62 results about "Reference array" patented technology

The invention relates to the technical field of array signal processing, in particular to a space-frequency power inversion anti-interference method fusing SMI-LDL decomposition. The problems that an existing space-time anti-interference technology is high in calculation complexity, and real-time processing is difficult to achieve in limited resources of a navigation receiver are mainly solved. The method comprises the following steps: firstly, converting a radio frequency signal received by an array into a digital intermediate frequency signal and carrying out sliding window partitioning processing; windowing the data block and performing FFT (Fast Fourier Transform) to obtain a frequency domain array; then calculating an auto-covariance matrix R of other array elements except the reference array element and a cross-covariance matrix r of the reference array element and other array elements; lDL decomposition is carried out on the auto-covariance matrix to obtain a lower triangular matrix L and a diagonal matrix D, and inversion is carried out on the lower triangular matrix L and the diagonal matrix D respectively, so that huge operand caused by direct inversion of the covariance matrix is avoided; and finally, calculating an optimal weighting vector according to a power inversion criterion, and performing spatial filtering on the frequency domain data.

A multiply and accumulate calculation device including a variable resistor array unit having a plurality of variable resistance elements, a reference array unit having a reference resistance element having a fixed resistance value, a signal input unit that generates an input signal from input data, and inputs the input signal to the variable and reference resistance elements, a first detection unit that detects a current flowing through the variable resistor array unit, based on the input signal applied to the variable resistance elements, a second detection unit that detects a current flowing through the reference array unit, based on the input signal applied to the reference resistance element, and a correction calculation unit that performs a predetermined calculation on the output from the first detection unit, based on the output from the second.

The invention discloses a Hash connection implementation method, electronic equipment, a computer readable storage medium and a computer program product, and the method comprises the steps: creating a reference table according to an implementation method for foreign key reference and connection query based on an array index, automatically creating a reference array index for the reference table through a specified option when the reference table is created, and automatically creating a connection query result according to the reference array index. Meanwhile, a referenced array index is automatically created for the referenced table; a column of reference is added to the created reference array index, and a new reference array index is obtained; constructing a byte array according to [the maximum subscript used in the quoted array index corresponding to the quoted table / 8] + 1, and setting the content of the byte array as 0; for all records meeting conditions in the referenced table, setting a bit corresponding to the byte array as 1; all units in the reference array index are sequentially scanned, and for the matching condition, the required referenced table and the corresponding record information of the reference table are directly output to an upper-layer operator.

The invention relates to the technical field of hydrological sediment monitoring, and particularly discloses a design method and device for an anti-freeze-thaw steel plate bayonet weir in an alpine region. Firstly, long-term dynamic stability of the geometrical shape of the weir body under frost heaving and thaw collapse is guaranteed through cooperation of the phase-change material temperature control layer and the prestress self-adaptive anchor rods; secondly, an optical fiber reference array embedded into the weir plate and a multi-mode sensor fusion algorithm are utilized, real-time self-calibration of water level and sand content measurement data is achieved, and measurement errors caused by low temperature, icing and micro-deformation are effectively overcome; and finally, through task cooperative dynamic energy consumption management and self-adaptive flow channel adjustment based on upstream deposition perception, long-term continuous, intelligent and reliable operation of the whole system under the conditions of limited energy and harsh environment is ensured. According to the invention, full-chain optimization from stable structure and accurate sensing to system self-adaption is realized, and the precision and reliability of runoff sediment automatic monitoring in the alpine region are obviously improved.

A camera tracking system receives patient reference tracking information indicating pose of a patient reference array tracked by a patient tracking camera relative to a patient reference frame. A local XR headset view pose transform is determined between a local XR headset reference frame and the patient reference frame. Remote reference tracking information is received indicating pose of a remote reference array tracked by a remote reference tracking camera. A remote XR headset view pose transform is determined between a remote XR headset reference frame of a remote XR headset and the remote reference array. A 3D computer image is transformed from a local pose determined using the local XR headset view pose transform to a remote pose determined using the remote XR headset view pose transform. The transformed 3D computer image is provided to the remote XR headset for display with the remote pose relative to the remote XR headset reference frame.

According to the memory and the control method thereof provided by the invention, the memory comprises a reading circuit and a memory array, the memory array comprises memory units and at least one row of reference units parallel to the memory units, and the reference units comprise first reference switch tubes with the same number as memory switch tubes in the memory units; the reading circuit comprises a sensitive amplifier and a reference array unit, the data input end of the sensitive amplifier is electrically connected with the bit line of the storage unit through a data switch tube, and the reference input end of the sensitive amplifier is electrically connected with the output end of the reference array unit. And the input end of the reference array unit is electrically connected with the reference lines connected with all the reference units through a second reference switch tube. According to the invention, parasitic influence and electric leakage influence can be counteracted, so that errors at two ends of data of the sensitive amplifier are reduced, and the reading accuracy is improved.

A method for encoding comprising: obtaining (700) a target block; obtaining a neighbor template of samples in a reconstructed neighborhood of the target block, a width of the neighbor template being based (701, 702, 703) on a height of the target block and a height of the neighbor template being based (704, 706, 705) on a width of the target block; determining a predictor block for the target block based on a minimization of a distortion between a prediction of the neighbor template from a reference array of samples in a reconstructed neighborhood of the neighbor template and the neighbor template.

The present application belongs to the technical field of mechanical arm control, and particularly provides a mechanical arm registration method, device, system and storage medium, the method is applied to the controller in the mechanical arm registration system, the controller is connected with the mechanical arm, the free end of the mechanical arm is connected with the flange, the flange is connected with the connecting block, three verification points are arranged on the connecting block, the connecting line of the three verification points is in triangular structure, the verification points are matched with the optical probe tip; the optical probe tip is defined with a probe coordinate system, the probe coordinate system can be recognized by a positioning camera, and one side of the end of the mechanical arm is provided with a mechanical arm end reference array which can be recognized by the positioning camera. The three verification points arranged on the connecting block are matched with the optical probe to collect the position of the verification point, the conversion matrix under multiple coordinate systems is transformed, so that the mechanical arm registration can be completed when the mechanical arm maintains the same pose, and the dependence of the mechanical arm registration on the free space is reduced.

The application provides a method for analyzing steady-state direct current interference of an uncertain single interference source, which comprises simulation parameter setting, simulation calculation, extraction of a simulation reference pipe section, establishment of a reference array set, entry into analysis and judgment, extraction of a monitoring reference pipe section, establishment of a monitoring potential curve, establishment of a monitoring array set, correlation calculation and correlation judgment. Embodiments of the application utilize inherent potential distribution characteristics of steady-state direct current interference, simulate potential waveforms generated on a pipeline by different interference points at different distances from an interference source, intercept a part with unclear characteristics in the potential waveforms through extraction of a simulation reference pipe section, record a current potential waveform when a target pipe section appears abnormal interference, intercept a part with unclear characteristics in the potential waveforms through extraction of a monitoring reference pipe section, and determine whether the current abnormal interference is steady-state direct current interference through similarity between the potential waveform with characteristics in the abnormal state and the simulation characteristic potential waveform, so that identification of steady-state direct current interference is realized.

Dynamic reference arrays use markers and trackers to register a patient's anatomy to computer system. Wherein the dynamic reference array may be screwed into a patient's spinous process, clamped on to a spinous process, or attached to the spinous process using posts. In embodiments, a dynamic reference array may comprise a single structure comprising and attachment member and a scaffold. In alternate embodiments, the dynamic reference array may comprise distinct structures that allow the dynamic reference array to swivel and collapse in order to facilitate registration, while not interfering with a surgical procedure.

A memory searching engine is provided in present disclosure. The memory searching engine stores at least one reference time and at least one reference voltage corresponding to multiple Hamming distances and comprises a data array and a reference array. The data array stores at least one first pattern data and is configured to perform a data searching according to the difference between at least one input data and the first pattern data. The reference array stores at least one second pattern data and receives the input data. Each of the first and second pattern data comprises m features, wherein m is an integer. The memory searching engine calculates multiple updated reference times and updated reference voltages corresponding to the Hamming distances based on the second pattern data, and update the reference time according to the updated reference times, or update the reference voltage according to the updated reference voltages.

Embodiments disclosed herein provide systems and methods for testing and repairing various aspects of an electronic display. The electronic display includes a reference array and an active array. The electronic display also includes test circuitry for testing individual pixels or any combination of pixels of the electronic display. Switches can be disposed between the pixels and the test circuitry to repair various components of the electronic display.

A camera tracking system for computer assisted navigation during surgery. The camera tracking system includes a processor operative to receive streams of video frames from tracking cameras which image a plurality of physical objects arranged as a reference array. For each of the physical objects imaged in a sequence of the video frames, that processor determines a set of coordinates for the physical object over the sequence of the video frames. For each of the physical objects, the processor generates an arithmetic combination of the set of coordinates for the physical object. The processor generates an array template identifying coordinates of the physical objects based on the arithmetic combinations of the sets of coordinates for the physical objects, and tracks pose of the physical objects of the reference array over time based on comparison of the array template to the reference array imaged in the streams of video frames.

The application relates to the technical field of water quality detection, and discloses a water quality fluoride detection method based on digital image colorimetric analysis, which comprises the following steps: constructing a zirconium-based nanoscale enzyme probe, realizing specific recognition of fluorine ions through Zr-Mn bimetal coordination and boric acid modification; developing a three-layer paper-based microfluidic chip, fixing the zirconium-based nanoscale enzyme probe, integrating an optical reference array and a distributed temperature control network; synchronously collecting double-mode images of reflection and fluorescence through intelligent mobile phone collaborative control of multi-band light source switching; extracting multi-color space features, fusing environmental parameters to construct a dynamic compensation matrix to correct matrix interference; processing the corrected features to output fluoride concentration and a confidence interval; and writing the detection data into a block chain after encryption, and realizing data verification and over-limit alarm through an intelligent contract. The application has the advantages of simple operation, low cost, strong portability and on-site rapid detection, and is suitable for on-site rapid detection of various water quality fluorides.

The application is suitable for the technical field of phased array antenna calibration, and provides a phased array antenna calibration method, device, medium and antenna system.The method comprises the following steps: acquiring network level information of a phased array antenna; acquiring amplitude ratio of field strength amplitude of each antenna unit relative to field strength amplitude of a reference array field, phase difference value; acquiring a to-be-calibrated signal port and the like; and finally obtaining phase and amplitude adjustment amount of the to-be-calibrated signal port.The application has the advantages that the array overall amplitude consistency can be effectively optimized, the array overall amplitude consistency is improved, the array synthesized field quality is improved, the influence of single antenna unit measurement error or local anomaly on the overall calibration result is effectively reduced, and the stability of the calibration result is improved.

The application relates to a pose adjustment method, device, equipment, medium and program product of a navigation device. The method comprises the following steps: acquiring a field of view image collected by the navigation device; acquiring relative pose information between a reference array in a working space and the navigation device according to the field of view image; adjusting the position of the navigation device according to the field of view depth range of the navigation device and the relative pose information; and adjusting the attitude of the navigation device after the position adjustment according to the relative pose information, so that the reference array is in the field of view range of the navigation device. The method can improve the pose adjustment accuracy in a complex and changeable environment.

The embodiment of the invention relates to the technical field of radio, and discloses an array element calibration method, a phase unwrapping method, a storage medium and an integrated circuit. The method comprises the following steps: acquiring N target echo signals of an array element by rotating a rotary table on which an antenna array is fixed; n target echo phases corresponding to the target array element under the N target angles are obtained, the target echo phases are phases aligned with a preset reference array element, and the target angle is obtained by using the linear relation between the target echo phases and the target angles. And predicting the target echo phase of the target array element at the nth target angle according to the setting position of the target array element under the condition that the difference between the actually detected target echo phase x 'k, n and the actually detected target echo phase x' k, n is greater than a preset threshold, performing 2pi compensation on x 'k, n, and obtaining the unwound target echo phase. Therefore, the calibration of the array element does not depend on manually writing a logic judgment expression to realize the unwrapping of the phase, thereby greatly reducing the manpower and time cost, and facilitating the batch correction operation.

An apparatus includes a reference array, a bone anchor, a receiver assembly coupled to the bone anchor, and an adapter axially locked with the receiver assembly. The adapter includes a proximal end coupled to the reference array and a distal end coupled to the receiver assembly.

A camera tracking system receives patient reference tracking information indicating pose of a patient reference array tracked by a patient tracking camera relative to a patient reference frame. A local XR headset view pose transform is determined between a local XR headset reference frame and the patient reference frame. Remote reference tracking information is received indicating pose of a remote reference array tracked by a remote reference tracking camera. A remote XR headset view pose transform is determined between a remote XR headset reference frame of a remote XR headset and the remote reference array. A 3D computer image is transformed from a local pose determined using the local XR headset view pose transform to a remote pose determined using the remote XR headset view pose transform. The transformed 3D computer image is provided to the remote XR headset for display with the remote pose relative to the remote XR headset reference frame.

This invention provides a sound source localization method based on offline library construction of array element coordinates, which can be applied to the field of sound source localization technology. The method is applied to a localization array, which includes multiple array elements, among which a reference array element is included. The method includes: for each of the multiple array elements in any scanning direction within its scanning range; acquiring the scanning signal corresponding to each of the multiple array elements in its scanning direction; calling the fractional delay coefficient library and integer delay library corresponding to each of the multiple array elements; determining the fractional delay coefficient and integer sampling delay corresponding to each of the multiple array elements in its scanning direction; performing time delay compensation on the scanning signal to obtain the scanning compensation signal corresponding to each of the multiple array elements in its scanning direction; obtaining the signal spatial spectrum corresponding to any scanning direction based on the scanning compensation signal corresponding to each of the multiple array elements in any scanning direction; and determining the target direction of the sound source to be located within the scanning range.

The invention relates to a pose adjusting method, device and equipment of navigation equipment, a medium and a program product. The method comprises the following steps: acquiring a field-of-view image acquired by navigation equipment; acquiring relative pose information between a reference array in the working space and the navigation equipment according to the view field image; adjusting the position of the navigation equipment according to the view depth range and the relative pose information of the navigation equipment; and according to the relative pose information, adjusting the pose of the navigation equipment after position adjustment, so that the reference array is located in the view field range of the navigation equipment. By adopting the method, the pose adjustment accuracy in a complex and changeable environment can be improved.

A camera tracking system for computer assisted navigation during surgery. Operations identify stray markers in a frame of tracking data from tracking cameras, and identify stray markers of a reference array. Stray markers of the reference array are designated assigned status and, otherwise, designated unknown status. The operations designate other of the assigned status stray markers and any of the unknown status stray markers along a same epipolar line of the tracking cameras as one of the assigned status stray markers as being epipolar ambiguous status. For each one of the epipolar ambiguous status stray markers, the operations estimate 3D locations where phantom markers can appear in the frame based on epipolar ambiguity of the tracking cameras when determining location of the one of the epipolar ambiguous status stray markers. The operations designate the unknown status stray markers within a threshold distance of the estimated 3D locations of phantom markers as being phantom status.

The invention discloses an underwater acoustic target orientation estimation method and device based on line spectrum focusing and a storage medium, and relates to the technical field of signal processing. The method comprises the following steps: receiving a broadband radiation noise signal of a target through a sensor array, selecting a reference array element to receive the signal, and performing short-time Fourier transform on the signal to extract a line spectrum signal frequency generated by target movement; an array receiving signal is converted to a frequency domain, and a sub-band covariance matrix with each line spectrum as the center is calculated; constructing a focusing transformation matrix based on the estimated incident angle and the reference frequency, mapping the signal subspace under each line spectrum frequency to the signal subspace of the reference frequency, and calculating the geometric average of a covariance matrix after focusing; and finally, performing spectrum peak search by using a MUSIC algorithm to obtain a target orientation. Therefore, not only is the accuracy of azimuth estimation significantly improved and the phenomenon of multi-target confusion in the BTR map avoided, but also the calculation complexity is greatly reduced and the operation time is saved by executing the focusing transformation only in the narrow band adjacent to the line spectrum.

The invention relates to the technical field of phased-array antenna calibration, in particular to a parallel calibration method based on a multi-unit dual-circular-polarization phased-array spherical antenna, which comprises the following steps of: fusing a calibration clamp and a direct coupling coefficient matrix of array elements and a mutual coupling coefficient matrix among the array elements to obtain a three-dimensional coupling matrix; constructing a full-link signal model to synchronously acquire multiple paths of dual-polarization signals; any array element is selected as a reference array element, and initial calibration is carried out; performing channel separation on the dual-polarization signal, eliminating mutual coupling interference, and using the dual-polarization signal as a correction signal for calculating calibration parameters of all array elements relative to the reference array element; and when the phased array spherical antenna carries out beam forming, carrying out real-time calibration on the multiple paths of dual-polarized signals by using the calibration parameters. According to the invention, the amplitude and phase consistency between large-scale receiving channels is improved, and a reliable calibration foundation is laid for a high-performance multi-beam phased array system.

The present application relates to the field of underwater acoustic engineering, ocean engineering and sonar technology, and particularly relates to a target detection method and system based on a deep-sea large-aperture vertical array. The method comprises the following steps: step 1: receiving a time-domain signal radiated by a target sound source through a large-aperture vertical array arranged on the seabed in deep sea; step 2: performing fast Fourier transform on the time-domain signal received by each array element to obtain a corresponding signal spectrum; step 3: calculating a steering vector according to the phase difference of the depth of each array element of the large-aperture vertical array relative to a reference array element; based on the steering vector, processing the signal spectrum of different array elements through a spatial power spectrum estimation method to obtain a spatial power spectrum estimation result under different angles of arrival angles, so as to realize detection of the target sound source.

The invention provides a reference current generating circuit tracking bit line voltage and a nonvolatile memory, the nonvolatile memory comprises a bit line clamping circuit, and the bit line clamping circuit is used for setting the bit line voltage as a preset voltage value before read operation. The reference current generating circuit comprises a tracking current generating circuit and a constant current generating circuit which are electrically connected; the constant current generation circuit is used for generating constant current based on the accessed reference voltage and outputting the constant current; the tracking current generating circuit is used for generating and outputting tracking current for tracking the current variation of the storage unit under the action of the bit line voltage; wherein the sum of the output constant current and the tracking current forms a reference current. The reference current generation circuit disclosed by the invention can track current change caused by bit line voltage change and temperature change of the storage unit, the accuracy and the reading speed of reading operation are improved, and a reference array is avoided, so that the risk of voltage stress is avoided.

Embodiments of the present application provide a resistance measurement circuit, a resistance measurement method, an electronic device and a resistance measurement device. The resistance measurement method is applied to the resistance measurement circuit, and the resistance measurement method comprises: acquiring a pull-up voltage output by a voltage generator to a voltage division detection circuit; determining a reference array resistance value of a reference resistance array based on an adjustable resistance range of the reference resistance array, and controlling the opening and closing states of all switches to make the current resistance value of the reference resistance array reach the reference array resistance value; acquiring a node voltage corresponding to a connection node between the reference resistance array and a to-be-measured resistance; and determining a target resistance value of the to-be-measured resistance based on the pull-up voltage, the node voltage and the reference array resistance value of the reference resistance array. The method controls the low-cost resistance measurement circuit to achieve efficient and accurate resistance value measurement of the to-be-measured resistance.

In one aspect, a system is configured for managing a change in cell characteristics due to process, voltage, temperature and aging of cells as well as any local variations of a flash cell array, comprising: a flash cell array subject to characteristic change and or local variation issue; a reference system comprising: a reference flash cell array comprising an “N” number of flash cells configured to overcome the characteristic change and or local variation issue by generating a reference voltage (CG_ref) that is applied to track the cell changes and local variations of the flash cell array; a reference current (I_ref) that is injected into the reference flash cell array to enable the reference array system to track the flash cell array; and a reference array bit-line driver system that maintains a same bit-line voltage (bl_ref) of both the flash cell array and the reference flash cell array; and a flash-cell current receiving unit coupled with the flash cell array and configured to receive the same bit-line voltage (bl_ref) of both the flash cell array and the reference flash cell array.

A camera tracking system is disclosed for computer assisted navigation during surgery. The camera tracking system is configured to identify a reference array tracked by a set of tracking cameras attached to an extended reality (XR) headset, and determine whether the reference array is registered as being paired with characteristics of one of a plurality of surgical tools defined in a surgical tool database. The camera tracking system is further configured to, based on the reference array being determined to not be registered and receiving user input, register the reference array to be paired with characteristics of one of the plurality of surgical tools selected based on the user input. The camera tracking system is further configured to provide a representation of the characteristics to a display device of the XR headset for display to the user.

According to the memory and the control method thereof, the memory comprises a reading circuit and two memory arrays which are symmetrically designed, the reading circuit comprises a sensitive amplifier and a reference array unit, bit lines of the two memory arrays are electrically connected to the data input end of the sensitive amplifier through a data switch, and the reference array unit is electrically connected to the data input end of the sensitive amplifier. The reference arrays are electrically connected to the input end of the reference array unit through the reference switch, and the output end of the reference array unit is electrically connected with the reference input end of the sensitive amplifier. According to the invention, parasitic influence and electric leakage influence can be counteracted, so that errors at two ends of data of the sensitive amplifier are reduced, and the reading accuracy is improved.