74results about How to "Solve filtering problems" patented technology

The invention relates to the filtering method and device of HTTPS encrypted website, and a computer equipment thereof, and belongs to the technical field of communication security. The method comprises the steps of: acquiring an encrypted data packet sent to the HTTPS encrypted website; analyzing an IP (Internet Protocol) address in the encrypted data packet; matching the analyzed IP address with an IP address with a blacklist identifier and / or an IP address with a whitelist identifier; when the analyzed IP address is successfully matched with the IP address with the blacklist identifier, blocking the corresponding encrypted data packet; and when analyzed IP address is successfully matched with the IP address with the whitelist identifier, releasing the corresponding encrypted data packet. The method provided by the invention analyzes the unencrypted IP address in the encrypted data packet and matches the IP address with the IP addresses in the prestored blacklist and the whitelist; if the IP address is matched with the IP addresses in the prestored blacklist and the whitelist, the corresponding data packet can be filtered according to the matched blacklist or whitelist; and thus, the visit to the encrypted URL (Uniform Resource Locator) website can be filtered.

The invention discloses a negative pressure suction type filter for aquatic product detection, and aims to provide the negative pressure suction type filter able to effectively solve the problem that during vacuum pumping, external gas enters a vacuum pumped cavity and results in insufficient negative pressure in the vacuum pumped cavity so as to affect the filtration of a sample extracted solution. The negative pressure suction type filter includes vacuum pumping equipment, a main box body having an enclosed cavity, a placement through hole arranged on the top of the main box body and communicated with the cavity of the main box body, and a filter cylinder and a communicating airtight structure inserted in the placement through hole.

The invention discloses a sewage treatment apparatus for intensively replacing a filtering device, and a replacement method thereof. The apparatus comprises a box body, a filter frame is arranged at the top of the inner cavity of the box body, the top of the filter frame extends to the outside of the box body, the tops of two sides of the filter frame are fixedly connected with support blocks, thebottoms of the support blocks are in contact with the top of the box body, the top of the left side of the box body is fixedly connected with an electric telescopic rod, the bottom of the electric telescopic rod is fixedly connected with a horizontal plate, the right end of the horizontal plate is fixedly connected with a first motor, and the bottom of the rotating shaft of the first motor is fixedly connected with a buffer mechanism. The apparatus has the advantages of intensive dismounting replacement of a filter plate, and good filtering effect, and solves the problem of the influences ofobstruction of the filter plate, easily caused by accumulation of impurities on the filter plate in the long-time filtering process due to inconvenient intensive replacement of most filter plates fixedly mounted in existing sewage treatment apparatuses, on sewage purification.

The invention discloses a washing machine inner cover with spraying and filtering functions and a washing machine. The washing machine inner cover comprises an upper cover and a lower cover, wherein a spraying water cavity is arranged between the upper cover and the lower cover and is communicated with a circulation water inlet, the lower cover is provided with spraying holes, and a circulation water filtering device corresponding to the spraying holes is detachably arranged between the upper cover and the lower cover. An accommodating space communicated with the circulation water inlet is formed in the spraying water cavity through buckling the upper cover and the lower cover, and the circulation water filtering device is detachably arranged in the accommodating space. According to an inner circulation system of the washing machine, a water discharging opening formed at the bottom of an outer barrel sequentially passes through a circulation water pump and a circulation water path to reach the circulation water inlet arranged at the upper part, the circulation water inlet is formed in an outer barrel cover, and when the inner cover is closed, the circulation water inlet is communicated with the spraying water cavity. The washing machine inner cover has the characteristics that the spraying range is wide, the utilization rate of spraying water is high, and the spraying water can be filtered; in addition, the structure is simple, the production cost is low, and the use and the dismounting are convenient.

The invention belongs to the field of chemical processing, and particularly discloses a method and a device for preparing 3,4-dichloroaniline without solvent. The method includes using 3,4-dichloronitrobenzene as a raw material, adding an assistant and a novel catalyst into the 3,4-dichloronitrobenzene, feeding hydrogen into a hydrogenation kettle to react continuously under certain pressure and at certain temperature, and collecting reacted hydrogenated liquid into a hydrogenated liquid tank via a filter; and blowing a filtered catalyst into the hydrogenation kettle to be reused via the filter. The method and the device have the advantages that a process is simple in operation, production cost is low, automatic control degree is high, yield of product is also high, quality is good, side reaction is little, reaction conditions are moderate, security is guaranteed, labor intensity of workers is low, and the method and the device are suitable for wide popularization and application.

The present disclosure discloses a system and method of traffic filtration at DDoS-attack detection. The present disclosure relates to a system and method for filtering network traffic to protect a server from a distributed denial-of-service (DDoS) attack, and computer readable storage medium having instructions for filtering network traffic to protect a server from a distributed denial-of-service(DDoS) attack. The described technique includes intercepting data from a network node to the computing device responsive to detecting a computing device is subject to a DDoS attack. The technique further includes determining one or more data transmission parameters based on the intercepted data, assigning a danger rating to the network node, and changing the danger rating of the network node based on application of a filter and on the data transmission parameters. The described technique limits a transmittal of data from the network node to the computing device if the resultant danger ratingof the network node exceeds a threshold value.

The invention relates to an oil-water well stratigraphic reservoir water-injection decontamination filtering self-cleaning device. With the device, an execution mechanism can be operated such that back-wash self-cleaning can be performed. The device comprises an upper flange valve cover with the execution mechanism, and a housing cylinder body with a flange on the upper part and a sealing head on the lower part. An inner cylinder body with a Trumpet-opening copper-powder-particle-sintered filtering sieve on the upper part is arranged inside the housing cylinder body. The housing cylinder body is respectively provided with a water inlet pipe with a valve, a water outlet pipe with a valve, and a sewage discharge pipe with a valve. During a normal operation process, the execution mechanism valve rod seal is elevated; inlet water flows through the inner cylinder body with the copper powder particle sintered filtering sieve, and impurities are retained on the tapered surface of the trumpet opening, such that purposes of filtering and sterilizing are achieved. During a self-cleaning process, the execution mechanism valve rod seal is sealed with a sealing groove of the inner cylinder body; water flows through the trumpet opening tapered surface, and back-washes the wall surface of the inner cylinder body; and a sewage-discharge valve is opened, such that sewage-discharge back-wash is carried out. With the device provided by the invention, sterilization, filtration and back-wash self-cleaning can be realized with simple operations; and an oil-water well stratigraphic reservoir water-injection decontamination filtering problem can be effectively solved.

The invention discloses an underground filter device for well logging during drilling. The filter device is provided with a screw shaft, a filter net, a sleeve, an upper connector and a lower connector, wherein an annular drilling fluid inlet is formed in the lower connector, and a post-filter annular drilling fluid outlet is formed in the upper connector. According to the technical scheme, a low pressure area is formed at the inlet by virtue of the rotation of the screw shaft, the annular drilling fluid is sucked into a test device, the filter fluid passes through the filter net to enter a filter fluid cavity under the extrusion effect of the screw shaft, and solid-phase particles are discharged to the outlet. The filter device can work continuously in an underground severe environment such as high temperature, high pressure and high corrosion and has a function of initiatively scraping a filter cake and backwashing the filter net, and the problem of filtering the underground solid phase can be solved; meanwhile, the underground filter device has characteristics of small size, simple structure, convenience in installation, reliability in work and the like.

The invention provides an air filter self-cleaning control method and an air filter self-cleaning control device. According to the method, the pressure difference between the exterior of a filtering cylinder and the pipe opening of a clean air outlet pipe is obtained; whether the pressure difference is smaller than an abnormal threshold value is judged; if the pressure difference is smaller than the abnormal threshold value, diaphragm electromagnetic valves are sequentially opened according to a preset first cleaning period, and blowback gas source spraying nozzles are controlled by the openeddiaphragm electromagnetic valves to clean each filtering cylinder; if the pressure difference is not smaller than the abnormal threshold value, whether the pressure difference is between an alarm threshold value and a limit threshold value is judged; and if the pressure difference is between the alarm threshold value and the limit threshold value, the diaphragm electromagnetic valves are simultaneously opened according to a preset second cleaning period, and the blowback gas source spraying nozzles are controlled by the opened diaphragm electromagnetic valves to clean each filtering cylinder.According to the method provided by the invention, the filtering cylinder corresponding to the opened diaphragm electromagnetic valves are cleaned, and the filtering cylinder corresponding to other non-opened diaphragm electromagnetic valves can normally filter dust-containing air, so that the problem that the filtering of the dust-containing air must be stopped in a filtering cylinder cleaning process in the prior art is solved.

The invention discloses an information forwarding method based on an International Electrotechnical Commission (IEC) 61850data set. The method comprises steps of (1) constructing a scheduling data set forwarding information module for every scheduling system; (2) loading the scheduling data set forwarding information modules by using a scheduling system; (3) loading the scheduling data set forwarding information modules of the scheduling system which is communicated with a substation by using the substation, and constructing the configuration of the scheduling data set forwarding information module to a forwarding information data module subset; (4) enabling the substation to use the sane data set to generate a report example, sending a non-buffering report directing and executing the step (5) by using a buffering report, and (5), acquiring the corresponding relation between the scheduling system and the report example, modifying the data set associated with the report example and deleting data which cannot meet a rule of a buffering region. The report information can be filtered for different clients, the report service of different forwarding information modules is provided, and the problem of forwarding information filter of the substation and the scheduling of the IEC 61850 communication is solved.

The invention discloses a wet production method of high-modulus sodium silicate, particularly a production method of special water glass for a petrochemical catalyst, and solves the problems that high-modulus sodium silicate cannot be produced by a wet method and a high-modulus sodium silicate solution is difficult to filter. Compared with dry production methods, the wet production method saves 70 kg of standard coal and reduces 0.7-0.8 ton of emitted carbon dioxide during the production of each ton of high-modulus sodium silicate, and has obvious economic and social benefits.

The invention discloses an oil pollution separator. The oil pollution separator comprises a tank body and a cover. The tank body and the cover are fastened tightly by a press buckle unit. A water inlet, a water outlet and a liquid level pipe are arranged on the tank body. A separator plate unit is arranged in the tank body. The inner space of the tank body is divided into a primary separation zone, a settling zone and an oil pollution separation zone, wherein the primary separation zone, the settling zone and the oil pollution separation zone are communicated. A first separation sieve is arranged in the primary separation zone. A second separation sieve is arranged in the oil pollution separation zone. The oil pollution separator has a simple structure, a low cost and a wide application scope, can solve effectively kitchen oil pollution filtration problems, can reduce the difficulty of subsequent water treatment, and satisfies energy-saving and environmentally friendly requirements.

The invention discloses a sterilization tank wastewater recovery pool comprising a recovery pool body, a water conveying pipe, a semicircular block I, a semicircular block II, an arc-shaped clamping plate, a spring I, a fastening bolt I, a nut I, an elastic gasket, a hinge, a fixing ring I, a fixing ring II, a T-shaped rod I, a T-shaped rod II, a spring II, a fastening bolt II, a nut II, a springIII, a rack I, a rack II, balls, a filter screen, a fixing block, a T-shaped rod III, a T-shaped rod IV, a T-shaped block, a limiting groove and a return spring. According to the invention, the fastening bolt II is screwed, and then the fastening bolt II moves along the nut II; the fastening bolt II moves to be separated from the rack I; under the action of the elastic force of the spring III, therack I moves into a groove to be separated from the rack II; under the action of the elastic force of the spring II, the T-shaped rod I moves to drive the filter screen to move upwards; the filter screen moves upwards to filter impurities in waste water; and when the filter screen moves to the upper side of the water surface of the waste water, and impurities on the filter screen are convenient to clean by users.

The invention relates to an injecting decreasing recycling method for water produced in a gas filed. The method is characterized in that A / O / MBR-catalytic ozonation-efficient hardness removing and filtering-membrane distillation processes are carried out to effectively remove suspensions, organic matters, salt and ammonia nitrogen in wastewater, so that the problem of excessively high indexes suchas the suspensions, the organic matters, ammonia nitrogen and chlorides in injecting decreasing recycling process of the water produced in the gas field can be solved; the re-injecting volume of thewastewater is effectively decreased; in addition, the industrial low-temperature waste heat is utilized to realize the injecting decreasing recycling of the water reproduced in the gas field; and theobtained membrane distillation water is recycled for supplementing recycling water; and the concentrated water obtained in membrane distillation is re-injected.

The invention provides an antibacterial breathable protective garment. The breathing problem during the sealing performance in the use process is effectively solved; when the protective garment is worn for a long time, air in the protective garment does not circulate well, and the body cannot be cooled through wind power. The technical scheme is as follows: the antibacterial breathable protectivegarment is characterized by comprising a jacket and trousers which are integrally connected in a sealing manner, a hood fixedly connected to the neck of the jacket, an air purification device fixedlyconnected through a belt at a waist part; and a one-way exhaust device communicated into the protective garment. A filtering piece can be automatically replaced according to the filtering time, meanwhile, the seamless connection can be achieved when the filtering piece is replaced, it is guaranteed that unfiltered air cannot enter the protective garment in the replacing process, and meanwhile, theair pressure in the protective garment can be adjusted in real time according to the air pressure in the protective garment.

The invention relates to a reduced-injection standardized discharge method for high-sulfur wastewater in oil and gas fields. The method includes the following steps: 1) removing majority of H2S in the high-sulfur wastewater through negative pressure desulfurization; 2) performing chemical reaction to residual H2S in the water generated through the negative pressure desulfurization to form precipitates; 3) performing flocculating settlement to the water generated through the chemical reaction desulfurization; 4) filtering the water generated by the flocculating settlement through a ceramic membrane filtration unit; 5) separating and concentrating the water generated through the ceramic membrane filtration in a high-effective electro-dialysis unit; and 6) performing ozone catalytic oxidization to the fresh water generated through the high-effective electro-dialysis, and discharging the water, which meets the standards, after the ozone catalytic oxidization. By means of the reduced-injection standardized discharge method, sulfides, suspension solids, organic matters, chlorides and oil in the high-sulfur wastewater are deeply removed, and the sulfur content, suspension solid content and oil content of eletro-dialyzed concentrated water satisfy standard of reinjection water of oil and gas fields. The water outputted after the ozone catalytic oxidization meets the standard and is discharged.

The invention relates to a kitchen air conditioner with a panel capable of being automatically opened and closed and lampblack capable of being filtered. The kitchen air conditioner comprises a top cover, a bottom shell, and an evaporator located between the top cover and the bottom shell, and further comprises an air inlet, a rough filtering filter net, a fine filtering filter net, a motion mechanism and the panel; the air inlet is formed in the outer side of the evaporator and located between the top cover and the bottom shell; the rough filtering filter net is arranged on the outer side ofthe air inlet; the fine filtering filter net is arranged on the outer side of the rough filtering filter net; the motion mechanism is located above the air inlet; the panel is connected with the motion mechanism corresponding to the air inlet, and located on the outer side of the fine filtering filter net; and the motion mechanism drives the panel to swing up and down relative to the top cover soas to open or close the air inlet. The kitchen air conditioner with the panel capable of being automatically opened and closed and the lampblack capable of being filtered has multiple anti-lampblack functions, the problem of lampblack filtration of the kitchen air conditioner is effectively solved, the anti-lampblack and lampblack filtration effects are greatly improved, and thus the cleaning burden on a user is lowered.

The invention discloses a washing machine inner cover with spraying and filtering functions and a washing machine. The washing machine inner cover comprises an upper cover and a lower cover, wherein a spraying water cavity is arranged between the upper cover and the lower cover and is communicated with a circulation water inlet, the lower cover is provided with spraying holes, and a circulation water filtering device corresponding to the spraying holes is detachably arranged between the upper cover and the lower cover. An accommodating space communicated with the circulation water inlet is formed in the spraying water cavity through buckling the upper cover and the lower cover, and the circulation water filtering device is detachably arranged in the accommodating space. According to an inner circulation system of the washing machine, a water discharging opening formed at the bottom of an outer barrel sequentially passes through a circulation water pump and a circulation water path to reach the circulation water inlet arranged at the upper part, the circulation water inlet is formed in an outer barrel cover, and when the inner cover is closed, the circulation water inlet is communicated with the spraying water cavity. The washing machine inner cover has the characteristics that the spraying range is wide, the utilization rate of spraying water is high, and the spraying water can be filtered; in addition, the structure is simple, the production cost is low, and the use and the dismounting are convenient.

The invention discloses an APU device driven by a diesel engine, and belongs to an auxiliary power system on a car. According to the technical scheme, the APU device driven by the diesel engine comprises an APU cabin, the diesel engine, an electric generator, an air inlet filter device and an exhaust device are arranged in the APU cabin, an output shaft of the diesel engine is connected with the electric generator, an air pre-filter of the air inlet filter device is arranged above the middle of the APU cabin, the air filter air inlet end of the air inlet filter device is connected with the air pre-filter, the air outlet end of an air filter is connected with an air inlet of the diesel engine, the air pre-filter is connected with the air filter through a bending pipe, the air outlet end of the air filter is connected with the air inlet of the diesel engine, the air pre-filter is connected with the air filter through a bending pipe, the exhaust device comprises a silencer and a silencer tail pipe, the silencer is connected with an exhaust opening of the diesel engine through an exhaust pipe, an air outlet of the silencer tail pipe is horizontally led out of the position, close to the upper portion, of one side of the APU cabin, the air outlet end face of the silencer tail pipe is downward in an inclined manner, and a waste gas ejection pipe is arranged between the silencer and the silencer tail pipe.

The invention discloses a method for rapidly recovering rhenium, copper and lead from copper smelting waste acid and a device for implementing the method. According to the method, the copper smelting waste acid is subjected to lead removing through filtering, lead residues with the lead content higher than 55% are obtained and taken as lead extraction raw materials, the lead extraction raw materials are subjected to targeted rhenium precipitation, rhenium-rich residues are obtained and are subjected to hot-pressing oxidizing leaching, a rhenium-rich leaching agent is obtained, the rhenium-rich leaching agent after evaporation and concentration is subjected to KCl rhenium precipitation and recrystallization, potassium perrhenate is prepared, and a liquid obtained after rhenium precipitation is vulcanized for copper deposition. The device comprises a rhenium and copper precipitant storage tank, a precipitation tank, a flocculating agent storage tank, a flocculation reaction tank, a reaction kettle, an evaporation-crystallization device, a centrifugal separator, a waste acid anti-gravity-osmosis filter, a rhenium-rich copper residue anti-gravity-osmosis filter, a filter press, a rhenium and copper precipitation tank steam heating system, a copper precipitation tank steam heating system and a slurry pump. The method and the device have the characteristics of low investment, rapid and short procedures, simple and efficient operation, and high recovery rate, and are clean and environment-friendly.

The invention provides a drum-type filtering device. The drum-type filtering device comprises a drum wheel, a filter belt, a driving roller device, a back-flushing device, a soiling solution return pipe, a detection switch, a scraping device, a residue filter tank, a purified liquid tank, a brushing roll and a device main body, wherein a soiling solution flows into a cavity of the drum wheel through the soiling solution return pipe, liquid is filtered by virtue of the filter belt and flows into the purified liquid tank for being machined by a machine tool, impurities in the soiling solution are blocked by the filter belt and are continuously settled to form a filter cake, after the filter cake is accumulated to a certain thickness on the surface of the filter belt, the filter belt rotatesalong with the driving roller device, and the filter belt with the surface attached with the filter cake part rotates outwards, so that the cycle use of the filter belt is realized; meanwhile, the device is further provided with the scraping device, a drying device and the like, so that the filter cake can be removed and dried; and the device has the advantages of good filtering performance, reliability in operation, simple and compact structure, low maintenance cost and the like, and the cycling filtration can be realized.

The invention discloses a filtering apparatus for pertinently solving a filtering apparatus of fine solid particles of an edible oil pre-squeezing technology. An ultralow-speed speed reducer is adopted to drive a chain of a scraper plate having a filter screen in order to transfer solid particles at the bottom of a cylinder to the upper portion of the cylinder; and the upper portion is provided with a filter sieve plate, and after crude edible oil is filtered, oil residues go through the oil residue scraper plate and return to an oil squeezer for oil squeezing. The crude oil containing fine solid particles are separated in a settling chamber to realize a good filtration effect of the crude oil.

The invention provides a preparation method of a manganese chloride tetrahydrate bulk drug. The preparation method comprises the following steps: mixing manganese monoxide with water to obtain turbid liquid; slowly dropwise adding hydrochloric acid into the turbid liquid to obtain a first reaction liquid; heating the first reaction solution to obtain a second reaction solution; adding food-grade diatomite into the second reaction solution, and stirring to obtain a first mixed solution; filtering the first mixed solution to obtain a first filtrate; adjusting the pH value of the first filtrate; adding manganese powder into the first filtrate, and heating to obtain a third reaction solution; adding the food-grade diatomite into the third reaction solution, and stirring to obtain a second mixed solution; filtering the second mixed solution to obtain a second filtrate; adjusting the pH value of the second filtrate; and purifying the second filtrate to obtain the manganese chloride tetrahydrate bulk drug. The product prepared by the method has very high safety.

The invention discloses a wet production method of high-modulus sodium silicate, particularly a production method of special water glass for a petrochemical catalyst, and solves the problems that high-modulus sodium silicate cannot be produced by a wet method and a high-modulus sodium silicate solution is difficult to filter. Compared with dry production methods, the wet production method saves 70 kg of standard coal and reduces 0.7-0.8 ton of emitted carbon dioxide during the production of each ton of high-modulus sodium silicate, and has obvious economic and social benefits.

The invention relates to an injecting decreasing recycling method for water produced in a gas filed. The method is characterized in that catalytic ozonation-A / O / MBR-efficient hardness removing and filtering-membrane distillation processes are carried out to effectively remove suspensions, organic matters, salt and ammonia nitrogen in wastewater, so that the problem of excessively high indexes suchas the suspensions, the organic matters, ammonia nitrogen and chlorides in injecting decreasing recycling process of the water produced in the gas field can be solved; the re-injecting volume of thewastewater is effectively decreased; in addition, the factory low-temperature waste heat is utilized to realize the injecting decreasing recycling of the water reproduced in the gas field; and the obtained membrane distillation water is recycled for supplementing recycling water; and the concentrated water obtained in membrane distillation is re-injected.

The antibacterial breathable protective clothing provided by the present invention effectively solves the problem of breathing in tightness during use, and the problem that the air inside the protective clothing does not circulate and the body cannot be cooled by wind force when worn for a long time. The technical solution is that it is characterized in that it includes a protective clothing composed of an integrally sealed jacket and trousers, a hood is fixedly connected to the neck of the jacket, an air purification device is fixedly connected to the waist through a belt, and is connected to the protective clothing. One-way exhaust device, the invention can automatically replace the filter according to the filtering time, and at the same time, it can realize seamless connection when replacing the filter, ensuring that unfiltered air will not enter the protective clothing during the replacement process, and at the same time can The air pressure in the protective clothing is adjusted in real time according to the air pressure in the protective clothing.

The invention relates to the field of automobile light control, and particularly discloses an automobile anti-dazzling rearview mirror control system and method, and the method comprises the steps that a collection module collects an illumination data set and stores the illumination data set into a data queue; a sorting module sorts the illumination data in the data queue from small to large according to the light intensity to obtain a light intensity sorting list; a screening module screens out two groups of illumination data groups in the middle of the data queue; a calculation module calculates an illumination average value of the screened illumination data set; and a processing module performs corresponding preset processing according to the illumination average value. Through the steps, the influence of transient strong and weak light on the judgment of the light intensity of the automatic anti-dazzling rearview mirror can be effectively avoided, so that the meaningless change ofthe reflectivity of the rearview mirror is avoided.

The invention discloses a paste viscous material filter device including a frame type support; the lower part of the frame type support is a neutral position; a barrel body is arranged on the frame type support; the lower part of the barrel body is provided with a filter screen, and the filter screen corresponds to the neutral position; the upper part of the barrel body is provided with an opening, and the opening is provided with a supporting cross beam or a supporting end cover; the supporting cross beam or the supporting end cover is vertically provided with a nut; the nut is internally provided with a lifting threaded rod; one end, in the barrel body, of the lifting threaded rod is provided with a press plate, the other end of the lifting threaded rod is arranged outside the supporting cross beam or the supporting end cover and is provided with a handle. When the paste viscous material filter device is used, a paste viscous material in the barrel body is pressurized and filtered by using the pressure action of the press plate and the lifting threaded rod, so that a useful material is filtered out through the filter screen, and impurities remain on the filter screen; the paste viscous material filter device is simple in structure, is economical and practical, and solves the filtration problem of harmful impurities in the paste viscous material.

The invention relates to the technical field of network spam filtering, in particular to a social network spam filtering method based on distributed matrix decomposition feature extraction. The social network spam filtering method based on distributed matrix decomposition feature extraction comprises the following steps that (1) a user and attribute matrix of a social network is established; (2) feature extraction is conducted on the user and attribute matrix of the social network based on distributed matrix decomposition; (3) potential feature vectors are classified, and whether the potential feature vectors are social network spam or not is judged. The method is beneficial to efficiently filtering spam data in the social network.