947 results about "Layered structure" patented technology

The invention provides a sensor for detecting local fault decomposition components of C4F7N and a preparation method of the sensor, and belongs to the technical field of gas sensing. The sensor comprises a gas sensitive material, a screening layer material and an interdigital electrode, the surface of the interdigital electrode is covered with the gas sensitive material, and the surface of the gas sensitive material is covered with the screening layer material. According to the invention, SnO2, Pd-SnO2 and MoS2-SnO2 are used as gas-sensitive materials, the surface of an interdigital electrode is covered with the gas-sensitive materials in a dispensing manner, and then the surface of the gas-sensitive materials is covered with a screening layer material Co3 (HITP) 2 in a silk-screen printing manner, so that a double-layer sensing structure is formed. The sensor with the double-layer structure can detect decomposed components C3F6, CO and CHF3 under strong interference of C4F7N background gas, the three gas-sensitive materials respectively have certain response selectivity to the three gases, and the lower detection limits are respectively 0.195 ppm, 3.12 ppm and 3.66 ppm; in addition, the sensing array with the double-layer structure has a certain qualitative and quantitative recognition capability on the mixed gas.

The invention relates to the technical field of packaging films, and particularly discloses a heat-resistant polyethylene composite packaging film and a preparation method thereof.The polyethylene composite packaging film comprises an inner layer, a middle layer and an outer layer, the inner layer is prepared from, by mass, 100 parts of linear low-density polyethylene, 28-32 parts of polypropylene and 8-10 parts of hydrotalcite modified blending materials, the middle layer comprises the following raw materials in parts by weight: 100 parts of low-density polyethylene, 40-60 parts of linear low-density polyethylene, 3-5 parts of a coupling agent and 0.5-1 part of an antioxidant, the outer layer comprises the following raw materials in parts by weight: 100 parts of modified PA6, 20-30 parts of metallocene polyethylene and 5-8 parts of a compatilizer, functional gradient distribution is realized by adopting layered extrusion of three-layer co-extrusion, and PA6 and polypropylene have a synergistic effect, so that the composite film has excellent heat resistance, and the service life of the composite film is prolonged. The hydrotalcite and the graphene oxide have a synergistic effect, the layered structure effectively obstructs oxygen and water vapor, and the obtained polyethylene composite packaging film is good in barrier property and has excellent mechanical property and heat resistance.

The invention relates to the field of super-hydrophobic materials, in particular to a basalt fiber composite material as well as a preparation method and application thereof. According to the composite fabric material provided by the invention, a multistage micro-nano rough surface of the MoS2 nanoflowers and the silver nanoparticles is constructed on the fiber substrate, so that not only is super-hydrophobic self-cleaning realized, but also the anti-icing performance is relatively high, and particularly, rapid heating is realized by combining broadband absorption of the MoS2 nanoflowers and a local surface plasma resonance effect of the silver nanoparticles; and meanwhile, the silver nanoparticles accelerate heat conduction, so that excellent ice melting capability is obtained. The high conductivity of the silver nanoparticles constructs a conductive path, and the layered structure of MoS2 triggers interface polarization, so that the electromagnetic shielding effectiveness of the X wave band is improved. The dual antibacterial mechanism of the MoS2 nanoflowers and the silver nanoparticles also realizes broad-spectrum efficient antibiosis, the preparation method is green and environment-friendly, the cost is low, and the requirements of complex scenes such as wearable electronic equipment, medical protection, polar region protection and national defense can be met.

The invention discloses a preparation method of a 3D printing multi-scale layered rigid-flexible impact-resistant composite material. The method comprises the following steps: designing a PLA skeleton with a multi-scale layered structure, and carrying out slicing processing to obtain an STL format file; the preparation method comprises the following steps: preparing a PLA framework through 3D printing, injecting a silicon elastomer serving as a soft material and a binder into a multi-stage layered structure of the framework, and curing to obtain the composite material. The composite material has a layered structure with three scales, the structure is realized by designing a patterned microstructure for each layer to induce a 3D printing path to stack layer by layer, and complex programming is not needed; the silicic acid gel in the gaps of each stage of layered structure is integrally formed, the composite material has the rigid-flexible coupling property, the hard PLA framework enables the composite material to have good mechanical properties, and the soft silicic acid gel provides larger deformation in the impact resisting process to achieve energy dissipation; tooth-shaped protruding interface structures which are embedded in a staggered mode are designed on the contact faces between the macroscopic layers, and the deflection direction of cracks is induced.

The invention relates to a heat-conducting MXene film with ultrahigh anisotropy and a preparation method of the heat-conducting MXene film. The ultrahigh-anisotropy heat-conducting MXene film is an MXene / MMT composite film and is formed by alternately stacking a plurality of MXene layers and a plurality of MMT layers. The MXene and MMT nanosheets in the alternating layered structure are highly and regularly oriented along the plane direction, so that excellent anisotropic heat-conducting property can be effectively realized. As a heat diffuser of a high-performance electronic device, the film has more excellent cooling efficiency than a traditional commercial heat-conducting film.

The invention provides a composite material additive manufacturing method and device based on size error compensation, and the method comprises the steps: selecting the number, type and combination mode of materials needed by each layered structure strip according to the material performance of a prepared component and the local thermodynamic performance and mechanical performance of the component; all strips of the single layered structure are laid at the same time or in each round, so that the single layered structure is formed; each strip is made of a single type of material or is formed by laminating and compounding a plurality of single type of materials, and the self-adaptive laying method is executed according to data of various sensors in the laying process and data of a detection mechanism after laying; and the steps are repeated, and the strips are laid layer by layer according to the layer sequence of the layered structure till the component is formed. According to the method, through effective combination of additive manufacturing modes of multiple fiber composite materials, multiple materials are combined and then laid, and it is ensured that the distribution of fibers and the infiltration effect of a matrix reach the ideal state.

The invention discloses a wearable medical monitoring equipment electrode which is composed of a layered structure and comprises a transparent flexible substrate layer which is made of a biocompatible flexible polymer material and is used for providing flexible support and isolating a metal electrode from the skin; the metal grid copper transparent electrode layer is formed on the surface of the transparent flexible substrate layer through a yellow light etching micro-nano processing technology; the conductive gel layer uniformly covers the surface of the metal grid copper electrode layer; the encapsulation layer is formed by spin-coating a polymethyl methacrylate solution on the surface of the conductive gel layer and forming a transparent protection layer after curing; the gradient line width bionic honeycomb-shaped copper grid design is adopted, the light transmittance is kept, meanwhile, the collection efficiency of physiological electric signals is remarkably improved, signal transmission loss is reduced, through the polyacrylamide and nanocellulose composite gel formula and micro-channel dynamic humidity adjustment, signal stability under long-term wearing is ensured, and the application range is wide. The problem of signal distortion caused by dryness of traditional gel is solved.

Panel suitable for assembling a floor covering by gluing a plurality of said panels onto a substrate, wherein the panel has a substantially planar top side, and a substantially planar bottom side, at least four substantially linear side edges comprising at least one pair of opposite side edges, the panel having a layered structure which comprises a decorative top layer, wherein the decorative top layer shows a dimensional sensitivity to temperature and / or humidity fluctuations, the panel further comprising a reinforcing layer, adhered to the top layer, and having a modulus of elasticity of at least 2 Mpa.

The invention relates to the technical field of data simulation processing, in particular to a thermal simulation method and system for a circuit board and a medium. The method comprises the following steps: acquiring circuit board layer data; extracting board layer material thermal resistance parameters of the circuit board layer data, wherein the board layer material thermal resistance parameters comprise copper foil thermal resistance parameters and insulating medium thermal resistance parameters; identifying the layered structure of the circuit board layer data, and recording as layered structure data; component layout characteristics are determined according to the layered structure data, interlayer thermal resistance distribution calculation is carried out on the board layer material thermal resistance parameters based on the component layout characteristics, and layered structure thermal resistance distribution data are generated. Through a data processing technology and an analogue simulation technology, heat transfer interaction analysis is carried out on the copper foil layer and the insulating medium layer of the circuit board, and the heat transfer direction and the heat accumulation effect of the circuit board are evaluated so as to construct a heat simulation model of the circuit board.

A computer-implemented method and apparatus for managing physical and digital products' customization using container format are disclosed. In some embodiments, the method comprises receiving a container file with serialized objects, deserializing these objects to form a hierarchical object structure, and interacting with a database to obtain real-time configuration data. Custom attributes of the products are defined by binding attribute / value pairs to the hierarchical structure. A visualization of the customized product is generated based on these pairs, and manufacturing instructions are determined considering the attribute / value pairs and manufacturing constraints. The apparatus comprises a memory and a processor to execute instructions for deserializing the container file, retrieving configuration data, organizing objects into a hierarchical tree, negotiating product customizations, and outputting manufacturing data. This system enables efficient and accurate production of customized products by managing data, rendering graphics, and incorporating manufacturing constraints.

According to the caisson wharf and the construction method thereof, a layered structure of a steel slag-rubber particle composite lower layer and a regenerated resin-basalt fiber composite upper layer is adopted for a base, and interface bonding is enhanced in combination with a silane coupling agent; the foundation bed is assembled by precast concrete modules and is poured by nano mortar; the caisson main body is provided with a positioning plate which is inserted into the guide groove, the caisson main body is filled with multi-graded steel slag fragments, and an independent airbag cavity is pre-buried in a bottom plate; the buoyancy control system dynamically adjusts the water injection rate based on multi-sensor data; the ecological permeable pipeline network adopts a diatomite-zeolite coating; the prestressed steel strand towing system is regulated and controlled in real time through the friction damper. The caisson wharf and the construction method thereof have the remarkable advantages in the aspects of structural stability, ecological friendliness, construction efficiency, intelligence and automation, the problems existing in a traditional caisson wharf can be effectively solved, and the requirements of modern port construction are met.

The invention discloses a layered structure metal composite material based on a liquid phase separation phenomenon and a preparation method thereof, and the preparation method comprises the following steps: step 1, weighing raw materials which comprise at least two kinds of metal which is difficult to mix and melt; 2, the temperature of the metal material in the step 1 is increased to be above the liquidus of the metal material, and a mixture with uniform components is obtained; (3) cooling the mixture smelted in the step (2) to a liquid-phase non-mixed-melting temperature interval until the mixture is completely separated; and 4, the required metal composite material with the layered structure can be obtained after cooling. According to the invention, a method of continuous liquid phase separation and melt solidification along with a furnace is adopted, and the preparation of the layered composite material is realized by regulating and controlling alloy elements and process parameters; the preparation method is easy to operate, low in cost and high in efficiency, a metallurgical bonding interface can be obtained, and the problem that the bonding strength of a dissimilar material composite interface is low is solved.

The invention belongs to the technical field of metal-based composite material preparation, and particularly relates to a method for treating a high-volume-fraction particle reinforced aluminum-based surface through friction stir. In order to solve the problems of particle aggregation, uneven distribution and the like in the preparation process of a high-volume-fraction particle reinforced aluminum-based composite material in the prior art, the invention innovatively introduces a method for mixing and adding solid lubricating particles with two-dimensional layered structures and hard particles. According to the method, the interface regulation and control effect of the two-dimensional layered particles is used in cooperation with the special stirring head, uniform distribution of the hard particles in the composite layer is effectively promoted, the hole defect caused by particle aggregation is remarkably reduced, and controllable preparation of the high-volume-fraction particle reinforced aluminum matrix composite is achieved. And subsequent solid solution and aging heat treatment are combined, so that the comprehensive mechanical property and wear resistance of the material are further improved. The method is simple in process and easy to implement, and has good engineering application value.

The invention discloses a strong isolation abnormal data analysis method, system and device and a storage medium, and is applied to the field of computer security, and the method comprises the steps: obtaining the original behavior data of a strong isolation boundary through an acquisition end deployed by a bypass; analyzing the original behavior data to obtain effective behavior data; performing double layering on the effective behavior data in a multi-dimensional analysis mode to obtain structured data; performing spatial vector hybrid dimension packaging on the layered structured data to obtain standardized packaging data; and sending the standardized packaged data to a server for data exception analysis. According to the method, all behavior data passing through the strong isolation boundary can be comprehensively acquired, the problem of security threat omission caused by incomplete data monitoring in the prior art is effectively avoided, the integrity and accuracy of data monitoring are ensured, and potential security threats can be accurately identified.

The invention relates to the technical field of composite materials, in particular to a high-strength epoxy resin composite material and a preparation method thereof, and the high-strength epoxy resin composite material comprises the following raw materials in parts by weight: 50-80 parts of a base material, 10-20 parts of a curing agent, 5-10 parts of modified carbon nanotubes, 3-10 parts of a reinforcing sheet, 3-6 parts of a reinforcing material and 1-3 parts of a flame retardant. In the preparation method, the modified carbon nanotubes are in chemical bond connection with the base material through surface modification, the interface bonding force is enhanced, stress is effectively transmitted, the unique layered structure and surface modification treatment of the enhanced sheet are enhanced, the enhanced sheet is firmly combined with the resin matrix, and a three-dimensional enhanced network is formed through the synergistic effect of mechanical interlocking and stress dispersion. The vermiculite sheet layer prevents crack propagation, and the modified carbon nanotubes and the reinforcing material effectively transfer stress, so that the tensile strength and bending strength of the composite material are greatly improved, and the high-strength application requirement is met.

The invention discloses a triboelectric pressure sensor with a gradient layered structure. The triboelectric pressure sensor comprises a conductive shielding layer I (1), an insulating layer I (2), an electrode layer I (3), a friction layer, an electrode layer II (5), an insulating layer II (6) and a conductive shielding layer II (7) which are stacked in sequence, the gradient layered structure design is provided, the linear range is expanded through layered and staged response pressure, the shielding layer is integrated to suppress interference, materials and the process are optimized, and stability and manufacturability are improved.

The invention relates to an industrial park-based comprehensive energy flow direction on-line monitoring system and method, and the system comprises an energy modeling module which is used for representing instrument information, carrying out the modeling of collection labels and collection frequencies of different types of instruments, constructing nodes of different energy layered structures, carrying out the modeling of a directed flow direction relation between the nodes, and carrying out the modeling of the directed flow direction relation between the nodes; binding the logic relationship between the node and the instrument; the data acquisition module is used for performing data acquisition through an instrument, performing edge processing and encrypted transmission through communication equipment, and storing the data in a database; the energy monitoring module is used for monitoring and counting the state of the instrument and monitoring the energy flow direction of the enterprise in real time according to the directed flow direction of the node; and the statistical analysis module is used for providing energy balance analysis for different links of the enterprise energy in the conversion and use process according to the nodes, evaluating the energy consumption loss degrees of the different links, visualizing the nodes with abnormal loss and giving an alarm. Through the real-time and accurate calculation of the energy loss among the nodes at all levels, the backtracking of the nodes with abnormal loss and the timely pushing of the alarm information, the enterprise can timely discover the problems occurring in the energy supply, and can quickly find out the corresponding solution, reduce the energy consumption loss and guarantee the robustness of the energy flow network.

A flexible display device example includes a display panel including an active area, a non-active area, and a bending area and having one edge that is bent in a rear direction to have a predetermined curvature, first and second back plates disposed on a rear surface of the display panel, a metal plate disposed on a rear surface of the first back plate and an adhesive member disposed between the metal plate and the second back plate, and including a support layer, a first adhesive layer and a third adhesive layer disposed on an upper portion of the support layer, and a second adhesive layer disposed on a lower portion of the support layer, wherein the third adhesive layer may include a conductive material and may have conductivity. Thus, fixing force of a bending portion may increase, thereby preventing cracks in the bending portion that may occur during drop evaluation.

The invention relates to the technical field of comprehensive energy management, and discloses an energy storage coordinated regulation and control method and device, and the method comprises the steps: determining an operation mode of an energy storage station, and packaging the operation mode of the energy storage station as an option; on the basis of the options and the semi-Markov model, constructing a semi-Markov model integrated with the options; and constructing a layered option evaluation model based on the semi-Markov model of the fused options, and solving an optimal energy storage coordinated regulation and control scheme corresponding to the operation mode of the energy storage station in the multivariate application scene based on the layered option evaluation model. According to the method, the station operation mode is packaged in the options, the algorithm solving efficiency is improved, in addition, the parameter quantity and the calculation cost are reduced by adopting the model of the layered structure, and coordinated regulation and control of energy storage under multiple application scenes are achieved in a short time.

The invention discloses a modal fusion intelligent video abnormal behavior monitoring method, and relates to the technical field of intelligent security monitoring, and the method comprises the following steps: collecting video modal data through a video camera, collecting sound modal data through an audio sensor, and obtaining environment state modal data through an environment state sensor; denoising processing is carried out on video data, noise reduction and filtering operation is carried out on sound data, and normalization processing is carried out on environment state data, so that the data availability is improved. By constructing an abnormal behavior analysis model and adopting a unique layered structure, compared with a traditional simple model, the complex incidence relation between multi-modal data can be effectively processed, and in a scene where personnel gather and are accompanied with noisy sound, the model can integrate personnel actions and postures in a video and sound features in an audio frequency, so that the model can be used for analyzing the abnormal behavior. Whether abnormal behaviors such as noisy and fighting occur or not is accurately judged, the accuracy of abnormal behavior judgment is greatly improved, and the misjudgment rate and the missed judgment rate are reduced.

The invention discloses an interface enhancement gradient design method of an anti-impact aviation glass laminated structure, and relates to the technical field of composite material design, the method comprises the steps of glass material preparation, interface enhancement gradient design, lamination compounding, quality detection and performance testing, the glass material comprises a glass layer material, a middle layer material and a transition layer material, the laminated composite process comprises the steps of pre-strain treatment, pre-pressing treatment, hot-pressing combination and cooling demolding, and has the advantages that by arranging the transition layers with components and performance in gradient change, the content of reinforcing materials such as nanometer titanium dioxide particles and graphene nanosheets in each transition layer is gradually increased; and compared with a traditional uniform or simple layered structure, the gradient design has the advantage that the phenomenon of interface stress concentration caused by performance difference between the glass layer and the polymer intermediate layer is remarkably reduced.

The present disclosure relates to methods and apparatuses for decoding data for (still or video processing into a bitstream). Two or more sets of segmentation information elements are obtained from the bitstream. Then, each of the two or more sets of segmentation information elements are inputted respectively into two or more segmentation information processing layers out of a plurality of cascaded layers. In each of the two or more segmentation information processing layers, the respective sets of segmentation information are processed. The decoded data for picture or video processing are obtained based on the segmentation information processed by the plurality of cascaded layers. Accordingly, the data may be decoded from the bitstream in an efficient manner in the layered structure.

The invention relates to the technical field of neodymium-iron-boron magnetic materials, in particular to a preparation method of a large-size high-performance sintered neodymium-iron-boron magnet. According to the method, a blank of a layered structure is prepared by stacking magnetic powder with different components in a profiling stage, first grain boundary diffusion is accompanied in the sintering process, and then the large-size high-performance sintered neodymium-iron-boron magnet is prepared through traditional grain boundary diffusion (second time). The first grain boundary diffusion involved in the method is generated in the liquid phase sintering densification process, and concentration gradient diffusion is carried out along the grain boundary after a diffusion source is liquefied; and the second grain boundary diffusion is the concentration gradient diffusion of the heavy rare earth on the surface of the compact magnet towards the interior of the magnet. In a large-size magnet, the layered structure design is matched with the twice grain boundary diffusion technology, and the defect of insufficient depth in the traditional grain boundary diffusion technology can be overcome.

The invention discloses a tunnel blasting vibration prediction method suitable for a sand shale interbed area, and mainly relates to the technical field of tunnel blasting. Comprising the following steps: S1, determining key factors influencing the vibration velocity; s2, building a blasting vibration prediction model in the sand shale interbed area; s3, carrying out data normalization processing; s4, introducing a BP neural network to train the prediction model; s5, introducing a particle swarm optimization algorithm and initializing related parameters of a particle swarm; s6, improving a particle swarm optimization algorithm; s7, a sand shale interbed tunnel blasting vibration prediction model of the improved particle swarm optimization BP neural network is obtained, the model is combined with blasting characteristic parameters of specific sand shale interbed area tunnel engineering for prediction, and a blasting effect prediction result is obtained; according to the method, important theoretical guidance can be provided for blasting vibration prediction of the stratified structure with changeable rock strata, and a practical safety evaluation tool is provided for ground surface vibration velocity control of similar projects.

The invention relates to the technical field of heat-resistant materials, in particular to a heat-resistant polyethylene material and a preparation method thereof, and the heat-resistant polyethylene material comprises the following raw materials: ultra-high molecular weight polyethylene, zirconium oxide-zinc aluminate spinel (ZrO2-ZnAl2O4), modified graphdiyne, an antioxidant, a heat stabilizer, a plasticizer, a flame retardant and an anti-ultraviolet agent. The ultrahigh molecular weight polyethylene, the ZrO2-ZnAl2O4 and the modified graphdiyne play a role through a synergistic effect, a polyethylene molecular chain forms a firm three-dimensional network structure in a high-temperature radiation process, and a stable matrix supporting effect is provided; the excellent chemical stability and oxidation resistance of ZrO2-ZnAl2O4 in a high-temperature environment effectively inhibit the thermal degradation reaction of polyethylene, the service life of the material is prolonged, the modified graphdiyne is beneficial to rapid heat transmission, the thermal stability of the material is improved, meanwhile, the layered structure of the material has good lubricating performance, and the service life of the material is prolonged. The modified graphdiyne and the ZrO2-ZnAl2O4 are combined to avoid heat accumulation and material aging caused by the friction effect, and the ultrahigh molecular weight crosslinked polyethylene, the ZrO2-ZnAl2O4 and the modified graphdiyne form a multi-layer protection system to jointly improve the heat stability of the material.

A positive electrode material, a preparation method therefor and a use thereof. The positive electrode material comprises a core and a first shell layer, a lattice in a near-surface region of the core having a layered structure is doped with at least one of Co, Ti and Zr, and the first shell layer comprises a material capable of improving the ionic conductivity of the positive electrode material, or a material capable of improving ionic conductivity and electronic conductivity.

The invention relates to a wear-resistant high-strength glass protection safety film and a preparation method thereof, and belongs to the technical field of safety films. The silicon carbide whisker, the modified nano titanium dioxide and the graphene oxide are jointly prepared into the composite filler, and the strength and the wear resistance of the film are remarkably improved by utilizing the three-dimensional network structure of the silicon carbide whisker, the efficient filling and reinforcing effects of the nano titanium dioxide and the layered structure reinforcement of the graphene oxide; the permeation of small molecular substances such as moisture and oxygen is effectively blocked, and the barrier property of the membrane is improved. Meanwhile, the silane coupling agent is added, so that the compatibility and dispersity of the composite filler and the water-based resin emulsion are improved. The surface of the membrane is modified by heptadecafluorodecyl trichlorosilane, the hydrophobic performance of the membrane is remarkably enhanced, water vapor condensation and dust and dirt accumulation are reduced, meanwhile, the durability of the membrane is improved, and the wear resistance of the membrane is enhanced through chemical bonding.

The invention discloses an anti-fingerprint scratch-resistant ink coating heat transfer printing process, which comprises the following steps of: heating and melting modified ink, coating the modified ink on transfer printing paper, drying, engraving a design pattern by using laser, adhering the transfer printing paper and a transfer printing base material, carrying out hot-pressing transfer printing, and irradiating by using ultraviolet light to finish ink heat transfer printing. The modified ink is prepared from the following raw materials in parts by weight: 20-30 parts of modified resin, 20-25 parts of flax wax, 15-20 parts of beewax, 15-20 parts of castor oil, 8-10 parts of a reinforcing additive, 3-5 parts of modified filler, 1-1.5 parts of KH570, 0.5-1 part of benzoin diethyl ether and 15-20 parts of pigment, and the raw materials are subjected to double-bond polymerization in the raw material mixing and illumination process, so that the cross-linking curing sites of the ink are increased; through cooperation with a layered structure of a modified filler base material graphene, the scratch resistance of the ink is improved, and meanwhile, the reinforcing additive contains flurane, long-chain alkyl and polysiloxane chain segments, so that residues of fingerprints on the surface of the ink can be reduced.

The invention relates to the technical field of wave-absorbing materials, and particularly discloses a Zn-Fe-Mn oxide-hard carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: preparing pomegranate-shaped spheres through a coprecipitation-calcination method; then, uniformly dispersing the mixture in a self-made solvent composition, and curing and molding the mixture through heating treatment; and finally, carrying out annealing treatment in a high-temperature tube furnace at the temperature of 800 DEG C in an argon protective atmosphere (the flow rate is 100 sccm), so as to prepare the Zn-Fe-Mn oxide-hard carbon composite material. The composite material has a unique three-dimensional layered structure, shows excellent broadband microwave absorption characteristics, and can realize efficient electromagnetic wave attenuation. And a new way is opened up for structural design and optimization of the high-performance wave-absorbing material, and the wave-absorbing material has a wide application prospect in the application fields of advanced stealth technology and novel electromagnetic shielding.

The invention discloses a Transform-based digital textbook automatic hierarchical design method. The method comprises the steps of obtaining digital textbook content, performing structured analysis, dividing the digital textbook content into a plurality of content units, and allocating a unique identifier; an improved Transform model is input, semantic modeling is executed, the cognitive hierarchy is controlled, and folding representation is generated; based on the folded semantic representation, initial layering is executed, a layered structure is constructed, and a sequence and hierarchical relationship is generated; constructing a self-evolution hierarchical decision maker, detecting conflicts in a hierarchical structure, and identifying a hierarchical inconsistent relationship; re-executing hierarchical processing based on the conflict relation updating rule to generate an updated hierarchical structure; and performing disturbance processing on the textbook structure, repeating modeling and layering processes, and verifying a hierarchical stability result. According to the method, the stable and automatic hierarchical design of the digital textbook is realized by improving Transform semantic modeling and self-evolution hierarchical decision.