80results about How to "Overcome cumbersome" patented technology

The invention relates to a method for objectively and quantifiably evaluating noise fret degree in a vehicle based on an auditory model, in particular to an evaluation method of psychoacoustics and vehicle sound quality. The method comprises the following steps: designing a dummy head model; imitating a processing mechanism of the middle ear and the inner ear of a human body to the sound by usingan auditory peripheral calculation model; collecting vehicle noise signals under the working conditions of uniform, accelerated and idle speed; pre-treating the noise sample and processing the loudness in specification; obtaining a psychoacoustics parameter by using a sound quality calculation model; obtaining subjective evaluation result test data by using a grouped and paired comparison method;calculating and painting a correlated scatter plot chart between each parameter and the ranking value of the subjective evaluation result; and analyzing and calculating to obtain the objectively quantifiable model of the subjective fret degree under each working condition. The invention can realize the psychoacoustic parameter calculation of objectively evaluating the sound quality with differentvehicle types, gears and speeds, wherein the calculated value has good pertinence and consistency with the evaluated result of the subjective evaluation method. The invention has stable evaluated result and high reliability, and can improve the sound quality and competitiveness of vehicles combined with the design of new CAE cars.

A rotor system dynamic balance excitation identification method is disclosed. The method is characterized by carrying out experiment determination; collecting output of an eddy current sensor on a rotating shaft and acquiring an actual measurement value of a rotor vibration response; when a motor stops rotating, collecting a geometrical parameter and a material parameter of a rotor system and establishing a finite element model of the rotor system; through finite element simulation, acquiring a simulation value of the rotor vibration response; setting a rotor system dynamic balance excitation identification target function and an optimization model; and using an optimization algorithm to carry out iteration solution and acquiring an initial imbalance amount, bearing rigidity and a damping parameter of the rotor system. By using the method, a simulation result and an experiment result are optimized; based on parts of experiment data, through rotor system dynamic balance excitation possessing good robustness and identification precision, effective identification is performed; the method can be easily applied to actual engineering; and an application is less limited by an equipment result and a test condition.

The invention discloses equipment for enabling a copper pipe to pass through a fin of a condenser. The equipment comprises a support, as well as a push plate driving system, a copper pipe collector, a fin collecting disc and a traction device which are sequentially positioned on the support, wherein the copper pipe is placed on a supporting base of the copper pipe collector, and clearance layers formed between clapboards or partition posts are stacked; a push plate passes through the upper part of the supporting base which can reciprocate up and down so as to push the copper pipe into the fin hole of the fin collecting disc; meanwhile a draw rod enters into the fin hole from the other side of the fin collecting disc under the effect of a guide mechanism, so as to draw the copper pipe, and a drawing head is inserted into the opening end of the copper pipe; when the draw rod is retreated from the fin hole, the copper pipe is synchronously guided into the fin hole, after that, the push plate and the draw rod are reset, the upper-layer copper pipe orderly falls to the supporting base so as to be subjected to the next round of pipe passing. The equipment is simple in operation and high in stability and safety, and can be used for improving the pipe passing efficiency and the alignment accuracy, reducing the equipment stagnation period in a pipe passing process and reducing the human cost and the equipment loss.

The invention relates to a cellulose carbamate dissolved combined solvent. The solvent is an aqueous solution comprising 6 to 10 weight percent of sodium hydroxide and 0.1 to 3 weight percent of zinc oxide. A dissolving method comprises the following steps of: dispersing a certain amount of cellulose carbamate in a solvent composite, freezing at the temperature of between -20 and -10 DEG C for 3 to 5 hours or freezing in liquid nitrogen for 3 to 5 minutes, unfreezing at the temperature of less than or equal to 50 DEG C, and dissolving to obtain the cellulose carbamate solution at high concentration of 4 to 15 weigh percent. The obtained cellulose carbamate solution is low in sodium hydroxide content, high in solution stability, and has high mobility after standing at normal temperature for several days, and a gel phenomenon is avoided. The cellulose carbamate solution can be used for preparing fibers and films.

The invention discloses a dynamic partition electricity price calculation method based on partition clustering analysis. The method comprises constructing a direct-current optimal power flow optimization target, determining a power system operation constraint condition, solving to obtain optimized hydroelectric output, and then solving node electricity price, conventional unit and new energy unitoutput, power flow data, an active dual factor and node injection power; generating an effective clustering attribute; determining an optimal clustering number; generating a dissimilarity matrix through standardization processing and a Euclidean distance method, and dividing a clustering algorithm to realize clustering; dividing each electricity price area according to the clustering result, and finally determining the unified pricing of each area; feeding back a calculation result of the regional electricity price, and carrying out settlement on market participants in each region according tothe regional electricity price. According to the invention, the electricity price of each subarea can be determined, and finally, each node in the same area is settled in a unified pricing manner, sothat the practical operability is improved, and the demand of obtaining relatively stable price by most users is met.

The invention discloses a preparation method of tin-based oxide with controllable components and a photocatalytic application of the tin-based oxide. The preparation method is characterized in that the tin-based oxide is prepared from stannous chloride dihydrate with one-step hydrothermal method, and samples with four different components including Sn<2+> / SnO2, SnO / SnO2, SnO or SnO2 are synthesized selectively through control of composition of a hydrothermal solution, wherein Sn<2+> / SnO2 and SnO / SnO2 show efficient photocatalytic degradation decoloration activity to methyl orange under visible light. The samples are selectively synthesized with the one-step hydrothermal method, the preparation process is simple, raw materials are cheap and available, defects of the complexity of a traditional synthesis method and uncontrollability of composition of target products are overcome, and application and popularization prospect is realized.

The invention discloses a multispectral image classification method based on dual-channel deep convolutional generative adversarial network (DCGAN) and feature fusion. The method comprises steps of: inputting multispectral images; normalizing the image of each band of each multispectral image; obtaining a multispectral image matrix; obtaining a data set; creating a dual-channel DCGAN model; training a dual-channel DCGAN classification model; and classifying a test data set. The multispectral image classification method introduces the dual-channel DCGAN, combines the feature fusion, extracts avariety of multispectral high-level feature information in multiple directions, enhances the feature characterization ability, and improves the classification effect.

Disclosed is a method for enhancing metal phase microscopic structure with fake color. The method comprises designing a matching relation model of the metal phase gray grades versus fake colors; compiling a metal phase fake color system operated on computer; inputting the gray grades digital image of the metal phase microscopic structure into computer, selecting whether to perform gray histogram equalizing process according to the quality of the contrast of the original image gray grade; performing fake color conversion on the metal phase image with proper gray contrast, and forming and displaying the fake color digital image to distinguish and identify the metal phase microscopic structure.

The invention discloses a method for recovering configuration information of network equipment, which comprises the steps that: after receiving the command for recovering the configuration information, the network equipment automatically reads the saved log files; that whether the records of the log files comprise saving command is judged, if so, configuration command is found from the saving command; if not, the configuration command is found from the initial position of the log files; the found configuration command is utilized to generate configuration files to recover the configuration information of the network equipment. The method of the invention fully makes use of the characteristic that the log files record the configuration command, which can realizes recovery of the configuration of network equipment which is lost owing to not being saved in time. Corresponding to the method, the invention also provides a device for recovering the configuration information of network equipment.

The invention discloses a terminal and a wireless charging method and system of the terminal. The wireless charging system comprises a wireless charging device and the terminal, wherein the wireless charging device comprises a pulse generator circuit, a pulse modulator circuit and a launching probe; the terminal comprises a receiving module, a charging circuit and a rechargeable battery; the pulse generator circuit generates a high-frequency pulse single; the pulse modulator circuit modulates the high-frequency pulse single; the launching probe converts the pulse single into a vibration wave to be sent out; the receiving module is used for receiving a resonance wave launched by the launching probe and converting the resonance wave into an electric single; and the rechargeable battery is charged by the charging circuit. Compared with the prior art, a mobile terminal can charge the battery by using a wireless resonance wave, thereby overcoming the complication and inconvenience of charging a cable.

The invention discloses a skin-whitening skin-tendering freeze-dried facial mask containing adenium obesum essence and a preparation method thereof. The facial mask contains freeze-dried powder. The freeze-dried powder comprises the following components: 0.1-15 parts of adenium obesum leaf cell extract, 0.1-5 parts of hydroxyethylurea, 0.5-5 parts of PEG / PPG / polybutylene glycol-8 / 5 / 3 / glycerol, 0.1-5 parts of glycerol, 0.1-8 parts of sodium hyaluronate, 0.5-5 parts of a natural thickener, 0.1-5 parts of papain, 0.1-3 parts of calcium pantothenate, 0.1-3 parts of urea, 0.1-5 parts of caprylyl glycol, 0.1-5 parts of amino acids, 0.1-5 parts of moisturizing factors, 0.1-5 parts of ethylhexylglycerin and 5-60 parts of water. After being used, the freeze-dried facial mask disclosed by the invention makes the skin healthy, white, fine, smooth and compact, and can delay aging, repair damaged cells and enhance the resistance of the skin with long-time use.

The invention discloses a biological age step-by-step predication method based on a support vector machine, and relates to the biological age step-by-step predication method based on the support vector machine. The invention aims to solve the problems that a conventional biological age predication method is low in predication efficiency, low in accuracy, high in cost, and complex. According to the technical scheme, the biological age step-by-step predication method comprises: step I, preparing a biological age data set; step II, distinguishing a biological sample with known ages from a biological sample with unknown ages; step III, carrying out inter-group classifying; step IV, generating a corresponding support vector machine model; step V, establishing an optimal support vector machine model; step VI, establishing an optical characteristic sub set; step VII, obtaining the group type of an age group corresponding to the biological sample with known ages in the test set; step VIII, carrying out inter-group classifying; step IX, generating an inter-group classified support vector machine model; and step X, obtaining the exact age of a test set sample in certain age group. The biological age step-by-step predication method is applied to the biological age predication field.

The invention discloses an LAMP detection primer composition for phytophthotacactorum, as well as an LAMP detection kit and an LAMP detection method of the LAMP detection primer composition. The LAMP detection primer composition consists of a positive inner primer FIP, a reverse inner primer BIP, a positive outer primer F3, a reverse outer primer B3 and a reverse loop primer LB; detailed sequences of all the primers are as follows: FIP: 5'-TCTGGGCACAACCGCAAAAA-TTTGCGAGCTCCAGATTTCC-3'; BIP: 5'-AATCCGTACGATCGAGCTGGAC-ACACGCCACGTCTGCT-3'; F3: 5'-TTCTGCGCTAGGCGACC-3'; B3: 5'-CACACAAGTGGACCGTTAG3'; LB: 5'-GGAAAGACCATCAAGCTCCAGAT-3'. The detection method disclosed by the invention is high in accuracy, high in specificity, convenient to operate and good in practicability; constant-temperature amplification is realized; meanwhile, a novel technology platform is provided for detection of the phytophthotacactorum; the detection method can be applied to high-sensitivity rapid detection of the phytophthotacactorum; simultaneously, pathogens can be identified in initial stage of invasion of diseases, and the phytophthotacactorum soil of a field can be detected. The LAMP detection primer composition for the phytophthotacactorum, as well as the LAMP detection kit and the LAMP detection method of the LAMP detection primer composition, disclosed by the invention, play an important role in epidemic treatment caused by the phytophthotacactorum, reduction of sightless usage of pesticides, reduction of production cost and reduction of environmental pollution caused by the pesticides as well.

The invention belongs to the field of synthesis of polymer monomers, and specifically relates to a synthesis method of siloxane-substituted maleimide which can be used as an active coupling agent of glass fibers for greatly improving the combination force of the glass fibers and organic resins. The traditional manufacturing method of such coupling agent is a two-step method and comprises the steps of enabling amino alkyl siloxane and maleic anhydride to react to generate maleamic acid alkyl siloxane; synthesizing the siloxane-substituted maleimide through amic acid under the effect of a dehydrating agent. The invention provides a novel synthesis method for preparing a target product through raw materials that are alkali metal salt of maleimide and halogen alkyl siloxane by an one-step mode in the presence of a polar aprotic solvent, aims at overcoming the shortages that the traditional synthesis method is cockamamie in process and the dehydrating easily leads to hydrolyzing of siloxane. The method, by being compared with the traditional synthesis method, has the advantages that the after-treatment is convenient, the siloxane is avoided electrolyzing, and the product is high in purity.

The invention discloses a manufacturing method of a plastic concrete inspection well, which comprises the following steps of: heating a plastic, extruding the plastic into a belt or a strip through a plastic extruding machine, using the obtained belt or the strip and a small amount of steel bars for weaving to form a cage-shaped framework of a formed part, placing into a cavity formed by an inner mold and an outer mold, casting concrete and adding trace plastic fibers into the concrete. By adopting the manufacturing method, the inspection wells in different specifications can be produced, centralized forming can be performed in a factory, the inspection well can be divided into sections for modular manufacturing, and then field assembly is performed, thereby overcoming inconvenience and cumbersome property caused by field construction; and simultaneously, the product is corrosion-resistant and reliable in quality.

The invention discloses a method for preparing artificial seeds of a submerged plant, vallisneria natans. The method comprises the following steps: (1) washing seedlings of vallisneria natans by water to remove plankton on the surfaces of the seedlings; (2) cutting plant leaves and long roots, and washing remaining tail stems and few roots of the plant by distilled water; (3) putting the washed remains in a gel solution formed by mixing calcium chloride, starch, a Hoagland's nutrient solution of anhydrous magnesium sulfate and naphthylacetic acid; and (4) dropwise adding the gel solution containing the buds of vallisneria natans into a solution of sodium alga acid and magnesium sulfate for carrying out a curing reaction by a dropper, taking out the buds after the curing reaction, and rinsing by sterile distilled water, thereby obtaining the artificial seeds of vallisneria natans after the reaction is ended. According to the method, plant tissue culture is omitted, the method does not need to be performed under sterile conditions, and thus the preparation processes are greatly reduced; the Hoagland's nutrient solution serves as artificial endosperm, the cost is greatly reduced, the period is shortened, and the survival rate is high. Moreover, a hollow capsule coating system is adopted, a liquid envelope is formed around a propagule, and thus the plant propagule is well protected.

The invention discloses a breeding method for rape. The breeding method comprises the steps as follows: selecting a rape variety Zhenyou No.5 which is planted in a large area in production, and has the characteristics of high yield, good disease resistance and lodging resistance, outstanding comprehensive characters and wide applicability, and performing purification and rejuvenation; collecting and screening an excellent variety (line) which has relatively far genetic relationship with the Zhenyou No.5, and has the characteristics of double-low quality, good yielding ability, outstanding stress resistance and high oil content and performing purification and rejuvenation; taking the Zhenyou No.5 purification and rejuvenation line as a female parent and taking the screened distant related purification and rejuvenation line as a male parent, and performing castration and hybridization manually; harvesting seeds and planting in the same year to perform yield identification, performing field screening to obtain hybrid seeds with good comprehensive characters, high yield and strong advantages, and performing indoor seed test and quality determination in a combination way on the selected target combination; adopting a chemical hybridizing agent to perform chemical hybridizing on the Zhenyou No.5, and planting the male parent to perform seed production, so as to product hybrid seeds; performing a multi-point test on the produced seed target combination through chemical hybridizing, and testing the advantages and the wide adaptability of the produced seed target combination; performing pre-production, demonstration and popularization.

The invention discloses a design of a layered bone marrow puncture needle. The layered bone marrow puncture needle comprises a needle core, the left end of the needle core is provided with a sphericalhandle, the side face of the needle core is slidably sleeved with an inner-layer sleeve, a locating rod is arranged at the left end of the inner-layer sleeve, the outer side face of the inner-layer sleeve is sleeved with an outer-layer sleeve, a handle is arranged at the left end of the outer-layer sleeve, a tine is arranged at the right end of the side face of the outer-layer sleeve, and a fixing bolt is arranged at the left end of the side face of the outer-layer sleeve. By the adoption of the design of the layered bone marrow puncture needle, while the whole puncture needle enters a marrowcavity, the outer-layer sleeve is fixed to cortex of bone; marrow fluid can be extracted through the inner-layer sleeve, sclerotin can be extracted continuously after the inner-layer sleeve is pulledout, and thus sclerotin detection is facilitated, the defects of repetition and complexity due to the need of twice needle inserting and puncture in a traditional mode are overcome, the work efficiency is improved, and the practicability is high.

The invention provides a method for rapidly identifying H. villosa chromosomes in a wheat background. According to the method, two oligonucleotide probes are firstly provided, the nucleotide sequences of the oligonucleotide probes are respectively shown as SEQ ID NO.1-2, the two probes are mixed and combine with an ND-FISH technology and can be used for identifying the H. villosa chromosomes in a wheat and haynaldia villosa hybridization generation, 7 H. villosa chromosomes are accurately identified while wheat chromosomes and the H. villosa chromosomes can be clearly distinguished, and wheat-haynaldia villosa translocated chromosomes can be identified. By adopting the method, the shortcomings of a GISH technology and an existing ND-FISH technology can be overcome, and the effects of the GISH technology and the existing ND-FISH technology can be also achieved. The method facilitates identification of the wheat-haynaldia villosa translocated chromosomes and has the very good prospect in the field of wheat breeding.

The invention provides a Zigbee initial secret key distribution method. The method comprises the steps that a bit string S generated randomly by a trusted node is used as priori knowledge for generating a symmetric key; the S is modulated and sent; whether transmission of a modulated data packet is completed or not is judged; if transmission is completed, a packet with all the data payloads being 0 is transmitted for representing that transmission of secret data is completed; a bit string A is randomly generated by the trusted center node, B is generated based on the A and the S, and the B is transmitted to a network access node; a data packet transmitted by the network access node is waited for, if the data packet is received, a bit string D transmitted by the network access node is received, a bit string E is obtained through the A and the D, and the trusted center node transmits the bit string E to the network access node through an E encryption network secret key. The Zigbee initial secret key distribution method is based on a covert channel, no node hardware equipment needs to be added, and the accuracy and safety are improved.

The invention relates to a preparation method of artificial seeds of submerged plants (hydrilla). The method comprises the following steps: 1. washing the taken hydrilla seedling with water to remove plankton on the surface of the hydrilla seedling; 2. cutting off the roots and leaves of all the plants, picking up the eugenic plants and washing the eugenic plants with distilled water; 3. cutting off the lateral buds and the terminal buds with internodes and putting the lateral buds and the terminal buds into gel liquid which is formed by mixing of sodium alginate, hoagland's nutrient solution and NAA (nicotinic acid amide); 4. dropping the gel liquid containing hydrilla buds into CaCl2 by a dropper to perform curing reaction, taking out gel liquid after the curing reaction and rinsing with sterile distilled water, and terminating the reaction to obtain the artificial hydrilla seeds. According to the method, the step of plant tissue culture is eliminated, and the method is not required to be implemented under an aseptic condition, the preparation process is greatly reduced, the cost is greatly reduced, the period is shortened, and the survival rate is high.

The invention relates to a method and a terminal for protecting user privacy information. The method comprises the following steps: acquiring indication information for protecting the user privacy information, wherein the indication information for protecting the user privacy information is used for indicating that whether the user privacy information in a service operation process is saved or not; and determining whether to save the user privacy information in the service operation process or not according to the indication information for protecting the user privacy information. Implementation of the embodiment of the invention can effectively solve the problem of complicacy and delay of privacy information protecting method in the prior art, so that uses can set the privacy information to be protected according to personal requirement to ensure that the users can realize protection of privacy information according to the requirement.

The invention discloses a semantic image retrieval method based on an attention mechanism, and mainly solves the problem that a semantic gap affects retrieval accuracy in a picture retrieval process.The method comprises the following steps: 1) constructing a CNN-RNN network model containing an attention mechanism and training the CNN-RNN network model; 2) extracting text features of pictures in an image library by using the trained network model; 3) extracting semantic feature vectors of the text features by using a text vector doc2vec model and storing the semantic feature vectors; 4) extracting text features of the query picture by using the trained network model, and extracting semantic feature vectors corresponding to the text features; and 5) calculating and comparing the feature vector of the query picture with the feature vector in the image library by using a cosine method, and outputting a result. According to the method, the influence caused by a semantic gap can be effectively reduced, so that the system can perform similarity retrieval on semantic information shown by the pictures, and the method can be used for quick retrieval of mass data in the Internet and search of mobile phone pictures in daily life.

The invention belongs to the field of nano material preparation and discloses a silicon dioxide nanowire preparation method. Common silicate glass is adopted as raw materials to prepare SiO2 nanowires according to an ammonium hydroxide hydrothermal method. The SiO2 nanowire preparation method is low in raw material cost and simple in manufacturing process, overcomes the defect of complexity, inconvenience or high risk of a traditional method and is conducive to large-scale production.

The invention discloses Phytopythiumvexans detection primers, LAMP detection system, kit and method. The detection primers include a forward inner primer FIP, a backward inner primer BIP, a forward outer primer F3, a backward outer primer B3 and a forward loop primer LF. Compared with a traditional detection technology for identifying Phytopythiumvexans according to morphological characteristics,the detection method provided by the invention has the advantages of high accuracy and sensitivity and convenience in operation, and provides a new technical platform for Phytopythiumvexans detectionwhile realizing constant-temperature amplification. The method can be used for high-sensitivity rapid detection of the Phytopythiumvexans in production practice, pathogens can be identified in the early stage of disease infection, and the Phytopythiumvexans in field soil can be detected. According to the invention, reliable technical and theoretical bases are provided for prevention and treatmentof the Phytopythiumvexans.

The invention relates to a stepped coop. The stepped coop comprises a plurality of stepped dismountable cage shelves, a manure clearing machine arranged at one end of the coop, and a manure belt tensioning device arranged at the other end of the coop, wherein the adjacent stepped dismountable cage shelves are connected through cage shelf cross beams, and a cage net is arranged in the structure formed by the stepped dismountable cage shelves and the cage shelf cross beams. The stepped coop has the advantages that cage shelve reinforcing ribs are arranged at the lower ends of the positions where the cross beams are connected with cage legs, so that the cage shelves are stable and durable; a first side plate and adjusting plate combined structure is adopted, and a second side plate is of a fixed structure, so that the problem that installation and adjustment of side plates of an existing manure clearing machine frame are complicated is solved; a spiral shaft provided with a spiral body is adopted for rotation and matched with a pressing shaft, tensioning and pressing of a manure belt are achieved, the structure is simple, installation is convenient, and the service life of the manure belt is prolonged.

The invention provides a component generation method, a component generation device, a computer system, a computer readable storage medium and a computer program product. The component generation method comprises: calling a component generation framework, and generating an initial virtual document object model, wherein the component generation framework comprises a first rendering method and a second rendering method, and the initial virtual document object model is a basic hypertext markup language tag or a function component; rendering the initial virtual document object model to generate a component, which comprises the following steps: rendering the basic hypertext markup language tag by utilizing a first rendering method; and rendering the function component by using a second rendering method.

The invention relates to the technical field of chopping board processing, and discloses a chopping board round edge processing machine and a chopping board round edge processing method. The chopping board round edge processing machine comprises a bracket, a locating device and a cutter device; the bracket comprises a tray used for placing a chopping board and a tray bracket used for supporting the tray; the locating device comprises an ejector pin and an ejector pin lifting mechanism; the ejector pin is arranged above the tray; the ejector pin lifting mechanism is connected with the ejector pin and is used for driving the ejector pin to move up and down; the cutter device comprises a milling cutter and a milling cutter rotating mechanism used for driving the milling cutter to rotate around the self center axis; the milling cutter is arranged at one side of the tray, at least one out of the milling cutter and the tray can translate relative to the other one; when the round edge of the chopping board is processed, the milling cutter makes circular motion along the horizontal direction around the tray, and / or the tray rotates around the self center axis. The chopping board round edge processing machine is capable of automatically cutting the round edge of the chopping board, the problems that the existing manual chopping board round edge processing method is complicated in process, low in efficiency and poorer in product quality can be solved, and the working efficiency is greatly improved.

The invention discloses a weather radar levelness automatic measuring system which comprises an on-duty device, an antenna pedestal levelness measuring device, a feed source levelness measuring deviceand a wireless communication module. The on-duty device is used for sending an awakening signal at set time; the antenna pedestal levelness measuring device is used for starting to measure the antenna pedestal levelness in different directions when the pitch angle is 0 degree according to the wake-up signal; the feed source levelness measuring device is used for starting to receive a radar sidelobe radiation signal according to the wake-up signal and calculating the feed source levelness according to the radar sidelobe radiation signal; and the wireless communication module is used for sending the levelness of the antenna pedestal and the levelness of the feed source in different directions to an upper computer for display. By arranging the antenna pedestal levelness measuring device andthe feed source levelness measuring device, the feed source levelness and the antenna pedestal levelness in different directions can be automatically measured, and the problems of long time, complicated process and high labor intensity of traditional measurement are solved.

The invention discloses an automatic gun, and relates to the technical field of firearms. The automatic gun comprises a gun barrel and a mounting plate. The gun barrel is provided with a plurality ofannularly-distributed bullet grooves. The gun barrel is rotatably arranged on the mounting plate through a rotating shaft. The automatic gun further comprises a firing gear. The firing gear comprisesa stroke sleeve, a firing pin and a spring. The lower end of the firing pin is mounted on the mounting plate in an up-down movable mode through the stroke sleeve, and located over one of the bullet grooves in the gun barrel. The interior of the stroke sleeve is provided with the spring for enabling the firing pin to move downwards. The firing gear further comprises a first driving unit for enabling the gun barrel to rotate in a unidirectional intermittent mode, and a second driving unit for pushing the firing pin upwards. According to the automatic gun, automatic firing and bullet replacing can be achieved without manual pulling of the firing pin and manual transferring of the gun barrel, and the automatic gun has the advantages of being simple in structure, easy and convenient to operate,high in automation degree, high in working efficiency, high in safety performance and the like.