a + b) > = 0.22. The polycarbonate composition disclosed by the invention has good impact resistance at low temperature below zero on the basis of maintaining a certain light transmittance.

The utility model provides a soft package battery, which belongs to the field of soft package batteries and comprises at least one exhaust passage arranged on a battery main body. The gas storage bag is arranged outside the battery main body and is provided with a gas inlet; two ends of the air duct are respectively communicated with the exhaust passage and the air inlet; the one-way circulation piece is arranged in the air guide pipe; the exhaust passage abuts against the top of the battery main body; and the one-way circulating piece enables gas in the battery main body to flow into the gas storage bag from the exhaust passage to the gas inlet in a one-way manner. According to the utility model, the exhaust passage is arranged at the top of the soft package bag of the battery main body, and the exhaust passage is communicated with the external gas storage bag through the gas guide pipe with the guide circulation piece, so that gas generated in the aging process can be guided to be exhausted, and the gas is effectively prevented from reversely permeating into the soft package bag of the battery from the gas storage bag; meanwhile, the exhaust passage is positioned at the top of the battery main body and is communicated with the gas guide pipe, so that the problem of insufficient electrolyte retention capacity caused by the fact that the electrolyte is discharged along with gas produced by the battery cell can be effectively relieved.

The application discloses a high-performance oxygen evolution reaction composite electrocatalyst and a preparation method thereof, and belongs to the field of electrocatalytic material preparation. The application solves the problem that it is difficult to realize uniform loading and precise size control of RuO2 nanoparticles on a three-dimensional porous complex substrate (foamed nickel), thereby affecting the performance and repeatability of the prepared electrocatalyst. The method comprises the following steps: sulfidizing the foamed nickel with thiourea first, and then uniformly depositing RuO2 nanoparticles on the surface of the foamed nickel-based Ni3S2 by using an ALD technology. The application precisely controls the size of the RuO2 nanoparticles on the surface of the foamed nickel-based Ni3S2 to be 1.5-3.5 nm, and the surface density to be 0.8-1.2´10 12 / cm 2 , so that the conductivity and electrochemical activity of the catalyst can be improved, the charge transfer rate can be improved, and the OER performance of the electrocatalyst is improved.

The invention discloses a three-path NTC broken line detection circuit applied to a PCS product, which is used for broken line detection during temperature detection of an IGBT module, and comprises a power supply module circuit, a partial voltage detection circuit, a comparator output circuit, a third voltage-regulator tube and an alarm signal output circuit, the power supply module circuit is connected with a power supply, and is electrically connected with the alarm signal output circuit through the power supply module circuit, the partial voltage detection circuit, the comparator output circuit and the third voltage-regulator tube in sequence; the partial pressure detection circuit comprises a first thermistor, a second thermistor and a third thermistor; the beneficial effects are that the circuit has the core advantage of being capable of automatically detecting disconnection or poor plugging faults of any NTC sensor (the first thermistor, the second thermistor and the third thermistor) in A, B and C phases in real time. Once such a fault occurs, the circuit can immediately generate a clear and high-level alarm signal and directly transmit the alarm signal to a control system.

The application provides an imidazole ring-containing polyimide / ZIF-8 composite nanofiber membrane and a preparation method and application thereof, and the preparation method comprises the following steps: preparing an imidazole ring-containing polyamide acid spinning solution; preparing an imidazole ring-containing polyamide acid nanofiber membrane by using the imidazole ring-containing polyamide acid spinning solution through an electrostatic spinning method; performing thermal imidization treatment on the imidazole ring-containing polyamide acid nanofiber membrane to obtain an imidazole ring-containing polyimide nanofiber membrane; and repeatedly immersing the imidazole ring-containing polyimide nanofiber membrane in a ZIF-8 solution for several times, and then drying to obtain the imidazole ring-containing polyimide / ZIF-8 composite nanofiber membrane. The imidazole ring-containing polyimide / ZIF-8 composite nanofiber membrane anchors ZIF-8 on the polyimide fiber through cation-π interaction, and effectively improves the binding force between the polyimide and ZIF-8.

The invention discloses a positive electrode material as well as a preparation method and application thereof. The positive electrode material is obtained by carrying out anion doping on LiFeCl. The preparation method comprises the following steps: 1, weighing the raw materials LiCl, FeCl3 and the anionic dopant; and 2, carrying out ball milling on the weighed raw materials at 200 rpm for 2 hours by adopting a high-energy mechanical ball milling method, and then carrying out ball milling at 500 rpm for 10 hours to obtain uniform powder, namely a finished product of the positive electrode material. The positive electrode material is used for preparing a positive electrode for an all-solid-state battery. According to the invention, the intrinsic ionic conductivity of LiFeCl is improved through anion doping, so that the addition amount of the solid electrolyte in the positive electrode can be greatly reduced, thereby ensuring ion transmission, realizing higher active substance proportion and energy density, and reducing the cost and interface complexity.

The utility model belongs to silicon carbide crystal preparation technical field relates to a kind of for controlling the airflow guide structure of silicon carbide crystal growth interface, including shell, upper graphite sheet, middle graphite sheet and lower graphite sheet.The utility model utilizes the spherical surface structure of lower graphite sheet lower part to guide the vaporization of edge to center convergence and from multiple third through-holes, when passing through middle graphite sheet, utilize the annular structure of middle graphite sheet to make the vaporization of center fast pass, the vaporization of edge is blocked by multiple second through-holes and slowly pass, finally make the vaporization uniform through multiple first through-holes, so that the vaporization is crystallized on the surface of seed crystal uniformly, avoid the concentration of edge vaporization greater than the concentration of center vaporization caused by the temperature of edge silicon carbide powder higher than the temperature of center silicon carbide powder, make the crystal ingot interface more uniform in the initial stage of crystal growth, improve the stability of silicon carbide crystal growth process.