29results about How to "Reduce implementation complexity" patented technology

The application discloses a bidirectional hill holding control method and device, a wheeled electric engineering vehicle and a storage medium, and relates to the technical field of vehicle control. The method comprises the following steps: when it is determined that the current vehicle is in a hill driving state according to first state information of the current vehicle, the slope value of the road where the current vehicle is located is determined; when it is determined that hill holding needs to be triggered according to second state information of the current vehicle, third state information of the current vehicle is acquired; the requested torque of the driving motor of the current vehicle is determined according to the third state information of the current vehicle and the slope value, and the driving motor is controlled to output the requested torque, so as to realize bidirectional hill holding. The technical scheme provided by the application can reduce the cost of identifying whether the vehicle is on a hill and the implementation complexity of bidirectional hill holding, and improves the experience of users using the wheeled electric engineering vehicle.

The application discloses a Spike-BP on-chip learning method and system based on a Ca-LIF neuron model and a processor, wherein a trainable linear leakage parameter and a positive and negative double-channel pulse transmitter mechanism based on calcium gating are adopted; for the Ca-LIF neuron model, a linear leakage operation can be realized only by subtraction, complex leakage compensation operations can be avoided when a gradient matrix is solved, hardware implementation complexity is reduced, a large amount of calculation resources of subsequent hardware design is saved, and the performance of pulse neural network training is improved.

The present application relates to air conditioner detection technical field, propose a kind of air conditioner electrolytic capacitor health on-line detection method and system, the air conditioner electrolytic capacitor health on-line detection method includes collecting the voltage ripple signal of DC-DC step-down converter output in air conditioner, and detects the zero-crossing time of first time through direct current average voltage in a switching cycle, obtains first zero-crossing time;At the switching on starting moment or switching off moment of switching cycle, single sampling is carried out to output voltage ripple signal, and sampling voltage value is obtained;According to the running state of DC-DC step-down converter, it is judged that DC-DC step-down converter is currently in continuous conduction mode or discontinuous conduction mode;Based on the judgment result, corresponding capacitor parameter calculation model is selected, and the capacitance value and equivalent series resistance of output capacitor are calculated;The capacitance value and equivalent series resistance calculated are compared with preset threshold value, and if exceed threshold value, then trigger capacitor health state early warning.

The invention relates to a scene-oriented multispectral and infrared bimodal camouflage figure decision-making system, and belongs to the technical field of multisource information perception and intelligent decision-making. The system comprises an unmanned aerial vehicle carrying platform, a bimodal imaging unit, a data processing and communication unit and a ground calculation and decision unit. The bimodal imaging unit synchronously acquires a target area image through an infrared camera and a spectrum camera; the data processing unit preprocesses and transmits the image; the ground calculation and decision-making unit comprises a data set construction module, a bimodal target detection module, an image registration module, a self-adaptive decision-making module and a decision-making fusion module. The system calculates a homography matrix based on the flight height to realize image registration, adaptively selects a decision path according to a light intensity parameter, and outputs a detection result through intersection-to-union ratio matching and weighted fusion. Through a system-level architecture and a formulation decision-making mechanism, the accuracy and robustness of camouflage figure detection in a complex environment are improved, and the method is suitable for unmanned aerial vehicle platform deployment.

The application discloses a kind of digital warm pump parameter calculation system and method without sensing, belong to parameter calculation technical field, its method specifically includes: obtaining the electric operating parameter in current control period and the inherent characteristic parameter of pump body, constructs pump end energy balance model, and inherent characteristic parameter is mapped as the dynamic pump characteristic surface corresponding to current speed, and the first virtual flow value and the first virtual lift value are obtained by inversion, and input pre-established warm pipe network digital impedance model, calculate to obtain second virtual lift value, and generate pipe network impedance correction according to the deviation between first virtual lift value and second virtual lift value, and the output parameter of warm pipe network digital impedance model is iterated and updated, and when deviation meets preset convergence condition, the parameter without sensing corresponding to current control period is output;The application reduces the influence of relevant interference fluctuation on parameter calculation without sensing, and reduces the interference of single sampling point anomaly or local calculation deviation on output parameter.

The invention relates to the field of wind power generation, in particular to a wind turbine generator yaw static error correction method and system based on a multi-beam laser radar. The method comprises the following steps: S1, scanning a wind field area in front of an impeller of a generator set through a multi-beam wind measurement laser radar mounted in a cabin of the wind turbine generator set to obtain parameter information of a plurality of spatial points; s2, performing fitting calculation on the parameter information system to obtain a fitting circle representing a horizontal wind vector of the wind field area, and solving the fitting circle to obtain a free flow wind direction; s3, the free flow wind direction is compared with the current cabin orientation, and a real-time static yaw error angle is obtained through calculation; generating a yaw control instruction according to a preset control strategy; s5, solving and calculating the fitting circle to obtain a transverse wind component, and correcting the yaw control instruction; according to the method, the control instruction is generated through the control strategy to drive the yaw system to perform dynamic compensation, so that the wind turbine generator can continuously maintain the optimal windward attitude, and the stability and long-term effectiveness of control are ensured.

The application discloses a service request processing method and device, electronic equipment and a storage medium. The method creates an independent counting unit for each time window, and destroys the counting unit associated with the target time window if the life cycle of the time window ends. In this way, the service requests of a preset type in each time window can be counted independently, and only the number of service requests of the preset type needs to be accumulated, without performing the complex and error-prone deduction operation in the conventional technology. On the one hand, since the data deduction operation is saved, the implementation complexity and performance overhead of the system are reduced, and the stability and reliability of the system are enhanced. On the other hand, in a high-concurrency environment, the system only needs to process the number accumulation process of the service requests of the preset type, reduces the competition for resources of the data accumulation and data deduction processes, and improves the accuracy of the counting result and the system state determination.

The application relates to a carry chain delay tuning method and device of a field programmable logic gate array, and belongs to the technical field of time-to-digital conversion. In view of the problem that the large time interval difference of each tap of the carry chain leads to poor linearity of measurement, a delay chain is constructed by cascading multiple-stage carry chain unit stages, the output of the previous stage is simultaneously guided to the first input end with a small delay and the second input end with a large delay of the next stage; calibration measurement is carried out by taking the full second delay path as an initial structure; according to the delay parameter, the input path of the time interval deviation over-limit tap is switched to the first delay path to form a mixed delay chain. The application improves the tap distribution uniformity by dynamically adjusting the path selection parameter and the multi-stage register output selection adjustment, and is mainly applied to a high-precision time-to-digital converter and a measurement test system.

The application discloses a fault detection device based on fast edge pulse frequency scanning, comprising: a digital code type generation module configured to generate a controllable square wave signal based on a preset fast edge pulse period; a delay line module configured to apply two different delay times to the controllable square wave signal to obtain two delay signals; a combination logic module configured to perform logic operation on the two delay signals to obtain a fast edge pulse signal; a signal shaping module configured to shape the fast edge pulse signal; a signal synthesis and distribution module for synthesizing the shaped signal; a collection and spectrum analysis module configured to obtain an input reference spectrum and an output spectrum; and an ADC data processing module configured to calculate a frequency response function based on the input reference spectrum and the output spectrum, and a host computer configured to obtain a fault condition of a measured system according to the spectrum result. The application effectively reduces the system hardware cost and implementation complexity while improving the frequency scanning capability.

This invention discloses a point cloud data correction method and related lidar, apparatus, program, and equipment. The method includes: determining the corrected field-of-view position information based on a pre-constructed temperature-distortion model, temperature data from the lidar receiving lens, and the field-of-view position information corresponding to the original measured point cloud data; and reconstructing three-dimensional point cloud data based on the corrected field-of-view position information and the point cloud data. This method enables real-time dynamic correction of the angle value of each laser ranging point during the online operation of the lidar. It eliminates nonlinear angle measurement errors introduced by temperature changes, especially the amplification of light rays at the edge of the field of view due to thermal expansion and contraction at large field-of-view angles, from the data source. It effectively suppresses the bending, twisting, or drifting of straight objects in the point cloud image at the edge of the field of view, thereby improving the point cloud output accuracy and coordinate reliability of the wide-angle blind-spot lidar under all temperature conditions.

The application discloses a light beam pointing stabilization method and system for free space optical communication of an airborne platform, and belongs to the technical field of free space optical communication, and comprises the following steps: acquiring error spectrum dominant band information based on light beam pointing error or tracking error characteristic quantities; constructing a directional shaping compensator based on the error spectrum dominant band information, and setting a shaping risk safety constraint mechanism; under the monitoring of the shaping risk safety constraint mechanism, combining the directional shaping compensator with a basic closed-loop controller to generate an actuator control quantity; outputting the actuator control quantity to correct the light beam pointing; wherein, in the process of executing the above combination step, when the shaping risk safety constraint mechanism monitors that a safety constraint triggering condition is met, a rollback action is performed on the directional shaping compensator, and the rollback action is released after a risk index returns to within a threshold value and a preset cooling time is met.

The application discloses a data processing method, device, equipment, medium and product, the method comprises the following steps: dividing the to-be-compressed data into fixed-bit-width symbols, and generating or updating a prior dictionary according to the symbol frequency of the to-be-compressed data; selecting a set number of symbols with the highest occurrence frequency from the prior dictionary as high-frequency symbols, and configuring an escape symbol, and constructing an encoding tree based on the high-frequency symbols and the escape symbol; encoding the to-be-compressed data according to the encoding tree, if the current symbol belongs to the high-frequency symbols, output the code word of the high-frequency symbol, otherwise, first output the code word of the escape symbol, and then output the fixed-bit-width binary representation of the current symbol, to obtain the target data after compression. The above technical features can support stream data processing while ensuring lossless compression, and can reduce the calculation overhead and implementation complexity by effectively utilizing the data distribution characteristics.

The application discloses a communication system based on an intelligent reflecting surface, and the system realizes wireless communication based on a D2D communication system, and the system comprises a UAV base station, cellular users, an intelligent reflecting surface comprising a plurality of reflecting elements, and a plurality of D2D user pairs; wherein a D2D user power allocation is expressed as a non-convex optimization problem; and the non-convex optimization problem is solved based on an SD3 algorithm. The application can learn the properties of the problem itself to improve the calculation efficiency, learn the common features of the problem in a training mode to directly deploy and test the trained model, and then with the aid of the parallel computing capability of a neural network, the model can give an optimization scheme in a very short time, and solve the large-dimension optimization problem of the D2D system assisted by the intelligent reflecting surface with a relatively low complexity.

The invention provides a multi-level power converter fault tolerance method, which comprises the following steps of: acquiring an output voltage, an inverter side current and a direct current side voltage, performing conversion, and performing PI modulation to obtain a modulation wave of a system; judging whether the system has a fault or not, and judging a specific fault-tolerant scheme according to the modulation degree of the modulation wave if the system has the fault; based on a fault-tolerant scheme, selecting an output state of a redundant vector of a non-fault phase; and based on the selected output state, generating a corresponding driving signal through carrier phase-shifting PWM (Pulse-Width Modulation). The multi-level hybrid topology can keep the same working state before and after the fault, the floating capacitor voltage and the direct current side capacitor voltage are stable, the fault response is rapid, the large-range fluctuation of the output voltage and the output current is avoided, the smooth switching of the working modes is ensured, and the fault tolerance of the system is improved.

The invention relates to a hybrid autonomous management method, program and device for an offshore heterogeneous unmanned cluster, and a storage medium, and belongs to the technical field of unmanned system cluster cooperative control. The system comprises an unmanned ship, an unmanned aerial vehicle and an underwater robot, nodes are divided into a core, an auxiliary core, a regional core and a common node according to physical and capability attributes, and a management module is arranged. The method comprises the following steps: electing a core node through random competition during initialization; during operation, distributed fault detection is performed through a heartbeat mechanism, and competition election or task takeover is triggered when nodes fail so as to realize rapid recovery; when the core nodes actively remove the nodes, the regional core nodes execute task migration and synchronization; node states are kept consistent with global synchronization through local updating and superior reporting. According to the method, adaptation of a framework and a physical platform is achieved, protocol lightweight is achieved, the method has the advantages of being flexible, extensible and high in robustness, and the real-time performance and the self-adaptive capacity of the offshore heterogeneous cluster in a complex environment are effectively improved.

The present application relates to the technical field of database, in particular to a database incremental DDL synchronization method and device based on CDC and extended event fusion, the present application breaks through the limitation that traditional CDC can only capture limited DDL operation by CDC and extended event fusion, realizes all types of DDL capture such as creation, deletion and structure modification of core objects such as table and index by combining extended event, does not need to rely on third-party tools and manual operation, and greatly reduces the implementation complexity and error risk.

The application discloses a kind of high-frequency frequency domain characteristics and time-domain waveform high-precision prediction method and system of electromagnetic equipment system, including steps: (1) cable, electromagnetic equipment winding is divided into cascaded multi-conductor minimum unit;(2) establish cable, electromagnetic equipment winding high-precision multi-conductor minimum circuit unit model;(3) finite element simulation calculation parasitic parameter, setting minimum circuit unit model parameter;(4) the transmission matrix calculation of minimum circuit unit, cable, electromagnetic equipment winding system;(5) according to the connection form of electromagnetic equipment winding end and high-frequency characteristic measurement, calculate high-frequency frequency domain characteristics;(6) the spectrum analysis of inverter output PWM voltage, predict high-frequency time-domain waveform.The application can quickly and accurately predict the high-frequency frequency domain and time-domain characteristics of electromagnetic equipment system at the design stage or online operation, which is of great significance for improving the reliability of electromagnetic equipment system driven by power electronic converter.

The application discloses an implementation method for reducing the density of a QC-LDPC code generation matrix, and comprises QC_LDPC code check matrix full rank condition generation matrix solving, QC-LDPC code check matrix non-full rank condition generation matrix solving and density optimization, and a QC_LDPC code encoding process. The application solves the problem of high density of the existing QC-LDPC code generation matrix and existence of optimization space.

This application relates to the field of compilers, and in particular to a method for dynamically allocating caller-saved register storage space. Applied to the register allocation stage, it includes the following steps: obtaining the set of caller-saved registers that need to be saved at the current call point; obtaining the required storage space size N for the current call point based on the set of caller-saved registers; allocating a contiguous storage space of size N for this call by adjusting the stack pointer before generating the save instruction; writing the values ​​of the caller-saved registers that need to be saved at the current call point into the contiguous storage space of size N; executing the function call instruction; after the function call returns, restoring the values ​​of each caller-saved register written in the contiguous storage space of size N to the corresponding caller-saved register; and restoring the stack pointer to release the contiguous storage space of size N. This invention can solve the problems of stack space waste, high complexity, and susceptibility to errors.

This invention relates to a method and system for defending against backdoor attacks in federated learning, belonging to the field of information security. The method first performs data preprocessing operations on the terminal before executing local training, converting the data from the time domain to the frequency domain and designing a low-pass filter to filter high-frequency signals introduced by backdoor samples. Second, malicious uploads and updates are detected on the server side, the cosine similarity between the pre-global model and the local model is calculated, and an appropriate threshold is set to filter maliciously uploaded local model updates. Finally, a global aggregation operation is performed on the remaining non-malicious uploads and updates to obtain an updated global model, and differential privacy technology is used to perturb the obtained global model. This invention fully considers the scenario where backdoor attacks occur in different locations, mitigating backdoor attacks in federated learning without affecting the model's performance on benign data, thus solving the problem of backdoor attack defense in federated learning.

The application discloses a single-frame velocity deblurring method and device of FMCW radar, and belongs to the technical field of radar signal processing, the method comprises the following steps: selecting a continuous linear frequency modulation signal transmitted by a transmitting antenna; performing 2DFFT processing on a received echo signal to calculate a blurred velocity estimation value; performing fast time dimension 1DFFT processing on the echo signal to calculate a plurality of distance estimation values; performing linear fitting on all the distance estimation values to obtain a curve slope, which is a target velocity estimation value; using the target velocity estimation value obtained by the curve slope, the blurred velocity estimation value obtained by 2DFFT processing and a maximum unblurred velocity to calculate a blurring multiple; and using the blurring multiple, the maximum unblurred velocity and the blurred velocity estimation value to calculate a real velocity of a target, so as to realize velocity deblurring. The application uses fast time dimension DFFT to perform velocity deblurring, without changing the working mode of the radar, and has small system operation amount and low calculation complexity.

The invention belongs to the field of discrete event system control, intelligent manufacturing and reinforcement learning, and discloses a state feedback control strategy generation method and system of a time delay Petri network system in a non-deterministic environment, and the method comprises the steps: constructing a time delay Petri network model containing controllable / uncontrollable transition and minimum transmission delay constraint, defining a time extension state formed by the identification and the enable transition residual delay; a two-stage random judgment mechanism is introduced, two types of non-deterministic factors of control execution errors and uncontrollable event preemption are modeled, and the state transition probability is deduced; a control problem is formalized into a Markov decision process, and a reward function with time consumption as a negative reward and deadlock and an ultra-long path as strong punishment is designed; and adopting a table type Q learning algorithm based on dynamic learning rate scheduling, iteratively updating an action value function in interaction with a simulation environment, and exporting a state feedback control strategy. The method can be widely deployed in discrete event system control scenes such as flexible manufacturing, logistics scheduling and multi-robot cooperation.

This application provides a method for constructing a virtual radius and its application. The method includes: constructing normal planes orthogonal to the tangent vectors of multiple centerline points on the arterial centerline based on the acquired arterial centerline; traversing multiple normal planes based on the acquired plaque segmentation results, and determining the normal plane containing plaques as candidate normal planes; determining a target stenotic region based on the multiple candidate normal planes; and constructing a virtual radius function based on the target stenotic region, wherein the virtual radius function is used to obtain the virtual radius corresponding to the target stenotic region. This application achieves a unified and stable definition of stenotic regions, solving the problem that existing technologies define stenotic lesions based on the narrowest point of a single point, which cannot completely characterize continuous stenotic lesions composed of single or multiple adjacent plaques.

This invention discloses an anti-spoofing interference processing method based on the rate of change of signal power, belonging to the field of digital information processing technology for land-based navigation system receivers. The method includes the following steps: the receiver captures navigation signals and calculates the pseudorange between the receiver and each base station; the position coordinates are calculated using a least squares algorithm based on the pseudorange; crucially, by comparing the rate of change of theoretical power with that of actual power, combined with the K-means algorithm, spoofing signals are identified and eliminated, ultimately achieving accurate positioning. This invention addresses the deficiency of blind spots in anti-spoofing interference methods based on absolute power detection. It eliminates blind spots during use and requires no hardware modification to existing receivers, ensuring the positioning accuracy and reliability of the navigation receiver and enhancing the system's anti-interference capability.

This invention discloses a method and system for processing transmit and receive data in an MSK spread spectrum system. The spread spectrum sequence d is obtained through a spread spectrum module. n The modulation sequence b is obtained through the BPSK modulation module. n The MSK modulated signal I-channel SigI is obtained through the MSK modulation module. n and Q road SigQ n The MSK signal demodulation module is used to obtain the demodulated D signal. k The despreading module is used to obtain the despreading soft information Ds. m The method and system described above further simplify the MSK spread spectrum system by obtaining the received information bits through the BPSK demodulation module. While ensuring the performance of the MSK spread spectrum system, the implementation complexity of the MSK spread spectrum system transceiver end is reduced by the phase interleaving change law of the IQ path.

The invention provides a vehicle-mounted network switching method and device, equipment and a storage medium. The method comprises the following steps: a vehicle-mounted terminal acquires and reports fusion state information used for indicating that a cross-border event occurs or is about to occur on a vehicle; the cloud control platform determines a target network operator from candidate network operators based on the information according to a multi-dimensional decision strategy; a network switching instruction is issued to the vehicle-mounted terminal; and the vehicle-mounted terminal responds to the instruction and executes operator configuration file switching operation of the embedded subscriber identity module so as to access a local network of the target network operator. The understanding is realized. The cross-border communication cost caused by dependence on international roaming of an attribution operator is systematically reduced, the vehicle-mounted service experience quality is improved by preferably selecting a local high-performance network, the potential service interruption risk is avoided, and intelligence and optimization of connection management of the Internet of Vehicles in a cross-border scene are realized.

This invention relates to the field of motor control technology, specifically to a method and system for mitigating open-circuit faults in a three-phase induction motor. The method includes: obtaining a speed setpoint and the actual speed to form a speed deviation; inputting the speed deviation into a composite speed controller in a closed-loop V / f control structure to generate a frequency adjustment quantity; determining a target frequency command based on the frequency adjustment quantity and pole number conversion relationship, and generating a stator voltage amplitude command under a constant V / f ratio; obtaining the synchronous electrical angle through integration and generating a modulation signal; performing pulse width modulation based on the modulation signal to drive the three-phase inverter to output three-phase drive voltage; and when a stator phase open circuit causes a double-frequency disturbance in the dq coordinate system, using a resonant adjustment branch for tracking compensation to reduce speed fluctuations and electromagnetic torque pulsation, maintaining continuous motor rotation. This invention solves the problem of high control system complexity in existing induction motors due to reliance on independent fault detection and complex fault-tolerant switching mechanisms.

The application provides a broadband light vector measurement method and device based on I / Q demodulation, which comprises the following steps: generating carrier-suppressed double-sideband linear frequency modulation light signals with fixed starting frequency difference as a measurement signal and a local oscillator signal respectively; passing the measurement signal through a light device to be measured to obtain a probe light signal; coherently mixing the probe light signal and the local oscillator signal through a 90-degree optical mixer, extracting I / Q two-way electrical signals through a balanced photodetector; constructing a complex signal to separate upper and lower sidebands and suppress mirror frequency interference, extracting fixed low-frequency components to obtain spectrum response information of the light device to be measured; obtaining the system's own spectrum response through a calibration process; eliminating the system response through complex division operation to obtain the amplitude response and phase response of the light device to be measured. The application can solve the spectrum aliasing problem in symmetrical double-sideband modulation without increasing the complexity of the system, expand the measurement bandwidth by one time, speed up the measurement, and does not need a wideband electrical amplitude and phase detector, effectively reducing the measurement cost.

The invention discloses a fault self-healing reconnection method based on SRIO communication between an FPGA and a DSP, and belongs to the technical field of high-speed serial communication and embedded system reliability. And starting a link monitoring module at the FPGA end, and carrying out joint monitoring on the port initialization state, the link initialization state, the port error state and the initialization timeout condition of the SRIO link. When it is detected that the link is interrupted or has an error or the DSP initialization completion mark is not received within the preset time, the FPGA generates a reset trigger signal and sends the reset trigger signal to the DSP, and the DSP is triggered to execute SRIO initialization again. And after the DSP finishes initialization, resetting the SRIO modules at the FPGA end through a conventional interface, so that the SRIO modules at the two ends recover a consistent initialization state, and automatic reconstruction of a link is realized. According to the invention, double-end cooperative reset is realized only through the existing interface, the problems of single-end reset and false normal of a link are effectively solved, and the circuit has the advantages of simple structure and high reliability.