236results about How to "Solve the economy" patented technology

The invention provides an intelligent comprehensive monitoring and security integrated management system for a parking garage. The system solves the comprehensive intelligent management problems of related automatic monitoring, automatic detection, display, different languages and voices, communication, dispatching, guide, digital quantity identification, security, forbidding and passing, charging, statistics, self diagnosis and maintenance and the like of various self-propelled and automatic three-dimensional mechanical parking garages. The system has significant meanings for improving the monitoring, security and management levels of various parking garages, promoting static traffic modernization construction and increasing the social and economic benefits of the parking garages.

The invention discloses a method for preparing biodiesel with no byproduct glycerol. The method comprises: mixing a transesterification reagent with animal-vegetable fat; performing reaction at a temperature between 30 and 450 DEG C for 2 to 18 hours, wherein the mass ratio of the transesterification reagent to the animal-vegetable fat is 1:1-30:1; the addition amount of catalysts is 1 to 30 percent of the mass of the animal-vegetable fat; and the pressure in a reactor is 0.05 to 30 MPa; filtering to remove the catalysts; distilling to remove excessive transesterification reagent; and obtaining a product which is biodiesel. The product has no byproduct glycerol. The method has the advantages that the pollution of methanol steam at high temperature is avoided; the catalysts are easy to separate, need no washing and produce no wastewater, thereby providing possibility for the reuse of the catalysts so as to solve heavy technical and economic burdens arising in the prior biodiesel preparation process; and the transesterification of the fat and the novel transesterification reagent can co-produce glycerol as down-stream product which is taken as one of the components of the biodiesel, needs no separation, produces no glycerol byproduct, and improves the utilization rate of raw materials.

The invention relates to a device and method for fire coal management and combustion strategy optimization. At present, a device and method for fire coal management and combustion strategy optimization do not exist, wherein the device and method for fire coal management and combustion strategy optimization can effectively solve the safety problem caused by variable coal quality conditions to a unit. The device for fire coal management and combustion strategy optimization is characterized by comprising a coal quality on-line analysis device, a communication interface, a local monitoring device, a network optical fiber, a first real-time database interface, a real-time database server, a second real-time database interface and a fire coal management and combustion strategy optimization system server, wherein the coal quality on-line analysis device has the function of real-time and on-line measurement on the ash content, the moisture content and the heat quantity of coal, the coal quality on-line analysis device is connected with the local monitoring device through the communication interface, the local monitoring device is connected with the first real-time database interface, and the real-time database server is connected with the fire coal management and combustion strategy optimization system server. The device and method for fire coal management and combustion strategy optimization effectively solve the problem that economy and safety of the unit are reduced due to the fact that the running adjustment mode is poor when coal quality is variable.

The invention provides a dual-motor two-gear drive control system and method. A motor controller of the dual-motor two-gear drive control system is connected with a first motor and a second motor, a vehicle controller analyzes the intention of a driver according to acquired accelerator pedal signals, acquired brake pedal signals and acquired current vehicle speed signals and calculates the target rotating speed and drive torque which meet current vehicle driving requirements, and the motor controller selects torque distribution with the minimum total power loss as the optimal drive torque distribution value between the dual motors by automatically calculating power loss of different drive torque distribution of the motors. Through reasonable matching of the dual motors and two-gear gears, on the premise that the vehicle dynamic property is guaranteed, efficiency of a drive system is effectively improved, and economy is taken into consideration to the maximum degree.

The invention relates to a direct current microgrid, specifically relates to a power pool-based dual-layer bus direct microgrid and a control method therefor, and solves the problems of high energy conversion loss and low system operating efficiency of the existing single-bus direct current microgrid, and high probability of power interference and poor system operating economy of the existing dual-bus direct current microgrid. The power pool-based dual-layer bus direct microgrid comprises an energy storage voltage regulation system, a direct current sub grid I and a direct current sub grid II, wherein the energy storage voltage regulation system comprises a power pool, a lithium battery pack, a DC/DC converter I, a DC/DC converter II and a DC/DC converter III; the power pool comprises a supercapacitor and a middle bus in parallel; the direct current sub grid I comprises a photovoltaic power generation unit I, a direct current load I and a direct current bus I; the direct current sub grid II comprises a photovoltaic power generation unit II, a direct current load II and a direct current bus II; and the direct current sub grid I and the direct current sub grid II have different voltage levels. The power pool-based dual-layer bus direct microgrid is applicable to a variety of fields.

The invention provides a method for purifying piggery fermentation wastewater by using Chlorella, which comprises the following steps: (1) pretreating piggery fermentation wastewater, and adjusting pH to 6.5-7.5 and wastewater concentration in an adjusting tank; (2) acclimating and culturing Chlorella in wastewater to ultimately obtain a Chlorella strain which can rapidly grow in 50-70% (v/v) wastewater; (3) inoculating the acclimated Chlorella strain into wastewater, and culturing in a closed type photobioreactor; and (4) collecting Chlorella, and thus finishing wastewater treatment. The method of the invention uses Chlorella with high adaptability to purify piggery fermentation wastewater, can remove TN, TP and COD in wastewater, and solves the problem that in the prior art, the piggery fermentation wastewater is treated in an uneconomic traditional method or directly discharged to cause environmental pollution. In addition, the collected Chlorella can be used for other purposes to generate certain economic benefits.

The invention provides a microgrid capacity allocation optimization method considering risk losses. The method includes obtaining parameters, and fitting out the probability distribution function of wind, photovoltaic and load power; constructing wind-photovoltaic-load uncertainty sets of multiple sections, and calculating risk power; constructing a two-stage robust optimization model of power capacity configuration, and performing decoupling into a main problem module and a subproblem model; and utilizing a column and constraint generation algorithm to obtain the optimal configuration of thecapacity of a microgrid. The method can solve the capacity allocation scheme of the microgrid, so that the risk losses of the capacity allocation scheme of the microgrid can be reduced, and the balance problem of economy and robustness can be solved; and the configured microgrid within planning years has good robustness and economy and gives the risk loss range of the scheme, so that the method has reference and guidance values for the future operation mode of the microgrid, and necessary technical support can be provided for the planning work of the microgrid.

The invention discloses a hypersonic flight vehicle aerodynamic configuration based on pre-cooling type combined powder and a working method. The hypersonic flight vehicle aerodynamic configuration based on pre-cooling type combined powder comprises a flight vehicle aerodynamic configuration and a pre-cooling type air turbine rocket engine, wherein the pre-cooling type air turbine rocket engine comprises air inlet channels, a pre-cooling system, an air compressor, an annular combustion chamber, a turbine, an afterburner and exhaust nozzles which are successively connected; the air inlet channels and the lower surface of the front body of the flight vehicle aerodynamic configuration are designed integrally; an adjustable hemicone is arranged at an air inlet end of each air inlet channel; the exhaust nozzles and the lower surface of the rear body of the flight vehicle aerodynamic configuration are designed integrally; and an adjustable cone is arranged in each exhaust nozzle. Medium-altitude and low-altitude working performance advantages of turbine engines are retained, by application of a pre-cooler, it can be ensured that large residual thrust can be provided for a flight vehiclein a transonic/supersonic climbing acceleration process, and therefore, the flight vehicle can climb to a cruise altitude in an accelerated manner within a short time.

The invention discloses a hypersonic aircraft aero-propulsive integrated layout method based on combined power. According to the hypersonic aircraft aero-propulsive integrated layout method, a hypersonic air inlet channel of a dual-mode ramjet passage and a tailpipe nozzle are integrally designed with the front body and the rear body of an aircraft respectively; the dual-mode ramjet passage is taken as a basis; a turbine engine passage, a rocket ejector ramjet passage and the dual-mode ramjet passage are parallelly arranged, so that the three passages can coordinate with one another to work according to the own working conditions under the flight Mach number; the dual-mode ramjet passage and the rocket ejector ramjet passage are parallelly connected in an up-down manner; the turbine engine passage is parallelly connected with the dual-mode ramjet passage and the rocket ejector ramjet passage in a left-right manner; and a dual-engine mode under the left-right side-by-side layout is designed. By adoption of the hypersonic aircraft aero-propulsive integrated layout method disclosed by the invention, the middle-altitude and low-altitude working performance advantages of a turbine engine can be remained; through a rocket ejector ramjet, relatively high residual thrust can be provided in a transonic and supersonic climbing acceleration process of the aircraft; and the climbing acceleration of the aircraft to a cruising altitude within a short time can be achieved.

The invention relates to a method to prepare a polypeptide and in particular relates to a method to prepare C terminal ethylaminated polypeptide, solving the problems of long period in liquid phase synthesis, the use of poisonous reagent in Boc solid-liquid method and high cost in Fmoc method. The preparation method includes the following steps(1)preparing solid pahse carrier; (2)connecting terminal amino acids at the C terminal with the solid pahse carrier; (3) desorbing the amido protecting groups of the amino acids at the C terminal; (4)condensating the second amino acid and the first amino acid at the C terminal; (5)repeating the processes in step(3)and step(4) according to the sequence from C terminal to N terminal of the polypeptide of the derivative thereof to synthesize the polypeptide or the derivative peptide chain e thereof; (6)adding reagent to cleave the peptide resin and purifying through high efficiency liquid chromatography; in this way the target product f is obtained. The method is suitable for producing C terminal ethylaminated polypeptide with low cost and high efficiency.

The invention discloses a Bayer-process red mud foamed concrete blocking block and a preparation method thereof, belonging to the technical field of preparation of foamed concrete blocking blocks, and mainly relates to a Bayer-process red mud foamed concrete blocking block and a preparation method thereof. The Bayer-process red mud foamed concrete blocking block disclosed by the invention comprises the following components in percent by mass: 45%-55% of Bayer-process red mud, 15%-25% of blast furnace water-quenching slag, 15%-20% of cement and 5%-15% of magnesium oxychloride binding material. According to the preparation method, oil sludge sand is used as the main material and is subjected to the process steps of batching, mixing, foaming, strewing, de-molding and maintaining, so as to obtain the foamed concrete blocking block which is high in strength, light in weight and good in thermal insulation effect. Moreover, Bayer-process red mud is sufficiently utilized, so that the waste material is changed into things of value.

The invention discloses a cutting device for an intersecting line of intersecting pipelines of different dimensions. The cutting device for the intersecting line of the intersecting pipelines of different dimensions comprises a supporting device supporting a pipeline to be machined. A support is installed on the supporting device. A template workbench is installed on the support. A motor is installed on the template workbench and connected with a transmission main shaft. A cross rod is fixedly connected to the transmission main shaft. The cross rod is sleeved with a guide sleeve. The guide sleeve is connected with a cutting torch support through a compression spring. The cutting torch support is connected with a cutting torch. A template is arranged on the lower side of the template workbench. The template is provided with an arc concave face identical with the pipeline to be machined in radius. When the pipeline to be machined needs to be cut, the cutting radius is adjusted through a locking device, the template is adjusted to be at an appropriate height, the top end of the cutting torch support is located on the arc concave face, the motor is started, and the pipeline to be machined is cut through the cutting torch. The cutting device can machine the intersecting line of the intersecting pipelines of different dimensions through a female die, the profile of the female die is easy and convenient to machine, and the cutting device for the intersecting line of the intersecting pipelines of different dimensions has the advantages of being high in machining quality, low in production cost and the like.

The invention discloses a chlorpyrifos pesticide-degrading bacterium which refers to a Hu-01strain pertaining to Cladosporium sp. The preservation number of the strain is CCTCC M207111, and a Genebank accession number of the ITS sequence analysis is EF405864. Meantime, the invention discloses a method of preparation of inocula. The invention has the advantages of low production cost of inocula, convenient operation and good degradation effect. The invention is suitable for being widely used in fruit and vegetable production and export bases in China or in places possessing green food trademark, which has great significances in promoting the production of uncontaminated vegetable and green food.

The invention provides a micro-grid system based on VACON industrial inverters. The system comprises a power supply unit module containing a unified convertor device, a convertor module and a PLC-based central monitoring and scheduling module. The power supply module of the system comprises a wind power supply unit, a photovoltaic power supply unit and an energy storage power supply unit with two-way power flow. As all power convertor devices of the micro-grid system are based on the VACON industrial inverters having a secondary development function, the universality and maintainability of the power supply convertor device and the scalability and secondary development property of protection and control functions are achieved. The central monitoring and scheduling module achieves system operation state monitoring, fault handling and protection, stable operation control, and coordinated optimization scheduling of all the power supply units. The system provided by the invention is conducive to the control of distributed power supplies.

The invention discloses an intelligent hydraulic power plant patrol system and method. The intelligent hydraulic power plant patrol system comprises primary equipment and secondary equipment of a hydraulic power plant, a mobile terminal and a patrol information management system. The intelligent hydraulic power plant patrol method comprises the following steps: recognizing, analyzing and recordingpatrol results of a patrol route and patrol target equipment by using a patrol APP (Application), recording the patrol route, and providing intelligent alarming reminding for situations such as equipment inspection omission and false detection. Therefore, patrol on most hydraulic power plant equipment can be covered with low cost and high intelligence levels, and the technical problems that the patrol process is low in authenticity, economy, convenience and intelligent level can be solved; functions of the system and the method are designed and developed on the basis of application software,built-in programs of conventional device are modified, and an intelligent patrol system is established with relatively low cost; by calling different program modules by application programs, real-timedynamic recognition and acquisition on patrol information of different measuring and control devices can be achieved, and the intelligence degree of the patrol system can be improved.

The invention is a hydraulic engineering device, particularly relating to a conjoined rotary type trash cleaning device, comprising a grid body, a trash cleaning tineharrow system and a support erecting frame; the grid body is composed of vertical grids and beams and is connected with the support erecting frame into a whole; the trash cleaning tineharrow system is driven by electrodynamic force and drives a tineharrow set which is transmitted by rolling chains and rotates around the grid body through a support transmission shaft arranged on the top part of the grid body and chain wheels thereon; and at least two sets of trash cleaning tineharrow systems are arranged on the same grid body in parallel along the horizontal direction. The invention has the beneficial effects of big area of drain grating of single device and strong trash cleaning capability, is suitable for water inlet drain grating of large-scale hydraulic engineering with a wide water inlet, and has trash cleaning effect and efficiency which are both superior to the trash cleaning effect and efficiency of each kind of scraper pan type trash cleaning device.

The invention discloses a production method for producing commercial zinc oxide of a grade of more than or equal to 85 percent from kiln tail and sponge iron and baking-free bricks from kiln head by directly reducing iron-containing zinc ore (slag), reduction coal and lime in a rotary kiln. The process flow of the production method comprises the following steps: raw material preparation, direct reduction in rotary kiln, cooling in cooling kiln, collection at kiln tail and refining pelletizing at kiln head. The required coal particle size is less than 15 millimeters, the particle size of lime is less than 2 millimeters, the coal is burnt by primary air and secondary air, the calcining time is 1.5 to 8 hours, the calcining temperature in the kiln is controlled to be 50 to 1,200 DEG C, materials in the cooling kiln are cooled by water and wind to below a normal temperature of 38 DEG C, the materials are selected and pelletized, the commercial zinc oxide powder is produced at kiln tail, and the commercial sponge iron and baking-free bricks are produced in the kiln head. The method of the invention is simple, energy-saving, emission-reducing, free from waste slag and low in production cost, can produce various products with high quality, represents high degree of mechanization, is favorable for industrial large-scale production, has a large market, is very competitive and environmentally-friendly. The method can create great economic, social and environment-protection effects and solves the economic and technical problems faced by manufacturers of the same industry at home and abroad.

The present invention relates to a fractionating tower for recovery oxygen-containing organics from Fischer-Tropsch synthesis reaction water. It is characterized by that said fractionating tower adopts a specially-designed chimney tray, said chimney tray can ensure the effective separation of water phase and oil phase richly containing oxygen-containing organics. Said invention also provides the concrete structure of said specially-designed chimney tray, and its concrete working principle and concrete operation method.

The invention discloses a method and a device for recycling hydrogen from synthesis ammonia released air and preparing LNG (liquefied natural gas) with a membrane separation and cryogenic integration technology. The method is characterized in that the synthesis ammonia released air sequentially passes through three treatment units as follows: a synthesis ammonia released air pretreatment unit, a membrane separation and hydrogen recycling unit, and an LNG preparation unit with a cryogenic technology. The integration technology utilizes technical advantages of a membrane technology which is small in investment and high in hydrogen recovery rate and doesn't produce depressurized tail gas and technical advantages of the cryogenic technology which can prepare LNG, and simultaneously avoids technical defects that the cryogenic investment is large, the energy consumption is high, and a single membrane or PSA (Pressure Swing Adsorption) technology cannot simultaneously recycle H2 and CH4. By means of the integration technology, the technical problem that the synthesis ammonia released air cannot be economically, conveniently, efficiently and comprehensively utilized is solved; while the hydrogen is recycled, the LNG can be prepared; and a new energy-saving, emission-reduction and efficient technological process route is provided for a synthesis ammonia enterprise, and the integration technology has an excellent application prospect.

The invention discloses a method for quantitatively recovering a lake basin ancient water depth. The method comprises steps that gamma logging and natural gamma ray spectral logging of a randomly-selected well of a to-be-recovered lake basin are carried out; GR values and U values of a pure mudstone interval of a target interval are read; a function relationship of the GR values and the U values is established; a gamma value of a pure mudstone interval of a target interval of each other drilling well is measured, and U values are acquired through calculation; an actual water depth H can be acquired according to a formula H=Hmax*L/Lmax; calculation for each well is carried out, statistics of an actual average water depth value of the target interval of the wells is carried out, a lake basin ancient water depth distribution diagram of the target interval can be made, and lake basin ancient water depth reconstruction is carried out. The method is advantaged in that relative ancient water depth of each interval can be recovered through utilizing natural gamma logging curves (GR curves) of the drilling wells and a natural gamma ray spectral logging curve of a certain drilling well, in combination with deposition rules and actual quantitative calculation, the actual water depth is calculated, and a lake basin ancient water depth plane distribution diagram can be made.

The invention provides a method of preparing nanomaterials in multiple structures from iron-rich low-grade clay minerals. The method comprises the steps of dissolving out octahedral metal ions from the clay minerals using acid to form high-purity SiO2 and an aqueous solution rich in the metal ions, obtaining metal silicate nanomaterials with different patterns through an in-situ conversion-crystallization reaction between SiO2 and the different metal ions under a hydrothermal condition, obtaining two-dimensional layered hydroxide through an in-situ alkali sediment-crystallization reaction of the solution rich in the metal ions prepared by acid dissolution, performing calcining treatment, converting an iron-containing component into magnetic iron oxide, and obtaining the magnetic layered nanomaterial. According to the method, an octahedral and tetrahedral 'splitting-recombination' strategy is adopted for the various minerals in the iron-rich low-grade clay minerals; a technical bottleneck problem in all-component conversion for synthesizing the nanomaterial from the silicate clay minerals precisely, efficiently and economically is solved; and comprehensive and efficient utilizationof all components in the low-grade clay minerals is achieved.

The invention relates to phase-change roof self-insulation ceramsite concrete, and belongs to the technical field of building materials. The problems that existing ceramsite concrete is low in strength property and poor in energy storage effect can be solved. The phase-change roof self-insulation ceramsite concrete comprises, by mass, 30%-40% of cement, 20%-35% of pottery sand, 8.0%-13% of phase-change material, 10%-20% of ceramsite and 5.0%-8.0% of coal ash. The phase-change material uses the ceramsite as a loaded carrier. According to the concrete, the phase-change material is added and loaded onto the ceramsite, hence, a good energy storage effect can be achieved, and a large amount of heat can be stored or released when phase change happens; the phase-change latent heat range is wide, indoor temperature fluctuation is reduced, and cost is lowered; meanwhile, the strength property of the concrete can be guaranteed.

Provided is a configuration method of electric system phasor measuring units. The configuration method of the electric system phasor measuring units comprises the steps that sorting is carried out on vulnerability indexes of nodes in a power grid, the nodes are classified according to the sequence of the vulnerability indexes, configuration of the PMUs is carried out on the basis of the maximum tree principle according to plans of the number of the PMUs, to be configured, in each sub-region, and after configuration of the PMUs meets the requirement for complete observability, the PMU check and installation design is carried out on vulnerability components in the process that N-1 faults happen. According to the configuration method of the electric system phasor measuring units, due to the fact that the maximum tree principle is used for carrying out optimal configuration on the PMUs, the global optimal solution can be obtained rapidly, and the purposes that the PMUs are configured in a phased mode under the condition that observation cannot be carried out, and observability and economy of configuration are ensured at the same time when the N-1 faults happen are achieved; good balance among economy, safety and the time benefit is achieved, the conditions of partial areas, with assembled PMUs, in an existing power grid are taken into full consideration, flexibility is good, and implementation performance is good.

Disclosed are a novel asymmetric azo-based metal complex dye which exhibits superior high color depth a and excellent fatness, preparation thereof, and an acidic black dye composition comprising the same.

The invention relates to a large-scale experiment device capable of simulating natural environment climate condition, wherein no such device with simple structure, good safety and good sealing property exists at present. The device comprises a tank body, and is characterized in that the bottom of the tank body consists of an epoxy mortar wear-resisting face layer with the thickness of 4-6 mm, a waterproof concrete slope-finding layer with the thickness of 300-500 mm, a 8-12 mm thick lime mortar isolation layer, a thick waterproof layer with the thickness of 1.5-2.5 mm, a thick cement mortar leveling layer with the thickness of 18-22 mm, a thick extrusion molding polystyrene plate with the thickness of 140-160 mm, a thick bottom vapor barrier layer with the thickness of 1.5-2.5 mm and a thick reinforced concrete bottom plate with the thickness of 450-550 mm from top to bottom in sequence; and the wall surface and the top of the tank body consist of a steel plate curtain wall surface layer, a rigid polyurethane insulation layer, an inner vapor barrier layer, a reinforced concrete layer, an outer vapor barrier layer and an outer wall coating material layer from inner side to outer side in sequence. The device has the advantages of reasonable design, good safety and good sealing property, low production cost and convenience for maintenance.

The invention discloses an electric vehicle grid-connected optimization scheduling method based on a two-stage preprocessing strategy. The method comprises steps: S1, a power grid model and real-timedata are acquired; S2, a two-stage electric vehicle charging and discharging optimization scheduling model is established; S3, a first-stage model is preprocessed; S4, a weight adaptive particle swarmalgorithm is adopted to calculate the active power output and a unit combination of the first-stage model; S5, the output of the first-stage model is used as input of a second-stage model; S6, the number of charging and discharging electric vehicles optimally burdened by each node in a distribution network layer under network security constraints is considered; S7, whether the corresponding nodevoltage exceeds a limit is judged; S8, the sensitivity of the reactive power change of the node to the voltage is calculated, and network security constraint conditions are added; and S9, optimizationscheduling is ended. Peak clipping and valley filling can be realized, safety and economic hazards brought by a large scale of electric vehicles accessed to the power grid are reduced, the power generation cost of a generator unit is reduced, and the distribution network loss is reduced.

The invention discloses a technology and device for cooling and purifying high-temperature and high-pressure biomass synthesis gas. The technology comprises the following steps of: (1) subsection cooling, namely cooling the high-temperature and high-pressure biomass synthesis gas coming out of a biomass gasifier to 350-550 DEG C by process water, recovering waste heat to produce medium-pressure steam, and after that, cooling the biomass synthesis gas to 100-300 DEG C, and recovering waste heat to produce low-pressure steam; (2) collecting and removing tar; (3) washing and purifying; and (4) treating the biomass synthesis gas by a wet type electrostatic precipitator, wherein the pressure of the treated biomass synthesis gas is 0.1-1 MPa. The device mainly comprises a tube shell type waste heat boiler, a dry-type gas filter, a vertical smoke tube waste heat boiler, a packless venturi scrubbing tower and the wet type electrostatic precipitator. The technology and the device can be used for controlling appropriate technological parameters by the optimal design of the technical scheme, thus realizing subsection cooling of the biomass synthesis gas, cascade recycling of the waste heat, gradual dust removal and the purification target of tar removal. The technology and the device are simple in equipment, smooth in technology, low in energy consumption, high in efficiency, high in safety and stability and good in economic benefit.

The invention discloses pyrethroid pesticide degrading bacteria and a bactericide thereof, belonging to the field of biological high-tech. The adopted strain ZS-S-01 is identified as Stenotrophomonas sp. with the preservation number of CCTCC M 2010095, wherein, the Genbank registry number of the 16S rDNA of the strain is HM016874. The main biological characteristics are as follows: the strain is Gram-negative and has multiple polar flagellum and cells in a short rod shape; and the bacterial colony is milky white and slight yellowish, thicker and non-transparent, the diameter is 0.5mm-1mm, the edge is regular and orderly, the middle part is slightly protruding, and the surface is smooth and bright without wrinkles. The bactericide of the invention has the advantages of low production cost, convenient use and good degradation effect, thus being applicable to the national fruit and vegetable production and export bases or places with green food brand marks at a large area. The bactericide is of great significance to promoting production of nuisance-free vegetables and green food.