114 results about "Complex filter" patented technology

A cybersecurity system for enhancing detection of cyber threats through use of one or more Large Language Models (LLMs) is described. Herein, the LLMs are configured to generate one or more structured elements that operate as a complex filter for automatically extracting salient data from data received from one or more external sources for training of Artificial Intelligence (AI) models. Additionally, the LLMs are further configured to correlate multiple user credentials associated with different platforms to identify a common user to enhance training of the AI models and anonymize at least personally identifiable information (PII) data prior to training of the AI models.

A technique for creating a GraphQL Application Programing Interface (API) schema is disclosed. The technique includes generating a filter input object for an object defined in a GraphQL API schema. The filter input object provides the ability for a GraphQL API user (i.e., an API developer or an end user) to perform filtering operations in a query operation on schema objects defined in a GraphQL API schema. The filter input object comprises a set of object attributes and a set of custom attributes. The custom attributes provide the ability for an API developer (or an end user) to perform complex filtering operations in a query operation on schema objects defined in a GraphQL API schema. The technique further includes receiving a query operation to be performed and executing the query operation against a backend datasource to obtain a query result. The query result is transmitted to a GraphQL API user.

The invention discloses a target identification method, system and device and a medium, and the method comprises the steps: 1, carrying out the basic feature extraction of an original image, and obtaining a basic feature; 2, performing complex filtering decomposition on the original image to obtain a high-frequency sub-band and a low-frequency sub-band; thirdly, attention enhancement is conducted on the low-frequency sub-bands through the high-frequency sub-bands, and enhanced low-frequency features are obtained; 4, splicing the enhanced low-frequency feature with the basic feature to obtain a first output feature; 5, replacing the original image by using the first output feature, returning to the first step, repeatedly executing the first step to the fourth step for the first time, and so on, when repeatedly executing the nth time, n is equal to 2, 3,..., N-1, correspondingly replacing the (n-1) th output feature by using the nth output feature, and returning to the first step until the Nth output feature is obtained; and 6, carrying out linear processing on the Nth output feature to obtain a target identification result. According to the method, high and low frequency information is extracted through complex filtering decomposition, and a good recognition effect is achieved.

An acoustic wave device includes a silicon single crystal baseplate including a main surface, a piezoelectric layer directly or indirectly on the main surface of the silicon single crystal baseplate, and an IDT electrode on the piezoelectric layer and including electrode fingers. The piezoelectric layer is a lithium niobate layer. In the main surface of the silicon single crystal baseplate, a plane orientation is (111). When Euler angles in the main surface of the silicon single crystal baseplate are (φ, θ, ψ), the ψ in the Euler angles of the silicon single crystal baseplate is about −30 degrees <ψ< about 30 degrees.

The invention relates to the technical field of high-voltage commutation, and discloses a control method and system for a composite LC filter of a high-voltage converter station, and a storage medium. According to the method, on the basis of staggered solid / liquid-filled dielectric plates and series hollow inductors in a sealed oil tank, by obtaining a capacitance / inductance adjusting instruction, the filling and pumping volume and speed of insulating liquid and magnetic liquid are controlled according to the absolute value of an adjusting value, and continuous and accurate adjustment of the filtering frequency and reactive power is achieved. The method comprises multiple optimization: monitoring high fluctuation of liquid, synchronously filling, pumping and radiating, balancing efficiency and energy consumption according to an adjusting frequency adaptive circulation speed, and performing reverse linkage cooperative adjustment on a dielectric medium pump and a magnetic liquid pump; and magnetic liquid leakage and insulation abnormity are treated in stages, so that operation is guaranteed. The method solves a traditional adjustment dead zone, does not need a power electronic device, is low in cost, is small in loss, is adaptive to outdoors, and improves the electric energy quality and equipment safety of a converter station.

The invention relates to the technical field of electronic circuits, in particular to a filter circuit, a voltage filter control circuit, a chip and electronic equipment. The filter circuit comprises a counter, a first data selector, a digital operation circuit and a register, the counter is used for receiving the counting enable signal, outputting a counting mark value to the first data selector, determining a corresponding current logic operation mode according to the current counting mark value, and performing logic operation on the intermediate input parameter according to the current logic operation mode to obtain a first voltage error value after filtering processing; by adopting the filter circuit provided by the invention, required logical operation can be completed by virtue of the first data selector and the digital operation circuit, so that the first voltage error value is output, and the filtered voltage signal is adjusted according to the first voltage error value, so that the set frequency component in the output voltage signal is filtered out; in this way, complex filter coefficients do not need to be configured, a processor with higher computing power does not need to be used, and hardware cost is saved.

The invention relates to a virtual inertia-damping cooperative adaptive control method for a voltage source type direct-driven permanent magnet wind turbine generator. The method comprises the following steps: constructing a voltage source type direct-driven permanent magnet wind turbine grid-connected equivalent model; constructing a wind turbine generator frequency response model based on a dynamic coupling relationship between virtual inertia and virtual damping; collecting a frequency signal of a common connection point of a power grid, and carrying out collaborative optimization processing on the frequency signal by adopting a composite filter to obtain a virtual power increment; the active power reference value is introduced into an active power control loop of the grid-side converter; and controlling the power grid side converter after the additional power reference value is introduced by adopting a rotational inertia and damping coefficient adaptive control method based on a nonlinear function. According to the method, frequency steady-state deviation compensation and dynamic change rate correction can be realized, the frequency stability under wide-range disturbance can be improved through segmented nonlinear adjustment, and the requirements of unit active inertia response and power grid frequency stability are met.

The invention relates to the technical field of defect detection, in particular to a corrugated paper defect detection method and system based on machine vision. The method comprises the following steps: acquiring a corrugated paper image and converting the corrugated paper image into a frequency domain; identifying a periodic texture peak point based on amplitude spectrum angle energy distribution, generating a texture suppression filter, and combining with a multi-scale Gaussian high-pass filter to obtain a composite filter bank; the filter bank is used for filtering the frequency domain signals and performing energy weighted fusion; performing inverse transformation on the fused signal to obtain an enhanced image; and segmenting the enhanced image to obtain candidate defects, and verifying by combining the gradient information of the original image to determine a final defect. According to the scheme, the texture background can be adaptively inhibited, the multi-scale defect is enhanced, the false alarm rate is effectively reduced in combination with gradient check, and the detection accuracy and robustness are improved.

The invention relates to a range extender torsional vibration suppression method and system based on high-order filter active damping, and the method comprises the following steps: comparing the target rotating speed of a motor with the actual rotating speed, and obtaining a motor rotating speed error; the motor rotating speed error is converted into rotating speed output torque through a rotating speed controller; extracting a motor rotating speed fluctuation component through a high-order composite filter according to the actual rotating speed of the motor; obtaining compensation torque according to the motor rotating speed fluctuation component in combination with the proportional gain coefficient; superposing the compensation torque into the rotating speed output torque, and performing negative feedback control on the rotating speed of the motor to obtain a final motor torque instruction; and the rotating speed of the motor is controlled according to the final motor torque instruction, and torsional vibration of the range extender is restrained. Compared with the prior art, the torsional vibration of the range extender can be effectively inhibited, the rotating speed fluctuation is reduced, and the NVH performance and the operation stability of the range extender are improved.

A compound filter device includes a piezoelectric substrate, a first filter that is a band pass filter and includes a longitudinally coupled resonator acoustic wave filter on the piezoelectric substrate, and a second filter including at least one resonator, and an inductor connected to a ground potential. In a plan view, the longitudinally coupled resonator acoustic wave filter and the inductor overlap to define an overlapping portion, and a direction in which current flows through the longitudinally coupled resonator acoustic wave filter and a direction in which current flows through the inductor are the same in the overlapping portion.

The present invention provides a transceiver circuit, which includes a receiving circuit and a digital circuit, and the receiving circuit includes a first mixer, a second mixer, a bias voltage circuit, a complex filter and an ADC. In the operation of the transceiver circuit, the digital circuit controls the bias voltage circuit to sequentially switch the first bias voltage to a plurality of first bias values, and the receiving circuit generates a plurality of first digital signals respectively corresponding to the plurality of first bias values, wherein the plurality of first digital signals are used to calculate a plurality of first quality parameters respectively corresponding to the first bias values. The digital circuit controls the bias voltage circuit so that the first bias voltage has the first bias value corresponding to an optimal quality parameter, wherein the optimal quality parameter is determined according to the plurality of first quality parameters.

The application discloses a novel low-power high-image-rejection active CMOS complex filter circuit, comprising a notch filter circuit, a biquadratic low-pass filter circuit, a linear frequency shift circuit, an I-channel differential input voltage end, an I-channel differential output end, a Q-channel differential input voltage end and a Q-channel differential output end, and the complex notch filter technology is introduced on the basis of the complex band-pass filter, so that the effects of notch filtering at the image signal frequency point and band-pass filtering at the useful signal frequency point are realized; compared with the existing complex band-pass filter, the application has the frequency selection ability at the useful signal frequency point and can have a good image rejection effect under a single-stage circuit structure without increasing the circuit area and power consumption, so that the multi-stage cascade form is avoided, and the total power consumption and area loss of the circuit are greatly reduced, and the quadrature mismatch problem is also avoided. In addition, the complex filter can also be used in other low intermediate frequency receivers, and is suitable for a wide range of applications.

The invention discloses a hybrid echo cancellation method and system based on depth filtering and frequency band weighted loss, and the method comprises the steps: carrying out the preprocessing of a microphone signal and a reference signal through a low-complexity linear echo cancellation preprocessing module, and outputting an error signal; the three paths of input are sent to a hybrid conditional filter network (HHF-Net); complex domain time-frequency features are extracted through an encoder, and a complex time-frequency spectrum is recovered through a decoder after bottleneck layer modeling; a depth filtering module learns a complex filter coefficient for each time frequency unit, and suppresses echo through causal two-dimensional convolution; a mixed loss function training model of frequency band weighted amplitude loss and scale invariant signal-to-noise ratio (SI-SNR) loss is adopted. The problems of target voice information loss, poor output voice listening feeling and overlarge model parameter quantity in a double-talk scene are solved, an average opinion score (MOS) index is remarkably improved, and echo components are effectively inhibited while voice distortion is reduced.

The embodiment of the application provides a direct current offset correction method and a correction system, the method comprising: obtaining a first direct current output offset voltage of a complex filter to be corrected; determining a relationship between a direct current input voltage and the direct current output offset voltage under an ideal filter based on a preset virtual ground characteristic of an operational amplifier, according to an input current of an input point of the operational amplifier and a preset resistance of the complex filter; determining a to-be-corrected current according to the relationship between the direct current input voltage and the direct current output offset voltage under the ideal filter and the first direct current output offset voltage, and working under a normal working condition by using the to-be-corrected current; and based on the preset virtual ground characteristic of the operational amplifier, performing one or more iteration calculations on the input current of the input point of the operational amplifier, the preset resistance of the complex filter and the to-be-corrected current, so that a second direct current offset voltage is a preset value, the IQ structure of the complex filter is not damaged, and the I / Q two paths can be simultaneously corrected, and one-step correction is completed.

The application discloses a kind of polyphase interpolation and digital up-conversion collaborative stream processing method and architecture, method includes: obtaining input signal and prototype filter;With the commutability of complex multiplication and convolution operation, mix frequency converter is from the high-speed domain after interpolation to the low-speed domain before interpolation;Under the condition that interpolation coefficient is equal to polyphase factor, prototype filter is decomposed into phase polyphase structure, and polyphase complex filter coefficient is defined;In the sampling rate rate domain, input signal is multiplied with low-frequency fundamental signal to obtain pre-mixing signal;Pre-mixing signal is sent into polyphase complex interpolation filter group and is carried out interpolation filtering processing, each phase filter coefficient is the complex coefficient after offline calculation and quantization, and the sample point after each phase interpolation and up-conversion is output;Synthetic sampling rate data stream.The application prepositions mix frequency converter to low-speed domain, and the number of multiplier is reduced, power consumption and timing pressure are reduced.

The invention discloses a robust coupling matrix reconfiguration optimization method based on an inverse eigenvalue problem. The method comprises the following steps of: 1, improving an optimization model based on the inverse eigenvalue problem; a second step, improvement of an optimized Levenberg-Marquardt method is carried out, and the Levenberg-Marquardt method is carried out; step 3, an optimization method based on q reduction; the method has the beneficial effects that the method can be suitable for a large-scale and more complex filter topological structure transformation problem, and the robustness of the optimization process is enhanced while the optimization efficiency is improved. Compared with the existing method in a real application example, the research provided by the invention has extremely high optimization success rate and good reliability. Therefore, an efficient comprehensive means is provided for the design of the microwave filter, the efficiency is improved for the subsequent production and debugging of the filter, and a large amount of time is saved.

The application discloses a kind of membrane preparation waste liquid recovery processing equipment, it is related to membrane preparation wastewater treatment technology, including processing box body, and the liquid discharge notch being opened in the right side upper portion of processing box body;Further include: the left side upper portion of processing box body is provided with initial filter component, and initial filter component contains initial filter box body, and the liquid outlet notch being opened in the right side upper portion of initial filter box body is correspondingly distributed in the left side upper portion of processing box body;Wherein, the right side outer wall of initial filter box body is rotatably provided with follow-up guide pulley by bearing, and follow-up guide pulley is arranged below liquid outlet notch;The inside of processing box body is provided with impurity removal component, and impurity removal component contains filter screen plate.This membrane preparation waste liquid recovery processing equipment, by initial filter box body to waste liquid precipitation, and discharge to processing box body inside carries out filtration treatment, and push the sundries in waste liquid to processing box body outside, avoid causing blockage at the same time, complex filter component carries out depth filtration, and then realize the recovery processing of membrane preparation waste liquid.

Provided is a composite filter device capable of increasing the out-of-band attenuation of a band-pass filter. This composite filter device is provided with: a piezoelectric substrate (2); a first filter as a band-pass filter, the first filter including a longitudinally coupled resonator-type elastic wave filter (6) formed on the piezoelectric substrate (2); a second filter including at least one resonator and an inductor (L4) connected to a reference potential; and a reference potential wiring (9) which is provided on the piezoelectric substrate (2), is connected to a reference potential, has a substantially annular portion (9a) having an annular shape via a gap, and surrounds the longitudinally coupled resonator-type elastic wave filter (6) in the substantially annular portion (9a). The substantially annular portion (9a) of the reference potential wiring (9) has a first end portion (9b) and a second end portion (9c) that face each other with a gap therebetween, and a reference potential connection portion (9d) that extends from the first end portion (9b) and connects the longitudinally coupled resonator-type elastic wave filter (6) to a reference potential. The inductor (L4) includes one parallel wiring section (La) extending parallel to the reference potential connection section (9d) in plan view, or two or more parallel wiring sections (La) extending parallel to the reference potential connection section (9d) in plan view, arranged in a direction orthogonal to the direction in which the reference potential connection section (9d) extends, and having the same current flow direction. When a region including a parallel wiring portion (La) located closest to one side in a direction orthogonal to a direction in which the parallel wiring portions (La) extend to a parallel wiring portion (La) located closest to the other side in the direction is defined as a parallel wiring portion region (L), the parallel wiring portion region (L) and the reference potential connection portion (9d) overlap each other in a plan view. The direction (arrow B) of the current flowing through the parallel wiring section (La) and the direction (arrow A) of the current flowing through the reference potential connection section (9d) are the same.

The application relates to the technical field of semiconductor manufacturing, and discloses a wafer defect detection method, a wafer defect detection device and a medium. The method comprises the following steps: performing image processing on a target wafer image of a wafer object to be detected to obtain a plurality of local spectrum regions; performing complex filtering processing on the local spectrum regions in a plurality of scales and a plurality of directions to obtain response information of each local spectrum region under different scales and different directions; determining a phase consistency residual graph, a frequency band leakage residual graph and a direction offset residual graph based on phase responses and energy responses in the response information, a pre-constructed spectrum phase reference field, a main frequency band and a main direction; performing multi-scale residual back projection processing on the target wafer image to obtain a multi-scale residual back projection graph; generating a defect saliency graph based on any one or several of the phase consistency residual graph, the frequency band leakage residual graph, the direction offset residual graph and the multi-scale residual back projection graph; and performing defect detection based on the defect saliency graph to obtain a target detection result.

The invention provides a low-frequency oscillation data filtering method and device for a thermal power generating unit, and the method comprises the steps: carrying out the signal conversion of original synchronous vector measurement data or a power signal measured by the unit through a preset sliding window data region, and generating symmetric signal data; performing data preprocessing on the symmetrical signal data to generate preprocessed low-frequency oscillation signal data; filtering and denoising processing is carried out on the preprocessed low-frequency oscillation signal data through a pre-constructed composite filter to generate low-frequency filtering signal data, and the composite filter is constructed based on morphology and can detect low-frequency oscillation information in real time; the low-frequency oscillation data and the normal load fluctuation are distinguished and discriminated, the low-frequency oscillation data are filtered, various noise signals are effectively eliminated, the application range is wide, and the filtering accuracy is improved; the calculation amount is controlled, and the stability and reliability of the calculation result are improved, so that an effective data basis is provided for early warning identification of subsequent low-frequency oscillation.

The utility model discloses a filter for high-frequency band communication equipment, comprising a filter for high-frequency band communication equipment, both left and right ends of the filter for high-frequency band communication equipment are fixedly connected with connection terminals, and the lower end of the filter for high-frequency band communication equipment is connected with a mounting component. The key points of the technical scheme are that, by setting an assembling component, when assembling two or more filters for high-frequency band communication equipment, an insert block is inserted into a corresponding assembling groove, which plays a role in preliminary positioning and connection of the two or more filters for high-frequency band communication equipment, and then a knob is turned, and under the action of a screw rod and a connecting rod, a limiting column is driven to penetrate the insert block, so that the limiting column is inserted into the limiting groove, so that the two or more filters for high-frequency band communication equipment can be further fixed together, thereby completing the modular assembly of the two or more filters for high-frequency band communication equipment, thereby facilitating the formation of a larger capacity and more complex filtering system.

The invention relates to the technical field of water sample filtering devices, and discloses a portable water sample sediment screening and filtering device and a using method.The device comprises a screening filter, a water inlet is formed in the upper portion of the screening filter, a first thread is arranged in the water inlet and used for being connected with an external water bucket, and a water outlet is formed in the lower portion of the screening filter; a second thread is arranged on the outer surface of the water outlet; a cavity is formed in the screening filter, and a plurality of layers of filter plates or filter screens are arranged in the cavity; an air inlet is formed in the upper side of the screening filter and can be externally connected with an air pump. By arranging the silt screening filter and the filtering barrel which are detachably connected, a filtered water body is placed on the upper portion, solid-liquid separation and glue-liquid separation are achieved through screening of different particle sizes and pressurization flow increasing, meanwhile, the device provides multiple use choices, natural water body sampling, primary filtering and fine filtering are completed in a one-stop mode, and the device is high in practicability and high in practicability. Meanwhile, the problems of complex assembly, complex filter membrane replacement and unstable pressure control can be solved, and the device is suitable for daily, field or emergency scenes.

A composite filter component includes a filter causing a signal of a band AL reception band to pass through, a filter causing a signal of a band BL reception band to pass through, a filter causing a signal of a band AM reception band configured to be simultaneously received with a signal of the band AL to pass through, a filter causing a signal of a band BM reception band configured to be simultaneously received with a signal of the band BL to pass through.

The present application belongs to the technical field of intelligent state evaluation of generator set operation, and discloses a natural gas generator set operation intelligent state evaluation method and system, which comprises the following steps: obtaining multi-physical field operation data, reconstructing the multi-physical field operation data based on different time scales to obtain a physical perception state point cloud set; performing complex filtering on each time scale point cloud, and performing multi-scale unit operation state topology evolution analysis on the filtered complex sequence; inputting the topology feature vectors into a topology random forest model for training, and performing joint reasoning to output a fault mode posterior distribution; calculating a unit health index, and combining the unit health index with a dynamic early warning threshold to realize natural gas generator set operation state evaluation. The present application can deeply mine the dynamic evolution law of different physical processes such as combustion, machinery, heat and degradation, and effectively capture early weak faults and multi-field coupling abnormalities that are difficult to identify by traditional methods.

The invention discloses a mariculture tail water filtering treatment device and a using method thereof, and relates to the technical field of aquaculture tail water treatment.The mariculture tail water filtering treatment device comprises a supporting frame, and a tail water treatment assembly is arranged in the supporting frame; when the device is used, a hydraulic rod is started, a moving plate is pushed to move upwards, an adjusting gear is meshed with a middle annular gear, then a forward and reverse motor is started, a rotating rod and the adjusting gear are driven to rotate, then the middle annular gear and a second filter screen are driven to rotate, and the second filter screen and a first filter screen are staggered in position; then a hydraulic rod pulls a moving plate to move downwards, so that an adjusting gear is meshed with a lower annular gear, the output end of a forward and reverse motor rotates reversely, the adjusting gear is driven to rotate reversely, the lower annular gear and a third filter screen are driven to rotate reversely, the third filter screen and a second filter screen are staggered in position, and a complex filter layer is formed; multi-angle interception is achieved, and the filtering effect is improved.

The invention belongs to the technical field of power system synchronization, and particularly relates to a three-phase phase-locked loop control method and device. The method comprises the following steps: acquiring a q-axis power grid voltage sampling value of a three-phase power grid voltage sampling value under a two-phase rotating coordinate system; inputting the q-axis power grid voltage sampling value into a complex coefficient filtering sliding mode observer, extracting alternating current frequency multiplication disturbance brought by the distorted power grid voltage, and obtaining a q-axis voltage estimated value, a direct current estimated value in the alternating current frequency multiplication disturbance and a total alternating current estimated value in the alternating current frequency multiplication disturbance; the complex coefficient filtering sliding-mode observer is obtained by connecting a complex number filtering item of a complex coefficient filter in parallel in the sliding-mode observer; and calculating a phase angle estimation value of the three-phase phase-locked loop after feedback compensation based on the q-axis voltage estimation value, the direct current quantity estimation value in the alternating current frequency multiplication disturbance, the total alternating current quantity estimation value in the alternating current frequency multiplication disturbance and the power grid phase voltage amplitude. The control efficiency and accuracy of the phase-locked loop are improved, and the method has good stability and robustness.

Phase and amplitude error correction in a transmission circuit is provided. The transmission circuit includes a transceiver circuit, a power management integrated circuit (PMIC), and a power amplifier circuit(s). The transceiver circuit generates a radio frequency (RF) signal(s) from an input vector, the PMIC generates a modulated voltage, and the power amplifier circuit(s) amplifies the RF signal(s) based on the modulated voltage. In embodiments disclosed herein, the transceiver circuit is configured to equalize the input vector using multiple complex filters to thereby correct amplitude-amplitude (AM-AM) and amplitude-phase (AM-PM) errors. As a result, it is possible to reduce undesired instantaneous excessive compression and / or spectrum regrowth to thereby improve efficiency and linearity of the power amplifier circuit(s) across the modulation bandwidth.

A composite filter component includes a filter causing a signal of a band AL reception band to pass through, a filter causing a signal of a band BL reception band to pass through, a filter causing a signal of a band AM reception band configured to be simultaneously received with a signal of the band AL to pass through, a filter causing a signal of a band BM reception band configured to be simultaneously received with a signal of the band BL to pass through.

The utility model relates to sewage treatment technical field, concretely is a kind of sedimentation tank with anti-blocking function, it includes pool body and central tube, the position of central tube near bottom is equipped with aeration unit, the aeration unit includes aeration assembly and aeration pipe, aeration pipe is arranged between aeration assembly and central tube, and the aeration gas stream released when aeration assembly periodic operation enters central tube to carry out water flow disturbance by aeration pipe;That is, the disturbance water flow formed by aeration gas stream in central tube solves the problem of central tube blockage, without manual cleaning, without setting complex filter device, in addition, the aeration unit of the scheme only as auxiliary flushing unit periodic operation, therefore, the influence to the sedimentation environment of sedimentation tank is less;Visible, the sedimentation tank of the structure of the scheme has the advantages such as high operating efficiency and long service life, and maintenance cost is also reduced and operation process is simplified, has wide application prospect and economic benefits.