82results about How to "Multiple possibilities" patented technology

The invention discloses a combined material box used in the material charging mechanism of an automatic or semi-automatic cooking device and a material charging method thereof. The combined material box comprises at least one connecting mechanism and two or more material packaging units, wherein, each material packaging unit comprises a floor and a wall extending upwards along the edge of the floor, and one or more material chambers for containing materials are formed in the space inclosed by the floor and the wall; a connecting mechanism is co-operating with the material packaging unit, and an integrated combined material box having a certain space shape is detachably formed; the combined material box has such a structure that each material packaging unit can be installed on the connecting mechanism independently and the material charging mechanism can also takes down each material packaging unit independently from the connecting mechanism and charge material. By using the combined material box of the invention, materials for cooking can be respectively packaged, and then material set can be combined easily and flexibly, corresponding materials can be charged at different proper times quickly and accurately, and the invention has a convenient use and flexible charging modes and is suitable for industrialized garden sauce processing, packaging and turning over.

The invention discloses a method for synthesizing phosphonate ester derivates, comprising: taking one of phosphorous acid esters and one of styrene derivates as reactants, trivalent manganese acetate as a radical initiator, and acetic acid as a solvent, and preparing the phosphonate ester derivates through the reaction at a temperature of between 70 and 90 DEG C; the method improves the selectivity of addition reaction and increases the yield; and has the advantages of simple operation and mild reaction conditions additionally; meanwhile, substrates of the reactants are various, resulting in the diversity of novel structures of phosphonate ester derivates.

The invention discloses a method for carrying out fusion processing on meteorological data and generating a numerical weather forecast, which comprises the following steps: step 1, collecting and receiving various meteorological element data from meteorological observation detection equipment or CCTV to obtain a meteorological element set X1; step 2, performing standardized preprocessing on the acquired meteorological element data to obtain a standardized meteorological element set X; step 3, performing three-dimensional data variation assimilation on the meteorological element set X, performing characteristic error analysis and cross covariance analysis on the data in the meteorological element set X to obtain a covariance error root mean square of each data in the meteorological elementset X, and obtaining an optimal meteorological element data type according to the covariance error root mean square; step 4, performing WRF numerical weather forecast mode compiling according to the optimal meteorological element type; and step 5, performing forecast post-processing on the WRF mode result to generate meteorological element numerical forecast.

The invention discloses a combined material box and a material feeding method thereof for a material feeding mechanism of automatic or semi-automatic cooking equipment. The combined material box comprises at least one connecting mechanism and two or more than two material packaging units, wherein each material packaging unit comprises a bottom wall and side walls, the side walls extend upwards along the circumference of the corresponding bottom wall, a or a plurality of material cavities for loading material are formed in a space which is formed by surrounding the corresponding bottom wall and the corresponding side walls, and the connecting mechanism and the material packaging units are matched, and are detachably combined to form an integral combined material box with the specified space type. By adopting the structure, the combined material box has the advantages that the material packaging units can be detachably arranged on the connecting mechanism, and are independently detached from the connecting mechanism to feed material by the material feeding mechanism; cooking materials can be respectively packaged, material sets can be easily and flexibly combined, the convenience in use is realized, the material feeding type is flexible and diversified, the corresponding material components can be quickly and accurately fed according to different proper cooking opportunities, and the combined material box is suitable for the industrial auxiliary vegetable processing, packaging and turnover requirements.

The invention belongs to the technical field of hydrogel materials, and particularly relates to degradable self-healing chitosan composite aldehyde guar gum hydrogel as well as a preparation method and application thereof. The method comprises the following steps: 1) obtaining a chitosan (CHI) solution; 2) preparing a solution of aldehyde guar gum (AGG); and 3) carrying out a reaction on the solution of aldehyde guar gum with the solution of chitosan to prepare the degradable self-healing chitosan composite aldehyde guar gum hydrogel. According to the preparation method, an aldehyde group on an AGG chain and an amino group on a CHI chain are subjected to a Schiff base reaction to form an imine bond, and the CHI / AGG hydrogel is obtained by taking the imine bond as a cross-linking point. Dueto a dynamic crosslinking mechanism, the hydrogel can realize self-healing within 5 minutes and can be degraded near a neutral environment.

The invention discloses a reconfigurable Terahertz antenna based on a graphene-metal structure and a frequency modulation method. According to the antenna, a novel mixed graphene-metal structure radiating surface is adopted to improve a traditional pure metal antenna, and the mixed graphene-metal structure radiating surface comprises a graphene tuning part and a metal radiating body. According to the antenna, dynamic reconstruction can be carried out by changing the electric field bias of the graphene tuning part of the antenna radiating surface, and the antenna has a low reflection coefficient. In addition, due to the fact that the radiation patch of the antenna reserves a traditional metal material, the radiation performance of a traditional metal antenna is greatly balanced. The provided mixed graphene-metal reconfigurable antenna is expected to enable a gradient plane slot antenna to be used in a higher frequency band, and graphene brings more possibilities and an expansion space for a design and an application of the Terahertz antenna.

The invention relates to a fuse sensor circuit, which comprises an amplifying unit, a fuse, a reference resistance, a switch unit, a latch unit and a shunt resistor. The shunt resistor can be connected in parallel with the fuse when the sensor controlling signal controls the opening of the fuse sensor circuit, so that the shunt resistor can bear more current distribution to ensure that the current flowing through the fuse is not too large. Therefore, the amplification unit parallelly superimposes the current in the fuse and the current in the shunt resistor to obtain a large current input to improve the sensitivity of the sensor circuit. The fuse sensor circuit can reduce the strength requirement for the programming voltage or programming current for fuse programming, and is suitable for relatively low programming voltage or programming current.

The invention discloses a preparation method of a conductive adhesive hydrogel. The method comprises the following steps of: carbon nanotubes are modified by dopamine; the modifiedcarbon nanotubes aregrafted to saccharides containing free carboxyl through an amide reaction; mixing acrylamide, the modified carbon nanotubes and the modified saccharides, and forming the hydrogel under the actions ofa crosslinking agent and an initiator. The modified carbon nanotubes can be stably dispersed in an aqueous solution and form hydrogen bonds with other substances and crosslinks with dynamic supramolecules in the hydrogel; the sugar grafted with the dopamine catechol structure can form a hydrogel network, so that the complexity of the hydrogel structure is improved, and the biocompatibility, the adhesion property and the toughness of the hydrogel are enhanced; the hydrogel has physicochemical properties such as electrical conductivity, self-adhesion, high toughness and biocompatibility. The method can be used for preparing conductive hydrogels in the fields of biomedicine, electronic skin, human-computer interface, human body activity monitoring, wearable electronic equipment and the like.

The invention discloses a complete fiber-optic vector microphone probe. The complete fiber-optic vector microphone probe comprises an optical fiber scalar microphone used for directly measuring the scalar acoustic pressure P of an acoustic signal, a two-dimensional optical fiber vector microphone used for directly measuring two-dimensional orthogonal components of the vector particle vibration speed U of the acoustic signal and a one-dimensional optical fiber vector microphone used for directly measuring the vector particle vibration speed U of the acoustic signal. The outer surface of the periphery of an optical fiber scalar microphone structural body is in a cuboid shape, two adjacent vertical planes of the optical fiber scalar microphone structural body respectively bear the two-dimensional optical fiber vector microphone and the one-dimensional optical fiber vector microphone, each surface of the optical fiber scalar microphone structural body is provided with a groove having the same size as the outer structure of the corresponding two-dimensional optical fiber vector microphone or the one-dimensional optical fiber vector microphone to allow the two-dimensional optical fiber vector microphone or the one-dimensional optical fiber vector microphone to be strictly pasted and inlaid in the two grooves, and the orientations and the positions of the two grooves must ensure thatthe three-dimensional 8-shaped directivity formed by the two-dimensional optical fiber vector microphone and the one-dimensional optical fiber vector microphone meets a Cartesian three-dimensional rectangular coordinate system.

The invention discloses a chiral geminal disilicide alkane compound containing four silicon-hydrogen bonds, shown as a formula VI, and discloses a synthesis method of the chiral geminal disilicide alkane compound. For the first method, in inert gas, a vinyl silane type compound shown as a formula V and silane trihydride shown as a formula IV are used as raw materials; a chiral CoX2-IIP complex compound is used as a catalyst; under the existence of reducing agents, reaction is performed to prepare VI. For the second method, in the inert gas, alkyne shown as a formula I, silane trihydride shownas a formula II and silane trihydride shown as a formula IV are used as raw materials; CoY2, bi(2-diphenyl phosphenyl) ether and a chiral CoX2-IIP complex compound are used as catalysts; under the existence of reducing agents, reaction is performed to prepare a formula VI. The method has the advantages of mild reaction conditions, operation simplicity and convenience, high atom economy, excellentproductive rate (57 to 84 percent), high regioselectivity (greater than 19:1) and high enantioselectivity (91.6 to 98.8 percent ee). The formulas are shown in description.

Methods for managing communications between server devices (30) and customer devices (11,12,13) comprise steps of reading / writing parameters at one of the devices (11,12,13,30) for configuring / monitoring the other one of the devices (11,12,13,30) and, to allow arbitrary parameters to be introduced, comprise steps of, for the parameters, creating attributes comprising extended markup language schemes for defining the parameters. Said one of the devices (30) is linked to a northbound interface (33) and a southbound interface (31,32), the creating step being performed via the southbound interface (31,32). Said one of the devices (30) is linked via the northbound interface (33) to for example a service provider (40) and via the southbound interface (31,32) to for example the customer device (11,12,13). The extended markup language schemes may define types, descriptions of the types, descriptions and / or metadata of the for example non-standardized parameters with names and values. The server device (30) may be an auto configuration server, the customer device (11,12,13) may be a customer premises equipment, the method may be a TR069 protocol.

The invention relates to a preparation method of a single side oxidized cellulose film. The preparation method is characterized by firstly preparing a porous cellulose film by adopting a phase transformation method, soaking the prepared cellulose film in a TEMPO / NaBr mixed solution with a certain pH (10-11), after carrying out treatment for 3-8 hours, immobilizing the cellulose film in molds in different thickness, preparing printing pulp with different NaClO contents to carry out printing treatment on one side of the cellulose film and carrying out washing treatment after reacting for a certain time, thus obtaining the single side oxidized cellulose film. The preparation method has the beneficial effects that the method is simple to operate, is mild in reaction conditions and high in reaction efficiency and is suitable for industrial production; obtainment of the single side oxidized cellulose functional film provides more possibility for functionalization application of the oxidized cellulose film; after being further processed, the single side oxidized cellulose film can be used in the fields of single side electric conduction, medical treatment, barrier films, and the like.

The invention discloses a method for modifying a polydimethylsiloxane material. The method comprises the following steps of: carrying out selective oxidation on carbohydrate containing carboxyl through sodium periodate to obtain oxidized carbohydrate containing active aldehyde groups; grafting dopamine onto the oxidized carbohydrate through amidation reaction by utilizing the reaction of amino andcarboxyl, thereby obtaining carbohydrate containing a catechol structure and an active aldehyde group; then pretreating a polydimethylsiloxane material to expose oxygen-containing groups on the surface of the polydimethylsiloxane material; and connecting bioactive collagen to the surface of the polydimethylsiloxane material by taking oxidized polysaccharide containing the catechol structure as abridge, so as to perform surface functional modification on the polydimethylsiloxane material, thereby obtaining the polydimethylsiloxane material with good and non-temporary hydrophilicity and excellent biocompatibility. Thus, a new way is opened up for preparation of a new generation of biocompatible and hydrophilic polydimethylsiloxane material. The method can be used for preparing biomedical materials.

The invention relates to a seabed submerged floating tunnel structure, and belongs to the technical field of tunnels. The seabed submerged floating tunnel structure comprises a tunnel body, the tunnel body comprises a tunnel main body section, two first tunnel branch sections and two second tunnel branch sections, wherein the two first tunnel branch sections and the two second tunnel branch sections are symmetrically arranged on the two sides of the tunnel main body section correspondingly; the two first tunnel branch sections and the two second tunnel branch sections communicate with the interior of the tunnel main body section; and a bearing mechanism located right below a portal is arranged at one end of the tunnel main body section. The invention further discloses a construction method. The seabed submerged floating tunnel structure and the construction method thereof have the advantages that the structure design is reasonable, in addition, the butt joint mode is simple and effective, tunnel butt joint is realized in a pouring connection mode, the stability of tunnel butt joint is improved, the functions of seabed observation and sealing performance test are added in the construction process, in this way, seabed construction is easy to operate, the accuracy and efficiency of tunnel butt joint are improved, in addition, a very safe construction environment is provided, meanwhile, an escape emergency channel is designed in a whole tunnel, and the overall safety performance of the tunnel is improved.

The invention discloses a data acquisition method for AI commodity recognition training, which relates to the technical field of AI commodity recognition, and comprises the following steps: establishing a shopping scene database, a commodity model database and a model person database; acquiring a camera view background, combining the commodity models retrieved from the commodity model database toobtain at least one combination, and acquiring an image of each combination in the camera view background by a virtual camera to obtain a commodity data set; placing commodities in any 3D shopping scene of the shopping scene database, and setting at least one virtual camera to form a virtual shopping scene; controlling a plurality of model persons in the model person database to simulate shoppingbehaviors in the virtual shopping scene, capturing a visual field image through a virtual camera, and generating a data set; the problems that in the prior art, the AI commodity recognition training data collection process is complex, a large amount of manual labor and energy need to be consumed, the cost is high, and the collection efficiency is low are solved.

The invention discloses a combined motion self-power-generating coat, and belongs to the field of self-power-generating equipment. The power input end of an alternating-current line is located in a bracelet and electrically connected with the power output end of a manual electromagnetic power generator, the power output end of the alternating-current line is electrically connected with the power input end of a rectifier, and the power input end of a positive wire and the power input end of a negative wire are connected to a positive electrode and a negative electrode of each temperature difference power generator respectively. Meanwhile, the power input end of the positive wire and the power input end of the negative wire are connected with the power output end of the rectifier, the power output end of the positive wire and the power output end of the negative wire are connected with the power input end of a voltage stabilizer in an interlayer of a coat body, the power output end of the voltage stabilizer is connected with the power input end of a USB charging plug, and the USB charging plug is arranged in a pocket. The temperature difference power generator and the bracelet are combined for power generation, electric energy is generated, therefore, a mobile phone or other mobile rechargeable equipment is charged through the USB charging plug, the problems that charging is troublesome for people, and power source carrying is inconvenient are solved, and more probabilities are given to clothes and the bracelet.

The invention discloses a simple face recognition and classification system which comprises a face capture module, a data processing module, a neural network module and a recognition test module. Theface capture module uses an OpenCV or Dlib library to mark and extract a face in the face captured by a camera to obtain a face data set; the data processing module processes the face data set obtained by the face capture module, so that the face data set can be trained and learned by a neural network; the neural network module trains and tests the processed data obtained by the data processing module to obtain a weight model file of network training; and the recognition test module is used for demonstrating face recognition. According to the invention, a TensorFlow deep learning framework israpidly utilized to build a simple face recognition classification system, and more reference possibilities are provided for application of deep learning in face recognition; meanwhile, the system canalso provide more possibilities in the fields of security verification, entrance guard recognition, face payment and the like which apply face recognition.

The invention discloses an MNO fusion management platform, the management platform is arranged on a pre-built basic cloud platform, the fusion management platform comprises a plurality of sub-platforms and a unified interface, and the fusion management platform is used for realizing interaction with an operator MNO platform in Internet-of-vehicles MNO fusion service management by using consistentinterface standards for access of the same interfaces of different MNOs. The method has the advantages that the SIM card can be better managed, the access of a plurality of operation service providersis realized, the accurate account checking is realized, the operation and maintenance burden is reduced, and more possibility is provided for the operation.

The invention provides a method and device for realizing Josephson junction selective epitaxial growth and a medium. The Josephson junction is a superconducting circuit Josephson junction, and the selective epitaxial growth is achieved based on a topological insulator. The method specifically comprises the steps of S1, preprocessing a wafer to obtain a mask, wherein the mask is used for the selective epitaxial growth of the Josephson junction; S2, carrying out isotropic etching on a silicon dioxide film in the mask plate by using hydrofluoric acid so as tosuspendthe mask plate; S3, spraying the high-temperature atomized topological insulator by using an electron beam evaporator so as to realize the selective epitaxial growth ofthe topological insulator through the mask above the groove; and S4, depositing a superconductor on the topological insulator on which the selective epitaxial growth is completed, so as to obtain the Josephson junction formed by the superconductor and the topological insulator.

The invention discloses a device and method for finishing a suspended abrasive pool through triangular frustum air pressure jet holes. Thedevice and method capable of efficiently finishing complex curved surfaces, irregular holes and ultra-precision parts are researched and designed. The device comprises a frame, the abrasive pool, an air pressure power system, an air injection system and a workpiece rotating system. According to the device, a fluidized bed principle is utilized, and finishing at different degrees on different workpieces is implemented by changing air flow velocity and abrasive particles. According to the device, the triangular frustum jet holes are adopted to further gather and pressurize high-speed air flow, so that energy consumption of the air pressure power system isreduced. The device is simple to operate and low in cost, is not harmful to the environment, is not influenced by other factors, and works stably and efficiently.

The invention provides a drug composition for synergistically resisting a pancreatic cancer. The drug includes an active component and a pharmaceutically acceptable auxiliary material and is characterized in that the active component includes gemcitabine and a triterpenoid; and the triterpenoid is 3 alpha, 11 alpha-dihydroxy-lupin-20(29)-ene-28-acid or 3 alpha-hydroxy-lupin-20(29)-ene-23, 28-diacid. According to the drug composition, the synergistic effect of combined medication to pancreatic cancer cells is judged on various aspects of a pancreatic cancer cell growth state, a cell growth inhibition percentage, influences of cell cycle and apoptosis and the like; and due to the drug resistance of the gemcitabine, by adopting combined medication, more medication safety is provided, clinic use dosage of the gemcitabine is lowered, the toxic and side effects generated by using a large dosage of the gemcitabine are reduced, the clinic treatment safety index is improved, and more possibilities are provided for clinic application of the gemcitabine.

The invention discloses an organic spin valve device based on a two-dimensional metal organic framework film material and a preparation method. The preparation method comprises steps of (1) preparinga strip-shaped lanthanum strontium manganese oxygen bottom electrode on a substrate through a magnetron sputtering method, and obtaining the substrate with the strip-shaped lanthanum strontium manganese oxygen bottom electrode; (2) immersing the substrate in the step (1) into an aminosilane solution for reaction, taking out, washing and drying; (3) dissolving a copper salt, a nickel salt or a cobalt salt to prepare a solution A, and preparing an organic ligand into a solution B; (4) soaking the product obtained in the step (2) in a solution A and a solution B in sequence; (5) drying; and (6) evaporating a layer of metal cobalt film as a top electrode on the upper surface of the product obtained in the step (5) through a strip-shaped mask plate, and then evaporating a gold film as a protective layer. The method is advantaged in that the layer-by-layer self-assembly method can effectively solve problems that the two-dimensional metal organic framework material is difficult to dissolve and form a film, and are simple, low in cost, low in equipment requirement and suitable for large-scale production.

The invention discloses a volume adjusting method of equipment. The volume adjustment method of the equipment can improve the user experience and meet the actual needs of a user, and comprises the steps that a volume adjustment operation is responded, a volume adjustment coefficient pointed by the volume adjustment operation is determined, and the volume adjustment coefficient is a coefficient foradjusting the current volume of the equipment to the target volume; and the volume of the equipment is adjusted to the target volume according to the volume adjustment coefficient. The invention further provides computer equipment and a computer readable storage medium.

The invention relates to 3D printing technology, in particular to a 3D printing pen which comprises a pen shell and a pen point arranged at the front end of the pen shell, wherein the pen shell comprises an energy storage shell and a 3D printing pen shell; a pushing rod is movably mounted in the energy storage shell at the tail end of the pen shell; the tail part of the pushing rod stretches out of the energy storage shell; an energy storage spring is mounted on the pushing rod in the energy storage shell; the head of the pushing rod stretches into a printing material tank; and the head of the 3D printing material tank communicates with the pen point via a control valve in the 3D printing pen shell. The 3D printing pen, disclosed by the invention, is a novel handheld type 3D printing pen which can realize extrusion of 3D printing materials without adopting an electric device, and the pen points with different functions can be changed at will, so that the mechanical structure of the traditional handheld type 3D printing pen is greatly optimized, the difficulty of a production technology is lowered, the malfunction hidden danger of a traditional product is reduced and the manufacturing cost of the traditional product is greatly reduced.

The invention relates to the technical field of genetic engineering, and especially relates to a sgRNA for targeted knockout of a TNF[alpha] gene, a porcine embryo fibroblast cell line for knocking out the TNF[alpha] gene and applications of the fibroblast cell line. The target sequence of the provided sgRNA on the TNF[alpha] gene is located on the first exon and shown as SEQ ID NO: 1. After the sgRNA is constructed into the vector px330, an expression vector pX330-TNF[alpha] is taken as the targeting vector of the TNF[alpha] gene; and porcine embryo fibroblast cells are transfected so as to obtain the TNF[alpha] gene-knocked-out monoclonal cell line of porcine embryo fibroblast cells, and the obtained mutant having many different editing types can cause frameshift mutation, so that high editing efficiency can be achieved. The prepared cell line can be used as the donor of somatic cell nuclear transfer for the preparation of transgenic swine, so that the cell line has large applicationand research values.

The invention discloses a high-gain slot antenna based on a graphene three-dimensional phase tunable lens and a method. The antenna adopts the graphene three-dimensional phase tunable lens, and the graphene three-dimensional phase tunable lens is placed at the front end of the slot antenna, so that the slot antenna can tune the lens unit through the reconfigurable characteristic of graphene under different bias voltages. Different bias voltages can change the surface resistance of the graphene material, so that the characteristics of the lens can be changed, the energy and phase distribution in the aperture of the slot antenna can be changed, the gain of the antenna can be improved, and the directional diagram distortion of the antenna can be eliminated. Meanwhile, the lens-loaded slot antenna is a novel mixed graphene-metal structure slot antenna, and a radiation slot structure of the antenna is replaced by a graphene structure, so that control of energy in the aperture of the antenna is further enhanced, and the frequency reconfigurable characteristic is brought to the slot antenna.

The invention discloses an MIMO radar amplitude-phase error correction method, which applies a particle swarm evolution algorithm to MIMO radar angle positioning and amplitude-phase error correction, and the defects that the particle swarm algorithm is easy to fall into local optimum and insufficient in search capability by introducing a flower pollination algorithm and a Gaussian mutation algorithm are overcome. Thus, the improved method can converge to the optimal result more quickly, an amplitude-phase error calibration matrix is obtained, and finally accurate angle positioning is achieved.

The invention relates to a touch perception guide manual. The touch perception guide manual is characterized by being manufactured by the following steps of: firstly, typesetting and designing an exhibition manual according to preset patterns and characters; secondly, typesetting and designing braille structures corresponding to the characters at positions where the characters are designed on theexhibition manual, wherein the braille structures are overlapped with the characters, and character colors adopted by the characters form certain color contrast with a background color, so that the characters are highlighted; and for the patterns typeset and designed on the exhibition manual, processing different parts of the patterns by using different materials and / or different texture lines, so that different parts of the patterns output different touch information. According to the touch perception guide manual, the obstacle of information communication of visually impaired people duringvisiting of exhibition places is avoided to a certain extent, sensory experience except visual perception is provided for common visiting groups, and the educational function of the exhibition placesis exerted to the maximum extent.

The invention discloses a surface difference measuring device for an excavator outer part and a method thereof. The device comprises a magnetic base body, an angle adjusting mechanism arranged on the magnetic base body and a laser range finder inserted into the angle adjusting mechanism. The angle adjusting mechanism comprises a first adjusting mechanism fixedly installed on the magnetic base body, a stand column rotationally arranged in the first adjusting mechanism, and a second adjusting mechanism connected to the stand column in a sleeving mode. According to the invention, the laser range finder can be adjusted in span and multiple directions through the angle adjusting mechanism on the equipment, and simple and effective surface difference measurement can be carried out on some non-horizontal and vertical space planes or regular curved surfaces limited by factors such as measurement postures, measurement surface gaps and measurement space, so that more possibilities are provided for the design of a measuring method; measurement errors caused by local buckling deformation and the like can be effectively reduced, and the test precision is improved.

The invention discloses a racemic gem disilyl alkane compound containing four silicon-hydrogen bonds. The compound is as shown in a formula IV. The invention further discloses a synthesis method of the racemic gem disilyl alkane compound. The synthesis method comprises the following step of carrying out a reaction by taking alkyne as shown in a formula I and trihydrosilane as shown in a formula IIas raw materials and taking a chiral CoX<2>-IIP complex as a catalyst in the presence of a reducing agent to obtain the racemic gem disilyl alkane compound containing four silicon-hydrogen bonds, wherein the compound is as shown in the formula IV. The method disclosed by the invention has mild reaction conditions, is simple and convenient to operate and has high atom economy. In addition, the reaction does not need addition of any salts of toxic transition metals (such as ruthenium, rhodium, palladium and the like), and the method has a relatively large practical application value in synthesis of medicines and materials. In addition, the reaction has a medium to excellent yield (51-99%) and high area selectivity (10:1-19:1, most parts larger than 19:1).