140results about How to "Troubleshoot Migration" patented technology

The invention discloses water-based polyurethane composite adhesive for tanning and a preparation method and application of the composite adhesive, belongs to the technical field of water-based polyurethane composite adhesive preparation methods, and in particular relates to a method for preparing composite adhesive in the fields of artificial leather and synthetic leather. The method for preparing the water-based polyurethane composite adhesive for tanning is characterized by comprising the following steps of: reacting polyol polymer and isocyanate, adding chain extender, hydrophilic chain extender, cross linker, catalyst and solvent, reacting, cooling and emulsifying, to obtain emulsion; and mixing the emulsion, curing agent, wetting agent, tackifier, adsorbent and thickening agent uniformly, and thus obtaining the hot-melt adhesive for artificial leather adhesive layers. The water-based polyurethane composite adhesive for tanning is used for compounding polyvinyl chloride (PVC) / cloth for artificial leather of luggage and clothes. The prepared water-based polyurethane composite adhesive for tanning has high adhesive fastness and good water and solvent resistance, and can be applied to processes of knife coating, roll coating and the like of binding materials of middle layers of artificial leather and synthetic leather in the fields of textiles, leather processing and the like.

The invention relates to high temperature-resistant polyacrylate pressure-sensitive adhesive emulsion and a preparation method and application thereof. The emulsion mainly consists of a hard monomer, a soft monomer, a functional monomer, reactive tackifying resin, a reactive emulsifier, an initiator and a curing agent. The preparation method comprises the following steps of: adding a monomer dissolved with the tackifying resin into the aqueous solution of the reactive emulsifier for pre-emulsification by adopting the pre-emulsification semi-continuous seeding polymerization process, performing polymerization on the pre-emulsified liquid through the initiator, and adding the curing agent to prepare the high temperature-resistant polyacrylate pressure-sensitive adhesive emulsion. The pressure-sensitive adhesive of the invention has heat resistance of 200 DEG C, has excellent water resistance, aging resistance and mechanical property, and can be widely applied to the fields of electronics, electrical appliances, automobile manufacturing and the like.

The invention provides a virtual machine credibility guaranteeing method in a cloud environment and belongs to the field of information safety. The method is characterized in that a virtual credible root module is separated from each server in the cloud environment and is concentrated into a device, the device comprises a physical credible root, credible root virtualization is completed, credibility computing related work is provided for a virtual machine in the cloud environment, and main work content comprises two parts, namely establishing of the communication mechanism between the credible root device and the cloud server and the virtual machine credibility guaranteeing method. According to the method, the virtual credible root and the virtual machine are not on the same platform, virtual machine migration is needed, then the virtual machine and the virtual credible root are correlated again after virtual machine migration, and accordingly the problem of virtual machine migration is effectively solved.

The invention relates to a polylactic acid toughening modifier in the technical field of high polymer material and a preparation method thereof. Lactide ring-opening polymerization is initiated on the terminal hydroxyl of poly (butylene succinate), and purification is carried out, thus obtaining the polylactic acid toughening modifier, the chemical structural formula is as follows. The modifier of the invention prepared by adopting degradable material can solve transport phenomenon and diosmose in the prior art.

The invention relates to a polylactic acid toughening and modifying agent and a preparation method thereof. The method comprises the following steps of: proportioning the raw materials consisting of polyalcohol and hydroxy acid or polyacid / anhydride according to the mass ratio of 1:0.5 to 1:2,000, and carrying out condensation polymerization at 130-210 DEG C for 0.5-24 h to prepare a polyester polyol polylactic acid toughening and modifying agent polymer. Compared with the prior art, the polylactic acid toughening and modifying agent disclosed by the invention has the advantages of being nontoxic, harmless, completely biodegraded, free from negative effects on the environment and human health and the like.

The invention discloses a branch-shaped damping agent and a preparation method and use thereof. The damping agent is formed by condensing branch-shaped organic montmorillonoid and hindered phenol. The preparation method of the damping agent comprises the following steps: reacting the branch-shaped organic montmorillonoid and the hindered phenol for 2 to 3 hours at 100 to 120 DEG C in a protectiveatmosphere of N2; vacuumizing till the vacuum degree reaches 120 to130pa, and continuing to react for 2 to 4 hours; ending the reaction, adding acetone to dissolve the product of the reaction completely, dripping the solution into ether, and settling; and filtering and drying. The branch-shaped damping agent disclosed by the invention can be used to prepare a damping rubber material. Compared with the prior art, the branch-shaped damping agent solves the migration problem of small molecular damping agents in a rubber substrate; a damping material prepared by the branch-shaped damping agent disclosed by the invention has the advantages of good damping effect, excellent mechanical and wear-resistance properties, low preparation cost, easy implementation and the like.

The invention provides a reactive flame retardant for epoxy resin and flame retardant epoxy resin of the reactive flame retardant, wherein the reactive flame retardant for epoxy resin comprises at least one of DOPO-AM, DOPO-Urea and DOPO-THU. DOPO is subjected to a reaction with acrylamide, urea and thiourea, and the obtained DOPO-AM, DOPO-Urea and DOPO-THU are reactive organo-phosphorus flame retardants, all of which contain an amine group. When the reactive flame retardants are added into epoxy resin, the amine groups can react with epoxy resin, so as to graft the flame retardants onto a main chain of epoxy resin, so that the migration problem of additive flame retardants is solved; the flame retardant has very good flame retardant properties, and has relatively less effect on the mechanical properties and other properties of epoxy resin, so that epoxy resin also maintains good physical and mechanical properties; moreover, the flame retardant can also improve the refractive index ofepoxy resin.

The invention discloses a macromolecular intumescent flame retardant with phosphorus and nitrogen and a synthesis method thereof. The synthesis method comprises the following steps: using acetonitrile as solvent and 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro-3,9-dioxa[5.5]undecane and 2,6-diaminopyridine as raw materials to react under the action of catalyst, and purifying the product to obtain poly(3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro-3,9-dioxa[5.5]undecane)-2,6-diaminopyridine. The method of the invention is simple and is easy to control; the synthetized macromolecular intumescent flame retardant with phosphorus and nitrogen has better compatibility with the matrix and higher char forming characteristic; by adopting the method, the problem of migration, precipitationor volatilization in the machinings of the flame retardant and the polymer matrix can be solved basically; and the flame retardant does not contain halogen, thus the flame retardant is environmentally friendly and has good application prospect.

The invention belongs to the technical field of packaging materials and discloses an environment-friendly water-soluble polyvinyl alcohol packaging film and a preparation method thereof. The packaging film is prepared from the following components in parts by weight: 100 parts of polyvinyl alcohol resin, 5-30 parts of oxidized starch, 5-30 parts of a plasticizer, 1-10 parts of an enhancer, 1-3 parts of a surfactant and 0.05-2 parts of a defoaming agent, wherein the plasticizer is a compound plasticizer which is prepared by compounding glycerin with other plasticizers and contains at least one combination of glycerin / polyglycerin, glycerin / polyethylene glycol 200, glycerin / polyethylene glycol 400, glycerin / polyethylene glycol 600, glycerin / diethylene glycol and glycerin / triethylene glycol. The packaging film can be rapidly completely dissolved into water at the room temperature, is transparent, colorless and toxic-free after being dissolved, is biodegradable, has excellent mechanical properties and can be applied to water-soluble product packages such as pesticides, detergents and water treatment agents.

The invention solves the problem of virtual machine transition among hybrid clouds, and provides a technique for implementing a virtual machine transition system in a hybrid cloud environment on basis of data virtualization. The technique for implementing the virtual machine transition system in the hybrid cloud environment on basis of data virtualization is characterized in that: a cloud data virtualization layer is abstracted between different cloud platforms and different transition applications in the hybrid clouds; the cloud data virtualization layer includes a basic core module and an advanced extension module; the basic core module is used for supporting communication among the different cloud platforms, acquiring and integrating data, and issuing the data to an upper service; and the advanced extension module includes a virtual event processing unit, a transition management unit, a service level audit unit, a virtual machine template management unit, and a transition index optimization unit.

The invention discloses a structure and a fabrication method of an integrated liquid storage pot, and a novel zinc-bromine redox flow battery. The novel zinc-bromine redox flow battery comprises a liquid storage pot 1, a liquid supply pump A2, a liquid supply pump B3, an anode pipeline system 41, a cathode pipeline system 42, a galvanic pile 5, an anode return pipe 71 and a cathode return pipe 72; the liquid storage pot 1 is connected to the liquid supply pump A2, the liquid supply pump B3, the anode return pipe 71 and the cathode return pipe 72, respectively; the galvanic pile 5 is connected to the anode pipeline system 41, the cathode pipeline system 42, the anode return pipe 71 and the cathode return pipe 72, respectively; the liquid supply pump B3 is connected to the anode pipeline system 41; and the liquid supply pump A2 is connected to the anode pipeline system 41 and the cathode pipeline system 42. The anode and the cathode of the battery are connected back to the same liquid storage pot 1, so that the migration problem is fundamentally solved; the system is simple and the fault rate is low; and the same liquid supply pumps are adopted for supplying liquid so that the pressure on the two sides of the anode and cathode pipeline systems is balanced, and the deformation rate of the material is reduced.

The invention discloses an organic silicon damping additive. The molecular structure formula of the organic silicon damping additive is as shown in the description, wherein R is an aromatic group; w / (w+x+y+z)*100%=1%-40%;z / (w+x+y+z)*100%=0.1%-5%; and (x+y) / (w+x+y+z)*100%=55%-98.9%. According to the organic silicon damping additive disclosed by the invention, the volume of a polysiloxane side group of an aromatic imide side group contained in a side chain is larger than that of phenyl, internal friction resistance between chain segments is large, and the damping effect can be improved. In addition, the molecular weight of the organic silicon damping additive and the content of the imide side group are adjusted, so that the damping temperature range is widened. In addition, the organic silicon damping additive disclosed by the invention also contains vinyl chain links and can realize covulcanization with methyl phenyl silicone rubber, so that not only is the migration problem of a low molecular weight damping additive solved, but also the influence on the mechanics of silicone rubber is reduced.

The invention discloses a polymerization emulsion, a preparation method thereof, an aqueous adhesive, and a preparation method and an application of the aqueous adhesive. The preparation method of thepolymerization emulsion comprises the following steps: adding water, a chain transfer agent and a sulfonic acid type reactive emulsifier, performing mixing, dropwise adding an acrylic monomer, performing pre-emulsifying, introducing an inert gas to remove O2, adding a cross-linking agent and an initiator, and performing RAFT polymerization to obtain the polymerization emulsion. The aqueous adhesive is prepared through compounding a water-soluble polymer compound, the polymerization emulsion and water, or is prepared through the RAFT polymerization of the water-soluble polymer compound, raw materials for preparing the polymerization emulsion and water. The invention also discloses the preparation method of the aqueous adhesive. The aqueous adhesive is applied to the production of a lithium-sulfur battery positive plate. The polymerization emulsion has the advantages of wide range of suitable monomers, easiness in control and uniform particle size distribution; the aqueous adhesive hasthe advantages of low solid content and wide viscosity range, and a positive electrode made by using the aqueous adhesive has excellent electrochemical performances; and the preparation methods have the advantages of simplicity, low cost, greenness and environmental protection.

The invention discloses a sealing rubber film for a solar cell module. The sealing rubber film consists of the following components in parts by weight: 100 parts of olefin polymer, 5-30 parts of heat conductive material, 0.05-2 parts of anti-ageing agent and 1-20 parts of adhesive force promoting polymer, wherein the olefin polymer is composed of a first olefin polymer and a second olefin polymer; according to the measurement of a DSC (digital scan converter), the glass transition temperature of the first olefin polymer ranges from (minus) 59 DEG C to (minus) 32 DEG C, and the fusing peak of the first olefin polymer ranges from 42 DEG C to 100 DEG C; the fusing peak of the second olefin polymer ranges from 111 DEG C to 130 DEG C, and the melt flow rate measured under the conditions of 190 DEG C and 2.16 kg is 0.5-5g / 10minute; and the mass ratio of the first olefin polymer to the second olefin polymer is (65:35)-(90:10). The rubber film disclosed by the invention does not permeate towards the transparent rubber film on the glass side, is safe and reliable, obvious in heat conduction effect, and capable of lowering the working temperature of the module and improving the photoelectric conversion efficiency when the module continuously works; and meanwhile, the sealing rubber film is simple in manufacturing process and convenient to use.

The invention provides a data transmitting method and a device. The data transmitting method comprises the steps of: receiving, when a base station receives uplink data, the uplink data forwarded by a first low-power-consumption terminal through a first relay mobile terminal; and forwarding, when transmitting downlink data, the downlink data to the first low-power-consumption terminal or a second low-power-consumption terminal, or, forwarding the downlink data to the first low-power-consumption terminal or the second low-power-consumption terminal through the first relay mobile terminal or a second relay mobile terminal. According to the data transmitting method, the relay mobile terminal forwards the uplink and downlink data when receiving the same; the uplink data is forwarded by means of the first relay mobile terminal when the low-power-consumption terminal transmits the uplink data to the base station; and when receiving the downlink data transmitted by the downlink data, the low-power-consumption terminal receives the downlink data transmitted by the base station or forwarded by means of the first relay mobile terminal or the second relay mobile terminal. By adopting the data transmitting method and the device, the cost of the data transmitting method and devices can be significantly reduced, and the user plane anchor point migration caused by the relay mobile terminals at the relay mobile terminals can be avoided.

The invention discloses a water-based flexographic printing ink for cigarette tipping paper printing and a preparation method thereof. The water-based flexographic printing ink is composed of a modified acrylic emulsion, pigment and filler, a wetting dispersant, a transfer printing agent, a defoaming agent, deionized water, and a cosolvent. The modified acrylic emulsion is a novel acrylic emulsion formed by copolymerization of an imported high quality emulsifier, acrylate and special functional monomers, and has the advantages of fantastic calcium ion stability, dilution stability, mechanical stability and freeze-thaw stability, and small pollution to the environment. The water-based flexographic printing ink for tipping paper printing provided by the invention is non-toxic and tasteless, has quick drying speed and good dispersion stability, the printing product is free of deformation and edge curling, and has bright color and excellent antibacterial properties. The printing product has few residual monomer and low odor, is green and environment-friendly, the printing ink can be used cooperatively with a flexographic press, the printing speed can reach 250-300m / min, and the machine speed is doubled than the traditional intagliotipping paper printing press, thus greatly improving the production efficiency, and saving the production cost.

The invention particularly relates to a multi-cloud management implementation method based on Liblock. According to the multi-cloud management implementation method based on the Liblock , an open-source Liblock project is adopted as a cloud interface adapter of a multi-cloud management system, interfaces provided by different cloud services for the outside are arranged and abstracted, and a unified API interface for multi-cloud virtualization management is defined; conceptual characteristics shared by different cloud platforms are abstracted to form a series of base classes, and the base classes define basic attributes and general operations of resources, including IDs, names, common attributes, specifications and configuration strategies; and the drivers of the cloud platforms inherit and extend the base classes according to respective service requirements so as to realize more advanced applications. According to the multi-cloud management implementation method based on the Liblock,the problems of multi-cloud unified management and migration faced by enterprise IT are solved, meanwhile, the efficiency of operation and maintenance management personnel is remarkably improved through automatic and intelligent operation and maintenance management, and the cost is reduced.

The invention discloses a bonding wire. The bonding wire comprises a bonding wire base body and three plating layers, wherein the bonding wire base body is coated with the three plating layers; the bonding wire base body is gold-silver-palladium alloy; the three plating layers comprise a gold plating layer, a palladium plating layer and a platinum plating layer from interior to exterior in sequence; and the platinum plating layer is the thickest among the three plating layers. The bonding wire provided by the invention adopts the three-plating-layer structure; the bonding wire is high in antioxidant performance and sulfidation resistance, and the problem of silver migration can be solved as well; the electronically packaged bonding wire is high in subsequent performance stability; and the bonding wire is low in preparation cost, so that the bonding wire can fully replace the gold wire.

The invention relates to the field of soil ecology, in particular to a method for evaluating influences of global changes on agricultural soil animals on the basis of in-situ earth pillar displacement. The method aims to solve the problems that a sample plot treatment area and the sample plot external environment climate are inconsistent and air in the sample plot treatment area does not circulate in an existing method. The method comprises the first step of in-situ soil preparation, the second step of manufacturing of soil animal PVC isolation boxes, the third step of moving of in-situ earth pillars, the fourth step of plant cultivation or vegetation removal, the fifth step of soil temperature and humidity monitoring and the sixth step of sampling and analyzing. According to the method, in the moving process of the in-situ earth pillars, a plough layer and a plough pan are differentiated, it is guaranteed that the layer where the soil animals are most active is located at the same position all the time, communication of the soil animals is blocked through the soil animal PVC isolation boxes, and meanwhile the bottoms of the soil animal PVC isolation boxes are covered with gauze so that normal water and nutrient circulation of soil can be kept.

The invention discloses an azo dibasic alcohol in a symmetrical structure and a preparation method thereof. The invention is characterized in that the azo dibasic alcohol is prepared by carrying out diazotization-coupling reaction on monoamine containing azo dibasic alcohol para-position group R. The structural general formula of the azo dibasic alcohol is disclosed in the specification, wherein the azo dibasic alcohol para-position group R is selected from benzene ring and derivative groups thereof, or naphthalene ring and derivative groups thereof. The azo group is introduced into the main raw material micromolecular dibasic alcohol used in the synthesis process of polyester, polycarbonate, polyether, polyester ether, polyurethane or other polymers in a chemical bonding mode, so that the obtained micromolecular dibasic alcohol molecules contain azo chromophores and also contain two structurally symmetrical hydroxy groups with the same reaction activity, and can partially or wholly substitute micromolecular dibasic alcohol without azo characteristic used in the synthesis, thereby solving the problems of poor migration resistance and nonuniform distribution of azo chromophores in the azo blend material prepared by a micromolecular azo compound blending process.

The invention relates to a spirocyclic phosphate expansive type low-smoke coating flame retardance cellulose textile and a preparation method of the spirocyclic phosphate expansive type low-smoke coating flame retardance cellulose textile. The preparation method is characterized in that a silicone acrylic emulsion (20%-25%) is used as a base stock, a spirocyclic phosphate intumescent flame retardant (30%-40%) and titanium dioxide (2%-3%) are used as high-temperature packing, ammonium molybdate, molybdenum oxide or compounds of the ammonium molybdate and molybdenum oxide is smoke suppression packing (0.1-0.2%), the matters are mixed and ground into a flame retardance coating according to certain proportions, and the flame retardance coating is coated on the surface of the cellulose textile to prepare the expansive type low-smoke coating flame retardance cellulose textile. The spirocyclic phosphate expansive type low-smoke coating flame retardance cellulose textile has the good effects of uniformly and compactly foaming in the initial stage of burning and forming a fire and heat insulation coated carbon layer structure in the later period of burning and the advantages of long burning resistance time, high mechanical strength, good waterproof and weather resistance and smooth coating surface; and a preparation technology is simple in process and convenient in operation. The waterproof material belongs to the category of a water-based paint, has low smoke and low toxicity and belongs to a green environment-friendly coating. The flame retardance coating can be applied to all the cellulose textiles.

The invention discloses a flame retardant polyol composition composed of phosphorus-containing polyol and polyether polyol and further discloses a weight fraction ratio of the polyols. The phosphorus-containing polyol is phosphorus-containing flame-retardant polyol prepared by reacting phosphorus-containing small molecules with an epoxy substance, the viscosity of the phosphorus-containing flame-retardant polyol is 1500-3500 mPa s, and the hydroxyl value of the phosphorus-containing flame-retardant polyol is 400-600 mg KOH / g; the molar ratio of a hydroxyl group of the phosphorus-containing small molecules to an epoxy group of the epoxy substance is from 1:0.8 to 1:1. The invention also discloses a preparation method and application of the flame retardant polyol composition in polyurethanerigid foam. A flame retardant element is introduced into a molecular chain of polyurethane through a chemical reaction, high flame retardancy and stability during application are achieved, the development cost is low, there are no by-products, a process is simple, and the flame retardant performance is high.

The invention relates to a video behavior recognition method based on weighted fusion of multiple image tasks. The video behavior recognition method comprises the following specific steps: 1, constructing an initialized teacher network; 2, downloading and selecting a plurality of pre-training models and parameters of a visual image task common data set in positive correlation with video behavior identification as an initialized teacher network; 3, establishing a multi-teacher video behavior recognition knowledge base; 4, under the guidance of the multi-teacher network with the weight distributed again, carrying out self-supervised training based on comparative learning on the student network; 5, carrying out performance test on the model video behavior identification on the test data set. The method has the advantages that the image task in positive correlation with the video behavior recognition task serving as the target task is used as the teacher task, the training mode of comparison self-supervised learning is adopted, and the video behavior recognition problem under the condition that high-quality video marking samples are insufficient is solved. Therefore, the accuracy of video behavior identification is effectively improved.

The invention discloses a cationic reactive Gemini polyurethane surfactant and a preparation method thereof and belongs to the technical field of fine chemicals. The cationic reactive Gemini polyurethane surfactant is obtained by enabling excess diisocyanate to sequentially react with fatty amine polyoxyethylene ether and a chain extender, further adding a blocking agent to block remaining isocyanate groups, then neutralizing and dispersing in water. A series of surfactants with different performances, uses and unblocking temperatures can be obtained by selecting the types of fatty amine polyoxyethylene ether, the chain extender and the blocking agent. The cationic reactive Gemini polyurethane surfactant disclosed by the invention can solve the problem that the traditional surfactant is easy to migrate and precipitate on the one hand, and improve the compatibility of the cationic reactive Gemini polyurethane surfactant and the traditional surfactant, as well as water resistance, dielectricity, optical transparency and other performances on the other hand; furthermore, the cationic reactive Gemini polyurethane surfactant can realize the effects of strengthening, toughening, reducing surface tension and the like for a matrix, and shows broad application prospects in the fields of preparation of polymer emulsions, finishing of leather and synthetic leather, textile coating and the like.

The invention discloses a wear-resistant and stain-resistant ultraviolet curing PVC (polyvinyl chloride) floor coating. The coating is prepared from the following raw materials in parts by weight: 50 to 70 parts of polyurethane acrylate oligomer, 20 to 50 parts of reactive diluent, 10 to 15 parts of matt powder, 1 to 5 parts of photoinitiator, 0.3 to 5 parts of fluorine-containing hyperbranched polythionocarbamate and 1 to 2 parts of additive. The fluorine-containing hyperbranched polythionocarbamate added in the invention not only reduces the internal stress and curing shrinkage of a system and enhances the adhesive force with a base material, but also improves the crosslinking density, hardness and wear resistance of the coating by introducing a rigid polythionocarbamate structure.

The embodiment of the invention provides a touch panel. According to the embodiment, the touch panel comprises an electric conducting layer and a transparent insulating layer, wherein the electric conducting layer is made of silver-contained conducting materials, the electric conducting layer comprises an offset region, the offset region is filled with the transparent insulating layer, and the transparent insulating layer covers the whole surface of the electric conducting layer. Accordingly, the problem that silver migration exists in an existing touch electrode can be solved.

The invention discloses a fully biodegradable component-toughened PLA composite material and a preparation method thereof. The material is prepared from, by weight, 66-95.9 parts of polylactic acid, 3-15 parts of an alginic acid natural polymer, 1-18 parts of vegetable oil or derivatives thereof and 0.1-1.0 part of an alkaline catalyst. The preparation method comprises the following steps of drying the components, conducting blending and granulating in an internal mixer, then putting granules into an extruder for extrusion, and performing injection molding by an injection molding machine. Thecomposite material has the advantages that the production cost is low, the material is biodegradable, a plasticizer is unlikely to permeate and migrate, no pollution is caused, a good toughening effect is achieved, and the mechanical property is excellent.

The invention provides a spray-seeding revegetation method for riverbeds in a high elevation region, and relates to the technical field of sand prevention and fixation. The method comprises the stepsthat 1, construction is prepared in dry season of a river; 2, before spay-seeding construction, the construction region is prepared, the to-be-constructed region is leveled, and garbage is removed; 3,a sand-fixation substrate is spray-seeded, where in 15-40% by volume of deep clay soil, 20-35% by volume of humic acid, 0.1-2% by volume of pellet agent, 0.5-3.0% by volume of polymer binder, 30-45%by volume of wood meal, 5-10% by volume of distillers' grains, 3-5% by volume of organic fertilizer and 0.4-2.5% by volume of seeds are mixed to be uniform to be prepared into the sand fixation substrate, and the sand fixation substrate is put into a spray-seeding machine and sprayed out uniformly; 4, the spray-seeding thickness is 2-3 cm, and the spray-seeding thickness is uniform. Accordingly, the sand fixation substrate has the advantages of being resistant to long-time water erosion and periodical hydrodynamic force, high in capacity of resisting wind erosion, high in fixed capacity, highin vegetation survival rate, small in preservation difficulty and low in cost.

The invention provides a message forwarding method and device. When source MAC addresses of multiple downlink devices are the same, the method includes the following steps: when a first message sent by the downlink devices to an uplink device is received for the first time, acquiring a VLAN (Virtual eXtensible LAN) label of the first message, and creating a first forwarding entry containing a corresponding relationship between the VLAN label and a first output port; acquiring a destination MAC address of the first message, searching for a second output port corresponding to the destination MACaddress, and forwarding the first message to the uplink device from the second output port; and when a second message sent by the uplink device to the downlink devices is received, acquiring a VLAN label of the second message, searching for the first forwarding entry, acquiring the first output port corresponding to the VLAN label, and forwarding the second message to the downlink devices from the first output port. Therefore, according to the message forwarding method provided by the invention, the MAC address migration problem caused by MAC address conflict is avoided, and normal forwardingof the messages can be guaranteed.