83results about How to "To achieve the purpose of filtering" patented technology

The invention provides an intelligent forest land and building extraction method for cultivated land protection, and belongs to the technical field of identification. The method is characterized by matching homonymous points with multi-modal remote sensing images; extracting rough land class boundaries of the forest land and the building by utilizing an attention enhancement semantic segmentationmethod; and performing polygon boundary optimization on the building and forest land elements by utilizing an image morphological filtering method and a probability graph model respectively to obtainaccurate land boundaries. According to the method, accurate registration is carried out on the multi-modal remote sensing images so that a problem of information loss of a single-source remote sensingimage due to cloud shielding is solved, and the problem of difficult registration caused by significant nonlinear geometric distortion and radiation difference among the multi-modal remote sensing images is solved too; based on a forest land and building semantic segmentation method based on attention enhancement, the problem of low land utilization efficiency of visual discrimination is solved;and based on a ground class boundary accurate extraction method of an image form and a vector topology rule, the boundary of a ground object is optimized, and the problem of accurate and intelligent extraction of forest land and buildings is solved.

The invention provides an aeroengine load spectrum filtering method based on a rain-flow counting method. The aeroengine load spectrum filtering method comprises steps that (1), rain-flow filtering for original spectrum of aeroengine load spectrum is carried out to acquire rain-flow filtering spectrum; and (2), based on the rain-flow filtering spectrum, points of multiple original load spectrum are added, and the filtering spectrum based on the rain-flow method is lastly acquired. Through the method, the load loading/unloading path information can be reflected, namely, on the basis of deleting small circulation, circulation peak/valley values of the filtering spectrum and the original spectrum are guaranteed to be identical, and the path of the original spectrum is reserved to a maximum degree; singular points can be more effectively eliminated, threshold filtering for signals is carried out to eliminate noise of the signals, and signal processing efficiency is improved. The method is advantaged in that research on flight parameter pre-processing and outlier elimination in an aeroengine load spectrum compilation process is realized.

The invention discloses a liquid reservoir which comprises a lower reservoir body and a filter barrel, wherein a refrigerant inlet and a refrigerant outlet are formed at the lower end of the lower reservoir body; the filter barrel is matched with the inner wall of the lower reservoir body to form a liquid flow cavity; the filter barrel comprises a barrel wall made of a filter material, an upper liquid flow barrel and a lower liquid flow barrel; the upper liquid flow barrel and the lower liquid flow barrel are arranged at two ends of the barrel wall and communicated with each other; the lower liquid flow barrel and the liquid flow cavity are communicated with the refrigerant inlet and the refrigerant outlet respectively; and a refrigerant is at least filtered once in a process of flowing from the refrigerant inlet to the refrigerant outlet. The invention also discloses an air conditioner refrigeration system with the liquid reservoir. The refrigerant flows into the liquid flow cavity from the refrigerant inlet, further flows through the filter barrel and flows out from the refrigerant outlet, thus impurities in the refrigerant are stopped in the liquid reservoir, and an aim of filtering the refrigerant is achieved. According to the liquid reservoir, the filter barrel, instead of a non-woven cloth, is utilized as a filter part for the refrigerant, so that the own filter precision of the liquid reservoir is guaranteed, and simultaneously the flow resistance is reduced.

The invention discloses a data filtering method applied to ultrasonic partial discharge detection. A median filter which is an atypical nonlinear filter for completing signal recovery based on sequence statistics is used, aiming at pulse interference possibly existing in the ultrasonic partial discharge detection. Under the one-dimensional condition, the essence is a sliding window with a certainlength, and a signal at the central position of the window is replaced by a median after all values in the window are sorted. When the pulse width is less than half of the window width, the median filtering is very effective to narrow pulse interference. Then, for processing of random noise, after wavelet packet threshold function denoising and singular value decomposition algorithms are compared,a singular value decomposition filtering algorithm based on a singular value energy difference spectrum is provided. The singular value energy differential spectrum defined in the algorithm can welldetermine the order of a reconstruction matrix, so that the singular value contributed by random noise and the singular value contributed by partial discharge signals are distinguished, and a good filtering effect is achieved.

The invention discloses a microstructure fiber with fiber core modified by inverse opal (3DOM three dimensional ordered macroporous material). The method mainly comprises the following steps: preparing a PS or PMMA colloid microballoon solution, and adding a predecessor solution (TEOS or TiBALDH) into the colloid microballoon solution in a certain proportion; growing a segment of colloid crystal in a capillary with a Sol-gel cooperation self assembly method, forming predecessor gel when colloid crystal gap moisture is reduced, and sintering the capillary at high temperature in a box-type furnace and removing the colloid crystal to form an inverse opal composition; vertically cutting two common standard fibers after part coating is removed, inserting the two fibers into the capillary from two ends of the capillary to the inverse opal composition, fixing the fibers with glue, and fixing and packaging the capillary and fibers with a thermoplastic cannula. The microstructure fiber prepared in the invention can be used as a fiber filter and a biomedical sensing member. By using a common standard fiber in preparation, the microstructure fiber can connects a present fibre-optical communication network to facilitate the realization of all-optical sensing network. The microstructure fiber has the advantages of simple preparation, reliability and strong versatility.

The invention discloses a production method of high-purity yellow phosphorus, which relates to a yellow phosphorus production method. The high-purity yellow phosphorus is obtained through the process steps of mixing, diatomite pre-applying, diatomite pre-applying, filtration, acid washing and water washing. The invention has the advantages of simple equipment, low investment, fast effect taking, high yellow phosphorus recovery rate (which reaches more than 99 percent), high product purity (which can reaches 5 to 6 N stages), simple process, convenient operation and safety, and is favorable for industrialization.

The invention relates to a protection-type gauze mask. The protection-type gauze mask comprises a gauze mask body, ear bands and a breather valve arranged on the gauze mask body, and the gauze mask body comprises a face layer, a bottom layer and a filter layer sandwiched between the face layer and the bottom layer. The protection-type gauze mask has the advantages that when a wearer uses the protection-type gauze mask, the breathing resistance is small, breathing is smoother, and the comfort degree of the wearer is improved.

The invention discloses a novel filter capable of realizing backflushing automatic cleaning through waterway conversion, which can be applied to water filtration, or chemical liquid and biochemical reagent filtration. The structure of the novel filter is provided with two water outlet nozzles, and in normal use, water at a water inlet nozzle passes through a filter material in a cylinder body and then flows out through a filter element tube from the first water outlet nozzle to achieve the purpose of filtering; if cleaning is needed, a relative angle between a cylinder head cover and a cylinder head seat can be turned to a specific direction, so that the water at the water inlet nozzle can firstly flow through the filter element tube and the filter material, and flow out from the second water outlet nozzle, and impurities and dirt trapped by the filter material in the normal flow direction of the water can be discharged from a second water outlet along with the water due to the flushing of water in the reverse flow direction so as to achieve the effect of cleaning a filter element. Therefore, the novel filter is ingenious and reasonable in structure, the filter element of the filter can be conveniently cleaned by only turning the relative angle between the cylinder head cover and the cylinder head seat under the condition of not disassembling so as to achieve the function of automatic cleaning, the use is very convenient, and the effect is very ideal.

The invention discloses pretreatment equipment for industrial waste gas. The pretreatment equipment comprises a box body and a gas inlet, wherein the gas inlet is formed in the left side of the box body and penetrates through the box body; a gas outlet is formed in the right side of the box body and penetrates through the gas outlet; a pad plate is arranged at the bottom end of a pulley; a plurality of first springs are arranged at the bottom of the pad plate; the bottom end of each first spring is connected with the inner wall of an inserting groove; slide blocks are arranged at the left sideand the right side of each pad plate; the outer wall of each side bock is provided with a slideway; the slideway is connected with the inner wall of the inserting groove. The pretreatment equipment for industrial waste gas has the advantages that through the gas inlet, the goal that the industrial waste gas can be blown into the device is achieved; through a waste slag opening, the goal of collecting waste materials is achieved; through the gas outlet, the goal of collecting filtered waste gas is achieved; through a motor, the pulley cyclically beats a filter screen to and fro; dust on the filter screen is shook off; the filtering efficiency is improved; the requirements of people are met.

The invention discloses a pressure charging and relieving filtering system and method of high-temperature variable-pressure equipment for solid inlet and outlet materials. The system comprises a cartridge filter and a lock hopper, wherein an inert gas inlet pipe is connected with the top part and the bottom part of the cartridge filter respectively, a sequencing valve C and a current-limiting pore plate are arranged on a pipeline b connecting the bottom of the cartridge filter, the inert gas inlet pipe connecting the top part of the cartridge filter is divided into a pipeline a and a pipeline c, a sequencing valve A is arranged on the pipeline a, the pipeline c is connected with the upper part of the cartridge filter, the pipeline a is combined with an outlet pipeline d at the top part of the cartridge filter, a sequencing valve B is arranged on the combined pipeline e, the pipeline b is combined with a pipeline f between the lock hopper and the cartridge filter, and a finned pipe is arranged on the pipeline f. The filtering method comprises the steps that effluent gas of the lock hopper is mixed with inert gas after being subjected to heat dissipation through the finned pipe, and then the mixed gas enters the cartridge filter. The method integrates a fin radiating method and a blending cooling method to realize the filtering operation of the effluent gas, with high temperature and periodically varied pressure, from the lock hopper.

The invention relates to the field of medical apparatus and instruments and discloses a self-destruction type filtering injector. The self-destruction type filtering injector is characterized in that: a needle cylinder is in an irregular shape and comprises a front part, a back part and a connection surface; the internal diameter of the front part is more than the internal diameter of the back part; a filtering device is arranged at the front top part of the needle cylinder; a resilience sheet is connected with the back of the filtering device; and a piston is in a self-destruction structure and is connected with a push rod. When liquid is injected by the self-destruction type filtering injector, the push rod is pulled so that the filtering device is moved backwards and the liquid enters due to a negative pressure; by stopping pulling the push rod, the filtering device is returned back through the resilient sheet; and positive pressure is formed by pushing the pull rod so that the liquid is discharged through the filtering device. After the liquid is discharged, the piston enters into a 'clamping position' so that the piston is separated and destructed by itself by pulling the push rod back. According to the self-destruction type filtering injector disclosed by the invention, the damage to the human body caused by insoluble particles is avoided or reduced by filtering the insoluble particles in the liquid, and the self-destruction type filtering injector is destructed by itself after being used, thereby preventing the injector from being repeatedly used and avoiding the transmission of hematogenous diseases.

The invention discloses a chemical reaction processing device. The device comprises a reaction main body tank, a pretreatment tank and a feeding hopper, wherein the pretreatment tank is mounted at the top of the reaction main body tank, a connecting valve is mounted at the bottom of the feeding hopper; one side of the connecting valve is communicated with the pretreatment tank through a connecting guide pipe; the side, away from the feeding hopper, of the connecting valve is communicated with the lower portion of the reaction main body tank through a discharging guide pipe; the bottom of the reaction main body tank is fixedly connected with a supporting bottom frame, an inner filtering device is arranged at the lower position in the reaction main body tank, and a reaction liquid discharging switch valve is arranged above the inner filtering device. The invention relates to the technical field of chemical reactions. According to the chemical reaction processing device, the problems that a reaction device does not have the capability of filtering and separating a reacted solution, a single filter screen structure is difficult to clean after being blocked, and the discharge speed of a reaction solution is reduced are solved, filtering and discharge can be continued after the inner filter screen is blocked, and self-cleaning blockage can be completed.

The invention provides an over-temperature protection LED driving power source. The over-temperature protection LED driving power source comprises a hose, a connecting pipe, an airbag, air jetting holes, an air jetting pipe, a filtering cover, round holes, a filtering screen, a desiccant bag and an air inlet hole; the right end of the connecting pipe is provided with the airbag; the lower end of the hose is installed at the middle of the annular side surface of the connecting pipe; the upper end of the hose passes through the lower end surface of the filtering cover and is connected with the air jetting pipe; the air jetting pipe is arranged at the left side of the filtering screen; and the air jetting holes are formed at the right side of the annular side surface of the air jetting pipe. According to the over-temperature protection LED driving power source of the invention, a dust back-blowing function is additionally realized; the air inlet hole is formed at the right end surface of a shell; the filtering cover is assembled at the right end surface of the shell; the filtering screen is installed at the right side of the interior of the filtering cover; the desiccant bag is assembled at the left side of the interior of the filtering cover; and the round holes are formed at the right end surface of the filtering cover. The over-temperature protection LED driving power source of the invention can filter heat-dissipating air. The over-temperature protection LED driving power source of the invention has the advantages of long service life, high stability and high reliability.

The invention discloses an improved filter device, which comprises a fixed frame, a transmission part, and a filter part installed on the fixed frame. The filter part includes a spiral stirring piece and a filter cylinder. One end of the cylinder is provided with a second gear part, the first gear part and the second gear part are arranged coaxially, both the first gear part and the second gear part are driven by transmission parts, the filter cylinder is open at both ends, and the spiral stirring element Inserted in the filter cartridge, the filter cartridge is provided with a plurality of filter holes, the filter cartridge is set with a filter membrane, the filter cartridge is covered with a casing, the bottom of the casing is connected to the water outlet pipe, and the filter part also includes a filter from the filter cartridge A liquid inlet pipe inserted near the open end of the second gear part, and a receiving pipe for receiving solid particles from the filter cartridge at the open end far away from the second gear part. The invention can effectively solve the problems of concentration polarization and membrane fouling on the membrane surface, and significantly improve the permeation flux and filtration effect of the membrane.