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385 results about "Multiple pulse" patented technology

Transcranial electrical stimulation using poly-modulated waveforms

The patent application describes an adaptable neuromodulation device for transcranial electrical brain stimulation. The system can generate complex poly-modulated waveforms by combining multiple pulse parameters in a randomized manner across dimensions like amplitude, frequency, phase, timing, and polarity. It leverages both digital and analog modulation techniques for waveform versatility. The device features pathway optimization algorithms that tune stimulation using neural feedback data to target specific brain region shapes with greater precision. It also enables closed-loop operation for responsiveness to physiological changes. The application details the mathematical and computational foundations, spanning graph theory to generate digital twins. It highlights applications from cognitive enhancement to seizure control. Overall, the innovation promises versatility and precision in non-invasive neuromodulation through adaptable, optimized waveforms grounded in sophisticated modeling.
Owner:U LLC

Multi-motor pulse speed regulation control method and system

The invention provides a multi-motor pulse speed regulation control method and system, and relates to the technical field of motor control, the method comprises the steps that a target set quantity and a target motor identifier are obtained, a target driving parameter is obtained through conversion according to a parameter set associated with the target motor identifier, and the parameter set comprises an elastic modulus value and a stress relaxation coefficient of a peristaltic pump hose; real-time driving parameters are maintained for the multiple pulse output channels respectively, and refreshing is carried out at the synchronization moment; operating state feedback values of a peristaltic pump channel and a stirring motor channel are collected, a water hammer effect frequency component and an impeller passing frequency component are extracted, and correction is carried out based on the elastic parameters; and judging whether a cross-channel resonance judgment condition is met or not, and when the condition is met, determining a frequency correction amount and a phase correction amount and applying the correction amounts to at least one pulse output channel, thereby reducing the resonance risk and stabilizing the system operation.
Owner:SHANGHAI BAOXING BIOLOGY EQUIP ENG CO LTD

Response performance test method and system of microswitch

The invention relates to a response performance test method and system of a microswitch. The method comprises the following steps: inputting a multi-pulse trigger sequence to a microswitch contact and collecting contact response original data; performing digital filtering processing on the contact response original data to obtain contact response time sequence data; comprehensive response time parameters including contact mechanical action starting time, electrical initial contact time and electrical stable contact time are calculated according to the contact response time sequence data; performing temperature compensation and contact rebound characteristic extraction on the comprehensive response time parameter to obtain contact rebound characteristic evaluation data; according to the contact rebound characteristic evaluation data and the comprehensive response time parameter, the response performance stability of the microswitch under the high-frequency operation condition is calculated, and a reliability evaluation result is generated. According to the invention, the problem of time sequence measurement error caused by the influence of contact jitter in the traditional test is effectively solved, and the accuracy and consistency of contact response time measurement are remarkably improved.
Owner:ZHUHAI TUOLIN ELECTRONIC TECH CO LTD

High-resolution peak value positioning method based on multi-pulse superposition and offset clock cooperation

The invention discloses a high-resolution peak value positioning method based on multi-pulse superposition and offset clock cooperation, and belongs to the technical field of laser radar ranging. Aiming at the problems that a traditional laser radar depends on a high-sampling-rate ADC, so that hardware cost is high, power consumption is large, and sampling errors are likely to be caused by echo jitter, the method does not need to replace an existing ADC, and the technical breakthrough is achieved through the following core steps that firstly, the basic sampling rate X Hz and the target equivalent sampling rate improvement multiple N of the ADC are determined; laser pulses are emitted to a target object for N times, during Kth emission, ADC sampling is started by delaying (K-1) / (X * N) seconds, and N groups of echo data with time sequence offset are obtained; performing cross combination on the N groups of data, and constructing an N-time equivalent high-sampling-rate data sequence; repeating the sampling and combining process for S times, and performing alignment superposition and averaging on S groups of data to suppress echo jitter and noise; and estimating initial parameters (amplitude, mean value and standard deviation) of a Gaussian model based on the superposed data, optimizing the parameters through an LM nonlinear optimization algorithm, and finally taking the optimized mean value as a high-precision peak position of an echo signal to realize accurate measurement of the laser flight time. Under the condition of low-sampling-rate hardware, through the collaborative design of clock skew and multi-pulse superposition, the physical limitation of the sampling rate is broken through, low cost, low power consumption and high ranging precision are taken into account, and the method is adaptive to multi-scene application of automatic driving, industrial ranging and the like.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Multi-pulse detection and communication integrated sonar signal design method and device

The invention discloses a communication-detection integrated sonar signal design method and device based on multi-pulse composite modulation, and the method comprises the steps: dividing a total frame period into a detection sub-frame and a communication sub-frame, enabling the detection sub-frame to achieve the high-resolution distance measurement through employing a bidirectional linear frequency modulation (BILFM) signal, a communication sub-frame adopts a multi-frequency multi-phase composite modulation (MTPM) signal to realize high-bit-rate data transmission; after band filtering, orthogonal demodulation, low-pass filtering and down-sampling preprocessing are carried out on detection sub-frame echoes, distance and speed information is extracted by adopting fast-time low-sampling two-dimensional fast Fourier transform (2D-FFT), unambiguous Doppler frequency is recovered by utilizing the Chinese remainder theorem (CRT), and accurate speed measurement of long-distance and high-speed targets is realized; a communication subframe receiving signal is subjected to IQ demodulation after down-conversion, Costas loop carrier synchronization and matched filtering, and multi-frequency multi-phase coded data are extracted. According to the method, the time-frequency collaborative design of detection and communication is realized, the distance resolution and the speed measurement range are considered, and the signal bandwidth utilization rate and the underwater information transmission reliability are remarkably improved while the system complexity is kept low. The device comprises a processor and a memory, and an executable program for implementing the method is stored in the memory. The technology can be widely applied to the fields of unmanned underwater vehicles, ocean monitoring, underwater sensing networks and the like.
Owner:ZHEJIANG UNIV OF TECH

Optical time-domain reflectometer, and method for eliminating interference fading

The present invention relates to the technical field of optical fiber sensing, and particularly relates to an optical time-domain reflectometer, and a method for eliminating interference fading. The optical time-domain reflectometer comprises: a laser device, a frequency-division multiplexing modulator, a circulator and a signal processing apparatus, wherein the frequency-division multiplexing modulator comprises a first modulator, a second modulator, a first attenuator and a second attenuator; the laser device is used for generating a coherent light source, and the coherent light source sequentially passes through the first modulator and the first attenuator, so as to obtain a first pulsed light signal; the coherent light source sequentially passes through the first modulator and the second modulator, so as to obtain a second pulsed light signal; and the coherent light source sequentially passes through the second attenuator and the second modulator, so as to obtain a third pulsed light signal. Therefore, by means of different combinations of the first modulator, the second modulator, the first attenuator and the second attenuator, multiple pulsed light signals can be outputted; and compared with the prior art, hardware costs are saved.
Owner:ACCELINK TECHNOLOGIES CO LTD

ISAR multi-pulse cumulative cross-correlation distance and phase correction system based on FPGA

The invention discloses an ISAR (Inverse Synthetic Aperture Radar) multi-pulse accumulation cross-correlation distance and phase correction system based on an FPGA (Field Programmable Gate Array). The ISAR multi-pulse accumulation cross-correlation distance and phase correction system comprises an upper computer and the FPGA, the upper computer is used for controlling the inverse synthetic aperture radar system to transmit a signal and receiving an echo signal; performing de-line frequency modulation on the echo signal to obtain an echo signal after pulse compression, and preprocessing the echo signal to obtain a to-be-processed echo signal; quantizing the echo signal to be processed, acquiring a quantized echo signal, transmitting the quantized echo signal to the FPGA, and receiving the distance returned by the FPGA and the echo signal after phase correction; and the FPGA is used for executing a multi-pulse cumulative cross-correlation envelope alignment algorithm to perform alignment processing on the quantized echo signal, obtaining a corrected echo signal and returning the corrected echo signal. The register transfer stage circuit based on the multi-pulse cumulative cross-correlation envelope alignment algorithm is designed based on the FPGA, high-parallelization acceleration based on the multi-pulse cumulative cross-correlation envelope alignment algorithm module is achieved, and the processing speed and efficiency of the algorithm are remarkably improved.
Owner:XIDIAN UNIV

Low-harmonic high-voltage speed regulation system based on multi-pulse phase-shifting transformer

The invention discloses a low-harmonic high-voltage speed regulation system based on a multi-pulse phase-shifting transformer, and particularly relates to the field of power electronic technology and motor speed regulation, which is characterized in that the primary side of the multi-pulse phase-shifting transformer is in star connection, and N groups of windings on the secondary side are in extended delta connection, so that phase difference is realized; the multi-path low-voltage alternating current is converted into multi-path low-voltage alternating current and low-order harmonics are High voltage is output through cascade H-bridge topology series connection, and reliable conversion is guaranteed through rectification filtering inversion and device redundancy design; the motor control module collects signals through multiple sensors, and PWM drive signals are generated through a vector control algorithm and coordinate transformation. The harmonic detection and compensation module detects harmonic waves based on an FFT algorithm, and injects a reverse compensation component through a modulation strategy to offset the harmonic waves; and the auxiliary protection module integrally realizes low-harmonic and high-precision high-voltage motor speed regulation through multi-dimensional monitoring and hardware protection.
Owner:BEIJING HUICHUAN TECHNOLOGY CO LTD

Semiconductor laser with adjustable time domain

The invention relates to the technical field of semiconductor lasers, in particular to a semiconductor laser with an adjustable time domain. According to the time-domain-adjustable semiconductor laser, a mutual injection coupling region and a gain region are arranged on a semiconductor laser chip, the mutual injection coupling region comprises multiple sections of interval units, and the ratio of the length of a saturable absorber region to the length of the gain region in a resonant cavity is controlled by adjusting the absorption / gain characteristics of the interval units. And a plurality of pulse generation mechanisms are switched to adjust the pulse width. On the premise that the structural complexity of the semiconductor laser is reduced, large-range adjustment of laser pulses can be achieved.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Ultrafast laser multi-pulse sequence preparation device and method

The invention belongs to the technical field of laser pulse modulation, and particularly relates to an ultrafast laser multi-pulse sequence preparation device and method. According to the invention, ultrafast pulse laser is divided into a transmission light path and a reflection light path through a beam splitter, a spatial light modulator is utilized to perform programming control on a target pulse in the transmission light path, and amplitude and pulse width parameters can be controlled while multiple pulse strings are generated; and the light path of the reflection light path is controlled through the high-precision one-dimensional displacement table, so that the time delay of a reflection light path pulse relative to a transmission light path pulse is controlled. And after the reflected light path and the transmission path subjected to pulse shaping are combined again, a periodic pulse string sequence with controllable time delay, pulse number, pulse width parameter and pulse intensity is realized. The problem that high-precision multi-pulse dynamic programming cannot be achieved through a traditional adjusting mode is solved, and the problems that in the prior art, the number of excitation pulses and pulse width parameters cannot be controlled at the same time, and an ordered periodic pulse sequence cannot be generated are solved.
Owner:SHANXI UNIV

Battery charging and discharging pulse frequency detection method and system

The invention provides a battery charging and discharging pulse frequency detection method and system, and the method comprises the steps: dividing a pulse current signal of a target battery during charging and discharging into a plurality of pulse signal segments, and determining the static deviation of the current of the target battery during charging and discharging based on the local current characteristics of each pulse signal segment; determining the time domain positioning error of the time interval through the static offset and the pulse width of the pulse current signal; monitoring the surface temperature of the target battery during charging and discharging, and determining the disturbance characteristics of the temperature of the target battery during charging and discharging to the current according to all the monitored temperatures and the pulse current signal; and performing pulse identification on the pulse current signal according to all the time domain positioning errors and disturbance characteristics to obtain an effective pulse time mark sequence of the target battery during charging and discharging, and determining an effective pulse frequency of the target battery during charging and discharging based on the effective pulse time mark sequence. According to the scheme, the influence of current signal drift on pulse frequency detection in the battery charging and discharging process can be reduced.
Owner:深圳市联明电源股份有限公司

Transient electromagnetic global apparent resistivity definition method based on differential pulse

The invention discloses a transient electromagnetic global apparent resistivity definition method based on differential pulses, and relates to the technical field of artificial source electromagnetic detection, and the method comprises a transient electromagnetic field response calculation method based on a step wave emission waveform, and an electromagnetic forward modeling method for obtaining the differential pulses by adopting a time shift method. Based on a differential pulse transient electromagnetic forward modeling method, electromagnetic fields under different pulse widths, different flight heights and different offsets are calculated, and curve characteristics of the electromagnetic fields changing along with resistivity are analyzed; selecting a target electromagnetic field component, and adopting an inverse function theorem to obtain a global apparent resistivity iteration expression based on a differential pulse emission waveform; according to the transient electromagnetic global apparent resistivity defining method, the global apparent resistivity of multiple pulse width differential pulses is calculated through a global apparent resistivity iteration expression, underground comprehensive electrical characteristics are obtained through a correlation superposition algorithm, and the transient electromagnetic data interpretation capacity is improved through the transient electromagnetic global apparent resistivity defining method.
Owner:YUNLONG LAKE LAB OF DEEP UNDERGROUND SCI & ENG

Radar data technology system for monitoring tiny target

The invention relates to the field of radar detection and signal processing, and particularly discloses a radar data technology system for monitoring a tiny target, and the system comprises a signal receiving and transmitting module which is used for generating and transmitting a linear frequency modulation signal based on a linear frequency modulation technology, and receiving an original echo signal reflected by the target; the pulse compression processing module is used for performing complex convolution operation on the original echo signal based on a matched filter to generate a compressed pulse signal; the multi-pulse coherent accumulation module is used for performing frequency domain energy accumulation on a plurality of compressed pulse signals of the same distance unit based on a discrete Fourier transform technology; and the Kalman filtering tracking module is used for processing the signals after multi-pulse coherent accumulation through a Kalman filtering algorithm, predicting and updating a target state in real time, and generating final trace point data. According to the invention, through key technologies of large-time wide-bandwidth pulse compression, multi-pulse coherent accumulation and the like, the detection capability of the radar on a tiny target is remarkably improved.
Owner:HANGZHOU WANGUO RUANBAO INFORMATION TECH CO LTD

Single / multi-pulse impact load equivalent test method

The invention relates to the technical field of impact loads, in particular to a single / multi-pulse impact load equivalent test method. The invention aims to provide an impact load test method capable of simulating different impact pulse widths under a live impact load through an existing impact load test method, namely a single / multi-pulse impact load equivalent test method. Comprising the steps of building a physical analysis model, building a model vibration equation and calculating a displacement response function, calculating a displacement response result, building a linear regression model, optimizing and improving the model, reducing the model in a nonlinear mode, and completing an equivalent test. The single / multi-pulse impact load equivalent test method provided by the invention can equivalently simulate a dynamic impact environment among different impact load parameters, and is wide in applicability and low in cost.
Owner:ZHONGBEI UNIV

Ultrasonic liquid level measuring system and device

The invention discloses an ultrasonic liquid level measurement system and device.The ultrasonic liquid level measurement system comprises a converter calibration circuit, a transducer calibration circuit, a liquid level measurement control circuit, a transducer, a first contact and a second contact, one end of the first contact is connected with the liquid level measurement control circuit, one end of the second contact is connected with the transducer, and the other end of the second contact is connected with the transducer. The converter calibration circuit excites an echo signal analog signal according to a multi-pulse driving signal of the liquid level measurement control circuit, the transducer calibration circuit carries out blind area calibration and sensitivity compensation based on the current blind area liquid level, when the converter is calibrated, the first contact and the converter calibration circuit are conducted, and the transducer calibration circuit is switched on. The liquid level measurement control circuit is connected with the converter calibration circuit through a first contact; when the transducer is calibrated, the second contact and the transducer calibration circuit are conducted, and the liquid level measurement control circuit is connected with the transducer calibration circuit through the second contact. The converter calibration circuit and the transducer calibration circuit are used for calibration, and the problems of liquid level measurement deviation and failure are solved.
Owner:HENAN HANWEI ELECTRONICS

Fiber laser for promoting stable soliton attraction state through high-birefringence fiber

The invention belongs to the technical field of lasers, and discloses a fiber laser for promoting generation of a stable soliton attraction state by using a high-birefringence fiber. The optical fiber laser comprises a laser pumping source, a wavelength division multiplexer, an erbium-doped gain optical fiber, a polarization independent isolator, a polarization controller, a polarization maintaining optical fiber, an output coupler and a mode locking device based on a carbon nanotube saturable absorber, and all the components are sequentially connected through single-mode optical fibers. The polarization-maintaining optical fiber is a panda-shaped polarization-maintaining optical fiber with a high birefringence effect. The polarization direction and the polarization state in the cavity are accurately controlled by adjusting the polarization controller, phase synchronization of soliton pulses is achieved when the polarization maintaining optical fiber is output, soliton energy in the cavity is rapidly accumulated, soliton splitting is triggered, and finally a stable multi-pulse soliton attraction state is formed. The design is simple and convenient to operate, and stability and anti-interference capability of soliton transmission are remarkably improved.
Owner:ZHEJIANG FORESTRY UNIVERSITY

A method for measuring arterial elasticity based on cuff pressure maintenance

The present invention is a method for measuring arterial elasticity under a cuff pressure-maintaining state, comprising step 1: adjusting a linear deflation valve to keep the air pressure of the cuff stable; step 2: collecting pulse waves under the cuff pressure-maintaining state; step 3: using FIR high-pass and low-pass filters to filter the signal, with passbands of 0.05HZ and 30HZ respectively; step 4: screening the obtained pulse wave signal, and eliminating the waveform under the state of body misoperation according to the width and amplitude of the pulse wave; step 5: using a linear function to eliminate the baseline; step 6: normalizing a single pulse; step 7: finding the starting point of the reflected wave; step 8: calculating the intensity of the reflected wave; step 9: screening the calculation results of multiple pulse waves. The present invention reduces the baseline rebound in the initial stage of pressure maintenance by adjusting the linear deflation valve, so that the useful pulse wave signal is more complete, and the use of a single airbag not only solves the problem of inconvenient measurement, but also can better reflect the degree of arteriosclerosis of the human body by measuring the elastic coefficient of the artery.
Owner:HONSUN NANTONG

Epoxy pouring multi-pulse phase-shifting transformer and design method thereof

The invention discloses an epoxy pouring multi-pulse phase-shifting transformer and a design method thereof, and belongs to the field of frequency conversion. By adopting an epoxy pouring structure and an accurate phase-shifting adjusting technology, the multi-pulse phase-shifting transformer disclosed by the invention has the characteristics of efficient voltage regulation and low harmonic wave, the stability, efficiency and safety of the transformer can be remarkably improved, and the multi-pulse phase-shifting transformer is widely applicable to industrial equipment, variable-frequency driving and high-power electric power systems which need accurate electric energy regulation and control.
Owner:WUJIANG TRANSFORMER CO LTD

Multi-pulse light source and multi-pulse light generation method

In a multi-pulse light source, a dispersion compensation unit includes a spectroscopic element configured to spectrally separate a plurality of wavelength components, a separation optical element that guides a first optical pulse group including one or more wavelength components among a plurality of wavelength components, and a second optical pulse group including one or more wavelength components different from the one or more wavelength components included in the first optical pulse group among the plurality of wavelength components to optical paths different from each other, a first spatial light modulator on which the first optical pulse group is incident and which compensates dispersion for each wavelength component with respect to the first optical pulse group, and a second spatial light modulator on which the second optical pulse group is incident and which compensates dispersion for each wavelength component with respect to the second optical pulse group.
Owner:HAMAMATSU PHOTONICS KK

Image restoration method and system based on spiking neural network

The invention discloses an image restoration method and system based on a pulse neural network. The method comprises the following steps: processing an original degraded image to obtain a plurality of degraded sub-images with different resolutions; constructing an image restoration model based on a pulse neural network and a multi-scale feature fusion mechanism, wherein the image restoration model comprises a pulse coding layer, a feature fusion network and a residual pulse decoding layer; the plurality of pulse coding layers are used for respectively carrying out pulse coding on the degraded sub-images with different resolutions to obtain multi-scale pulse characteristics; the feature fusion network adopts a U-Net architecture comprising an encoder and a decoder and comprises a plurality of stages, each stage processes pulse features input by a plurality of pulse coding layers in each stage, and multi-scale feature extraction and fusion are realized to gradually recover high-resolution image details; the residual pulse decoding layer decodes the pulse features to form an image restoration result; the trained image restoration model is used for image restoration, so that the image restoration quality is ensured, the time steps are remarkably reduced, and the energy consumption is reduced.
Owner:ZHEJIANG UNIV

A micro-displacement radar detection method, system, device and storage medium

The present invention relates to the field of micro-displacement detection technology, and specifically to a micro-displacement radar detection method, system, equipment and storage medium, and the steps are as follows: the radar transmits multiple groups of linear frequency modulation signals with different carrier frequencies for detection, and each group of signals includes multiple pulses; the echo received by each pulse is subjected to FFT transformation, and the results after FFT processing of all pulse groups are accumulated to obtain the range Doppler matrix of any pulse group; the range Doppler matrix of the first pulse group is subjected to target detection to obtain the detection target position, and the radar is repeatedly transmitted, and the fuzzy displacement is obtained by solving the phase difference of the detection target position; the phase difference between the detection target position and the detection target position of the subsequent pulse group is solved to obtain the rough displacement; the fuzzy displacement is solved based on the rough displacement to obtain the real displacement of the target. The present invention can increase the target signal-to-noise ratio, improve the detection capability and stability, and can accurately solve the target displacement even if the target displacement is greater than the radar wavelength.
Owner:YANGTZE DELTA REGION INST (QUZHOU) UNIV OF ELECTRONIC SCI & TECH OF CHINA

Dark space target detection and track prediction method, system and device under dense fixed star background and medium

A method, system, device and medium for detecting a dark space target and predicting a track under a dense fixed star background comprises the following steps: firstly, obtaining a reconstructed multi-pulse function by using a frequency spectrum phase difference, further estimating motion parameters of a dark star background and a space target, and then designing an image difference fusion coarse processing module to obtain a candidate target image sequence; the number of tracks is effectively reduced; and finally, according to the motion parameters and the candidate target image sequence, directional track association is carried out, an association area is reduced to a fan-shaped range, and redundant false alarms are removed while the target track is accurately and rapidly detected. The system, the equipment and the medium are used for realizing the invention. Based on the distribution characteristic of the space target and the time domain motion characteristic, the method not only achieves the precise suppression of fixed stars with different brightness, but also improves the detection robustness of targets with different star magnitudes, and has a better detection effect on dark space targets with different motion parameters under the background of dense fixed stars.
Owner:王文宇

ISAR coherent translation compensation and imaging method and device based on deep network

The invention provides an ISAR coherent translation compensation and imaging method and device based on a deep network, and relates to the technical field of radar signal processing. Comprising the following steps: performing pulse compression on ISAR echoes to obtain a plurality of echo signals after pulse compression; sequentially inputting the plurality of echo signals after pulse compression into a trained LSTM strategy network, so that the trained LSTM strategy network outputs a plurality of first distance grid offset estimated values; obtaining a target translation parameter according to the plurality of first distance grid offset estimation values and the resolution of the distance dimension; estimating the target translation parameter by using an Adam optimizer to obtain an optimal target translation parameter; and according to the optimal target translation parameter, performing compensation and coherent accumulation on the echo signals subjected to pulse compression to obtain a focused image. In this way, the compensation precision of the echo signals after the multiple pulses are compressed is high, and the accuracy of the imaging result of the focused image is high.
Owner:XIDIAN UNIV +1

Nutrition pump drip identification method, nutrition pump and electronic equipment

The invention provides a nutrition pump drop identification method, a nutrition pump and electronic equipment, and relates to the technical field of drop identification, and the nutrition pump drop identification method comprises the steps: obtaining liquid drop detection signals collected by multiple infrared receiving channels; performing signal conditioning processing on each path of liquid drop detection signal to obtain multiple paths of pulse signals; combining the multiple paths of pulse signals into a single-path effective pulse sequence by using redundancy decision logic; and calculating the real-time dripping speed according to the pulse frequency of the single-path effective pulse sequence. According to the scheme, the liquid drop detection signals of the multiple infrared receiving channels are collected in parallel, or operation merging is carried out on the multiple pulse signals through the redundancy judgment logic, effective recognition of liquid drop events can still be maintained when part of channel signals fail, and therefore the fault-tolerant capability and robustness of the detection process are improved.
Owner:ANJI JENSTON MEDICAL TECH CO LTD

Multi-signal detection method and system based on multi-phase filtering and STFT

The invention discloses a multi-signal detection method and system based on multi-phase filtering and STFT. The multi-signal detection method based on multi-phase filtering and STFT comprises the following steps: firstly, collecting a pulse signal; digital channelization processing is carried out on the multiple pulse signals; extraction speed reduction, orthogonal down-conversion and multi-phase filtering processing are carried out on the multiple pulse signals in sequence; and then short-time Fourier transform is carried out on the multiple pulse signals, time-frequency correlation is carried out on frequency points in a short-time Fourier spectrum by using saturated pulses so as to obtain PDW parameter information of center frequencies, pulse widths, bandwidths and arrival times of the multiple pulse signals, the sensitivity of signal detection is improved on the basis of low FPGA resource consumption, and the signal false alarm rate is reduced.
Owner:CHENGDU MENGSHENG DEFENSE TECH CO LTD

Thermal management in network switch

The invention relates to thermal management in a network switch. An apparatus includes an interface and a thermal management circuit (TMC). The interface is configured to receive a plurality of measurements of a plurality of temperatures measured in a plurality of locations of the electronic system, respectively. The TMC is configured to (a) convert the plurality of measurements into a plurality of pulse width modulation (PWM) parameters, (b) calculate one or more PWM signals based at least on the plurality of PWM parameters, and (c) control the plurality of temperatures by applying the one or more PWM signals to the one or more cooling devices.
Owner:MELLANOX TECHNOLOGIES LTD(IL)

Wrist blood pressure measuring device and method and storage medium

The invention discloses wrist blood pressure measuring equipment, a wrist blood pressure measuring method and a storage medium. The equipment comprises a pulse wave signal acquisition sensor, an air pressure sensor, a wrist strap and a processor, the pulse wave signal acquisition sensor is arranged on the wrist strap, and the pulse wave signal acquisition sensor is provided with a plurality of pulse wave signal acquisition channels; the air pressure sensor is arranged on the wrist strap; the processor is used for acquiring multiple pulse wave signals at different positions simultaneously acquired by the multiple pulse wave signal acquisition channels within a first time period; a first blood pressure measurement value is calculated based on the pulse wave signals, collected at the same time, of the multiple different positions; acquiring an air pressure signal acquired by an air pressure sensor in a first time period; calculating a second blood pressure measurement value based on the air pressure signal; and calculating the blood pressure measurement value of the measured object based on the first blood pressure measurement value and the second blood pressure measurement value. When the blood pressure is measured, the blood pressure measurement value of the measured object is calculated according to the first blood pressure measurement value and the second blood pressure measurement value, so that the blood pressure measurement precision is improved.
Owner:PEKING UNIV SHENZHEN GRADUATE SCHOOL

Communication compatibility control method, device, system and gateway

The invention provides a communication compatibility control method, device and system and a gateway, and belongs to the technical field of communication. The method is applied to a gateway and specifically comprises the following steps: when a main serial port arranged on the gateway cannot identify a communication electric signal sent by main equipment, sampling the communication electric signal transmitted on a receiving signal line of the main serial port through an interruption mechanism to obtain a plurality of level signals; according to a plurality of pulse widths corresponding to the plurality of level signals, determining a baud rate of the master device, and converting the plurality of level signals to obtain a target bit string; analyzing the target bit string to obtain a main serial port communication protocol and all byte data; and decoding all the byte data to obtain a character string, sending the character string to the slave device, and configuring the main serial port according to the baud rate of the main device and the communication protocol of the main serial port. According to the invention, automation of communication parameter configuration between the master device and the slave device can be realized through a gateway bridging mode.
Owner:SHANTOU UNIV

Gate drive circuits and display panels

The present application discloses a gate drive circuit and a display panel. The gate drive circuit includes a plurality of cascaded gate drive units. Each of the gate drive units includes a stage transmission signal selection circuit, a pull-up control circuit, a pulse number reduction circuit, a first inversion circuit, a first output stage and a second output stage, and can output a second gate control signal with a greater number of pulses and a first gate control signal with a less number of pulses.
Owner:WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD