7254results about How to "Increase elasticity" patented technology

The invention discloses a containerized resource dynamic allocation method for a power distribution network system and electronic equipment. The method comprises the following steps: judging that resource use data is greater than a preset resource threshold value by monitoring the resource use condition of each physical node in a power distribution network system; if yes, calculating a load balancing index of each physical node, and generating a container migration task list based on the load balancing index, the service priority and the service quality requirement information; packaging container data corresponding to the to-be-migrated container in the migration task list, and determining container state snapshot information and network connection information of the to-be-migrated container; establishing a secure channel between the source node and the target node based on the network connection information, and transmitting container data and container state snapshot information of the source node to the target node; reconstructing a container operation environment on the target node, and generating a target container; and suspending the to-be-migrated container on the source node, and activating the target container on the target node. And efficient migration of the container is realized.

The invention relates to the technical field of dynamic migration, in particular to an edge computing management system supporting dynamic migration of an AI model. The system comprises a state mining module used for identifying available edge computing devices; performing multi-frequency information monitoring on the available edge computing devices, and performing device comprehensive state mining to generate edge device comprehensive state features; the edge topology module is used for carrying out node position positioning one by one based on edge equipment comprehensive state characteristics and carrying out instant state mapping modeling so as to construct an edge computing node topology model; the task flow trend module is used for acquiring an AI model task running log; and performing task queue analysis on the AI model task running log, and then performing model task traffic trend analysis to obtain AI model task traffic trend data. According to the invention, edge computing management with quick response and high processing efficiency is realized.

The invention discloses a cloud edge computing power network routing optimization method in the technical field of computing power networks. The method comprises the following steps: acquiring high-dimensional computing power node embedding representation and edge embedding representation of a network topology structure of a cloud edge computing power network; acquiring a hidden state set of each link in the network topology structure when message transmission is carried out between the computing power nodes; according to the high-dimensional computing power node embedding representation, the edge embedding representation and the hidden state set, predicting future traffic of each link in the network topology structure to obtain state information of each link; a pre-constructed routing scheduling problem is converted into a Markov decision process; based on a Markov decision process, a multi-agent near-end strategy optimization algorithm is adopted to train agents, and an optimal routing strategy is obtained; wherein the routing scheduling problem is constructed and acquired by taking minimization of a link utilization rate standard deviation and task transmission time as targets. According to the method, the problems of low routing optimization efficiency and poor flexibility in the existing cloud edge computing power network are solved.

The invention discloses a slow charging and quick discharging method of a storage and charging integrated charging pile. Comprising the following steps: S1, predicting the charging demand of the electric vehicle through obtained power grid load data, energy storage system state information and other external factors; s2, predicting the state of the energy storage system through the acquired information such as the charge state, the temperature condition and the health degree of the battery; s3, constructing a slow-charging and quick-discharging scheduling strategy based on the prediction result of the charging demand of the electric vehicle and the prediction result of the state of the energy storage system in combination with factors such as an electricity price policy and battery life; and S4, monitoring the load condition of the power grid, the use condition of the charging pile and the state information of the energy storage system in real time, and optimizing and adjusting the scheduling strategy of slow charging and quick discharging. By optimizing the charging and discharging processes, efficient utilization of energy, stability of the power grid load and prolonging of the service life of the battery are achieved, and the charging and discharging strategies can be flexibly adjusted according to the power grid load and electricity price changes.

The invention discloses a safe airtight cold-resistant low-smoke flame-retardant control cable used in an explosion environment, and relates to the technical field of cables, a first hot melting pipe is filled with expanded graphite, the outer side of a wrapping tape is uniformly sleeved with protective iron rings at intervals, the outer sides of the protective iron rings are uniformly provided with fixing holes at intervals, and a communication port is formed between every two adjacent fixing holes; according to the invention, the heat insulation cotton, the compression-resistant rib, the protection iron ring, the arc-shaped elastic sheet, the arc-shaped frame and the elastic roll absorb and buffer external force, so that the compression resistance and impact resistance of the cable are enhanced; the aluminum hydroxide powder absorbs a large amount of heat and delays combustion, the expanded graphite in the first hot melting pipe is heated to expand, the expanded graphite is diffused to a gap between the shielding layer and the wrapping layer, flame is prevented from combusting to the interior of the cable, the working time is prolonged, and the economic loss is reduced.

The invention provides a high-rate and high-first-effect biomass hard carbon composite negative electrode material and a preparation method and application thereof, the hard carbon composite negative electrode material has a core-shell structure, the core-shell structure comprises a core, an inner shell and an outer shell, the core comprises biomass hard carbon containing P and graphite microcrystals, the inner shell comprises graphene, and the outer shell comprises a carbon nanotube. According to the invention, the surface of the biomass hard carbon is coated with the graphene layer, the carbon nanotubes grow on the surface of the graphene in situ, and transition metal synergistically induces the hard carbon to be arranged and grow along the graphene layer in a high-temperature carbonization process, so that the graphene coating layer is tightly coated, and the cycle performance of the material is improved; transition metal ions catalyze graphitization to generate a more regular and ordered graphite-like layer microcrystalline structure coating layer, so that the defects of graphene and carbon nanotubes are reduced, and the first coulombic efficiency is improved; in addition, the ion transmission capability is improved by phosphorus doping, the electron transmission capability is improved by graphite microcrystals generated by catalysis in hard carbon, and the rate capability is ensured by synergistic improvement of ion transmission and electron transmission.

The invention relates to the field of biological medicines, in particular to a facial anti-aging collagen peptide, a composition and an application of the facial anti-aging collagen peptide, and particularly relates to a 21-type recombinant humanized collagen peptide (ColpepA1 21) and an application of a composition of the 21-type recombinant humanized collagen peptide in anti-aging treatment and skin care. The recombinant collagen provided by the invention can effectively promote the repair process after skin injury, enhance the hydration state and barrier function of the skin, reduce fine lines and wrinkles, and improve the compactness and elasticity of the skin.

The invention relates to the technical field of material management, and discloses an infrastructure material cyclic application management and control system, which comprises the following modules: an intelligent material identification and real-time data acquisition module, which is used for carrying out automatic identification, classification and real-time data acquisition on infrastructure materials based on various sensor technologies (visual identification, RFID, laser scanning and NFC) and a deep learning algorithm, a digital material file is generated, and dynamic tracking and accurate positioning of materials are achieved; and the block chain-based full life cycle management module is used for carrying out data management and encrypted storage on the full life cycle (from purchasing, transportation, storage, use, maintenance, cyclic utilization to scrapping treatment) of the materials. Through close combination of a multi-mode sensor technology (visual identification, RFID, laser scanning and NFC) and a deep learning algorithm, all-directional and multi-dimensional identification and real-time data acquisition can be performed on capital construction materials in a complex and changeable environment.

The invention provides an instant-penetration expanded polytetrafluoroethylene artificial blood vessel and a preparation method thereof. The preparation method comprises the following steps: mixing PTFE dispersion resin and lubricating oil with a first compression ratio, and curing to obtain a first PTFE mixture; mixing the PTFE dispersion resin with a second compression ratio and lubricating oil, and curing to obtain a second PTFE mixture, wherein the first compression ratio is higher than the second compression ratio; the first PTFE mixture is pre-pressed into a middle layer cylinder; pre-pressing the second PTFE mixture into an inner-layer cylinder and an outer-layer cylinder; the middle-layer cylinder is put into the outer-layer cylinder, the inner-layer cylinder is put into the middle-layer cylinder to obtain a composite cylinder, and the composite cylinder is subjected to blank pressing treatment to obtain a secondary blank pressing cylinder; and carrying out one-way stretching on the secondary compaction cylinder to obtain the instant-penetration expanded polytetrafluoroethylene artificial blood vessel which is not layered after being punctured.

The invention discloses a high-flexibility winding-resistant robot cable, and relates to the technical field of robot cables, the robot cable comprises a plurality of cable cores, the cable cores are wrapped by a belting layer, a twisting gap of the cable cores is filled with a filler, the belting layer is wrapped by a shielding layer, and the shielding layer is wrapped by an outer sheath layer; the outer sheath layer is prepared from the following components: 80-100 parts of PVC resin, 30-60 parts of nitrile rubber powder, 20-30 parts of a polyolefin thermoplastic elastomer, 10-30 parts of trioctyl trimellitate, 5-15 parts of dioctyl sebacate, 5-25 parts of aluminum hydroxide, 8-15 parts of carbon black, 10-20 parts of modified carbon fiber, 3-6 parts of a heat stabilizer, 1-3 parts of an antioxidant and 1-3 parts of a lubricant; optimized balance of flexibility, bending resistance, mechanical strength and environmental adaptability is achieved, and a high-performance and long-service-life key component is provided for modern industrial automation and robot application.

The invention belongs to the technical field of metal organic frameworks, and particularly relates to a high-performance photocatalytic metal organic framework antibacterial material as well as a preparation method and application thereof. The preparation method comprises the following steps of: growing a metal organic framework UiO 66 which takes a cerium element as a metal node on a single-layer graphene oxide UiO66 (at) GO in situ, loading arginine small molecules in the MOF framework to obtain a high-performance photocatalytic MOF antibacterial material UiO66 (at) GO (at) arg, forming a nano hydrogel with a stable three-dimensional structure with chitosan, and performing antibacterial treatment by using the nano hydrogel as a wound dressing. The Ce-based MOF composite QCS / GO-UiO 66-coated arg / PNIPAm hydrogel prepared by the preparation method disclosed by the invention has excellent properties such as elasticity, adhesive power, water absorption and biocompatibility; and under illumination, the photocatalyst has an excellent photocatalytic sterilization effect, and has a good killing effect on escherichia coli and staphylococcus aureus.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-strength polypropylene composite material for a filter plate and a preparation method of the high-strength polypropylene composite material. The preparation method of the polypropylene composite material comprises the following steps: uniformly mixing polypropylene, polyimide, maleic anhydride grafted polypropylene, nylon 6, a maleic anhydride grafted styrene-butadiene-styrene copolymer, aminated calcium carbonate, modified glass fiber, an antioxidant and a lubricant according to a mass ratio of 100: (12-18): (2-5): (1-2): (3-5): (3-7): (6-10): (0.2-0.5): (0.1-0.3), carrying out melt blending, extruding, cooling, granulating, and carrying out extrusion molding to obtain the polypropylene composite material. Through the synergistic effect of the nano calcium carbonate and the glass fibers, the mechanical property of polypropylene is improved, all the raw materials are crosslinked to form a uniform network structure, more energy is absorbed when a matrix is impacted by external force, and it is guaranteed that the filter pressing plate is not damaged when deforming under the high-temperature and high-pressure conditions; the obtained polypropylene composite material is high in strength, good in heat resistance and excellent in comprehensive performance.

The invention discloses a wear-resistant high-strength composite polyurethane sieve plate and a preparation method thereof, and belongs to the technical field of polyurethane sieve plate processing.The preparation method comprises the following steps that modified polyurethane is added into xylene, the temperature of a reaction system is increased to 90-100 DEG C, stirring is conducted till the system is dissolved and clarified, and a polyurethane sieve plate is obtained; the preparation method comprises the following steps: adding olefin double bond modified aluminum oxide powder and a catalyst into a reaction system, taking composite polyurethane prepared from modified aluminum powder reinforced modified polyurethane as a polyurethane sieve plate base material, and carrying out reinforced crosslinking on the composite polyurethane by using o-cresol formaldehyde epoxy resin and modified nylon fiber; the strong acid and alkali corrosion resistance of the composite polyurethane sieve plate is effectively improved, and the service life of the composite polyurethane sieve plate is effectively prolonged.

The invention discloses a high-performance ozone-resistant air spring and a preparation method thereof. An inner-layer rubber material and an outer-layer rubber material of the air spring are mainly prepared from the following components: chloroprene rubber, natural rubber, butadiene rubber, an anti-aging agent AW-66, an anti-aging agent 4010NA, an anti-aging agent 4020, microcrystalline wax, N660 carbon black, naphthenic oil, zinc oxide, CZ and insoluble sulfur. The preparation method comprises the steps of first-stage mixing, rubber discharging, standing, second-stage mixing, rubber discharging, standing, rubber sheet calendering, blastocyst forming, wrapping the blastocyst on the surface of a capsule, and performing high-pressure nitrogen vulcanization to form the air spring. The chloroprene rubber, the natural rubber and the butadiene rubber are blended and modified, so that the rubber has the following characteristics that the ozone resistance and the weather aging resistance are remarkably improved; the properties such as tensile strength, stress at definite elongation and tear resistance are improved; the production process properties such as extrusion and calendaring properties are improved, the deflection resistance of the rubber material is improved, and the service life of the product is prolonged.

The invention discloses a firming and anti-wrinkle composition, face cream and a preparation method of the face cream, and particularly belongs to the field of preparations for dressing and makeup. The firming and anti-wrinkle face cream comprises a firming and anti-wrinkle composition, composite polypeptide, recombinant collagen, a skin conditioner and the like, and the firming and anti-wrinkle composition comprises a leontopodium alpinum flower / leaf extract, a peach resin extract, a radix gentianae extract and a trollius chinensis bunge extract. The composite polypeptide is at least two of palmitoyl tripeptide-1, palmitoyl tetrapeptide-7, acetyl hexapeptide-8 and palmitoyl hexapeptide-12, and the recombinant collagen is at least one of recombinant XVII type collagen, recombinant I type collagen, recombinant IV type collagen, recombinant V type collagen and recombinant VII type collagen. The firming and anti-wrinkle face cream provided by the invention can effectively improve the elasticity value of skin, can remarkably improve the firming degree of the skin, and has excellent anti-wrinkle and anti-aging effects.

The invention discloses a high-voltage power transmission line energy-taking unmanned aerial vehicle clamping device and a control method thereof, and relates to the technical field of high-voltage power transmission line clamping, the high-voltage power transmission line energy-taking unmanned aerial vehicle clamping device comprises a clamping jaw and a base used for fixing the clamping jaw, the opening size of the clamping jaw is adjustable, and the clamping jaw is used for adapting to power transmission cables of different sizes; the high-voltage power transmission line energy-taking unmanned aerial vehicle clamping device further comprises a guiding mechanism which is arranged on the base and used for guiding the cable into the clamping jaw; the clamping jaw is further provided with an automatic closing assembly which is pressed by the cable to drive the clamping jaw to be automatically closed when the cable enters the clamping jaw. According to the high-voltage power transmission line energy-taking unmanned aerial vehicle clamping device and the control method thereof, the clamping requirements of power transmission cables of various sizes can be met, meanwhile, the control difficulty is lower, and the clamping success rate is higher.

The invention discloses a network resource optimization method for network slices, which comprises the following steps of: acquiring historical flow data, user behavior data and network topology information of each network slice from each network node in real time by utilizing a distributed data acquisition system, and performing data preprocessing on the historical flow data, the user behavior data and the network topology information to form a feature data set; inputting the feature data set into a prediction model constructed based on an attention mechanism and a mixed density network algorithm, optimizing the network weight through a gradient descent algorithm, and training the prediction model; inputting feature data of the current moment into the trained prediction model, and outputting prediction values of probability distribution of different network slices for future traffic demands; and formulating a resource pre-allocation strategy according to the predicted probability distribution of different network slices for future traffic demands, and dynamically optimizing and adjusting network resources. According to the invention, through accurate resource pre-allocation, network resources are utilized to the maximum extent, the operation cost is reduced, and the resource utilization efficiency is improved.

The present invention proposes a nanofiber composite vehicle air filter paper with a gradient structure and a preparation method thereof, which is used to solve the technical problems of poor bonding strength between nanofibers and substrates and low filtration efficiency in nanofiber filter materials. The present invention uses a preparation process combining electrostatic spinning and electrostatic spraying to prepare a nanofiber composite vehicle air filter paper, which includes an ultrafine nanofiber mesh layer, a nanofiber layer and a filter paper layer arranged in sequence. The present invention has a good effect on PM under industrial standard wind speed conditions. 0.3 The initial filtration efficiency of particulate matter can reach 99.9%, reaching the H12 standard for air filtration materials. More importantly, in the self-cleaning backflush test, after 10,000 backflush tests, the PM 0.3 The filtration efficiency can still be maintained above 90%. This provides a new strategy for high-performance nanofiber filtration materials, which is of great significance to the high-tech, high-quality, green and sustainable development of nonwoven materials and filtration materials.

The invention discloses a multifunctional electronic product screen protective film and a preparation method thereof. The protective film comprises a modified base film and a multifunctional composite layer compounded on the surface of the modified base film, the multifunctional composite layer comprises an elastic buffer layer and a self-repairing layer which are sequentially arranged from inside to outside; wherein the elastic buffer layer is an elastic buffer layer with gradient density; the elastic buffer layer comprises the following components in parts by weight: 100 parts of a thermoplastic polyurethane elastomer, 15-25 parts of hollow glass microspheres, 10-15 parts of polyethylene glycol and 3-6 parts of an isocyanate cross-linking agent; the self-repairing layer comprises the following components in parts by weight: 100 parts of a dynamic reversible covalent bond polymer, 30-40 parts of phase change material microcapsules, 10-15 parts of nano cellulose, 5-8 parts of a near-infrared photosensitive initiator and 2-4 parts of an antioxidant. Compared with the prior art, the protective film provided by the invention has excellent scratch self-repairing performance, good adhesion and high anti-explosion screen performance.

The invention relates to the technical field of yarn post-treatment, in particular to foamed yarn and a preparation method thereof. The preparation method comprises the following steps: sizing yarns in a mixed solution of a curing agent and slurry, and then sequentially curing and foaming to obtain foamed yarns, the slurry comprises foaming resin and thermal expansion microspheres. According to the preparation method, slurry is cured and foamed to form a foaming coating formed by the flexible resin and the elastic filler on the yarn. The foaming coating can improve the softness and rebound resilience of the yarn; the foaming coating contains thermal expansion microspheres, so that the bulkiness and the air permeability of the yarn can be improved after expansion; and the curing agent in the foaming coating is crosslinked with the foaming resin, so that the hydrolysis resistance and the scratching resistance of the foaming coating can be improved.

The invention belongs to the technical field of shoe materials, and particularly relates to a high-elasticity shoe material and a preparation process thereof. The high-elasticity shoe material comprises the following components in parts by weight: 70-80 parts of thermoplastic polyurethane elastomer; 10 to 20 parts of an ethylene-vinyl acetate copolymer; 15 to 20 parts of an ethylene-octylene copolymer; 10 to 15 parts of nitrile rubber; 8-10 parts of a composite antibacterial agent; 2-4 parts of a foaming agent; 0.6-1 part of zinc oxide; 1-2 parts of an antioxidant; 10-15 parts of a composite filler; the components are subjected to a blending foaming process to prepare the shoe material which is moderate in hardness, light in weight and high in elasticity, and the prepared shoe material also has good strength, wear resistance, yellowing resistance, antibacterial property and flame retardance.

The invention belongs to the technical field of rubber preparation, and discloses a seawater-corrosion-resistant high-resilience low-compression-deformation modified ethylene propylene diene monomer rubber material as well as a preparation method and application thereof. The modified ethylene propylene diene monomer material comprises the following components: ethylene propylene diene monomer, a polyolefin elastomer, a filler, a processing aid, tackifying resin, an anti-aging agent, and at least one of an optional softening dispersant, a vulcanizing agent, an accelerant and a scorch retarder, the processing aid comprises zinc methacrylate; the accelerant comprises p-benzoquinone dioxime; and the anti-aging agent comprises 2, 6-di-tert-butyl-4-methylphenol. According to the invention, from the perspective of formula design, the high-temperature thermo-oxidative aging resistance, the hydrothermal thermal aging resistance and the compression permanent deformation resistance in a high-concentration seawater environment of the EPDM are improved in a targeted manner.

The invention discloses lysine cross-linked hyaluronic acid gel as well as a preparation method and application thereof. The preparation method of the lysine cross-linked hyaluronic acid gel comprises the following steps: mixing a hyaluronic acid substance, DMTMM and lysine, and carrying out a cross-linking reaction to prepare the lysine cross-linked hyaluronic acid gel, the hyaluronic acid substance is added in the form of a hyaluronic acid substance solution, and the solution comprises a hyaluronic acid substance with the weight-average molecular weight of 70WDa-180WDa and a buffer solution; the hyaluronic acid substance accounts for 3-5% of the hyaluronic acid substance solution in percentage by mass; the mass ratio of the DMTMM to the hyaluronic acid substance is (0.74-1.1): 1. The cross-linked hyaluronic acid gel is prepared by taking lysine as a cross-linking agent, so that the prepared gel is ensured to have ideal biocompatibility and use safety. The gel prepared by the method also has ideal mechanical properties, and the degradation speed meets the requirements of injection filling materials.

The invention discloses a chain extender containing a hydrazide structure, a preparation method of the chain extender and application of the chain extender in preparation of polyurethane. The chain extender containing the hydrazide structure is prepared by carrying out Michael addition reaction on raw materials including a hydrazide compound and unsaturated carboxylic ester; the Michael addition reaction comprises a reaction process of carrying out addition on amino in the hydrazide compound and a carbon-carbon unsaturated bond in the unsaturated carboxylic ester to generate secondary amine. According to the invention, the problem that a solvent is needed and / or high-temperature melting is needed when a hydrazide compound is used as a polyurethane chain extender can be solved, and a thermoplastic polyurethane elastomer material with relatively high mechanical strength and toughness and excellent mechanical recovery performance can be prepared.

The invention relates to the technical field of fabrics, and discloses a preparation method of a high-elastic anti-wrinkle blended fabric, which comprises the following steps: adding sodium carbonate, an organosilicon quaternary ammonium salt triazine finishing agent and a cotton / spandex blended fabric into water, soaking, then soaking and rolling twice, washing, and then pre-drying and baking to obtain the high-elastic anti-wrinkle blended fabric. The finishing agent contains cyanuric chloride groups, active chlorine atoms of the cyanuric chloride groups can react with hydroxyl groups of the cotton fabric, so that the finishing agent is connected to the surface of the blended fabric through stable chemical bonds, meanwhile, the finishing agent contains a large number of amido bonds, and the amido bonds and carbamate groups of spandex fabric form hydrogen bond interaction, so that the finishing agent can be used for finishing the cotton fabric. The finishing agent can be firmly attached to the surface of the blended fabric and has good washing resistance, the finishing agent is not prone to falling off after multiple times of washing, and the fabric still has high wrinkle recovery angle, moisture regain and good hand feeling and keeps good wrinkle resistance, hydrophilic performance and soft and elastic hand feeling.

The invention provides recombinant IV-type collagen as well as a preparation method and application thereof, and relates to the technical field of biochemical engineering. The preparation method of the recombinant IV-type collagen comprises the following steps: obtaining a codon from amino acid of the recombinant IV-type collagen, further obtaining a target gene, and synthesizing the target gene onto an expression vector to obtain a plasmid; transferring the plasmid into an expression host, and screening a positive transformant to obtain an expression strain; and culturing the expression strain, and expressing the target protein to obtain the crude recombinant IV-type collagen. The high-purity recombinant IV-type collagen is prepared through a genetic engineering technology, and the recombinant IV-type collagen can significantly down-regulate inflammatory factors and reduce inflammation; heat injury can be reduced by up-regulating heat shock protein; after heat injury, the recombinant IV-type collagen can obviously lower metal matrix protease of heat injury cells, and also can obviously promote gene expression of type I collagen and type III collagen, improve skin elasticity and moisture content and delay skin aging.

The invention discloses a collagen composition for skin substrate repair and skin care application thereof, and the collagen composition comprises the following components: 1-3% of soluble III-type collagen, 1-5% of hyaluronic acid, 1-2% of plant extract, 0.1-0.5% of allantoin, 0.2-0.5% of dipotassium glycyrrhizinate, 1-5% of glycerol, 1-5% of butanediol, 1-5% of 1, 2-propylene glycol, 1-5% of 1, 3-propylene glycol, 1-5% of propylene glycol and the balance of water. The cleaning agent is prepared from the following components in percentage by weight: 1 to 2 percent of 1, 2-hexanediol, 0.1 to 0.5 percent of phenoxyethanol, 0.1 to 0.5 percent of ethylhexylglycerin, 0.1 to 0.5 percent of carbomer, 0.1 to 0.5 percent of triethanolamine and the balance of water. The collagen III is added, so that the problems of wrinkles and skin aging are remarkably relieved. According to the skin-care lotion, the oily composition and the water-based composition are reasonably proportioned, so that excellent moistening and moisturizing effects are provided, the moisture balance of the skin is favorably maintained, and the skin is kept soft and moist. The added plant extract, hydrolyzed protein and mineral substances not only nourish and repair the skin, but also can improve various skin problems, enhance the endurance capacity of the skin and avoid the condition that the skin wrinkles are increased during the period of stopping using.

The invention relates to the technical field of high polymer materials, and provides impact-resistant polystyrene and a preparation method thereof. The impact-resistant polystyrene comprises the following raw materials in parts by weight: 70-80 parts of polystyrene, 10-15 parts of styrene butadiene rubber, 10-20 parts of wood fiber, 1-2 parts of an antioxidant, 2-3 parts of a lubricant and 0.5-1 part of a vulcanizing agent. The styrene-butadiene rubber is composed of first styrene-butadiene rubber and second styrene-butadiene rubber which have different styrene mass contents. According to the technical scheme, the problem of poor impact resistance of polystyrene in related technologies is solved.

The invention belongs to the technical field of cloud storage, and particularly relates to an enterprise service management cloud storage system which comprises a system initialization module, a distributed data storage module, a data encryption module, an authority control module, a multi-level cache module, a data backup and recovery module, a log monitoring module and a task scheduling and dynamic extension module. The distributed data storage module is responsible for dividing data in enterprise service management into a plurality of data blocks; the data encryption module is used for encrypting the enterprise service data stored in the cloud; the authority control module is responsible for managing the access authority of the user to the data; the multi-level cache module accelerates data access by configuring a local cache and a global cache; the data backup and recovery module is responsible for backing up the stored data regularly; the log monitoring module records various operation logs of the system; and the task scheduling and dynamic extension module is used for dynamically distributing calculation and storage resources according to the priority of the task and the utilization rate of the system resources.

The invention belongs to the technical field of polyurethane materials, and provides a high-damping anti-fatigue and anti-aging polyurethane elastomer and a preparation method thereof. The high-temperature-resistant polyurethane elastomer is prepared from the following raw materials in parts by weight: 20 to 30 parts of poly (diethylene glycol adipate) glycol (PDA), 30 to 50 parts of polytetrahydrofuran ether glycol (PTMEG), 5 to 15 parts of chain extender, 0.1 to 0.3 part of A33, 0.1 to 0.2 part of organic tin catalyst, 2 to 5 parts of hindered phenol antioxidant, 1 to 3 parts of hindered amine light stabilizer, 3 to 8 parts of nano particles and 30 to 50 parts of isocyanate prepolymer. The isocyanate prepolymer is prepared from 1, 4-phenyl diisocyanate (PPDI) and branched chain-containing polytetrahydrofuran glycol PTXG according to a mass ratio of 1: (1.8 to 2.2). The polyurethane elastomer is excellent in damping performance and fatigue aging resistance, and meets the use requirements under complex working conditions.