11 results about "Rotation model" patented technology

The invention provides an interest point sequence recommendation system and recommendation method based on a hyperbolic space rotation model, and belongs to the technical field of user interest recommending.The method comprises the steps that firstly, an interest point data set is obtained, and a space-time knowledge graph is constructed; weighted transfer graph learning based on the hyperbolic space rotation model and interest point sequence recommendation based on the hyperbolic space rotation model are carried out in sequence; and finally, outputting a recommendation result, judging whether convergence occurs, if not, executing the step 3 again, and if convergence occurs, completing recommendation of the interest points. According to the method, the hyperbolic space is used for modeling the user movement behavior sequence, the hierarchical structure hidden in the relation network can be efficiently described, and compared with the prior art, the method has a good effect in the specific fields of text processing, images, knowledge maps and the like.

The invention relates to a coordinate transformation cooperative detection method and system based on a double-radar multi-dimensional rotation model, and the method comprises the steps: constructing a vehicle-mounted double-radar multi-dimensional rotary table model which is provided with a large rotary table, a large radar, a small radar and a lifting platform; defining a rectangular coordinate system of the vehicle-mounted dual-radar multi-dimensional turntable model based on a right-hand rule; polar coordinates of a detection target on a polar coordinate system of the small radar are converted into polar coordinates on a polar coordinate system of the large radar through a defined rectangular coordinate system of the vehicle-mounted double-radar multi-dimensional turntable model; the polar coordinates of the detection target on the polar coordinate system of the large radar are inversely converted into polar coordinates on the polar coordinate system of the small radar through the defined rectangular coordinate system of the vehicle-mounted double-radar multi-dimensional turntable model. According to the invention, synchronous rotation and bidirectional coordinate conversion can be realized, dead-angle-free detection is realized, the target positioning and tracking precision is improved, and the vehicle-mounted radar complex scene adaptability and reliability are enhanced.

The application discloses a production line process parameter automatic optimization method based on digital twin technology and relates to the technical field of production line process parameter optimization.The method comprises the following steps: obtaining a production line rotation model based on digital twin; obtaining transmission correlation parameters based on the production line rotation model; performing initial optimization and optimization simulation; obtaining initial optimization equipment and transmission optimization features, and establishing an automatic optimization method for optimization; and the method is used for solving the problem that in the existing production line process parameter optimization method, when the transmission efficiency of the conveying device in the production line decreases due to multiple uses or aging, the parameters of the conveying device cannot be effectively adjusted in real time through only large model training or existing data, and the optimal transmission efficiency cannot be maintained in real time in the goods transmission of the production line process.

The utility model relates to the technical field of model display, in particular to a model display device for space planning, which comprises a shell, an annular plate is rotatably connected in the shell, cross rods are rotatably connected to the inner walls of the two sides of the annular plate, the end parts of the two cross rods are jointly and fixedly connected with a circular plate, a movable plate is slidably connected in the upper end of the circular plate, and the movable plate is fixedly connected with the shell. The upper end of the movable plate is fixedly connected with two rod bodies; a plurality of hole grooves are formed in the lower end of the column body, and a bearing plate is fixedly connected to the upper end of the column body. The model is driven by the motor to rotate, so that an observer can automatically rotate the model and completely check details on each side of the model through the device without moving the position, and the complexity of traditional manual adjustment or bypass observation is avoided; a central area observation blind area caused by model height or structure shielding during traditional horizontal display can be eliminated, and it is ensured that details of a planning core area are completely presented.

The invention provides a multi-dimensional deformation monitoring method and system for a blade of a wind driven generator, and relates to the technical field of monitoring of the blade of the wind driven generator. A time-aligned distance data set is generated through high-precision timestamp calibration and synchronous processing, the deformation quantity of each section is accurately calculated in combination with tower drum design parameters, and a dynamic deformation model under a unified three-dimensional coordinate system is constructed through space coordinate conversion based on a blade rotation model. And finally, blade health state evaluation and risk early warning are output through intelligent analysis, so that high-precision, all-weather and blind-area-free real-time monitoring of full-dimensional deformation of the blade is realized, the defect of poor environmental adaptability of a traditional method is effectively overcome, and the accuracy of blade health state evaluation and the timeliness of tower sweeping risk early warning are remarkably improved.

The application relates to the technical field of conveyors, and discloses a three-dimensional detection method and system for surface damage of a drum of a belt conveyor. A laser light source sensor is used to collect a laser deformation image sequence of the drum surface in a non-contact manner. The light bar center of the laser deformation image sequence is extracted. The three-dimensional point cloud of the drum surface is reconstructed and spliced based on the light bar center. The reconstructed three-dimensional point cloud is processed to realize damage identification and quantification. The damage identification result and the quantification parameter are transmitted to a monitoring end. A high-precision laser light source sensor installed at a fixed point is used to carry out non-contact optical measurement. In combination with a multi-stage light bar center extraction technology of fusing a dynamic threshold and morphological processing, a point cloud splicing technology based on a drum rotation model and a feature matching ICP algorithm, and a damage identification quantification technology based on a depth image and a U-Net deep learning semantic segmentation, the three-dimensional morphology of the drum surface is accurately reconstructed, and multiple types of defects such as wear, cracks and depressions are automatically identified.

The application discloses a fin effect clamp jaw force-deformation theoretical modeling method based on a co-rotation model, decomposes a fin effect clamp jaw structure into a plurality of beam units, decouples local deformation and rigid body motion of each beam unit through co-rotation theoretical modeling, respectively establishes an axial deformation model and a rotational deformation model, and introduces an effective length correction coefficient to consider the influence of physical hinge connection; a tangent stiffness matrix of the beam unit is constructed and assembled into a global tangent stiffness matrix; a Newton-Raphson iteration method is used to realize force balance solving of a load increment step, and a global force-displacement relationship is constructed; and through adjustment of a global node force vector, various planar load scenarios such as single-point, multi-point and distributed load are adapted. The application breaks through the limitation of small deformation assumption, accurately represents large deformation behavior, improves the calculation efficiency by hundreds of times compared with finite elements, controls the average error within 6%, can quantize the influence of structural parameters such as connection type, beam quantity, beam inclination angle and top angle, and provides a theoretical basis for fin effect clamp jaw engineering design.

The application discloses a method for predicting the flow velocity of a silicon melt in a Czochralski silicon single crystal growth process, which comprises the following steps: firstly, a two-dimensional axisymmetric rotation model of the silicon melt in the Czochralski silicon single crystal growth process is established, and the boundary conditions of the fluid model are set; then, a space factor physical information neural network is constructed; finally, the two-dimensional axisymmetric rotation model of the silicon melt in the Czochralski silicon single crystal growth process is solved by using the space factor physical information neural network, and finally the prediction result of the flow velocity of the silicon melt is obtained. The application solves the problem that the flow velocity of the silicon melt in the Czochralski silicon single crystal growth process cannot be predicted in real time in the prior art.

The invention relates to the technical field of antenna arrays, and particularly discloses a complex curved surface conformal array arrangement, polarization compensation and optimization method and system, and the method comprises the following steps: S1, point cloud discretization; s2, hexagonal regular arraying: selecting an initial point and a reference point from the point cloud data by taking a preset minimum array element spacing as a constraint, recursively expanding outwards according to a hexagonal geometric rule, screening candidate points meeting distance and angle tolerances, and removing overlapped points to form an array element arraying set; s3, polarization compensation: estimating a curved surface normal vector of each array element position, calculating a deflection angle between the array element normal vector and an array global main axis direction based on an Euler rotation model, correcting an array element local directional diagram to a global coordinate system through a rotation matrix, and compensating polarization mismatch; s4, optimizing a directional diagram: calculating an initial directional diagram of the array after polarization compensation, constructing an error function by taking an ideal directional diagram as a reference, solving an amplitude-phase weighted compensation value through a numerical algorithm, and minimizing a directional diagram error; and S5, carrying out controllable rarefaction.

The invention provides an arch bridge negative angle vertical rotation whole process continuous calculation method and system, and is applied to the technical field of bridge structure construction.The arch bridge negative angle vertical rotation whole process continuous calculation method comprises the steps that an arch bridge vertical rotation model is constructed based on design parameters of an arch bridge vertical rotation structure, and the arch bridge vertical rotation model comprises an inhaul cable simulation unit which comprises multiple sections of straight rod units; arch bridge design parameters and the unstressed length in the initial state are input into an arch bridge vertical rotation model, the arch bridge vertical rotation model is used for simulating the construction process, sub-variable quantities of the unstressed length obtained through calculation are sequentially input, and cable force and control parameters of inhaul cable components in different states are simulated and calculated till the vertical rotation process is completed; the method is simple and flexible in calculation and higher in precision, can truly reflect the quality and rigidity change of the inhaul cable, and is suitable for scenes such as steep deep valleys and busy traffic lines.

The present disclosure provides a continuous calculation method and system for the whole process of negative angle vertical rotation of an arch bridge, which is applied to the technical field of bridge structure construction and comprises the following steps: constructing an arch bridge vertical rotation model based on the design parameters of the arch bridge vertical rotation structure, wherein the arch bridge vertical rotation model comprises a cable simulation unit, and the cable simulation unit comprises a plurality of straight rod units; inputting the arch bridge design parameters and the unstressed length in the initial state into the arch bridge vertical rotation model, simulating the construction process by using the arch bridge vertical rotation model, inputting the sub-variation of the calculated unstressed length in sequence, and simulating and calculating the cable force and control parameters of the cable component in different states until the vertical rotation process is completed; the present disclosure is simple, flexible and high-precision, can truly reflect the changes of the cable quality and stiffness, and is suitable for scenes such as steep valleys and busy traffic lines.