292results about How to "Meet security requirements" patented technology

The invention discloses a heavy-load precise double-arm manipulator with arms cooperating with each other in a space. The manipulator comprises a linkage guide rail assembly, the load-bearing mechanical arm used for bearing weights and the assistant positioning mechanical arm used for guaranteeing workpiece positioning precision. Because the load-bearing mechanical arm and the assistant positioning mechanical arm can cooperate with each other in the space, it is guaranteed that the whole manipulator structure has high load bearing capacity and also has high positioning precision, the problem of contradiction between the load bearing capacity and precision of existing manipulators is solved, and the requirements for clamping of workpieces with different shapes, high surface precision, high efficiency and high safety performance are met.

The invention discloses a core-shell type ammonium polyphosphate synergetic flame-retardant polyurethane elastic composite material and a preparation method thereof, which is characterized in that the polyurethane elastic composite material containing core-shell type ammonium polyphosphate can be obtained by melting and co-mixing 75-94.9% of polyurethane, 5-25% of core-shell type ammonium polyphosphate and 0.1-5% of synergistic agent at the temperature of 160-220 DEG C for 5-30 minutes by weight percentage. The composite material can ensure that the adding amount of flame retardant is reduced while ensuring the flame retardance effect, and the composite material has good resistance of melt drip, simultaneously improves the shortcoming of poor water resistance of the flame-retardant composite material containing the ammonium polyphosphate, enhances the compatibility of the flame retardant and a polyurethane elastomer and improves the mechanical properties of the material, such as tensile strength, fracture strength and flame retardance performance, thereby meeting the requirements of fire protection safety and engineering applications.

This invention relates to a dynamic random disturbance and cipher-decipher method of the video information characterizing in extracting several key data blocks for disturbance from the video information needing to be ciphered then to recover the disturbed data blocks to the extract position to be mixed with those nonkey data as the ciphered video stream to be output. The de-cipher process is similar to that. The matrix used in disturbance is dynamically generated by pseudo-random sequence, the disturbance matrixes are different to all video frames, security reaches the applied level. This invention can realize standard compressive video information cipher and decipher with hierarchy security.

The invention discloses an agricultural sterilizing composite containing thifluzamide, which is a sterilizing composite containing a first active ingredient thifluzamide, second active ingredients including difenoconazole, hexaconazole, propiconazole, cyproconazole and tebuconazole, and third active ingredients including tricyclazole, isoprothiolane, fenoxanil, Kanamycinum, prochloraz and azoxystrobin, wherein the weight ratio of the first active ingredient to the second active ingredient to the third active ingredient is (1-6) : (1-6) : 6. The sterilizing composite can be applied to controlling rice sheath blight disease, rice false smut and rice blast, and has reasonable ingredients, curing and protecting function, good sterilizing effect, less times of spraying insecticide and lower cost of spraying insecticide. In addition, the activity and the sterilizing effect of the sterilizing composite are not simple addition of the activity of active ingredients, but remarkable synergism isachieved. The invention has good safety on plants, slows down the generation of resistance and meets the safety requirement on agrochemicals.

The invention relates to an antibacterial plastic and a preparation method thereof. The plastic comprises the following components in parts by weight: 70-80 parts of a base material, 3-10 parts of a plasticizer, 0.5-5 parts of an antioxidant, 5-15 parts of compound antibacterial particles, 1-5 parts of a coupling agent, 1-5 parts of a dispersant and 5-10 parts of preservative. The antibacterial plastic can resist bacteria, has a good effect, and can be widely applied to fields of industry, agriculture, foods, medicines and daily necessities.

The invention discloses a nano composite expansion flame retardant polyurethane foamed plastic and a preparation method thereof. The nano composite expansion flame retardant polyurethane foamed plastic is characterized in that the preparation method comprises the following steps: evenly mixing 40 to 80 percent of polyol, 0.1 to 3 percent of foaming agent, 0.1 to 2 percent of foam stabilizer, 0.1 to 2 percent of catalyst, 0.5 to 4 percent of expandable graphite, 0.5 to 9 percent of halogen free phosphate ester or phosphonate ester and 0.5 to 5.5 percent of organic modified nano inorganic filler by weight percentage; and then mixing the mixture evenly with two or more isocyanate polyisocyanate compounds in the weight ratio of 1:2-2:1, and injecting the mixture into a die at 5 to 40 DEG C for foaming. The obtained nano composite expansion flame retardant polyurethane foamed plastic product effectively reduces the heat release rate and the total heat release amount of the material, improves the oxygen index and the vertical firing flame retardant property of the material, reduces the effect of an expansion type flame retardant on reducing the mechanical properties of the material, and meets the requirements of fire safety and project application.

The invention provides a vintage knitted fabric with a surface whitening effect, a finished garment and a processing method of the two. The processing method comprises the following steps: selecting a knitted fabric with a mesh structure on the front side, and carrying out pretreatment on the knitted fabric, wherein the pretreatment comprises the steps of scouring, bleaching and cellulose polishing; carrying out single-side coloring on the pre-treated knitted fabric to obtain finished cloth, wherein the single-side coloring procedure comprises the step of single-side slurry painting of a coating or single-side foam painting of the coating; and washing the obtained finished cloth with water. The invention also provides the vintage knitted fabric with the surface whitening effect and the finished garment obtained by the method. Compared with a traditional fabric production process, the processing method has the advantages that the production processes such as dyeing, soaping and washing with water can be omitted when the whitening vintage effect is displayed, so that the processes are shortened, the cost is reduced, and zero emission in the dyeing process is achieved.

The invention relates to a herbicide composition for preventing and removing farmland weed and an application, in particular to a herbicide used for preventing gramineous weed and broadleaf weed in cornfields, which is a ternary herbicide mixed agent taking nicosulfuron, artrex and sodium sulcotrione as active components. In the composition, the weight ratio of the nicosulfuron to the artrex to the sodium sulcotrione is 1-50:1-80:1-50, preferably 1-10:1-50:1-20. The invention has reasonable components, better preventing effect in comparison with the activity of each component when being applied independently and synergistic action, expands the preventing spectra of the weed, reduces the application frequency, lowers the preventing cost, delays the generation of the resistibility of the weed, has good safety to crops and conforms to the safety requirement of pesticide preparations. The invention has the fresh-weight average preventing effect of 86.19-96.37% to the gramineous weed and the broadleaf weed in the cornfields.

The invention discloses a high-double bond content allyl polyether production method and belongs to the technical field of polyether compound synthesis in organic chemistry. In an anoxic environment, at a temperature of 110-140 DEG C, under catalysis action of an allyl alcohol solution of sodium allylate, allyl alcohol and an epoxy compound are mixed and undergo a reaction, the reaction product is aged and cooled to form an allyl polyether crude product, the allyl polyether crude product and water are mixed, the mixture is neutralized and filtered, and a liquid phase is collected and is allyl polyether. The prepared allyl polyether has molecular weight of 200-8000, double bond content greater than or equal to 98% and a molecular weight distribution coefficient less than or equal to 1.05. In catalyst preparation, an outer circulation reaction vessel with two condensers utilizing a freezing liquid for condensation is used so that a reaction rate is accelerated, an allyl alcohol loss is less than 0.2% and environmental pollution is reduced.

The invention discloses a magnetically-coupled resonant wireless power transmission system parameter design method based on SS topology. In order to solve the problem of over large traditional two-stage charging peak power, when constant current charging of a battery is switched into constant voltage charging, a constant power charging stage is introduced; and meanwhile, in order to ensure safety operation of the system and high efficiency of transmission, input current of a primary resonant network and a phase-shift angle of an inverter are limited, an inductance parameter relationship between two coupled coils is limited respectively by using the three charging stages and the safety operation range, the inductance value range of the two coupled coils is thus determined, a reliable design criterion is provided for the resonant network parameter design, and safety and high efficiency during the battery charging process are ensured. The method of the invention meets requirements of the magnetically-coupled resonant wireless power transmission system for battery full-range charging.

The invention provides a technology and method for preparing solution used for preparing graphene in a liquid phase, comprising the following six steps of: firstly, directly mixing water and alcohol in predetermined proportion, thus the solution used for preparing graphene in the liquid phase can be obtained; secondly, dispersing graphite powder into the solution, thus graphite dispersion is obtained; thirdly, treating by adopting ultrasonic cavitation or jet flow cavitation; fourthly, standing the treated solution, and taking the solution at the upper layer; fifthly, carrying out high-speed centrifugal separation on the solution at the upper layer; and sixthly, collecting supernate at the upper layer after the high-speed centrifugal separation is carried out, thus stable graphene dispersion is obtained. By adopting the solution directly mixed by the water and the alcohol in the invention, the graphene can be prepared in non-toxic pollution-free green solvent with low boiling point, equipment investment is less, raw materials are available, production safety is high, operation is simple and convenient, environmental protection can be realized, yield is considerable, reproducibility is good, and the technology and method provided by the invention are applicable to laboratory study and are also applicable to large-scale industrial production.

The invention relates to a city government hotline data integration platform comprising a unified basic support platform and the service application system of each data source department. The unified basic support platform comprises a basic facility layer, a data resource layer, an application support layer and an application service layer which are arranged from the bottom to the top in turn. The data resource layer acquires the data of all the data source departments. The application support layer performs basic arrangement on the data and acquires the basic data of the data resource layer and then performs the basic service and is used for providing service support to the application service layer. The service application systems establish information interaction channels with the application service layer and realize the application service for the data source departments. Various government affair service hotlines are integrated based on the mayor's open telephone, and the public service hotlines with integration of consulting, service, assistance, supervision and complaint, public opinion analysis and coordinated supervision are established so that various non-urgent appeals of the people put forward to the government apart from urgent alarm are received in a unified way.

The invention discloses a weedicide composition for preventing and removing weeds in cornfield, particularly a weedicide for preventing and removing grassy weeds and broadleaf weeds in cornfield, which is a binary weedicide mixture composed of topramezone and eluthiacet-methyl as active components. The weight ratio of topramezone to eluthiacet-methyl in the composition is (16:1)-(1:8), preferably(8:1)-(1:2). The weedicide composition can be prepared into water-dispersion granulas, wettable powder, suspending agents, dispersible oil suspending agents, missible oil and microemulsion. The weedicide composition is used for preventing and removing weeds in cornfield, contains reasonable components, is superior to the activities of each single component applied independently in the aspect of prevention effect, widens the weed control spectrum, lowers the cost for preventing and removing weeds, slow down the generation of weed resistance, is safe for crops and conforms to the safety requirements for pesticide preparations.

The invention provides an electric lift type storage device, in order to solve the problem of poor safety of an electric lift type device when being applied to civil environment. The electric lift type storage device comprises a top bin (1), a rope belt (8) retracted by a motor, a lifting bin (2) hung in the top bin (1), and a sensor and a bearing plate arranged at the bottom of the lifting bin (2), wherein, the bearing plate (3) is supported or drawn to trigger the sensor and interrupt the operation of the lifting bin, and the articulation position between the rope belt and the lifting bin is provided with a damper used for quickly eliminating the swinging of the box body. When a plurality of devices are arranged in parallel, a driving rod can be utilized to share one motor with an electromagnetic clutch.

The invention discloses a polyurethane reinforced material which is characterized by comprising a component A and a component B, wherein the component A comprises the following components in parts by weight: 20-45 parts of polyether polyol A, 25-55 parts of polyether polyol B, 5-10 parts of polyether polyol C, 5-15 parts of a flame retardant A, 5-10 parts of a flame retardant B, 0.2-0.5 parts of an amine catalyst, 0.1-0.5 parts of a tin catalyst and 0.5-1.0 parts of a foam stabilizer, and the component B is polymethylene polyphenyl polyisocyanate. The polyurethane reinforced material further comprises 3-8 parts of a viscosity reducer. Compared with similar materials, the material has better permeability and higher mechanical property, and broken coal and rock masses can be fixedly combined integrally and effectively due to ultrahigh tensile compressive strength and binding performance, so that the top plate and two uppers can bear pressure actively. The material does not contain poisonous volatile and corrosive matters, so that the material satisfies the demand of safety and environment-friendliness of materials under the shaft.

The invention discloses a bactericidal composition containing cupric nonyl phenolsulfonate and a methoxy-acrylate bactericide. The methoxy-acrylate bactericide is selected from azoxystrobin, kresoxim-methyl, metominostrobin, fluoxastrobin, trifloxystrobin, orysastrobin, picoxystrobin, pyraclostrobin, enostrobilurin, SYP-1620, phenylatestrobin, coumoxystrobin, pyraoxystrobin and pyraclostrobin, wherein the weight ratio of the cupric nonyl phenolsulfonate to the methoxy-acrylate bactericide is 1:5-20:1. The bactericidal composition can be prepared into missible oil, microemulsion, water-dispersible granules, wettable powder and a suspending agent which are permitted in the agriculture. The bactericidal composition containing the cupric nonyl phenolsulfonate and the methoxy-acrylate bactericide is reasonable in ingredients, good in bactericidal effect and low in drug cost, and the activity and the bactericidal effect are not formed by the activities of the ingredient simply. Compared with an existing single preparation, the bactericidal composition has remarkable synergistic effect except the remarkable bactericidal effect, is free of pollution to crops and good in safety, meets the safety requirements of pesticide preparations, and has remarkable preventive and control effect on powdery mildew, downy mildew, anthracnose and banded sclerotial blight of the crops.

The invention relates to a balanced valve bank of a derricking cylinder system. A casting runner, a working port A and a working port B are arranged on a balanced valve body; the balanced valve body is singly connected with one-way valves PF2 and DF1, the one-way valve DF1 is connected with a damper III to form a one-way throttling valve, a control end cover is provided with a control port Px and an unloading port L, the balanced valve body is also connected with a damper IV, an oil tube of the control port Px is connected with a filter screen damper and a damper II, an oil tube of the unloading port L is connected with a damper I; and the dampers I, II and IV as well as the filter screen damper are communicated and matched to form a liquid bridge type control manner. The one-way throttling valve structure effectively solves the problem of loosing of the derricking cylinder produced in China at present. The control end cover is controlled in a liquid bridge manner, which effectively eliminates the phenomenon of joggling of the cylinder because the openness of a balanced valve plug is influenced by pressure impaction. The casting runner reduces the pressure drop and decreases the heating value, therefore, the working efficiency is improved. A one-way valve thread inserting structure is singly inserted into the balanced valve body; and the valve bank can meet the requirements for micromotion, stability and safety in all working conditions.

The invention provides an edge computing-based spinning CPS (cyber-physical system). The CPS comprises a physical layer and an information layer; the physical layer and the information layer are connected through a communication layer so as to interact with each other; the information layer is arranged in a cloud center; the computing and storage resources of the cloud center are distributed to the physical entities of the physical layer in the form of edge computing nodes; the edge computing nodes are connected with the physical entities; the edge computing nodes are also connected with the cloud center through the communication layer; and the sequential real-time tasks of the physical entities are processed through the edge computing nodes. The present invention also provides a real-timetask processing method of the edge computing-based spinning CPS (cyber-physical system). According to the edge computing-based spinning CPS (cyber-physical system) and the real-time task processing method thereof of the invention, the computing and storage resources of the cloud center are distributed to the physical entity attachments by means of an edge computing node mode; on the basis of a principle of ''proximity processing, proximity service'', the real-time performance requirement and security requirement of the spinning CPS can be well satisfied; the security risks of task transmission can be decreased; and bandwidth can be saved. The CPS is suitable for being popularized widely.

The invention discloses a making method of low-acetaldehyde polyester, which is characterized by the following: adopting pure terephthalic acid (PTA) and ethylene glycol (EG) as raw material; adding built additive in the fusing polyetherifying segment, polycondensation segment and solid polymerizing course; selecting built additive from (1) heat stabilizer with phosphor, (2) anti-oxidant, (3) low-molecular weight amino compound, amide compound and polyhydroxy compound.

The invention discloses an insecticidal composition containing pyriminostrobin. The insecticidal composition is characterized in that the active ingredients of the insecticidal composition are pyriminostrobin and a biogenic insecticide abamectin or milbemycins; the weight ratio of pyriminostrobin to the biogenic insecticide is (2:1)-(50:1). The composition can be prepared into agriculturally allowable dosage forms such as suspension concentrates, wettable powder, water dispersible granules, dispersible oil suspension concentrates, microemulsion or emulsifiable concentrates. The insecticidal composition has the advantages that the insecticidal composition has reasonable components and good acaricidal effects; the activity and acaricidal effects of the insecticidal composition are not simple superposition of the activities of the components; compared with existing single preparations, the insecticidal composition has obvious synergistic effects besides obvious insecticidal effects, has good safety to crops and has obvious control effects on Panonychus citfi McGregor, Panonychus ulmi or Tetranychus cinnabarinnum Boisduval.

The invention provides a real-time face recognition system and method. The real-time face recognition system comprises an image acquisition device for obtaining a face image and at least one face recognition device for carrying out face recognition on a face image obtained by the image acquisition device. The image acquisition device and the face recognition device are deployed in different networks respectively. With the system and method, modulation separation is carried out on real-time face capturing and face recognition, so that the requirement on the network bandwidth by real-time face recognition can be reduced substantially; and the security requirement of sensitive data private network protection can be met.

The invention relates to an auxiliary device for a wall-attached frame for construction lifts, and a strengthening method of the auxiliary device. The auxiliary device comprising a standard wall-attached frame (1) is characterized in that the auxiliary device is disposed between a building and the standard wall-attached frame (1). One end of the standard wall-attached frame (1) is connected with a construction lift, and the other end of the standard wall-attached frame (1) is fixedly connected with the auxiliary device, while the other end of the auxiliary device is fixedly connected with a building floor. The strengthening method includes producing large, medium and small auxiliary devices according to attaching space between the building and the construction lift; lifting the auxiliary devices to the building floor to be strengthened and fastening through bolts (7) penetrating the floor; connecting the front end of each auxiliary device to one standard wall-attached frame (1) through connecting steel plates (3), and inserting pins (2) to reliably connect the construction lift with the building. The auxiliary device has the advantages that the problems that during inward contraction of the building structure in the prior art, the traditional standard wall-attached frame applied to the construction lift which is far away from the building is poor in stability and safety are solved.

The invention provides a thrust boosting system for an engine The thrust boosting system comprises a gel propellant accommodating device, an ejector, an igniter, a pipeline, a booster, a flow valve and a central processor, wherein the gel propellant accommodating device is used for accommodating a gel propellant; the ejector is arranged in the thrust boosting combustion chamber or the inner jet tube of the engine, and is used for ejecting the gel propellant; the igniter is arranged in the thrust boosting combustion chamber or the inner jet tube of the engine, and is used for igniting the gel propellant; the pipeline is in fluid communication with the gel propellant accommodating device and the ejector; the booster is coupled on the pipeline, and is used for boosting the gel propellant in the pipeline; the flow valve is coupled on the pipeline and is used for adjusting the flow of the gel propellant in the pipeline; the central processor is electrically connected with the booster and the flow valve, and is used for controlling the boosting value of the booster on the gel propellant and the aperture of the flow valve. According to the system and the method, thrust of the engine can be increased under the condition that an air compressor is not damaged, and the technical problem of instance increase of thrust under a special working condition of the engine is solved.

The invention discloses a gas mixing route acetylene black cracking furnace. The gas mixing route acetylene black cracking furnace comprises a cracking furnace body, wherein the cracking furnace bodyis divided into a gas coke removal section, a cracking primary reaction section, a cracking secondary reaction section, a cooling section and a remaining section from top to bottom, the top of the cracking furnace is provided with a transmission apparatus, and an inner layers of the cracking primary and secondary reaction sections, the cooling section and the remaining section are lined with a refractory material; and the transmission apparatus is a hydraulic cylinder, the hydraulic cylinder is provided with a scraper blade apparatus, a first raw material gas inlet and a second raw material gas inlet, the first raw material gas inlet is connected with an acetylene gas source, the second raw material gas inlet is connected with a mononuclear aromatics gas source, the second raw material gasinlet is provided with a flow valve, and the scraper blade apparatus and the first raw material gas inlet are respectively provided with a water cooling jacket; and the cracking primary and secondaryreaction sections are respectively provided with a thermocouple.

The invention discloses a mite-killing composition containing etoxazole and bifenazate, wherein the weight ratio of the etoxazole to the bifenazate is (30:1)-(1:60), is preferably (10:1)-(1:25) and is more preferably (3:1)-(1:16). The composition can be prepared into a water dispersing particle, a suspension, wettable powder, a dispersible oil suspension, missible oil, an emulsion in water or a microemulsion. The mite-killing composition has reasonable component, good mite-killing effect and low cost of used medicines, achieves the activity and the mite-killing effect not by the simple superposition of all the components, and has obvious synergism. The mite-killing composition takes effect quickly, has long effect-holding period, delays the resistance production, is safe to crops, meets the safety requirement of a pesticide preparation, and has better effect of preventing and treating citrus tree, apple tree and cotton red spiders.

The invention discloses a dust offline sampling system in a closed loop type high-pressure natural gas pipeline, and the dust offline sampling system comprises a sampling subsystem, a dust collecting subsystem, a metering regulating subsystem and a booster power subsystem which are sequentially connected in series through pipelines, wherein the output end of the booster power subsystem is communicated with one port of a return pipeline; the other port of the return pipeline stretches into a high-pressure natural gas pipeline; the sampling subsystem at least comprises a tubular sampling mouth; the dust collecting subsystem at least comprises a dust collector; a control valve group is arranged on a pipeline which connecting the sampling subsystem and the dust collector; the metering regulating subsystem at least comprises a flow transmitter and a flow regulating valve; and the booster power subsystem at least comprises a booster pump so that natural gas samples return to the natural gas pipeline through the return pipeline. By the adoption of the dust offline sampling system, the zero discharge during the process of dust sampling detection in the natural gas pipeline can be realized, and safe and reliable dusting sampling detection process can be ensured; therefore, the dust offline sampling system has the advantage of reducing the environmental pollution.

The invention discloses an insecticidal composition containing spinetoram. The insecticidal composition comprises a first active ingredient of spinetoram and a second active ingredient of methoxyfenozide or ZJ0967, wherein the weight ratio of the first active ingredient to the second active ingredient is 1:20-15:1. The insecticidal composition can be prepared into agriculturally accepted water dispersible granules, suspending agents, oil emulsion, micellar emulsion or aqueous emulsion; the insecticidal composition has reasonable components and a good insecticidal effect and is low in cost, and the activity and the insecticidal effect of the insecticidal composition is not equal to the simple superposition of the activity of all components; and compared with the presently used single preparation, the insecticidal composition achieves an obvious insecticidal effect as well as obvious synergistic action, has high safety and meets the safety requirements of pesticide formulations. The insecticidal composition has quite high insecticidal activity on cnaphalocrocis medinalis guenee, cotton bollworms, prodenia litura and mythimna separate.

The invention discloses a safe and multi-effect seed treatment composition, which comprises the following three active ingredients and an additive in weight percent: 1 to 20% of JS399-19, 1 to 10% of fludioxonil, 1 to 50% of thiamethoxam and the balance of additive. The composition dosage form is a seed treatment microcapsule suspending agent and a suspended seed coating. The safe and multi-effect seed treatment composition provided by the invention has reasonable components, high safety, insecticidal and fungicidal activity, and functions of promoting roots and strengthening seedlings. Compared with the conventional binary or single preparation, the composition has very good bactericidal and insecticidal effects, and also has a significant synergism. The safe and multi-effect seed treatment composition provided by the invention has excellent control effects on seed-borne and soil-borne diseases such as bakanae diseases of rice, take-all diseases of wheat, damping-off of cotton, and root rot of peanuts, seedling pests such as rice thrips, rice plant hoppers and wheat aphids, and soil pests such as grubs, wireworms and mole crickets.

The invention provides an RFID-based public transport vehicle passenger safety monitoring system and method. An RFID detection device is used to collect RFID card swiping data. Through a GPS positioning system, a video monitoring device and a passenger flow monitoring device, vehicle real-time operation data are collected. RFID card swiping data of a data collecting module are received. On and off of passengers are monitored. Public transport operation data of the data collecting module and card swiping records of an on and off monitoring module are received. The real-time operation of public transport vehicles carrying safety monitoring objects is monitored. The system automatically detect abnormal conditions and sends abnormal early warnings to related personnel. The system and the method monitor and manage public transportation of passengers on the basis of an RFID technology to ensure the public transport traveling safety of students and other special passengers.

The invention discloses a topramezone-containing herbicide composition for a corn field. The composition consists of topramezone, mesotrione and atrazine; the weight ratio of topramezone to mesotrione to atrazine is (0.5-40): (1-40): (5-80); the sum of the contents of topramezone, mesotrione and atrazine is 5-85 percent of the total weight of the composition. The composition can be prepared into a suspending agent, water dispersing granules, wettable powder or a dispersible oil suspending agent which is available in agriculture. The components of the composition are reasonable in mixing and an outstanding synergism effect is achieved; the prevention and treatment effect on weeds in the corn field is enhanced, the prevention and treatment spectrum for the weeds in the corn field is expanded, the pesticide application period is prolonged, and the pesticide use cost is lowered; the prepared dose form is high in safety to corns; the composition has a relatively good prevention and treatment effect on grassy weeds and broadleaf weeds in the corn field.