152results about How to "Improve self-healing ability" patented technology

The invention discloses a robot reinforcement learning control method and system based on a gating circulation unit, and relates to the technical field of artificial intelligence. Based on a reinforcement learning state machine, a trained student network is deployed to a real quadruped robot in a zero mapping manner, and movement control of the quadruped robot is realized; the training process of the student network is as follows: building a simulation training terrain environment of the robot, and setting different levels of terrain difficulty for each terrain; based on the distillation learning thought, establishing a teacher network and a student network based on a gating circulation unit, constructing a total loss function, and based on the constructed total loss function, fitting a motor joint angle output by the teacher network through an omnibearing simulation training terrain environment, a large-scale parallel training method and the student network; according to the robot reinforcement learning control method and system, robust motion of the robot in an unstructured terrain is realized, and the robot reinforcement learning control method and system have good anti-interference capability and self-recovery capability for a dynamic environment in which traditional control cannot be competent.

The invention relates to the technical field of power system fault monitoring, in particular to a power system fault monitoring and active control system and method.The method includes the steps that a three-dimensional model of a power distribution network in a target area is constructed, the power distribution network is divided in a refined mode, power parameters of all segments are analyzed in real time, and the operation fluctuation value of the power distribution network is calculated; the method comprises the following steps: determining whether abnormity exists or not, identifying and determining an abnormal segment when the abnormity of the power distribution network is detected, then analyzing the influence degree of the abnormal segment and carrying out grade division to evaluate the potential threat of the fault to the power distribution network, automatically matching a corresponding fault processing channel according to the grade of the influence degree of the abnormal segment, and executing corresponding control measures. Therefore, the fault source can be accurately identified, the control strategy is actively adjusted according to the actual influence condition of the fault, the influence of the fault on the power system is effectively reduced, and the stability and reliability of the system are improved.

The invention discloses a UV photocureable coating as well as a preparation method and application thereof in automobiles, and relates to the technical field of coatings. When the UV photocureable coating is prepared, 4-aminophenylboronic acid is dehydrated to prepare aminated boron oxygen six-ring; carrying out a reaction on the aminated boroxane and diallyl chlorophosphate to prepare functionalized boroxane; the preparation method comprises the following steps: sequentially reacting graphene oxide with 3-chloropropyltriethoxysilane and 1, 3-diallyl-1, 3, 5-triazine-2, 4, 6-triketone, so as to obtain modified graphene; the preparation method comprises the following steps: reacting epoxy resin with 2-butenal thiosemicarbazone to prepare modified epoxy resin; and uniformly mixing the modified epoxy resin, the epoxy acrylate resin, the modified graphene, the functionalized boroxane, the 1, 6-hexanediol diacrylate and the 1-hydroxycyclohexyl phenyl ketone, so as to obtain the UV photocureable coating. The UV photocureable coating prepared by the invention has excellent flame retardant, self-repairing and mechanical properties.

The invention provides a self-adaptive safety self-healing system based on artificial intelligence, and aims to improve the safety protection capability and the self-repairing capability of an information system. The system comprises a client Agent module, a secure transmission module, a data analysis and anomaly detection module, a self-healing strategy management module, an execution module and a monitoring display module. The client Agent module collects data such as system logs, network flow and resource use, and predicts resource changes through a long short-term memory (LSTM) network model. And the secure transmission module adopts a TLS protocol and a block chain technology to ensure the integrity and security of the data. And the data analysis and anomaly detection module identifies threat behaviors through an Isolation Forest algorithm and a deep learning technology, and automatically generates a security event report. And the self-healing strategy management module generates a self-adaptive repair scheme based on an AI analysis result, and the system realizes efficient anomaly detection and self-healing repair through intelligent analysis and self-adaptive adjustment, and is suitable for dynamic security protection in a complex network environment.

The invention belongs to the technical field of paint coatings, and particularly relates to a hydrophobic heat-conducting self-repairing coating and a preparation method thereof. The preparation method of the hydrophobic heat-conducting self-repairing coating comprises the following steps: ultrasonically dispersing a heat-conducting filler and polyethylene glycol in an organic solvent, dropwise adding into a water-borne epoxy resin solution, and stirring to obtain a heat-conducting coating solution; the method comprises the following steps: dropwise adding a liquid A containing polysiloxane and a fluorine-containing monomer into a liquid B containing polyethylene glycol, stirring, carrying out centrifugal suction filtration, and drying to obtain the self-repairing microcapsule. Then adding the self-repairing microcapsules and silicon dioxide into the fluorine-containing polymer solution and / or the hydrophobic resin solution, and carrying out ultrasonic dispersion to prepare a self-repairing hydrophobic coating solution; the heat-conducting coating liquid and the self-repairing hydrophobic coating liquid are uniformly sprayed or spin-coated on the surface of a metal base material in sequence and then are subjected to UV curing, and the hydrophobic heat-conducting self-repairing coating is prepared. According to the method, the process and raw materials are simple, and the prepared coating has heat conduction and self-repairing performance and is excellent in anti-aging performance.

The invention belongs to the technical field of water resource planning and management, and particularly relates to a method for calculating an effective hydrological connectivity strength index range of a wetland based on an InSAR (Interferometric Synthetic Aperture Radar) technology. The calculation method comprises the following steps: acquiring image data of an area to be calculated; identifying all wetland plaques in the water body area; dividing the wetland plaques into different effective hydrological communication type groups; calculating an elastic force value of each wetland patch; constructing a water level fluctuation-ecological elastic force curve under different effective hydrological communication situations, carrying out segmented fitting on the water level fluctuation to generate a fitting line, calculating the mean value of the elastic force of the wetland plaques under the effective hydrological communication type, generating an elastic force mean value line, and calculating the elastic force mean value line; the two intersection points of the elastic force mean value line and the fitting line are the effective hydrological connection strength index range. According to the method, the wetland plaques of different effective hydrological connection type groups are divided according to the difference of the effective hydrological connection strength, the optimal ecosystem elastic force of the wetland plaques is calculated respectively, and then the effective hydrological connection strength index range is determined.

The invention relates to the technical field of power distribution network protection, and provides a power distribution network override trip protection method based on a distributed network. S1, arranging multiple layers of intelligent distributed protection devices at different nodes of the power distribution network, wherein each layer of protection device has different fault detection and protection decision capabilities; and S2, realizing localized data processing and fault detection through the edge calculation unit of each protection device, wherein the fault detection carries out real-time fault identification based on a deep learning model. According to the arrangement scheme of the multi-layer intelligent distributed protection device, the protection device is divided into a high-voltage layer, a medium-voltage layer and a low-voltage layer according to the voltage grade and the load importance, the technical effects of step-by-step fault isolation and layered protection are achieved, and compared with the arrangement mode of a unified protection device in the prior art, the protection device has the advantages of being simple in structure and convenient to use. The problem of large-range override tripping is effectively solved, layered response of different levels of protection devices to faults is realized, the fault influence range is further controlled, and the stability of the system is improved.

The invention discloses a soil structure improver containing a compound microbial agent and a preparation method of the soil structure improver. The soil structure improver containing the compound microbial agent is prepared from the following raw materials in percentage by mass: humic acid, the compound microbial agent, vermiculite powder, a seaweed extract, diatomite, polydextrose, pectin, monopotassium phosphate, an organic zinc chelate, a medium trace element supplement and bentonite, wherein the humic acid, the compound microbial agent, the vermiculite powder, the seaweed extract, the diatomite, the polydextrose, the pectin, the monopotassium phosphate, the organic zinc chelate, the medium trace element supplement and the bentonite are matched. According to the soil structure improver disclosed by the invention, through the synergistic effect of the compound microbial agent, the proportion of a soil aggregate structure is effectively increased, the stability and the anti-scouring capability of soil are enhanced, the air permeability and the water-retaining property of the soil are improved, an ideal environment is created for the growth of crop roots, and the microbial agent can be colonized in the soil, so that the soil structure is improved. A good microbial community structure is formed, the biological diversity of the soil is enhanced, the self-repairing capability of the soil is improved, and a healthy soil ecological system can be constructed.

The invention relates to the technical field of rubber additives, in particular to a cross-linking agent for rubber and a preparation method. The cross-linking agent for rubber is prepared from the following raw materials in parts by mass: 5 to 10 parts of polystyrene microspheres, 1 to 5 parts of tetramethyl orthosilicate, 0.1 to 0.5 part of copper sulfate, 1 to 2 parts of a surfactant, 1 to 2 parts of vinyl trimethoxy silane, 0.01 to 0.1 part of an initiator, 2 to 6 parts of vinyl acetate, 1 to 2 parts of cobalt acetate, 0.01 to 0.1 part of yttrium chloride and 1 to 2 parts of graphene oxide. Transition metal salt and rare earth are compounded and loaded on the surface of grafted silicon dioxide, the specific surface area of the metal salt can be effectively increased, the coordination efficiency is improved, the adding amount of the metal salt is reduced, meanwhile, self-repairing of crosslinking and reinforcing functions can be effectively achieved, and the crosslinking agent is high in stability and has higher environmental tolerance.

The invention provides a rapid photoresponse liquid crystal elastomer actuator and a preparation method thereof, and belongs to a liquid crystal elastomer actuator in the technical field of high polymer materials. The liquid crystal elastomer actuator is a uniformly-oriented single-domain high-entropy alloy liquid crystal polymer, and is obtained by longitudinally and uniformly stretching a multi-domain high-entropy alloy liquid crystal polymer and then initiating photopolymerization by ultraviolet light; the multi-domain high-entropy alloy liquid crystal polymer contains dispersed high-entropy alloy and is obtained by cross-linking liquid crystal monomers; the fast photoresponse liquid crystal elastomer actuator is of a hollow radial symmetrical structure. The quick light response liquid crystal elastomer actuator has a full-solar spectrum absorption response function, has excellent plasticity and self-recovery performance, is simple and convenient in manufacturing process, integrates sensing, driving and built-in feedback loops, has high light tracking precision and self-adaptive phototropism, and can be used in the field of light tracking. And a brand new technical approach is provided for research and development of the intelligent soft robot.

The invention relates to a self-repairing invisible car cover and a preparation method thereof, and relates to the technical field of automobile material processing, and the self-repairing invisible car cover comprises the following components in parts by mass: 20-40 parts of fluorine-containing polyol, 15-30 parts of polyisocyanate, 5-10 parts of a composite chain extender, 10-20 parts of self-repairing microcapsules, 1-3 parts of an initiator and 30-50 parts of a solvent. The preparation method comprises the following steps: preparing a self-repairing coating; coating the surface of the transparent substrate with an adhesive to obtain an adhesive layer, and covering the adhesive layer with a release film to obtain a semi-finished automobile cover; and the self-repairing coating is applied to the face, away from the release film, of the semi-finished automobile cover, heating and curing are conducted, the semi-finished automobile cover with a self-repairing coating is obtained, the self-repairing coating is coated with a protective film, and the self-repairing invisible automobile cover is obtained after curing. The automobile cover has the effect of improving the self-repairing performance of the automobile cover, and the automobile cover has good weather resistance, tensile resistance and puncture resistance.

The invention relates to a transponder autonomous reset method suitable for a micro-nano satellite. The method specifically comprises the following steps: S1, setting a timer in a transponder; s2, the timer starts timing from 0, and the reading per second is increased by 1; s3, according to the fact that timing of the timer reaches a reset timing threshold value, the responder conducts continuous interpretation of the locking state within the locking interpretation time; s4, judging that the number of times of continuous locking abnormal states reaches a reset locking interpretation threshold value, if so, automatically resetting the responder, otherwise, not resetting; and S5, resetting the timer, and executing the step S2. The method can be applied to responders with different measurement and control systems and frequency bands; under the condition that the normal measurement and control service of the micro-nano satellite is not influenced, the autonomous recovery capability of the responder in a single-particle fault state is enhanced, and the intervention frequency of a ground measurement and control station is reduced.

The invention relates to the technical field of concrete compacting agents, and provides an internal doping type self-repairing concrete compacting agent which comprises the following components in parts by weight: 10-15 parts of a water-soluble polymer, 12-18 parts of an expanding agent, 1-3 parts of a shrinkage reducing agent, 2-8 parts of organic fibers, 10-15 parts of a modifier and 30-50 parts of a diluent, the modifier comprises bauxite, diatomite and forsterite powder in a mass ratio of 1: 1: 8-8: 1: 1. According to the technical scheme, the problem that the concrete compacting agent in the related technology is poor in improvement of the anti-permeability performance of concrete is solved.

The invention provides pervious concrete prepared from modified recycled aggregate and a nano-reinforced material, and relates to the technical field of building materials, the pervious concrete comprises recycled aggregate, a nano-reinforced material, a cement matrix, a water reducing agent, a surfactant and water, the recycled aggregate comprises waste concrete, tile waste, ceramic fragments and glass waste, and the nano-reinforced material comprises a water reducing agent, a surfactant and water. The modified recycled aggregate and the nanometer reinforcing material are adopted, particularly, after the surface of the recycled aggregate is subjected to acid etching and plasma treatment, the surface of the recycled aggregate is subjected to acid etching and plasma treatment, and the surface of the nanometer reinforcing material is subjected to acid etching and plasma treatment, so that the surface of the recycled aggregate is subjected to acid etching and plasma treatment, and the surface of the recycled aggregate is subjected to acid etching and plasma treatment; the bonding performance with a cement matrix is enhanced, and the mechanical property of the pervious concrete is remarkably improved. The modification treatment ensures that the pervious concrete can meet higher performance requirements in high-strength application scenes (such as heavy traffic roads).

The invention discloses a process for repairing damaged soil ecology by lincomycin waste liquid fertilizer, and relates to the technical field of soil remediation, which comprises the following specific steps: step 1, screening and culturing microbial decomposition flora, the invention has the following advantages: through the chelation of the polyaspartic acid derivative on metal ions and the promotion effect on nutrient absorption, the release and transmission of nutrients are precisely regulated and controlled, so that crops can absorb and utilize the nutrients more efficiently; the nano composite material and the specific biological stimulant containing various beneficial microbial strains and natural plant extracts are jointly fused into the liquid fertilizer, the microbial strains in the specific biological stimulant activate the soil biological environment, the natural plant extracts assist plant growth to resist diseases, and the nano composite material and the natural plant extracts have a synergistic effect, so that the liquid fertilizer has a good application prospect. Physicochemical properties and biological activity of soil are optimized, excellent soil micro-ecology is created for plant growth, healthy and strong growth of plants is promoted, and restoration of damaged soil is enhanced.

The invention discloses a preparation method of a passivator for a high-rust-prevention aluminum alloy, and belongs to the technical field of rust-prevention materials.The passivator comprises a self-repairing nanocapsule, an environment-friendly corrosion inhibitor, a functional silane coupling agent, inorganic anti-corrosion pigment and an assistant.The self-repairing nanocapsule can form a passivation film with a self-repairing function on the surface of the aluminum alloy, and the passivation film can be applied to the surface of the aluminum alloy; the environment-friendly corrosion inhibitor provides anti-rust performance and biocompatibility, the functional silane coupling agent enhances the adhesive force and weather resistance of a passivation film, the inorganic anti-corrosion pigment serves as a main component of the passivation film to provide excellent anti-corrosion performance, and the passivation agent is applied to the surface of an aluminum alloy in a dipping, spraying, brushing or electrochemical deposition mode. According to the passivating agent, the self-repairing nanocapsule is added to form a layer of passivating film with a self-repairing function and excellent anti-rust performance, the anti-rust performance and durability of the aluminum alloy are remarkably improved through the passivating agent, and the performance is gradually enhanced along with increase of the content of the self-repairing nanocapsule.

The invention relates to the field of mobile data communication services, in particular to a subway rail transit underground space emergency communication system and an arrangement method thereof. The subway rail transit underground space emergency communication system provided by the invention comprises a first communication link used for transmitting service data in a first state; the second communication link is used for transmitting service data in a second state; the communication link monitoring module is in signal connection with the first communication link and is used for monitoring the signal-to-noise ratio of data transmission in the first communication link; and the communication link switching module is in signal connection with the communication link monitoring module, is respectively in signal connection with the first communication link and the second communication link, and is used for switching the data transmission path from the first communication link to the second communication link according to the signal-to-noise ratio of data transmission in the first communication link. According to the invention, through double-link redundancy and rapid switching, automatic switching to a standby link is realized under abnormal conditions such as optical fiber faults or power interruption, and continuous and uninterrupted communication is ensured.

The invention relates to an ion type rare earth ore tailing sandy land soil improvement structure and an improvement method, and belongs to the technical field of ecological restoration. The ion type rare earth ore tailing sandy land soil improvement structure sequentially comprises a humus layer, a surface soil layer and a subsoil layer. The subsoil layer comprises rare earth ore tailing sandy land soil and a slow-release modifier; the surface soil layer comprises the rare earth ore tailing sandy land soil, a slow-release modifier and a quick-acting modifier; the slow-release improver comprises agricultural and forestry wastes, and the quick-acting improver comprises livestock and poultry manure, lime and a compound fertilizer. According to ecological function characteristics of the soil, aiming at physical characteristics and nutrient content of the soil and specific rare earth and aluminum toxicity pollution of a mining area, the soil layer is remolded by using different dosages and different types of improvers, so that the restoration of a local damaged soil ecological system is accelerated, and the ecological function restoration of the soil in the rare earth ore tailing sand land is realized.

The invention discloses an optimized operation method for a hydrogen refueling station to participate in a day-ahead market and a balance market. The method comprises the following steps: constructing an upper-layer hydrogen refueling station bidding quotation model; a lower-layer day-ahead market clearing model composed of an electric energy market, a standby market and a hydrogen energy market is established; establishing a lower-layer balance market clearing model based on the bidding quotation of each subject and the reserve capacity provided by each subject of the lower-layer day-ahead market clearing model; constructing a lower-layer overall clearing model based on the middle-lower-layer day-ahead market clearing model and the middle-lower-layer balanced market clearing model; converting the lower-layer overall clearing model into a group of constraint conditions by using a KKT condition, adding the constraint conditions into an upper-layer hydrogen refueling station bidding quotation model, and converting the upper-layer model and the lower-layer model into a single-layer model; and respectively linearizing nonlinear terms of the single-layer model through a strong dual theorem and a big-M method so as to convert the nonlinear terms into a mixed integer programming model and directly solve the mixed integer programming model through a solver. According to the invention, the flexible resource regulation potential of the hydrogen refueling station is fully exploited, the flexibility of market transaction is improved, and the income of the hydrogen refueling station is increased.

The embodiment of the invention provides a single-bus communication method and device, a chip and a medium, and the method comprises the steps: enabling a host to enter an initialization mode after the host confirms that an internal power supply and a clock of a slave are stable; the host sends a wake-up code to the slave within a set time to wake up the slave, and releases the bus to enter a normal communication mode; the host sends a communication signal to the slave through the improved communication frame; after the host receives a response signal of the slave, the host releases the bus, the bus is pulled to a high level from an external pull-up resistor, and the transmission is ended; wherein the format of the improved communication frame comprises ten codes, one code corresponds to one bit, and the ten codes sequentially comprise one start bit, six address bits, one read-write control bit, one data bit and one response bit. A wake-up code is set before communication between the host and the slave, so that the slave is prevented from being mistakenly waken up. According to the communication mode, the coding mode is simplified, the chip area is reduced, and the transmission speed of the chip is also improved.

The invention discloses a high-pressure air compressor fault alarm method and device, an electronic terminal and a storage medium in the technical field of power transformation and distribution. The method comprises the steps that time sequence features are obtained; inputting the time sequence feature into the prediction model, extracting a local feature of the time sequence feature through a convolutional layer, capturing a hidden state of the local feature in a current time step through a GRU layer, generating a comprehensive sequence representation, integrating the comprehensive sequence representation based on a full-connection layer to obtain an integrated feature, and outputting the integrated feature. Obtaining a predicted voltage at an output layer based on the integrated features; and triggering a monitoring alarm corresponding to a prediction result when the prediction voltage is detected to be greater than a preset upper limit voltage or less than a preset lower limit voltage in a preset detection period. According to the invention, the technical problem that the fault recovery time is prolonged due to the fact that maintenance personnel are difficult to quickly identify the fault and take corresponding measures because the upper monitoring system cannot provide clear alarm content can be solved.

The invention discloses a soothing and moisturizing composition as well as a preparation method and application thereof, and relates to the technical field of cosmetics. The invention provides a soothing and moisturizing composition. The soothing and moisturizing composition is prepared from the following components in parts by weight: 1 to 10 parts of chondrus crispus extract, 1 to 10 parts of water temple porphyra polysaccharide, 1 to 10 parts of crithmum maritimum extract, 0.05 to 2 parts of oligopeptide-1 and 0.05 to 2 parts of palmitoyl pentapeptide-4. The inventor discovers that when existing at the same time, the chondrus crispus extract, the laver polysaccharide, the crithmum maritimum extract, the oligopeptide-1 and the palmitoyl pentapeptide-4 can cooperate with one another and act together from multiple aspects, and the effects of multi-channel, deep moisturizing, soothing and skin barrier enhancing are better achieved.

The invention discloses a wear-resistant polyurethane material and a wear-resistant polyurethane rubber roller, and relates to the technical field of high polymer materials. When the wear-resistant polyurethane material is prepared, firstly, 4, 4 '-(10, 20-di-4-pyridyl-21H, 23H-porphin-5, 15-diyl) dibenzoic acid is reduced through a reducing agent, then is oxidized through an oxidizing agent, and finally reacts with hydroxylamine hydrochloride and triethylamine to obtain functionalized porphyrin; secondly, enabling the aramid short fibers subjected to acid etching to react with 3-chloropropyltriethoxysilane to obtain modified aramid short fibers; finally, 4, 4-diphenylmethane diisocyanate and polytetrahydrofuran ether glycol are subjected to a reaction, functionalized porphyrin and 1, 4-butanediol serve as chain extenders, then the modified aramid short fibers are added, and the wear-resistant polyurethane material is obtained through vulcanization. The wear-resistant polyurethane material prepared by the invention can be used for manufacturing a polyurethane rubber roller, and has high strength, good antibacterial property and self-repairing property.

The invention belongs to the technical field of conformal materials, and particularly provides a single-component conformal material as well as a preparation method, application and an application method.The single-component conformal material comprises high-temperature-resistant resin and a physical cross-linking agent, the high-temperature-resistant resin is one or more of high-temperature-resistant resin meeting the chemical formula A or one or more of emulsions formed by the high-temperature-resistant resin meeting the chemical formula A. The single-component conformal material provided by the invention is a conformal material which is used in a single-component form and has certain surface hydrophobicity, has high temperature resistance, good environment barrier capability and relatively high insulation and corrosion resistance, is an organic silicon-based conformal material with certain surface environment protection performance, and has a good application prospect. While maintaining a good environmental protection effect, the coating has good construction characteristics, and is suitable for protection of surfaces of various base materials.

The invention relates to the field of coating materials, and provides an anticorrosive coating for the bottom of a ship and a preparation method thereof, which is made of the following components: a boron nitride coated capsaicin filler, a boron nitride modified fluorine silicon copolymer, a fluorine phosphorus monomer modified waterborne acrylic emulsion, an epoxy resin, a film former, a defoamer, a dispersant, an initiator, a preservative and deionized water; the preparation method of the coating: the filler is first dispersed in a high speed in a stirring kettle with deionized water, a boron nitride coated capsaicin, a boron nitride modified fluorine silicon copolymer and a dispersant according to a proportion to form a dispersed solution, and then the solution is injected into a paint mixing tank, and the fluorine phosphorus monomer modified waterborne acrylic emulsion, an epoxy resin, a preservative, a film former and a defoamer are added, heated and stirred, and then cooled to room temperature. The anticorrosive coating of the invention has excellent properties such as high wear resistance, high corrosion resistance and inhibition of marine biological attachment, so as to meet the demand for high-performance anticorrosive coatings.

The invention discloses a distribution network feeder fault self-healing rate automatic analysis method and system, and relates to the technical field of distribution network analysis, and the method comprises the steps: obtaining the real-time data and historical data of each feeder in an adjustment set, constructing a judgment matrix for the feeder, carrying out the sorting analysis of the feeder according to the judgment matrix, and carrying out the automatic analysis of the fault self-healing rate of the feeder. Performing priority ranking on all the feeders in the adjustment set, generating a resource allocation strategy of the feeders according to a ranking result, regularly obtaining the self-healing rate of the feeders at each time point in the self-healing process of each feeder according to the resource allocation strategy, and after the self-healing of all the feeders is completed, obtaining the self-healing rate of the feeders at each time point. And generating self-healing indexes for the feeder lines by combining the self-healing rates of the feeder lines at the plurality of time points, comprehensively analyzing the self-healing indexes of all the feeder lines, and judging whether the distribution network needs to be managed or not. The analysis system ensures that a high-priority feeder line obtains more resource support and reasonably distributes limited resources through priority ranking and a scheme, has high adaptability and can flexibly cope with complex scenes.

The invention discloses a health care device which is used for transmitting low-frequency waves to a spine or a navel so as to increase the number of endothelial precursor cells (EPC) and reduce the number of circulating endothelial cells (CEC), so that the risk of cardiovascular related adverse events can be reduced. The health care device comprises a box body, and a power supply, a speed controller, a rotating mechanism, a connecting rod mechanism, a knocker and a conical table which are arranged in the box body. The power supply is electrically connected with the speed controller so as to output electric power to the speed controller. The speed controller is electrically connected with the rotating mechanism and controls the rotating mechanism to rotate at a preset speed. The rotating mechanism is connected with the knocker through the connecting rod mechanism so as to drive the knocker to knock a plane of the conical table, and the knocker generates a low-frequency wave with a preset frequency. The invention also provides the health care device which can be used for transmitting low-frequency waves to the spine or navel.

The invention provides a pre-disaster and post-disaster two-stage power grid toughness optimization method and system for extreme weather, and aims to improve the stability and self-healing capability of a power grid in an extreme weather event. The method comprises the following steps: firstly, identifying potential risk factors in advance by monitoring the operation state of a power distribution network and combining weather forecast information; in the pre-disaster stage, a mixed integer quadratic programming (MIQP) optimization method is adopted to carry out optimal distribution on power grid resources so as to minimize load loss and power interruption risks. When an extreme weather event occurs, the system dynamically adjusts resource allocation according to real-time data through a model predictive control (MPC) optimization method. The system integrates a monitoring and data collection module, a pre-disaster planning module, a post-disaster recovery module, a scheduling and execution module and a user interface module, and through cooperative work of the modules, reliability and stability of a power system under extreme weather conditions are ensured.

The invention relates to a preparation method and application of hyaluronic acid-based hydrogel with rapid self-healing capability and excellent mechanical performance, and can effectively solve the problems that the use efficiency is reduced or the antibacterial performance is poor due to the fact that the hyaluronic acid-based hydrogel cannot recover to the original structure and performance at the fastest speed after being damaged by external force in the prior art. In order to solve the problem that when hydrogel is in contact with a human body, local infection and inflammation can be caused, the technical scheme for solving the problem is as follows: quaternized carboxymethyl chitosan and oxidized hyaluronic acid are taken as substrate materials, hydrazide hyaluronic acid is introduced into a reaction system, and the hydrogel is prepared by virtue of a co-crosslinking effect among a dynamic imine bond, an acylhydrazone bond, a disulfide bond and a hydrogen bond. The hyaluronic acid-based hydrogel has the advantages of rapid self-healing performance, excellent mechanical performance, good pH responsiveness, biocompatibility, biodegradability, drug sustained release performance and the like, can meet the specific requirements of a drug delivery system for materials and structures, and is an innovation of the preparation method of the hyaluronic acid-based hydrogel.

The invention relates to the field of preparation of glass fiber boards, in particular to a composite glass fiber board and a preparation method thereof. According to the composite glass fiber board provided by the invention, a dynamic imine bond cross-linked dual-network structure is constructed, so that the mechanical property and durability of the glass fiber board are remarkably improved, and the composite glass fiber board has high-efficiency repeated self-repairing capability, is wide in application field, can be applied to the building fields such as home furnishing boards and the like, and also can be applied to the building fields such as building materials. The method is also suitable for automobile manufacturing, aerospace and other fields. The invention further provides a preparation method of the composite glass fiber board, the preparation method is simple and easy to implement, and expensive equipment is not needed.