91 results about "Recursive algorithms" patented technology

The invention discloses an intelligent document analysis method and system, the method is executed by the intelligent document analysis system, and the method comprises the following steps: carrying out layout analysis on a PDF page by adopting a deep learning model; merging the block list from bottom to top by adopting a recursive algorithm; carrying out balance optimization on the binary tree structure; and outputting a result of the processed binary tree structure by adopting a preorder traversal mode. Layout analysis is carried out by adopting a deep learning model, various complex typesetting formats such as multi-column layout, image-text mixed typesetting, tables, lists and the like can be effectively identified and processed, and semantically continuous text blocks are ensured to keep continuity in a tree structure through a tree structure optimization module; a global semantic error correction module is added to carry out global document semantic representation learning and carry out adaptive adjustment and error correction on a preliminary structure, so that deep ambiguity is eliminated, logic errors are repaired, and the consistency of a final analysis result and human reading logic on the semantic level is maximized.

The invention discloses an intelligent power prediction method considering dynamic load change, and relates to the technical field of power grid load prediction, and the method comprises the steps: collecting original load data, carrying out the preprocessing, constructing a VMD constraint optimization model, carrying out the four-stage improvement of optimization parameters through employing an improved dung beetle optimization algorithm, so as to generate IMF components, reconstructing the IMF component by calculating a sample entropy to obtain a low-frequency component and a high-frequency component; establishing a Kalman filtering state space model based on the low-frequency component, and decomposing the low-frequency component into a residual component and a pseudo trend component through a Kalman filtering recursive algorithm; external features are obtained, the high-frequency component, the residual component and the pseudo trend component are aligned and spliced with the external features, multi-component collaborative prediction is carried out through a local-global interactive attention mechanism, and a final load prediction result is obtained; and generating a power demand visualization chart based on the final load prediction result. And reliable decision support is provided for power dispatching and energy management.

The present invention discloses a program static analysis method and system based on LLVM, belonging to the technical field of computer program analysis. The technical problem to be solved is that the existing program analysis technologies have low accuracy, low efficiency and limited application scope in estimating program performance characteristics and memory reuse distance distribution. The method includes: converting a source file into an LLVM IR file with source-level debugging information; traversing modules, functions, basic blocks and instructions in the LLVM IR file to obtain static trace information of a target function; constructing a basic block-level control flow graph of the LLVM IR file and annotating relevant information; identifying and annotating loop information when traversing paths to obtain an execution path with loop annotations, replacing basic blocks in the execution path with corresponding memory access information, and generating a static memory trace with loop annotations; calculating the memory access reuse distance distribution through a recursive algorithm based on the static memory trace with loop annotations.

The invention provides a self-adaptive regulation and control method for a hydrogen production system based on real-time parameter feedback, and relates to the technical field of process control, the method comprises the following steps: collecting an input instruction signal and a controlled state variable signal of the hydrogen production system, and comparing a fluctuation energy index with a preset identification dead zone threshold; if the fluctuation energy index is lower than the identification dead zone threshold value, the current controller parameter is kept unchanged; if the fluctuation energy index is higher than the identification dead zone threshold value, activating an online parameter identification step; calculating a dynamic confidence interval of process model parameters; judging whether the process model parameters estimated in real time fall into the dynamic confidence interval or not; if the process model parameters fall into the dynamic confidence interval, converting the process model parameters estimated in real time into control parameters of a PID (Proportion Integration Differentiation) controller, and updating the control parameters into a control loop of the hydrogen production system; and if the process model parameter exceeds the dynamic confidence interval, resetting an internal state vector of the recursive algorithm in the online parameter identification step by using a boundary value.

The invention belongs to the technical field of industrial automation control, and relates to a seasoning filling PID parameter adaptive optimization control method and system. The method comprises the steps that the real-time temperature of fluid in a filling pipeline, the static pressure of a valve inlet, the instantaneous flow and a valve opening instruction are collected, and moving average filtering preprocessing is carried out; constructing a self-adaptive forgetting factor calculation model based on the viscosity-temperature characteristics, and calculating a current optimal forgetting factor according to the fluid temperature change rate, the flow prediction error and the fluctuation condition of the flow data; a recursive algorithm is used for identifying the system process gain online, and the proportional gain of a PID controller is calculated in real time according to the identified process gain and the ratio of the hydrostatic pressure to the standard reference pressure; and the gain is input into a controller, and a final valve opening instruction is generated in combination with integral and differential terms. According to the method, the dynamic adjustment of the algorithm memory length can be realized, the viscosity change can be quickly adapted, excessive filling and slow response are eliminated, and high-precision filling under complex working conditions is ensured.

The invention relates to the technical field of agricultural environmental engineering and control, and discloses an agricultural non-point source pollution multistage control planning system and method based on a discussion hall architecture, and the system comprises an organization-level module, an adaptation-level module, a coordination-level module, an operation control-level module, a controlled-level module, a comprehensive integration discussion hall module, and an open external interface module. The organization level uses deep learning and causal inference to generate a full-watershed strategy; the discussion hall module fuses expert experience conversion constraints and carries out case migration; the adaptation level utilizes a recursive algorithm to dynamically correct model parameters; the coordination level adopts a hybrid optimization algorithm to solve a multi-objective optimization problem; the operation control level is combined with a feedforward feedback mechanism to generate an instruction; the controlled level executes actions and collects feedback; and the interface module is responsible for security encryption and verification of data interaction. According to the method, the expert intelligence of the discussion hall and the five-level hierarchical architecture are fused, qualitative and quantitative combination and full-basin dynamic collaborative optimization are realized, and the management and control precision and the response speed are improved.

The present invention discloses a document intelligent parsing method and system, which is executed by a document intelligent parsing system. The method includes the following steps: using a deep learning model to perform layout analysis on PDF pages; using a recursive algorithm to merge the block lists from bottom to top; optimizing the balance of the binary tree structure; and outputting the result of the processed binary tree structure using a pre-order traversal method. By using a deep learning model to perform layout analysis, it is possible to effectively identify and process various complex typesetting formats such as multi-column layouts, mixed text and image layouts, tables, lists, etc., using a tree structure optimization module to ensure that semantically continuous text blocks also maintain continuity in the tree structure, and by adding a global semantic error correction module to perform global document semantic representation learning, adaptively adjust and correct the preliminary structure, thereby eliminating deep ambiguity, repairing logical errors, and maximizing the consistency of the final parsing result with human reading logic at the semantic level.

The invention discloses a low-orbit Doppler positioning method and device for dynamically weighting epochs based on an intelligent agent, and belongs to the technical field of satellite navigation positioning. According to the method, an initial position and an initial state covariance matrix of a receiver are determined based on an initial accumulation low-orbit non-cooperative signal of the receiver, an initial point location of a current epoch signal is determined when a new low-orbit non-cooperative signal is received so as to realize time frame synchronization, and a state characteristic of the current epoch signal is determined at least based on the initial point location. The state features at least comprise satellite features, epoch state features, signal state features and positioning state features, determining a weight of a current epoch signal based on the state features using a pre-training agent, and determining a real-time position of the receiver based on the current epoch signal and the weight of the current epoch signal using a recursive algorithm, according to the invention, adaptive empowerment based on the multi-dimensional features of the epoch signal is realized, the accuracy of the determined epoch signal weight is improved, and the positioning precision is improved.

The present invention discloses an automated integration method for IO signals based on a FADEC operating system. The method comprises the following steps: using Eclipse CDT to parse all structure variables in the As_interface.h file and store them in a linked list A; extracting valid information from each element in the linked list and storing the information in a new linked list B; using a recursive algorithm to convert linked list B into n syntax trees based on pre-defined structure variable names A0 to An-1 for signal interaction between the AS and the OS, with the root nodes of the syntax trees being A0 to An-1, respectively; performing a depth-first search on the generated n syntax trees to automatically generate all signal names; and generating an IO signal integration record file based on a pre-defined IO signal integration template. The method automatically converts nested structures into syntax trees, saving manual time. The method also performs a depth-first search on the syntax trees to automatically generate all IO signals, resulting in a concise and accurate method.

The invention relates to a monitoring data recursive calculation method and application thereof in a CCUS project. An estimation error used for describing the difference between an estimation value and a true value and a measurement error used for describing the difference between a measurement value and the true value are introduced; the comprehensive error is obtained by dividing the previous estimation error by the sum of the previous estimation error and the current measurement error; an initial estimation value and an initial estimation error are randomly given, then an initial comprehensive error is estimated, then a subsequent estimation value is calculated through a recursive algorithm, and the initial comprehensive error is updated to be used for calculation of the subsequent estimation value. After a plurality of rounds of measurement and calculation, an estimated value is closer to a real value, and all measurement data in the earlier stage does not need to be backtracked, so that the problems of a large amount of repeated redundancy and large error of monitoring data are effectively reduced; and the method provided by the invention is used for realizing carbon dioxide leakage monitoring in a CCUS project.

The application relates to a DAG-based hierarchical data storage and loading method, which comprises the following steps: step S1, constructing a DAG hierarchical data storage model and storing hierarchical data; step S2, traversing the data in the DAG hierarchical data storage model, loading the hierarchical data by using a depth-first recursive algorithm; and step S3, performing index extraction of information through a relationship link between hierarchical data. The application effectively solves the problem of hierarchical data storage and loading and has the advantages of high data storage efficiency and fast loading speed.

The embodiment of the invention provides a category and library table dependency relationship determination method and device, equipment, a medium and a product. The method comprises the following steps: for any data access layer bean in a target project, running a first execution code corresponding to the data access layer bean; according to an SQL statement generated during the operation of the first execution code and a method name for calling the SQL statement, determining a first dependency relationship between a method contained in the data access layer bean and library table information; for any control layer bean in the target project, detecting dependency classes of all hierarchies corresponding to the control layer bean through a recursive algorithm, and when the dependency classes are data access layers bean, determining methods included in the data access layers bean; and determining the dependency relationship between the classes and the library table information in the target project according to the dependency classes of all hierarchies corresponding to each control layer bean, the methods contained in the data access layer bean and the first dependency relationship corresponding to each data access layer bean, so that the overall efficiency of analysis can be improved, and the probability of misplacement missing and misplacement can be reduced.

The embodiment of the invention discloses a superconducting quantum chip wiring path optimization method and device based on an RDP algorithm. A specific embodiment of the method comprises the following steps: simplifying an initial wiring path in a superconducting quantum chip wiring diagram through an RDP recursive algorithm to obtain a simplified wiring path; carrying out collinear point identification on the simplified wiring path, and optimizing the simplified wiring path; for each line segment in the optimized wiring path, executing the following processing steps: in response to determining that a global minimum distance corresponding to the line segment is greater than or equal to a preset safety buffer distance, determining the line segment as a compliant line segment; and performing line segment safety verification on the optimized wiring path, and determining the optimized wiring path as a target optimized wiring path in response to the fact that the optimized wiring path passes the safety verification. According to the implementation mode, through iterative collinear point elimination, the curvature change rate smoothness of a wiring path is improved, and the requirement for low-impedance connection between superconducting quantum bits is met.

The invention discloses an emergency evacuation whole-course commanding and dispatching method based on a big data model, and relates to the technical field of emergency management, and the method comprises the steps: dividing an evacuation region into a plurality of dynamic grid units, distributing and calculating weights, building a hierarchical data processing model, forming a self-adaptive data flow, and carrying out the hierarchical extraction of the data flow through a weight recursive algorithm, the method comprises the following steps: generating a regional feature matrix, constructing a multi-dimensional evaluation index, carrying out combinatorial analysis on the evaluation index by using a deep reinforcement learning model, outputting a decision suggestion sequence, generating an optimal resource allocation scheme, dynamically partitioning a withdrawal region, formulating a withdrawal time sequence for each partition, and establishing a partition cooperation mechanism. Calculating an optimal withdrawal sequence among the partitions through a game theory model; and generating a scheduling instruction according to the partition cooperation mechanism, and performing real-time optimization on the scheduling instruction based on the withdrawal process feedback data. According to the invention, intelligent commanding and dispatching of the emergency evacuation process are realized, and the safety and efficiency of large-scale crowd evacuation are improved.

The invention provides a satellite hyperspectral channel selection method and device, and the method comprises the steps: calculating the drop rate of a value function corresponding to each satellite hyperspectral channel, and taking the channel with the maximum drop rate as a first selection channel; an alternative channel is screened through an included angle range of Jacobin vectors of an unselected channel and a selected channel after linear transformation, so that atmosphere information contained in the alternative channel is remarkably different from that contained in the selected channel; combining each alternative channel with the selected (n-1) channels, calculating the drop rate of the value function by using a recursion method, and taking the channel with the maximum drop rate as the nth selected channel; and calculating a weight inverse matrix after the combination of the selected n channels by using a recursive algorithm for selecting the next channel, and repeating the above process until n is equal to a preset value. According to the method, the maximum decline rate of the value function is used as a channel selection standard, the assimilation reliability and accuracy of the variational method are ensured, and due to the calculation complexity and the parallel function of O (n2), the method has high calculation efficiency.

An embodiment of the present invention discloses a method, device, equipment and computer program product for obtaining and identifying data lineage, which relates to the field of big data technology, and includes: obtaining a data lineage query instruction input by a user, where the data lineage query instruction contains the data to be queried; querying the data to be queried through a recursive algorithm to obtain associated data that has a dependency relationship with the data to be queried, where the dependency relationship includes a direct dependency relationship or an indirect dependency relationship; determining the data lineage of the data to be queried according to the associated data and the dependency relationship, and displaying the data lineage in a specified format. By using a recursive algorithm to obtain associated data that has a direct dependency relationship or an indirect dependency relationship with the data to be queried, it will not cause the lack of intermediate links when determining the data association relationship, so as to display a comprehensive data lineage according to the user's data query requirements.

The invention relates to the field of data processing, and provides a medical bed allocation method, device and equipment, and the method comprises the steps: building a house type combination mathematical model; according to the mathematical model, an asynchronous recursive algorithm is adopted to search the house type combination, and an initial house type combination is determined; receiving a filtering condition input by a user in real time, and performing dynamic real-time filtering on the initial house type combination according to the filtering condition; and generating a room type combination record according to the room type combination result meeting the filtering condition, and visually displaying the room type combination record. The problems that in the prior art, medical bed combination distribution calculation efficiency is low, and design constraints cannot be dynamically responded are solved, and efficient, real-time and interactive compliance bed scheme automatic generation and display are achieved.

The invention discloses a function enhancement method based on an activiti workflow engine, and the function enhancement method comprises the following steps: inheriting a DeFaultActivityBehaviorFactoryMappingConfiguer class, and carrying out the monitoring enhancement on the overall situation of the activiti; a core command mechanism of the Activiti is rewritten, so that the functions of randomly returning and randomly skipping the process which is not supported by the original are realized; a set of pluggable form construction factory mechanism is constructed; through an algorithm and data processing, a complex BPMN flow chart is converted into a linked list view which is easy to understand by business personnel, and future path prediction is provided; by customizing a multi-instance behavior of Activiti, real-time statistics of a passing number and a rejection number is added for a countersigning node, and countersigning judgment logic is realized. A future approval path prediction function based on an approval history linked list view and a recursive algorithm is realized, and understanding and decision support of business personnel on a process are remarkably improved.

Embodiments of the present invention disclose a method, system, computing device, and medium for identifying a lithium battery equivalent circuit model. The identification method includes determining a frequency-domain state equation based on a second-order RC equivalent circuit model of a lithium battery; determining a first set of intermediate parameters based on the internal resistance, polarization resistance, and polarization capacitance of the second-order RC equivalent circuit model of the lithium battery, and determining a second set of intermediate parameters based on the first set of intermediate parameters; determining a correspondence between the first set of intermediate parameters and the second set of intermediate parameters, as well as a correspondence between parameters in the second-order RC equivalent circuit model of the lithium battery and the first set of intermediate parameters, using a VFFLMRLS algorithm; calculating the second set of intermediate parameters using a recursive algorithm based on the VFFLMRLS algorithm and an error value of the open-circuit voltage; and determining the parameters of the second-order RC equivalent circuit model of the lithium battery based on the correspondence between the parameters. The VFFLMRLS algorithm is used to improve the computational accuracy and efficiency of the model identification method.

The present invention provides a satellite hyperspectral channel selection method and device, the method comprising: calculating the cost function descent rate corresponding to each satellite hyperspectral channel, and taking the channel with the largest descent rate as the first selected channel; screening the alternative channels through the angle range of the Jacobian vectors of the unselected channels and the selected channels after linear transformation, so that the atmospheric information contained in them is significantly different from that of the selected channels; combining each alternative channel with the selected n-1 channels, and calculating the cost function descent rate thereof by a recursive method, and taking the channel with the largest descent rate as the nth selected channel; calculating the weight inverse matrix after the combination of the selected n channels by a recursive algorithm, and selecting the next channel, and repeating the above process until n is equal to a preset value. The present invention uses the maximum cost function descent rate as the channel selection criterion to ensure the reliability and accuracy of the variational method assimilation, and O(n 2 )'s computational complexity and parallel functionality make the present invention have higher computational efficiency.

The invention discloses a method and a device for realizing reliability evaluation of an aero-engine, a double-framework model comprising a structural BN and a dependent BN is constructed based on a model framework such as BN, a recursive algorithm uses the condition independence of the BN to reduce the complexity to a pseudo polynomial level, and the calculation efficiency is remarkably improved. In addition, large deviation caused by a traditional independent hypothesis is avoided, and the evaluation precision is improved. According to the embodiment of the invention, any layered structure and cross-module dependence are supported, key risk path analysis can be output, and technical support is provided for efficient implementation of aero-engine design optimization, predictive maintenance and airworthiness certification.

The present invention provides an online remaining life assessment method for equipment considering dependent competing failure modes, relating to the technical field of equipment remaining life assessment. In the present invention, a joint one-step transition probability matrix Γ(r) is constructed for age and degradation state within the unit interval (r, r+1)τ. Based on the joint one-step transition probability matrix Γ(r), Γ(r+1),…, Γ(r+s-1), the probability R(s|r,i) that the equipment is reliable at age (r+s)τ is predicted. Based on the probability R(s|r,i), the remaining life increment #imgabs0# of the equipment at age (r+s)τ is calculated, and if #imgabs1##imgabs2# is less than a preset precision error ε, the algorithm is stopped and the final #imgabs4# is output as the online remaining life assessment result for the equipment. Because the degradation process is no longer limited to the Wiener process, the more practical Markov process is adopted, which has more universal application significance. The iterative recursive algorithm evaluates the average remaining life with dependent competing soft and hard faults. At the same time, the algorithm has small memory requirements and fast calculation speed, which meets the timeliness requirements of online health status assessment and management.

The application relates to a method, device and equipment for generating a query SQL based on hive metadata, the method comprising the following steps: obtaining metadata information, storing the metadata information to a preset mysql database after marking the metadata information, and obtaining initial metadata; determining field lists of different tables based on the initial metadata, connecting the field lists of different tables, generating a data table association relationship, storing the data table association relationship to a preset subject domain, storing the preset subject domain to the preset mysql database; obtaining a target data relationship in the data model, generating an SQL template for querying the target data relationship by using a recursive algorithm, and developing the SQL template by modification. The application solves the problem of low development efficiency caused by the fact that the data is extracted by means of a big data component due to the writing of a complex SQL statement, the relationship between metadata and data tables needs to be maintained, and an operator needs to write a complex SQL according to the relationship between tables.

The invention relates to the technical field of control engineering, and discloses a control system and method for high-temperature gas heating, and the system comprises a high-temperature gas heating physical entity, a sensing detection group, and an advanced control unit. The advanced control unit comprises the following modules which work cooperatively: a data acquisition and preprocessing module which is used for acquiring system output (a gas outlet temperature measurement value), control input and measurable disturbance data acquired by the sensing detection group, and constructing a data regression vector reflecting dynamic historical information of the system; through a dynamic characteristic matrix self-correction module, a dynamic characteristic matrix representing a system input and output mapping relation is constructed and updated in real time by using a recursive algorithm with a forgetting factor; the method effectively solves the problems of strong nonlinearity and time-varying characteristics caused by dramatic changes of gas physical properties and heating element characteristics along with temperature in a high-temperature gas heating process, and remarkably improves the adaptive capacity of the model in a full working condition range.

The invention discloses a selective aggregation and authentication method based on multi-type secret state data, and relates to the technical field of network and information security, and the method comprises the steps that each piece of Internet of Things equipment encrypts and signs obtained sensing data, and calculates and selects a secret key according to the data type of the sensing data; each second-level edge server verifies the selection key of each Internet of Things device according to the verification key of the second-level edge server so as to determine encrypted data conforming to the expected type of the second-level edge server, and primary aggregation is carried out through multiplication; the primary edge server carries out secondary aggregation on all the primary aggregation encrypted data and the primary aggregation signature data; and the central server verifies the secondary aggregation signature data, decrypts and recovers the secondary aggregation encrypted data when the verification succeeds, and determines an aggregation plaintext corresponding to each data type by using a recursive algorithm. According to the invention, efficient aggregation and authentication based on different data types can be realized.

The present invention provides a high-order Bezier curve automatic edge sealing method in three-dimensional printing. By extracting model edge points and calculating control points, a smooth Bezier curve edge sealing path is generated. The method involves denoising, calculating curve points using a recursive algorithm, extracting edge points and identifying the connection sequence, optimizing control points, planning and optimizing the path, and curing using laser or electron beam curing technology. During the process, a high-precision sensor monitors the edge sealing quality in real time and automatically adjusts imaging parameters to optimize the effect. The method improves the accuracy and surface quality of edge sealing, is suitable for printing complex models, and reduces material waste. A related computer program is stored in a medium for implementing the method.

The invention provides a ship-bridge collision detection method and system, computer equipment and a storage medium, and belongs to the field of bridge structure health monitoring and safety alarming, and the method comprises the steps: collecting the displacement response of a bridge structure key position under ship collision disturbance; the method comprises the following steps: firstly, expanding acquired response data in a frequency domain by using discrete wavelet transform, extracting a low-frequency approximate signal to carry out co-integration test to obtain a multi-scale co-integration equation, and carrying out online real-time estimation on a co-integration coefficient in each scale equation by using a Kalman filtering recursive algorithm; when the co-integration coefficient changes and exceeds a safety limit, automatic alarm is realized; alarm results of co-integration coefficients of multiple scales are synthesized, and when 75% of co-integration combined alarm is set to be exceeded, a ship and bridge collision alarm decision is made. According to the method, the Kalman filtering algorithm is combined, so that the change of the co-integration coefficient can be predicted on line, and the actual engineering requirements are met. On the basis, multi-scale wavelet decomposition and co-integration improve the robustness and precision of alarm, a plurality of alarm results are provided for comprehensive decision making, and scientific basis and technical support are provided for bridge structure health monitoring and accident prevention and control.

The invention belongs to the technical field of medical image processing, and relates to a three-dimensional image transformation method based on recursive enhancement. The method comprises the following steps: firstly, carrying out feature transformation on an input three-dimensional image by adopting a recursive algorithm, and dividing the image into a plurality of local cubes for processing; then, the side length and voxel pitch of the cube are gradually adjusted through an iteration process, image features are continuously updated, and the transformation efficiency is improved; finally, a group of transformed three-dimensional images are generated, and new information is provided for analysis and prediction of brain images. The method can be applied to the fields of brain classification, brain disease diagnosis and the like.

The invention discloses an unmanned aerial vehicle formation flight performance collaborative path planning method and system based on an artificial path potential energy field, and belongs to the technical field of collaborative path planning. The method comprises the steps of 1, extracting feature points of an image, and adjusting the number of the feature points to a target value by using a recursive algorithm; step 2, distributing pattern feature points for each unmanned aerial vehicle based on the target numerical value of the image obtained in the step 1; and step 3, based on the pattern feature points distributed in the step 2, performing cooperative path planning for the unmanned aerial vehicle group flying from the starting point to the ending point, and realizing unmanned aerial vehicle formation flight performance cooperative path planning based on the artificial path potential energy field. The method is used for solving the problems that an existing unmanned aerial vehicle formation collides during flight performance and the path length of the unmanned aerial vehicle reaching a specific position point is not optimal.

The application discloses a user residence point identification method and device, electronic equipment and storage medium. Target signaling is added to each user in first user signaling data obtained, and second user signaling data is obtained. The target signaling is signaling with maximum time stamp for start time and end time and invalid values for longitude and latitude. Recursive calculation is performed on the second user signaling data through a recursive algorithm. A plurality of residence segments corresponding to each user are identified according to a distance threshold and a time threshold. The signaling length of each signaling in each residence segment is used to assign a corresponding weight to each signaling, and the offset calibration residence point of each residence segment is calculated. Finally, the offset calibration residence point of each residence segment and the second user signaling data are judged through the recursive algorithm, and the corresponding residence point of the plurality of residence segments of each user is output. Thus, the accuracy of identifying the residence state of the user can be improved.