519results about How to "Play a role in promoting" patented technology

This invention opens a method and system of realization of the online advertising,it aims to solve the problem that the network side can not in accordance with the contents of voice to push the advertising issue for the client. The invention includes: A. voice flow through the client side will be transformed into text flow; B. through keyword matching, matching advertising for the described text flow; C. network side will be pushed matching advertisements to the client side for users to browse. This invention system includes: advertising calling module, advertising basement, lexical analysis module, advertising matching module, advertising push module; Aboved system also includes: speech recognition module, whish is used for voice flow gained by advertising calling module transforming into text flow; text flow memory modules for use in storage of text flow of language recognition module output, to prepare for lexical analysis module called. Through the implementation of the invention, we may push corresponding advertising to the client side, basing on the contents of the voice flow between clients altenantly.

The invention relates to a high-accuracy signal measurement-based frequency difference fast Newton's one-step error reconstructor (FNOSER) imaging method for electrical impedance tomography, which comprises an electrical impedance tomography and an imaging method for high-accuracy signal measurement. The electrical impedance tomography comprises a shell, an electrode array, an excitation module, a measuring module, a central control processing circuit, a universal serial bus (USB) communication module and an upper computer. The imaging method is characterized by comprising the following steps of: (1) acquiring a boundary voltage by using an electrical impedance tomography measuring system when an excitation current frequency is fr, wherein the boundary voltage is taken as a reference voltage Vp; (2) acquiring a boundary voltage by using the electrical impedance tomography measuring system when the excitation current frequency is fm, wherein the boundary voltage is taken as a measuring voltage Vu; (3) computing the Jacobi matrix J of a tested model; (4) substituting a measured value and a computed value into an FNOSER algorithm to compute resistivity distribution; and (5) drawing a resistivity distribution map. The system error of the measuring system can be constrained in the aspect of algorithm, a method which is practical and feasible for determining initial resistivity is disclosed, the resistivity distribution of the tested model can be reconstructed rapidly and correctly and electrical impedance dynamic imaging effect is improved remarkably.

The invention relates to a preparation method of a dried poultry egg. The preparation method is characterized by comprising the following steps of: mixing 70-100 parts by weight of a poultry egg mixed solution, 0.1-2.5 parts by weight of common salt, 0.1-1.5 parts by weight of chicken essence and 0.1-2.3 parts of monosodium glutamate according to a proportion, stirring for 10-15 minutes for uniformly stirring, standing under an environment at the temperature of 0-25 DEG C for 10-30 minutes, then filling into an edible non-sticky plastic mold, placing into a steam cooker, closing the steam cooker, raising the temperature of steam in the steam cooker to 60-90 DEG C within 0-20 minutes by adjusting atmospheric pressure (1.5-2atm) in the cooker, performing heat insulation for 20-30 minutes to form the dried poultry egg of egg white gel with better elasticity and hardness, further performing demolding, marinating and baking on the well formed dried poultry egg, then cutting into small pieces in different shapes and different sizes according to requirements, seasoning, and packaging the well seasoned dried poultry egg with a compound plastic bag. A well packaged product is sterilized through a heat exchange type sterilizer, and then cleaned, cooled, air-dried, boxed and code-printed so as to prepare a final product.

The invention mainly discloses a solar water purifier for lakes and a water purification method thereof. According to the technical scheme, the solar water purifier comprises a main body, a purification system, an energy system, a drive unit, a lighting device and a fixation device. The energy system comprises a solar cell panel, a storage battery and a charging panel. An oxygenation chamber, a disinfection chamber and a purifying chamber are arranged inside the main body. An ozone generator, an air compressor, a bubble generator and an aerator pipe are disposed inside the oxygenation chamber. A drug blending tank is arranged inside the disinfection chamber. A purifier is disposed inside the purifying chamber. When the device operates, installation and pilot run of the device are firstly carried out. After successful pilot run, the device is put into a lake. By mobile positioning of the drive unit, a water body undergoes disinfection, oxygenation and purification. The energy system provides energy. Thus, energy is self-sufficient. The solar water purifier has a simple structure, is low-cost and clean. By various purification methods, purification efficiency is high. By the floating and stationary combined design, position of the device can be controlled freely. Thus, repair rate of water body is high. The solar water purifier is easy to operate.

The invention relates to a full-automatic welding strip cutting bender, which is characterized by comprising an emptying mechanism, a levelling mechanism, a bending mechanism, a cutting mechanism and a box body, wherein one end of the oil-water separator of the bending mechanism is connected with a gas resource, and the other end of the oil-water separator is connected with a cylinder by a pipeline; the cylinder is fixed on a cylinder frame; the cylinder shaft of the cylinder is connected with a bending path frame; the cylinder frame is fixed on a fixed mount on the discharge end of the box body; the lower cutter of the cutting mechanism is fixed on the lower end of the fixed mount; the upper cutter is fixed on an upper cutter frame capable of moving up and down; a motor is connected with one of two eccentric sprockets with same eccentricity, and the eccentric sprockets are fixed on an eccentric shaft by a chain; two eccentric sprockets are fixedly connected with two ends on the bottom of the upper cutter frame via a link block; a small eccentric wheel with a photosenser is fixed in the middle of the eccentric shaft between two eccentric sprockets; and a photo-groove is arranged near the position below the small eccentric wheel. The invention improves production efficiency, lowers labour cost and improves product quality.

The invention relates to a diphasic porous three-dimensional cell culture scaffold which is formed by a coarse fiber phase and a fine fiber phase which are entirely different in diameter. The coarse fiber phase is larger than cultured cells in size while the fine fiber phase is smaller than the cultured cells in size, the coarse fiber phase comprises multilayer coarse fiber structures, each two adjacent coarse fiber structures are arranged according to a certain angle, and the fine fiber phase is individually combined on one side or multiple sides of the coarse fiber phase and is averagely or intensively distributed in hole structures of the three-dimensional cell culture scaffold formed by the coarse fiber phase. In the diphasic porous three-dimensional cell culture scaffold, the fine fiber phase is much smaller than the cells in diameter, so that the cells can attach to nanofibers quite easily, and differentiation of stem cells on the nanofibers can be effectively promoted. Therefore, by means of adding the fine fibers on the three-dimensional cell culture scaffold, cell vaccination efficiency can be improved, and the cells grown on the fine fibers, particularly growth and differentiation of the stem cells, can be promoted and regulated.

The invention discloses a force-induced response dynamic polymer. The polymer chain skeleton contains at least one force-sensitive group and at least one boron-free dynamic covalent bond, optionally contains at least one boron-containing dynamic covalent bond, and also optionally contains at least one supramolecular interaction; and under the action of mechanical force, the force-sensitive group in the dynamic polymer is subjected to chemical and / or physical change to realize force-induced response. According to the dynamic polymer, the force-sensitive group with a force-induced response characteristic, the boron-free dynamic covalent bonds with different dynamic properties, the optional boron-containing dynamic covalent bond and the supramolecular interaction are introduced, so that the force-induced response dynamic polymer material with a wide controllable range, a rich structure and various properties can be prepared. The force-induced response dynamic polymer can be widely appliedas a functional coating with a force-induced response function, a self-repairing material, an energy storage device material, an energy absorbing material, a photoelectric device material, a mechanical probe and the like.

The invention provides a blood pressure and heart rate detection system capable of realizing remote data transmission monitoring. The system comprises a blood pressure and heart rate detection terminal, a universal standard mobile phone or a remote personal computer (PC) with a universal global system for mobile communications (GSM) data transceiver, wherein the blood pressure and heart rate detection terminal can transmit data wirelessly to the remote mobile phone or the remote PC with a universal GSM data transceiver, and receives monitoring and regulation of the remote mobile phone or the remote PC with a universal GSM data transceiver. Meanwhile, the system is provided with a communication interface capable of realizing data transmission, monitoring and regulation with a local PC. The system has the characteristics of no manual intervention, multiple functions, remote range, individuality, networking and humanization, and lays a foundation for realizing that vital signs enter the time of the internet of things.

The invention discloses a chip welding method. The chip welding method includes the steps of firstly, applying solder 32 to the surface of a pad 3 of a substrate 2; secondly, aligning a pad surface 31 of a chip 1 to the pad 3 of the substrate for mounting by a manipulator; thirdly, heating the chip with the chip well mounted to solidify the solder 32 by a reflow oven to complete chip welding. In certain cases, reinforcement is needed to make welding more reliable. The chip welding method is substitutive for traditional chip lead bonding and flip-chip packaging technology, production efficiency is improved, and production cost is decreased.

This invention relates to a control device for digital-controlling and protecting switch appliances, in which, the primary module includes a microprocessor, an on-line programming circuit, a current detecting module includes signal collectng and regulating circuit of a current signal and zero-sequence current signal, a parameter setting input module includes setting of potentiometer, setting of DIP dialing and selecting switch and a key switch, an output drive module includes outputting solid relay drive control, an output display module includes a diode display circuit, and the current signals of the current mutual-inductor and that of the zero-sequence current mutual-inductor are rectified and filtered to be sent to the microprocessor for AD conversion to compute current value, the parameter setting circuit sets the parameter signal and sends it to the microprocessor to be stored and analyzes the collected signals to judge the state of the load and fault to cut the primary circuit by outputting the drive control circuit, the software of the control device includes a primary process and the combination of related sub-process and hardware.

The invention belongs to the field of the programming environment, the mode and the method in the multinuclear parallel program design. The invention provides a visual modeling and code skeleton generating method for supporting the design of multinuclear parallel program for providing support to the software development in an unspecific multinuclear platform system, which adopts the technical scheme that: an imaging user interactive interface is provided, pre-defined building block primitives and an image editing area are provided, wherein each building block primitive is provided with a specific name, attribute, implication and use, and each building block primitive including a main thread primitive, a sub-thread primitive and a thread interactive primitive is provided with different corresponding attribute; the method is also provided with building rules for the combination of building blocks; and the designer can drag the building block primitives to the editing area to perform the design of the multinuclear parallel program according to the analysis result of the demand and the building rule. The method is mainly suitable for supplying programming environment, mode and method.

The invention relates to a beneficial biological bacterium fermented microbial organic fertilizer to solve the problem of harms of organic wastes to the environment. The beneficial biological bacterium fermented microbial organic fertilizer is prepared through fermenting raw materials by beneficial biological bacteria, and the raw materials comprise, by weight, 10-15% of active humic acid, 3-9% of a nitrogenous fertilizer, 1.5-4.5% of a phosphate fertilizer, 1.5-4.5% of a potash fertilizer, 1-3% of a boron fertilizer, 0.5-1.5% of a silicon fertilizer, 0.3-0.7% of an iron fertilizer, 0.3-0.7% of a zinc fertilizer, 0.3-0.7% of a copper fertilizer, 0.2-0.4% of a magnesium fertilizer, 0.2-0.4% of a manganese fertilizer, 0.3-0.7% of a calcium fertilizer, 0.3-0.7% of a molybdenum fertilizer, 0.3-0.7% of a vanadium fertilizer, and the balance of an organic matter ferment material (metered by dry weight). The beneficial biological bacterium fermented microbial organic fertilizer has the advantages of low production cost, soil improvement, improvement of the quality of crop products, improvement of the output of the crops, promotion of development of the agriculture with Chinese characteristics, high harmless degree, absorption facilitation, slow synergism, yield and income increase, soil fertility raising, and balanced nutrition, and is helpful for naturally decomposing various beneficial components in soil after being applied in order to make the decomposed beneficial components be absorbed and utilized by plants.

The invention relates to the field of machine manufacturing, in particular to a tool mechanism used for machining lock cylinders. Full-automatic lock cylinder drburring equipment comprises a vibrating disc, a propelling mechanism, a rotary table, a feeding mechanism, deburring mechanisms and tool clamps. The vibrating disc is placed on a workbench. The feeding mechanism is arranged at the position of a discharge outlet of the vibrating disc. The propelling mechanism is arranged on one side of the feeding mechanism. The tool clamps are arranged on the rotary table at equal intervals. The rotary table is driven by a cam indexer to rotate in an equal angle mode. The deburring mechanisms are further arranged above the tool clamps. According to the full-automatic lock cylinder deburring equipment, rapid feeding, clamping, positioning, three-time deburring and discharging of lock cylinders are achieved, the high-efficiency action takt is utilized for deburring the lock cylinders three times, and high-quality machined surfaces are obtained.

The invention discloses a construction method of building waterproofing engineering. The two ends of the bottom of a material uniformizing box are fixedly connected with material guiding inclined plates, connecting frames are symmetrically and fixedly connected to the positions, located on the two sides of the material uniformizing box, of the two side parts of a bottom plate, fixing bolts are fixedly mounted at the tops of the connecting frames, and roller brushes are rotatably mounted at the bottom ends of the connecting frames. By using the material uniformizing box and the material guidinginclined plates, waterproof coating can be evenly discharged downwards, and the situation that the thickness of the waterproof coating smeared on the ground is different due to uneven falling of thewaterproof coating is avoided; by using the roller brushes, the waterproof coating is blocked and prevented from directly falling onto the ground; and the waterproof coating can be evenly smeared ontothe ground through the roller brushes, it is ensured that the waterproof coating is always kept flat, the defect that the proficiency of operators is not high is overcome, direct contact between theoperators and the waterproof coating is reduced, and the situation that the waterproof coating stains the operators and is not easy to clean is avoided.

The invention provides a preparation method of a NiCo2O4 nano-material. The method comprises steps as follows: (1) Ni(NO3)2*6H2O and Co(NO3)2*6H2O are dissolved in a mixed solvent of 1,2-propylene glycol, 1,3-propylene glycol and water, urea is added to the mixture for full dissolution, and a mixed solution is obtained; (2) the obtained mixed solution react in a reaction kettle at the constant temperature for a certain period of time, is washed and is dried, and a NiCo2O4 nano-material precursor is obtained; (3) after the precursor is subjected to constant-temperature heat treatment in air at the temperature of 290-330 DEG C, the NiCo2O4 nano-material is obtained. The invention further provides the NiCo2O4 nano-material prepared with the method as well as an application of the NiCo2O4 nano-material to preparation of a supercapacitor electrode. The NiCo2O4 nano-material is subjected to charge and discharge tests, when the current density is 1 A / g, the specific capacity is up to a higher value, that is, the specific capacity is up to 1820 F / g, after 3,500 times of the charge and discharge tests, the specific capacity is still kept to be higher than 92%, and the NiCo2O4 nano-material can be used as the supercapacitor electrode material.

The invention belongs to the technical field of steelmaking and continuous casting, in particular to a high-temperature slab imaging temperature detecting system in a secondary cooling zone of a continuous casting machine and a temperature detecting method thereof. The system comprises a micro-color CCD camera, a video image acquisition module and an industry computer, wherein the micro-color CCD camera is arranged above the inner arc of the secondary cooling zone of the continuous casting machine and is used for acquiring the two-dimensional image information of a slab; the video image acquisition module is used for receiving and saving the two-dimensional image information; and the industry computer is used for processing and analyzing the two-dimensional image information and displaying a final result. Based on the color video imaging and computer image processing technologies, the method converts the chroma information of pixels in a high-temperature slab color image which is subjected to image preprocessing into temperature information, performs modifying processing on the temperature of the pixel the surface of which is coated by scale, and finally outputs the maximum value and the average value of the temperature. The temperature detecting method has the advantages of simple and convenient operation, high accuracy, quick dynamic response and wide application range, can be easily integrated to dynamic soft press, electromagnetic stirring and dynamic water distribution of secondary cooling, and has wide industry application prospect.

The invention discloses a method for inhibiting tobacco leaf buds, and relates to a method for inhibiting tobacco leaf auxiliary bud growth. The method is as follows: after the tobacco is topped, salt and water are prepared into an aqueous solution according to the mass ratio of 1:8, the aqueous solution is sprayed downwards from the tops of the tobaccos along the tobacco stems, flows to the lower parts of the tobaccos and contacts with auxiliary buds, so that the auxiliary bud young tissues are killed, and the bud inhibiting purpose is realized. According to the method for inhibiting tobacco leaf buds, not only can a bud inhibitor, which is efficient, safe and non-toxic, is not left, is prepared from easily-obtained raw materials and does not pollute, be provided, but also the preparation and use methods are simple and easy to operate, the effect is obvious, the tobaccos are not damaged, and a function of promoting the tobacco leaf production development is obtained. The method is suitable for tobacco leaf cultivation.

A shared bike management system comprises a plurality of parking stalls, a site management platform, a bike reservation platform and a scheduling platform. The site management platform is connected with the bike reservation platform to collect data of the bike reservation platform and control scheduling of the bikes; and the site management platform is connected with the scheduling platform to arrange the scheduling platform for bike scheduling according to current bike and reservation bike conditions of each parking site. A shared bike management method is suitable for the shared bike management system, and comprises the steps of: user bike borrowing and returning reservation planning and user bike returning reservation planning. The user bike borrowing and returning reservation planningcomprises the steps of: inputting bike usage information by a user at a mobile terminal, and matching a bike usage scheme and a bike returning scheme according to the bike usage information by the site management platform; and the user bike returning reservation planning comprises the steps of: inputting bike returning information by the user at the mobile terminal, and matching a bike returning scheme according to the bike returning information by the site management platform.

The invention discloses a animation creation method based on a data base, which includes: collecting materials and data, building an enormous data base, importing a time line into the materials and the data in the data base based on the data base, performing frame compiling and animation render, placing each obtained file into the same file folder according to serial numbers, finally generating a final combination file according to the serial numbers and accordingly finishing animation works based on the animation data base. The animation creation method based on the data base sets a rule of performinganimation creation, leading junior fans who cannot draw to join a big animation-producing family to enjoy fun of animation production.

The present invention relates to a staining kit and its preparation method, staining method and its application in several detection items for detecting canceration cell, red blood cell, campylobacteriosis, vaginal cleaning degree, estrogen level, garlandosus, trichomoniasis, mycosis, diplococcus gonorrhoeae and chlamydi trachomatis on a cervical smear. Said invented kit is formed from fixatino fluid, staining solution and differentiatino solution. Its staining method includes the steps of fixation, staining, differentiation and water-washing. Its film-making speed is quick, only has need oftwo main, and its detection accuracy rate is high, can be up to 98%.

The invention discloses a bidirectional or multi-directional network whiteboard communication platform for synchronous interaction with blackboard writing. In network education, when the teacher writes on the whiteboard, inserts graphics and various materials, the instruction information of any operation and action process of the teacher in the whiteboard is transmitted to the students in real time, and the dynamic synchronous presentation of the students and the teachers is realized. If a student requests blackboard writing on the public whiteboard, the student can use the whiteboard functionto write and perform other operations on the same whiteboard page, including modifying, adding or deleting the existing elements, and the teacher and other students can synchronize in real time as well, with the teacher's permission. After the teacher withdraws the student's blackboard writing right, the teacher may continue blackboard writing or provide blackboard writing to the next student, thus realizing two-way or multi-way blackboard writing interaction. The invention is also applicable to the interactive communication of the network social platform and the network discussion interactive communication of the team, and provides a very effective interactive communication mode for the network communication or the network education.

The invention provides a real scene small object detection method based on a multi-task generation antagonism network, belonging to the technical field of object detection in the computer vision field. The detection method introduces a multi-task generation antagonistic network into object detection, and realizes the establishment of a small object detection network and the completion of the smallobject detection of an image by making the generator network and the discriminator network in the multi-task generation antagonistic network learn from each other in a game mode. The small object detection method overcomes the difficulty of low detection accuracy of the object detection method in the real scene at the present stage, and promotes the application of the object detection method based on depth learning in the real scene.

The invention discloses a step-down DC-DC power supply module remaining service life prediction and health assessment method, and the steps are as follows: 1. establishing a fault information analysissystem by analyzing the failure reasons of overcurrent, short circuit caused by surge strike, thermal shock, vibration and corrosion of a DC-DC power supply module under the influence of electrical over stress and environment stress; 2. inputting corresponding test signals, monitoring output characteristic signal of the step-down DC-DC power supply module and collecting monitoring data for preprocessing, which is used as learning sample data of a SVM; 3. establishing a prediction model of output abnormality of the DC-DC power supply module by the support vector machine, using the collected sample data for training and learning; 4, training errors between the sample data and the prediction result by establishing a time series, and adding the result with the original prediction data; 5. according to the output signal characteristics of the step-down DC-DC power supply module, establishing health state classification; 6. establishing an artificial neural network system to perform original state identification, and using the collected sample data to train and learn; 7. inputting real-time signals into a prediction system, and comprehensively analyzing the results of the support vectormachine model and artificial neural network system modified by the time series. An intelligent algorithm is utilized to perform step-down DC-DC power module fault prediction and health state assessment, the technical threshold of power supply system maintenance guarantee is lowered, and the method has certain engineering practical value.

A multi-language internet information analysis method comprises: (1) data acquisition: determining a data source for data acquisition and searching the data source; (2) data statistics: establishing a large corpus of each language by collecting mass data and establishing an atom character database of each language; (3) data analysis: performing automatic processing on the mass data by adopting an artificial intelligence technology, then obtaining accurate monitored contents through analysis and providing early warning information; and (4) language conversion: main translating a database and an acquired search result in different languages, wherein translated contents are words.

The invention discloses an efficient processing unit for medical waste. The efficient processing unit comprises a material conveying packing auger used for conveying materials, a tearing mechanism used for tearing and smashing paper and plastic bags in the medical waste and a molding mechanism used for extrusion molding of the torn waste; the material conveying packing auger is fixedly installed on a rack, is driven by a gear motor, and is provided with a feeding hopper for feeding and a discharging opening for discharging, wherein the position of the discharging opening corresponds to the tearing mechanism, and the output end of the tearing mechanism corresponds to the molding mechanism. The efficient processing unit has the beneficial effects that the dried waste is input into the tearing mechanism for tearing and smashing, the torn and smashed materials are input into the molding mechanism so as to be extruded into blocks, the size is small, and later-period storage and deep treatment are facilitated.

The invention provides a method for forming a Ti3Al-based alloy thin-wall barrel. The method comprises the following steps of: (1) preparing a barrel blank by using a Ti3Al-based alloy plate with the thickness of between 1.5 and 4 millimeters at the temperature of between 650 and 700 DEG C by a hot rolling and bending method; (2) penetrating and welding a weld in the bus direction of the barrel blank by continuously inputting laser through CO2 so as to obtain a thin-wall barrel; (3) preserving the heat of the thin-wall barrel at the temperature of between 950 and 1,000 DEG C for 1 to 3 hours and cooling the thin-wall barrel along with a furnace; (4) calibrating the thin-wall barrel at the temperature of between 600 and 650 DEG C; and (5) preserving the heat of the thin-wall barrel at the temperature of between 900 and 1,000 DEG C in vacuum for 1 to 2 hours and cooling in the air. Due to the adoption of the method, cracks are effectively prevented in a forming process and deformation resistance is reduced; particularly, the intensity of the weld and a parent metal is lowered by thermal treatment after welding, plasticity is enhanced, and calibration after welding is facilitated and can be performed at a relatively low temperature; simultaneously, the intensity of the barrel is enhanced integrally through final thermal treatment.

The invention discloses a method for obtaining chlorine ion diffusion and combination parameters in a cement-based material. The method only needs a total chlorine ion concentration curve, and can simultaneously obtain a chlorine ion effective diffusion coefficient and adsorption isothermal curve parameters through regression calculation. The method comprises the following steps: obtaining a total chlorine ion concentration distribution curve by a non-steady state diffusion test; trying different combinations of to-be-obtained parameters, calculating to obtain a theoretical total chlorine ion concentration distribution curve; carrying out fitting regression of the theoretical curve and the experimental curve by a nonlinear least square method, to obtain a set of parameter values with the highest fitting degree; calculating the confidence interval of each parameter; and further calculating to obtain an adsorption curve, distribution curves of an apparent diffusion coefficient along with the time and space, and distribution curves of total chlorine ions, combined chlorine ions and free chlorine ions in the time and space. The method not only can obtain the diffusion parameter and the combination parameter, but also can obtain the intervals of the parameters.

The invention discloses a safety authentication method and a remote controller and a television payment system using the same. According to the safety authentication method and the remote controller and the television payment system using the same, a positive authentication request is sent to a payment platform to enable the payment platform to feed back a positive authentication response, and then whether the payment platform is legal is judged according to the positive authentication response, therefore, a fraudulent act of an illegal payment platform is avoided, safety of television payment is improved, popularization of television payment is promoted to a certain degree, and the problems that an existing television payment method is high in safety risk and hard to popularize are solved.

The invention relates to a preparation method of a hollow microsphere silicon dioxide (SiO2) antireflection film, and the method comprises the following steps of preparing the SiO2 sol with concentration of 0.02mol / L to 0.8mol / L, placing nucleating agent into the SiO2 sol under a stirring condition, then adding stabilizer, and stirring and homogenizing the mixture to form the sol. The nucleating agent is polyelectrolyte with number-average molecular weight of the nucleating agent of 2000 to 5000, mutually soluble with water and easy to decompose under the temperature of less than 300 DEG C, and the stabilizer is N, N - dimethyl formamide and N, N - dimethylacetamide. The sol is used for coating a film on a clean glass substrate, after the coated film is dried at the temperature of 70 to 150 DEG C, the coated film is heated to 300 to 500 DEG C to be thermally treated, the heat preserving time is not less than 0.1h, and the SiO2 antireflection film can be obtained. The prepared SiO2 film can reduce the reflection rate of the sunlight, so that the transmission rate of the sunlight can be improved, the photovoltaic conversion efficiency of a solar battery can be effectively increased, and the method is simple, low in cost and remarkable in economic benefit.