15results about How to "Easy programming" patented technology

The invention discloses a calligraphy stroke feature extraction method and system based on a fixed-size grid. The method relates to the technical field of stroke feature extraction, and comprises the following steps of calligraphy stroke image preprocessing and grid division, grid-based stroke space distribution feature extraction, size feature extraction, grid-based stroke direction feature extraction and feature fusion and output. The method comprises the following steps: S1, normalizing a binary image of calligraphy strokes to a fixed canvas and dividing the binary image into grids; s2, calculating the stroke density of each grid and constructing a density feature vector; S3, refining the image to obtain a skeleton, calculating a direction field and generating a direction feature vector; and finally, the two vectors are connected in series and fused, and a joint feature vector is output for a subsequent task, so that the calligraphy stroke feature extraction accuracy is improved, and the problem of low calligraphy stroke feature extraction accuracy caused by insufficient understanding of dynamic essence, complex form and high-level semantics of calligraphy art in the prior art is solved.

This invention discloses an integrated welding and drilling system and method for vehicle roofs. The system includes a control unit, a robot unit, a positioning fixture, a spot welding unit, and a drilling unit. The robot unit includes a robot and a tool changer. The positioning fixture includes a welding positioning clamping mechanism and a drilling positioning mechanism. The spot welding unit includes a spot welding gun fixedly connected to the tool changer. The drilling unit includes an electric spindle gun and a manual drilling gun, located on either side of the spot welding gun. During operation, the system adjusts the positioning fixture to clamp and support different types of roofs. The control unit controls the robot to move the spot welding gun to the welding area for welding. After welding, the tool changer rotates to switch tools for drilling. After the operation is completed, the robot resets. This system integrates welding and drilling functions, enabling automated, high-precision welding and drilling of vehicle roofs, achieving flexible production operations.

This paper presents a model-based dynamic analysis and design method for conical-cylindrical shells. To address the problem of low computational efficiency in structural dynamics analysis and design optimization caused by the extremely high degree of freedom in traditional finite element methods (FEM) models when dealing with conical-cylindrical shell structures of submarines, the method divides the conical-cylindrical shell structure of the submarine into two substructures and models them using the FEM. The fixed interface principal modes and constraint modes of the substructures are solved, and these are combined into a first coordinate transformation matrix condensed model, resulting in a condensed model. The two condensed models are integrated, and a second coordinate transformation matrix is ​​obtained using the interface compatibility conditions between the substructures. This second coordinate transformation matrix is ​​then used to process the integrated model, yielding a condensed model of the conical-cylindrical shell structure. The frequency response curves and time-domain response curves of the condensed model of the conical-cylindrical shell in modal space are calculated, and then transformed to physical space to obtain the frequency response curves and time-domain response curves in physical space.

The application discloses a kind of multi-limb combined steel support node rotation stiffness calculation methods around weak axis, it is related to the technical field of deep foundation pit engineering and fabricated steel structure;The application decomposes the complex node structure into end plate, connecting plate, bolt group and other mechanical behavior clear core components, and calculates the stiffness of each component by using the component method, and then combines in series and parallel according to the classical mechanics principle, to achieve the technical effect of accurate physical modeling of the semi-rigid characteristics of the node and significantly improving the calculation efficiency.The method avoids complex nonlinear contact analysis, and the calculation formula is clear and easy to program.The calculation results of the method are compared with the full-scale model test results and the fine three-dimensional entity finite element analysis results, which achieves the technical effect of verifying that the calculation error of the method is within the acceptable range of engineering, and proves its reliability, solving the problem of insufficient accuracy of traditional empirical simplified method.

The application provides a reduced-order unified modeling method, system, computer program product and device for electromagnetic small disturbances of a new energy system and a computer readable storage medium, and belongs to the technical field of new energy system modeling. D Q The application establishes a power network differential equation set in the electromagnetic scale under the common D Q coordinate system; a full system state space model is constructed; independent state variables and redundant state variables are identified through a method of traversing system nodes, differential and algebraic equation sets in the full system state space model are separated, a differential equation corresponding to the independent state variables of the system is constructed; based on the differential equation of the independent state variables, a full system differential-algebraic equation is obtained, and the full system differential-algebraic equation is further eliminated to obtain an ODE form of the full system state space model containing only the independent state variables, thereby laying a foundation for stability analysis of a large-scale new energy power system.​​

The invention belongs to the technical field of magnetic measurement, and particularly relates to a calibration method of a magnetic dipole array. The method comprises the following steps: S1, obtaining an independent calibration model of each magnetic source unit; and S2, according to the independent calibration model, measuring and modeling an additional magnetic field generated by coupling between the magnetic source units, and establishing a compensation model. According to the method, the problem is decomposed into N low-dimensional nonlinear fitting and one linear least square problem, the calculation complexity and time consumption are reduced in order of magnitude, and high efficiency in engineering application is achieved.

This disclosure describes a sensing capability resistant to crosstalk. A current sensor is provided for a target conductor among a plurality of conductors. The current sensor includes at least one magnetic sensor configured to provide two signals representing two different parameters of a field, the two different parameters being different components or their directional derivatives (e.g., gradients). The current sensor also includes a processor configured to derive a signal indicating a current based on a linear combination of a first signal and at least a second signal. At least one of these signals is weighted by coefficients that are constants selected based on the distance between the sensor and at least one of the plurality of conductors in at least a first or second direction. The coefficients are selected to reduce the contribution of parasitic magnetic fields to the signal indicating a current in the first conductor, wherein the parasitic magnetic field is generated by at least one other conductor.

The application discloses a kind of micro-nano robots magnetic gradient force calculation method and system under three synchronous rotating magnetic field.The method comprises the following steps: obtaining the position parameters of three synchronous rotating permanent magnets, the magnetic moment size of permanent magnet, common rotating phase, the position parameters of the space point to be calculated and the magnetic moment size of micro-nano robot;Based on magnetic dipole model, the magnetic field generated by three permanent magnets at the space point to be calculated is calculated and superimposed to obtain the total magnetic field;According to the total magnetic field, the total magnetic field direction unit vector is constructed, and the magnetic moment direction of micro-nano robot is kept consistent with the total magnetic field direction;Field matrix, magnetic gradient matrix and gradient force compact matrix are constructed, and the magnetic gradient force vector and its module length suffered by micro-nano robot at the space point to be calculated are calculated.The application can quickly complete the magnetic gradient force calculation under the action of three synchronous rotating magnetic field, and is suitable for trajectory planning, closed-loop control and safety evaluation of magnetic driving micro-nano robot.

A configuration device (1) for configuring settings of a power wheelchair, comprising: a display unit (9) arranged to display a graphical representation of a wheelchair functionality setting, an input unit (3) arranged to detect a user input changing a visual state of the graphical representation on the display unit (9) from a first visual state to a second visual state, wherein every visual state of the graphical representation is associated with a set of wheelchair parameter settings, processing circuitry (5) arranged to determine a set of wheelchair parameters associated with the second visual state of the graphical representation, and a communications unit (11) arranged to send the set of wheelchair parameters determined by the processing circuitry (5) to a power wheelchair.

The application relates to the technical field of civil engineering, and provides a calculation method of a stress discontinuity line position of a sliding line field of active earth pressure, which comprises the following steps: determining basic parameters of a retaining wall and soil bodies behind the wall; dividing a potential sliding area behind the wall into a Rankine area and a transition area; dividing the whole potential sliding area and the Rankine area into a plurality of triangular strips respectively; respectively selecting a triangular strip to perform stress analysis, and establishing a strip force recursive formula; taking different earth pressure values, and iteratively executing the following steps: calculating side pressure coefficients and strip force inclination angles on lines of the triangular strips in the Rankine area; starting from a wall surface, sequentially calculating corresponding strip line side pressure coefficients and strip force inclination angles of the triangular strips in the potential sliding area, and stopping when the strip force inclination angle is equal to an internal friction angle, and the area that has completed the calculation is referred to as the transition area; according to the condition that the side pressure coefficients and the strip force inclination angles calculated on an intersection line of the transition area and the Rankine area are equal, the intersection line is determined as the stress discontinuity line.

The present application belongs to coefficient determination method, and particularly relates to a method for determining the iron water absorption coefficient in gamma logging data interpretation. The method for determining the iron water absorption coefficient in gamma logging data interpretation comprises the following steps: step one, collecting information; step two, calculating the equivalent thickness; and step three, calculating the absorption coefficient. The present application has the following remarkable effects: the method of the present application establishes a fitting function by using the limited discrete data provided by the existing logging model experiment, calculates the iron water absorption coefficient corresponding to different measured borehole diameters by using the function, has high fitting accuracy of the absorption coefficient, and has the advantages of convenient calculation, easy programming, simplified drilling process, and saved drilling construction cost.

The application discloses a master-slave board bus communication addressing system, which comprises a master board and slave boards; the master board comprises an OUT_0 pin; the slave boards comprise INPUT pins and OUT pins, wherein the INPUT pin of a slave board located at the first position in the plurality of slave boards is connected with the OUT_0 pin of the master board, and the OUT pin of a previous slave board is connected with the INPUT pin of a subsequent slave board; the level signal output by the OUT_0 pin of the master board is sent to the INPUT pin of the slave board, and the INPUT pin of the next slave board receives the level signal to complete the addressing after the slave board completes the addressing according to the received level signal; and the application further discloses a master-slave board bus communication addressing method. In the application, the slave boards are connected through two additional IO ports, the OUT pin of a previous slave board is connected with the INPUT pin of a subsequent slave board, and the INPUT pin of the subsequent slave board receives the level signal of the previous slave board to complete the addressing, so that automatic addressing is completed by one board after another, the difficulty of the later maintenance and upgrading of the terminal module is greatly reduced, and the addressing of the slave board is not prone to errors.

The utility model relates to the technical field of hardware workpiece outside diameter processing, concretely to a kind of forming groove cutter of hardware workpiece outside diameter processing, the forming groove cutter includes: tool bar, the tool bar includes tool body, one end of the tool body is provided with tool holder, the side surface of the tool holder is provided with installation slot, the installation slot is provided with the threaded hole that passes through tool holder inside;Blade, the blade is installed in threaded hole, and blade includes tool grain, the through hole that is compatible with threaded hole is provided on the tool grain, and a plurality of tool heads are provided on the tool grain, each tool head is provided with avoid location surface and bevel, and there is cutting head between avoid location surface and bevel;Screw, the screw is sequentially penetrated through hole and threaded hole from outside to inside, and blade is fixed on tool bar.The utility model has the advantages of simple structure, reasonable in design, can make outside diameter groove one forming, programming error rate is low, processing efficiency is high, and it is worth promoting and using.

Embodiments of the present application provide a design method and device for a hydraulic oil tank of a civil passenger aircraft, computer equipment and a medium, wherein the method comprises: determining basic parameters including system inherent volume, oil physical properties and extreme working conditions, calculating system total demand volume and initial oiling volume according to the basic parameters; substituting the initial oiling volume into complete flight profiles under cold and hot temperature working conditions respectively, dynamically analyzing oil tank oil volume change curves caused by temperature changes and actuator actions in each flight stage, and extracting a global minimum oil volume; if the global minimum oil volume does not meet the oil absorption safety margin requirement, iteratively adjusting the initial oiling volume and dynamically simulating and analyzing the oil tank oil volume change curve in combination with the complete flight profile until a new global minimum oil volume meets the oil absorption safety margin requirement, determining the volume of the hydraulic oil tank according to the new global maximum oil volume, and adjusting the structural design of the hydraulic oil tank. The scheme improves the efficiency and accuracy of the hydraulic oil tank design.

This invention belongs to the field of road traffic noise reduction technology, and relates to a sound barrier shape optimization method based on the singular boundary method of isogeometric geometry. This method combines isogeometric analysis with the singular boundary method to optimize the sound barrier shape more simply and accurately, improving optimization efficiency. Specifically, it includes the following steps: establishing a geometric model of the sound barrier based on its geometric parameters; extracting information from the established geometric model and importing it into the program to obtain the interpolation points of the geometric model boundary, which are then used as the boundary points of the singular boundary method; establishing a sound barrier shape optimization model using known acoustic control equations; calculating the set objective function and constraints using the optimization model, and iterating the results using the moving asymptote method to obtain the optimal value; and outputting the final optimized shape of the sound barrier. This method avoids repetitive modeling processes during optimization, eliminates the need for mesh generation and numerical integration, and boasts high overall speed, high efficiency, and reliable principles.