533 results about "Magnetic response" patented technology

A method of continuous 3D printing to print an article is provided. The method includes displacing a nozzle of the 3D printer in a nozzle displacement direction; extruding the ink from the nozzle concurrently with the displacement of the nozzle to form an extrudate on the porous substrate; and displacing the rotating magnetic field in the nozzle displacement direction simultaneously with the displacement of the nozzle. The ink includes a plurality of magnetically responsive particles and a colloidal gel. The colloidal gel may include fumed silica in an aqueous solution.

According to the displacement modulation and optical assistance-based SERF atom magnetometer magnetic imaging method, an SERF atom magnetometer integrated with a magnetic flux guider is used as a magnetic sensor, and low-frequency magnetic field modulation is introduced to the magnetic sensor by controlling a to-be-tested sample to perform periodic infinitesimal displacement in the sensitive direction of the magnetic sensor; the modulation signal is demodulated by combining a phase-locked amplification technology, and a magnetic response signal subjected to phase-locked demodulation at each spatial position is extracted; constructing a magnetic response matrix through two-dimensional track scanning of micron-order step pitch; an image acquisition module and a reflection optical assembly are introduced for spatial registration so as to monitor the relative position in real time, and the visibility and controllability of the magnetic imaging process are guaranteed; the point-by-point detection of fT-level weak magnetic signals can be realized on the premise that an array structure is not needed; the low-frequency noise interference can be effectively inhibited, the stability and definition of direct-current and low-frequency magnetic field imaging are improved, and the method is suitable for high-resolution space imaging application of weak magnetic sources such as magnetic domain structures, nervous tissue slices and ancient rock samples.

The invention belongs to the technical field of super-hydrophobic materials, and particularly relates to a preparation method and application of magnetic response multifunctional super-hydrophobic biomass aerogel. The super-hydrophobic PDMS-coated CMIL-101 / CS aerogel is prepared by combining chitosan (CS), a magnetic porous carbon material (CMIL-101) and polydimethylsiloxane (PDMS) through a freeze drying technology, so that efficient oil-water separation and organic pollutant microplastic removal are realized. The aerogel utilizes magnetic response and photo-thermal characteristics, promotes oil adsorption and treats high-viscosity oil in a magnetic field, simplifies the purification process, and has important application value for water body remediation.

The invention provides a graphene-boron nitride composite epoxy resin material and a preparation method thereof, the surface of a graphene-boron nitride filler is modified to obtain a filler with magnetic response, the filler is added into epoxy resin, and the filler can be in more sufficient contact and ordered arrangement under the action of an external magnetic field, so that the graphene-boron nitride composite epoxy resin material is obtained. The heat conductivity coefficient of the composite material is effectively improved. Tests show that when the filler accounts for 25%, the heat conductivity coefficient reaches 2.1 (W / mk), and the friction coefficient can be effectively reduced and is reduced by about 30% compared with pure epoxy resin. The research of the invention provides a new thought and method for preparing the epoxy resin-based composite material with high heat-conducting property, expands a new field and direction for the application of epoxy resin in the field of electronic packaging, and has practical significance.

The invention provides a double-source magnetic field comprehensive detection and analysis method and system based on a buried metal pipeline, and the method comprises the following steps: applying composite magnetic field excitation to a target section of the pipeline, and synchronously collecting mixed magnetic response signals through a magnetic sensor array disposed along the axial direction of the pipeline. The mixed signal is separated into a slowly varying component representing quasi-static background stress and a burst component representing a pipeline stress event, and the burst component is extracted. And carrying out dispersion elimination inverse operation processing on the extracted burst component, and accurately determining the position information of the pipeline stress event on the pipeline through joint optimization solution by combining the time difference of arrival and the energy attenuation of the original waveform characteristics on different sensors. And inputting energy and position information of a pipeline stress event into the model, and continuously calculating and updating an accumulated damage factor of a specific position of the pipeline. According to the invention, the stress event of the buried metal pipeline can be accurately identified and positioned.

The invention discloses a shielding material evaluation method and system based on big data and a transient electromagnetic method, and relates to the technical field of shielding material evaluation, and the method comprises the steps: exciting a shielding material through a high-frequency pulse, obtaining electromagnetic parameters such as magnetic conductivity, dielectric constant, conductivity and shielding effectiveness, and carrying out the evaluation of the shielding material; and the transient electromagnetic response of the material is recorded by using a sensor array in different incident angles, polarization directions and frequency ranges, and an excitation signal is dynamically adjusted. An electromagnetic signal is decomposed by adopting an empirical mode, different frequency components are extracted, signal complexity is calculated through multi-scale entropy analysis, and an electromagnetic absorption mode is quantified. And optimizing a shielding effectiveness calculation model on the basis of electromagnetic wave transmittance in combination with time attenuation, multiple scattering and dynamic absorption characteristics, and finally optimizing shielding material parameters. The method has better effects in the aspects of calculation efficiency, adaptability and accuracy.

Microparticles for detecting biological materials are provided. Each of the microparticles includes: a core-shell structured microparticle consisting of a core including a magnetically responsive metal and a shell layer surrounding the core and having a uniform thickness; and capture probes introduced onto the shell layer to capture biological materials.

The invention discloses a preparation method of a programmable soft robot. The preparation method comprises the following steps: mixing magnetic particles, Ecoflex, PDMS and a curing agent according to a certain mass ratio, and stirring to obtain a magnetic response soft material; preparing a male mold and a female mold, assembling to form a preparation mold, and curing the magnetic response soft material in the preparation mold to obtain the soft robot; the solidified magnetic response material is magnetized and heated at the same time, and the programmable soft-bodied robot is obtained; and after cooling to the room temperature, opening the preparation mold, and taking out the programmable soft robot. The invention further discloses the programmable soft-bodied robot and a preparation mold of the programmable soft-bodied robot. The process is simple, the manufacturing cost is low, a programmable three-dimensional magnetic domain distribution structure is rapidly achieved through an in-situ heat-assisted magnetizing method, magnetic domain distribution is accurately controlled, the programmable soft robot has the multi-mode movement capacity and can execute transportation tasks in the liquid environment, and directional operation and accurate control are achieved.

The invention relates to the technical field of preparation of composite functional materials, in particular to a scale structure coating based on a PDMS / Co (at) SiO2 composite material and a preparation method and application of the scale structure coating. The preparation method comprises the following steps: mixing vinyl-terminated polydimethylsiloxane with methylhydrosiloxane to obtain a pre-polymerized solution; dispersing cobalt powder in the prepolymerization liquid to obtain a PDMS / Co mixture, coating the PDMS / Co mixture on the surface of a mold with a scale structure, and stripping the mold after curing to obtain a PDMS / Co scale array; and modifying SiO2 nanoparticles on the surface of the PDMS / Co scale array to obtain the scale structure coating based on the PDMS / Co coated SiO2 composite material. According to the invention, by constructing the multistage micro-nano structure and cooperating with the magnetic response and photothermal effect, a ''magnetostrictive unbalance-elastic rebound'' liquid drop directional transport mechanism and a photothermal-super-hydrophobic cooperative anti-icing function are constructed, and the problems of low energy efficiency, poor environmental adaptability and easy failure under extreme conditions of an existing anti-icing material are solved.

The invention relates to a light / heat / magnetic detachable high-strength polyurethane adhesive as well as a preparation method and application thereof. The light / heat / magnetic detachable high-strength polyurethane adhesive comprises a polyurethane adhesive and a functional filler. According to the light / heat / magnetic detachable high-strength polyurethane adhesive prepared by the preparation method disclosed by the invention, the colloid is black, and the adhesive has excellent light absorption performance and can realize rapid separation of an adhesive interface under infrared irradiation through a heat effect; meanwhile, the ferroferric oxide can be vibrated and heated under the action of an external magnetic field due to the magnetic response characteristic of the ferroferric oxide, so that fracture and separation of the adhesive layer are promoted. By means of the technology, efficient and reversible disassembly of parts bonded through the hot melt adhesive is achieved, possibility is provided for recycling and reusing of bonding materials and devices, and the problem that traditional polyurethane hot melt adhesive cannot be recycled is solved.

The invention provides a butt joint device based on electromagnetic connection and an underwater navigation device, and relates to the technical field of underwater vehicles, the butt joint device comprises a first butt joint assembly and a second butt joint assembly, the first butt joint assembly comprises a first nut and a magnetic driving part arranged on the first nut in a sleeving mode, the second butt joint assembly comprises a telescopic rod, a connecting rod, a second nut and a magnetic response part, one end of the connecting rod is connected with the telescopic end of the telescopic rod, the other end is in threaded connection with the second nut, and the magnetic response part sleeves the periphery of the second nut. The magnetic driving part is used for attracting the magnetic response part to preliminarily butt the first butt joint assembly and the second butt joint assembly, the fixed end of the telescopic rod is driven to rotate to drive the connecting rod to rotate, and the connecting rod rotates and moves in the axial direction of the second nut to be in threaded connection with the inner wall of the first nut so as to secondarily butt the first butt joint assembly and the second butt joint assembly. Radial and axial wandering is eliminated, the stability and anti-disturbance capability after butt joint are enhanced, and the overall operation quality and efficiency are improved.

The invention provides an on-line intelligent monitoring system based on a coil, and relates to the technical field of data processing, and the system is used for calculating the comprehensive coupling degree between coil magnetic field change and current response according to monitoring data, obtaining a magnetic response correlation value, constructing a distribution matrix of coil magnetic field distribution characteristics, obtaining a coil local coupling map, and obtaining a current response correlation value. The method comprises the following steps: calculating the influence degree of temperature change on magnetic flux energy offset, obtaining a temperature drift correction value, identifying the relative offset trend of electromagnetic response and energy compensation, obtaining a phase offset, calculating the response self-stabilization degree of a coil in long-term operation, obtaining a dynamic balance factor, and identifying the dynamic characteristics of the coil in electromagnetic, temperature and space response dimensions. And judging whether the coil is in a response instability state or a normal operation state to obtain monitoring state result data. The state of the coil is monitored by identifying coupling characteristics of electrical parameters and temperature of the coil.

The invention discloses a GIL electromagnetic property detection method and system based on field circuit-mechanical coupling, and the method comprises the steps: building an electromagnetic field-circuit-mechanical coupling mathematical model based on a circuit mathematical model through employing a stiffness matrix of a magnetic vector position, a stiffness matrix of a conductor eddy current, and a load matrix of a conductor conduction current; engineering sections are divided, a finite element two-dimensional simulation model is built, an equivalent external circuit is built, coupling connection is conducted through an external circuit port voltage matrix, and an electromagnetic property detection model of the GIL is obtained; performing iterative solution to obtain transient electromagnetic response of each engineering section, wherein the transient electromagnetic response comprises magnetic flux density, current density and node transient electromagnetic force; detecting whether electromagnetic response abnormity exists in the actual operation process of the GIL or not; and simulating the electromagnetic stress of the GIL component in the abnormal engineering section in the three-dimensional structure field by adopting harmonic response analysis, and checking the electromagnetic and mechanical characteristics of the GIL. According to the method, the electromagnetic characteristics of the GIL can be simulated more accurately, the applicability is wide, the operation speed is high, and guarantee is provided for GIL short-circuit fault monitoring and safe and stable operation.

A system for monitoring conveyor belts is disclosed. The system includes a generator array, a sensor array and circuitry. The generator array is configured to apply a magnetic field to a conveyor belt. The sensor array is configured to measure a plurality of magnetic responses. The circuitry is configured to determine the source or cause of the observed steel cord damage based on the measured plurality of magnetic responses.

The invention discloses an inorganic normal-temperature rapid-hardening coal-rock mass reinforcing and filling material, and relates to the technical field of mine reinforcement. The material comprises a liquid A and a liquid B, the liquid A is prepared from cement, fly ash, magnetic nano silicon dioxide, citric acid and a layered bimetal oxide-sodium hexametaphosphate compound; and the liquid B comprises water glass, superfine limestone and water. During use, the liquid A and the liquid B are mixed according to the volume ratio of 1: 1 and injected into a target area, and a 1.5 Tesla magnetic field is applied at the initial stage of grouting until the grout is initially set. Through the synergistic effect of the compound protection dispersing agent, the magnetic particles and an external magnetic field, the technical problems that an existing material is unstable in performance due to temperature change, nanoparticles are prone to agglomeration, and magnetic response is attenuated in an alkaline environment are effectively solved; the technical effects of rapid solidification, high strength and excellent durability in high-temperature, low-temperature and complex mine environments are achieved.

Magnetic-responsive compositions for roofing materials are provided. A composition comprises a polymer and a magnetic-responsive additive. The magnetic-responsive additive, when subjected to a magnetic field, is aligned in a horizontal direction sufficient to increase a reflectivity of the composition upon curing to form a roofing material. A kit comprising a composition and a roller device is provided. The roller device comprising a roller, wherein the roller contains a magnetic array. Related systems and related methods are also provided.

Provided herein are Avena sativa light, oxygen, voltage 2 (asLOV2) protein domains comprising one or more amino acid substitution(s) as compared to the wild type asLOV2 domain (SEQ ID NO: 1) wherein the mutant asLOV2 domain has an increased magnetic response as compared to the wild type asLOV domain.

The invention relates to the technical field of photonic crystal materials, in particular to a wide-temperature-range low-energy-consumption multistable photonic crystal film and a preparation method and application thereof.The photonic crystal film is composed of a physical crosslinking type hydrogel matrix and magnetic response type photonic crystals fixed in the physical crosslinking type hydrogel matrix, the photonic crystal film has magnetic field adjustability of colors in a sol state above a phase change point of the hydrogel, and magnetic assembly colors in the sol state can be recorded and developed in a gel state at the temperature of the phase change point. According to the wide-temperature-range low-energy-consumption multistable photonic crystal film, the element for regulating and controlling the optical property is the magnetic photonic crystal, the color is changed based on magnetic field response, compared with other external fields such as light, electricity and chemical stimulation, the magnetic field has the properties of non-contact, controllability and the like, and adjustment is easy and convenient. The photonic crystal film is rich in color change variety, energy loss only occurs in the color regulation and control stage, color stable display does not need external field assistance, and therefore the photonic crystal film is a low-energy-consumption multistable photonic crystal film.

The invention discloses a high-end leachate membrane landfill leachate full-quantitative treatment method, and belongs to the technical field of leachate full-quantitative treatment.The high-end leachate membrane landfill leachate full-quantitative treatment method comprises the following steps of S1, pretreatment, S2, HMBR treatment, S3, electrochemical catalytic oxidation, S4, NF-RO separation and S5, control system integration. The core-shell structure of the magnetic nano flocculant can synchronously adsorb heavy metals and organic matters, the sedimentation time is shortened by the magnetic response characteristic, and the subsequent treatment load is reduced; the cross-flow filtration design of the ceramic membrane is high in anti-pollution capacity, frequent cleaning is not needed, the agent consumption and maintenance cost of the pretreatment unit are reduced, and the system stability is improved.

The present application provides a frequency selective surface unit having large-angle stability. The frequency selective surface unit comprises a dielectric layer, a first metal layer, and a second metal layer. The dielectric layer is provided with an installation portion, and the installation portion is used to achieve cross-connection of two frequency selective surface units. The first metal layer is disposed on a side of the dielectric layer. The second metal layer is disposed on the side of the dielectric layer facing away from the first metal layer, and a capacitive structure or component is provided on the second metal layer. In the present application, an electric response can be generated on the first metal layer, and a magnetic response can be generated on the second metal layer, so that electromagnetic control can be performed on a frequency selective surface device provided with the frequency selective surface units arranged in a cross configuration. In this way, the frequency selective surface device having a three-dimensional structure can achieve high selectivity by having high wave transmittance in a high-frequency first operating frequency band and having high reflection in a low-frequency second operating frequency band. The device also have low loss, and achieves dual-polarization large-angle stability.

The invention provides a preparation method of a novel magnetic response polyether demulsifier, which comprises the following specific steps: accurately weighing a certain amount of ferric chloride hexahydrate, mixed polyether demulsifier and multi-walled carbon nanotube, adding into a beaker together with a certain amount of solvent and assistant, carrying out ultrasonic treatment for a period of time to uniformly mix, adding into a reaction kettle with a polytetrafluoroethylene lining, and carrying out ultrasonic treatment for a period of time to obtain the magnetic response polyether demulsifier. Then introducing nitrogen for purging replacement, putting the reaction kettle into a drying oven, heating to a certain temperature, reacting for a certain time, cooling to room temperature after the reaction is completed, taking out, washing with an ethanol-water solution for multiple times, and drying to finally prepare the novel magnetic response polyether demulsifier. The prepared novel magnetic response polyether demulsifier has a good demulsification effect on thick oil emulsion with the water content higher than 90%, and under the action of an external magnetic field, rapid demulsification can be achieved, and recycling is easy to achieve.

The invention provides a frequency selective surface unit with large-angle stability, the frequency selective surface unit comprises a dielectric layer, a first metal layer and a second metal layer, the dielectric layer is provided with a mounting part, and the mounting part is used for enabling two frequency selective surface units to be connected in a cross manner; the first metal layer is arranged on one side of the dielectric layer; the second metal layer is arranged on the side, away from the first metal layer, of the dielectric layer, and a capacitive structure or device is arranged on the second metal layer. According to the frequency selective surface device, the first metal layer can generate the electric response, and the second metal layer can generate the magnetic response, so that electromagnetic regulation and control can be performed on the frequency selective surface device with the crossed frequency selective surface units; the frequency selective surface device with the three-dimensional structure can have high selectivity of high wave transmission in the first working frequency band with relatively high frequency and high reflection in the second working frequency band with relatively low frequency, loss is low, and dual-polarization wide-angle stability is achieved at the same time.

The invention relates to the technical field of printing devices, and discloses a magnetic field assisted rapid liquid printing device which is characterized in that a discharge pipe at the bottom of a raw material tank is connected with a spray head, a coil assembly is arranged around the discharge pipe, and a spiral heating pipe assembly located above the coil assembly is arranged around the discharge pipe; a sealing end cover assembly is arranged at the top of the raw material tank, an air compression assembly is further arranged in the sealing end cover assembly, and an air supply assembly is further arranged on the sealing end cover assembly; the coil assembly is electrified to generate an adjustable magnetic field, and is matched with the spiral heating pipe assembly to heat the base fluid, so that the viscosity is reduced, the particle orientation is ensured, the problem of low orientation rate in the traditional technology is solved, and the uniformity of the magnetic response performance of the MRE base fluid is improved. Air is periodically pressed into the raw material tank by the air pressing assembly, the air pressing assembly cooperates with a spiral blade of the stirring and extruding assembly to form a double-power system of mechanical extrusion and air pressure pushing, and the MRE base liquid can be smoothly and thoroughly extruded.

The invention discloses an overlying strata fracture electromagnetic imaging method and a grouting system, and particularly relates to the technical field of geological fracture imaging. The invention discloses an overlying strata fissure electromagnetic imaging method and a grouting system. The method comprises the steps that S1, magnetic source slurry containing permanent magnetic material particles is injected into a target overlying strata fissure area through the grouting system; s2, magnetizing the magnetic source slurry injected into the crack through an electromagnetic coil group arranged on the grouting system; s3, tracer slurry containing magnetic responsive nanoparticles is injected into the fissure area where the guiding magnetic field is formed through a grouting system; s4, in-hole electromagnetic detection equipment is adopted to scan the fracture area filled with the tracing slurry, and electromagnetic response data are obtained; and S5, processing and analyzing the electromagnetic response data. According to the overlying strata fissure electromagnetic imaging method and the grouting system provided by the invention, through a technical path of'pilot magnetism and post tracing ', the tracing slurry is actively guided to directionally migrate by utilizing the magnetic field, and high-precision filling and electromagnetic imaging of an overlying strata fissure network are realized.

The invention relates to the technical field of preparation of high polymer materials and intelligent response materials, in particular to a preparation method of polyacrylamide for treatment. And constructing a quaternary polymerization system with acrylamide, a temperature-sensitive monomer and a zirconium-based metal organic framework-graphene quantum dot composite material. Magnetic response interpenetrating network gel is formed by induction of a photo-magnetic synergistic field, bacterial cellulose nanofibrils and a calcium silicate layered structure are introduced through a biomimetic mineralization technology, and the hierarchical porous carrier is prepared by combining a microfluidic crushing technology and a supercritical drying technology. Finally, through an intelligent regeneration mechanism of bimetal coordination activation and high-frequency magnetic field triggering, the material is endowed with multiple stimulation response characteristics, high adsorption capacity and in-situ regeneration capacity, and the mechanical strength and the salt resistance are remarkably improved through a pearl-layer-like micro-nano laminated structure. The method is suitable for industrial wastewater advanced treatment and emergency pollution repair scenes.

The invention discloses a Tokamak plasma magnetic response model construction method, a Tokamak plasma magnetic response model construction system and a medium. Relates to the technical field of nuclear fusion plasma simulation. According to the scheme, improvement is carried out on the basis of the prior art, modeling is carried out on the magnetic response of the Tokamak plasma on the basis of basic data of the Tokamak plasma, and plasma behaviors are directly learned from experimental data; the simulator taking the plasma magnetic configuration evolution autoregression model as a carrier can process nonlinear terms and high-order terms, and is low in calculation cost, high in speed and capable of being applied in real time; according to the method, the behavior of the plasma under magnetic control can be well simulated, the plasma behavior is directly learned from experimental data without simplifying and assuming plasma properties, and the method can be used for off-line simulation and can also be used for control strategy optimization or fault detection in real time.

The invention relates to the technical field of environmental engineering, and discloses a wool washing wastewater recovery treatment process which comprises the following steps: S1, carrying out demulsification pretreatment on wastewater through bionic nano-enzyme and recovering wool fat, S2, carrying out supercritical water gasification reaction on the pretreated wastewater, synchronously decomposing organic matters and generating hydrogen, the method comprises the following steps: S1, gasifying effluent, S2, carrying out gasification on the effluent, S3, carrying out filtration and biodegradation on the gasified effluent by adopting a self-energy-supply dynamic membrane bioreactor, S4, carrying out deep purification on membrane effluent through a photocatalysis-microalgae coupling system, and S5, coordinating operation of the whole system through an intelligent control algorithm based on real-time monitoring data. According to the method disclosed by the invention, the technical effects of efficiently recovering the wool fat and improving the oil-water separation selectivity are achieved by adopting a technical scheme of synergistically enriching and demulsifying the magnetic response bionic nano-enzyme and the high-gradient magnetic field; the problems of high reaction residue, serious secondary pollution and easy enzyme inactivation are solved.

The invention discloses a tree-shaped heavy oil demulsifier with magnetic response as well as a preparation method and application thereof. The demulsifying agent comprises composite magnetic nano particles, the composite magnetic nano particles are provided with magnetic particle inner cores and polymers coated on the outer surfaces of the magnetic particle inner cores, the magnetic particle inner cores are modified superparamagnetic ferroferric oxide nano particles, and the polymers are alkyl phenolic resin polyoxyethylene polyoxypropylene ether. Rapid demulsification of the emulsion with the magnetic response effect at the low temperature is successfully achieved, the using amount of magnetic particles is small during demulsification, and the demulsification process is environmentally friendly, efficient and low in cost.

The invention provides an interventional operation magnetic control guide wire capable of repeating magnetic orientation. The interventional operation magnetic control guide wire comprises a core wire and a coating layer, the core wire is coated with the coating layer; the coating layer comprises magnetic composite particles and a first high-molecular polymer; the magnetic composite particles comprise magnetic powder and a low-temperature phase change material compounded on the surface of the magnetic powder. Compared with the prior art, the magnetic control guide wire provided by the invention can perform magnetic orientation after the guide wire is prepared, and magnetic field orientation does not need to be performed in the guide wire forming process, so that the guide wire preparation difficulty is simplified from the process; and meanwhile, magnetic orientation treatment can be carried out again according to requirements. The magnetic control guide wire is simple in production process, capable of achieving repeated magnetic orientation, excellent in magnetic response performance and operation flexibility and suitable for various minimally invasive surgeries and interventional therapy.

The application provides a hetero-composite wave-absorbing material based on attapulgite, a preparation method and application thereof. The wave-absorbing material is prepared by acid activation and high-frequency ultrasonic stirring to disperse attapulgite in a deionized water system to form an attapulgite emulsion, and the well-dispersed attapulgite fibers are uniformly coated with a carbon layer on the surface through hydrothermal stirring and high-temperature carbonization; then, a flower-like NiCo2O4 is grown in situ on the carbon-coated attapulgite to construct a hetero-interface, the carbon-coated attapulgite is used as a dielectric loss material, the flower-like NiCo2O4 is used as a magnetic loss material, through hetero-structure design, the carbon layer can inhibit the skin effect caused by the cross-linked flower-like NiCo2O4, so as to amplify the magnetic response behavior of the NiCo2O4; the hetero-interface formed between the two can significantly enhance the interface polarization, realize impedance matching, significantly improve the microwave absorption performance, and overcome the defects of impedance mismatch and structure design existing in the prior art magnetic-dielectric synergistic wave-absorbing material.