33results about How to "Reduce the amount of real-time calculation" patented technology

An online composition based aircraft return route programming method comprises the following steps: 1, plotting the geographic information of a whole flight line or only a selected typical area, and storing the geographic information in an airborne computer; 2, obtaining the inertial navigation information of an aircraft in real time; 3, obtaining a real time graph; 4, determining the current flight position; 5, estimating the inertial navigation error, and utilizing the estimated inertial navigation error to correct the navigation parameter of the aircraft; 6, storing the information-fused aircraft position information obtained in step 5 in the geographic information of the airborne computer according to a preset rule by the airborne computer in the aircraft flight process, and carrying out online composition of the information-fused aircraft position information; and 7, carrying out real-time track programming according to the online composition result and the task characteristic of the aircraft in the aircraft return process to complete flight guiding.

The invention discloses an optimal two-vector combination-based model predictive control method and system. The method is applied to a permanent-magnet synchronous motor control system driven by a three-phase two-level inverter. A model predictive current control strategy is adopted, all two-vector combinations and resultant vector sets obtained under action time are considered at the same time, and a cost function is inspected and an optimal resultant vector is selected from all to-be-selected sets. In order to simplify the optimization process, an equivalent voltage equation is given, a sector transformation method is provided and to-be-selected two-vector combination sets are transformed into multiple fixed line segments; and a fast algorithm is given and partial complicated calculation is transformed to offline execution, so that the real-time calculated amount of the novel method is effectively reduced. The model predictive control method disclosed by the invention is simple in structure, small in real-time calculated amount and easy to implement; and the response speed of a motor is high, current ripples and distortion are small, the switching frequency is low and the dynamic and static performance of the system is excellent.

The invention discloses an open-cast mining GPS truck intelligent dispatching system and belongs to the technical field of open-cast mining digitizing mining. The open-cast mining GPS truck intelligent dispatching system comprises an intelligent terminal, a wireless communication system, a 100M network communication system, a GPS, a system general control server, a UPS, an electronic map system, a dispatching management system, a centralized control system, a core module and a network reporting system. The whole process of loading, conveying and unloading is controlled and managed by the open-cast mining GPS truck intelligent dispatching system through a computer and reasonable configuration and application of various production resources are achieved automatically, so that the purpose of intelligent truck dispatch with the highest efficiency, the lowest consumption and the largest output is achieved. Enhancement of production organization, intensification of stope management, improvement of production and adaptation of capacity change are further accelerated. Device management is strengthened, device guaranteeing capacity is improved, enterprise management is strengthened, management improvement is accelerated, improvement of production efficiency is achieved, production cost is reduced, a management level and a decision-making level are improved, and the open-cast mining GPS truck intelligent dispatching system lays the foundation for a digital mine.

The invention provides a human bod motion animation generating method of a two-dimensional virtual figure. The human body motion animation generating method comprises the steps of shooting a real person motion video; extracting an initial frame image of the video; detecting the angular point of the initial frame image; calculating a sparse characteristic point light stream frame by frame; calculating 2D grid deformation; calculating a modal grid and a weight sequence; editing the modal grid and the weight sequence; using an isomorphic 2d grid to conduct animation rendering on the virtual figure. According to the technical scheme, compared with a purely manually made animation, since motions come from the real person video, the animation is more vivid, and particularly, it is very difficultto achieve the authenticity of the deformation and the rhythm randomness of the motions through a manual method; the 2d figure has a certain stereoscopic effect, the animation effect can be adjustedaccording to requirements through manual modification simply with the isomorphic grid, the same motion data can adapt to different figures of different body types, different skins, different clothes and different icons, and when the animation is applied, the real-time calculation amount is small.

The invention discloses a method for displaying a real-time shadow in virtual reality. The method comprises the following steps: key time points are selected according to illumination change of a scene; shadow values are calculated for the key time points, a shadow map is obtained, and frames containing the shadow map are taken as key frames corresponding to the key time points; the current time point is determined when the real-time shadow is displayed, two key frames corresponding to the two key time points before and after the current time point are read, interpolating calculation is performed on the shadow map in the two key frames, and the real-time shadow map of the frame corresponding to the current time point is obtained, wherein an interpolation for the interpolating calculation is determined according to the interval between the current time point and the key time points before and after the current time point. Consumption of computing resources is reduced while the real-time shadow effect can be realized.

The invention relates to a simulation method of a double four-quadrant converter. The double four-quadrant converter comprises a converter and a middle circuit, wherein the converter consists of four parallel branch circuits. The method comprises the following steps of: constructing a corresponding state equation according to different conducting states of switch elements in the four-quadrant converter; constructing a state equation judging module of a simulation model of the double four-quadrant converter by using a Simulink module; constructing an adams resolving module of the simulation model of the double four-quadrant converter by using the Simulink module; and performing simulation calculation by using the double four-quadrant converter. A modeling method has an intuitional principle, simple implementation steps, small real-time calculated amount and more correct and quick simulation, is easy to understand and is beneficial to instantaneity of simulation, and the convergence during zero pulse is effectively ensured.

The invention discloses an automatic placement method for building annotations in a three-dimensional scene. According to the method, a candidate annotation set containing fixed-orientation annotations and dynamic-orientation annotations is constructed for each building model in a preprocessing stage according to geometric morphological characteristics of a three-dimensional building, and optimalannotations are screened according to an annotation evaluation algorithm related to viewpoints in an interactive browsing stage. And when the annotations are projected to the screen space conflict processing, the annotations are sequentially placed by adopting a greedy algorithm according to the global priorities of the annotations. Compared with the prior art, the method has the advantages that the real-time calculation amount is small, the dynamic change of the visual angle, the visual range and the visibility can be adapted, and the relevance between annotations and building elements is effectively kept. Besides, the annotations are sequentially placed according to the priority order through the greedy algorithm, the annotations which are close to the viewpoint, low in conflict degree and high in building significance can be reserved while screen space annotation conflicts are efficiently processed, and the readability of global annotations is improved.

The embodiment of the invention provides a video signal processing method and device and a storage medium, and the method comprises the steps: carrying out the preset processing of a to-be-processed video signal in an original format, and obtaining a first linear RGB signal; obtaining a target pixel value corresponding to a pixel value of each pixel point in the first linear RGB signal according to a preset mapping table, and obtaining a second linear RGB signal according to the target pixel value, wherein the mapping table comprises a mapping relation between the pixel value based on the original format and the pixel value based on the target format; and performing inverse processing opposite to the preset processing on the second linear RGB signal to obtain a target video signal in a target format. According to the technical scheme, the mapping table is created in advance, in the process of converting the to-be-processed video signal from the original format to the target format, the real-time calculation amount is small, the processing time of the video signal is short, and the real-time conversion effect can be achieved.

The invention belongs to the field of power transmission line maintenance, and particularly relates to a method for determining the division number of visual alarm regions of a power transmission linechannel, which comprises the following steps of: a, performing offline training on a model based on visual alarm data of the power transmission line channel to obtain a suggested value; b, determining a determination value of the power transmission line channel visual alarm area division number through online decision. According to the method, the division number of the visual alarm regions of the power transmission line channel can be automatically determined, the visual alarm high-incidence regions of the power transmission line channel are identified based on the determined value, the coverage radius of the found visual alarm high-incidence regions conforms to the inspection radius of power transmission line maintainers, and convenience is brought to the power transmission line maintainers.

The invention discloses a geomagnetic indoor positioning method based on a gated recurrent neural network and particle filtering. According to the method of the invention, the gated recurrent neural network is trained through a built geomagnetic indoor database to perform matching and positioning of geomagnetic track signals;the trained gated recurrent neural network is used for matching and positioning, so that better positioning precision can be brought to matching and positioning of the geomagnetic track signals. Compared with a common geomagnetic track signal matching algorithm based on dynamic time planning, the trained model reduces the real-time calculation amount in the matching and positioning process. According to the method of the invention, a system for performing real-time positioning is designed while a particle filtering algorithm is adopted on the basis of performing matching and positioning on the geomagnetic track signals by the neural network model. According to the system, the advantage of extracting geomagnetic track signal features by the gated recurrent neural network is effectively utilized, and better real-time positioning precision is brought to the particle filtering algorithm.

The invention relates to a simulation method for a single four-quadrant converter, which comprises a converter and an intermediate circuit, wherein the converter consists of four branch circuits which are connected in parallel. The method comprises the following steps of: constructing corresponding state equations according to different conducting states of each switch element in the four-quadrant converter; constructing a state equation judgment module of a simulation model of the single four-quadrant converter by adopting a Simulink module; constructing an adams resolving module of the simulation model of the single four-quadrant converter by adopting the Simulink module; and performing simulation calculation by utilizing the simulation model of the single four-quadrant converter. The modeling method of the invention has visual principle, simple realization step, small real-time calculated amount and accurate and quick simulation, is easy to understand, is favorable for the instantaneity of the simulation, and effectively ensures the convergence during zero pulse.

The invention relates to a page generation method and device, equipment and a storage medium. The method comprises the steps: determining picture dominant hue information based on a target picture in a to-be-displayed page; determining a target background color based on a color distance between the picture dominant hue information and each piece of candidate background color information, wherein a plurality of pieces of candidate background color information are provided; and generating a to-be-displayed page based on the target background color. According to the embodiment of the invention, the visual coordination between the page background color and the content information in the to-be-displayed page can be ensured, the real-time calculation amount for determining the target background color is reduced, and the determination efficiency of the target background color is improved, so that the universality of generating the to-be-displayed multi-color page is improved.

The invention discloses a method for implementing CIM (common information model) system development by combining BIM (building information modeling) and GIS (geographic information system) technologies. City-level standardized coding is applied in the design stage of a BIM model, data containing GIS information is coded into the BIM model, and model component set information is uploaded to various data storage interfaces on an online storage platform through a network in a data analysis mode when the BIM model is delivered. The information is stored in a database storage mode according to the unique identifier of the BIM model, GIS grid coordinates and other information in different regions and types, and meanwhile, a query service interface is provided for a GIS software system. The engineering data obtained by splitting is stored in a classified manner by using a database method, and can be provided for a third-party CIM system to carry out engineering visual presentation and data reutilization based on geographic position information, so that the technical barrier between the GIS and the BIM is broken through, and the technical threshold of the industry is reduced.

An online composition based aircraft return route programming method comprises the following steps: 1, plotting the geographic information of a whole flight line or only a selected typical area, and storing the geographic information in an airborne computer; 2, obtaining the inertial navigation information of an aircraft in real time; 3, obtaining a real time graph; 4, determining the current flight position; 5, estimating the inertial navigation error, and utilizing the estimated inertial navigation error to correct the navigation parameter of the aircraft; 6, storing the information-fused aircraft position information obtained in step 5 in the geographic information of the airborne computer according to a preset rule by the airborne computer in the aircraft flight process, and carrying out online composition of the information-fused aircraft position information; and 7, carrying out real-time track programming according to the online composition result and the task characteristic of the aircraft in the aircraft return process to complete flight guiding.

The invention provides a train axle box bearing health state early warning method and system. The method comprises the steps that at least two characteristic parameters of m axle box bearings in the same train are collected in real time, and m is a positive integer; calculating a characteristic index of at least one characteristic parameter of each axle box bearing; respectively calculating a mean value of all feature indexes and / or feature parameters at the current moment; calculating a deviation value of each characteristic index and / or characteristic parameter of each axle box bearing at the current moment according to the mean value; judging whether the deviation value of the characteristic index and / or the characteristic parameter of each axle box bearing exceeds the deviation threshold value of the corresponding characteristic index or the characteristic parameter or not; if a certain axle box bearing exceeds the characteristic index of the deviation threshold value and / or the variety number of the characteristic parameters reaches a preset value, health early warning is sent to the axle box bearing. The method effectively solves the problem that accurate early warning of the train axle box bearing health state is difficult.

A method for generating human action animation of a two-dimensional virtual image, which is characterized in that the method comprises: shooting a live action video; extracting an initial frame image of the video; performing corner detection on the initial frame image; calculating sparse feature point optical flow frame by frame; Mesh deformation; calculation of modal meshes and weight sequences; editing of modal meshes and weight sequences; animation rendering of avatars using isomorphic 2d meshes. Compared with purely manual animations, this technical solution is more vivid and lifelike because the actions come from live videos, especially the authenticity of the deformation and the randomness of the rhythm of the actions, which are difficult to achieve by manual methods; and the 2D image has a certain three-dimensional effect. , the animation effect can be adjusted by manual modification according to the needs. Only the same configuration grid is required. The same set of motion data can be adapted to different images of different body shapes, different skins, different clothing, and different avatars. When animation is applied, the real-time calculation amount Small.

The invention provides a system and a method for online recognition of road unevenness. The system comprises a power source module, an acceleration sensing system, a vehicle speed information collecting system, a signal preprocessing module and a road unevenness calculating module. The method includes that road tests are performed on a sample vehicle on two roads different in grade, a linear relation between a quotient of an unsprung mass vertical acceleration mean square value of the vehicle model and vehicle speed and a road unevenness coefficient is demarcated; when the vehicle travels, each unsprung mass vertical acceleration of the vehicle and vehicle traveling speed information are collected; the collected information is compared with a demarcation result of the sample vehicle of the vehicle model, and current road unevenness can be acquired in real time. Compared with current similar technology, the system has the advantages of high transportability, quickness in operation and the like, and is nonsensitive to stiffness damping coefficient change of a suspension and especially suitable for active and semi-active suspension control systems variable in stiffness damping, and robustness of the system can be guaranteed.

The invention discloses a geomagnetic indoor positioning method based on a gated cyclic neural network and a particle filter. In the invention, the geomagnetic indoor database is trained to perform the matching and positioning of the geomagnetic track signal by training the gated cyclic neural network. Using a well-trained gated recurrent neural network for matching and positioning can bring better positioning accuracy to the matching and positioning of geomagnetic trajectory signals. In addition, compared with the commonly used geomagnetic trajectory signal matching algorithm based on dynamic time planning, the trained model The amount of real-time calculation is reduced in the process of matching and positioning. The invention designs a system for real-time positioning based on a neural network model for matching and positioning geomagnetic track signals, combined with a particle filter algorithm. The system effectively utilizes the advantages of the gated recurrent neural network to extract the characteristics of the geomagnetic trajectory signal, and brings better real-time positioning accuracy to the particle filter algorithm.

This invention relates to digital relay protection reverse limited characteristics realization method, which comprises the following steps: Switching on relay protective device; reading user set parameters to turn variable X1 to X2; computing (Ktau pIrp) / delta t and denoting it on variable X1; collecting current 1j with isolation time delta t; computing 1jr and summing it to variable X2; summing Ipr to variable X1; judging whether variable X2 larger than variable X1; if yes, then processing reverse protective operation, if not then restarting sampling, computing, comparing or judging.

The invention relates to the technical field of robot vision, and particularly discloses a data fusion method, device and equipment for an event camera and a standard camera, and a medium, and the method comprises the following steps: dividing depth image information into a plurality of pieces of point cloud block information according to the resolution of event information; obtaining forward probability information and backward probability information according to the probability density of the point cloud block information and the event information, wherein the forward probability information and the backward probability information are the forward probability and the backward probability of the event information migrated to the position of the point cloud block information respectively; obtaining correlation information of the point cloud block information and the event information according to the forward probability information and the backward probability information; obtaining conditional probabilities of the event information and the point cloud block information according to the correlation information and a total probability formula; fusing the point cloud block information and the event information according to the maximized conditional probability; the method has the characteristics of high matching precision, small calculation amount and high fusion efficiency.

The invention belongs to the field of transmission line maintenance, and in particular relates to a method for determining the number of transmission line channel visualization alarm areas, including the following steps: a. Offline training of the model based on transmission line channel visualization alarm data to obtain suggested values; b. Online decision-making Determine the definite value of the number of divisions of the transmission line channel visualization alarm area; the present invention can automatically determine the division number of the transmission line channel visualization alarm area, based on the determined value, identify the transmission line channel visualization alarm high-incidence area, and find out the alarm high-incidence area The coverage radius conforms to the inspection radius of transmission line maintenance personnel, which brings convenience to transmission line maintenance personnel.

The present disclosure relates to a method, an apparatus, and a computer recording medium for processing presentation content in response to a gesture operation, the method being implemented by a computer, the method comprising the steps of: obtaining a gesture operation of a user on the presentation content; judging whether the gesture operation meets a redrawing triggering condition or not; andunder the condition that the redrawing triggering condition is met, redrawing the presentation content. The invention further discloses a method for processing the presentation content by responding to the gesture operation. The present invention relates to a device and a non-transitory computer recording medium in which a program for implementing the method is stored. Whether the presented content needs to be redrawn or not is determined by judging whether the gesture operation of the user on the presented content meets the redrawing triggering condition or not, the real-time calculation amount can be reduced, the problem that the main thread resource consumption is too much is solved, and the method has the advantages of being high in real-time performance and excellent in performance, so that the interaction experience of the user is improved.

A structured light three-dimensional scanning method based on known markers, comprising the following steps: S1, the establishment of a marker library, the process is as follows: do not turn on the projector, pre-scan markers, and then automatically add the scanned markers to the marker Point library; S2, object scanning and matching of marked points, the process is as follows: S21, the projector projects structured light, and the camera captures and obtains the 3D contour point cloud data of the current frame of the object; S22, identifies the marked points in the field of view of the current frame, and obtains in S1 If the above steps are successfully matched, then the conversion relationship from the current frame to the world coordinate system is obtained according to the matching result, and the 3D point cloud stitching is completed. The invention accurately and flexibly performs scanner positioning and three-dimensional point cloud data splicing.

The invention relates to a simulation method for a single four-quadrant converter, which comprises a converter and an intermediate circuit, wherein the converter consists of four branch circuits which are connected in parallel. The method comprises the following steps of: constructing corresponding state equations according to different conducting states of each switch element in the four-quadrant converter; constructing a state equation judgment module of a simulation model of the single four-quadrant converter by adopting a Simulink module; constructing an adams resolving module of the simulation model of the single four-quadrant converter by adopting the Simulink module; and performing simulation calculation by utilizing the simulation model of the single four-quadrant converter. The modeling method of the invention has visual principle, simple realization step, small real-time calculated amount and accurate and quick simulation, is easy to understand, is favorable for the instantaneity of the simulation, and effectively ensures the convergence during zero pulse.

The invention discloses a path planning system and method for a robot. The method includes: the path planning system for the robot pre-selects one or more position points as reference positioning points on a path for the robot to move in a predetermined area map; If an instruction to move the robot from the first position point to the second position point is received, according to the set reference positioning point and according to the predetermined path analysis rules, analyze the path from the first position point to the second position point. the path of the second location point, and control the robot to move to the second location point based on the analyzed path. The present invention does not need the robot to calculate the moving path in real time during path planning, but to make corresponding selections from the pre-planned paths, that is, the process of path planning is changed from "calculation" to "selection", which effectively reduces the amount of real-time calculations and improves the efficiency. Efficiency of path planning.

The digital method includes following steps: after power on, protector calculates value 1 of formula expressed in the invention; collecting current value at side of electromotor and calculating positive sequence current and negative sequence current; determining whether positive sequence current is larger than 0.06 time of rated current at secondary side of current transformer, and determining states of electromotor: in starting state or in operating state or stop state; calculating formatted heat value in each state respectively; cumulating formatted heat value in each state; determining whether the cumulated value is larger than or equal to value 2 expressed in the invention to decide whether to stop electromotor; after stopping motor, cumulating formatted heat value continuously; determining whether formatted heat value is smaller than value 3 to decide whether to restart motor is allowed. The method reduces quantity of real time computation and required calculation speed.

The invention discloses a resistance spot welding nugget diameter predicting method to solve the technical problems that the practicality of an existing resistance spot welding nugget diameter predicting method is poor. According to the technical scheme, electrode pressure signals are acquired in real time, a unary linear regression equation between the nugget diameter and the electrode pressure change curve rising slope is established, and the real-time predicting of the nugget diameter is achieved. A pressure sensor arranged between a bottom electrode holding rod and a bottom electrode of aspot welding machine is used for acquiring the electrode pressure signals, the sensor installation position is close to a welded workpiece, the effects caused by imbalance of stress in the movement process are reduced, the actual change situation of electrode pressure in the welding process is precisely measured, and the smelting amount of metal is accurately reflected in real time. By means of the unary linear regression equation between the nugget diameter and the electrode pressure change curve rising slope, online and rapid nugget diameter prediction is achieved; and by means of the resistance spot welding nugget diameter predicting method, the nugget diameters of quenched steel, low-carbon steel, stainless steel, an aluminum alloy and other metal materials can be predicted, and the practicality is good.

An adaptive ILC (iterative learning control) based coordinated control method for urban main roads comprises: a. determining a key intersection: for the controlled main roads, the intersection with the largest traffic demand is determined as the key intersection; b, initializing the common signal period, green time ratio and phase difference; c, optimizing the green time ratio at key intersections; d, optimizing the green time ratio at non-critical intersections; e, performing circulation, and repeating steps c and d every 3-5 signal cycles. According to the control method, the intersections are taken as a control object and are coordinated in pairs by flow correlation between the upstream and downstream intersections, green time of each phase of a traffic light is calculated with an ILC method according to real-time vehicle flow conditions, and finally, closed-loop controller parameters are set in real time by an unfalsified strategy. The real-time calculation amount of main road control is reduced, the traffic efficiency of the main roads is improved, the effect is better than that with the traditional timing control scheme, and the effective method is provided for coordinated control of the urban main roads.