1627 results about "Elimination method" patented technology

A signal processing device includes an adaptive filter (5), a noise estimation circuit (10), and a double talk detection circuit (81) and operates so that the double talk detection circuit (81) detects a double talk by using the estimated noise obtained by the noise estimation circuit (10). The signal processing device further includes noise estimation means and detects a double talk by using an estimated noise, a microphone signal, and pseudo-echo. An echo removal method and device detect a double talk by using a reliability coefficient expressed as continuous values between 0 and 1. By using continuous values instead of two values 0 and 1, it is possible to reduce the affect of a detection error.

An Adaptive Vector Cancellation method which uses time domain data for an instrument connection to estimate magnitude, phase, and time position of a signal response such as NEXT or Return Loss associated with the connection. Based on the estimate of the amplitude and time of the connection response, a suitable full-bandwidth frequency response that corresponds to a point source of NEXT or Return Loss is determined. This calculated connector response is then scaled to an appropriate magnitude, phase and time shifted to the estimated position of the actual connection. The scaled / shifted response is then vectorially combined with the measured sweep data to suitably cancel the connection contribution to NEXT and / or Return Loss. Thus, the amount of NEXT or return loss existing in the user's patch cord is preserved, while the NEXT or return loss due to the instrument connection is suitably suppressed. Correction is done in the frequency domain, over the full bandwidth of the measured data.

The invention provides an adaptive echo eliminator and the echo eliminating method thereof; wherein the device consists essentially of a voice state detector, an NLMS (energy normalized least mean square error) controller and a sliding window FIR filter. The method mainly includes the following steps: sampling both a far-end voice signal and a near-end voice signal, and confirming the speaking status information of the current network according to the estimated values of the short-time energy of the sampled far-end speech signal sample and the near-end speech signal sample. Then, the coefficient of a sliding window FIR filter is configured according to the speaking status information of the current network, and the sliding window FIR filter step-by-step filters the near-end speech signal and the far-end speech signal filled into the buffer area according to the mobile length set by the configured coefficient. Utilizing the invention, the echo of the digital hands-free speaking system can be effectively eliminated, thereby effectively eliminating the echo of the digital communication system based on the embedded system.

The invention discloses a multi-target detection method based on short-time Fourier transform and fractional Fourier transform, which belongs to the technical field of the radar target detection. The method comprises the following steps that the short-time Fourier transform is firstly used for conducting the primary detection on a signal, then a binaryzation method is used for processing a primary detection result, phase position of the signal is kept in the processing, the fractional Fourier transform is used for detecting a signal after being restored by the short-time Fourier transform, by adopting multiple methods for combined processing, advantages of overcoming phenomenon that a strong signal side lobe presses a weak signal main lobe, improving the signal-to-noise ratio of the signal to be detected, and solving the problem of the large false alarm possibility which is caused by adopting traditional method to detect the signal at the low signal-to-noise ratio can be realized; and meanwhile, an image contrast method and a gradual elimination method are adopted, multiple strong signals and weak signals with different or identical frequency modulation rates can be detected by utilizing the space and power strength information of the signal, so that the detection probability and the calculation efficiency can be further improved, easiness in project realization is realized, and the method is worth of being adopted and popularized.

The invention discloses a method, a device and a system for eliminating the interference among cellular base stations. The method comprises the following steps that: the cellular base station sends use information of time-frequency resources of a cell to a neighbor cell; and a base station of the neighbor cell preferentially selects the resource which does not conflict with the resource indicated by the use information of the time-frequency resources to allocate to users of the cell according to the use information of the time-frequency resources, wherein the use information of the time-frequency resources comprises HII or / and OI information. By the method, the device and the system, the cellar base station can try best to avoid using the resource which conflicts with the resource indicated by the use information of the time-frequency resources when allocating the time-frequency resources for the users of the cell according to the use information of the time-frequency resources, thereby eliminating the interference among the cells.

The invention relates to a directional fracturing method in the coal mine and a fracturing permeability improvement outburst elimination device to ensure the coal-bed gas to release rapidly and continually in the coal mine. The method comprises the following steps: fracturing and drilling a bore on a preparing working face along the dip direction and strike direction of a coal bed, fixing a fracturing hole packer with an outer diameter matching with the pore diameter of a fracturing drilling bore into the fracturing drilling bore; connecting a fluid reservoir with a sand mixing machine, connecting the sand mixing machine with a fracturing pump package, and then connecting the fracturing pump package with the fracturing drilling bore; pumping formation fracturing fluid and proppant into the fracturing drilling bore to fracture the formation and sealing the fracturing drilling at above formation fracturing pressure, and completing directional fracturing permeability improvement outburst elimination in the coal mine, thus ensuring that the coal-bed gas discharges rapidly and continually relatively and solving the problems that drainage in low air permeability coal bed can only influence a limited range and the drainage attenuation period is short, improving the drainage rate by over 50% on primary base, decreasing the coal body dynamic phenomenon after fracturing and reginal stress influenced by fracturing, and having a significant effect for eliminating outburst.

This invention discloses a microphone echo elimination device and method, which eliminates echo between microphone and sound circuit, wherein, the device comprises long frame adjust module to combine one self adaptive filter parameter data frame for self adapting filter.

An interference signal cancellation device comprises a signal splitter, a delay element and a signal combiner. The signal splitter distributes a disturbed signal to a first signal path and a second signal path. The delay element is situated in at least one of the first signal path and the second signal path for introducing a relative delay between a first signal in the first signal path and a second signal in the second signal path. The signal combiner combines the first signal and the second signal. An interference signal within the disturbed signal is substantially reduced within the signal combiner. A method for interference signal cancellation is also proposed. Furthermore, a computer program product with instructions for the manufacture and a computer program product enabling a processor to carry out the method for interference signal cancellation are also proposed.

Disclosed herein are a number of example embodiments that employ controllable delays between successive ladar pulses in order to discriminate between “own” ladar pulse reflections and “interfering” ladar pulses reflections by a receiver. Example embodiments include designs where a sparse delay sum circuit is used at the receiver and where a funnel filter is used at the receiver. Also, disclosed are techniques for selecting codes to use for the controllable delays as well as techniques for identifying and tracking interfering ladar pulses and their corresponding delay codes. The use of a ladar system with pulse deconfliction is also disclosed as part of an optical data communication system.

The invention provides a ghost shadow elimination method and device and a displayer. The method comprises the following steps: in the image display process, carrying out detection on sub-pixels at an interval of P frames and in 1 frame time to obtain aging information of the sub-pixels, wherein the P is a positive integer larger than 1; obtaining compensation information of the sub-pixels according to the aging information; and carrying out compensation on the sub-pixels according to the compensation information so as to reduce gray scale attenuation of the sub-pixels. According to the ghost shadow elimination method and device and the displayer, in the image display process, it takes 1 frame time to detect the sub-pixels until the aging information of all the sub-pixels is obtained; and when the frame corresponding to the image displays, the ghost shadow elimination device can obtain compensation information through operation and carry out compensation operation, such that the problem of influencing client experience caused by the fact that the ghost shadow can be eliminated under a standby state of a user can be prevented, and ghost shadow elimination can be realized.

The invention proposes a steelmaking-continuous casting scheduling method utilizing a priority policy hybrid genetic algorithm. The method comprises the following steps: establishing a production scheduling plan target function; establishing a constraint condition set; performing iterative calculation on the target function by utilizing the priority policy hybrid genetic algorithm; and calculating decision variables. The calculation of the decision variables specifically comprises the steps of performing model initialization; calculating a feasible solution: designing a segmented combined real number code composed of casting time information of a continuous casting machine and information of a heat machining device, randomly generating operation time according to a distribution law, and obtaining a time conflict-free scheduling plan by backward inference calculation and conflict elimination methods; and performing population genetic optimization: quantitatively describing a matching relationship among machining devices in reality by using processing weight assignment of a task executable device, and introducing the matching relationship to genetic operation in the form of a device selection priority policy to perform population evolution. The method can solve the problem of uncertainty of device selection and operation time in production to obtain an optimized executable production scheduling plan.

The invention discloses a laser scanning type bulk material flow detection and distribution error elimination method. Collecting point data and belt speed data of frames of section contours of a material stream are obtained; three-dimensional coordinates are built according to collecting point data and belt speed data; the material flow between adjacent frames is obtained through a triangulation network construction method, and the instantaneous flow rate of a unit time is obtained; the material stream sectional area is worked out by calculating the area difference between a material and a no-load belt scanned by a laser scanner, the area R defined by the straight line where the starting angle of each frame scanned by the laser scanner is located, the straight line where the termination angle of the frame scanned by the laser scanner is located and the corresponding material stream section contour in the material conveying process is calculated, and the material stream sectional area of each frame is obtained; the sectional area distribution error correction factor of the kth frame of the material stream is obtained; the corrected material stream sectional area is calculated. The laser scanning type bulk material flow detection and distribution error elimination method is simple in structure, high in automation degree and high in real time performance, and material distribution measurement is not influenced by dust, the weather, light and the like in the external environment.

The invention discloses a concurrent hierarchy type replicated data eliminating method and a system. The method comprises the following steps: an input device receives data input externally and puts the data into a shared buffer queue; a plurality of blocking devices concurrently acquire the data from the buffer queue and carry out blocking, and inputs the blocks to a plurality of coarse grain duplication removers to carry out coarse grain duplication removal; and the coarse grain duplication removers carry out coarse grain duplication removal and judge whether the data blocks are duplicated, and if so, the index information of the duplicated data blocks is written into a memory by using a data read-write subsystem; and else, fine grain duplication removers carry out the fine grain duplication removal on the non-duplicated data blocks, and store the data blocks subject to duplication removal and the index information thereof into the memory through the data read-write subsystem.

The invention discloses a course-drifting-error elimination method of indoor inertial navigation positioning, which is realized on the basis of an inertial measurement unit. The inertial measurement unit comprises a triaxial accelerometer, a triaxial magnetometer and a triaxial gyroscope. The course-drifting-error elimination method comprises the following steps: calculating an attitude-quaternion initial value by the triaxial accelerometer and the triaxial magnetometer in advance; in the process of indoor inertial navigation positioning, firstly reading the angular velocity (omega x, omega y and omega z) by the triaxial gyroscope to judge that whether the inertial measurement unit is in a motion state or not, if so, combining with the angular velocity (omega x, omega y and omega z), calculating real-time attitude-quaternion Q (q0, q1, q2 and q3) by a quaternion differential equation (shown in the specification), and if not, maintaining that the current attitude quaternion is constant; and finally, solving a course angle and an attitude angle of the inertial measurement unit by the real-time attitude quaternion. The course-drifting-error elimination method disclosed by the invention has the advantages that the course drifting error caused by inoperation of the gyroscope when in a static state can be effectively solved, so that the accuracy of an indoor pedestrian inertial navigation positioning system is improved.

The invention discloses a malicious encrypted flow feature analysis method, which belongs to the crossing field of network security and machine learning, and is used for analyzing the HTTPS flow and detecting the malicious threats in the HTTPS flow. The method comprises the following steps of modeling the flow data by taking a connection quaternion as a data structure, analyzing the encrypted flowfrom four levels by taking the connection quaternion as a unit, and extracting the flow-level features, TLS handshake features, X.509 certificate features and context features of the connection quaternion to obtain an initial feature set, adopting a recursive feature elimination method based on a decision tree to screen the initial feature set to obtain an optimal feature set used for the machinelearning model training to thereby obtain a malicious encrypted flow detection model.

The invention discloses an eliminator of a self-interference signal, which comprises a dephasing attenuation processing module and a signal elimination processing module, wherein the dephasing attenuation processing module receives a first signal from the outside to carry out attenuation and dephasing processing so acquire an estimated self-interference signal, and the signal elimination processing module receives a second signal from the outside and the estimated self-interference signal from the dephasing attenuation processing module and eliminates the estimated self-interfering signal in the second signal. The invention also discloses an elimination method of the self-interference signal, which comprises the following steps: first, the attenuation and dephasing processing is carried out to a sent signal to obtain the estimated self-interference signal; and second, the estimated self-interference signal is eliminated in the received signal. In addition, the invention also discloses an RFID read-write counter. The eliminator of the self-interference signal acquires the estimated self-interference signal and eliminates the estimated self-interference signal by the attenuation and dephasing processing of the sent signal so as to reduce the influence of the self-interference signal on receiving sensitivity.

The invention discloses a method and a device for eliminating echo. The method comprises the steps of: determining the state of each subband adaptive filter respectively according to the cross correlation coefficient of an input signal on the near end of each subband and an echo estimation signal; when one end of the subband adaptive filter is in a speaking state, replacing the residual signal ofthe subband adaptive filter with comfortable noise of the subband, and outputting the replaced signal; and when both ends of the subband adaptive filter are in the speaking state, outputting the residual signal of the subband adaptive filter. In the invention, the signal processing characteristic of the subband can be fully utilized so that the residual echo can be suppressed more effectively. Inaddition, the suppression on the residual echo while both ends are in the speaking state and the protection on the voice of a person speaking on one end are enhanced, and the integral effect and the fluency of the system are improved.

The present invention is directed to a system and method for cross-talk cancellation for multi-lane fluorescence detectors. The invention may be implemented in accordance with a variety of systems, including systems for multi-capillary electrophoresis. The present invention is based on a special calibration procedure for determination of a channel cross-talk matrix and enables an accurate separation of the fluorescence emitted from individual capillary lanes. The proposed method for cross-talk calibration and removal is very useful for design and development of multi-lane single photon counting detection systems.

The invention discloses an inverse kinematics solution method for a six-degree-of-freedom serial robot. The inverse kinematics solution method comprises the steps of: establishing a connecting rod coordinate system and setting variables theta 1, theta 2, theta 3, theta 4, theta 5 and theta 6; setting an initial configuration; solving theta 4, theta 5 and theta 6 by utilizing a geometric method; and eliminating theta 1, theta 2 and theta 3 by utilizing an algebra elimination method and introducing a tabu search algorithm when solving a non-orthogonal spheroid or the terminal structure of the non-orthogonal spheroid, thereby solving out corresponding numerical solutions. The inverse kinematics solution method is smart in conception and utilizes the geometric method and the algebra elimination method for comprehensive solution, thereby avoiding the problem that the rank of an equation determinant of coefficient is smaller than order caused by arbitrary establishing of equations and correctly obtaining the analytic solutions of six axes efficiently; and for complex-structure trigonometric function relationship, a linear equation in two unknowns can be effectively transformed to a linear equation with one unknown by the elimination method in the use of the geometric method, and therefore a unique corresponding analytic solution is obtained.

The invention discloses an improved eliminating method of tapered beam CT reconstruction image annular false shade, comprising the steps as follows: the invention changes the annular false shade of reading CT reconstruction image into a straight line through a method of coordinate change, then takes a one-dimension filter parallel with the false shade as a mask to search a middle image regularly line by line and acquire sample space, at the same time calculates out the variance about the pixel value of each sample space, acknowledges the false shade according to whether the variance is less than the preset valve value, substitutes the pixel value of each sample space with the average pixel value between the point and two upper and lower false shades in the ordinate axis direction in order to eliminate the annular false shade, and finally changes the middle image free from the false shade to be under the original frame of axes to gain a corrected image.

The invention discloses a display device, which comprises scanning wires, data wires, pixel transistors, pixel electrodes, a grid driver, a source driver and a discharge circuit. The data wires and the scanning wires are mutually crossed. Each pixel transistor is electrically coupled with the corresponding scanning wire and the corresponding data wire respectively, and each pixel electrode is electrically coupled with the corresponding pixel transistor. The grid driver is electrically coupled with the scanning wire, and the source driver is coupled with the data wire. The discharge circuit is electrically coupled with the grid driver and the data wire and is started to control the grid driver to simultaneously conduct the pixel transistors when the display device is closed, and the pixel electrode is electrically coupled with a reference voltage through the data wire and the discharge circuit. The invention also discloses a ghost eliminating method corresponding to the display device.

A block-based statistical timing analysis technique is provided in which the delay and arrival times in the circuit are modeled as random variables. The arrival times are modeled as Cumulative Probability Distribution Functions (CDFs) and the gate delays are modeled as Probability Density Functions (PDFs). This leads to efficient expressions for both max and addition operations, the two key functions in both regular and statistical timing analysis. Although the proposed approach can handle any form of the CDF, the CDFs may also be modeled as piecewise linear for computational efficiency. The dependency caused by reconvergent fanout is addressed, which is a necessary first step in a statistical STA framework. Reconvergent fanouts are efficiently handled by a common mode removal approach using statistical “subtraction.”

Provided are an echo elimination method and device. The method includes: estimating an echo path characteristic parameter of an echo signal; taking a source signal of the echo signal as a reference signal, generating an echo estimation signal according to the echo path characteristic parameter; and subtracting the echo estimation signal from a to-be-processed speech signal. The present invention solves the problem in the related art that self-adaptation cannot be achieved when a returned near-end audio is suppressed, thus facilitating the enhancement of the speech quality of a conference and the improvement of user experience.

The invention discloses a multi-wavelength excitation-based fluorescence elimination method for Raman spectrum, which relates to a method of chemical analysis and photoelectric signal processing and comprises the steps of: sequentially exciting mixed spectra consisting of fluorescence and Raman light by irradiating a plurality of similar wavelength lasers sequentially generated by a laser source to the same measured sample; when a spectrograph acquires various mixed spectrum signals, aligning the mixed spectra, and normalizing and correcting the amplitude of the spectrum signals through a full spectrum integral value to obtain spectra of which the X-coordinates are aligned and the amplitude of the Y-coordinates is corrected; evaluating a difference value between each two mixed spectra, wherein the difference value is a differential value of a fluorescence signal; calculating an inverse difference of the differential value, wherein the inverse difference is divided by a differential step to obtain the sum of a fluorescence background value and a constant; and finally, deducting the fluorescence background value from the mixed spectra to separate a pure Raman spectrum so as to achieve the aim of fluorescence elimination of the Raman spectrum. The method is reasonable, can eliminate background fluorescence effectively, has low cost and convenient use, and is easy to popularize and use.

The invention discloses an automated container terminal with multi-automatically guided vehicle path conflict elimination method. The method includes the following steps that: step 1, the path features of the paths of automatically guided vehicles are set; step 2, the paths of the automatically guided vehicles are discretized into feature points and feature directions, wherein the feature points are a limited number of points selected from path trajectories, and the feature directions are the directions of the feature points; step 3, the paths of automatically guided vehicles are dynamically divided, and the feature point set of the paths is divided into four subsets according to a driving sequence, namely, a passed point subset, an occupied point subset, an application point subset and a detection point subset; step 4, feature point conflicts are detected according to an oriented bounding box method; step 5, path conflicts are predicted, and when path conflicts possibly occur, a part of the paths are adjusted, so that the path conflicts can be avoided; step 6, when new automatically guided vehicle paths are generated, and the step 1 and the step 2 are executed for the new automatically guided vehicle paths; and step 7, the step 3 to the step 5 are executed repeatedly according to determined time intervals until the all the automatically guided vehicles arrive at end points and do not run.

The invention relates to an echo canceller, an echo cancellation method and the double-end talking detection system thereof, wherein, the echo canceller decodes a data stream from the network end into a far-end voice signal and extracts a short-time excitation signal as well as a linear prediction coding coefficient by utilizing a linear prediction decoder. Based on the linear prediction coding coefficient, the echo canceller carries out a decorrelation process to a residual signal by a decorrelation filter, and executes a normalized cross correlation process to the short-time excitation signal and the decorrelation residual signal by utilizing the double-end talking detector to generate the normalized cross correlation detection variable, hence, the echo canceller detects the existence of the double-end talking and then further controls the renewal of the self-adaptive filter. The invention is capable of detecting the existence of the double-end talking by the decorrelation process as well as the normalized cross correlation process to the far-end voice signal and the residual signal, thus obviously decreasing the calculation complexity of the double-end talking detection and the storage space consumption.

The invention provides an image display system, not only discloses a method for collecting test data but also discloses various algorithms for eliminating the defect of cloud pattern; the invention does not need to change the structure of pixel and also large storage space is not needed; while the cloud pattern is eliminated, the algorithms disclosed by the invention can carry out dynamic adjustment for gamma parameters, white point setting and peak brightness according to the requirements of different users or different using environments and the difference from the traditional technique is that adjustment is needed to be carried out for the parameters by extra processes.

The invention discloses a novel OFDM signal channel estimation combination ICI self elimination method. The sending end pilot frequency design adopts a cluster type pilot frequency OFDM structure with the ICI estimation function. The receiving end is processed according to the following steps: a, converting proceeding FFT of an OFDM sign to a frequency domain, taking out the pilot frequency, and carrying out ICI elimination signal channel estimation; b, carrying out counter modulation after using the signal channel estimation in the first step for coarse balancing; c, using the signal channelestimation in the first step for time domain linear continuous sign signal channel estimation; d, calculating ICI signal channel matrixes through cyclic convolution by using a time domain pulse response structure in the third step, and obtaining ICI interference matrixes; and e, carrying out ICI elimination through combining counter modulation signals in the second step and ICI interference matrixes in the fourth step, and making the judgment after the secondary balancing. The invention solves the problem of influence on OFDM by interference between carrier waves under the condition of lineartime change signal channels, and improves the frequency spectrum utilization rate and the system performance.