38results about How to "Ensure speed" patented technology

The invention provides a solar small-water-area remote-control waste cleaning boat, which comprises a boat body and a control system. A fishing device, a trash bin, a propelling and steering mechanism, a power supply system and a video acquisition system are arranged on the boat body. The control system comprises a boat body control part and a remote control part. The boat body control part is installed on the boat body. The remote control part is arranged in a boat body control workstation. The boat body control part and the remote control part realize signal transmission through a wireless transmission way to realize the remote control of the boat body and the devices which are arranged on the boat body. The solar small-water-area remote-control waste cleaning boat is remotely controlled based on a wireless remote control technology, has the advantages that the boat is simple to operate, the mobility is good, the controllability is good, secondary pollution is not caused and the working efficiency is higher, and is very suitable for cleaning water surface trash in small water areas in parks or scenic spots.

A wind-electric set control system includes the center controller PLC, the intermediate relay panel, the soft merge network control panel, the display operation panel and the connector. The center controller PLC mainly includes CPU module 315-2DP, digital input module DI, digital output module D0, high-speed counter module FM350-2, analog input module AI, communication module CP340; the intermediate relay panel comprises a number of DC coil relays. The intermediate relay panel and the soft merge network control plane respectively connect with the input and output modules of the center controller PLC, and connect with the controlled object through connector. The system uses the intermediate relay panel to isolate the input/output signal, which improves the resist interference ability of the system. The soft merge network control uses current-limit soft-cut-in control strategy, to make the merge network processing more stable. This invention limits the merge network number of the small motor in one hour, which cleverly solves the small stop problem of the wind-electric set, and it uses PROFIBUS field bus technology to communicate with the central monitor computer.

The invention relates to a graphic-object-oriented single-line diagram vector drawing tool of a distribution network. The system comprises an application scene module used for selecting a corresponding scene according to the demand of application, and an icon manufacturing module used for finishing the icon manufacturing. By adopting the graphic-object-oriented design idea, the establishment of the object model of a power system is realized by using a GDI+ technology, a multi-layer icon combination technology is provided and the different application scenes in the analytic process of the power system are intelligently distinguished. All the electric devices are realized through the corresponding graphics class, besides having the characteristics (such as member variable, interface, and the like) of the general class, the graphics class also comprises visible graphics which can be directly edited and operated through program codes and have good packaging and inheritance properties.

The invention discloses a control method for a step counting shoe and a step counting control method. The step counting shoe comprises a shoe sole and a shoe upper, wherein a containing cavity is formed inside the heel part of the shoe sole, a step counting controller is arranged in the containing cavity and comprises a controller module, the input end of the controller module is connected with a sensor module and a switch module, the output end of the controller module is connected with a human-computer interaction module, a communication module, an interface module and a heating module, and the controller module is also connected with a storage module and a solar charging module. By integrating a step counting module in the shoe, a step counting function, a weight detection function, an environment monitoring function and a solar power supply and heating function can be achieved, so that a single function of a traditional shoe is greatly expanded, and accuracy and rapidity of step counting data are ensured through the novel step counting control method.

The invention discloses an intelligent on-line test device of power characteristics of carbon dioxide laser devices. The intelligent on-line test device comprises a power supply, a touch screen, a control box, a laser power device, a laser tube, a bracket, a bracket mounting plate, an optical test table, an output mirror, a medium total reflective mirror, an attenuator, a detector and a resonant cavity, wherein the power supply, a single-chip microcomputer system and an analog-to-digital conversion unit are mounted in the control box; the touch screen is arranged on the control box; the control box is externally provided with a communication interface; the control box is connected with a laser power device through a data line; the resonant cavity is formed in the front of the laser power device; the output mirror and the medium total reflective mirror are arranged inside the resonant cavity; the mirror surface of the output mirror faces inwards; the mirror back of the medium total reflective mirror faces towards the attenuator; the detector is arranged at the bottom of the attenuator; the rear end of the laser power device is connected with the laser tube; two ends of the laser tube are fixed on the bracket; the bracket is vertically mounted on the bracket mounting plate; the bracket mounting plate is arranged on an optical test table; the optical test table is provided with a plurality of channels; real-time detection of the laser powder is implemented.

The invention discloses an abdominal belt type fetal cardiogram monitor. The abdominal belt type fetal cardiogram monitor includes an abdominal belt main body which is formed by connecting an abdominal belt and a brace through fasteners, a flexible foldable fetal cardiogram acquisition device, and an intelligent handheld mobile terminal which is in wireless connection with the flexible foldable fetal cardiogram acquisition device; and the abdominal belt main body is made of medical silica gel, two ends of the abdominal belt are provided with row holes, and the fasteners are arranged at two end of the brace. The abdominal belt type fetal cardiogram monitor can automatically acquire, process and display fetal cardiogram data, can improve the accuracy and the timeliness of fetal cardiogram detection, can relieve the mental stress of a pregnant woman due to hand feeling, and has a high practical value.

A two-component propeller antifouling paint, consisting of component A and component B, said component A consists of resin, copper antifouling agent, auxiliary antifouling agent, organic antifouling agent, diluent and thixotropic The composition of component B is composed of curing agent, and the mass fraction of each component in component A is: resin 20-75%, copper antifouling agent 5-60%, auxiliary antifouling agent 10-20%, organic High-efficiency antifouling agent 0-20%, diluent 1-12%, thixotropic agent 0.5-2%, curing agent 15-25% of the mass content of component A, resin, copper antifouling agent, auxiliary antifouling agent , organic antifouling agent, diluent and thixotropic agent constitute the first component of this coating, and adjust its viscosity by diluting with diluent to realize construction and curing under water. The coating in the present invention can be applied underwater, and the film-forming thickness at one time can reach more than 150 μm, and it is resistant to salt water for 6 months: the coating has no blistering, no shedding, and the propeller has no corrosion.

The invention discloses a nonlinear control allocation method based on a depth autoencoder network. The method comprises steps: (1) a multilayer feedforward neural network is built and trained, and fitting of a nonlinear mapping function from rudder deflection to a torque is realized; (2) an autoencoder neural network is built; (3) the encoder in the autoencoder neural network is subjected to unsupervised training to obtain a nonlinear model from the torque to the rudder deflection; and (4) the nonlinear model obtained in the third step is embedded to an attitude control system loop, an expected control torque is used as input of the nonlinear model, the output of the nonlinear model is calculated in real time, the expected value of the rudder deflection is thus obtained, and nonlinear control allocation is thus realized.

The invention is suitable for multimedia application field and provides a value-added service integration method for a network television user. The method comprises the following steps of: setting up and deploying an OAUTH (Open the Authentication) server; applying for registering an OAUTH account by a third-party application, and integrating an API (Application Program Interface) provided by a television OAUTH service provider according to the application function; opening the third-party application corresponding to television programs by a user, issuing a calling request to the OAUTH server by the API integrated by the third-party application to carry out user and resource authorization to the third-party application; and obtaining the user information authorized by the user and carrying out interaction with the user by the third-party application. According to the method, the integration of the third-party application and the television value added service is realized, the API calling inside television equipment is opened, and on the premise that the television provides the base core function API, the third-party application can be self-integrated and the peripheral service can be expanded. The safety access to the television resources is effectively realized through the operation authorization realized by an OAUTH protocol, and the rapidity and the safety for API calling and the resource access are ensured.

The invention discloses a novel energy-storing type hydraulic wind generating set frequency regulation control system and method. The system includes four parts including a wind turbine part, a hydraulic transmission part, a hydraulic energy storage subsystem part and a power generation part. When load fluctuations cause grid frequency fluctuations, a wind turbine controls active power output by the system by controlling the pitch angle of a variable pitch system of the wind turbine part, the variable motor swing angle of the hydraulic transmission part and the variable pump/motor swing angleof the hydraulic energy storage subsystem part, and then the frequency output by a power generator is further controlled. The principle of coordinating the active power is that variable pump/motor swing angle control is prioritized, and then the variable motor swing angle is regulated and controlled to adjust power input into the power generator; and by regulating and controlling the variable motor swing angle, the pitch angle of the variable pitch system is also controlled, input of system energy is changed, and the frequency of the power generation system is stabilized.

The invention discloses a tightness performance detection test tool and detection method for a main driver of a shield machine. The tightness performance detection test tool comprises an annular soilbin external sealing flange and a tool sealing ring, wherein the annular soil bin external sealing flange is arranged at the shield machine, the tool sealing ring is arranged between the soil bin external sealing flange and a soil bin internal sealing wear-resistant ring, the bottom of the tool sealing ring is fixedly arranged on a main driver rotation body by a dual-head stud, the tool sealing ring is hermetically connected with the soil bin internal sealing wear-resistant ring, two sides of the main driver rotation body and the soil bin external sealing flange by O-shaped rings, a pluralityof internal sealing cavities are formed among the tool sealing, the soil bin internal sealing wear-resistant ring and the main driver rotation body, a plurality of external sealing cavities are formedamong the tool sealing ring, the soil bin external sealing flange and the main driver rotation body, and a pressure measurement device is arranged on each sealing cavity. The tightness of internal sealing and external sealing in the main driver can be detected before equipment leaving a factory, the failure risk of lip sealing during the construction process is greatly reduced, and the safety, the speed and the benefit of tunnel piercing are ensured.

The embodiment of the invention discloses an order generation method through a short-distance wireless communication tag and a system thereof. The method comprises the steps that an NFC payment client-terminal reads product source data and signature data in an NFC security payment tag, the product source data include product detailed information required for order generation, the signature data are data obtained in a way that the abstract of the product source data is signed by utilizing the private key of a digital certificate through a preset digital signature algorithm, and the abstract is generated by the product source data through a preset hash function; the signature data are decrypted by adopting the public key of the digital certificate and the abstract of the product source data is obtained, and the abstract is generated by the product source data in the NFC security payment tag through the preset hash function; consistency of the abstract obtained by decryption and the generated abstract is compared; and if the abstracts are consistent, the NFC security payment tag passes verification, and an order is generated by the product source data and user information and order payment is initiated to an NFC payment system. NFC payment security and transaction speed can be enhanced by the order generation method through the short-distance wireless communication tag.

The invention provides a method and a device for establishing a keyword bank of a vehicle navigation device. The method comprises the following steps: obtaining a keyword; on the basis of the obtained keyword, manufacturing the attribute information of the keyword, wherein the attribute information comprises a name, Pinyin, a keyword category, a keyword priority and an administrative division number, and the keyword category comprises a word size, a department category, a road name, an administrative region name and a commonly used word; and on the basis of the attribute information of the keyword, establishing the keyword bank. Therefore, accuracy and speed during keyword retrieval can be guaranteed, and a better use feeling is brought for the user of the vehicle navigation device.

The invention discloses an arc light monitoring and protecting system, wherein two light collecting ports are connected with a photoelectric converter, the photoelectric converter is connected with a light sensitivity regulating part, the input is connected into a single-chip microcomputer ATmega16A, A, B and C current receiving ports are connected with a current sensitivity regulating part, the current sensitivity regulating part is connected with the single-chip microcomputer ATmega16A, the programmable logic function is inputted into the single-chip microcomputer ATmega16A, the output of the single-chip microcomputer ATmega16A is divided into two lines which are respectively connected with a relay, the output is connected into a protection loop, the single-chip microcomputer ATmega16A is connected with a 485 communication module, and the 485 communication module is connected into a power integrated automation system or a monitoring host after conversion. By utilizing the arc light monitoring and protecting system, the fast protection problem when arc light is generated due to short-circuit of a branch circuit of a feeder cabinet can be thoroughly solved, the short-circuit fault of the feed branch circuit of a substation can be avoided, the problem of wide-area burning of the substation can be avoided, and the speed at a trip outlet of the relay is controlled within 10 milliseconds.

The invention discloses an energy-saving comprehensive plant management and control system based on photovoltaic power generation. The system comprises a master control module, a photovoltaic power generation and mains output module, a dust data acquisition module, an environmental data acquisition module, an electrical parameter acquisition module, a storage module, a display alarm module, an indoor environment adjustment module, a dust adjustment module, a wireless communication module and a mobile receiving control terminal. The comprehensive control system can monitor dust concentration, harmful gas concentration, microbial concentration, negative ion concentration and temperature and humidity information in a plant in real time, and can automatically control dust concentration and environmental parameters in a workshop as needed; meanwhile, the system is powered through combination of photovoltaic power generation technology and mains, light energy is converted into required power energy, energy pressure is relieved, pollution is reduced, and energy saving and environmental protection effects are achieved; besides, a standby power supply can be provided after power failure, the anti-risk property of the system is improved, and broad application prospect is realized.

The invention provides a plastic extruder, which can solve the problems that a traditional plastic extruder cannot stir raw materials sufficiently, and the power consumption of a motor is large. With the plastic extruder, the extrusion quality is ensured, and the production cost is reduced. A feeding device is arranged on a machine barrel; an external heating device is arranged on the periphery of the machine barrel in sections; screw blades extending along the axial direction is arranged on the periphery of a screw. The plastic extruder is characterized in that the screw comprises a feeding section screw rod and a discharge section screw rod connected with each other in the axial connection; the feeding section screw rod is coupled to an output shaft of a drive motor; one end of the discharge section screw rod is connected with the feeding section screw rod while the other end of the discharge section screw rod is connected with an extrusion die of the discharge hole section of the machine barrel; the discharge section screw rod is in the shape of a hollow barrel; a screw blade extending along the axial direction is arranged on the outer periphery of the feeding section screw rod; screw blades which are in the same direction as the screw blade at the outer periphery of the feeding section screw rod are arranged on the outer periphery and the inner periphery of the hollow barrel-shaped discharge section screw rod; the screw blade at the outer periphery of the feeding section screw rod and the screw blade at the outer periphery of the discharge section screw rod are connected to form a whole body.

The invention provides a vulnerability detection method and system, and the method comprises the steps: responding to a vulnerability detection request, and determining a to-be-detected object; determining a target vulnerability rule list at least based on the to-be-detected object and the performance score value of each vulnerability rule in a rule base, wherein a plurality of target vulnerability rules are recorded in the target vulnerability rule list; performing vulnerability scanning on the to-be-detected object based on the target vulnerability list; generating feedback information at least based on the scanning result; and updating a performance score value of the target vulnerability rule based on the feedback information. According to the vulnerability detection method, the optimal vulnerability rule can be automatically determined and updated, so that the success rate and speed of each vulnerability detection are ensured.

The invention relates to a high-efficiency control system of a disc water filter and a control method. A water inlet end of the disc filter is connected with a three-way valve; an outlet end of the disc filter is connected with a pneumatic cutoff valve; an electromagnetic valve I and an electromagnetic valve II are arranged on the three-way valve and the pneumatic cutoff valve respectively and connected to a PLC (programmable logic controller); the disc filter and the three-way valve are connected with a forward filtration pipeline and a reverse cleaning pipeline; the PLC circularly controls opening and closing of the electromagnetic valves to further switch opening and closing of the three-way valve and the pneumatic cutoff valve for forward water filtration and reverse disc filter cleaning; the defect of power pipeline blocking caused by dirt in water is overcome; a control mode is simplified; backwash water pressure is increased; the backwash time is adjusted flexibly; a fault rateis decreased; the maintenance time is shortened; a running rate of equipment is increased; and normal production is ensured.

The invention relates to an underwear capable of monitoring a fetal electrocardiogram. The underwear comprises a fetal electrocardiogram collecting device and an intelligent handheld mobile terminal, wherein the fetal electrocardiogram collecting device is composed of a pregnant woman underwear, a signal circuit tape and a data collector; and the intelligent handheld mobile terminal is wirelessly connected with the fetal electrocardiogram collecting device. According to the invention, the automatic collection, treatment and display of the fetal electrocardiogram data can be realized, the accuracy and timeliness of the fetal electrocardiogram detection can be promoted, the mental stress of manual feel of a pregnant woman can be relieved, and the practical value is ultrahigh. Compared with similar fetal heart monitoring products, the product provided by the invention is a wearing type fetal electrocardiogram monitor and is more convenient than the prior art. No energy is inputted into the body of the pregnant woman in a data collection process. Compared with Doppler ultrasound detection, the underwear provided by the invention is safe and free from side effect, is capable of collecting data in real time, and is capable of realizing all-weather monitoring so as to greatly promote the safety of the pregnant woman and fetus.

The invention belongs to the technical field of dredging and cleaning the grouting channel of a shield machine tail shield, and relates to a self-advancing and self-rotating shield machine grouting channel high-pressure dredging device. The self-advancing and self-rotating shield machine grouting channel high-pressure dredging device comprises a connecting cylinder body and a rotating spray head,wherein the rotating spray head is coaxially arranged with the connecting cylinder body, and a rotating connecting assembly is arranged between the rotating spray head and the connecting cylinder body; the rotating spray head is a cylindrical hollow structure with a sealed front end and a rear end communicating with the connecting cylinder body; and at least two front spray holes and at least tworear spray holes are formed in the rotating spray head. According to the self-advancing and self-rotating shield machine grouting channel high-pressure dredging device, the tail shield grouting channel of a shield machine is cut and cleaned by high-pressure water without adding any chemical materials, thereby having great positive significance for protecting the environment. In addition, groutingchannels are mostly curved channels with small radius, the self-advancing and self-rotating shield machine grouting channel high-pressure dredging device can thoroughly clean all solidified slurry inthe channels, reduce the slurry sagging, shorten the shutdown time, and ensure the speed and benefit of tunnel excavation.

The invention relates to a barrier-free traffic crossroad which comprises an overbridge and a ground crossroad body under the overbridge. The barrier-free traffic crossroad is characterized in that the overbridge is provided with a sidewalk and a non-motor vehicle traffic lane on the inner side, and is most characterized in that pedestrians, non-motor vehicles and motor vehicles are separated from one another to move on specific lanes. When passing the crossroad, the pedestrians and the non-motor vehicles are on the overbridge while the motor vehicles at high speed drive under the overbridge, and the pedestrians on the overbridge walk on the inner side while the non-motor vehicles drive on the outer side without mutual interference. The barrier-free traffic crossroad can overcome the coexistence of people and vehicles fundamentally, solve the problem of traffic disturbance at a crossroad thoroughly, and guarantee the safety of people and the speed and the efficiency of driving.

The invention belongs to the technical field of building operations, and particularly relates to a self-balancing outer frame with an annular space lattice structure. The self-balancing outer frame is composed of an annular base frame, a middle frame extending upwards slantwise and a vertically-arranged annular upper frame from bottom to top, wherein an annular area surrounded by the upper frame is smaller than the annular area surrounded by the base frame, and the central axes of the base frame, the middle frame and the upper frame are mutually overlapped. The annular area surrounded by the upper frame is smaller than the annular area surrounded by the base frame, so when the upper frame is used for lifting a weight object during construction, the gravity center of annular space lattices including the weight object is always inside the annular area surrounded by the base frame, thus the stability and safety of the overall annular space lattices are guaranteed. The self-balancing outer frame with the annular space lattice structure has relatively-high stability and safety, the technical problem of horizontal transportation and vertical transportation of a lifting component in construction is also solved, and the convenience and rapidity in installation and construction are guaranteed.

The invention relates to an oil-electric hybrid injection molding machine which comprises a machine base, a charging barrel, a screw rod and a power system. The power system comprises a power motor, an ejection unit, a feeding unit and an oil pressure auxiliary unit, wherein the ejection unit comprises an ejection power part, an ejection transmission part and a first clutch; the feeding unit comprises a feeding power part, a feeding transmission part and a second clutch, and the first clutch and the second clutch are arranged apart on an output shaft; the oil pressure auxiliary unit comprises an auxiliary oil cylinder and an energy accumulator, and during ejection, the energy accumulator releases energy, and a rodless cavity of the auxiliary oil cylinder is filled with oil. On one hand, through cooperation of the double clutches which are coaxially arranged, the same motor can be used for injection and feeding, and the use specification of the motor is reduced; and on the other hand, by adoption of the auxiliary oil cylinder, under oil-electric hybrid condition, especially during ejection, the ejection pressure, speed and precision are ensured; and meanwhile, during post-loosening and backpressure actions, high-precision movement of the screw rod can be realized through oil pressure control.

The invention relates to a control system and method for solving rotation starting impact of a crane, comprising a pilot electric handle, a controller, a proportional pressure reducing valve, a gear pump, an overflow valve, an engine, a three-position five-way electro-hydraulic proportional reversing valve, a one-way valve, a hydraulic motor, a safety valve, a load and a hydraulic oil tank. In the starting stage of a crane rotating platform, before starting, the rotational inertia of the rotating platform is calculated, the angular acceleration of the rotating platform is selected according to experience, and therefore the starting pressure of the starting stage can be calculated in a theoretical mode, and the maximum pressure corresponds to the opening degree of a valve port of the starting stage; when the valve element moves to the opening degree of the valve port corresponding to the pressure, a control signal of the control valve element is subjected to fixed value delay; when the rotating platform starts to rotate, the fixed value delay time is over, and the controller outputs an original control signal curve, that is, the opening degree of the valve port is matched with the load. By solving the matching problem of different loads and the valve port, the problem that pressure overshoot is inconsistent with a flow rising curve when the loads are different can be effectively solved.

A method for fixing concrete column beam formwork chamfering strips comprises the steps that a, concrete column beam formworks, a gas nail gun and gas nails are prepared; b, chamfering strips are prefabricated; c, the chamfering strips are fixed in the concrete beam formwork; d, and the chamfered strips are fixed in the concrete column formwork. The method for fixing the concrete column beam formwork chamfering strips has the advantages that the gas nail gun is more economical than a concrete column beam chamfering machine in price, a chamfering strip device is simple in structure, good in stability and convenient to make, the reinforcing quality and speed and turnover times of the chamfering strips are ensured, concrete members are well formed, the fixed time period of the chamfering strips can be arranged flexibly, the operating efficiency is greatly improved, and the comprehensive cost of construction is reduced.

The invention relates to the field of optical devices, in particular to an optical device coupling device which comprises a coupling clamp. The coupling clamp comprises a base clamp, a material returning device, a fine adjustment frame A and a fine adjustment frame B. The base clamp is arranged on the fine adjustment frame B, the material returning device is arranged on the fine adjustment frame A, a tube core is clamped through the material returning device, a base is clamped through the base clamp, the material returning device and the base clamp are adjusted through the fine adjustment frame A and the fine adjustment frame B, and glue dispensing and glue baking fixing are performed when response voltage signals are coupled to be large. After the technical scheme is adopted, precision of an optical device in coupling is improved, coupling efficiency is improved, production efficiency is improved, product performance is guaranteed, and the production cost of the device is also reduced simultaneously.

The invention discloses a power grid inspection robot positioning method based on 5G and Beidou, and the method comprises the steps: constructing a plurality of 5G base stations in a positioning area, and forming a 5G network platform with a positioning function; detecting positioning data of the inspection robot in the positioning area based on the 5G base stations, and processing and feeding back the positioning data; according to a joint positioning method based on a deep neural network, using a basic positioning technology in a hybrid positioning system to carry out hybrid calculation on positioning data, and obtaining error positioning coordinates; and establishing a feedback positioning decision mechanism on a network layer of the 5G network platform, respectively acquiring different error positioning coordinates by using different positioning information, acquiring an optimal positioning result from the error positioning coordinates, and outputting the optimal positioning result. Through the fusion of the 5G technology and the Beidou navigation system, the precision and speed of the power grid inspection robot positioning technology are solved, the positioning precision is ensured through the joint positioning method and the hybrid positioning system of the deep neural network, and the positioning speed is ensured through the 5G network.

The invention discloses a traditional Chinese medicine hemsley rockvine root processing method capable of keeping a pharmaceutical-effect active ingredient. The traditional Chinese medicine hemsley rockvine root processing method comprises the following steps: selecting fresh hemsley rockvine roots and washing; preliminarily drying the washed hemsley rockvine roots at a temperature being 55-75 DEGC under a nitrogen-gas atmosphere, removing water left after washing on the surface, and taking out after cooling; cutting off bad parts, and cutting the residual parts into slices with thicknesses being 1.5-3.5 mm; primarily drying hemsley rockvine root slices at a temperature being 60-70 DEG C, preliminarily drying for 15-25 minutes under nitrogen-gas atmosphere, and taking out after cooling; putting the preliminarily dried hemsley rockvine root slices into a drying and refrigerating room to refrigerate to 3-7 DEG C; adopting a quick freezing technology for freezing the refrigerated hemsleyrockvine root slices to a temperature being -25 DEG C to -125 DEG C within 3-35 minutes, blowing dried non-oxidative gas to the surfaces of frozen hemsley rockvine root slices, and further drying until moisture content is 1.4-2.9%. The drying technology, the freeze-drying technology and the gas-flow drying technology are comprehensively applied, and the atmosphere, the temperature and the time are controlled in each step, so that the retention effect of the traditional Chinese medicine active ingredient is greatly improved in a drying process.

The invention discloses a method for compressing data of a relational database. The method comprises the following steps: defining an operation entity, an operation action object and operation action data; defining a static entity, a static action object and static action data; defining a dynamic entity, a dynamic action object and dynamic action data; associating the operation entity and the static entity to form an operation entity-static entity association relation table; associating the operation entity and the dynamic entity to form an operation entity-dynamic entity association relation table; and compressing and combining the operation entity-static entity association relation table and the operation entity-dynamic entity association relation table based on the same operation entity, the static entity, the dynamic entity or the action object so as to form a database general relation table. The method for compressing the data of the relational database pertinently compresses the relational database in terms of the characteristics of an online forum, effectively improves the space utilization rate, and further ensures the data security and data access speed of the online forum.