277 results about "Adaptive identification" patented technology

The invention provides an urban drainage pipe network monitoring data cleaning and intelligent prediction method, and the method comprises the steps: firstly obtaining pipe network monitoring data, and carrying out the classification tracking and repairing of missing values; adopting a dynamic IQR algorithm based on a sliding window to adaptively identify abnormal candidate points; secondly, introducing a pipe network topological relation, comparing upstream and downstream data change trends, eliminating non-physical anomalies caused by equipment faults, and reserving real hydraulic events; calculating the physical delay time between the nodes by using the cross correlation coefficient; and finally, constructing a random forest model, taking upstream historical data after delay alignment as feature input, and realizing accurate prediction of a future water level and quantification of a feature contribution degree. According to the method, a physical mechanism and machine learning are fused, the problems that data cleaning lacks adaptivity and a deep learning model lacks interpretability are effectively solved, and the accuracy of waterlogging early warning is improved.

The invention relates to a boiler combustion optimization control system of a thermal power plant, relates to the technical field of thermal power generation control, and aims to solve the problems of inaccurate multi-source data perception, slow control response and insufficient multi-target collaborative optimization capability under fire coal quality fluctuation and load change. The system comprises a data perception and fusion module, a working condition self-adaptive identification module, a multi-target dynamic optimization decision module and a distributed execution control module, and through multi-source data acquisition and feature extraction, depth time sequence mode identification, multi-target optimization model solving and distributed coordination control, the multi-target dynamic optimization decision module and the distributed execution control module are subjected to multi-source data fusion. Dynamic balance of boiler heat efficiency improvement and nitrogen oxide emission reduction is achieved, and adaptability and control precision of the system under complex working conditions are enhanced.

The invention relates to the technical field of remote sensing image processing, and discloses a remote sensing image adaptive identification method and system for territorial space planning, and the method comprises the steps: obtaining a multi-source remote sensing image data set of a research region, feature extraction, cloud detection, quality evaluation and adaptive preprocessing are carried out; carrying out prototype network coding, calculating a category prototype and probability, and supporting fine tuning of a set; carrying out multi-scale cavity convolution and category scale attention fusion; evaluating the adaptability score of the comprehensive fusion feature map set, and carrying out weighted fusion, classification and normalization; change detection is carried out, stable and change regions are segmented, and time sequence context features are extracted and constrained optimization is carried out; entropy is fused, a boundary is decided, uncertainty is estimated, and weighted fusion is carried out according to a change area; conditional random field optimization, confidence level grading and connected domain identification are carried out; the automation level, the adaptive capacity and the recognition reliability of remote sensing monitoring of territorial space planning are improved.

The invention discloses a power distribution network fault identification driving accurate isolation method based on an edge computing architecture, and relates to the technical field of power system automation, and the method comprises the following steps: S001, collecting voltage and current signals at each edge computing node of a power distribution network, analyzing the signal fluctuation amplitude and propagation time delay of different nodes based on the same fault event, and obtaining a fault event; and calculating a fault identification judgment difference degree between the nodes. According to the method, the identification credibility is quantified and abnormal node judgment is corrected through fault identification judgment difference analysis and topological constraint modeling; self-adaptive identification logic optimization is realized in combination with historical and real-time data; control priority and pre-simulation analysis are introduced, so that the feasibility and safety of the isolation action are improved; and finally, a closed-loop mechanism integrating recognition, simulation and feedback is constructed, and the fault response accuracy, coordination and operation stability of the power distribution network under a distributed architecture are remarkably improved.

The invention belongs to the technical field of hypersonic flight vehicle control, and relates to a rigid-elastic coupling-oriented active and passive integrated control method for a hypersonic flight vehicle. The invention aims to realize stable tracking control of the elastic hypersonic flight vehicle. The method comprises the following steps: constructing a longitudinal dynamic model of the elastic hypersonic aircraft; self-adaptive identification of the elastic vibration frequency is realized through a cascaded self-adaptive filter; an elastic modal filtering estimation method is designed, and high-precision and low-cost elastic modal state quantity is provided for subsequent active feedback controller design; and then rigid-elastic coupling model decomposition is carried out, the control performance is ensured by using active disturbance rejection passive control for a rigid body subsystem, an RBF neural network is introduced for an elastic subsystem, an elastic mode is actively inhibited by using sliding mode control, and stable tracking of a reference instruction is realized. The method is an active and passive integrated control method for the hypersonic flight vehicle oriented to rigid-elastic coupling, and the application prospect is wide.

The invention discloses a fault remote diagnosis and digital process maintenance method for water treatment equipment, and relates to the field of water treatment equipment operation and maintenance. The method comprises the steps of unifying time and semantics, generating a quality marking time sequence, and performing working condition benchmark and tracing; according to self-adaptive identification mechanism parameters, constructing a digital twinning and trusted domain, and comparing to obtain a residual error and anomaly in real time; forming root cause evidence and sorting under topology and energy and material closed constraints; generating scripts and rollback, gray scale issuing, sentry monitoring and transaction records through steady / transient simulation and constraint checking; and convergence, energy consumption, chemical dosing, water quality evaluation, precipitation versioning template recharging and closed-loop updating are carried out. Through unified working condition data and digital twinning mechanism-data fusion diagnosis, simulation-driven gray reversible execution and knowledge template recharging under quantitative evaluation, a traceable, reusable and migratable full-link remote diagnosis and process maintenance closed loop is constructed.

The invention relates to the technical field of data processing, in particular to a global unattended intelligent monitoring method based on multi-source data fusion, and the method comprises the steps: obtaining a real-time feature vector of a to-be-recognized target to obtain a global discrimination score; evaluating the category uncertainty of the target to be identified; according to the category uncertainty, a dynamic weight used for model fusion is generated in a self-adaptive mode; and obtaining a local discriminant by using a pre-trained local detail model, carrying out weighted fusion on the local discriminant and the global discriminant by using a dynamic weight to obtain a final discriminant, and determining the category of the to-be-recognized target based on the final discriminant, thereby realizing adaptive recognition of the unmanned aerial vehicle and the birds. Through the technical scheme of the invention, a nonlinear decision boundary of the unmanned aerial vehicle and birds can be effectively constructed, and the recognition accuracy of a fuzzy target in a complex scene is remarkably improved.

The invention discloses a self-adaptive grabbing force control system and method of a stamping line blanking manipulator, and relates to the technical field of self-adaptive control, and the method comprises the following steps: extracting a plurality of protection layer types corresponding to a plurality of process nodes; when a grabbing instruction is received, the protection layer type corresponding to the procedure node where the target workpiece is located is determined, and a mechanical arm grabbing strategy is called; the method comprises the steps of collecting a surface image of a target workpiece, recognizing the surface image, collecting protective layer characteristics of the target workpiece, inputting the protective layer characteristics into a manipulator grabbing force control model for self-adaptive recognition, outputting grabbing force control instruction parameters, and controlling a manipulator to execute a grabbing action and carry out force control feedback adjustment. According to the mechanical arm, the technical problems that in the prior art, when stamping workpieces with different protection layers are subjected to precise recognition and matched with proper grabbing force, grabbing is unstable, the workpieces are prone to being damaged or clamping fails are solved, and the technical effect that the mechanical arm precisely recognizes the workpieces with the different protection layers and dynamically controls and adjusts force is achieved.

The invention discloses a thinking cellular system construction method for simulating spatio-temporal evolution of industrial chain nodes, and relates to the technical field of brain network construction. Comprising the steps of obtaining a thinking cell vector space; obtaining a thinking cell state; obtaining an adjacent topological relation; establishing a logic evolution dynamic potential function; constructing a thinking cellular system according to the thinking cellular vector space, the thinking cellular state, the adjacency topological relation and the logic evolution dynamics potential function; and identifying the observed state and the hidden state of the industrial chain key node based on the thinking cellular system to obtain an identification result. According to the method, dynamic simulation is performed on spatio-temporal evolution of the industrial chain key node, the evolution path of the industrial chain key node state is explicitly expressed, the evolution rule is adjusted in real time to cope with environmental disturbance, adaptive identification and risk prediction of the industrial chain key node state are realized, and the external risk resistance of the industrial chain is improved.

The invention discloses a land space use control compliance intelligent identification and auxiliary determination system, and relates to the technical field of digital treatment. A data management module receives multi-source heterogeneous time sequence data to construct a dynamic graph structure substrate, and a probability scheduling module predicts global potential conflict probability by using a space-time graph neural network and performs calibration in combination with a historical conflict database; the graph enhancement module positions a key conflict path and a core node by reversely updating a conflict knowledge graph, and the reasoning execution module activates a rule engine to execute accurate matching in a region to be subjected to fine detection and outputs a deterministic conflict identifier; the fusion decision module finally fuses probabilistic prediction and rule judgment results to generate a mixed conflict list, and the feedback module sends the mixed conflict list to the execution terminal and optimizes the model based on feedback. According to the method, multi-level and self-adaptive identification of the land and space purpose conflict from wide-area prediction to accurate judgment is realized, and the supervision efficiency and the decision accuracy are improved.

The invention relates to the technical field of charging optimization, and discloses a multi-stage charging optimization method based on adaptive identification of a battery, and the method comprises the following steps: S101, in-situ detection and battery type identification; step S102, applying a current step and collecting a voltage response; s103, predicting the change of the terminal voltage along with time; step S104, determining a safe amplitude limiting current; step S105, determining a pre-deceleration factor; and step S106, judging full power, generating a quota recovery instruction, and returning to the step S104 for redistribution. Battery individual parameters are obtained through in-situ detection and micro-pulse identification, current quotas are dynamically distributed based on a constant voltage proportion, a safe target current is determined by combining voltage and power amplitude limiting, current distribution unbalance is avoided, the bus current utilization rate is maximized, voltage overshoot is inhibited by means of a first-order following strategy and a pre-deceleration factor, and the safety of a battery is improved. And stable switching is ensured by matching with constant-voltage inlet current clamping.

The invention provides a building outer wall facing layer hollowing defect monitoring device and a monitoring method thereof, and belongs to the technical field of building outer wall facade facing layer defect monitoring. The monitoring method comprises a temperature data acquisition process, a heat flow intelligent analysis process, a hollowing defect adaptive identification process, a temperature field dynamic optimization process, an environmental interference self-learning correction process, a multi-source data fusion diagnosis process, a defect trend prediction process, a visual interaction process and a resource intelligent distribution process. All the processes of the monitoring method are executed through a temperature collecting and processing end, and aiming at the problems of insufficient precision, large environmental interference, low intelligence, prediction deficiency and low resource efficiency in building outer wall facing layer hollowing defect detection, through a temperature sensor matrix, an intelligent data processing process and a multi-source data fusion design, the building outer wall facing layer hollowing defect monitoring method is provided. And the detection precision, the automation degree and the maintenance efficiency are obviously improved.

The invention discloses a multi-element mixed enhanced intelligence-based cross-material pavement disease adaptive identification method, relates to the technical field of road intelligent operation and maintenance, and solves the technical problems that the identification rate is suddenly reduced and the false detection and omission ratio is high in a cross-material scene due to the fact that a model is developed for a single material or a general model is used in the prior art. The method comprises the following steps: S1, constructing a cross-material pavement disease image sample library; s2, constructing a pavement disease identification visual large model; s3, constructing a pavement disease pixel-level integrated enhanced intelligent recognition model; and S4, inputting a to-be-detected image to the trained pavement disease identification visual large model and the pavement disease pixel-level integrated enhanced intelligent identification model respectively, obtaining fusion output according to the adjusted fusion weight, and finally realizing pavement disease multivariate hybrid enhanced intelligent identification. The method can be simultaneously suitable for disease identification tasks in various material environments such as asphalt pavements, cement pavements and composite material pavements, and high-precision intelligent identification in a cross-material scene is realized.

The invention discloses a multi-protocol compatible intelligent test method and system for a power distribution automation terminal, and relates to the technical field of power distribution terminal test. The method comprises the following steps: acquiring basic information and historical test data of a tested terminal; automatically identifying and matching a communication protocol through a multi-protocol adaptive identification model, and generating a protocol conformance test template; according to the template, executing signal injection and collecting real-time response data, and calculating a terminal response matching degree and a protocol analysis accuracy parameter; and inputting the parameters into the test result evaluation model, and outputting a test result. Comprising an information acquisition module, a protocol identification and template construction module, a test execution and data acquisition module and a test evaluation module. According to the invention, automatic identification, standardized testing and intelligent evaluation of the multi-protocol terminal are realized, the testing efficiency, consistency and accuracy are improved, and the method is suitable for testing and diagnosis of distribution automation terminals of different models.

The invention discloses an edge AI-based battery thermal runaway prediction method during transportation of an electric vehicle, and the method comprises the steps: collecting multi-dimensional parameters of a battery pack during transportation of the electric vehicle, and carrying out the data fusion; performing adaptive identification based on the fused data to obtain a current scene type; then, endowing scene adjustment weights to the temperature gradient analysis data; performing fusion processing on the scene adjustment weight and the voltage fluctuation monitoring data, and extracting internal resistance change detection data; when the internal resistance change detection data exceeds a preset threshold value, generating an abnormal indication signal, extracting a dynamic change mode of multi-dimensional parameter fusion, updating a weight parameter, and obtaining a real-time weight vector; performing matrix operation on the fused data according to the real-time weight vector to obtain a comprehensive risk feature vector; and inputting the comprehensive risk feature vector into a machine learning model, determining a real-time risk assessment level, and obtaining a thermal runaway prediction result. The prediction precision and real-time performance of the thermal runaway risk of the battery pack in a complex environment are remarkably improved.

The invention relates to the technical field of video acquisition, and discloses an unmanned aerial vehicle video acquisition system and method combined with artificial intelligence, and the system comprises a scene distribution modeling module, a causal decoupling module, a sparse reasoning module, an evidence fusion module and a parameter adjustment module. The system achieves the comprehensive effects of scene adaptive identification and resource dynamic allocation, feature generalization learning and detection robustness enhancement, calculation load intelligent regulation and control and abnormal information isolation, multi-scale evidence reliable fusion and parameter autonomous optimization. Aiming at the problem of unreasonable resource allocation caused by the fact that a fixed detection strategy in the background technology cannot adapt to scene change, the system adopts real-time statistical modeling and scene type recognition technologies to realize matching of detection resources and scene requirements, and a traditional detection model excessively depends on training data distribution to cause insufficient generalization ability.

The invention relates to the technical field of CIP cleaning, and discloses an adaptive pulse flow CIP cleaning control and energy efficiency optimization system, which comprises a data acquisition module, an intelligent decision and decision generation module, an execution and control module, a feedback and optimization module and a maintenance and management module, through a multi-mode flow field intelligent control and cleaning object self-adaption identification technology, various scenes of CIP cleaning can be comprehensively covered, conventional cleaning efficiency indexes are concerned, elements such as pipe diameter adaptability, dirt type pertinence and flow field mode adaptability are also included, the cooperation process of pulse parameters and a flow field is deeply optimized, and the cleaning efficiency is improved. The cleaning effect can be more accurately matched with real requirements of different cleaning objects, and a more scientific basis is provided for high efficiency and pertinence of industrial cleaning.

The invention relates to the technical field of intelligent sorting of decoration garbage, and discloses an automatic recognition system for recyclable components of decoration garbage based on multi-modal feature fusion. The system comprises a multi-modal data acquisition module, a cross-modal feature fusion module, a recyclable component discrimination module and a self-adaptive identification strategy optimization module. The multi-modal data acquisition module constructs a framework based on a sample library, synchronously acquires visible light images, near infrared spectrums and three-dimensional point cloud data and outputs a feature set; the cross-modal feature fusion module performs time domain, frequency domain and space dimension comparison on the feature set and a standard library to generate a hierarchical feature incidence matrix; the recoverable component discrimination module inputs the matrix into a spatial semantic analysis network, generates a spatial thermal distribution diagram in combination with spatial distribution parameters and position information, and locates an enrichment region; and the adaptive module configures parameters according to the parameters, starts multi-modal synchronous acquisition for a high-probability region, and applies a characteristic disturbance test to adjacent types of samples.

The invention discloses a fault diagnosis system for an aviation turboshaft engine, and relates to the technical field of fault diagnosis. An acquisition module acquires horizontal, vertical and axial vibration signals; the processing module is used for generating real-time feature vectors by introducing dynamic short-time Fourier transform, variational mode decomposition and singular value decomposition of an unfixed-width Gaussian window; the incremental diagnosis module calculates the matching degree between a real-time feature vector or a prediction feature vector and a known class through a dynamic expansion network, selects to belong to the known class or triggers an expansion mechanism according to an adaptive resonance theory, constructs joint loss by using a Bayesian learning framework after expansion, and performs Gaussian process modeling; loss is determined through Bayesian optimization, and network parameters are updated; the prediction module generates a prediction feature vector when there is no fault; the maintenance module sends or stores a maintenance scheme according to needs, self-adaptive recognition of known classes and new fault classes is achieved, the state can be pre-judged in advance, the operation safety of the engine is effectively guaranteed, and the maintenance cost is reduced.

Systems and methods for analyzing documents are provided herein. A plurality of documents and user input are received via a computing device. The user input includes hard coding of a subset of the plurality of documents, based on an identified subject or category. Instructions stored in memory are executed by a processor to generate an initial control set, analyze the initial control set to determine at least one seed set parameter, automatically code a first portion of the plurality of documents based on the initial control set and the seed set parameter associated with the identified subject or category, analyze the first portion of the plurality of documents by applying an adaptive identification cycle, and retrieve a second portion of the plurality of documents based on a result of the application of the adaptive identification cycle test on the first portion of the plurality of documents.

The invention relates to the technical field of information security, and discloses a method for analyzing risk information in public data based on multi-modal artificial intelligence, and the method comprises the steps: collecting multi-modal data, and carrying out the data preprocessing of the multi-modal data; extracting high-dimensional features of the preprocessed modal data; obtaining a confidence coefficient score of the high-dimensional feature of each modal data; inputting the modal availability vector and the confidence score into a multi-modal fusion model, and calculating an attention fusion weight; performing weighted fusion on the high-dimensional features of the modal data according to the attention fusion weight to generate multi-modal joint feature representation; based on the multi-modal joint feature representation, outputting a risk probability and a type label; and when the output risk probability exceeds a preset threshold value, generating a structured early warning event, and automatically pushing the structured early warning event to a subsequent processing system to trigger a linkage response. According to the method, the risk information in the public data is accurately, efficiently and adaptively identified and disposed, and the automation level and response efficiency of network security protection are effectively improved.

The invention provides an energy-saving optimization method and device for a thermal power auxiliary engine system, electronic equipment and a storage medium, relates to the technical field of data processing, and aims to realize multi-physical-scale and multi-time-scale state estimation of the thermal power auxiliary engine system by constructing a hybrid dynamic model fusing a mechanism model and a time sequence prediction model. Meanwhile, on-line self-adaptive identification and correction are carried out on key operation parameters in the hybrid dynamic model based on the state estimation result so as to track the performance change of the auxiliary machine equipment, and a collaborative optimization control strategy of the system is generated by using the corrected hybrid dynamic model and adopting a multi-target dynamic optimization algorithm under the condition that a preset operation constraint condition is met. And the collaborative optimization control strategy is converted into an executable control instruction through a hierarchical coordination control mechanism, and the executable control instruction is issued to a field controller of each auxiliary machine equipment, so that the problem of relatively large deviation of an optimization result effect caused by limited processing capacity of a thermal power auxiliary machine system under a dynamic working condition and difficulty in self-adaptive updating of model parameters can be solved.

The invention relates to the technical field of automatic control, and discloses a beverage sterile cold filling line adaptive PID closed-loop control system and a control method thereof, and the system comprises a process event perception and prediction module which is used for analyzing a production instruction into a process event containing future working condition change information; the event-based adaptive identification strategy module is used for dynamically adjusting a forgetting factor of an identification algorithm according to a process event and improving the identification sensitivity during working condition switching; the dynamic coupling factor online identification module is used for identifying a dynamic coupling factor matrix of the system in real time; and a predictive feedforward-feedback compound controller. According to the method, the problems of large overshoot and long stabilization time caused by parameter time varying and multivariable strong coupling in dynamic processes such as formula switching of a production line are solved, and the adaptive capacity, robustness and control precision of a control system are remarkably improved.

The invention discloses a time domain distance protection method and system combined with a control strategy and distributed capacitance current, and the method comprises the steps: employing negative sequence current to suppress the adaptability of a control strategy based on converters at two ends of a line in a double-end weak feed AC system, and recognizing the problems that negative sequence networks at two sides in a composite sequence network are open-circuited and a non-fault phase generates overvoltage; aiming at the identification problem, an MMC negative-sequence current suppression control strategy is improved into a negative-sequence voltage suppression and voltage reduction V / F cooperative control strategy; based on a cooperative control strategy, a transition resistance item in the distance protection equation is split into an equivalent transition resistance and equivalent transition inductance complex model, and a line pi-type equivalent model is adopted to deduce a fault differential equation; and solving a differential equation containing a fault distance through a least square method to realize high-precision fault positioning.

The invention relates to the technical field of motor control, and discloses an induction motor rotor time constant adaptive control method, system and device, and the method comprises the steps: determining a rotor time constant estimation value based on the reactive power deviation of a model reference adaptive system; determining a rotor resistance estimation value according to the rotor time constant estimation value and a rotor inductance parameter value obtained in real time; performing low-pass filtering on the rotor resistance estimation value to generate a filtering value; updating a rotor time constant feed-forward value based on the rotor inductance parameter value and the filtering value; and based on the rotor time constant feedforward value, optimizing a convergence process of the rotor time constant estimation value so as to perform indirect vector control of the induction motor. The method has the beneficial effect that the convergence speed and robustness of adaptive identification of the rotor time constant are improved.

Systems and methods for analyzing documents are provided herein. A plurality of documents and user input are received via a computing device. The user input includes hard coding of a subset of the plurality of documents, based on an identified subject or category. Instructions stored in memory are executed by a processor to generate an initial control set, analyze the initial control set to determine at least one seed set parameter, automatically code a first portion of the plurality of documents based on the initial control set and the seed set parameter associated with the identified subject or category, analyze the first portion of the plurality of documents by applying an adaptive identification cycle, and retrieve a second portion of the plurality of documents based on a result of the application of the adaptive identification cycle test on the first portion of the plurality of documents.

The invention relates to the technical field of shale identification, in particular to a shale gas sweet spot self-adaptive identification and optimization prediction method based on machine learning, which comprises the following steps of: identifying a reservoir physical property mutation interface in a well depth direction, and performing discontinuous layer section division based on a brittleness evolution trend, the discontinuous interval division is used for generating an unsteady reservoir unit set; a machine learning model with stage perception ability is constructed by introducing a jump type productivity criterion, a dessert score body with hierarchical constraint is output, and the dessert score body represents a productivity potential level and an activation probability of each reservoir unit; and correcting the dessert score body by using model residual feedback, and outputting a final dessert prediction map with unsteady features and interlayer differential expression ability. According to the method, the attention mechanism is introduced to enhance the recognition of the key productivity transition stage, so that the accurate prediction of the productivity response of the reservoir unit is realized.

The invention discloses a self-adaptive identification and dynamic drive loading method and device for a password keyboard of a self-service payment machine. According to the system, VID, PID, firmware version, SN number and instruction fingerprint four-dimensional features of a keyboard are captured in parallel through a hardware detection engine, model matching is completed by using a hash table of O (1) time complexity, and online feature collection and block chain evidence storage updating are started when matching fails; and then, dynamically loading the driving module signed by the TPM, and realizing zero-interruption hot injection of the key through a double-buffering mechanism. Compared with the prior art, plug-and-play adaptation of any USB / serial port password keyboard can be completed within one second, a secret key can be updated without restarting equipment, meanwhile, an instruction fingerprint verification and block chain trusted link is provided, the development and maintenance cost is remarkably reduced, the safety is improved, and the method is suitable for ATM, POS and various self-service payment terminals.

The invention discloses a self-adaptive identification and compensation method for friction nonlinear characteristics of a feeding system of a numerical control machine tool. According to the method, parameters of a LuGre friction model are initialized by collecting an actual position signal, an actual speed signal, an actual current signal and an instruction position signal of a feeding system; friction parameter self-adaptive identification is carried out based on motion state segments, coulomb friction parameters and viscous friction parameters are updated by adopting a least square method in a constant speed stage, and bristle rigidity parameters, bristle damping parameters and Stribeck speed parameters are updated by adopting an extended Kalman filter in an acceleration stage and a deceleration stage; generating a friction force estimation value according to the identified friction parameter, converting the friction force estimation value into a compensation current signal, and adding the compensation current signal to a servo driver current instruction after phase lead compensation. According to the method, the friction characteristic change can be adaptively identified on line, tracking errors and vibration caused by friction nonlinearity are effectively inhibited, and the machining precision and stability of the numerical control machine tool are improved.

The invention discloses a retired battery parameter identification method, and relates to the technical field of lithium ion battery management, and the method comprises the steps: carrying out the pulse charging and discharging test of a retired lithium ion battery, obtaining a relaxation voltage sequence, carrying out the smoothing preprocessing of the relaxation voltage sequence, constructing a candidate cut-off termination time set in a relaxation time interval, and carrying out the calculation of the candidate cut-off termination time set. And intercepting corresponding relaxation data for each truncation termination time, performing parameter fitting based on the second-order equivalent circuit model, calculating a root-mean-square error at each truncation termination time, and selecting a parameter group with the minimum error as a target equivalent circuit parameter. By selecting and modeling a data fitting interval as a root-mean-square error minimization problem, automatic adaptive identification of the equivalent circuit parameters of the decommissioned battery is realized, the difficulty of selecting an E point under a fixed window is solved, the robustness and physical consistency of a parameter identification result are improved, a model prediction error is remarkably reduced, and the generalization ability under multiple working conditions is improved.