374results about How to "Quick restore" patented technology

The invention relates to the technical field of security authentication, particularly to a distributed credibility authentication method and a system thereof based on a software product library. An on-line user initiates an authentication request to an authentication server through an authentication terminal, and the authentication server provides credibility for performing software product authentication as required or authenticating the user software product in distributed form to the on-line user according to the authentication request, and finally returns back the authentication result; an off-line user directly authenticates the credibility of the software product through the authentication terminal, and protects data security and information security of the user by switching among different security levels according to the authentication result or the user choices. In the method and the system provided by the invention, a software credibility authentication mechanism created by two ways of on-line and off-line can implement the credibility authentication of a plurality of security levels for the user so as to ensure the application security and the information security of user computers, and the user is allowed to run any software product at different security levels without any trouble, even the product contains real virus codes, the data security and the system stability of the user computer cannot be destroyed.

The invention relates to a process for continuous steelmaking from a ferriferous material. A molten pool is formed in a steel-smelting furnace at first, and carbonic material and oxygen are insufflated to form foaming slag; the ferriferous material and a fluxing agent are added into the smelting furnace to be molten and reduced, oxygen is insufflated into the molten steel so as to reduce the carbon content in the molten steel, the temperature of the molten steel is risen, and the molten steel is stirred with the generated CO gas; high temperature oxygen or oxygen-enriched air is insufflated and burns with CO gas generated in the smelting furnace; and the molten steel continuously flows into an oxygen blowing furnace through a siphon nozzle, and a small quantity of the fluxing agent is added into the oxygen blowing furnace so that slag formation, desulfurization and dephosphorization are performed, the C content and the temperature in the molten steel are further adjusted through blowing oxygen by an insertion oxygen lance, therefore, the obtained molten steel is directly supplied for an LF refining furnace or an RH refining furnace. The invention has the advantages that the productivity equipment including a suspended pre-reduction furnace, the smelting furnace and the oxygen blowing furnace, the investment for devices and capital construction is saved, the land is saved, the physical distribution is simplified, and the continuous production and the automatic control are facilitated.

The invention relates to a landfill method for rapid stabilization of chromium-containing soil and household garbage. The chromium-containing soil, mineralized waste, anaerobic sludge and kitchen garbage are mixed and filled in the land by a certain way, and then the leachate is subjected to continuous reflux; and 1-2 years after filling, the leachate wastewater can reach discharge standards, so as to achieve stabilization of chromium slag and household garbage.

The invention provides a system restore method, a virtual machine managing device and a system based on a client operating system. The method comprises the following steps: receiving a restore command aiming at the client operating system; suspending the operation of the client operating system after receiving the restore command, wherein the restore command comprises a preset restore point; determining a first memory snapshot and a first incremental file corresponding to the restore point, wherein the first memory snapshot is a memory snapshot of the client operating system created at the time of setting the restore point, and the first incremental file is the incremental file mapped into a first hard disc at the time of setting the restore point; and remapping the first incremental file into the first hard disc, and executing the snapshot restore according to the first memory snapshot. According to the invention, the system can be fast restored.

The invention relates to a method for restoring hexavalent-chromium-polluted underground water by virtue of stable zero-valent iron nanoparticles. According to the method, for preventing the agglomeration of the nanoparticles and prolonging the reaction activities of the nanoparticles, water-soluble polysaccharide (CMC) is utilized as a stabilizer and a dispersing agent to synthesize stable iron-based nanoparticles, so that high dispersity and long reaction activities can be realized, the nanoparticles are effectively transferred to a target pollution source of a heavy metal pollution field by virtue of an injection method, and toxic heavy metal Cr (VI) contained in the nanoparticles is reduced, adsorbed and fixed, so that the transfer capabilities of the nanoparticles in soil and underground water are reduced, and finally an in-situ restoring purpose of the pollution field is realized; the method can be applied to the industries such as electroplating, printing and dyeing, electronic device machining, heavy metal machining and the like, and zero-valent iron and nanometer iron oxide have excellent application prospects in restoring processes of environmental pollutants due to special superiorities and wide decontamination and water purification capacities.

The invention provides a method for preparing a nanocrystal with a core-shell structure. The method comprises the following steps of: (1) mixing a glycol solution containing Au ions and a glycol solution of polyvinylpyrrolidone, heating the mixed solution by microwave radiation, adding ethanol after the solution is cooled, and centrifuging to obtain a gold crystal seed precipitate; and (2) mixing N,N-dimethyl formamide containing Ag ions and N,N-dimethyl formamide of polyvinylpyrrolidone, adding the gold crystal seed precipitate into the mixed solution, heating till boiled, centrifuging to collect precipitate, and cleaning. The invention also provides the nanocrystal prepared with the method. The equipment and the process of the preparation method are simple, safe and universal and have strong operability; and scale production can be realized. Therefore, under the conventional experimental condition, the crystal with a regular crystalline form and a gold-core silver-shell nano-structure can be synthesized in high yield.

The invention relates to a method for selecting and smelting titanium from vanadium titanomagnetite at low temperature, belonging to the technical field of metallurgy. The method comprises the following steps: 1) roasting at the low temperature of 500-1100 DEG C; 2) adding a solid reductant to the roasted product, carrying out reduction smelting at 1100-1300 DEG C, and separating slag and iron torespectively obtain molten iron and titanium slag; carrying out magnetic separation on the titanium slag to remove impurities, thereby obtaining the titanium-rich material; and 4) adding required metal oxide concentrate into a direct-current arc furnace, and directly alloying the molten iron to obtain alloy steel. The smelting method provided by the invention is a brand new smelting method, and changes the existing iron ore selection into titanium ore selection; the pellet is molten and reduced by roasting at low temperature, and the separated molten iron facilitates the addition of ores withdeficient metal elements so as to directly smelt the alloy steel; the titanium slag is subjected to magnetic separation to obtain the titanium-rich material, and the titanium-rich material is furthersmelted to obtain the titanium alloy or titanium metal; and the smelting slag can be used as the raw material for smelting rare earth metals so as to sufficiently and respectively utilize the elements in the ores in one step.

The invention provides an activated carbon loaded compound metal catalyst, a preparation method and application thereof. The catalyst is prepared from a carrier, an active ingredient and an auxiliary, wherein the carrier is activated carbon, the active ingredient is at least one of platinum, palladium and rhodium, and the auxiliary is at least one of iron, zinc, cobalt and copper. The catalyst can be applied to a reaction for synthesizing a corresponding amine compound by catalytic hydrogenation, and has high catalytic activity and high hydrogenation speed, the reduction process is effectively promoted by the using method, and a nitro group influenced by power supply group can be quickly reduced into amino by 100 percent. The catalyst is mild in conditions, good in stability and more in using times in the circular using process.

The invention relates to a method and a device for restoring a virtual machine. The method comprises the following steps of: receiving an incremental data comparing command sent by a backup server by a virtual platform, wherein the incremental data comparing command contains first changing identification information; carrying out snapshot operation on the virtual machine at the current moment according to the incremental data comparing command to obtain second changing identification information; determining a changing data block with data content which is changed in a magnetic disc of the virtual machine according to the first changing identification information and the second changing identification information; and sending block identification information of the changing data block to the backup server to obtain backup data of the changing data block at a moment to be restored by the backup server. The backup server sends the inquired backup data of the changing data block at the moment to be restored to the virtual platform and the virtual platform can restore the content of the changing data block to the moment to be restored. According to the embodiment, the virtual machine can be rapidly restored and the loss of a hard disc is reduced.

The invention relates to a method for preparing a large-area reduced graphene oxide membrane. The method comprises the preparation steps that graphite powder serves as the raw material to prepare a graphene oxide suspension; the graphene oxide suspension is uniformly dispersed on the surface of a substrate in a spray coating or blade coating mode, and a graphene oxide membrane is prepared; the graphene oxide membrane is subjected to reduction treatment under the hot rolling condition, and the reduced graphene oxide membrane is obtained. According to the method for preparing the large-area reduced graphene oxide membrane, rapid heat treatment is conducted under the hot rolling condition, and therefore continuous preparation of the large-area reduced graphene oxide membrane is achieved. The method is convenient to operate, the process is simple and flexible, the production cost of the reduced graphene oxide membrane is greatly reduced, the production efficiency is improved, and the method is suitable for industrial large-scale production.

The invention discloses a photocatalytic electrode responding to visible lights and an application thereof on chromium-containing wastewater treatment. The preparation method of the photocatalytic electrode comprises the following steps: impregnating a TiO2-NTs electrode in a KI solution for 2 to 2.5 hours, taking out the TiO2-NTs electrode, impregnating the TiO2-NTs electrode in an AgNO3 solution with a pH value of 10.5 to 11.5 for 2 to 2.5 hours, washing the prepared electrode with deionized water, drying in the air, then soaking the electrode in a Bi(NO3)3 solution for 0.5 to 1 hour, taking out the electrode, drying in the air, and calcinating the electrode in a muffle furnace for 2 to 2.5 hours so as to obtain the Bi2O3 / AgI / TiO2-NTs electrode. The application of the electrode on a chromium-containing wastewater treatment comprises the following steps: adding wastewater containing hexavalent chromium into a reactor taking the Bi2O3 / AgI / TiO2-NTs electrode as the work electrode and Pt as the counter electrode, adjusting the reaction pH value by using an inorganic acid, stirring in the absence of light so as to ensure the absorption balance on the electrodes, applying a work voltage, and starting a light source to irradiate the system so as to carry out reactions. A photocatalytic electrode responding to visible lights is utilized, at the same time a certain amount of anode deflecting voltage is applied on the electrode so as to treat Cr(VI) through a photoelectric synergetic effect, and the treatment has the advantages of good treatment effect, rapid speed, and low cost.

The invention relates to a lane line map construction method and a construction system. The method comprises the following steps: acquiring location information of the vehicle by using a GPS sensor disposed on the vehicle; identifying a lane line with a camera sensor disposed on the vehicle and outputting lane line curve information; calculating a trajectory of the lane line according to the acquired location information of the vehicle and the acquired lane line curve information; and splicing the acquired trajectories of the lane line to form the lane line map. According to the lane line mapconstruction method based on camera sensor and construction system, the high-accuracy lane line map can be acquired at a lower cost.

The invention discloses a preparing method of monodisperse cuprous oxide hollow submicroballoon with aqueous phase cluster soft mold plates method in preparing technical domain of inorganic functional material, which comprises the following steps: forming cluster with polyvinyl pyrrolidon and dodecyl sodium sulfate; setting the cluster as soft mold plate; mixing water solution of nantokite with water solution of cluster soft mold plate; adjusting pH value; using hydrazine hydrate as reducer; deacidizing copper ion quickly; getting copper-protoxide hollow submicroballoon colloidal solution; making the soft mold plate with the function of controlling outlook and size of particle during reacting course; whizzing; depositing; washing with deionized water and absolute ethyl alcohol; getting copper-protoxide nanometer particle with grain diameter at 11-22 nm; self-assembling; forming monodisperse cuprous oxide hollow submicroballoon with diameter of particle at 400-550 nm.

The invention discloses a mobile terminal and a system restoring method and a system restoring device thereof, and belongs to the technical field of mobile terminals. The system restoring method includes: when detecting that preset backup conditions are satisfied, backing up data of a current operating system at current time point; when the current operating system detects that a first operating system is abnormal, starting a second operating system, and switching the current operating system to the second operating system; acquiring backup data of the first operating system; according to the backup data of the first operating system, restoring a state of the first operating system at backup time point. When one system in dual systems goes wrong, the system going wrong can be quickly and conveniently restored through the other system.

The invention relates to a micron-size nickel phosphide material, as well as a preparation method and application of the micron-size nickel phosphide material. The micron-size nickel phosphide material takes the shape of a hollow sea urchin, and the nickel phosphide is a compound of Ni2P and Ni12P5. The preparation method comprises the steps of synthesizing a ball-shaped Ni simple substance and synthesizing the nickel phosphide. The nickel phosphide synthesized through the method is a sea-urchin-shaped hollow superstructure material, has a very large specific surface area and has a better catalyzing effect on reduction in catalyzing p-nitrophenol, the preparation condition is mild, and the reaction is simple.

The invention relates to a direct reduction method for treating industrial waste slag in a rotary hearth furnace, belonging to a new direct reduction ironmaking process in the metallurgical industry. The main process is: ingredients - mixing - pellets - drying - preheating - reduction - metallized pellets. Metallized pellets with a metallization rate of over 80% can be obtained after reduction in a rotary hearth furnace. The present invention comprehensively recycles and utilizes valuable elements in iron-containing industrial waste residues, economically obtains reducing agent resources, and solves the problem of low falling strength of cold solidified carbon-containing pellets prepared in the process of comprehensive recycling of industrial waste residues It has the advantages of high metallization rate, simple operation, easy control of process conditions, less equipment investment, low production cost, easy to meet raw material conditions, etc., and the overall process is more energy-saving than the furnace smelting process. It is also more environmentally friendly, and more importantly, the method can comprehensively recycle industrial waste, reduce its pollution to the environment, and save energy and protect the environment.

The invention provides a network structure simplification processing method for power distribution network reconstruction specific to the problems of complex power distribution network structure, long result solving time during reconstruction and low power flow calculation speed. A network structure is simplified into a simplified topological structure consisting of a plurality of areas by taking an operable switch in the network structure as a boundary according to the characteristics of the network structure during power distribution network reconstruction, so that a topological reconstruction strategy is generated rapidly under the condition of meeting radial network topological constraint, and the power flow simplification calculation is performed once the topological reconstruction strategy is generated; the calculation speed is increased through a power flow simplification model, an optimal network structure is obtained rapidly, and real-time optimization control of a power distribution network is ensured.

The invention relates to the field of water environment protection, in particular to sulfate reducing bacteria embedded particles for treating ionic rare earth mine wastewater as well as a preparationmethod and an application of the sulfate reducing bacteria embedded particles, and solves the problem that sulfate reducing bacteria in SRB treatment acid mine wastewater are poisoned by heavy metalsand insufficient carbon sources to influence the practical application effect. The embedded particle is of a multi-layer structure and is sequentially composed of a sulfate reducing bacteria biofilmculturing charcoal layer, a composite hydrolase slow-release carbon source layer, an adsorption layer and a cross-linking layer from inside to outside. The invention provides an embedded particle integrated double hydrolysis catalysis system, the release of a slow-release carbon source can be accelerated, an anaerobic environment required by reaction is provided, the toxic action of heavy metals and acid radical ions on sulfate reducing bacteria is reduced, the practical application effect is improved, and sulfate radicals and heavy metal ions in acidic mine wastewater and ionic rare earth mine wastewater can be effectively reduced.

The invention relates to a method in which hematite or limonite are quickly reduced and made into iron powder, which aims to use iron ore difficult to be magnetically separated as a raw material to reduce the cost. The method is characterized in that hematite ore or limonite ore are crushed and then washed and magnetically separated; iron ore powder, coal powder and lime powder are mixed according to the proportion, and calcium fluoride and adhesive are added to be pressed into flans with pores, and the flans are dried; the structure of a kiln car surface is improved, and a sagger is made; the pressed and dried flans are hoisted to the kiln car surface after being put orderly, and the sagger is covered outside the flans; a tunnel kiln is used for calcinating the flans, and two ends of the tunnel kiln are covered with air sealing machines; after the kiln car travels out of the tunnel kiln, a motor hoist is used to hoist the sagger, calcinating blocks are pushed into a water pool to be quickly cooled and automatically ground, and the iron powder and dregs are fished out to directly enter a ball mill to be wetly milled and be pressed into blocks or bagged after the separation of a magnetic separator and the drying.

The invention discloses a linear array structured light three-dimensional rapid measuring device and measuring method, and through utilization of principles of linear array structured light and a look-up table, object surface three-dimensional profile measurement is completely easily, conveniently and rapidly. First a traditional calibration method is utilized to obtain internal parameters and distortion parameters of a camera; linear array structured light images of different spatial heights are collected, and calibration parameters are utilized to perform distortion correction on the images; then interpolation calculation is utilized to obtain a corresponding relation between an image coordinate position and height of each laser ray, and a corresponding retrieval table is generated and stored; the look-up table only needs to be generated once, a relative position of the camera and a light source is kept unchanged, when another object is measured, a user only needs to put the object to be measured on a datum plane, and an image collect is utilized to obtain an image of linear array structure light on the surface on the object to be measured; image processing is utilized to obtain the image coordinate of the laser ray, and depth information of the laser ray can be obtained by directly searching the retrieval table; and thus the three-dimensional profile of the object is rapidly restored.

The invention belongs to the non-ferrous metallurgy field and discloses a method and an electrolytic tank for producing metal titanium through directive electrolysis of titanium dioxide. According to the method, titanium dioxide powder serves as a raw material, liquid metal sodium serves as a cathode reduction medium, the titanium dioxide powder enters the cathode of the metal sodium continuously for a reduction reaction under a joint action of a spirally feeding mode and argon flow serving as a carrier gas, and an electrolytic product is highly purified sponge titanium powder; and oxygen ions are released during the electrolytic process, enter KC1-NaC1 binary mixed molten salt through a stable zirconia solid oxygen permeable membrane of yttrium oxide under the effect of an electric field, transfer to a graphite anode for an electrochemical reaction, and then are discharged. The producing process is capable of producing the metal titanium through direct and rapid reduction of the titanium dioxide powder and producing continuously, high in current efficiency and deoxidation efficiency, strong in regeneration capacity of a reducing agent, simple and suitable for industrial applications.

The invention relates to a low-grade iron ore direct reduction method, which comprises: calculating and taking a certain amount of coal powder, an additive, a binder and water by adopting the dry basis mass of iron ore to be treated as reference; uniformly mixing the taken components, and completely wetting to obtain an internal matching coal; uniformly mixing the internal matching coal and iron ore particles to be treated, and granulating to obtain granulated pellets; directly conveying the obtained granulated pellets into a rotary kiln, carrying out drying, pre-heating, and reduction roasting to carry out coal base direct reduction so as to obtain a reduced material, cooling the reduced material in the absence of air, and carrying out dry magnetic separation to obtain the reduced roasting pellets and the residual carbon; and carrying out treatments such as ore grinding and magnetic separation on the reduced roasting pellets to obtain iron concentrate, or carrying out re-grinding and re-magnetic separation to obtain the reduced iron powder, wherein the obtained residual carbon can be recycled. With the method of the present invention, the low-grade iron ore can be effectively treated, the internal matching coal and the additive are used to granulate, the wet pellets enter the kiln, the coal base direct reduction is performed, the magnetic separation is performed to obtain the high-grade iron concentrate or the directly-reduced iron powder, and the method has characteristics of energy saving, high efficiency, and rapidness.

The invention relates to the technical field of cloud computing, and in particular provides a method and system for self-adaptively connecting a cloud desktop in a virtualization cloud desktop application. By means of the method, the cloud desktop can be self-adaptively kept in connection and reconnected under different connection conditions. The system is a management system used for keeping and managing connection of the cloud desktop and capable of monitoring connection information of the cloud desktop in real time; related configuration of the cloud desktop is adjusted according to a preset strategy; and the cloud desktop at a client side can be recovered or reconnected automatically and rapidly when the connection state is abnormal. According to the invention, by utilizing a caching strategy, session recovery and connection redirecting method, the connection stability of the cloud desktop is improved; the reconnection time of the cloud desktop is shortened; the process is transparent for users; and thus, the user experience can be effectively improved.

The invention discloses a play scene reduction method, a system, a playing terminal and a control terminal. The play scene reduction method comprises steps of receiving play scene obtaining request transmitted by the control terminal of a main playing device, wherein the play scene obtaining request comprises first account information of logging of a target APP, determining whether a record matching with first account information exists in a scene database by the main play device, if yes, transmitting description information of K play scenes contained in the record matching with the first account information to the control terminal, receiving a target scene reduction order transmitted by the control terminal by the main playing device, obtaining the playing parameters of the target play scene from the record according to the description information of the target play scene, and forwarding the playing parameters of the target playing scene from the playing device. The invention can realize the fast reduction of the playing scene and can reduce the control complexity.

The invention discloses a method for leaching and recovering metal from lithium ion battery anode wastes based on an electrochemical method. The method comprises the steps of compacting lithium ionanode waste powder into a flake shape as a negative electrode, adopting an inert electrode as a counter electrode, adopting a solution containing H<+>, K<+> and / or Na<+> as an electrolyte solution, and carrying out electrochemical reduction leaching under direct voltage to obtain an electrolyte solution containing metal ions. Compared with traditional acid leaching (acid plus a reducing agent), according to the method, the acid dosage is greatly reduced, the leaching time is short, the operation can be carried out at normal temperature, the leaching efficiency of metal in a manganese-nickel-cobalt ternary cathode material is greatly improved, the method is simple to operate, and wide in industrial prospect, and the cost is low.

The invention is a process for using passionflower as primary material to produce natural fruit juice flavoring agent, it acquires the solid passionflower frozen fruit juice powder through film condensing and freezing and drying technologies. The soluble solid 12-16 degrees Bx raw pulp is condensed to 30-35 degrees Bx through filtering film, and then they are frozen to -30deg.C--35deg.C for 2-4 hours, the process can reserve the fragrant smell, flavor and nutriment of passionflower raw pulp, the product is convenient to be stored, transmitted and used, it can be used as raw material and additives for beverage, icecream, cake, healthy keeping product and so on.

The invention discloses a molybdenum-containing stainless steel and a smelting method thereof. The molybdenum-containing stainless steel comprises, by mass, 0.023% or less of C, 0.42-0.50% of Si, 1.35-1.45% of Mn, 0.030% or less of P, 0.002% or less of S, 16.55-16.70% of Cr, 10.05-10.15% of Ni, 0.025% or less of N, 2.09-2.15% of Mn, and the balance Fe and residual elements. The smelting method of the molybdenum-containing stainless steel comprises the steps of AOD refining, tapping to ladles, LF refining and continuous casting, wherein the AOD refining step is characterized in that molten iron is added, then molybdena spheres and lime are added to an AOD converter, eight processes of a decarburization reaction are carried out, and finally reduction and desulphurization are carried out. MoO3 reacts with CaO in the AOD converter to form CaMoO4 which has a high melting point and is nonvolatile, the high temperature of the molten iron in the converter can rapidly melt the molybdena spheres, and the elements comprising C, Si, Mn, Fe and the like in the molten iron and a good dynamics stirring condition in the AOD converter are utilized to reduce the molybdena spheres to realize rapid reduction of molybdena and the direct alloyage of the molybdena in the molten iron, so the method has the advantages of low production cost, simple operation and easy control.

The invention relates to the field of icing wind tunnel tests, aims to solve the problems of complex design and high processing difficulty of a wind tunnel three-dimensional ice model, and provides anicing wind tunnel test ice-shaped three-dimensional entity generation method and three-dimensional entity ice. The ice-shaped three-dimensional entity generation method for the icing wind tunnel testcomprises the following steps of selecting physical ice frozen on the surface of a test piece, and selecting a two-dimensional curve which has the largest influence on aerodynamic characteristics ofthe test piece in a specified cross section; determining a stretching boundary section; calculating the scaling of the characteristic parameters of the selected two-dimensional curve at the cross section position of the stretching boundary; drawing a new curve at the cross section position of the stretching boundary according to the scaling ratio; stretching and drawing a three-dimensional entityon the basis of the selected two-dimensional curve and the new curve of the stretching boundary section position; and cutting the three-dimensional entity by using a theoretical shape curved surface of the test piece to obtain a final simulated ice three-dimensional entity. The method has the beneficial effects that the three-dimensional ice model is simplified, and the influence on a result is small when the manufactured solid ice model is applied to a test.

The invention discloses a method for recycling low-grade lead and zinc in pyrite cinder, and belongs to the technical field of ore dressing metallurgy. The method comprises the following steps of: adding pulverized coal and adhesive into the pyrite cinder containing lead and zinc, regulating the moisture, performing wet grinding, pelletizing, drying pellets at a low temperature, performing high-temperature reductive roasting by using gas, collecting dust from the roasting smoke, and thus obtaining lead and zinc mixed concentrate, wherein the roasted pellet ore is an iron-making raw material containing 54 to 60 percent of iron and less than 0.3 percent of lead and zinc. By pelletizing the cinder, carrying out combined reductive roasting with the pulverized coal and the gas and recovering the lead and the zinc from the smoke according to the method, lead and zinc resources which are difficult in lead-zinc-sulfur flotation separation and are greatly lost in the pyrite cinder are efficiently recovered, and the iron resource in the pyrite cinder is also efficiently utilized.

The invention provides a rapid detection method for water-soluble azo dyes in foods. The method comprises the steps of (A), sample extraction; (B), polyamide column concentration and purification; (C), elution of pigments; and (D) qualitative detection. According to the rapid detection method, the rapid screening can be timely and effectively carried out on suspected samples, the method is independent of large-scale instruments and equipments, and lawbreakers can be harshly attacked within the shortest time; and besides, the rapid detection method further has the advantages of short detection time, wide applicable range, high detection accuracy, low detection limit, strong anti-interference capacity and the like.