202results about How to "Without breaking integrity" patented technology

Simulation test equipment for validating the reliability of satellite attitude control and a test method thereof belong to the field of satellite attitude control. The test equipment comprises a ground simulation support module, a fault injection module and a satellite-born module, wherein, the ground simulation support module includes a monitoring terminal, a satellite model, a signal exciting source and a moment reverse-solution unit; the fault injection module includes an analog-to-digital converter, a signal transfer circuit, a fault injection processor, a man-machine interface unit and a digital-to-analog converter; and the satellite-born module includes a sensor, a satellite-born controller and an actuator. The test method comprises the following steps of: fault model setting; satellite initialization; orbit and attitude information renewal; the satellite-born controller collects signals of the sensor and outputs actuator command signals to the fault injection module; the actuator receives actuator pseudo command signals and outputs feedback signals to the fault injection module; the moment reverse-solution unit collects the pseudo feedback signals output by the fault injection module and outputs moment control signals to the satellite model. The equipment and the method of the invention have high feasibility and high performance-price ratio.

The invention discloses an address mapping method for a flash translation layer of a solid state drive. The method comprises the following steps of (1) establishing a cached mapping table, a cached split table, a cached translation table and a global translation directory in an SRAM (static random access memory) in advance; (2) receiving an IO (input / output) request, turning to a step (3) if the IO request is a write request, otherwise turning to a step (4); (3) preferentially and sequentially searching the tables in the SRAM for the hit condition of the current IO request, finishing write operation according to hit mapping information, and caching the mapping information according to a hit type and a threshold value; (4) preferentially searching the tables in the SRAM for the hit condition of the current IO request, and finishing read operation according to the hit mapping information in the SRAM. The method has the advantages that the random write performance of the solid state drive can be improved, the service life of the solid state drive can be prolonged, the efficiency of the flash translation layer is high, the hit ratio of address mapping information in the SRAM is high, and less additional read-write operation between the SRAM and the solid state drive Flash is realized.

The invention discloses a train active suspension system fault diagnosis and fault-tolerant control device and a train active suspension system fault diagnosis and fault-tolerant control method based on a dynamic actuator, and belongs to the technical field of automatic control. The train active suspension system fault diagnosis and fault-tolerant control device based on the dynamic actuator comprises a dynamic actuator fault injection module, a platform control module, a fault diagnosis module, a real-time monitoring module and a data acquiring module; and the dynamic actuator adopts an electromagnetic actuator. By the online parameter estimation and adaptive robust fault-tolerant control method based on the dynamic actuator, limitation of the traditional fault diagnosis device under the condition that outside disturbance exists and faults of a plurality of actuators occur synchronously is avoided. The train active suspension system fault diagnosis and fault-tolerant control device and the train active suspension system fault diagnosis and fault-tolerant control method based on the dynamic actuator are easy to operate and high in implementability, and can be used for verifying feasibility on fault diagnosis and state monitoring of a train active suspension system actuating mechanism.

The invention discloses a non-intrusive pipeline real-time monitoring, prewarning and fault locating system, and belongs to the technical field of pipeline system temperature and pressure monitoring, and pipeline system fault diagnosis. The method adopted by the invention comprises the following three aspects: temperature and pressure real-time monitoring, prewarning, and fault locating; the pressure monitoring and the temperature monitoring adopt non-intrusive measuring methods, the pressure is monitored by adopting an ultrasonic non-invasive measuring method, the temperature is monitored by adopting a traditional temperature sensor non-invasive measuring method, and sensors for pressure monitoring and temperature monitoring are mounted on the outer wall of a pipeline; a design database is used for prewarning a fault signal; and a negative-pressure wave leak detection method is adopted for locating a fault in a pipeline system.

The invention provides a display panel and a display device. The display panel comprises a backlight plate, a display unit, a first backlight source and a second backlight source, wherein the displayunit is arranged on the backlight plate; the first backlight source and the second backlight source are arranged at two ends of the backlight plate; a first through hole is formed in the backlight plate; the first backlight source is arranged at a position close to the first through hole; the second backlight source is arranged at a position far away from the first through hole; and the display unit comprises a first substrate, a second substrate opposite to the first substrate and a liquid crystal layer between the first substrate and the second substrate. The display device comprises the display panel. A control method of the display panel comprises the steps of turning off a sensor to enter a full-screen display state and turning on the sensor to enter a working state of the sensor. Thedisplay panel and the display device are capable of realizing a 100% full-screen display effect without introducing a new mechanical structure.

The invention discloses an invisible anchor bolt of an external wall insulating decoration plate and an external wall insulating decoration integration packaged plate. The invisible anchor bolt comprises an inner tabletting with a column-shaped presser foot and a fastener, and the inner tabletting is embedded and inserted in a heat-insulating board, the pressure foot is an inner screw thread, one end of the fastener with an outer screw thread is connected with the pressure foot, and the outer wall of the other end is provided with a barb which is inserted in a mounting hole of the wall body, and the waist portion is provided with an outer tabletting which is vertical with the fastener, when the fastener is tightly screwed on the pressure foot, the outer tabletting is tightly clung on the surface of the packaged plate. The external wall insulating decoration integration packaged plate comprises a heated board whose inner surface is tightly clung on the wall body, and an alkali-fast break fiber web checked cloth layer and a decoration layer which are adhered on the outer surface of the plate one by one, the inner tabletting with the pressure foot are embedded into the heated board, and the surface of the pressure foot and the inner tabletting are all fell into the heated board, and the pressure foot is provided with an inner screw thread which is connected with the fastener. The invention has the advantages of simple structure, beauty and firmness, convenient transporting, and fast assemblage, which achieves a possibility of the industrialized production of external wall insulating decoration packaged plate.

The invention discloses a recorded waveform data processing method and a recorded waveform data processing device, wherein the recorded waveform data processing method comprises the steps of acquiring the number of periodical sampling points of recorded waveform data, wherein the recorded waveform data are electric energy quality monitoring data; and performing inter-cycle differential calculation on the sampling point data at the same position between the cycles for obtaining differential data, so that advantages of low subsequent processing data volume, high processing speed in compression or transmission, and the like are realized. The recorded waveform data processing method and the recorded waveform data processing device can reduce data volume of to-be-compressed data or to-be-transmitted data, thereby reducing compression calculation amount and data volume after compression, and improving compression rate. Furthermore the recorded waveform data processing method and the recorded waveform data processing device can relatively effectively reduce storage and / or transmission load of the mass recorded waveform data of an electric energy quality monitoring terminal.

The invention relates to an induction cooker, comprising a panel, electromagnetic heating coils and a control circuit. The induction cooker is characterized by that: at least one pattern of a positive temperature coefficient temperature sensor is printed on the surface of the panel to realize the contact with a heated pan, a first coil which is connected with the positive temperature coefficient temperature sensor is printed on the panel with conductive slurry, a second coil is magnetic coupled with the first coil, and a processing circuit is electrically connected with the second coil and the control circuit.

The invention discloses a method for achieving functions of fast forward, fast backward and accurate Seek in an HLS protocol in an expanding mode. The method comprises the following steps that I-frame record information is obtained, I-frame description information is organized, all I-frame record information stored when a medium is fragmented is organized according to a certain form, and all the I-frame record information contained in each fragment is organized and named as the I-frame description information of the fragment; the I-frame description information is recorded in the M3U8 expanding mode, the I-frame description information of each fragment is stored in an M3U8 file so that a client side can obtain the I-frame description information of each fragment, and therefore the client side obtains the M3U8 file and the I-frame description information of each fragment; the client side accurately controls playing according to M3U8 expansion information. The method can solve the problem of accurate control over accurate Seek, fast forward playing and fast backward playing in an OTT mobile video service system, achieves the purposes of smooth play and random play, and improves digital media life experience.

An automatic hot water stirring cup comprises a cup body and a liner, the upper portion of the liner is connected with the cup body, a containing cavity is formed among the liner, the side wall of thecup body and the bottom of the cup body, one surface of a power generating piece is connected on the outer surface of the bottom of the liner, the other surface of the power generating piece is connected on the upper surface of a metal cup bottom cover, a cup bottom is connected on the lower portion of the cup bottom cover, the cup bottom and the cup bottom cover form a heat-conducting medium containing chamber, a heat-conducting medium is stored into the heat-conducting medium containing chamber, a motor is arranged in the cup bottom cover, the power generating piece is connected with the motor through a PCB (printed circuit board), a shaft of the motor is connected with a magnet, a magnet is arranged at the position corresponding to the inner surface of the bottom of the liner, and themotor drives the magnets to rotate to generate magnetic force, so that water is stirred. The power generating piece of the cup generates power by the aid of the temperature difference of hot water todrive the motor to rotate, the magnet is connected on the shaft of the motor, the motor drives the magnets to rotate to generate the magnetic force, water in the cup is stirred, stirring and cooling are achieved, the integrity of the liner is not broken, and cleaning is facilitated.

The invention discloses a kit for extracting fecal microbial genome by magnetic bead method and an extraction method thereof, belongs to the field of biotechnology; the technical scheme adopted is; akit for extracting fecal microbial genome by magnetic bead method include lysis fluid, impurity removal reagent, genomic adsorbent and eluent, in buff a, B and C combine lysis microorganisms, the humic acid and other impurities are removed by the unique precipitating solution, then adsorbing genomic DNA with magnetic beads, further removing foreign proteins and salt ions with special buffer G andbuffer H, and finally eluting the purified genomic DNA; a method for extract genomic DNA of faeces microorganism includes such step as extracting genomic DNA of faeces microorganism with high efficiency and sufficient quantity, extracting genomic DNA of faeces microorganism with high quality, extracting genomic DNA of faeces microorganism with simple procedure, high speed, safety and no pollution,shortening extracting time, and can be used for manual operation and automatic platform, and is widely suitable for extracting animal faeces genomic DNA of faeces microorganism with high speed, efficiency and economy for customers, and has wide application prospect.

The invention provides a numerical control grinder load spectrum data transfer sampling rate device and a numerical control grinder load spectrum data transfer sampling rate method to meet requirements of establishing a numerical control grinder load spectrum. Four non-contact revolution speed transducers are arranged on end portions of a main shaft, a grinding wheel shaft, an X-shaft lead screw and a Z-shaft lead screw. Four current transmitters respectively penetrate through power lines of a main shaft servo driver, a grinding wheel shaft frequency converter, an X-shaft servo driver and a Z-shaft servo driver. The revolution speed transducers and the current transmitters send signals to a signal collecting and processing plate. The signal collecting and processing plate firstly conducts time sharing sampling on signals of various paths, then converts sampled analog signals into digital signals and sends the digital signals to a central processing unit (CPU) for processing, processed data are transmitted to a host computer through an RS 232 serial port. A computer stores load spectrum data and conducts post processing. The numerical control grinder load spectrum data transfer sampling rate device and the numerical control grinder load spectrum data transfer sampling rate method have the advantages that on the premise of not influencing normal operation of a numerical control grinder, the numerical control grinder load spectrum data can be collected and recorded conveniently and rapidly, and basis is provided for reliable design of the numerical control grinder.

The invention discloses an electrostatic discharge immunity test method. Based on the principle of potential energy-kinetic energy conversion, this method realizes the accurate control of the approach speed of the air discharge electrode in the ESD immunity test; this method uses a metal shielding room and a coaxial adapter for the ESD immunity contact discharge test, which can not only ensure the The discharge current efficiently flows into the horizontal coupling plate or vertical coupling plate, and the integrity of the metal shielding room is not damaged as much as possible, thereby reducing the impact of the radiation field generated by the high-voltage switching action of the electrostatic discharge simulator on the equipment under test. The method can improve the repeatability and accuracy of air discharge and contact discharge in electrostatic discharge immunity test.

The invention relates to an image processing system, which comprises an acquisition module, a creating module, a setting module and a load module, wherein the acquisition module is used for acquiring an image file stored in a storage; the creating module is used for creating one or a plurality of applications in an extended region of the image file and creating one or a plurality of layers in each application, wherein one or a plurality of the layers are used for storing the additional information of the image file, and the additional information comprises characters and icons; the setting module is used for setting the additional information for the created one or a plurality of layers; and the load module is used for storing the set additional information to the corresponding layer in accordance with the concerted data formats. The invention further provides an image processing method. By means of the image processing system and method, the addition of the additional information to the image file is realized without destructing the completeness of the original image file.

The invention belongs to the technical field of underground coal gasification, and discloses a production system and a method for a distributed injection and exhaust passage narrow strip coal underground gasification furnace; and the method comprises the steps of: sequentially performing coal seam ignition in the gasification furnace, injecting a gasifying agent and forming a gasification passage,moving back a flame working face and retracting a gas injection point, exhausting and transporting gas; temperature monitoring and stop operation of the gasification furnace, and gasification furnacefilling, meanwhile, the invention discloses a production system for distributed injection and exhaust passage narrow strip coal underground gasification furnace. The invention does not need to manually dig a coal seam roadway in the gasification furnace as a gasifying agent injection lane, a gasifying passage and a gas transportation lane, and does not need to construct a large isolation and sealing of the gasification furnace and the external roadway after the personnel exit; the purpose of not tunneling or destroying the integrity and tightness of the coal seam is realized, and the purposeof less disclosure and interference of the coal seam is achieved; the complete structure of the surrounding rock is kept, so the gasification furnace has good sealing and pressure bearing capacity during the operation process.

The invention provides a steel-concrete mixing type anti-shearing connecting piece which is applicable to connecting a wave-shaped steel web plate and a concrete top plate. The top of the wave-shaped steel web plate is provided with a hole; the upper part of the hole is respectively welded with one or more combined steel bars along the vertical direction of the two sides of the wave-shaped steel web plate; at the position of a combined face of the wave-shaped steel web plate and the concrete top plate, one horizontal frange plate which is in convex-concave complementation and tight adhesion with the wave-shaped steel web plate is respectively arranged at each one of the two sides of the wave-shaped steel web plate in the vertical direction; the frange plate is provided with a plurality of vertical welding nails; a connection structure above the frange plate stretches into the reinforced concrete top plate connected with the frange plate; and a transverse steel bar in the concrete top plate penetrates through the hole on the wave-shaped steel web plate, and the concrete of the wave-shaped steel web plate is poured. The steel-concrete mixing type anti-shearing connecting piece has the characteristics of an imbedded anti-shearing connecting piece and a frange type anti-shearing connecting piece; steel products are saved, the machining is convenient, the construction is convenient and the anti-shearing strength is high; the strength, the rigidity and the durability of a connecting part are better; and the integrity of the combined part is good, and the social and economic benefits are good.

The invention discloses an automobile backsight device and a display thereof, which is used for realizing high-brightness displaying effect. As to the physical hierarchical structure, the display sequentially comprises a first polarizing plate, a glass liquid crystal unit, a second polarizing plate, a brightness enhancement film, at least a diffusion film, a backlight plate and a heat dissipation plate which are constrained on a framework. The hierarchy distribution of the display leads the brightness to be ranging from 3000cd / m<2> to 8000cd / m<2>; therefore, when being combined with an anti-glare mirror with luminousness being 12-20%, the display can ensure the vision of a driver so that the driver can not only see information displayed on the display, but also see objects behind the automobile reflected by the anti-glare mirror.

The invention provides a corncob moisture content measurement device and method. A measurement circuit comprises a high-frequency signal oscillating source, a transmission line, a measurement electrode, a first detection circuit, a second detection circuit and a calculation circuit; the high-frequency signal oscillating source, the transmission line and the measurement electrode are connected in sequence; one end of the first detection circuit and one end of the second detection circuit are connected to two ends of the transmission line respectively; the other ends of the first detection circuit and the first detection circuit are connected with input of the calculation circuit respectively; the measurement electrode is in contact with surfaces of corncobs and is used for outputting corresponding output resistance according to the moisture content of the corncobs, and generating a reflection signal when a high-frequency sine wave signal which is generated and transmitted by the high-frequency signal oscillating source is received and the resistance of the transmission line is not matched with the output resistance of the measurement electrode; forward and backward signals generate moving standing waves on the transmission line; alternating-current signals at two ends of the transmission line, which are detected by the two detection circuits, are converted into direct-current signals, and voltage values corresponding to the signals are transmitted to the calculation circuit; the calculation circuit is used for calculating pressure difference value output according to the voltage values. The corncob moisture content measurement device and method can realize rapid, lossless and accurate measurement.

According to the backlight module, the liquid crystal display screen and the using method of the liquid crystal display screen, the liquid crystal display screen comprises a liquid crystal display panel, a backlight module capable of being switched between a transparent state and a backlight state, and an optical element; by means of the backlight module capable of being switched between the transparent state and the backlight state, the technical problem that an existing liquid crystal display screen is difficult to transmit light can be solved without damaging the integrity of a full screenand increasing the damage possibility and the maintenance cost of a mobile phone, and normal display and use of the optical element can be achieved on the same liquid crystal display screen; and possibility is provided for realizing a real liquid crystal display full screen without a mechanical structure.

The invention discloses a firefighting integrated control system applied in an electric automobile charging and electrical changing station. The firefighting integrated control system comprises a gas fire extinguishing system, a water fire extinguishing system, a fire hazard detecting and alarming system and a ventilation and smoke evacuation system, and the working conditions of all firefighting subsystems can be monitored through the control panel of the integrated system. The quantity of the firefighting systems can be arbitrarily increased or decreased according to practical conditions of the electric automobile charging and electrical changing station, and the installation is simple; and after the electric automobile charging and electrical changing station is enlarged or rebuilt, the firefighting subsystems can be increased on the basis of the original firefighting integrated control system, so continuous firefighting safety guarantee is provided, and the economy is maximally considered on the basis of safety ensuring.

The invention relates to the field of flight control and discloses a remote control method of an unmanned aerial vehicle. In an embodiment provided by the invention, a remote controller for remotely controlling the unmanned aerial vehicle is equipped with at least one type of application of the unmanned aerial vehicle; different applications correspond to different unmanned aerial vehicle types; the remote control method of the unmanned aerial vehicle comprises: when a user starts one application of the unmanned aerial vehicle, loading a configuration file according to the started application, wherein the configuration file comprises position information of a virtual operation key for controlling the unmanned aerial vehicle in a human-machine interaction interface; according to the configuration file, providing the human-machine interaction interface; acquiring operation information of the user on a real operation key; converting the operation information on the real operation key into a touch signal on the virtual operation key in the human-machine interaction interface; converting the converted touch signal into a control command and transmitting the control command to the unmanned aerial vehicle; controlling the unmanned aerial vehicle to execute the control command. According to the embodiment provided by the invention, the remote controlling on the plurality of types of unmanned aerial vehicles can be realized without the need of modifying the unmanned aerial vehicle.

The invention provides a method for detecting mineral nutrient cycling from a cotton seedling stage to a cotton flowering and boll-forming stage by applying pressure. The method is characterized in that (1) transpiration of the cotton plants can be carried out normally; (2) transportation of photosynthetic products and mineral nutrients of cotton phloem are not broken, so that the nutrient cycling process in the cotton body can be carried out still; (3) under a condition that no relatively good method for studying the phloem transportation, the method can directly measure nutrient content in the cotton xylem sap for mathematical calculation, so that the cycling process of the nutrients in the plant body at a certain time can be known quantitatively; (4) plants for collecting the xylem sap can be used repeatedly, so that a change condition of the xylem sap in different growth stages of the same plant can be tracked and known, and influence on composition of the xylem sap by studying nutrient supply change. Besides, the method can be used for quantitatively studying distribution and cycling process in plant bodies of elements such as N, Na, Mg, P and the like in different plants.

The invention provides application of target up-regulation PAR-4 gene small ribonucleic acid (RNA) in preparing bladder cancer resisting drugs. The nucleotide sequence of the target up-regulation PAR-4 gene small RNA is composed of six positive sense strands and negative sense strands of 21 nucleotides. The 3' end of each strand is provided with two nucleotides in suspension mode (generally dTdT, and the 19 nucleotides in the middle are paired.). The target up-regulation PAR-4 gene small RNA comprises sa RNA of different sequences. By means of expression of target up-regulation PAR-4 genes in the bladder cancer cells, the small RNA can restrain tumor cell activity, induces cell apoptosis, and further can be applied to preparation of bladder cancer resisting drugs. The application of target up-regulation PAR-4 gene small RNA in preparing the bladder cancer resisting drugs is simple in operation of preparing the small RNA, low in cost, small in using amount, capable of achieving good activation effect when the transfection concentration is 50nM and accurate in activation action. The mRNA and protein level of the target genes are both improved. In addition, the sa RNA can induce genes to express without damaging completeness of gene groups, thereby being safe to use.

The invention discloses a switch knob and a vehicle-mounted touch screen and belongs to the technical field of multimedia control in the touch screen. The switch knob comprises a fixing component anda rotating component, wherein the fixing component is detachably connected to the touch screen; the rotating component is rotationally arranged outside the fixing component in a sleeving manner; a switch component and a gear component are arranged on the rotating component and positioned between the fixing component and the rotating component; the gear component communicates with the touch screento form a coupling capacitor; the gear component is configured to rotationally select any functional module on the touch screen; and the switch component can communicate with the touch screen corresponding to the selected functional module to form a coupling capacitor. The vehicle-mounted touch screen comprises a touch screen body and the switch knob; and the switch knob is detachably connected tothe touch screen body. The switch knob can be directly mounted on the touch screen body to be used in the case of not destroying the integrity of the touch screen; and moreover, local blind operationcan be realized so that the driving safety can be enhanced.

The invention relates to the technical field of water cups, in particular to a magnetic stirring cup with an automatic cleaning function. The magnetic stirring cup with the automatic cleaning functionincludes a cup body, a liner and a power generating sheet; one surface of the power generating sheet is connected to the outer surface of the bottom of the liner, and the other surface of the power generating sheet is connected to the upper surface of a metal cup bottom lid; a cup bottom and the cup bottom lid form a heat-conducting medium containing chamber, and a motor is arranged in the cup bottom lid and separated from a heat-conducting medium in the cup bottom lid; there are gaps on the top of a rotor of a motor and the upper portion of the cup bottom lid, the rotor is provided with a cylindrical magnet containing space for placing magnets, magnetic blocks are also arranged at the position corresponding to the inner surface of the bottom of the liner, the motor drives the magnets torotate, and the magnetic blocks also rotate at the same time to generate magnetic force for stirring water. Without breaking the integrity of the liner, more convenience is provided for cleaning; theair resistance is reduced, and the efficiency is improved; the motor is directly connected with the power generating sheet to achieve maximization of energy utilization; when cold water is used for flushing, a magnetic stick in the cup is driven to reversely move to achieve flushing.

The invention relates to a method and system for achieving fast circulation of a structural file among multiple levels of safety domains. According to the method and system, an access control module is set for the structural file, so that under coordination of a cross-domain coordinated management center, access of the structural file among the multiple levels of safety domains is operated not specific to the whole structural file, but specific to the access control module of the file, and a circulation process is not specific to the whole structural file, but a copy of a file portion on which a user has the access authority is generated by a file copy generator. Confidentiality of the whole file is ensured, completeness of the files is not damaged in the verification process, and the whole process is fast in synergy and clear. In addition, the problems of logical structure description, style structure description and resource data completeness and confidentiality in the network cross-domain circulation process of the structural file can be effectively solved, and the structural file can be reasonably, legally and safely used.

A method for culturing a tied bottle gourd, that is, its neck is tied includes such steps as culturing the ordinary bottle gourd plant until it is in flower, stopping irrigation and fertilizer application when its flowers have faded for 4-10 days, tying the neck of bottle gourd when its length is more than 20 cm, and trimming.

The invention relates to a microfluid-controlled frequency adjustable microstrip patch antenna. The antenna comprises two oppositely-disposed substrates and microfluid channels into which a microfluid can be injected; one of the substrates is provided with a radiating unit in the form of a patch; clad copper arranged on the other substrate is adopted as reflection ground; a feed structure vertically passes through the two substrates and feeds electricity to the radiation unit; and the microfluid channels are arranged between the two substrates and are located in an electric field distribution area corresponding to the radiating unit; and the microfluid channels are perpendicular to the centering surface of the radiating unit where the feed structure is located. According to the microfluid-controlled frequency adjustable microstrip patch antenna of the invention, the microfluid is injected into the microfluid channels, so that an effective dielectric constant between the radiating unit and the reflection ground can be increased, and therefore, the operating frequency of the antenna can be adjusted so as to be lowered; and the adjustable frequency range of the antenna can be controlled through loading the locations of the microfluid channels; and the reversibility of such adjustment can be realized through exhausting the microfluid channels. According to the microfluid-controlled frequency adjustable microstrip patch antenna, the adjustability of the frequency of the antenna can be realized safely and effectively at low cost, and the size of the antenna is not increased, and the integrity of the patch of the antenna is not damaged.

The invention provides a process decomposition method and device for a hadoop cluster to run ETL, and the method comprises the steps: constructing a directed acyclic graph based on all assembly nodes of an ETL process, and searching reduce nodes in the directed acyclic graph; if the reduce node is searched, forming a key value pair of the reduce node and a data source of the reduce node according to whether the reduce node has a direct data source or not; constructing a mapper and a reducer corresponding to each reduce node according to the key value pair, and further constructing an MRWork; and if the reduce node cannot be searched or the data source node cannot be associated with the reduce node, constructing a mapper based on the data source node and a downstream node thereof, and further constructing the MRWork. According to the method, the ETL process is submitted to the mapreduce framework of the hadoop cluster environment for concurrent execution, the process integrity is not damaged, and programming implementation is more convenient and flexible.