104results about How to "Difficulty of Simplification" patented technology

The invention discloses an optical fiber terahertz communication system optimization method based on artificial intelligence, and belongs to the technical field of communication. According to the method, four-dimensional constellation shaping is constructed by utilizing additional dimensions provided by two independent sidebands, and an end-to-end optimization framework is divided into a training stage and a deployment stage; in the training stage, firstly, an equalizer based on a pruning neural network and an equalized channel model based on a mixed density network are trained in sequence through receiving and transmitting of a random training sequence; then connecting a constellation shaper at a transmitting end with a demapper at a receiving end through an equalized channel model with fixed parameters, thereby considering full-link residual distortion and noise after equalization, and carrying out back propagation gradient to learn a globally optimal four-dimensional joint geometric probability constellation diagram to further approach the Shannon limit; and in the deployment stage, transmission of the bit stream is realized through coordination of the four-dimensional geometric shaping constellation table and the probability distribution obtained in the training stage and an equalizer at the receiving end and a demapper.

According to the single-fiber coupling type double-beam miniaturized high-sensitivity atom magnetometer device, pumping laser and detection laser are orthogonally coupled into a single polarization maintaining fiber through a polarization beam splitter, and miniaturization of a light source light path is achieved. Besides, the polarization maintaining optical fiber and the polarization beam splitter are adopted to combine and decouple the light beams, so that the problems that the miniaturization difficulty of the magnetometer probe is increased due to light guide of multiple collimating heads and extra noise is introduced by multiple optical fibers are avoided, and high sensitivity is realized in a small detection volume; and a great promotion effect is achieved in related detection application of high-density multi-atom magnetometer array type heart and brain magnetism.

The invention provides a power grid management platform operation cost evaluation method and system based on big data, and a medium. The method comprises the steps of obtaining current power grid operation state data information of a power grid management area through a big data technology; modeling based on the current power grid operation state data information to simulate a constructed power grid operation virtual system; making a corresponding power grid transformation scheme based on the power grid operation virtual system according to a transformation evaluation algorithm; based on the power grid transformation scheme and through a power grid transformation cost assessment model, assessing the power grid transformation operation cost; updating the power grid operation virtual system according to the power grid reconstruction scheme; and performing operation cost evaluation based on the updated power grid operation virtual system to obtain the power grid management operation cost of the power grid management area. Precise evaluation of the power grid operation cost is realized through big data analysis and a data modeling technology, and a main support basis is provided for stabilizing operation balance of a power grid system.

The invention discloses a compressive property detection device for tempered glass production and a detection method, and relates to the technical field of tempered glass production, the compressive property detection device comprises a bottom plate, the middle position of the upper surface of the bottom plate is provided with a bearing table, and the bearing table is used for placing glass; the pressurizing mechanism is mounted on the upper surface of the bottom plate, vertically corresponds to the bearing table and is used for applying pressure to the glass; the electric sliding table mechanism is installed on the upper surface of the bottom plate, and the moving end of the electric sliding table mechanism moves in the length direction of the bottom plate. And the liquid coating mechanism is mounted on one side of the moving end of the electric sliding table mechanism and is used for coating the surface of the glass with a layer of non-Newtonian liquid so as to prevent the glass from being sputtered all around when the glass is broken. According to the invention, the non-Newtonian liquid is coated on the outer side of the glass, and when the glass is broken in a compression resistance test process, the liquid is rapidly converted into a high-viscosity state due to a shear thickening effect to form a temporary barrier to effectively adhere and capture high-speed flying glass fragments, so that the splashing phenomenon of the glass fragments is obviously reduced.

The utility model relates to the technical field of shelf installation, in particular to an anti-drop shelf supporting seat and a freezer, which comprises a supporting seat body, the top of the supporting seat body is provided with a bearing part for placing a shelf, one side of the bearing part extends to form a limiting buckling assembly for penetrating through the shelf and limiting the moving position of the shelf, and the limiting buckling assembly is provided with a locking part for locking the shelf. A plurality of installation clamping blocks used for limiting the installation position of the supporting seat body are arranged on the side face of the supporting seat body and arranged in the length direction of the side face of the supporting seat body. According to the utility model, the limiting fasteners used for limiting the moving positions of the laminates are additionally arranged, and the laminates are fastened by the limiting fasteners so as to limit the jolting and vibration displacement of the laminates, so that the laminates are not influenced by transportation jolting in the transportation process, the mounting positions are stabilized, the laminates are prevented from falling off, and the service life of the laminates is prolonged. Laminates are prevented from being scattered and damaged to affect the product quality, the stability of the laminates in the transportation process is improved, and the transportation jolt resisting capacity of products is improved.

The invention discloses a trench p-type gallium oxide junction barrier Schottky diode and a preparation method thereof, and mainly solves the problems that an existing gallium oxide Schottky diode is high in on resistance and reverse leakage current and poor in voltage endurance capability and surge resistance capability. The device comprises a cathode ohmic metal layer (1), an n-type heavily-doped gallium oxide substrate (2), an n-type lightly-doped gallium oxide drift layer (3) and an anode Schottky metal layer (4) from bottom to top, and the upper surface of the n-type lightly-doped gallium oxide drift layer is downwards provided with a plurality of grooves (5) so as to change the surface electric field of the device; a p-type gallium oxide region (6) is injected below each groove, and the p-type gallium oxide region (6) and the n-type lightly doped gallium oxide drift layer form a gallium oxide homogeneous pn junction; and a high-k dielectric layer (7) is deposited in each groove. According to the invention, the leakage current is reduced, the reverse breakdown voltage of the device is improved, the on resistance is reduced, the anti-surge capability is improved, and the device can be used for power electronic equipment.

The invention provides a filtering device for milking equipment, and relates to the technical field of separation and filtration, the filtering device comprises a filtering tank, a filter pressing assembly, a suction filtration assembly and a positioning mechanism, a top plate is welded to the top of the filtering tank, an air pump is placed on the surface of the top plate, and one end of the air pump is connected with an air supply pipeline; the air pump is connected with a suction filtration assembly part through an air supply pipeline, the suction filtration assembly is welded to the side edge of the filtering tank, the surface of the filtering tank is in threaded connection with a reduction gear box, and a filter pressing assembly is inserted into the reduction gear box in a penetrating mode. According to the self-cleaning filtering device, the filtering efficiency is further improved while the equipment cost is reduced, self-cleaning treatment can be carried out after filtering is completed every time, the later cleaning difficulty is reduced, it is ensured that the filtering equipment is always kept efficient, and collected residues can be rapidly and automatically discharged after the filtering membrane part is cleaned.

The invention relates to a method and device for detecting the relative displacement of a secondary backstop, a storage medium and a computer program, and the method comprises the steps: installing an image collection device at a position which is relatively static with a reference assembly, and obtaining a to-be-detected image of the secondary backstop through the image collection device; and on the basis of a preset extraction algorithm, feature extraction is performed on the to-be-detected image to obtain characterization features of the target component, and the characterization features are used for characterizing the display position of the target component in the image. Because the image acquisition device is installed at the position which is relatively static with the reference assembly, the characterization feature of the reference assembly in the to-be-detected image is in a static state, and the position of the characterization feature of the reference assembly can be determined in advance. Therefore, based on the position of the characterization feature of the target assembly in the to-be-detected image of the secondary backstop and the position of the characterization feature of the reference assembly of the secondary backstop, the distance between the characterization feature of the target assembly and the characterization feature of the reference assembly can be calculated, and the actual displacement is obtained.

The invention provides an interventional operation magnetic control guide wire capable of repeating magnetic orientation. The interventional operation magnetic control guide wire comprises a core wire and a coating layer, the core wire is coated with the coating layer; the coating layer comprises magnetic composite particles and a first high-molecular polymer; the magnetic composite particles comprise magnetic powder and a low-temperature phase change material compounded on the surface of the magnetic powder. Compared with the prior art, the magnetic control guide wire provided by the invention can perform magnetic orientation after the guide wire is prepared, and magnetic field orientation does not need to be performed in the guide wire forming process, so that the guide wire preparation difficulty is simplified from the process; and meanwhile, magnetic orientation treatment can be carried out again according to requirements. The magnetic control guide wire is simple in production process, capable of achieving repeated magnetic orientation, excellent in magnetic response performance and operation flexibility and suitable for various minimally invasive surgeries and interventional therapy.

The invention discloses a novel fan radial induction area calculation method, and belongs to the technical field of fan calculation. A velocity field of a fan induction area is divided into axial velocity and radial velocity, mathematical analysis is carried out on a radial velocity field, a high-precision numerical simulation result of a fluid mechanics method is fit and calculated according to self-similarity of velocity field distribution, and an eddy current equation is added to model the velocity field, so that velocity distribution of the fan induction area is simulated. By the adoption of the method, the influence of the downstream draught fan on the upstream draught fan is considered, meanwhile, the interaction between the transverse draught fans can be calculated, the defect that an ordinary wind field flow field model does not fully consider the interaction between the draught fans is overcome, the wind field calculation precision is higher, and calculation is more sufficient.

The utility model relates to the technical field of electric automobile charging, in particular to a take-up device of an electric automobile charging pile, which comprises a charging head hung on the charging pile and a charging wire arranged on the charging head, a take-up box is arranged on the charging pile, a winding drum is rotatably arranged in the take-up box, one side of the charging wire is wound on the winding drum, and the other side of the charging wire is wound on the winding drum. A sleeve hole is formed in the bottom of the take-up box and sleeves the charging wire, a torsional spring is sleeved with the winding drum, the two sides of the torsional spring are installed on the winding drum and the take-up box respectively, a ratchet wheel is sleeved with one side of the winding drum, a pawl is obliquely arranged above the ratchet wheel, the top of the pawl is hinged to the take-up box, and the bottom of the pawl makes contact with the ratchet wheel; and an unlocking mechanism for pushing the pawl to rotate is arranged above the pawl. The utility model provides a take-up device of an electric automobile charging pile, which can protect a charging wire, quickly finish wire stretching and take-up operation, prevent the charging wire from being pulled in the charging process, and is used for overcoming the defects in the prior art.

The present invention discloses a method for calibration and coaxial positioning of a dual-manipulator base coordinate system, wherein the dual-manipulator comprises a first manipulator and a second manipulator, and the method comprises the following steps: S1: installing the same calibration device on the two manipulators respectively, and fixing the calibration workpiece on a workbench; S2: moving the first manipulator to the workbench, and aligning the calibration device with the calibration workpiece, and obtaining the posture information of the end of the first manipulator at this time; using the same method to obtain the posture information of the end of the second manipulator; S3: repeating step S2 for multiple times, and then processing the data obtained in step S2 to obtain a calibration matrix; S4: changing the position of the calibration workpiece, repeating steps S2-S4, until the number of changes reaches a preset number of times, and obtaining a final calibration matrix; S5: coaxially positioning the dual manipulators according to the final calibration matrix. The present invention can realize rapid and accurate positioning and calibration of the dual manipulators, and further improve the stability and reliability of the operation.

The utility model relates to a wall seat structure for installing and fixing a sunshade, which belongs to the technical field of the sunshade and comprises an arm seat frame connecting piece, a transition connecting block is arranged at the front end of the arm seat frame connecting piece, and a bolt through hole connected with the arm seat frame connecting piece through a screw and nut structure is arranged on the transition connecting block. The arm seat frame connecting piece comprises an inserting block, an adjusting connecting block integrated with the inserting block is arranged at the front end of the inserting block, and a U-shaped fixing groove penetrating through the bolt is formed in the adjusting connecting block. The device has the characteristics of simple structure, convenience in installation and high structural strength. The wall body fixing part and the sunshade arm connecting part are connected through the movable transition pivot, so that angle fine adjustment after installation is achieved, and different sunlight irradiation angles or storage requirements are met.

The application relates to the technical field of game handles, and particularly discloses a game handle grip, which comprises a handle body and a grip, a connecting piece is arranged between the handle body and the grip, the handle body is movably connected with the grip through the connecting piece, and the handle body and the grip are contacted or separated under the action of external force; one of the grip and the handle body is provided with a locking piece, and the other is provided with a matching part; the locking piece moves relative to the matching part, and is used for locking or unlocking the handle body and the grip when the grip and the handle body are contacted; an elastic piece is arranged between the handle body and the grip, the elastic piece is connected with the handle body and the grip respectively, is used for releasing elastic force when the handle body and the grip are unlocked, and is used for separating the handle body and the grip under the action of external force. The handle body and the grip are locked to improve the stability of the product, and there is a gap between the handle body and the grip when being unlocked, so that a protective sleeve or a decorative sleeve can be installed according to requirements, thereby improving the overall flexibility of the product.

The embodiment of the utility model discloses biopsy forceps. The biopsy forceps comprise: a forceps head assembly; the handle assembly comprises a handle and a sliding piece, the sliding piece is arranged on the handle in a sliding mode, a clamping part is arranged on the sliding piece, a matching part is arranged on the handle, and the clamping part and the matching part are connected in a clamping mode to lock the sliding piece; the catheter assembly comprises a push-pull piece, and the two ends of the push-pull piece are connected with the forceps head assembly and the sliding piece respectively; when the sliding piece slides along the handle, the sliding piece drives the push-pull piece to open or close the tong head assembly, and when the sliding piece slides to enable the clamping portion and the matching portion to be connected in a clamped mode, the tong head assembly is locked in the closed state. The biopsy forceps can effectively control clamping and loosening of the forceps head assembly and prevent a sample from falling off.

This utility model discloses an integrated transition yaw connection system for wind turbines, belonging to the technical field of wind power generation equipment. The system includes a wind turbine tower, a slewing bearing, a short-section cylinder, and a lower platform. The wind turbine tower has a truss-type hollow structure. The short-section cylinder is vertically arranged and its top is welded to the lower platform as a whole. Its bottom is connected to the top of the tower through the slewing bearing. This utility model uses a hierarchical structure of truss tower-slewing bearing-short-section cylinder-platform. It utilizes the short-section cylinder to distribute the nacelle load and compensate for installation errors. Combined with the slewing bearing, it achieves low-friction and stable yaw. This structure effectively solves the problems of heavy self-weight, obvious yaw vibration, complex assembly, and easy wear of connection parts of traditional wind turbine towers. It has the advantages of lightweight, stable yaw, convenient installation, and long service life.

The invention provides a control method and device for a network-forming type grid-connected converter. According to the output voltage stable value of the grid-connected converter under the two-phase rotating coordinate system and the current reference value of the filter inductor under the two-phase static coordinate system, the voltage and current inner loop control of the grid-connected converter is realized, the control performance of the grid-connected converter can be improved, and the stable operation of the grid-connected converter is ensured. According to the invention, the actual value of the output voltage of the grid-connected converter under the two-phase static coordinate system is calculated according to the actual value of the current of the filter inductor and the actual value of the voltage of the primary winding, so that the state feedback control of the grid-connected converter is realized, and the dynamic characteristics of the grid-connected converter can be improved. And the control dimension of the network construction type grid-connected converter can be effectively increased.

The invention discloses a video content management method based on a multi-modal model, computer equipment and a medium, and belongs to the technical field of multimedia, and the video content management method based on the multi-modal model comprises the following steps: after extracting an original key frame picture from at least one video clip, obtaining a timestamp and a time point of the original key frame picture; according to the method, repeated picture content and invalid picture content of an original key frame picture are removed, then a blank screen picture is removed, vectorization processing is carried out through a CLIP model, vectorized data are obtained, automatic voice recognition is executed, and finally video metadata is generated. According to the video content management method based on the multi-modal model, video content retrieval service based on pictures or characters can be provided, delicacy management of videos is achieved, video content retrieval based on frame levels is provided, the accuracy of video content retrieval is improved, and millisecond-level retrieval of mass video content is supported.

The embodiment of the invention provides a distributed database monitoring method and device, computer equipment and a storage medium, and belongs to the technical field of database management. The method comprises the steps of obtaining multiple pieces of operation state information corresponding to multiple preset operation monitoring indexes in a distributed database, wherein the preset operation monitoring indexes are indexes having influences on stable operation of the distributed database; displaying each piece of operation state information in the plurality of pieces of operation state information in a corresponding visual panel of a preset operation monitoring index; and when the operation state information under any target operation monitoring index in the plurality of preset operation monitoring indexes indicates that the business service pressure of the distributed database under the target operation monitoring index is greater than or equal to a pressure threshold value associated with the target operation monitoring index, the distributed database operates according to the pressure threshold value. And displaying the alarm prompt information in a visual panel of the target operation monitoring index. According to the embodiment of the invention, the capability of ensuring the TIDB database to provide stable services can be improved.

The utility model discloses a saccharification pile oxygen introducing device in the technical field of white spirit brewing, which comprises a vertical pipe and a coil pipe, the vertical pipe is vertically arranged, the top end and the bottom end of the vertical pipe are sealed, a plurality of exhaust holes penetrating through the inner wall and the outer wall are formed in the peripheral side of the vertical pipe, and a connecting hole penetrating through the inner wall and the outer wall is formed in the bottom end of the vertical pipe. A plurality of vent holes penetrating through the inner wall and the outer wall are formed in the circumferential side of the coil pipe, an air inlet in one end of the air conveying pipe is connected with the air supply device, and the other end of the air conveying pipe is connected with the pipe opening in the outermost ring of the coil pipe. The saccharification pile oxygen introducing device solves the technical problems that fermentation is insufficient and sauce fragrance is not prominent enough due to the fact that the oxygen content of the fermentation pile core and the pile bottom of an existing saccharification pile is low, and is simple in structure and capable of improving the oxygen content of the pile core and the pile bottom of the saccharification pile.

The invention relates to a multi-thread collaborative execution method based on a double linked list, and belongs to the technical field of computers. The method comprises the following steps: constructing a data structure based on business scene requirements; the data structure is a double linked list; when the node state corresponding to the first node in the data structure is successful and the execution condition corresponding to the second node is satisfied, executing the thread corresponding to the second node, and switching the node state of the third node into monitoring; and when the node states of all the nodes in the data structure are successful, stopping executing the threads in the data structure. According to the multi-thread collaborative execution method based on the double linked list, accurate thread concurrency control can be achieved by combining the double linked list and the node state, all the threads can be automatically triggered according to the specified conditions and sequence, the complexity and the coding difficulty of a thread concurrency control scene are simplified, and the thread concurrency control efficiency is improved. The method can be used in scenes requiring multi-thread cooperative work.

The pathological tissue bottle comprises a tissue bottle body, a tissue bottle cap is installed on the top of the outer side of the tissue bottle body, a biological tissue leakage net box is installed in the tissue bottle body, and the top of the biological tissue leakage net box is connected with a biological tissue leakage net cover. The utility model has the beneficial effects that the leakage net structure is utilized to fix fine biological tissues, meanwhile, the stability and firmness of the leakage net are ensured, the storage scheme of clinical biological tissues is optimized, the overall biological tissue treatment process is integrated, and the treatment efficiency of the biological tissues is improved. The difficulty of manual processing operation is greatly simplified, the sampling and inspection process becomes more convenient, and the method has the advantages of convenience, high stability and standardization.

The utility model provides a communication power supply cabinet convenient to maintain, which belongs to the technical field of power supply cabinets and comprises a cabinet body, a front side wall surface and a rear side wall surface of the cabinet body are respectively hinged with a front door and a rear door, a heat dissipation assembly is arranged on the rear door, a support is arranged in the cabinet body, and wire cards are arranged on inner wall surfaces of two sides of the cabinet body. The power supply cabinet solves the problems that internal components of a conventional power supply cabinet can continuously release heat during use, and a heat dissipation assembly in the power supply cabinet is poor in heat dissipation effect, so that the internal temperature of the power supply cabinet is too high, effective heat dissipation cannot be performed, the components are possibly damaged, the working efficiency is influenced, and the power supply cabinet is damaged. And meanwhile, the number of cables which can be arranged in the upper pressing groove and the lower pressing groove is limited, and the cable at the upper end needs a relatively long length when being arranged by utilizing the upper pressing groove and the lower pressing groove, so that the problems of relatively high arrangement difficulty and low practicability are solved.

This invention belongs to the field of photovoltaic panel cleaning technology, specifically relating to an intelligent cleaning device and method suitable for large-angle flexible photovoltaic roofs. The intelligent cleaning device for large-angle flexible photovoltaic roofs includes an anchoring and traction system and a cleaning robot body. The anchoring and traction system includes a winch assembly installed on the roof, a composite cable connected to the winch assembly, and a central control unit. The composite cable integrates a traction rope, a power supply cable, and a water supply hose. The cleaning robot body is connected to the winch assembly via the composite cable and includes a walking and adsorption mechanism, an intelligent adsorption pressure control system, and a cleaning mechanism. The walking and adsorption mechanism is a tracked vacuum suction cup composite walking mechanism. The intelligent cleaning device for large-angle flexible photovoltaic roofs of this application enables safe, stable, and efficient fully automated cleaning operations on the surface of large-angle, flexible photovoltaic panels using the cleaning robot body.

The utility model discloses a single-double sharing type cable clamp which comprises a base, a first cover plate is hinged to one side of the base, a second cover plate is hinged to the other side of the base, a first hinge joint is arranged at the free end of the first cover plate, and a second hinge joint is arranged at the free end of the second cover plate; the cable clamp further comprises a third cover plate, one end of the third cover plate is provided with a first hinge joint, and the other end of the third cover plate is provided with a second hinge joint. In a single-cable installation mode, the third cover plate is cancelled, and the first cover plate and the second cover plate are connected through the first hinge joint and the second hinge joint; in a double-cable installation mode, the first cover plate and the second cover plate are unfolded, one end of the third cover plate is hinged to the first cover plate, and the other end of the third cover plate is hinged to the second cover plate; compared with the prior art, the cable laying clamp can be freely switched between double-wire laying and single-wire laying according to actual working conditions, cable laying requirements under different working conditions are met, and the adaptability of the clamp is improved.

The invention discloses a building energy consumption prediction method and system based on multi-factor decomposition, a terminal and a medium, and relates to the technical field of building energy consumption prediction. According to the technical scheme, multiple factors influencing building energy consumption are divided into environmental conditions considered from a global perspective, energy consumption activities considered from a local perspective and behavior characteristics considered from details; under the condition that the overall trend that the building energy consumption is influenced by the environmental conditions is represented through the basic power utilization data and the power utilization variable coefficient function, the correlation influence among the energy consumption activity, behavior characteristics and the environmental conditions is mined, and accurate prediction of the building energy consumption can be achieved through limited sample data.

The utility model provides a photomask which comprises a graphic layer, the graphic layer comprises a main graphic area and a non-main graphic area, and the non-main graphic area is arranged around the main graphic area; four alignment patterns are arranged on the upper surface of the non-main pattern area at intervals, and the main pattern area is located in a rectangular area defined by the midpoints of the four alignment patterns; the alignment pattern comprises a rectangular frame, two first patterns and a second pattern are arranged in the rectangular frame, and the second pattern is arranged between the two first patterns. The alignment pattern can be attached to a photomask provided by each supplier. When the photomasks need to be aligned, the photomasks only need to be aligned according to the alignment patterns, alignment does not need to be performed according to different alignment patterns of different suppliers, and the difficulty of alignment of the photomasks is simplified. The unexpected effects are that the alignment efficiency of the photomask is improved, and the error rate of operators is reduced.

The invention discloses a data set generation method and system for converter harmonic coupling feature learning, and the method comprises the steps: determining the access capacity and position of a power electronic converter in a power distribution network, randomly generating m groups of multi-frequency harmonic voltages under the amplitude limitation, and defining the distance between two groups of harmonic voltages; calculating to obtain a distance matrix among all harmonic voltage data, and according to a traversal rule, carrying out small signal superposition on m groups of data in sequence; obtaining a steady-state equation coefficient matrix; dividing the harmonic voltage at the converter as large disturbance into a plurality of stages, and calculating the small disturbance response of each state variable of the small signal equation under the harmonic voltage disturbance at each stage; superposing the small disturbance response of each state variable solved in the stage into a steady-state component of the state variable, and updating a small signal equation set of the system; and superposing the disturbance of the next stage, repeating until the amplitude of the harmonic voltage disturbance is the same as the set target, and finally obtaining the harmonic coupling characteristics of the converter under m groups of random harmonic voltage data.

The invention relates to the field of medicine, and provides a sudden cardiac death diagnosis model and a construction method thereof, and the method comprises the steps: collecting data samples, and constructing a training set based on the data samples, the training set comprises diagnosis features, and the diagnosis features represent that the data samples in the training set are sudden cardiac death; performing data interpolation and variable screening on the diagnosis features in the training set; a logistic regression model is constructed based on the training set, independent variables of the logistic regression model are diagnosis features, and dependent variables of the logistic regression model are diagnosis results of samples corresponding to the diagnosis features; and constructing a diagnosis calculator based on the logistic regression model, wherein the diagnosis calculator inputs the received characteristic values into the logistic regression model to diagnose sudden cardiac death. The sudden cardiac death diagnosis method and device are used for overcoming the defect that a diagnosis result is not accurate enough mainly depending on subjective experience of a forensic when sudden cardiac death diagnosis is carried out at present, and the sudden cardiac death diagnosis method and device can carry out accurate diagnosis on sudden cardiac death.

The utility model discloses a working mechanism with multiple rotating heads, which solves the technical problems of low working efficiency and poor effect of an electric tool with a single working head in the prior art. The multi-rotating-head working mechanism comprises a driver, a plurality of rotating heads and a planetary gear assembly, the planetary gear assembly comprises a main shaft, a planet carrier, a plurality of planetary gears, a plurality of rotating shafts and fixedly-arranged meshing units, the rotating shafts are rotatably arranged on the planet carrier, and the meshing units are fixedly arranged on the main shaft. The planetary gears, the rotating shaft and the rotating head rotate synchronously, the rotating head is arranged below the planet carrier, the driver is in transmission connection with the main shaft, the planet carrier is installed on the main shaft and rotates synchronously with the main shaft, and the meshing unit is meshed with the multiple planetary gears. And the planet carrier rotates to drive the plurality of planet gears to revolve around the axis of the main shaft and enable the plurality of planet gears to rotate around the axis of the rotating shaft. The utility model further provides an electric tool which adopts the multi-rotating-head working mechanism in the technical scheme.