121results about How to "Guaranteed to be independent" patented technology

The invention relates to a multi-path shadow compound fading channel simulation device and a work method thereof. First, a universal compound fading mathematical model is provided based on the comprehensive consideration of the compound influence of path losses, shadow fading and multi-path fading. Then, the multi-path fading, the shadow fading and channel noise in the model are decomposed into a Gaussian random process expression form and generated by an SoS (Second-Order Section) fixed-point model in a unified simulation way. The simulation method conforms to FPGA-based (Field Programmable Gate Array) fixed-point operation characteristics and is easy to realize. The simultaneous simulation of an uplink and a downlink is supported by a simulation system. Two input interfaces are available for selection, and radio frequency simulation signals or intermediate frequency simulation signals are input through the input interfaces. Parameters about communication scenes and the like are input by a user through a PC (Personal Computer), the feature parameters of the compound fading channel under the scenes are calculated by a DSP (Digital Signal Processor) in real time, and the feature parameters are utilized by the FPGA to carry out hardware simulation. Output simulation signals passing a wireless channel also comprise intermediate frequency signals and radio simulation signals. The multi-path shadow compound fading channel simulation device and the work method thereof are used in land-land mobile communication scenes, and can also be used in air-land (land-air) and air-air communication fading channel scenes.

The invention discloses an uplink data transmission method of a cascade remote RF unit (RRU), which ensures the interdependence of the uplink data of each RRU and saves caching. Through the cooperative work of BBU and RRU, the invention exchanges respective information thereof, and eventually calculates out the deviation of the IQ data thereof in a data frame for each cascade of RRU, and configures the deviation to the RRU as the configuration parameters. The method includes the following steps: the RRU calculates out the time delay from a downlink input interface to an uplink output interface, and the time delay refers as Toffset; when the uplink transmits data, the RRU determines the time of the Toffset plus the conclusion of the uplink data frame as the starting time of data transmission; when the starting time comes, the invention inserts an uplink data package to be transmitted into the uplink data frame.

The invention provides a multi-machine parallel system based on droop characteristic control. The multi-machine parallel system comprises a synchronizing signal generator, multiple inverter modules and a monitoring module, wherein the synchronizing signal generator is used for generating a synchronizing signal, the multiple inverter modules are connected in parallel and connected with the synchronizing signal generator, each inverter module captures the synchronizing signal, converts the synchronizing signal into a voltage phase signal and meanwhile samples the voltage and the current of the inverter module, and then phase coincidence is achieved according to the voltage phase signals. The monitoring module is used for calculating the output power of each inverter module according to the voltage and the current of the inverter module and calculating the average output power of the system, and an inverter controller conducts droop control according to the difference between the output power and the average power so as to modify the reference voltage target quantities of the inverter modules. According to the system, phase height synchronization can be achieved, it can be ensured that the modules are independent of one another and no circulation exists between the modules, power supply quality is greatly improved, and reliability is high. The invention further provides a control method of the multi-machine parallel system based on droop characteristic control.

The invention discloses a PECVD (plasma enhanced chemical vapour deposition) film-coating system. The PECVD film-coating system comprises a process system, a loading-unloading system and a valve mechanism, wherein the process system comprises a process cavity and a process reaction chamber; the process reaction chamber is arranged in the process cavity; the loading-unloading system comprises a loading-unloading cavity and a transmission manipulator; the transmission manipulator is slidably arranged between the loading-unloading cavity and the process cavity; the valve mechanism is arranged between the process cavity and the loading-unloading cavity and used for communication or isolation between the process cavity and the loading-unloading cavity, and via the valve mechanism, the transmission manipulator can perform a reciprocating motion in the cavities, and mutual communication between the cavities and the mutual independence of vacuum environments are ensured simultaneously; the loading-unloading cavity also has the functions of a loading cavity and a transit transmission cavity, and can meet the functions of loading and unloading for a substrate, and mutual transmission between the cavities; and due to only two cavities, the structure is simpler, so that equipment cost is low, installation and maintenance are simple and convenient, transmission structure is simple and convenient, and requirements on mechanical accuracy are low.

A gas insulated metal enclosed switchgear is equipped with a bus-bar chamber, a circuit breaker chamber and a cable chamber, the bus-bar chamber is equipped with a pressure releasing window (A), and the circuit breaker chamber is equipped with a pressure releasing window (B). The pressure releasing windows (A and B) are both communicated with an upward pressure releasing channel, the pressure releasing channel is communicated with the atmosphere via a top cover pressure releasing hole, and a bus-bar chamber pressure releasing port is branched out of the top cover pressure releasing hole. A horn-like pressure releasing channel is arranged outside the bus-bar chamber pressure releasing window, and a first bending force reduction unidirectional opening enclosing device is arranged outside the circuit breaker chamber pressure releasing window. The cable chamber is equipped with a pressure releasing port, and the pressure releasing port passes a second bending force reduction unidirectional opening enclosing device and then is communicated with the pressure releasing channel. The structure of the enclosing devices is that a box or plate covers the pressure releasing window or the pressure releasing port, one edge of the box or plate is fixed, and a plurality of bending force reduction square hole grids which are parallel with the fixed edge are arranged on the plate surface inside the fixed edge. According to the gas insulated metal enclosed switchgear of the present invention, when an internal arc occurs, the mutually independent compartments of the switchgear and the adjacent switchgears operate independently and do not influence mutually, and the equipment are safe and reliable.

The invention relates to aerodynamic layout of an internal and external flow waverider aircraft and belongs to the technical field of aerodynamic design of aircrafts. The aircraft is divided into an upper part and a lower part in terms of aerodynamic layout design; the lower part of the aircraft is mainly used for providing high lift-drag ratio for unpowered gliding flight with high Mach number, and a flat waverider layout form is adopted; the upper part of the aircraft is mainly used for arranging an air suction type ramjet. According to the layout form, an engine flow channel and a waveriderplane are mutually independent and non-interfering, so that coupling effect of pneumatics and power is greatly reduced, particularly, resistance produced by an engine during unpowered flight with high Mach number can be obviously reduced, increase of the lift-drag ratio during unpowered flight with high Mach number is facilitated, and furthermore, thermal protection of the engine is facilitated.

The invention provides a multi-signature shared account protection method and system and electronic equipment, and the method comprises the steps: generating a multi-signature contract account of which the signature mechanism is n / m and which is provided with a transfer quota parameter and a transfer interval time limiting parameter, and enabling the multi-signature contract account to correspondto a multi-signature contract stored in an Ethereum block chain; obtaining transaction signatures of the n private accounts when any n private accounts in the m private accounts perform multi-signature transaction, and obtaining m-unparticipated in the multi-signature transaction when the account transfer amount is greater than the account transfer limit parameter or the account transfer time interval is less than the account transfer interval time limit parameter; informed signatures of the n private accounts; Verifying the transaction signature or verifying the transaction signature and theinformed signature through the multi-signature contract, and executing the multi-signature transaction after the verification is passed. According to the invention, fraud transactions caused by intercommunication between part of private accounts of the multi-signature contract account can be avoided, so that the asset security of the shared account is ensured.

The application provides a distributed space data processing system based on messages. The system comprises a task management module, a task execution module and a message middleware module, wherein the task management module is used to define a task of processing space data and send task messages to the message middleware module; the task execution module is used to acquire the task messages from the message middleware module, conduct corresponding processing on the space data according to the task messages and feed back task state messages to the message middleware module; and the message middleware module is used to transmit the task messages sent by the task management module to the corresponding task execution module according to preset message transmission rules and is also used to conduct corresponding processing on the task messages according to the task state messages fed back by the task execution module.

The invention discloses a small-sized integrated axle weight and brake and vehicle speed combined test bench. The axle weight and brake and vehicle speed combined test bench is composed of a test platform foundation frame, a left test bench framework, a right test bench framework and two testing systems, wherein the left test bench framework and the right test bench framework are connected with the test platform foundation frame through pressure sensors respectively mounted at four corners of the left test bench framework and four corners of the right test bench framework, the testing systems are mounted on the test bench frameworks, and each testing system is composed by a rotary drum, a lifting mechanism, a force measuring device, a rotation speed measuring device and a third rotary drum in a combination mode. According to the axle weight and brake and vehicle speed combined test bench, a brake test bench, a speedometer test bench and two sets of rotary drums of an axle load meter are combined to one group, a driving motor and a speed reducer are arranged in the rotary drums, due to the integrated design, the structure is simplified, the occupied space is reduced, cost is lowered, the space requirement for installation of other devices can be met, and a test vehicle is enabled to finish all testing tasks according to national standard requirements.

This invention relates to a network framework system of public cloud based on OpenStack. The system comprises a controller cluster server, a computing storage cluster server, a management intranet line, a virtual machine intranet line, a virtual machine extranet line, a distributed storage network line, a storage replication network line and a remote management network line; the controller cluster server is connected with the management intranet line, the virtual machine intranet line, the virtual machine extranet line and the storage replication network line through a first Ethernet switch, and is connected with a public network through the remote management network line; and, the computing storage cluster server is connected with the management intranet line, the virtual machine intranet line, the distributed storage network line and the storage replication network line through a second Ethernet switch. Compared with the prior art, the network framework system realizes the large-scale public cloud storage, saves plenty of cost, and makes the maintenance technology simple and efficient.

The invention relates to a sleeve type double-liner multi-purpose electric water heater, which is at least composed of a main electric water heater body, an electric heating device and sleeve type double liners, wherein the main electric water heater body at least comprises an operation control device and a thermal insulating layer. The bottom of the inner-layer liner of the sleeve type double liners is closed, the top of the inner-layer liner of the sleeve type double liners is open, and the inner-layer liner has various shape structures. The outer-layer liner is arranged at the periphery of the inner-layer liner and is in an annular closed shape. The top of the sleeve type double liners is provided with an installing base for the electric heating device, and the heating end of the electric heating device is inserted into the liners and is completely sealed with the liners through a threaded connection device and a sealing ring. The sleeve type double-liner multi-purpose electric water heater adopts a single way or double ways for water feeding and is provided with the double liners and double hot-water supply systems, so that the sleeve type double-liner multi-purpose electric water heater can respectively supply hot water for washing, bathing and heating when in use, can also respectively supply hot water for washing and bathing for two independent hot-water conveying pipelines at the same time, and can further supply hot water for washing and bathing for one hot-water conveying pipeline. The sleeve type double-liner multi-purpose electric water heater has the characteristics of compact structure, small size, high structural strength of the liners, remarkable energy saving effect and the like, and can meet different installation and use requirements.

The invention belongs to the technical field of robots, and particularly relates to a power arm for a power transmission line inspection robot and the power transmission line inspection robot. The problems of complex obstacle crossing action and low obstacle crossing efficiency of an inspection robot in the prior art is solved. The power transmission line inspection robot comprises at least two power arms, wherein the power arms comprise line holding modules and line patrol modules; the line patrol modules comprise elastic pressing mechanisms, crawling wheels and impeller mechanisms which aresequentially connected, the crawling wheels and the impeller mechanisms are independent from each other, the crawling wheels are used for travelling on a power transmission line, and when an obstacleis encountered, the impeller mechanisms and the elastic pressing mechanisms form a passive compliant obstacle crossing device, so that the function that the crawling wheels are supported to be locatedabove the power transmission line and the crawling wheels do not depart from the surface of the obstacle are achieved, and the obstacle crossing action is completed through the cooperation between the impeller mechanisms and the elastic pressing mechanisms. The inspection robot with the power arms can perform obstacle crossing efficiently during inspection, the operation is safe and stable, and the energy consumption is reduced.

The invention discloses an OLED display substrate and a manufacturing method, and a display apparatus, relates to the technical field of the OLED, and aims to lower mutual crosstalk degree between twoadjacent pixel light rays in image display so as to weaken the color cast problem of the displayed image. The OLED display substrate comprises a substrate and a plurality of light emitting devices formed on the substrate; a pixel definition layer is formed between two adjacent light emitting devices; an accommodating part used for accommodating the overlaid region of the two adjacent light-emitting devices is formed on the surface, deviated from the substrate, of each pixel definition layer; and the bearing surface of the accommodating part and the surface, deviated from the substrate, of thecorresponding pixel definition layer are located in different planes. The manufacturing method of the OLED display substrate is used for manufacturing the OLED display substrate. The OLED display substrate and the manufacturing method thereof, and the display apparatus are used in the display technology.

The invention provides a writing interaction method, an intelligent interaction display device and a writing interaction system, and the writing interaction method comprises the steps: detecting a touch event of an intelligent pen, and obtaining a corresponding identification of the intelligent pen; generating handwriting according to the touch event, and judging whether the generated handwritingcorresponds to the multiple intelligent pens or not according to the identifiers of the intelligent pens; if yes, generating a plurality of writing areas which are not overlapped with one another, wherein the writing areas correspond to the intelligent pens in a one-to-one mode, each writing area covers the handwriting corresponding to the intelligent pen, and each writing area only responds to the touch event corresponding to the intelligent pen to generate handwriting. According to the writing interaction method provided by the invention, different and mutually independent writing areas aregenerated by matching the initial handwriting of each intelligent pen, so that the content generated by different intelligent pens is clearly presented, and the user experience of multi-person writingis improved.

The invention relates to a shield station passing method of first passing a large shield through a station and then building an air flue structure. The excavation of pilot tunnels arranged on two sides of an air flue is completed before a shield with a large diameter arrives the air flue, the cast-in-situ bored pile is conducted in the pilot tunnels, however, fender posts arranged in two sides of the pilot tunnels of a passing-through portion of the shield with the large diameter are not constructed temporarily, and the two sides of the pilot tunnels of a portion where the shield with the large diameter passes through the air flue are each additionally provided with one fender post, and the size of pilebolck crown beams of the portion where the shield with the large diameter passes through the air flue is increased. And then the shield with the large diameter passes through the air flue directly, and after the shield passes through the air flue, the earth excavation of the air flue and the secondary lining structure pouring are conducted. The shield station passing method of first passing the large shield through the station and then building the air flue structure can well solve the construction planning and preparing conflict between a running tunnel of a subway and the station, the shield can passes through the station air flue directly, the complete mutual independence between the running tunnel of the subway and the station can be guaranteed, the principal line of integral project planning and preparing is based on the running tunnel, and the aim of passing through the hole can be achieved as early as possible.

The invention discloses a root key generation and isolation method for multiple systems and a root key module. The method comprises the following steps: firstly, combining feature information corresponding to a system needing to generate a key with a chip root secret key to form secret key source data corresponding to the system, and then carrying out key generation operation on the key source data to obtain system root key data corresponding to the system. In this way, the obtained root keys corresponding to all the systems can be kept independent of one another due to the fact that the generated feature information is different. By applying the virtualization design of the invention, different system root keys can be generated for different systems, and security key isolation between different systems can be effectively realized. Because each system does not need to separately call the chip root key for encryption, the usage scenario of the chip root key is almost limited to the situation that the chip root key needs to be used when only the system root key is generated. Therefore, the probability of leakage of the root key information of the chip can be reduced.

The invention relates to the field of storage, particularly relates to the field of automatic storage with computers participating in decision making, in particular to a material loading and unloadingtask automatic generation method based on coordinates. Operation tasks can be automatically generated according to operation task types (loading or unloading) and the number of trolleys (one trolley,two trolleys, three trolleys and more than three trolleys). By means of the automatic task generation mode, loading and unloading tasks can be rapidly and safely completed, meanwhile, under the condition that a plurality of loading and unloading robots work together, the mutually independent and mutually matched working modes can be guaranteed, and the working tasks are efficiently completed without interference.

The invention discloses a data management system and a data management method for a vehicle networking closed test field. A data storage server is additionally adopted to collect and store the operation log data of all the network and function terminals in the test site independently, the tester's access to the test function is realized, and other network performance is not affected. A data feedback module is added to the test terminal, log files are uploaded over a private network, the tester accurately retrieve the data of the vehicle networking system, the economic cost and the time cost ofthe test are reduced, and the data can be collect in the existing vehicle networking test environment by using a data uploading module added for the test equipment and the related equipment, and thenew data can be used for comparing the old data with the new data. The data storage server is used to transmit data independently, which ensures that the data management system and the system under test are independent, simple and portable, and can meet the needs of different test sites.

The invention relates to the technical field of noodle cutting, and discloses a fine dried noodle cutting device. The device comprises a frame, a noodle rolling roller and a cutting table; the noodlerolling roller comprises a forward section, a and a reverse section which sequentially communicate with each other; the reverse section is sleeved by a reverse roller, and the conversion section is provided with a coaxial reverse mechanism, and the forward section is connected to the reverse roller through the coaxial reverse mechanism; the cross section of the cutting table is an isosceles triangle; one side of the cutting table is rotationally connected to a forward feeding roller; the forward feeding roller is positioned below the forward section; the other side of the cutting table is rotationally connected to a reverse feeding roller; the reverse feeding roller is positioned below the reverse section; two sides of the cutting table are separately connected to a forward cutting part and a reverse cutting part; the forward cutting part and the reverse feeding roller are positioned on the same side of the cutting table; and the reverse cutting part and the forward feeding roller arepositioned on the same side of the cutting table. The device provided by the invention can simultaneously cut and form two types of noodles.

The invention provides a method and system for registering a software system. The method comprises the step: the software system comprises a plurality of function modules and a registration module, wherein each function module corresponds to a code used for realizing the function module, and the code is only used for calling the corresponding function module, the registration module is executed by the following steps of: after installing the software system in a client end, sending registration request, wherein the registration request comprises identity recognition information of the client end and the function module used by the client end; receiving a registration result fed back to the registration request by an outside, wherein the registration result comprises control information used for allowing the function module to be used by the client end; and completing the registration of the function module used by the client end according to the control information in the registration request.

The invention discloses a monitoring structure for supporting data capture of a port and a virtual link as well as a monitoring method of the monitoring structure. The monitoring structure for supporting data capture of the port and the virtual link comprises an ARINC66 protocol monitoring engine, a monitoring configuration parameter module, a second input port and a second output port, wherein the ARINC66 protocol monitoring engine is independent with an ARINC664 protocol exchange engine and has an exchange structure inside; the second input port is in charge of acquiring data from a first input port and a first output port of the ARINC664 protocol exchange engine, judging whether the data is captured according to the monitoring configuration parameter module, and submitting the data required to be captured to the exchange structure of the ARINC66 protocol monitoring engine; and the data required to be captured can be exchanged by the exchange structure and is sent from the second output port. According to the invention, mutual independence of the monitoring engine and the exchange engine is guaranteed.

The invention relates to the technical field of automobile decoration, in particular to a compressed air power source proportioning pump which can dilute cleaning fluid for cleaning automobiles in proportion. The compressed air power source matching pump is simple in structure, convenient to use, safe to use, long in service life and low in noise in use. In addition, a reversing mechanism is small in vibration. When not used, the compressed air power source proportioning pump can stop working automatically. Due to the fact that compressed air is utilized as power, no electric equipment is used in the compressed air power source proportioning pump, and the problems of electric leakage, electric shock and the like in use are solved. Due to the fact that no motor is utilized as a power source, the phenomenon that due to high-frequency pump startup and shutdown, the motor overheats and is burnt is avoided. Furthermore, the problem that the automobile cleaning effect is poor due to unstable water pressure is solved.

The invention discloses a method for implementing a repeated data deletion technology based on a single-hash averaging Bloom filter. The method comprises the steps that firstly, hash functions with high requirements in a partition range are used, then k hash maps are generated through k hash functions, the adopted k hash functions are modulo operation with extremely low calculation magnitude, andthen scaling mapping is carried out to partitions with the same size; a single-hash averaging Bloom filter is generated from the stored data through calculation and storing the single hash uniform distribution filter; new data is proved not to exist if the mapping blocks are not repeated by generating a new single-hash averaging Bloom filter. According to the method for implementing the repeated data deletion technology based on the single-hash averaging Bloom filter, the data which may be repeated can be quickly and effectively filtered.

The invention relates to a data processing method and device, electronic equipment and a computer readable medium, and belongs to the technical field of computers. The method comprises the following steps: in response to activity triggering information sent by a client, selecting a target activity object from an activity configuration table, and initializing activity data corresponding to the target activity object; obtaining an activity configuration identifier of the target activity object from the activity configuration table, calling an activity file corresponding to the activity configuration identifier, and storing the activity data according to the activity configuration identifier; and obtaining an activity implementation template, loading the activity data into the activity implementation template according to the activity file to obtain activity content corresponding to the target activity object, and returning the activity content to the client. According to the method, theactivity is loaded according to the configuration table, the universal activity implementation template is provided, and each activity module is implemented by the independent activity file accordingto the activity configuration identifier, so that the activity development efficiency can be improved, and the maintenance difficulty of an activity system is reduced.

The invention discloses a laboratory research device for a coal and electricity integrated three-waste-based foaming material. Two input ends of a water liquid mutual drive unit are correspondingly connected with an output end of a constant current constant pressure pump and an output end of a liquid filling pump, and an output end of the water liquid mutual drive unit is connected with a liquid channel of a novel foaming device through a coil pipe; the coil pipe and the novel foaming device are arranged in a circulating water bath, and a high-speed camera is used for collecting foam images ofthe novel foaming device; a high-pressure storage tank is correspondingly connected with a gas chromatograph and a gas mixing tank; a vacuum pump is connected with the gas mixing tank; a calibrationgas cylinder is connected with the gas mixing tank; the gas mixing tank is connected with a pneumatic connector of the novel foaming device through an electromagnetic pressure reducing valve, a checkvalve and a vortex-type gas flowmeter sequentially; two output branches of a mixed slurry agitator is correspondingly connected with a feeding port of a screw rod pump and a weighing device A; and adischarging port of the screw rod pump and a discharging port of the novel foaming device are connected with two feeding ports of a three-waste-based foaming material mixer. According to the laboratory research device, a basis can be provided for the qualitative and quantitative research of the three-waste-based foaming material.

The embodiment of the invention provides an API gateway management method and device based on a plug-in. The method comprises the following steps: acquiring a development function demand of a target API gateway; importing a function plug-in package corresponding to the function demand; generating a function plug-in list based on the function plug-in package and the corresponding function; constructing a target API gateway based on the function plug-in list and each function plug-in package; obtaining a service demand corresponding to the current service; and performing function plugging management on the target API gateway based on the service demand. Therefore, the functions of the API gateway are realized in the form of plug-ins to ensure that the functions are mutually independent and do not influence each other, function plugging management is carried out on the API gateway according to service requirements, an installation package does not need to be recoded, an application program does not need to be restarted, when the functions of the API gateway are upgraded, the influence range can be effectively controlled, the flexibility of the API gateway is improved, and the method can adapt to different application scenes.

The invention discloses a user role mining system for network multi-domain information, which is divided into four modules: a basic information acquisition module, a basic relationship network construction module, a multi-view community information fusion module, a community discovery and user role definition module. The basic information obtaining module is used for obtaining necessary basic information from the target network; The basic relationship network construction module is used to construct the corresponding relationship network through the obtained basic information; The multi-view community discovery module is used for constructing the basic relationship network. The community discovery and user role definition module is used to discover the privilege community relationship, determine the corresponding user role and the corresponding role / privilege correspondence according to the multi-view service privilege relationship network. As that user roles are mined out through thenetwork space multi-domain basic information, the community relationship among the user rights can be accurately found, and more network security risk introduced in the role definition process can beavoided.

The invention discloses a cutting blade. Upper main cutting edges and lower main cutting edges have the same positive acute-angled cutting clearance angles; at least parts of the upper main cutting edges on the same side are projected relative to the lower main cutting edges on the same side; and at least parts of the lower main cutting edges on the same side are projected relative to the upper main cutting edges on the same side. A cutting tool comprises a cutter body, a fastening piece and the cutting blade; at least one cutter groove is formed in the cutter body; at least two groups of chip holding grooves are formed in each cutter groove; a blade body is fixed in the cutter grooves through the fastening piece; the cutter grooves include cutter groove side surfaces and cutter groove bottom surfaces; the upper surface or the lower surface of the blade body is tightly bonded with the cutter groove bottom surfaces; and the upper side surface or the lower side surface of the blade body is tightly bonded with the cutter groove side surfaces. The cutting blade has the advantages of low cutting vibration, light and fast cutting, good cost performance, good positioning rigidity, good chip removing performance, long service life and capability of being widely applied to rough machining and finish machining.

The invention discloses a petri network-based multi-source heterogeneous data quality detection method, which can use a scheduling plan module to configure data quality jobs and then use a message feedback mechanism of a petri network to form a table and chart form quality analysis report for each time of quality jobs and finally accumulate data quality detection problems. A data quality problem knowledge base is formed, sustainable development opinions and suggestions are provided for subsequent data quality detection, it is guaranteed that all data sources are independent of one another, SQLforms are unified, and the problem that multi-source heterogeneous data needs a specific query method for different data sources is solved. A graphical and draggable quality task and job management method is provided for a user, a quality detection scheduling plan can be configured, a data quality analysis result is generated for the user to check, and a data quality knowledge base is establishedto improve the capability of solving quality problems. Effective support is provided for system data quality improvement, so that the data value is improved.