51results about How to "Solve decoupling" patented technology

The invention relates to a multi-parameter combined estimation method based on bi-static FDA-MIMO radars. The method comprises the following steps: firstly designing a transmitting signal by utilizing characteristics of FDA and MIMO radars; carrying out matched filtering, vectorization and spatial smooth processing on a receiving signal; then estimating a combined steering vector and estimating a DOA and a speed parameter by utilizing an ESPRIT algorithm, and carrying out decoupling and parameter estimation on the DOD and distance information by combining characteristics of a transmitting waveform; and carrying out ambiguity resolution on a distance result estimated by utilizing an ESPRIT algorithm and combining a distance estimated by virtue of a pulse delay estimation algorithm, and carrying out ambiguity resolution on a speed by virtue of an MUSIC algorithm by combining signal characteristics of a large number of pulses. The method provided by the invention has the advantages that the problem that the distance and speed can not be accurately estimated under the condition of a single PRF can be effectively solved, and the estimation of the three-dimensional position and speed of a target can be realized; and a simulation result shows that the method provided by the invention has good estimation accuracy and stability.

The invention discloses a suspension type monorail vehicle dynamic model and a vehicle-bridge coupling power simulation method, belongs to the technical field of rail traffic and aims to solve the technical problem that an existing suspension type monorail dynamics simulation device is large in simulation result errors during rail beam local vibration research. By providing the suspension type monorail vehicle system dynamic model, a rubber wheel-rail surface contact mechanical model, a rail beam bottom plate and web equivalent surface force application method and a vehicle and rail beam coupling dynamic model building method, a suspension type monorail vehicle-rail beam coupling dynamic simulation system is built. By the model, the system and the method, suspension type monorail vehicle system suspension mechanism decoupling and equivalent treatment are achieved, and the technical problems that the existing suspension type monorail dynamics simulation device is large in simulation result errors during the rail beam local vibration research, rail beam dynamic stress and strain results are hard to extract, rail beam local strength destroying cannot be evaluated accurately and the like are solved.

The invention provides a method for optimizing skins of an airplane airfoil by a subsonic flutter based on a network computing platform. The method provided by the invention can take elements of each skin of the airfoil as objects to be optimized and also selects layering angles, layering thickness increment and layering positions as design variables; and a search which guarantees a genetic algorithm is processed in a space area comprising all possible solutions. The process of optimizing utilizes a double-circulation flow so that a decoupling problem of great design variables (more than 1000) is solved and also utilizes a 'small increment valley-filling method' to effectively avoid the oscillation of the algorithm so that a high repeatability of the algorithm is assured. The method provided by the invention is integrated into a gridding platform so that the method not only can solve the problem that the hardware-software resource is not enough, but also can solve the problem that thetime of the genetic algorithm is too long through a parallel computing.

The invention aims at providing a method, a proxy server and a client for specifying an IP address, by obtaining a connection request message which comprises a specified IP address and an address anda port number of a target server from the client, then, according to the address and the port number of the target server, establishing a connection with the target server through the specified IP address, a problem that the current proxy services all cannot support specifying of a source IP can be solved, the client can specify the proxy server to communicate with the target server through a specific IP, and some requirements of needing the specific IP can be satisfied. Moreover, the IP address is specified through establishing the connection between the client and the proxy server based on aSOCKS5 protocol and extending the latest network general proxy protocol of SOCKS5, thus, the specifying is compatible to protocols of various application layers while the requirement of specifying the IP address by the client is satisfied, and the specifying is convenient and universal.

The invention relates to a leveling and focusing mechanism and a mask platform with the same. The leveling and focusing mechanism comprises a bulb differential fine-tuning mechanism and a leveling reed, wherein the bulb differential fine-tuning mechanism is spherically connected to the edge of the leveling reed through the bulb; the edge of the leveling reed is arranged below a base of the mask platform; and the bulb differential fine-tuning mechanism and the middle part of the leveling reed are arranged above a machine frame. The leveling and focusing mechanism provides a vertical regulating mechanism through differential threads, wherein the vertical regulating mechanism has simple structure and precision at micron level and is convenient in operation. In the leveling and focusing mechanism, the problem of decoupling along Rx and Ry directions is solved by combining the spherical connection with flexible hinge. In the invention, the complex of vertical regulating scheme of a mask platform sub-system can be greatly reduced under the condition of ensuring micron-level regulating precision and the vertical mounting height between the mask platform sub-system and the machine frame can be greatly saved.

The invention discloses a 12 / 4 pole single winding bearingless switch reluctance motor and a control method thereof. The motor comprises a stator with 12 gear poles and a rotor with 4 gear poles; each pole of the stator winds a set of excitation windings; the rotor winds no winding; the rotor gear is wider than the stator gear by 30 degrees to enable each inductance to have a maximum induction flat-top area with 1 / 3 period. When the motor is in motor-driven operation, if the two phases in an inductance rising area and an inductance flat-top area are communicated simultaneously, the phase in the inductance rising area can produce a torque, and the phase in the inductance flat-top area can produce a suspension force; when the motor is in motor-driven operation, if only the phase in the inductance flat-top area is communicated, four windings of the phase are individually controlled to produce the suspension force and to provide excitation for the electricity generation stage, and later to generate electricity in an inductance drop area with follow current. The method controls the suspension force and the torque regionally, realizes the decoupling of the suspension force and the torque, simplifies the control algorithm, improves the radial bearing capacity and the high-speed adaptability of the motor, has generality and popularization in structure, and enables the field of the bearingless switch reluctance motor to gain a new development.

The invention discloses a large-scale civil aircraft power supply and distribution system ground test integrated verification test platform architecture, which constructs a large-scale distributed measurement and control system based on Ethernet, achieves exchange of network data based on a multi-machine synchronous data acquisition technology and a Client-Server technology, achieves system time nanosecond synchronization under a distributed network structure, and guarantees homology and synchronization between power distribution control logic communication data and measurement data. A digitalsimulator based on a flight profile function of an aircraft is adopted, which solves the problem of decoupling between an aircraft electrical system and avionics and other systems in a ground test and achieves cross-linking measurement and control of the aircraft electrical system, the avionics and the other systems and a man-machine interface verification function of a power supply system and apilot operation program. By the adoption of the integrated verification test platform architecture, reliable experimental basis and means can be provided for design optimization and fault location ofthe electrical system of the large-scale civil aircraft.

The invention relates to a seed paper tape sowing method. A seed paper tape is prepared by the steps of sending a paper tape into a paper tape conveying device by a paper tape feeding device, enabling the paper tape to move from an inlet to an outlet at a constant speed along with a conveyor belt of the conveying device, sequentially fixing a dispensing device, a seed spreading device and a spread seed blowing device above the conveyor belt, fixing a spread seed collecting device, corresponding to the spread seed blowing device, below the conveyor belt, and fixing a seed paper tape finished product packaging device at the outlet end of the conveyor belt. The seed paper tape sowing method comprises the steps of 1, firstly, leveling soil; 2, removing a plastic package from a seed paper tape finished product and tiling the seed paper tape; 3, covering with soil, namely after the seed paper tape is sowed, uniformly covering the tiled seed paper tape with soil; and 4, watering and irrigating. The seed paper tape sowing method provided by the invention has the advantages of solving the problem of separation of high-quality seeds with good methods, being beneficial to the integration of propagating, breeding and promoting of high-quality seeds, facilitating the simplified sowing, saving high-quality seeds and labor force, and enabling the cost to be reduced and the benefit to be increased.

The embodiment of the invention discloses a data interaction processing method, apparatus and system. The method includes the steps of a sending terminal sending a request message including business data and preset overtime processing time to a message middleware, the message middleware sending the request message to a receiving terminal, the receiving terminal determining whether the preset overtime processing time in the request message is late than the current time, if yes, the receiving terminal conducting corresponding business processing for the business data in the request message, the receiving terminal sending feedback message of the business processing result to the message middleware, the message middleware sending the feedback message to the sending terminal, and the sending terminal conducting corresponding business advancing processing based on the feedback message of the business data. The technical scheme provided in the embodiment can not only effectively ensure the final consistency of communication objects on business data interaction processing results, reduces the coupling degree between communication objects, and solves the problem of excessively large flow of business requests.

The invention provides an acquisition adapter management method and system and relates to the field of centralized telecommunication network management. The problem that an existing NMS and an existing CAMS cannot be completely decoupled with a northbound interface of a managed system is solved. The acquisition adapter management method comprises the steps of packaging an adapter program of the northbound interface of the managed system, a service data model file and a northbound interface dependent file to form a CAPP; establishing a CAPE corresponding to the CAPP after the CAPP is installed on the CAMS; performing data communication between the managed system and the NMS. The acquisition adapter management method and system are suitable for a network management system and achieve the NMS and the CAMS compatible with the northbound interfaces of various types of managed systems.

The invention relates to a normalized multi-end-member decomposition hyperspectral reconstruction method in a pixel unmixing inverse process. The method is characterized by comprising the following steps that: a reflectivity image of a multispectral image is subjected to normalized multi-end-member decomposition to obtain hyperspectral data; and a ground object spectrum extracted from the multispectral image can be decomposed into two intrinsic linear combinations of the spectral shape and the pixel DN value. The normalized multi-end-member decomposition hyperspectral reconstruction method is characterized in that the mixing in different properties is carried out according pure end members in a spectral library to obtain the optimum end member components in a mixed scene, so phenomena of noise amplification due to too many end members and the precision reduction due to too few end members can be avoided; the temporal and spatial variation of the end members is considered on the precise unmixing basis; and the hyperspectral data is accurately reconstructed when the calculation quantity is reduced. Through the spectral reconstruction on the multispectral data, the continuous hyperspectral data can be obtained; and the high space resolution and the high signal-to-noise ratio of the multispectral image are remained, and meanwhile, the spectral resolution of the multispectral data is improved.

The invention discloses a transient traveling wave time domain calculating method of a same-tower double-circuit DC power transmission line. The method includes the following steps of calculating the series impedance matrix Z and the parallel impedance matrix Y of the line at different frequencies, the eigenvector matrixes TU, TI of the matrixes ZY and YZ, and an eigenvalue matrix Lambda; calculating the vector wave impedance matrix Zc-phase and the sequential wave impedance matrix Zc-phase-r according to the matrixes Y, TI, and Lambda; performing vector fitting on the matrixes TU, TI, TU-1, and TI-1 to obtain TU-r, TI-r, TU-r-1, and TI-r-1; performing vector fitting on the propagation coefficients exp (-gamma Mm) of the forward wave of different moduli to obtain a sequential propagation coefficient matrix Hm-r of the corresponding m mold; determining the fault type according to the circuit structure of the fault points to write the boundary equation; and calculating the line fault transient electrical amount. The method takes into account the influence of the frequency variation of the line parameters, and solves the problem of the line decoupling caused by the unbalanced same-tower double-circuit DC line.

The embodiment of the invention provides a method, a device and electronic equipment of data consistency comparison and a readable storage medium, which can improve reusability, maintainability and scalability of a data consistency comparison tool. The data consistency comparison method of the embodiment of the invention includes: parsing original data obtained from data sources, and assigning thesame to data objects; mapping the data objects to abstract data with a uniform format according to a mapping rule; and carrying out comparison of consistency of the abstract data of the different data sources.

The invention belongs to the technical field of vegetable waste disposal through biological fermentation, and particularly relates to a semi-tensor product temperature control method for vegetable waste fermentation. Aiming at a special complex system of microbial fermentation, fuzzy optimization control is performed on the temperature of vegetable waste fermentation by applying a matrix semi-tensor product theory, an input variable and an output variable are fuzzified, and the input variable and the output variable are expressed in a logic form by the matrix semi-tensor product theory and used as a fuzzy rule base; the fuzzy rule base is sorted and optimized, and matrix operation and minimum in-degree reduction of semi-tensor product are carried out to obtain a structure matrix to express the fuzzy relation between the input variable and the output variable; and the input variable is fuzzified, the structure matrix is used to perform fuzzy reasoning to obtain a reasoning output variable, and defuzzification operation is performed on the output variable to obtain an actual control output parameter to control an output actuator.

The invention discloses a flexible anti-abrasion coupler joist device, and relates to the technical field of locomotive connecting devices, in particular to a heavy haul train locomotive coupler joist device. The device comprises a bearing frame, a buffer suspender and a bearing structure, the two buffering hanging rods are connected with the two side portions of the bearing frame through hinged shafts correspondingly. A transverse joist of the bearing structure is of a strip-shaped plate structure, bolt holes are not machined in the two ends of the transverse joist, and the transverse joist is connected with the lower end of the buffering suspender through the bolt holes and bolts. The saddle-shaped bracket is of a frame structure and is arranged in the middle of the transverse bracket; the fixed locking plate is of a strip-shaped plate structure, is longitudinally inserted into the saddle-shaped bracket from the lower part of the transverse supporting beam, and is locked and positioned through a lock pin; the two bearing rollers are arranged on the two sides of the upper portion of the saddle-shaped bracket through pin shafts and used for bearing the car coupler. According to the device, the problems that in the prior art, an existing heavy-load locomotive is often unhooked, and meanwhile the maintenance and use cost is increased due to the fact that the coupler joist is greatly abraded are solved.

The invention provides motor driven equipment. The motor driven equipment comprises magnetic axis components, at least two coil components and a connecting piece, wherein the magnetic axis components comprise a plurality of permanent magnets which are sequentially arrayed in preset magnetic axis extension directions; the coil components form permanent magnet linear motors with the magnetic axis components; air gaps are formed between the coil components and the magnetic axis components; and the connecting piece connects the at least two coil components and therefore is driven jointly by the at least two coil components. The motor driven equipment is characterized in that a ratio hm / delta of the length hm of each permanent magnet in a magnetizing direction of the permanent magnet to the length delta of each air gap is set in a basically even saturation zone of a relation curve of a ratio B delta / Br of air gap flux density B delta to residual flux density Br of each permanent magnet with the change of hm / delta. Therefore, the problem that the linear motors cannot operate consistently and synchronously due to the difference of the permanent magnets of the linear motors is avoided.

The invention discloses a heat input adjustable consumable electrode arc additive manufacturing method and device. In the device, a consumable electrode welding gun, a consumable electrode welding power supply and a workpiece are connected in series to form a consumable electrode arc loop of a consumable electrode arc additive. A TIG welding gun, a TIG welding power supply and the workpiece are connected in series to form a non-consumable electrode arc loop. The TIG welding gun, the consumable electrode welding gun and the TIG power supply are connected in series to form a bypass arc loop. Theconsumable electrode loop is associated with the non-consumable electrode loop and the bypass arc loop through an intelligent circuit switcher. The TIG welding gun is provided with a temperature sensor, the temperature sensor is connected with the intelligent circuit switcher, and the intelligent circuit switcher correspondingly adjusts current according to received temperature signals. By meansof the provided method and device, the problem about decoupling of the relation between consumable electrode arc additive heat input and the deposition amount is solved, regulation and control of theconsumable electrode arc additive heat input are achieved on the premise that the deposition efficiency is not changed, heat accumulation and heat insufficiency in the additive process are avoided, and the forming quality of an additive piece is improved.

The invention relates to a motor tractor with a limit function. The motor tractor comprises a motor tractor body and a traction limit structure, wherein the traction limit structure comprises a traction limit structure body, a supporting rod and a control component. A limiter is arranged on the traction limit structure which is fixedly connected with the motor tractor body through the supporting rod, and the control component is mounted on the supporting rod and connected with the limiter and the motor tractor body. According to the motor tractor, a storage battery provides traction power fordriving wheels, after a trailer is mounted on a fixing hook of the motor tractor, an operator controls the traction limit structure through a traction lock rod, decoupling of the trailer is prevented,the operator controls operations such as moving, steering and braking of the motor tractor through a handle, the operation process is convenient and safe, the trailer cannot slip, safety of the operator is protected, and damage to a traction object caused by decoupling is avoided.

The invention relates to a distribution type multi-core heterogeneous system. The multi-core heterogeneous system is characterized by being composed of a plurality of platforms of different kinds, wherein the multiple platforms are connected through communication network; vehicle processing modules which realize different functions are configured on the multiple platforms correspondingly; and themulti-core heterogeneous system comprises the first platform which is composed of one or a plurality of FPGA, the second platform which is composed of one or a plurality of GPU and the third platformwhich is composed of one or a plurality of MCU. According to the distribution type multi-core heterogeneous system, superposition of the calculation capacity of the multiple platforms can be used forimproving the perception precision, optimizing the system calculation resource use efficiency and improving the system stability, and the distribution type multi-core heterogeneous system can meet theprecision requirements of L4 grade automatic driving perception fusion.

The embodiment of the invention relates to password processing equipment and a control method and device of the password processing equipment. The password processing equipment comprises a dynamic configuration area and a static configuration area, the dynamic configuration area is provided with a service processing module, and the static configuration area is provided with a password processing module; the service processing module can dynamically configure different service processing files, the service processing files correspond to the service scenes, and the service processing module is used for obtaining service data to be subjected to password processing based on the service processing files and sending the service data to be subjected to password processing to the password processing module; and the password processing module is used for performing password processing on the service data to be subjected to password processing based on a password algorithm, and feeding back the service data subjected to password processing to the service processing module. According to the embodiment of the invention, the service processing files of different service scenes can be dynamically loaded in the password processing equipment, and the universality of data encryption or decryption processing on different service scenes is improved.

The invention presents a maritime release hook which comprises a body, a left hanging wall, a right hanging wall, a sliding block, a spring, hydraulic wheels, a traction rope and a bow shackle. The upper end of the body is fixedly connected with the bow shackle through a pin shaft, and the lower portion of the body is connected with the left hanging wall and the right hanging wall through pin shafts. The two hanging walls are both provided with hook-like structures and pin shaft holes, and the hook-like structures and the pin shaft holes are matched mutually to form a hook structure capable ofbeing closed and opened. The upper portion of the sliding block is provided with two clamping grooves with lower turnup edges. The lower edges of the clamping grooves are provided with bevels. A sliding block body is located between supporting rod structures. The supporting rod structures are attached to the bevels, and the top ends of the supporting rod structures are located in the clamping grooves. The traction rope extends into the body, and is transited through the hydraulic wheels and then connected to the upper end face of the sliding block along the axis of the spring. The traction rope pulls the sliding block to compress the spring in the axial direction of the spring, the supporting rod structures are opened by the bevels of the lower edges of the clamping grooves of the slidingblock, and the closed hook structure is opened. According to the maritime release hook, the problem that during maritime product craning-deploying, operators need to enter water to release the hook is solved.

The invention provides a fixing pipe clamp and relates to the field of wiring harness or pipeline fixing devices. A pipe clamp body comprises an enclosed portion which is used for forming a to-be-clamped object penetrating hole; matched buckle structures are disposed at the two buckling ends of the enclosed portion; each buckle structure comprises a clamping hook and a clamping connecting portionwhich is matched with the clamping hook; more than two sets of buckle structures are arranged; each set of buckle structure is arranged in the axial direction of the to-be-clamped object penetrating hole; the clamping hooks of the two adjacent sets of buckle structures are arranged at the two different buckling ends correspondingly; and the projections of the two clamping hooks of the two adjacentsets of buckle structures have a coincidence portion on a plane which is perpendicular to the axis of the to-be-clamped object penetrating hole, and the clamping connecting portions at the two buckling ends can block each other during face-to-face movement in the axial direction of the to-be-clamped object penetrating hole by means of the coincidence portion. The problems that the upper portion of the fixing pipe clamp body is twisted when axial side motion occurs to a pipeline or a wiring harness, and consequently unhooking is prone to occurring to the buckle structures of the fixing pipe clamp are effectively solved.

The invention belongs to the field of robot control, and provides a real-time tracking control method for a Cartesian space moving target of a six-degree-of-freedom mechanical arm, which comprises the following steps of: acquiring Cartesian space poses of a moving target and an end effector of the mechanical arm, calculating a Cartesian pose error, establishing an adjustable gain for the Cartesian pose error, and performing superposition calculation; a virtual power source applied to an end effector of the mechanical arm is calculated according to the error scaling coefficient; establishing a mechanical arm dynamic model with optimized virtual conditions, calculating the angular acceleration of each joint of the mechanical arm, and integrating the angular acceleration to obtain the angular velocity of each joint of the mechanical arm and the angle of each joint of the mechanical arm; and carrying out loop iteration solution and continuously outputting all joint angles of the mechanical arm to control an end effector of the mechanical arm to move towards the moving target, and completing real-time tracking of the Cartesian space moving target of the mechanical arm. According to the method, the dynamic target in the six-degree-of-freedom direction of the three-dimensional space can be stably tracked, adjustable gain parameters and error scaling parameters are provided, and rapid, accurate or smooth and stable dynamic target tracking is achieved.

The invention discloses an authority design method and system based on SaaS multi-tenant, equipment and a storage medium, and the method comprises the following steps: creating a User table, and storing a user under each tenant; creating a Roles table, and storing system roles; creating a Permissiones table, and storing an authority point corresponding to each system role; creating a User_roles_mapping table, and storing a corresponding relationship between the user and the system role; creating an Accounts table, and storing an accessible data set; creating an Operation table, and storing a corresponding relationship between the accessible data set and the system role; and according to the User table, the Roles table, the Permissiones table, the User_roles_mapping table, the Accounts table and the Operation table, carrying out user permission allocation. According to the invention, a more scientific and reasonable authority distribution method is provided, and roles, function authorities and data authorities are decoupled to a greater extent under the background of multiple tenants, multiple roles and multiple data.

The invention belongs to the technical field of geotechnical experiments, and particularly relates to a triaxial shearing and seepage integrated experimental method for hydrate-containing sediments. The method comprises the following steps: (1) generating hydrate; (2) preparing a shearing and seepage coupling experiment; (3) carrying out an experiment. The special integrated experimental device is utilized, seepage and stress coupling analysis in the hydrate triaxial shear failure process can be achieved, and different seepage experiments of liquid and gas and liquid can be achieved.

The invention provides a real-time simulation method and device for an electromagnetic transient state of a wind power plant. An equivalent impedance value of a wind turbine generator system is determined based on an electromagnetic transient characteristic curve of a wind power plant; equivalent construction of a wind power plant equivalent model is carried out on the wind turbine generator system by using the equivalent impedance value; and electromagnetic transient state simulation is carried out on the wind power plant based on the wind power plant equivalent model. The method and device are easy to implement. The simulation precision is improved and the simulation time is shortened; and a problem of alternating-current convergence line coupling during the modeling and simulation process of the wind power plant is solved. The established wind power plant equivalent model enables the wind power plant to be equivalent to a few of limited wind turbine generator systems, so that the actual model of the wind power plant is simplified substantially; the simulation of the super-large-scale wind power plant or the wind power plant collection system is realized; and the real-time simulation capability of the wind power plant is improved substantially.

The invention belongs to fishing gear products, and discloses an anti-hooking spring fishhook. The anti-hooking spring fishhook aims to solve the problems that a fishhook hooks debris such as rubble, aquatic weeds and branches and a fish struggles to get unhooked after biting the fishhook in the fishing process, which often occur in the fishing process. The anti-hooking spring fishhook is characterized by comprising an anti-hooking barrel 4, a hemispheric cover 2, an anti-hooking barrel partition plate 11, a U-shaped notch 15 and a spring fishhook body 6. The spring fishhook body 6 comprises a fixing ring 5, a buckle sleeve 7, a spring 8, a needle handle 9, a needle handle sleeve 10, a spring 12, a buckle sleeve 13, an N-shaped needle handle folding piece 14, a fishhook body 16 and a fishhook body 17. The fixing ring 5 is connected to the center of the anti-hooking barrel partition plate 11, when the fish bits the fishhook, the needle handle 9 is disengaged from the overlapping structure of the buckle sleeve 7 and the buckle sleeve 13, the spring 8 and the spring 12 are tensioned accordingly, the fishhook body 16 and the fishhook body 17 puncture into the mouth of the fish in different directions, and therefore the fish can not get unhooked to escape easily. In the line take-up process, obstacles can be removed because the surface of the hemispheric cover is smooth and a rotating ring rotates. The fishhook bodies are located in the anti-hooking barrel and isolated from the outside, and therefore the purposes of preventing hooking and preventing the fish from getting unhooked are achieved.

The invention discloses a meteorological visualization data queue processing system, relates to the crossing field of modern Internet information technology and meteorological visualization display, and solves the problem that the existing method meets the real-time requirements of modern meteorological services on images and videos. The system operates at a rear end to provide a data queue for a meteorological front-end visualization module, and carries out time sequence caching on meteorological data, can various types of data can be placed into a plurality of queues to be cached, so the coherence requirement of real-time frames of visual data is well met. The system comprises a message exchange module used for gathering different types of messages; a scheduling reason module which is used for matching the sending and receiving of the message queue; and a pipeline which is used for carrying out streaming processing on the data. Therefore, data of the meteorological visualization front end and the meteorological rear end can provide a stable queue, adaptation of a meteorological visualization system to rear-end data cache is met, and stability of generating a visual meteorological service generated image is greatly improved.