113 results about "Projection method" patented technology

The invention belongs to the related technical field of power system optimization operation, and particularly relates to a non-iterative interconnected multi-microgrid system optimal power flow determination method based on a dimensionality reduction projection method, and the method comprises the steps: reconstructing a multi-microgrid centralized operation model, and obtaining a sub-problem of each sub-microgrid; taking a multi-dimensional variable space formed by all public variable sets in each sub-problem and a preset sub-microgrid operation cost variable as a projection space of the sub-problem; determining an initial vertex set of the projection of the convex hull corresponding to the original operation space constraint of each sub-problem in the projection space, and translating the coordinate origin to the interior of the convex hull enclosed by the vertex set; based on the convex hull and the outer normal vector of each boundary surface, circularly searching vertexes satisfying original operation space constraints outside each boundary surface in the projection space, and taking a space enclosed by a final vertex set as a projection space of the operation space constraints of the sub-problem; and reconstructing the sub-problem in the space and solving the sub-problem. According to the method, the optimal power flow can be solved under the condition that only public variables are disclosed.

The invention relates to the technical field of rolling bearing state monitoring, and discloses a rolling bearing performance degradation evaluation method based on kernel optimal global locality preserving projection and Sinkhorn distance, which comprises the following steps: acquiring an original vibration signal of a rolling bearing, performing feature extraction on the original vibration signal, and constructing a high-dimensional feature set; calculating and screening features in the high-dimensional feature set, and constructing a sensitive feature set; performing dimension reduction processing on the sensitive feature set by adopting a kernel optimal global locality preserving projection method to obtain a low-dimensional feature matrix; in the low-dimensional feature matrix, the difference between samples is calculated based on the optimal transmission distance of entropy regularization, and a Sinkhorn distance matrix is constructed; on the basis of the Sinkhorn distance matrix, constructing a degradation index; a health threshold is set, an early degradation point is judged through the degradation index and the health threshold, rolling bearing fault recognition and performance evaluation are achieved in combination with the change trend of the degradation index value, and technical support can be provided for health monitoring and intelligent maintenance of rotary mechanical equipment.

The invention discloses an extreme high temperature inter-year prediction method and device and a storage medium, and belongs to the technical field of inter-year prediction, and the method comprises the steps: obtaining a second extreme high temperature strength index extracted based on multi-mode multi-initial-field return test data in a target prediction time period, inputting the second extreme high temperature strength index into a pre-trained Transform-based region prediction model, and obtaining a prediction result of the second extreme high temperature strength index; acquiring an extreme high-temperature strength inter-year prediction sequence of each region in the target geographic region; and reconstructing the extreme high-temperature strength inter-year prediction sequence of each region to the spatial grid points through a linear projection method to obtain a spatial distribution prediction result of the extreme high-temperature strength in the target geographic region. According to the method, the capability of a power mode for summer extreme high temperature strength interannual prediction is remarkably improved, and the defects of an existing mode in extreme high temperature strength interannual prediction are effectively overcome.

The invention discloses an MATLAB-based turbine blade surface coordinate system establishment and film hole definition method, which is characterized in that a local coordinate system is constructed through parameterized grids, accurate design and spatial positioning of geometric parameters of film holes are realized, firstly, blade molded lines are partitioned, and body-fitted grids are generated; calculating flow direction, spanwise direction and normal direction unit vectors based on the grid nodes to establish a local coordinate system; through mathematical definition of an inclination angle and a compound angle, film hole parameterization design is completed under a local coordinate system and mapped to a global coordinate system to generate an inlet coordinate and an outlet coordinate. By means of the method, the problems that in a traditional two-dimensional projection method, parameters are fuzzy, and the degree of freedom of adjustment is low are solved, high-precision and iterative air film cooling hole design is achieved, and an efficient technical means is provided for cooling performance optimization and manufacturing of aero-engine turbine blades.

The invention belongs to the technical field of data processing, and provides a roadway contour extraction method, system, equipment and medium based on three-dimensional point cloud in order to solve the problems of inaccuracy, low efficiency and the like in existing coal mine roadway feature extraction. Combined noise filtering is carried out on a space formed by connecting angular points of fitting contours on adjacent slices, so that scattered noise and useless shielding are effectively reduced, and the data definition and reliability are improved; based on neighborhood calculation perpendicularity features, a top plate, the ground and the side wall of the roadway are recognized, and non-roadway structure data such as pipelines are accurately removed in combination with a cylinder fitting method and a plane fitting method, so that the accuracy of roadway contour extraction is ensured; and fitting the outermost plane based on the farthest points of the point clouds on the upper, lower, left and right surfaces by adopting a segmentation-projection method, and extracting irregular roadway contours from the top surface, the ground and the side surfaces to realize refined roadway contour extraction.

The invention discloses an AI-supported multi-modal desktop interactive projection method and system, and the method comprises the following steps: synchronously collecting visual signals, tactile data and voice input in a desktop projection environment, and obtaining a multi-modal information set after data fusion; calculating priority weight distribution of each mode according to the multi-mode information set, and obtaining a high-priority mode sequence; if the visual signals in the high-priority modal sequence are judged to be dominant, extracting a visual dominant feature group; performing cross validation on the visual dominant feature group and the tactile data, and judging information consistency after data fusion; according to an information consistency result, dynamically adjusting transparency control parameters of projection layering to obtain optimized hierarchical configuration; and updating the projection display content according to the optimized hierarchical configuration, and outputting the final projection content. According to the method, the interaction real-time performance and immersion of desktop projection are improved, and finally the technical effects of optimizing user experience and improving system intelligence are achieved.

The invention relates to a grabbing parameter calculation method based on garbage three-dimensional modeling, and the method comprises the following steps: S1, based on a multi-view three-dimensional reconstruction technology, employing a multi-view stereoscopic vision algorithm, collecting object multi-angle RGB-D data through a 3D camera, employing a Poisson surface reconstruction algorithm to construct a complete three-dimensional model, and generating a garbage three-dimensional point cloud model, s2, on the basis of the three-dimensional point cloud model in the S1, a Z-buffer depth detection algorithm is adopted, the lowest point of the model in the Z-axis direction is recognized through an axial extremum search method, space reference coordinates are determined in combination with a ground projection method, and reference positioning data are generated. The method has the advantages that the multi-angle RGB-D data is fused through the multi-view three-dimensional reconstruction technology, the high-precision three-dimensional model is constructed by adopting the Poisson surface reconstruction algorithm, the problem of geometric feature deficiency caused by traditional single-view modeling is effectively solved, the spatial representation capability of the special-shaped object is improved, the lowest point of the model is recognized based on the Z-buffer depth detection algorithm, and the accuracy of the model is improved. And space reference coordinates are established in combination with a ground projection method, and the physical rationality of grabbing and positioning is enhanced.

The present invention provides a projection device, a projection method, and a measurement device that are for assisting measurements performed by a three-dimensional measurement machine. This projection method comprises: a step for acquiring a transformation matrix for performing coordinate transformation from a coordinate system of a measurement device (10) to a coordinate system of a projection device (50); a step for using the transformation matrix to perform coordinate transformation to the coordinate system of the projection device with respect to a measurement assistance image in which the shape of a measurement target area of a workpiece that has been installed in the measurement device is indicated by the coordinate system of the measurement device; and a step for projecting the coordinate-transformed measurement assistance image onto the workpiece.

The invention discloses a method for rapidly projecting a large-scale point cloud to a parametric curved surface, a storage medium and equipment, and relates to the technical field of industrial measurement, and the method mainly comprises the steps: carrying out the point cloud extraction according to a CAD theoretical model and a corresponding point cloud grid model, and obtaining a surface parallelogram point cloud; parameterization division is carried out on the curved surface of the CAD theoretical model to obtain parametric curved surface point clouds, a projection initial value is obtained by combining the parametric surface point clouds, and projection points of the to-be-projected points to the parametric curved surface are obtained by using a least square method; by implementing the method, the storage medium and the equipment for rapidly projecting the large-scale point cloud to the parametric curved surface, the large-scale point cloud error analysis speed in industrial measurement can be increased.

The invention provides a projection method and device, terminal equipment, a storage medium and a vehicle. The method comprises the steps that when a projection system of a vehicle is in an on state, an information input assembly can collect description information of a user on a projection object, and at the moment, a vehicle controller can obtain the description information of the projection object and process the description information of the projection object to obtain to-be-projected data corresponding to the description information of the projection object; finally, the vehicle controller controls the vehicle lamp of the vehicle to project the to-be-projected data, through the method, information can be obtained from the user, the to-be-projected data corresponding to the description information of the user on the projection object is projected through the vehicle lamp, and therefore the entertainment and practicability of the vehicle lamp and the man-machine interaction aspect are improved.

A projection system and a projection method are provided. The projection system includes a projection module, an image capture apparatus, an input apparatus, and a processor. The processor is configured to: receive an input signal from the input apparatus and generate an input command accordingly; drive the image capture apparatus to obtain a target captured image, where the target captured image includes a target image corresponding to a target object; transmit the target captured image and the input command to a cloud server; receive an analysis result generated by an artificial intelligence computing module according to the input command and the target image from the cloud server; determine display information according to the analysis result, and calculate a display position of the display information within a projection range; and drive the projection module to project an information image with display information.

A projection device (20) comprises: a distance measurement unit (22) that measures the distance to the projection device (20) from each of three or more non-aligned points located on two non-parallel reference lines, which are drawn on a projection surface (50) in the building and the positions of which are defined in drawing data of a building; an angle measurement unit (27) that measures the angle of the distance measurement unit (22) when the distance was measured; a control unit (24) that performs spatial recognition to link a position in the drawing data with a position on the projection surface (50) on the basis of the measured distance and the angle of the distance measurement unit (22) when the distance was measured; and a projection unit (23) that projects a light-emitting point at a position on the projection surface (50) corresponding to a work position defined in the drawing data. The control unit (24) shifts the position of the light-emitting point on the projection surface (50) on the basis of the result of the spatial recognition.

The invention discloses a public pipe gallery collision detection method, and belongs to the technical field of pipeline collision detection and three-dimensional simulation. The method comprises the following steps: constructing a spatial geometric model of a public pipe gallery according to gallery entering design, and extracting vertex coordinates and triangular mesh information of the spatial geometric model; a mixed hierarchical bounding box model is established, a shaft alignment bounding box is adopted for static structures such as a pipe shaft, a pipe frame and monitoring equipment, a capsule bounding box is adopted for a pipeline, and a hierarchical bounding box tree is constructed from top to bottom; performing interference judgment between the bounding boxes by adopting a repeated projection method to realize coarse detection; performing triangular mesh point cloudization on intersected leaf nodes, and performing fine detection by calculating an inclusion relation between a point set and a capsule bounding box; and finally outputting a collision position. According to the invention, through combination of the mixed hierarchical bounding box structure and the triangular mesh point cloud technology, the precision and efficiency of collision detection in a public pipe gallery scene are significantly improved, the false alarm rate and the calculation complexity are effectively reduced, and the method is suitable for real-time collision detection and pipeline entry planning of a complex industrial pipe gallery.

The application provides a method for trajectory midcourse target recognition based on a low-data-rate HRRP sequence, and relates to the technical field of radar signal processing.The method obtains target signals through steps one and two, and inputs the HRRP sequence obtained by observing the target through a radar sensor as sample data; the method extracts features of the target through steps three and four: the method establishes a precession model by taking a cone-cylinder target as an example, uses the periodicity of scattering center points in the HRRP sequence to perform time-frequency analysis, and realizes one-dimensional feature distribution of energy strength by using a projection method, so as to extract a precession frequency; and the method extracts target structure features, entropy value features and period features; the method performs signal feature fusion processing through step five, classifies the features by performing feature importance analysis and using a Random Forest algorithm, obtains the category of a target to be recognized, and outputs a final fusion result.

The application provides a formation fracturing detection method and device, a storage medium and a processor, and belongs to the technical field of well logging. The method obtains a frequency spectrum array of original array waveform data, calculates slowness values of each acoustic mode, then obtains a frequency dispersion curve greater than a preset resolution according to iterative operation of hierarchical clustering and threshold division, projects the time difference and the frequency of the frequency dispersion curve to a time difference axis by using a time difference-frequency projection method to obtain a time difference-frequency projection curve after fracturing, overlaps the time difference-frequency projection curve after fracturing with a time difference-frequency projection curve before fracturing to obtain a time difference change value at the lowest frequency, and finally determines the degree of formation fracturing according to the time difference change value at the lowest frequency to obtain a formation fracturing detection result, so that the change of formation shear wave velocity caused by fracturing and the degree of formation fracturing can be accurately distinguished.

This application discloses an artificial intelligence-guided projection sand table and its projection method, belonging to the field of digital sand table technology. The sand table includes a data acquisition device, a data processing terminal, and a projector. The data processing terminal is connected to the data acquisition device, and the projector is connected to the data processing terminal. The data acquisition device is used to collect data information about the projection area of ​​the sand table, the observer, and the distance between the observer and the sand table. The data processing terminal is used to process the observer's data and distance information, calculate the projection data using a projection display prediction model, and send it to the projector. The projector is used to adjust the projection parameters of the device according to the projection data to project images. This application's solution uses sensors in the sand table in conjunction with corresponding analysis algorithms to process data, enabling dynamic adjustment of the direction and effect of the sand table's projection display based on changes in the observer's position.

The application relates to a three-dimensional extended target tracking method of an adaptive Gaussian process under unknown measurement noise. Firstly, a forgetting factor is adaptively updated by recursively calculating the change rate of the Cramer-Rao lower bound trace, so that the dynamic optimization of filter parameters is realized; then, a projection method based on GP is used to represent a three-dimensional cross-shaped target, three-dimensional point clouds acquired by a sensor are projected to three orthogonal planes, and the three-dimensional extended shape of the target is reconstructed by using two-dimensional contour information; finally, a robust state estimator is constructed by fusing variational Bayesian inference and MCC, the joint posterior distribution of unknown measurement noise and system state is solved by variational approximation, and a cost function is constructed based on the maximum correlation entropy criterion, so that the influence of abnormal values is inhibited in a reweighted manner. The tracking method provided by the application can significantly improve the tracking precision and robustness of a three-dimensional extended target under unknown strong non-Gaussian measurement noise.

A projection method includes: detecting a projection target; specifying a first region in which an obstacle is not present in the projection target and a second region in which the obstacle is present in the projection target based on a result of detecting the projection target; projecting a first projection image in a part or an entirety of the first region; and projecting a second projection image that is different from the first projection image and indicates that the obstacle is present in the projection target.

The application discloses a rocket recovery trajectory planning method based on an improved model prediction static programming algorithm, the rocket dynamics equation is calculated by using a second-order Pic iteration format, so that state quantities at different moments are independent of each other and state quantity expressions explicitly contain control quantities; non-equidistant scattering is carried out based on Chebyshev polynomials to improve the scattering precision; the MPSP algorithm is used to iteratively solve the optimal control problem after scattering, and a projection method is introduced in the solving process to process the thrust constraint. The application significantly improves the calculation efficiency of the MPSP algorithm and can solve the online trajectory planning problem of the rocket recovery containing complex constraints.

The invention belongs to the technical field of electric power system time delay analysis, and relates to a Lagguerre-Taylor hybrid order reduction method for a multi-time-delay electric power system, which comprises the following steps of: S1, modeling the multi-time-delay electric power system and defining an order reduction problem; s2, a projection matrix is constructed, wherein a Laguerre function and Taylor are expanded and mixed; the method specifically comprises the steps that a projection matrix V1 is constructed based on scale Laguerre function expansion, a projection matrix V2 is constructed based on Taylor expansion, and a high-order block Krylov subspace orthogonal basis is generated based on a high-order block Arnoldi execution process; s3, constructing a Lagguerre-Taylor hybrid projection method of the multi-time-delay power system, and constructing an order reduction system; s4, analyzing the stability of the reduced-order system; according to the method, the reduced-order framework based on the projection matrix is constructed, the time-delay term algebraic structure of an original system is completely reserved, and the defect that the time-delay structure is damaged in an existing method is overcome.

The invention relates to the technical field of carbon dioxide capture, in particular to a carbon capture structured filler design and optimization method based on fluid topological optimization, which comprises the following steps: constructing a carbon capture reaction design domain geometric unit, taking a filler basic unit as a core, and setting a fluid inlet and outlet extension section, distinguishing a fluid domain, a solid domain and a transition state between the fluid domain and the solid domain through a continuous material density field, and defining boundary conditions such as a gravitational field matched with an actual absorption tower and adiabatic slippage-free boundary conditions; establishing a polynomial modified topological optimization multi-physics field coupling equation set, introducing a polynomial improved Darcy interpolation function to optimize fluid-solid interface characteristics, and meanwhile, improving numerical stability by combining a filtering method and a projection method; on the basis of the modeling solving platform, a global convergence moving asymptote method is adopted for iterative solving, and a carbon capture filler structure with a fine and complex flow channel is generated; the problems that traditional filler design depends on experience, the design freedom degree is low, and the optimization efficiency is limited can be solved.

A method for rapidly solving the occurrence of a structural plane in an inclined borehole video by using a projection method comprises the following steps: step 1, drawing a borehole orifice point in three-dimensional cartographic software, and naming the borehole orifice point as a point A; 2, drawing a drilling direction line according to a drilling azimuth angle through an orifice point; and drawing the axis of the inclined drill hole according to the vertex angle of the drill hole through the orifice point and the drill hole direction line, and naming as a drill hole axis AB. The technical problem to be solved by the invention is to provide the method for rapidly solving the occurrence of the structural plane in the inclined drilling video by using the projection method, and three-dimensional cartographic software (such as 3DE software and the like) is used for obtaining the inclined drilling video, and then the occurrence of the structural plane in the inclined drilling video is rapidly solved according to the known azimuth angle and vertex angle of a drilling hole and the visual tendency and visual dip angle of the structural plane identified in a video result. The method for efficiently, simply, conveniently and accurately solving the occurrence (true tendency and true dip angle) of the structural surface by using a projection method can improve the efficiency of an engineer for calculating the occurrence of the structural surface in the inclined drilling video.

A projection method includes generating projection size information representing a dimension of a first projection image displayed on a projection surface based on information output from a sensor, obtaining a first image including a first human image representing a person, generating a third image including a second image which is obtained by adjusting a size of the first human image based on the projection size information, and projecting the third image to thereby display a second projection image on the projection surface.

A projection method includes: displaying, by controlling a projection apparatus, a projection image having four corners inside a display area having four corners, the display area being an area on a projection surface; acquiring a first captured image that is a captured image of a range including the display area where the projection image is displayed; detecting, by performing image processing on the first captured image, a plurality of first feature points corresponding one-to-one to each of four corners of a first image indicating the display area in the first captured image; displaying, by controlling the projection apparatus, a pointer image for adjusting a shape of the projection image, the pointer image being located at a corner of the projection image; performing a first correction of correcting the shape of the projection image by changing a position of the corner of the projection image based on a user operation for moving the pointer image; and performing, based on the plurality of first feature points, a second correction for maintaining a positional relationship between the four corners of the display area and the four corners of the projection image determined by the first correction.

A projection method, a projection apparatus and a related product relating to the field of autonomous driving. The projection method comprises: a projection apparatus (250) projects a light beam into a first environment, the projected light beam being a light beam obtained by filtering using a first filtering parameter set, wherein the first filtering parameter set is determined on the basis of first environment information corresponding to the first environment, such that the first filtering parameter set is continuously adjusted on the basis of the change of the first environment information, and a light beam outputted from the projection apparatus (250) also changes on the basis of the change of the first filtering parameter set, thereby achieving the effect that the projection apparatus (250) projects different patterns in the first environment. The projection method utilizes the filtering characteristics of a filtering unit, so that the projection apparatus (250) projects different patterns, thereby facilitating a simplified and low-cost design of the projection apparatus.

The invention provides a projection system and a projection method. The projection system comprises a projection module, an image acquisition device, an input device and a processor. The processor is configured to: receive an input signal of an input device and generate an input instruction according to the input signal; driving the image acquisition device to acquire a target acquisition image, wherein the target acquisition image comprises a target image corresponding to the target object; transmitting the target captured image and the input instruction to a cloud server; receiving an analysis result generated by an artificial intelligence operation module from the cloud server based on the input instruction and the target image; determining display information according to an analysis result, and calculating a display position of the display information in the projection range; and driving the projection module to project an information image with display information. According to the projection system and the projection method provided by the invention, the target information corresponding to the target object can be projected and displayed around the target object in time.

A calculation method includes extracting a plurality of first feature points by performing a first convolution operation on a material image which is input to a first CNN, and which is to be projected onto an object, extracting a plurality of second feature points by performing a second convolution operation on an object image which is input to a second CNN, and which includes the object, and deriving a correspondence relationship between a plurality of first corresponding points and a plurality of second corresponding points by performing a third convolution operation on the plurality of first corresponding points belonging to the plurality of first feature points input to a third CNN, and on the plurality of second corresponding points belonging to the plurality of second feature points input to the third CNN.

The application discloses an intelligent interactive projection method and an interactive projection device, and relates to the technical field of interactive projection.The application solves the technical problem that the recognition accuracy is low, the algorithm cannot accurately detect the key features of user actions, and the interaction is affected.The application generates signals by detecting the detailed features of user gestures and the multi-dimensional information of specific objects in the motion signal generation stage for static motion signals.Compared with some simple motion detection methods, the application can more accurately recognize static actions.For real-time motion signals, the application improves the accuracy of real-time motion recognition by comprehensively capturing motion features, and efficiently processes image data by using advanced computer vision algorithms and signal processing technologies.In the real-time motion signal processing process, the application meets the real-time requirements by quickly preprocessing images, extracting features and processing in segments, and guarantees the smoothness of the interaction.

The invention provides projection device, a projection method and a projection system. The projection system includes the projection device. The projection method is for controlling the projection device. The projection device includes a projection apparatus, a video and audio processing circuit and a power control circuit. The video and audio processing circuit is coupled to the projection apparatus. The power control circuit is coupled to the projection apparatus and the video and audio processing circuit. The power control circuit is for receiving a power signal correspondingly provided by an external power supply unit when a switchable mechanism is in an open state. The power control circuit enables the projection apparatus and the video and audio processing circuit according to the power signal, such that the video and audio processing circuit outputs image data to the projection apparatus and controls the projection apparatus to project a dynamic projection image.

A calculation method, a projection method and a control device. When a convolution operation is performed on both a first image and a second image using the same convolutional neural network, the accuracy of the correspondence relationship between the first image and the second image determined by a matching unit is low. The calculation method includes: extracting a plurality of first feature points (CP1) by performing a first convolution operation on a material image (MI) to be projected onto an object input to a first CNN (124b [1]); extracting a plurality of second feature points (CP2) by performing a second convolution operation on an object image (OI) including an object inputted to a second CNN (124b [2]); and deriving a correspondence relationship between a plurality of first corresponding points (RP1) and a plurality of second corresponding points (RP2) by performing a third convolution operation on a plurality of first corresponding points (RP1) included in a plurality of first feature points (CP1) input to the third CNN (124b [3]) and a plurality of second corresponding points (RP2) included in a plurality of second feature points (CP2).