43results about How to "Solve the coupling problem" patented technology

The invention relates to the technical field of fluid control, and discloses a fluid control intelligent adjusting method and system for a micro-fluidic chip, and the method comprises the steps: carrying out the data collection of a self-adaptive fluid controller, a micro-fluidic channel pressure sensor array, a temperature sensor array and a flow sensor array based on the micro-fluidic chip; obtaining real-time fluid parameter monitoring data; performing feature extraction to obtain a multi-dimensional fluid feature matrix; establishing a three-dimensional fluid model of the microfluidic channel, and solving to obtain flow field distribution data; inputting the flow field distribution data into a Kriging agent model, establishing a mapping model of channel width, depth, length and fluid control performance, and calculating to obtain an optimal geometric parameter combination; and performing multi-level calculation on the fluid pressure uniformity, the temperature distribution uniformity and the flow stability to obtain a hierarchical fluid parameter control strategy. According to the invention, the problem of multi-physics field coupling is effectively solved, the calculation complexity of the control system is reduced, and the execution efficiency of the control strategy is improved.

The invention relates to the technical field of data processing, and discloses an operation mode switching control method and device for an offshore wind turbine generator. The method comprises the following steps: carrying out model classification on historical operation data of a unit to obtain operation mode classification data and a characteristic parameter library; performing reinforcement learning analysis on the current state evaluation data and the short-term prediction data of the unit to obtain a target operation mode; performing fuzzy control processing on the target operation mode to obtain a mode switching strategy and a parameter adjustment sequence; performing multi-objective optimization and cooperative control analysis on the mode switching strategy and the parameter adjustment sequence to obtain accurate control signals of each actuator in the target offshore wind turbine generator; and generating an operation mode switching control strategy according to the accurate control signal of each actuator, and performing mode switching control on the target offshore wind turbine generator through the mode switching control strategy. According to the invention, the efficiency and accuracy of the operation mode switching control of the offshore wind turbine generator are improved.

The invention provides a control method and device for a network-forming type energy storage converter, and belongs to the field of energy storage converter control. The method comprises the following steps: acquiring three-phase current and three-phase voltage of a grid-connected point of a target network-building type energy storage converter; according to the three-phase current and the three-phase voltage, determining active output power, reactive output power, and resistance and reactance of a power grid to which the target network-forming type energy storage converter belongs; based on the resistance and the reactance, outer ring self-adaptive parameters are calculated; wherein the outer ring adaptive parameter is used for performing VSG control; and according to the outer-loop adaptive parameter, the three-phase current, the three-phase voltage, the active output power and the reactive output power, controlling the target network-forming type energy storage converter. According to the invention, the active control strategy and the reactive control strategy in VSG control are improved based on the outer-loop adaptive parameters, so that the problem of coupling between the damping coefficient and the primary frequency modulation coefficient is solved, and the situation that the control performance is reduced and unstable due to the change of the impedance of the power grid is avoided.

The invention discloses a SiC MMC sub-module capacitor voltage fluctuation suppression method and system, and belongs to the technical field of electronic power. According to the analysis result of the optimal broadband harmonic circulation injection boundary and number of times of the SiC MMC sub-module, a sub-module capacitor voltage fluctuation optimization model for simultaneously injecting second, fourth and eighth harmonic circulation and third harmonic voltage is determined, and the characteristic of higher control bandwidth of the SiC MMC can be fully utilized; by solving a submodule capacitor voltage fluctuation optimization model, the amplitudes and phases of reference values of second, fourth and eighth harmonic circulation needing to be injected and the amplitude and phase of corresponding third harmonic voltage are determined, then the second, fourth and eighth harmonic circulation is injected, and the third harmonic voltage injection is combined to realize broadband harmonic combined injection. The capacitance voltage fluctuation of the sub-module is reduced, the capacitance voltage fluctuation suppression method for the SiC MMC sub-module is realized, and the suppression effect is relatively high.

The invention relates to a wind-light-fire-storage coupled water electrolysis hydrogen production comprehensive energy system. The system comprises a wind-light power generation unit, a thermal power generation unit, an energy storage unit, a mixed hydrogen production unit, an air separation unit, an ammonia gas synthesis unit, a flue gas carbon capture unit, a methanol synthesis unit, an oxygen-enriched combustion unit and an ammonia-doped combustion unit. According to the wind-light-fire-storage coupled water electrolysis hydrogen production comprehensive energy system, wind-light-fire-storage integrated cooperative operation is achieved, hydrogen production, ammonia production and alcohol production processes are combined, peak regulation, frequency modulation and voltage regulation are facilitated, and the stability and safety of a power system are guaranteed. Power generation through renewable energy sources such as wind and light is combined with hydrogen production through water electrolysis, green hydrogen with economic cost can be produced, excessive wind and light resources are consumed, and the phenomenon of wind and light abandoning is reduced. The hybrid hydrogen production technology can effectively solve the problems of intermittency and volatility of wind and light and coupling between hydrogen production equipment, realizes flexible hydrogen production, improves the wind-light-electricity absorption efficiency, and enhances the overall stability of the system.

The invention discloses an inspection robot, and relates to the technical field of inspection equipment, the inspection robot comprises a chassis module, a holder, a mounting platform and a platform driving mechanism, the mounting platform can be rotatably arranged on the chassis module around a vertical shaft, and the driving mechanism can drive the mounting platform to rotate around the vertical shaft; the holder is connected to the mounting platform through a mechanical quick-release interface, and the holder can carry functional equipment. The mounting platform and the chassis module can rotate relative to each other, so that separation on the yaw axis freedom degree is realized, functional equipment such as a sensor carried by the holder can rotate relative to the chassis module, and the coupling problem is solved; and the convenience of replacing the functional part is improved.

The invention provides a message pushing method and device and a computer readable storage medium, and the method comprises the steps: receiving a target message which is sent by a business system in communication connection with a message pushing center and is used for being pushed to a designated client; then, a target push channel is determined from a plurality of message channels registered in the message push center by the specified client, the target push channel is used for pushing the target message to the specified client based on the target push channel, and the message is transmitted to the push center by introducing the message push center and the service center. Therefore, follow-up delivery of the message is not concerned any more, the problem of system coupling is solved, and service logic is clearer. Meanwhile, the plurality of message channels comprise an mqtt channel which communicates with the specified client through an mqtt protocol; by introducing the mqtt channel, the effect of using multiple terminals through one-time development is achieved, and manpower and financial resources consumed by repeated development are saved.

The invention discloses a three-degree-of-freedom macro-micro composite piezoelectric nano probe station, and relates to the technical field of semiconductor manufacturing and biotechnology. In order to solve the technical problems that in the prior art, an existing motor-driven probe station is large in cooperative control difficulty, the positioning precision and the stability are difficult to consider, the structure is complex, and the energy consumption is high, the technical scheme provided by the invention is that the three-degree-of-freedom macro-micro composite piezoelectric nano probe station is provided. Comprising a probe bench surface, an XY macro-motion mechanism, an XY micro-motion mechanism and a Z-direction mechanism. The XY macro-motion mechanism comprises an X piezoelectric motor and a Y piezoelectric motor which are used for achieving dozens of millimeter level horizontal movement in the X-axis direction and the Y-axis direction respectively. The XY micro-motion mechanism is used for realizing accurate movement of several nanometers to dozens of nanometers in the X-axis direction and the Y-axis direction; the Z-direction mechanism is used for realizing dozens of microns of lifting in the Z-axis direction; the probe bench surface is used for bearing a bearing object and is also used for driving the bearing object to move along the X-axis and Y-axis directions. The device is suitable for semiconductor manufacturing and biotechnology testing work.

The invention discloses a document data sending method and device, a storage medium and an electronic device. The method comprises the steps of obtaining document data obtained by monitoring a document directory of an application server; determining a target data conversion plug-in corresponding to the document type of the document data from preset data conversion plug-ins, and converting the format of the document data into a standardized format by using the target data conversion plug-in to obtain standardized document data; and determining a target data sending plug-in configured for the document data from preset data sending plug-ins, and sending the standardized document data to a receiving end configured for the document data by using the target data sending plug-in. By adopting the technical scheme, the technical problem of low sending efficiency of the document data is solved.

The invention provides a graph classification method based on a quantum graph attention network. The method comprises the following steps: step 1, converting graph data into a quantum state for quantum calculation through angle coding and amplitude coding; step 2, establishing a quantum linear mapper, and for a quantum state obtained by angle coding, using a group of alternative trainable parameter-containing quantum gates and CNOT gates to form a group of unitary gates # imgabs0 # to evolve the quantum state; 3, establishing a quantum graph attention layer, splicing the nodes in pairs when the attention coefficient between the nodes is calculated, and iteratively inputting the spliced nodes into the quantum graph attention layer; step 4, taking nodes with small influence on the target node as noise items and removing the noise items; and 5, image classification is carried out. According to the method, strict dependence on a graph structure is avoided, the processing requirement of large-scale graph data can be better met, the method is a universal circuit design method, and the processing efficiency and flexibility of the quantum graph neural network are remarkably improved.

The invention discloses a rotating speed flux linkage cascade robust control method and system for a permanent magnet motor system, and the method comprises the steps: firstly obtaining motor parameters of a permanent magnet motor, and then carrying out the observation of a system operation process through a composite discrete extended state observer; a rotating speed flux linkage cascade model-free predictive controller is built based on a super-local model, a lumped disturbance value estimated by the observer is input into the rotating speed flux linkage cascade model-free predictive controller, a q-axis flux linkage instruction value is output by a rotating speed ring through a given value and a response value, and a required dq-axis voltage instruction value is output by a flux linkage ring; and a pulse signal is generated to drive the permanent magnet motor after reverse Park conversion and an SVPWM modulation module. From a new angle of combination of inherent structure improvement of model predictive control and observer compensation, the problem of parameter mismatch of the permanent magnet motor system is solved, the dependence of the control system on a motor mathematical model is reduced, the influence caused by parameter perturbation and external disturbance is suppressed, and the control performance of the permanent magnet motor system is improved.

This invention discloses a live-line detection device and method for partial discharge in GIS (Gas Insulation System), relating to the field of live-line detection of power equipment. The equivalent capacitance between the primary and secondary windings of a current transformer coil is used as a pulse signal coupling channel. Two sets of pulse current signals within the high-voltage conductor of the GIS are acquired through these two pulse signal coupling channels. Then, the partial discharge voltage signal of a specified frequency is extracted through a pulse partial discharge detection circuit. The two extracted pulse signals are output to a differential mode comparison and acquisition module. This module compares the pulse signals input from the two channels, effectively eliminating interference signals. This invention simultaneously solves two problems in GIS live-line partial discharge pulse detection: pulse coupling and high-voltage side partial discharge interference during live operation. It achieves accurate detection of partial discharge during GIS operation, ensuring the safe and stable operation of GIS electrical equipment.

The invention discloses a high-speed heavy-load working condition bearing dynamic stiffness testing device and testing method, and relates to the field of bearing testing. The invention solves the problems that the existing bearing dynamic stiffness test technology and equipment only can load in a single direction, cannot simulate axial and radial composite loading, depends on contact transmission, is insufficient in heavy load bearing, lacks system vibration error suppression measures, and is poor in reliability. And the high-precision test requirement of the independent rolling bearing under the high-speed heavy-load composite working condition is difficult to meet. A shafting supporting module is arranged on the upper portion of a test bench support, a measuring module is located over the shafting supporting module, an axial loading module and a radial loading module apply axial force and radial force to a tested bearing respectively, and a driving module drives a supporting shaft and an inner ring of the tested bearing to rotate. Axial and radial composite loading under the high-speed heavy-load working condition can be achieved, axial and radial displacement can be monitored synchronously, system errors are reduced, and high-precision measurement of the dynamic stiffness of the bearing is achieved.

The invention discloses a flat field conversion system for a lobster eye lens, and belongs to the field of detection. The device comprises a light source, a lobster eye lens, a curved-surface optical fiber bundle, a relay lens group, a medium-wave infrared detector and a base. The lobster eye lens is used for receiving light projected by a detection object in a view field range. A light source is arranged at an edge field of view of a lobster eye lens, and the lobster eye lens, a curved optical fiber bundle, a relay lens group and a medium-wave infrared detector are coaxially fixed on a base in sequence from left to right. The lobster eye lens detects an object in an edge view field, medium-wave infrared light emitted by the object is converged on the front end face of the curved-surface optical fiber bundle through the lobster eye lens and performs primary imaging, and the curved-surface optical fiber bundle converts a bent image surface into a flat field and transmits the flat field to an object surface of the relay lens group. And the relay lens group transmits an image surface and performs cold diaphragm matching with the medium-wave infrared detector, so that the contradiction between a large view field and high resolution of the lobster eye lens is solved, and high-precision detection of the lobster eye system on a target at an edge view field is realized.

The utility model discloses an optical module PCB (printed circuit board) and optical device assembly coupling positioning tool, which relates to the technical field of optical module packaging and is realized by the following technical scheme: an XYZ three-axis manual displacement lifting sliding table is fixed on a bottom plate in a plug-in manner and is connected with a platform adapter plate and a sliding table adapter plate through screws; the L-shaped cantilever sliding table is buckled through a sunken step at the tail end of the sliding table adapter plate and is connected with the manual rotating sliding table in a sliding mode, and the manual rotating sliding table restrains the angle rotation controller provided with a semi-arc limiting body below a step body through the step body at the bottom of a rectangular body. The angle rotation controller is connected with an optical device grabbing positioner through a circumferential bolt, and the optical device grabbing positioner and a PCB positioning rack which is fixed on the bottom plate in an inserted mode below a cantilever of the optical device grabbing positioner form the coupling positioning tool for the optical module PCB and the optical device combination. According to the utility model, the relative position of the optical device and the PCB can be simply, efficiently and accurately positioned.

The present invention discloses a broadband dual-frequency fusion antenna array based on upright oscillators, including a reflector, a metal tube, a low-frequency antenna and a high-frequency antenna, wherein the low-frequency antenna and the high-frequency antenna are both vertically arranged above the reflector, and the high-frequency antenna is four and arranged around the low-frequency antenna and symmetrically about the central axis of the low-frequency antenna, and the metal tube is arranged on the reflector. The broadband base station antenna array enables base station antennas operating in different frequency bands to share an antenna radiation aperture, eliminate mutual interference, and realize the fusion of two base station antennas operating in the frequency bands of 690-960MHz and 1700-2700MHz.

This invention discloses a method for controlling the downward speed deviation of a hydraulic press slide, belonging to the field of hydraulic press control technology. The method first collects real-time signals of slide position, main cylinder pressure, and oil temperature, and calculates the speed deviation. When the speed deviation continuously exceeds the limit, the system automatically switches from basic PID control to adaptive fuzzy PID control mode. In this mode, the system comprehensively considers the speed deviation, its rate of change, and pressure signals, determines the dominant disturbance type online according to preset rules, and generates targeted compensation commands accordingly. Through a multi-disturbance coordination strategy, the commands are output in an orderly manner to actuators such as proportional valves, cooling valves, and hydraulic pumps. The system monitors the speed deviation in a closed loop, achieving automatic mode recovery or abnormal protection. This invention achieves accurate identification and dynamic compensation of multiple disturbances, significantly improving the control accuracy, anti-interference capability, and system intelligence level of the slide speed.

The application discloses a control system design method for space gravitational wave detection. The method first performs modeling on a problem domain of the control system, constructs a first mapping matrix from a functional requirement to a behavior element, performs decoupling verification on the first mapping matrix until the first mapping matrix is in a lower triangular structure. Then, modeling is performed on a solution domain of the control system, a second mapping matrix from the behavior element to a design parameter is constructed, and independence verification is performed on the second mapping matrix until the second mapping matrix is in a lower triangular structure. Finally, a composite equivalent mapping matrix of the two-level matrix is calculated, and is used for change management of the control system. The application can realize formalized design and quantitative evaluation of a strong coupling control system architecture, identify coupling problems in an early design stage, improve design iteration efficiency and change management accuracy, and is mainly applied to control system design for space gravitational wave detection, and can also be applied to design scenes of various high-coupling high-precision space control systems.

The present invention discloses a method for online synchronous identification of multiple parameters of a permanent magnet motor. By adopting two groups of discrete voltage equations at different times to construct a full-rank online multi-parameter identification model, the method realizes synchronous identification of multiple parameters. The method not only solves the problem of insufficient rank of the parameter identification model, but also avoids the parameter coupling problem in the step-by-step identification process. In addition, a forgetting factor function based on the inverse cotangent function is designed, and the size of the forgetting factor can be adaptively adjusted according to the error during the parameter identification process. In the case where a single parameter of the motor suddenly changes or multiple parameters suddenly change or change slowly at the same time, the method can realize synchronous identification of multiple parameters, with fast convergence speed and high identification accuracy, and has high anti-interference and robustness.

The application discloses a kind of low-speed fixed-wing unmanned aerial vehicle longitudinal controllable field and stability analysis method, comprising: determining the desired working range of angle of attack and track inclination state;Angle of attack and track inclination expected value are substituted into trim calculation, and the trim elevator deflection, trim airspeed and trim thrust are obtained;With angle of attack as horizontal axis, track inclination as vertical axis, the trim elevator deflection, trim airspeed and trim thrust are expressed in the form of contour distribution, and the full-state trim contour distribution diagram is obtained;Introduce aircraft performance constraints and control constraints in the full-state trim contour distribution diagram, and obtain the controllable field;Select the desired working point in the controllable field, calculate the speed, angle of attack trend in the neighborhood of the working point, obtain the speed angle of attack phase diagram, and judge the stability of the working point through the speed angle of attack phase diagram.The application is applied to the technical field of unmanned aerial vehicle, has the advantages of low complexity of trim solution, strong result display intuitiveness and high application analysis efficiency.

The embodiment of the invention provides a data packaging method and device and a storage medium, and the method comprises the steps: receiving a data request sent by a data requester, and determining a plurality of target data sources according to the data request; respectively determining target business micro-services to which the plurality of target data sources belong, and obtaining a topological structure between the target business micro-services; according to the topological structure, packaging services corresponding to the target business micro-services are called in sequence to obtain target data from the target business micro-services, the target data are packaged into a target data structure, and the packaging services corresponding to different target business micro-services are mutually isolated; and sending the target data structure to the data requester. The data requester can obtain the required data without docking different business micro-services; the packaging logics are independently executed through the packaging services corresponding to different business micro-services, and the packaging services are independently developed and run, so that the problems of packaging code coupling and environment coupling during running of the different business micro-services are solved.

This invention discloses a broadband impedance measurement device for high-voltage systems and a voltage regulation method for its sub-modules. Each sub-module of the device consists of a cascaded H-bridge and a floating DC / DC converter connected in series on the DC side. One end of the cascaded H-bridge is connected to the current of each phase of the high-voltage system, and the AC side of the cascaded H-bridges in each sub-module is cascaded. The other end of the cascaded H-bridge is connected to the floating DC / DC converter. One end of the floating DC / DC converter is connected to the cascaded H-bridge, and the other end is floating. The device of this invention controls the energy balance on the bus capacitor of the cascaded H-bridge connected to the DC / DC converter in real time, so that the DC bus voltage remains stable when implementing current injection functions at different frequencies, thereby improving the impedance measurement effect. Through three-phase active and reactive power control, the energy loss on the floating side of the high-frequency DC / DC converter is compensated, a certain voltage range is maintained, and the voltage regulation and balance control effect between phases within the sub-module is improved.

The present invention relates to the technical field of composite material gas cylinder detection, and discloses an ultrasonic scanning detection device for composite material gas cylinders, including a rectangular support and a gas cylinder, wherein a stainless steel water tank is fixedly arranged in the rectangular support, slides are fixedly installed on the tops of the front and rear sides of the rectangular support, sliding sleeves are slidably arranged on the two slides, movable arms are fixedly installed on the outer walls of the two sliding sleeves, and the two movable arms are movably arranged on the inner wall of the stainless steel water tank; the stainless steel water tank is filled with water, a part of the gas cylinder floats on the water surface, and a part is immersed in the water, and an ultrasonic sensor is located directly below the gas cylinder, so that the ultrasonic sensor and the gas cylinder can be detected by water coupling, which overcomes the coupling problem of probe contact method detection and improves coupling accuracy. The present invention is novel in design, simple in structure, and has the advantages of high probe coupling degree and high detection efficiency.

The invention relates to the technical field of proton exchange membrane fuel cells, and discloses a method for estimating nonlinear parameters of a proton exchange membrane fuel cell based on a preset time estimator. According to the method, the output form of an electrochemical model of the proton exchange membrane fuel cell is converted into a linear system model through filtering operation, and a strong nonlinear system is rewritten into a linear parameterization form; a decoupled linearization system is obtained by defining an auxiliary variable and a decoupling algorithm, and the problem of system parameter coupling is solved; finally, preset time convergence of unknown nonlinear parameters in the model is achieved through a preset time parameter estimation method, online and rapid estimation of the nonlinear parameters of the proton exchange membrane fuel cell is achieved in the process, and the estimation speed of the nonlinear parameters is greatly increased; on-line estimation of unknown nonlinear parameters of the proton exchange membrane fuel cell can be realized only through input-output signals of an on-line measurement system.

The present invention relates to a millimeter wave switchable MIMO antenna unit, comprising a top layer, a first metal layer, a second metal layer, a third metal layer, a fourth metal layer and a bottom layer arranged in sequence from top to bottom, and also having through holes penetrating the six metal layers and four blind holes; the top layer contains 11 radio frequency switching chip patches, adopts a three-layer multiplexing structure, the first metal layer is a ground layer, the second metal layer is a control signal layer, the third metal layer is a power layer, and the fourth metal layer is a ground layer. A millimeter wave switchable MIMO antenna array comprises antenna units as above arranged in a 1×32 linear array, the polarization mode adopts vertical polarization, and the center frequency is 38.5GHZ. Compared with the prior art, the present invention has the advantages of small coupling, high reliability, clear and compact structure, high switching frequency, low cost, and can fit actual large-scale antenna base stations.

The invention relates to the technical field of chip manufacturing, in particular to a flip photodiode and a manufacturing method thereof.The flip photodiode comprises an epitaxial wafer, a reflecting layer and a lens layer, and a P electrode and an N electrode are arranged on the epitaxial wafer; the lens layer receives an optical signal from the laser, the epitaxial wafer absorbs the optical signal to generate an electric signal, and the electric signal is transmitted through the P electrode and the N electrode; the reflecting layer reflects the optical signal, so that the epitaxial wafer repeatedly absorbs the optical signal; a lens layer is corroded on the back surface of an epitaxial wafer, so that an optical signal enters from the back surface of the photodiode, and the coupling problem of the photodiode with light entering from the back surface and a laser is solved; and on the other hand, the reflecting layer is arranged on the front surface of the photodiode, so that after the optical signal transmitted from the lens layer is absorbed by the epitaxial wafer, the remaining optical signal can be reflected back by the reflecting layer to be continuously absorbed, the thickness of the absorbing layer in the epitaxial wafer is reduced, and the response speed is improved under the condition that the responsivity of the photodiode is not influenced.

This invention provides a method and system for assessing the adaptability of a satellite to the mechanical environment during long-distance transportation after propellant loading, belonging to the field of spacecraft mechanical environment engineering technology. This method aims to solve the challenge of assessing the structural safety and leakage risk of propellant-loaded satellites during long-distance transportation under the coupling of static pressure stress within the propellant tank and dynamic stress during transport. The method includes: establishing a model of the satellite and packaging system; defining the transportation mechanical environment conditions; analyzing and calculating random vibration fatigue strength and impact strength, predicting propellant leakage rate, and conducting a comprehensive assessment. This method employs the mean stress correction theory and the quasi-static transformation method to solve the coupling problem of static and dynamic stresses in fatigue analysis and impact strength verification, respectively, and predicts leakage risk by comparing acceleration response with ground test data. This invention can comprehensively assess the safety of propellant-loaded satellite transportation and supports the optimization of spacecraft development processes.

The invention discloses an optimization method for maximizing the energy efficiency of an IRS-assisted downlink URLLC system, comprising: assisting in constructing a multi-input single-output URLLC system on an intelligent reflecting surface; constructing a system energy efficiency maximization problem model to obtain a non-convex optimization problem; based on parameter substitution and problem conversion, converting the integer constraints and fractional constraints of the original problem into an easily tractable form; solving the variable coupling problem by an alternating optimization method, converting the non-convex problem into a convex optimization problem by using an SCA iterative algorithm and an SDR technology, and solving the convex optimization problem by using a BCD algorithm; obtaining a suboptimal solution of the multi-input single-output URLLC system parameter based on the generated iterative optimization variable values ​​and using the BCD iterative algorithm, and in the process of obtaining the suboptimal solution, obtaining the maximum energy efficiency of a single antenna user and the optimal solution of the reliability constraint by iteration; proposing an alternating optimization method to solve the variable coupling problem, and converting the non-convex constraint into a convex constraint by using the SCA algorithm and the SDR technology; and solving the local optimal solution based on the BCD iterative algorithm.

The invention provides a coordinate system correction and unification method for a reflective full-polarization imaging system. The method comprises the following steps: acquiring a muller matrix of an anisotropic column scattering phantom model through the reflective full-polarization imaging system; secondly, judging the state of the photon coordinate system by using the positive and negative of the photon coordinate system mark P, and determining the photon coordinate system as a unified system or a non-unified system; then, judging the specific configuration of the coordinate system by combining the state of the photon coordinate system and the positive and negative of a space coordinate system mark S; and finally, adjusting and correcting the coordinate system to a unified system according to all solutions and mutual conversion relations of the Muller matrix about coordinate system transformation so as to realize accurate decoding of polarization information. The method is suitable for various imaging and measuring systems related to the reflective polarization modulation technology, such as a two-photon full-polarization imaging system, a polarization endoscope and a full-polarization biosensor, effectively solves the coupling problem of a space coordinate system and a photon coordinate system, and improves the credibility and accuracy of information extraction.

The application belongs to the field of magnetic resonance sounding signal noise filtering, and is a kind of magnetic resonance sounding signal extraction method based on intelligent optimization manifold learning, the parameter group of the local linear embedding manifold learning method is initialized, the genetic algorithm in the intelligent optimization algorithm is used, the signal-to-noise ratio is taken as the fitness function, and the parameter group in the local linear embedding manifold learning method is optimized, the local linear embedding manifold learning method uses the optimized parameter group to sequentially perform first processing and second processing on the magnetic resonance sounding signal, removes random noise, and obtains the final denoised magnetic resonance sounding signal. The application effectively retains the signal characteristics through the nonlinear dimension reduction of manifold learning, avoids the information loss caused by frequency band selection, maintains the local relationship between data points in the dimension reduction process, ensures that adjacent points in m-dimensional space remain adjacent in d-dimensional space, only compresses and filters noise, and realizes signal extraction.