177results about How to "Ensure synergy" patented technology

The invention provides an automatic drive vehicle test scene construction method based on traffic accident case deconstruction. The method comprises the following steps of (1) extracting scene elements used for testing an automatic drive vehicle by analyzing characteristics of a real traffic scene; (2) arranging a test scene of the automatic drive vehicle, thereby generating test cases used for testing the automatic driving vehicle; and (3) arranging a test scene collaborative control system. The scene elements and typical features are analyzed and extracted through clustering analysis, and important parameters in the real traffic scene are converted into test parameters in combination with cause analysis, so that an automatic drive urban complex traffic scene safety adaptability test evaluation method suitable for industrial development and third-party certification evaluation is constructed.

An embodiment of the present invention provides an individual user portraying method. The method comprises: based on a label rule library that comprises a label, an attribute, a derivation rule between the label and the attribute, and a logic level value of the derivation rule, detecting a behavior of a user, and applying various types of labels to the user; according to the number and / or timeliness of each type of label applied to the user within a period of time, the attribute derived from the label by using the derivation rule, and the logic strength value of the derivation rule, determining a reference value of each type of attribute derived from each type of label; comparing a reference value of one type of attribute derived from one type of label with a pre-determined threshold, and determining whether it can be determined that user attributes contain the one type of attribute, and if no, determining whether the one type of attribute can be determined together with other labels corresponding to the one type of attribute; and according to a determined user attribute, completing a user portrait. The present invention further provides an individual user portraying system. Precision of user portraits can be effectively improved.

The invention belongs to the field of porous ceramic materials and particularly relates to a gradient-pore silicon nitride and silicon carbide combined film tube and a preparation method therefor. The film tube material is prepared from silicon nitride and silicon carbide, and a gradient filtering structure is formed by a supporting body layer and a surface film layer; a supporting body is formed through combining silicon nitride produced from a reaction with coarse silicon carbide grains and has the average pore size of 10 to 80 microns, the surface film layer is formed through combining the silicon nitride produced from the reaction with fine silicon carbide grains and has the average pore size of 0.1 to 20 microns, and the overall porosity of the film tube is 35% to 50%. The preparation method sequentially comprises the steps of carrying out batching, forming the supporting body, preparing the film layer and carrying out firing, wherein the forming is carried out by adopting isostatic pressing, the forming pressure is controlled to 40MPa to 150MPa, the firing temperature is controlled to 1,400 DEG C to 1,650 DEG C, and the heat preserving time is 3 to 5 hours. The film tube can be used in an oxidative atmosphere, can also be used in a reducing atmosphere, is high in acid-alkali corrosion resistance and can be applied to the filtering and purifying of various high- and low-temperature fluids of coal gasification chemical industry, IGCC and PFBC coal-gasified power generation, high-temperature flue gas, automobile exhaust gas, water purification and the like.

The invention relates to an aero-engine reliability monitoring method based on mixed weibull distribution, and the method comprises the following steps of extracting state monitoring information and performance degradation information of an aero-engine which is already replaced and repaired; extracting a relation between each monitoring parameter and the performance degradation of the aero-engine by utilizing a support vector method, and realizing the monitoring of the performance degradation value of a wing engine; utilizing a degradation model to describe the accumulated degradation volume of the aero-engine on the basis of the monitoring result of the real-time degradation value of the wing aero-engine; estimating a random parameter in a linear degradation model of the aero-engine, and determining the variation of the random parameter and the upper limit and the lower limit of the accumulated performance degradation volume of the aero-engine; establishing an aero-engine reliability monitoring model based on the dual-parameter mixed weibull distribution; utilizing a maximal likelihood method to give an expression of each parameter in the aero-engine reliability monitoring module; estimating hyper-parameters of the aero-engine reliability monitoring module based on the dual-parameter mixed weibull distribution; and calculating the reliability monitoring value of the aero-engine, and realizing the real-time and precise reliability monitoring of the aero-engine.

The invention provides a system for managing warehousing services on a wireless mobile basis. The system comprises a service management terminal, a warehouse operation terminal and a remote inquiry terminal. The invention not only achieves the automatic association and accurate on-line management of multi-dimensional information including 'articles, space, operation and time' in the warehousing services, and supports the full-flow cooperativity in the field operation of warehouses or yards, the unified real-time accurate management of local and non-local multiple warehouses and the real-time service audit and the consistency of logistic information flow, but also guarantees the integrity and confidentiality of system data, and provides the integrated management of data and systems, the cooperative working mechanism of warehouse field operation, and the inquiry mechanism for clients to be informed of the real-time state of logistics, transportation and clearance whenever and wherever possible, so as to meet the requirements for informatization of the current logistics industry and achieve the purpose of the invention.

The invention aims at providing a fiber reinforce plastic (FRP) reinforced concrete-filled steel tube combination column which comprises a steel tube, a hoop rib, an FRP reinforced rib and a longitudinal reinforcement, wherein the hoop rib and the FRP reinforced rib are arranged in the steel tube; the inner wall of the steel tube is provided with fixed angle iron; the end part of the FRP reinforced rib is fixed on the angle iron; the FRP reinforced rib is provided with a hole, and the hoop rib passes through the hole in the FRP reinforced rib; the longitudinal reinforcement is fixed on the hoop rib; the steel tube is filled with concrete. An FRP reinforced rib plate internally provided with the hoop rib and the longitudinal reinforcement is arranged in the FRP reinforced concrete-filled steel tube combination column, and the concrete can be separated again, so that the restraint effect of the concrete is improved, the bearing capacity of the concrete is improved, and the tube wall on the stressed side is effectively prevented from being bended. By adopting a structure of enabling reinforced concrete, the FRP reinforced rib and the steel tube to cooperative work, the FRP reinforced concrete-filled steel tube combination column is simple in structure and convenient to construct, and has the characteristics of being light in weight, high in carrying capacity and good in ductility and shock resistance.

The invention discloses an electric power operation and maintenance remote guidance system. The system comprises a remote server, a smart phone and AR glasses; the smart phone is connected with the remote server and the smart phone; the remote server is provided with a background management system; the background management system is used for storing database information related to power equipmentand an operation and maintenance expert knowledge base and has a power equipment image recognition technology. The remote guidance system has a fault detection operation and maintenance mode and canshoot appearance image information of the power equipment; the name, the model and the fault reason of the power equipment are analyzed through the image recognition technology; and the equipment dataand expert knowledge base are provided. The remote guidance system has a remote assistance mode; a plurality of remote experts can check real-time on-site operation and maintenance scenes and guide on-site operation and maintenance personnel by using characters, images and tracking marks, the operation standard of the operation and maintenance personnel is improved, the working process is standardized, and the operation and maintenance efficiency of the power equipment is improved.

The invention discloses a carbon nano tube / thermosetting resin composite material and a preparation method of the carbon nano tube / thermosetting resin composite material. According to weight, 100 parts of thermosetting resin and 0.25-4 parts of surface modified carbon nano tube are mixed uniformly at a resin melting temperature, so that the carbon nano tube / thermosetting resin composite material is obtained. The surface modified carbon nano tube is as follows: hyperbranched polysiloxane containing a phosphenanthrene structure and an amino is connected on the surface of the surface modified carbon nano tube in a chemical bond manner. Based on the heat resistance of original bismaleimide resin, the prepared composite material has high toughness, high strength, low curing temperature and good flame retardance, and can be taken as a high-performance resin matrix, an adhesive, an insulated paint and the like to be widely applied to such high-tech fields as aerospace, electric products, transportation and the like. The preparation method of the composite material, provided by the invention, has the advantages of wide applicability, good environmental protection, simplicity in operation process and the like.

The invention belongs to the field of bearing defect detection and particularly relates to a bearing ring surface defect detection device based on machine vision, which comprises a disc feeding machine, a belt conveyor, a first station camera adjusting frame, a second station turnover mechanism, a removing mechanism, a third station camera adjusting frame, a tail belt conveyor, a defective productchannel, a third station rotary workbench, a grabbing mechanism, a first station rotary workbench and a pushing mechanism. By means of the photographing, detecting, removing and assembly line type working mode, inferior-quality products can be rapidly and accurately distinguished from the front face, the back face, the side face and the inner ring surface of the bearing ring, the mechanical degree is high, and manpower is omitted.

The invention discloses coenzyme Q-10 / EGF liposome, a preparation method and application. The coenzyme Q-10 / EGF liposome consists of the following components in part by weight: 2.5 to 6 parts of coenzyme Q-10, 3 to 7.5 parts of epidermal growth factor (EGF), 10 to 30 parts of cholesterol, 50 to 80 parts of lecithin and 0 to 0.5 part of vitamin E. According to the coenzyme Q-10 / EGF liposome, phospholipid bi-layer is used as a carrier material, the coenzyme Q-10 and the EGF can automatically coated in the phospholipid bi-layer, so that excipient and plasticizer are avoided; the preparation method is simple; and the coenzyme Q-10 and the EGF have good stability. The coenzyme Q-10 / EGF liposome has remarkable effects of skin aging resistance and repair, and does not destroy the system stability of cosmetics or health-care products when used in the cosmetics or the health-care products; and due to the structure of the liposome, the coenzyme Q-10 and the EGF can be better absorbed by the skin.

The invention relates to an assembled type support and protection structure based on an outer steel arch and an inner concrete plate. The assembled type support and protection structure comprises a steel arch and a concrete support, wherein the concrete support is of a multi-piece arced plate assembling structure; the steel arch is arranged on the outer side of the concrete support; the concrete support and the steel arch are fixed on surrounding rock of a roadway / tunnel through anchor rods. By adopting the composite support and protection structure provided by the invention, the reinforced steel concrete casting and maintenance time is saved on the basis that a relatively large bearing force is ensured, and the support and protection construction speed is greatly increased. By adopting the assembled type support and protection structure, a novel technical way is provided for support and protection of deep well roadways and soft rock roadways, and a novel support and protection methodis provided for the field of roadway / tunnel support and protection.

The invention provides a pavement structure of a cement concrete bridge deck. An epoxy asphalt concrete layer (2) and an SMA13 asphalt concrete layer (3) are arranged above the cement concrete bridgedeck (1) in sequence; the cement concrete bridge deck (1) is cohered with the epoxy asphalt concrete layer (2) by a waterproof bonding layer (4); and the epoxy asphalt concrete layer (2) is cohered with the SMA13 asphalt concrete layer (3) by a bonding layer (5). The scheme of the invention improves the high temperature stability and anti-fatigue property of the bridge deck pavement layer, and obtains complex balance on aspects such as low temperature crack resistance, deformation follow performance, use wear and the like of structure; in the scheme of the invention, the deformation adaptability is strong, and the fatigue life span is also very good; the combination scheme is technologically feasible, and has higher cost performance and the best combination property under the premise of nolarge differences among all indexes.

The invention discloses an automatic landing and recovery system for an unmanned aerial vehicle under the complex dynamic bump conditions. The automatic landing and recovery system utilizes a binocular camera mounted on the unmanned aerial vehicle to position a landing platform, and guides the unmanned aerial vehicle to be landed towards the landing platform; and the landing platform with the adjustable posture is mounted on a carrier, the carrier detects the posture of the unmanned aerial vehicle, the table face posture of the landing platform is adjusted based on the posture of the unmannedaerial vehicle, thus the posture of the landing platform is matched with posture of the unmanned aerial vehicle during landing, the landing process of the unmanned aerial vehicle is more stable and reliable, and the limitation of a traditional unmanned aerial vehicle free landing technology on the landing platform in a stable motion state is relieved. According to the automatic landing and recovery system, the landed unmanned aerial vehicle is further fixed through an electromagnet, thus the unmanned aerial vehicle is parked firmly and does not fall along with movement of the landing platform,the unmanned aerial vehicle can be released to take off at any time by controlling the electromagnet, and the problem that the unmanned aerial vehicle cannot move stably along with the carrier afterbeing landed is solved.

The present invention relates to a functional gradient material interface reinforcing process for shield tunnel concrete segment. The contact face of the reinforced concrete structure layer and high-impervious protecting layer of shield tunnel concrete segment is the functional gradient material interface, and is characterized by that said interface reinforcing process includes the following several steps: 1), in reinforced concrete segment steel mould pouring high-performance concrete whose strength grade is greater than C50 so as to form reinforced concrete structure layer; 2), making functional gradient material interface reinforcing treatment: on the upper surface of the reinforced concrete structure layer stamping embedded polygonal interface, the included angle of polygonal line of embedded polygonal interface and horizontal plane is 15-65deg; 3), on the embedded polygonal interface adopting pumping process to pour high-performance fine aggregate concrete to upper surface of reinforced concrete segment steel mould so as to form high-impervious protecting layer.

The invention discloses a quaternary ammonium salt antibacterial agent and structural type antibacterial resin. The quaternary ammonium salt antibacterial agent is prepared from dimethylaminoethyl methacrylate and bromotetradecane, which are in the mole ratio of 1: 11, through reacting for 110 minutes at the temperature of 110 DEG C. A preparation process for the quaternary ammonium salt antibacterial agent disclosed by the invention is simple and easy to control, the cost of raw materials is low, and the quaternary ammonium salt antibacterial agent has a very good antibacterial effect on both Escherichia coli and Staphylococcus aureus; and the structural type antibacterial resin prepared from the quaternary ammonium salt antibacterial agent and monomers also has a very good antibacterial effect on both Escherichia coli and Staphylococcus aureus, and the antibacterial performance of the structural type antibacterial resin can reach a level-I antibacterial effect.

Embodiments of the invention provide a method and a system for decomposing a threat dispose strategy in a network. The method comprises the steps of: determining a threat dispose area according to a threat dispose strategy, a network topological structure, a threat feature and an asset feature; determining a candidate dispose object of the threat dispose area and a second linkage relationship setthereof according to the threat feature, a dispose object capability and a first linkage relationship set; decomposing a security guarantee target according to a security guarantee target decomposition mapping relationship, a target priority, a target achievement degree, a target achievement cost and available resources, so as to obtain a security guarantee sub-target of the threat dispose area; and decomposing a dispose command in the threat dispose strategy and / or determining a dispose object according to the candidate dispose object and the second linkage relationship set thereof, the security guarantee sub-target, the dispose object capability, the threat feature, a dispose cost and a dispose effect. Through adoption of the method of the invention, unified management and control for equipment of the whole network, threat differentiated linkage dispose and collaborative response are achieved, and a network management and control capability is improved.

The invention discloses a high-altitude regeneration obstacle clearing device for a power grid, and the device comprises an operation substrate, a clearing mechanism disposed on a control substrate, and a control mechanism disposed at the tail end of the clearing mechanism. The operation substrate comprises a supporting column, a support disposed at the lower part of the supporting column, and a ratchet wheel module which is disposed at the upper part of the supporting column and is connected with the clearing mechanism. An isolation mechanism is disposed between the clearing mechanisms. A ratchet wheel is used for controlling the lifting of a supporting arm, and a working arm is enabled to carry out downward pressing successfully under the action of an electric telescoping rod. After the action of an elastic avoiding ring, a to-be-trimmed branch is sawed off. Moreover, because the device is provided with the isolation mechanism, the device can prevent wood flours from falling onto the whole body of an operator when the operator carries out operation. The device is simple in structure, is simple and convenient for operation, and is worthy of application and popularization.

The invention provides a swaging and limiting device for a track board of a ballastless track of a railway. The device comprises a swaging body of which both ends are respectively swaged on an upper base plate and an lower base plate, and a pull rod which is used for fixing the swaging body, wherein a penetrating hole is formed in the swaging body, a curve groove is formed in the upper end of the penetrating hole, and an opening of which the inner diameter is extended is formed in the lower end of the through hole; the device further comprises a rotating component which is used for matching with the curve groove in a rotary manner, and the pull rod penetrates through an upper hole site of the rotating component and the penetrating hole of the swaging body to be connected with the track board or a base board; and the swaging body is locked by the upper end of the pull rod through a bolt. The swaging and limiting device disclosed by the invention is mounted outside a structure without damaging the track structure, the stress is clear, synergistic reaction between the track board and the base board is ensured, and the mounting, the checking and the exchange of all components are convenient; and after upwarp defect of the ballastless track structure is repaired, the limiting device can also be dismantled to enable the ballastless track structure to restore an original state, and the security and the ride comfort of high-speed railways and the lateral stability of lines are ensured.

Belonging to the field of porous ceramic materials, the invention in particular relates to a pure foam silicon carbide support membrane tube with a three-gradient pore structure and a preparation method thereof. According to the foam silicon carbide support membrane tube, a dual-gradient pore structure pure foam silicon carbide support and a surface film layer form a three-gradient filtration structure, the support is composed of a dual-gradient pore structure pure foam silicon carbide support, the average pore size of the outer layer is 300-500micrometers, the average pore size of the inner layer is 1-3mm, and the support porosity is 35-65%; the surface film layer is formed by combination of silicon carbide powder, the pore size is 50nm-20micrometers, and the film layer porosity is 35%-50%. The preparation method comprises the following steps in order: burdening, foam support molding, support sintering, film layer preparation and firing. The pure foam silicon carbide support membrane tube provided by the invention can be used in oxidizing atmosphere and reducing atmosphere, has strong acid and alkali corrosion resistance, and can be used for coal gasification chemical engineering and IGCC, PFBC coal gasification power generation, high temperature flue gas, automobile exhaust, water purification and other high and low temperature fluid filtration purification.

The invention discloses a preparation method for full carbon fibre composite paper. The method comprises the following steps: pulping plant fibres; performing dipping treatment on carbon fibres with an organic solvent; treating the carbon fibres with a concentrated acid or a concentrated alkali; performing ultrasonic treatment on the carbon fibres which are treated with the acid or the alkali in a first coupling agent; soaking the plant fibres, which are subjected to pulping treatment, with a second coupling agent; adding water and defibering the treated carbon fibres and the treated plant fibres in a fluffer together; adding a dispersing agent into the fluffer and defibering the dispersant and the fibres together; and manufacturing paper with pulp and forming the paper pulp by using a Kothen method automatic paper making system, and squeezing and drying to obtain synthesized fibres; carbonating the obtained synthesized fibres in the environment with the protection of high-temperature nitrogen. The full carbon fibre composite paper prepared by the preparation method has relatively high finished paper uniformly, high mechanical strength, relatively high heat resistance and high electrical conductivity, and solves the difficult problem that the full carbon fibre paper cannot be made by adopting a conventional method.

The invention relates to the technical field of architectural engineering related equipment and provides a surface paint spraying device for a tubular connection part for architectural engineering. The surface paint spraying device aims to solve the problems that paint is sprayed manually during existing paint spraying work, certain harm is generated to human bodies, paint is liable to be sprayedunevenly on a workpiece, automatic paint spraying devices on the market are long in treatment time, equipment is complex, cost is high, clamping operation for pipe fittings is cumbersome, and production efficiency is lowered. The surface paint spraying device comprises a base box and a plurality of support legs installed at the lower end of the base box. Two C-shaped side edge plates are symmetrically installed on the two sides of the upper end of the base box through unit bolt nuts, and a paint spraying chamber is arranged at the upper ends of the two C-shaped side edge plates. A conveying mechanism is arranged between the two C-shaped side edge plates. An electrostatic dust collection mechanism, a paint spraying mechanism and a hot air drying mechanism are arranged sequentially from leftto right in an inner cavity of the paint spraying chamber in the movement direction of the conveying mechanism. The surface paint spraying device is especially suitable for spraying paint for the tubular connection part and has high social use value and application prospects.

The invention discloses a leader-following type multi-aircraft distributed cooperative control method; system control based on a dynamic trigger mechanism is carried out on a multi-aircraft system with a leader aircraft, and comprises the steps: firstly, constructing a multi-aircraft system connection graph with the leader aircraft, representing the connection graph with a directed graph, according to the communication relationship between the leader and followers and between following aircrafts, establishing a control matrix, representing state information of dynamic models of the leader andthe followers in a stacked mode, obtaining the dynamic model used for controlling the flight attitude, designing a local distributed cooperative controller based on a trigger mechanism for each follower, and carrying out cooperative control on the flight state of a local aircraft, so as to make the flight state of the followers in the system to be consistent with that of the leader. The stabilityand the collaboration of the multi-aircraft system are ensured under the condition of reducing the communication among the agents, the burden brought to the system by frequent communication is reduced, and the communication resources are saved.

The invention discloses an architecture management and control system and equipment for informatization construction, and relates to an informatization management and control system and equipment. The invention aims to solve the problems of low data extraction efficiency, low utilization efficiency and the like in an informatization construction process due to the fact that data in different source systems cannot be processed in the current electric power field. According to the system, foreground and background separated development, background interface and foreground modularization are adopted in the technical architecture to embody micro-service application; the system comprises a data layer, an analysis layer and an application layer. The data layer is used for extracting data in a source system to a data center; the analysis layer comprises a knowledge intelligent search module, and the knowledge intelligent search module is used for providing service search, analysis and visualization related service components; and the application layer comprises an application function subunit, and the application function subunit has functions of data storage, calculation and service components through a cloud platform. The system is mainly used for informatization management and control of a power system.

The invention relates to a special biological slow-release compound fertilizer for cotton and a preparation method thereof. The special biological slow-release compound fertilizer for cotton is prepared from the following raw materials: 280-310 parts of urea, 300-350 parts of potassium chloride, 150-200 parts of monoammonium phosphate, 70-120 parts of biological humic acid, 10-15 parts of chelation medium and trace elements, 30-50 parts of double superphosphate, 4-10 parts of sodium borate, 15-75 parts of nano carbon and 0.2-0.5 part of an auxiliary slow-release agent which is polyvinyl alcohol or urea formaldehyde and is selectively used according to different areas. The invention also relates to a preparation method of the compound fertilizer. The special biological slow-release compound fertilizer for the cotton is complete in nutrients; nitrogen and potassium nutrients have slow-release properties; the compound fertilizer can conform to the nutrient absorption law of the cotton, has effects of promoting and regulating growth of the cotton, and is capable of improving cotton yield and fiber quality and effectively reducing occurrence rates of cotton premature senescence and greensickness; the cotton planting benefit is increased; meanwhile, the utilization rate of the slow-release fertilizer is increased.

The invention discloses a method for screening a functional flora. The method comprises the following steps of: 1) selecting a substrate containing a functional flora; 2) inoculating the substrate in a limiting culture medium, culturing and performing subculture; 3) establishing indexes for evaluating the functions of the functional flora, and detecting the indexes and detecting whether a strain composition in the functional flora is stable in the process of the culture of each generation; and 4) thus obtaining the functional flora in the process of the culture of a certain generation if the indexes meet the functional requirements of the functional flora and the strain composition is stable in the process of the culture of the certain generation. The functional flora obtained by the method can continue to keep a synergistic effect among all kinds of bacteria, and has a stable composition and powerful functions, and the action force cannot be weakened because the functional flora is separated from the natural world; and in addition, the method is easy to operate, low in cost, time-saving and labor-saving. Therefore, the method has a broad application prospect in the field of the screening of functional bacteria.

The invention discloses an SCS (steel concrete steel) bridge deck with internal vertical J-shaped connecting structures. The SCS bridge deck comprises a bottom plate, a top plate, N rows of vertical J-shaped connecting structures, and an inter-plate concrete structure made of concrete poured between the top plate and the bottom plate. The vertical J-shaped connecting structures are all cast in the inter-plate concrete structure. The top plate and the bottom plate are integrally connected with the N rows of vertical J-shaped connecting structures through the inter-plate concrete structure. Each row of vertical J-shaped connecting structures comprises a plurality of vertical J-shaped connecting structures distributed from front to rear; each vertical J-shaped connecting structure comprises an upper connector fixed to the bottom of the top plate and a lower connector hooked to the upper connector; the upper connector and the lower connector are both J-shaped hooks. The SCS bridge deck is simple in structure, reasonable in design, convenient to construct, effective to use and good in mechanical property, and the problems in the existing concrete deck can be solved.

The invention relates to an on-line automatic moisture determining system. The on-line automatic moisture determining system comprises: a tray supplying device, which is used for supplying a tray loaded with a sample; a sampling device, which is used for acquiring the sample and placing the sample into the tray; a sample receiving device, which is used for placing a sample tray and completing primary weighing of the sample; at least one moisture determining device, which is used for accurately weighing, drying and determining the moisture of the sample; and a manipulator device, which is usedfor taking and conveying the tray and the sample among the tray supplying device, the sample receiving device and the moisture determining device. The on-line automatic moisture determining system provided by the invention realizes full automation of moisture determination, and can sequentially complete or adjust a sequence to complete the processes of conveying and grasping of sample bottles, theprocesses of supplying of the samples under vibration and weighing and spreading of the samples, the tray-supplying process of supplying of the sample tray, and the moisture-measuring processes of weighing, drying and moisture determination; and the on-line automatic moisture determining system provided by the invention can realize on-line total moisture determination, reduces labor intensity andimproves work efficiency.

The invention provides a wear-resistant polyformaldehyde composite material and a preparation method thereof, and relates to the technical field of high molecular materials. The wear-resistant polyformaldehyde composite material is prepared from the following raw materials: polyformaldehyde, modified glass fibers, an odor adsorption masterbatch, molybdenum disulfide, a lubricant and an antioxidant. The raw materials of the wear-resistant polyformaldehyde composite material are prepared by using the modified glass fibers, the odor adsorption masterbatch and other raw materials, so that the prepared wear-resistant polyformaldehyde composite material has remarkable improvement in wear resistance and maintains excellent mechanical properties; and the wear-resistant polyformaldehyde composite material has low odor characteristics.

The invention provides low-viscosity solvent-free polyurea coating as well as a preparation method and application thereof, and belongs to the technical field of anticorrosive coating. The coating comprises a component A and a component B which are independently subpackaged; the component A comprises the following components in parts by mass: 20-45 parts of polyaspartic acid ester resin, 2-6 parts of silane resin, 15-45 parts of pigment filler and 1.5-5.5 parts of an auxiliary agent; the component B comprises 15-35 parts of a polyisocyanate curing agent, and the mass ratio of the component A to the component B is (2.5-3.8): 1. The polyurea coating comprises the polyaspartic acid ester resin, the silane resin, the polyisocyanate curing agent, the pigment filler and the auxiliary agent with specific content, and the appearance decoration of the coating can be improved by adding the auxiliary agent; due to perfect matching of the specific components and component contents, the low-viscosity solvent-free polyurea coating provided by the invention has excellent mechanical property, corrosion resistance and decoration performance, and can obviously reduce VOC emission.