189results about How to "Achieve filtering effect" patented technology

The invention provides a target classification and positioning method based on network supervision. The target classification and positioning method comprises the following steps: automatically obtaining a large amount of network image data from a search engine according to the category of a to-be-tested target; filtering to remove noise images to form a training sample set; preliminarily constructing a classification and positioning network; and inputting samples in the training sample set into the preliminarily constructed classification and positioning network to perform feature extraction,classifying the features, obtaining position information of the target object, and training the classification and positioning network. According to the end-to-end fine classification and positioningmethod based on network supervision, massive network images easy to obtain are used as a training set, manual annotation is completely removed, only image-level labels are used, an efficient convolutional network is designed, and algorithms such as global average pooling and class activation mapping graphs are fused, so that the performance of the method exceeds that of a weak supervised learningmethod on fine classification tasks and positioning tasks.

The invention relates to a filter comprising a resonant cavity, an input end, an output end and a harmonic oscillator arranged in the resonant cavity, wherein the input end and the output end are installed on the side wall of the resonant cavity and stretch into the resonant cavity, the input end and the output end are arranged in a mutually perpendicular mode, and metal pieces are attached to the surfaces, synchronously back on to the input end and the output end, of the harmonic oscillator. Due to the fact that the metal pieces are arranged, perturbation can be formed for two degenerate molds, and perturbation amount is large, therefore, the coupling effect of the two degenerate molds can be made to be enhanced, further, a certain bandwidth is formed, and a filtering effect is achieved.

The embodiment of the invention discloses an active EMI filter and a power management device. The active EMI filter comprises an auxiliary source circuit, a current sampling circuit, a voltage-current conversion circuit, a biasing circuit and a current injection circuit. The auxiliary source circuit is used for conducting voltage stabilizing on voltage signals obtained from a power line and outputting the voltage signals which receive voltage stabilizing processing to other circuits for power supply, and common-mode noise currents sequentially pass through the current sampling circuit, the voltage-current conversion circuit and the current injection circuit and are finally injected to a protected area. The biasing circuit can compensate for input signals of the voltage-current conversion circuit according to current signals output by the voltage-current conversion circuit and provide a correct static working point for the voltage-current conversion circuit. According to the active EMI filter and the power management device, distortion of the active EMI filter can be prevented, and the performance and reliability of the active EMI filter are improved.

The invention discloses a Terahertz wave filter, which can be used for absorbing waves in specific frequency bands in Terahertz incident waves to realize filtering. The Terahertz wave filter is characterized by comprising a sub-wavelength metal grating layer of which the grating period is shorter than the incident wave length, a substrate layer which is carried below the sub-wavelength metal grating layer, and a temperature control device which is connected with the substrate layer and is used for controlling the temperature of the substrate layer, wherein the sub-wavelength metal grating layer comprises a metal grid bar and a medium grid bar. The Terahertz incident waves of specific frequencies undergo localized surface plasma resonance on the sub-wavelength metal grating layer, and Terahertz incident waves in frequency bands close to the resonant frequency are absorbed. When the temperature of the substrate layer is changed by the temperature control device, the resonant frequency is changed, and the frequency band of the absorbed waves is changed. By adopting the Terahertz wave filter, tunable filtering is realized.

The invention discloses printing and dyeing sewage treatment equipment. The printing and dyeing sewage treatment equipment comprises a base, wherein a filter box is fixedly connected to the left sideof the top of the base; the inner cavity of the filter box is provided with a filter plate, an activated carbon adsorption plate and a sand and stone filter plate in sequence from top to bottom; the left side of the inner cavity of the filter box as well as the top and bottom of the filter plate are fixedly connected with sealing sleeves. Through arrangement of the activated carbon adsorption plate and the sand and stone filter plate, the effects of filtering and adsorbing sand and activated carbon in the sewage are achieved. Through arrangement of a water pump, the effect of disinfecting thesewage by sucking and discharging disinfectant fluid from the inner cavity of a disinfectant fluid tank to the inner cavity of the disinfection tank is achieved. Through arrangement of a motor, a stirring rod and stirring blades, uniform stirring of the sewage is realized, and the disinfectant fluid can be used for fully disinfecting the sewage. Through arrangement of a high-temperature heating pipe, the effect of high-temperature disinfection of disinfected water is achieved.

The invention discloses a direct current voltage on-line identification method for an active filter. In the method, a reference model for direct-current voltage identification and a single nerve cell with adjustable parameters are set up according to a switch mean model of an inverter, the direct-current voltage is taken as the weighting coefficient of the single nerve cell, and the weighting coefficient is constantly regulated through a learning algorithm so as to realize the tracking of an actual value by an identification value, therefore, a circuit for detecting the direct-current voltage is saved, and the complexity of the whole filtering control circuit is reduced. The direct current voltage on-line identification method for the active filter can effectively reduce the cost of the active filter and the complexity of the hardware, with an accurate identification result.

The invention discloses an air purifier having a dehumidification function. The air purifier having the dehumidification function comprises a box body and a WiFi module. The left side of the box body communicates with a first connection pipe. One end of the first connection pipe penetrates through the box body and extends into the box body. A first supporting rod is fixedly connected with the inner portion of the first connection pipe. The left side of the first supporting rod is fixedly connected with a first draught fan. The right side of the first connection pipe communicates with a second connection pipe. According to the air purifier having the dehumidification function, the air suction effect is achieved through the first draught fan, the effect of discharging the air into the box body is achieved through air outlet pipes, the effect of dehumidifying the air is achieved through a heating plate, the air purifying effect is achieved through a first filter screen, an activated carbon filter layer and an HEPA filter layer, the sterilizing effect is achieved through an ultraviolet lamp tube, and the effect of discharging purified air is achieved through a second draught fan and a first through hole. The air purifier has the dehumidification function and guarantees the production quality of textile products.

The invention relates to a tapered fusing cladding power filter that comprises a fiber for removing an outer cladding and a coating layer. An optical glass layer is connected with and solidified on the fiber and is a tapered body. The outer diameter of the tapered body is gradually decreased along the propagation direction of the light in the fiber. The tapered optical glass layer replaces optical glue so as to improve the heat resistance temperature and a heat conduction coefficient of the material itself. The refractive index of the tapered optical glass layer is greater than the refractive index of the removed outer cladding and the coating layer. By means of a change in the refractive index, the total reflection condition of the cladding light is broken and the low-order mode light is introduced into the tapered optical glass layer. Then, by means of a shape change of the tapered fiber, the low-order mode light is gradually converted to high-order mode light through an increase in the number of times of the internal light reflection and then is filtered out along the surface of tapered fiber. Thus, a filtering effect is achieved. The heat converted in the tapered optical glass layer is conducted by a cooling medium.

The embodiment of the invention discloses an active EMI (Electro-Magnetic Interference) filter. The active EMI filter comprises an auxiliary source circuit, a current detection circuit, an inverse amplifying circuit, a noise injection circuit, a differential mode capacitor and a differential mode inductor, wherein the earth impedance of a positive power line and the earth impedance of a negative power line are different; the differential mode capacitor is connected between the positive power line and the negative power line; the differential mode inductor is connected on the power line with higher earth impedance in the positive power line and the negative power line; one end of the differential mode inductor is connected to the connected node of the auxiliary source circuit and the power line, and the other end of the differential mode inductor is connected to the connected node of the differential mode capacitor and the power line. The differential mode capacitor can enlarge the impedance for the power line with higher earth impedance, so that more low-frequency common-mode noise circuits are merged to the power line with lower earth impedance through the differential mode capacitor. The embodiment of the invention further discloses a power management device, and the power management device comprises the active EMI filter. Through the adoption of the active EMI filter and the power management device, the filtering effect for low-frequency common-mode noise current can be enhanced, and the stability of the active EMI filter is improved.

The invention discloses a medical waste treatment device with disinfection function, which comprises a crushing box and a support table, the left side wall of the crushing box is fixedly connected with a discharge pipe, the support table is located on the right side of the crushing box, the A first transmission roller and a second transmission roller are arranged directly above the support platform, the first transmission roller is located on the left side of the second transmission roller, and the two ends of the first transmission roller are respectively connected with the two first vertical poles. The top of the roller is movably connected through the first bearing, and the two ends of the second transmission roller are movably connected with the tops of the two second vertical rods through the second bearing respectively, and the bottoms of the two first vertical rods and the two second vertical rods are Both ends are fixedly connected with the upper surface of the support platform. The medical waste treatment equipment with disinfection function is fixedly connected with a water tank on the back of the crushing box, and a water pump is fixedly installed on the upper surface of the water tank. proposed question.

The invention relates to the field of sewage treatment, in particular to a tunnel sewage treatment device. The device is realized through the technical scheme as follows: the tunnel sewage treatment device comprises a sewage pool for accommodating sewage to be treated, wherein the sewage pool sequentially comprises a primary sedimentation tank for primarily filtering the sewage, an organic matter treatment pool for decomposing and removing organic matters from the sewage, a third-stage sedimentation tank for further filtering the sewage, and a water collecting pool for collecting purified water in the water flowing direction. The invention aims to provide the tunnel sewage treatment device. Through arrangement of multiple different decontamination pools, the sewage is filtered, decontaminated and degreased and the pH value is regulated; too much physical kinetic energy is not required, so that the tunnel sewage treatment device is energy-saving and environment-friendly.

The invention relates to a DC (Direct-Current) common-mode busbar integrated with an EMI (Electromagnetic Interference) filtering function. The DC common-mode busbar comprises a positive plate, a negative plate, a winding busbar and a capacitance busbar, wherein the winding busbar and the capacitance busbar are formed by overlapping insulating plates positioned between the positive plate and the negative plate. The DC common-mode busbar is characterized in that the positive plate and the negative plate of the winding busbar are fixedly connected with the anode and cathode of the capacitance busbar respectively; and the end part of the winding busbar passes through a magnetic ring twice in sequence. The DC common-mode busbar has the advantages that the EMI filtering function is integrated while electric energy is transmitted and parasitic inductance is lowered, a filtering effect is achieved, meanwhile, the cost is lowered, and the size is reduced.

The invention provides a practical window type air purifier which comprises a shell, rotating rolls, filter screens, a first dust collector, a second dust collector, a plasma generator and a nanocrystal catalyst net. The interior of the shell is divided into a first cavity, a second cavity and a third cavity through a first separation plate and a second separation plate, wherein the third cavity is located between the first separation plate and the second separation plate. The rotating rolls are arranged in the first cavity and the second cavity respectively, the filter screens are connected end to end, penetrate through the first separation plate and the second separation plate, and are arranged on the rotating rolls in a sleeving mode, and the rotating rolls drive the filter screens to do circulating motion along the first position, the interior of the first cavity, the second position, the interior of the third cavity and the first position in sequence. The first dust collector is arranged in the first cavity, and the second dust collector is arranged in the second cavity. The plasma generator and the nanocrystal catalyst net are arranged in the third cavity. The practical window type air purifier is good in purifying effect, and the filter screens are cleaned and replaced without influencing work.

The invention provides a gas treatment device. The gas treatment device is provided with a cavity defined by a shell and a filtering unit arranged in the cavity. A gas inlet and a gas outlet for gas to enter and exit from a cavity are formed in the two ends of the shell of the device respectively, and a filtering unit is driven to be rotationally separated between the gas inlet and the gas outlet;the cavity is filled with certain treating fluid, and the filtering unit is partially flushed in the treating fluid; a channel for gas to flow through is formed above the liquid level of the treatment liquid; the gas passes through the filtering unit soaked with the treatment liquid in the flowing process; due to the interception of the filtering unit and/or the action of the treatment liquid, harmful substances in the gas are removed. According to the gas treatment device, the service life of the filter material in the gas treatment device can be prolonged, so that the gas treatment and purification cost is reduced.

The invention discloses a PM2.5 type haze-preventing multifunctional headscarf which comprises an elastic cylindrical girdle which is integrally formed. One side of the inner side of the cylindrical girdle is provided with a pocket-shaped structure, and a PM2.5 filtering piece is inserted into a pocket. By means of the arrangement of the cylindrical girdle, one side of the inner side of the cylindrical girdle is provided with the pocket, the size of the pocket is 7-10cm*10-13cm, the pocket is made of cloth the same as that of the cylindrical structure and with the weight of 10-150g/m2, after ultrasonic seam pressing, laser spot welding, elastic sewing and other sewing processes are carried out and the cylindrical pocket is sewn on the inner side for positioning, the headscarf can be formed and be used as a headscarf or a neckerchief or a mouth mask, and the headscarf is multifunctional and very practical. When the face is sleeved with the headscarf, the headscarf can be used as the mouth mask. The haze-preventing multifunctional headscarf is more attractive in appearance, comfortable to wear and particularly suitable for outdoor people groups in haze weather such as outdoor work personnel, office workers, travelers and the like.

The invention discloses an FPGA (Field Programmable Gate Array) based electroencephalogram signal collection system and method. The FPGA based electroencephalogram signal collection system comprises a multichannel signal receiving module, a parallel processing module, a signal filtering module, a peak detection module and a signal extraction module, wherein an output end of the multichannel signal receiving module is connected with an input end of the signal extraction module through the parallel processing module, the signal filtering module and the peak detection module in turn. According to the FPGA based electroencephalogram signal collection system and method, electroencephalogram signals are received through an FPGA based processing platform, the mean filtering and the peak detection are performed through a shifting register, the signal extraction is performed through a storage queue and a counter, and accordingly the filtering effect is achieved through less resources, useful signals are extracted from every channel, the flexibility is high, the high-speed parallel computing can be achieved, a plurality of channels can be processed in parallel, and accordingly the real-time collection and extraction can be achieved so as to perform the downstream module analysis and processing. The FPGA based electroencephalogram signal collection system and method can be widely applied to the signal analysis field.

The invention discloses a system and method for implementing DNS attack resistance based on a network processor. The method includes the following steps: before data enters a secondary server, detecting the number of attack packets of DNS messages with a specific IP and load length within a certain time; and if the number of the messages exceeds a threshold, taking the messages as attack messages,and discarding the attack messages to ensure that the bandwidth is sufficient and the secondary server can receive normal messages. According to the scheme provided by the invention, the surging DNSattack messages are discarded on primary shunting equipment based on the network processor, the line bandwidth can be effectively guaranteed, and the normal operation of networks and the secondary server can be guaranteed.

The invention relates to the technical field of virtual image imaging systems and discloses a virtual image imaging system with an anti-peep film. The system comprises an image source module, a lens in the imaging system, an observer position, a light trajectory, an outgoing light and an anti-peep film. Imaging light emitted by the image source module is reflected by a lens in the imaging system and the light trajectory is imaging light; and the light trajectory is reflected to the observer position by the lens in the imaging system. The image source module includes outgoing light. According to the invention, with the anti-peep film, the image source light is filtered partially by using the film with the anti-peep property, so that the outgoing light direction is controlled and thus the stray light emitted by the image source module is blocked; and thus the direction of the outgoing line of the image source is limited and the outgoing light is filtered. Therefore, special requirementson the incident light, the outgoing line, and the external interference light can be met; and the optical imaging quality of the whole system is improved.