21results about How to "Optimize design parameters" patented technology

The present invention discloses a hydrodynamic performance test device for a flexible umbilical cable of a wave glider, comprising: a connecting frame, used to connect the device to a crossbeam of a towing tank vehicle; a slide rail, installed at the lower part of the connecting frame; a horizontal slide, slidably arranged on the slide rail; an umbilical cable to be tested, the first end of which is connected to the connecting frame through a two-degree-of-freedom conversion device and a three-component force sensor, and the second end is connected to the horizontal slide through a two-degree-of-freedom conversion device and a single-component force sensor; a pre-tension adjustment device, installed on the crossbeam, and the pre-tension adjustment device is connected to the horizontal slide; an image acquisition device, arranged on the connecting frame above the umbilical cable to be tested, for recording the motion state of the umbilical cable to be tested. The present invention can restore the real state of the flexible umbilical cable to the greatest extent, eliminate the influence of other components of the wave glider on the hydrodynamic characteristics of the flexible umbilical cable, and directly obtain the hydrodynamic characteristics of the flexible umbilical cable.

The invention discloses a rudder wing structure optimization method and system for a high overload environment, and relates to the technical field of rudder wing structure optimization design, and the method comprises the steps: determining a wing shape and a plane shape of a rudder wing structure; calculating the rudder-wing area of the rudder-wing structure; designing a three-dimensional steering engine structure and constructing a numerical simulation model; performing simulation analysis on the three-dimensional steering engine model in a simulated bore high overload environment to obtain an equivalent stress distribution diagram, and identifying an abnormal deformation position, a corresponding maximum stress value and a structure unit to which the maximum stress value belongs in the distribution diagram; and constructing a proxy model according to the sample data, and determining a final optimization scheme based on an optimization algorithm. The problem that numerical simulation of a steering engine system is difficult in a high-overload environment is effectively solved, and the rudder wing structure which meets the flight aerodynamic performance and has structural strength is designed.

The embodiment of the invention provides a parameter determination hardware system and method for a storage application chip, a storage medium and electronic equipment, and relates to the field of servers, and the system comprises a server host which is used for sending video data to the storage application chip; the storage application chip is used for determining parameters of the storage application chip, performing parameter adjustment on the storage application chip according to the determined parameters, and processing the video data into compressed video data after parameter adjustment; the storage hard disk is used for receiving the compressed video data; the storage application chip comprises a video graphic array module, a video compression module, a system bus, a processor, a storage controller and a frequency determination module; the video compression module comprises a storage array depth determination module; by means of the system, parameters such as the processor frequency of the storage application chip, the system bus frequency and the storage array depth of the video compression module can be determined.

The invention discloses a cable-stayed bridge reasonable finished bridge state prediction method and system based on deep learning, and the method comprises the steps: S1, determining a cable-stayed bridge building target, collecting historical cable-stayed bridge finished bridge state data, defining a state space of a cable-stayed bridge reasonable finished bridge state prediction model, and carrying out the initialization of the state space; s2, constructing a finite element model of the cable-stayed bridge, and calculating stress parameters and deformation parameters of the cable-stayed bridge; s3, generating an original morphological image of the cable-stayed bridge, performing preprocessing, extracting morphological characteristics of the cable-stayed bridge, and enhancing a state space to obtain an enhanced state space; s4, defining an action space, a value function and a reward function of the cable-stayed bridge reasonable finished bridge state prediction model; and S5, reinforcement learning training is carried out on the reasonable finished bridge state prediction model of the cable-stayed bridge, and a state space after training is finished is used as a reasonable finished bridge state of the cable-stayed bridge. The problems that a traditional cable-stayed bridge finished bridge state calculation method depends on manual calculation, and calculation is complex are solved.

The invention discloses a simulation analysis method and device for a circuit board conducting film and a storage medium. The method comprises the steps of obtaining historical electromagnetic wave attenuation data; carrying out electromagnetic field modeling according to a grid division method, boundary conditions and material attributes to obtain an electromagnetic field model; performing a stress experiment according to the electromagnetic field model to obtain electromagnetic wave attenuation data; performing support vector machine classification according to the electromagnetic wave attenuation data and the historical electromagnetic wave attenuation data to obtain classification data; performing model coupling according to the electromagnetic field model and the standard performance degradation model to obtain a multi-physical field model; according to the electromagnetic wave attenuation data and the classification data, inputting the data into a pre-fitted standard performance degradation model to obtain predicted performance; and comparing the prediction performance with the expected performance, and when the prediction performance is judged to be lower than the expected performance, performing tree algorithm optimization to obtain optimization design parameters. The method can prolong the service life of the conductive film.

The present disclosure provides a multi-band antenna device (100), the multi-band antenna device (100) comprising a first dipole radiating element (104), a second radiating element (106) and a metasurface superstrate (MSS) structure (108). The first dipole radiating element is used to operate in a first frequency band and is arranged on an upper plane of a support structure (112) at a first distance from a reflector (110). The second radiating element is used to operate in a second frequency band and is arranged on a lower plane of the support structure at a second distance from the reflector. The second distance is smaller than the first distance. The second frequency band is higher than the first frequency band. The MSS structure is arranged in a region within an arm of the first dipole radiating element and enhances the performance of the second radiating element to increase the directivity and gain of the multi-band antenna device.

The invention belongs to the technical field of power semiconductor devices, and particularly provides a method for optimizing a high-dielectric-coefficient super-junction MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) structure. Firstly, a coordinate system is established, a Poisson equation and boundary conditions are listed, Taylor expansion potential is used at the boundary, electric field expressions of a semiconductor region and a high-dielectric-coefficient insulating medium region are solved, and an optimization objective function and constraint conditions are constructed with the depth-to-width ratio and the dielectric coefficient ratio as optimization parameters and the minimum ratio on resistance as the target; then, according to the constraint condition, obtaining a numerical solution of the target function by adopting a dimension reduction method, and obtaining a polynomial fitting expression through polynomial fitting; and finally, according to a polynomial fitting expression of the target function, calculating to obtain an optimal value of the depth-to-width ratio. On the basis of the depth-to-width ratio, the dielectric coefficient entering the high-dielectric-coefficient insulating medium serves as a design parameter, a fitting empirical expression is provided, the optimization method of the Hk super junction structure is effectively simplified, the calculation amount is reduced, and the efficiency is improved.

The present invention relates to the technical field of single pile testing, and in particular to an offshore wind turbine foundation torsion test device. An offshore wind turbine foundation torsion test device comprises: a reaction frame, provided with a bottom plate, a first column and a model box are fixedly provided on the bottom plate, and the model box is suitable for accommodating a saturated soil layer; a single pile, partially inserted into the saturated soil layer; a force-applying component, including a force-applying member, the force-applying member is parallel to the bottom plate, and the force-applying member is fixedly connected to the first column; a force transmission component is arranged between the force-applying component and the single pile, and comprises a force transmission frame, one end of the force transmission frame is connected to the force-applying member, and the other end of the force transmission frame is fixedly connected to the single pile, and the force transmission frame converts the force transmitted by the force-applying member into a rotational force applied to the single pile, so that the single pile rotates periodically along its own circumferential direction. The present invention solves the problem that the existing single pile testing device can only carry out a force test of a traditional anchor foundation subjected to a certain force, and cannot carry out torque analysis, thereby providing an offshore wind turbine foundation torsion test device.

The invention belongs to the field of unmanned aerial vehicle aerodynamics, and particularly relates to a device and a method for testing transient longitudinal aerodynamic characteristics of a fixed-wing unmanned aerial vehicle. According to the scheme, the electric cylinder is used as an actuator, and the pitching angle of the unmanned aerial vehicle can be dynamically adjusted by controlling the elongation change of the electric cylinder. The supporting legs, the bottom frame, the front vertical frame and the rear vertical frame which are used by the device can be built by adopting profiles, and the device is simple in structure, low in cost and convenient to assemble.

The application discloses a kind of rigid-flexible coupling two-way closed loop time domain dynamics calculation methods of underwater towing system, belong to the field of ocean engineering and underwater equipment technology;Method includes: establishing multi-coordinate system framework, constructs the six-degree-of-freedom rigid body motion equation of underwater vehicle, buoy and the partial differential dynamics equation of continuous elastic body of tow cable, is integrated into whole coupling model by displacement, velocity and force boundary condition.Set up two-way closed loop calculation framework: in each time step, first solve the boundary force of two rigid bodies based on the state of tow cable, and parallelly use four-order Runge-Kutta method to advance rigid body state simultaneously;Again, the updated rigid body position and velocity are used as forced boundary condition, and the tow cable is solved again using mixed difference method, to obtain the coordinated cable shape and tension distribution at the next time.This application realizes the dynamic synchronous update of rigid body motion and flexible cable deformation, and overcomes the phase lag and amplitude error of traditional weak coupling method.

This invention provides a reverse design method for wharf foundation piles based on multi-objective optimization, belonging to the field of civil engineering structural design technology. In the composite load space composed of vertical, horizontal loads, and bending moments, this invention uses a shape parameter vector containing dimensions and coupling coefficients to define and parameterize the target failure envelope. By performing numerical limit state analysis and fitting on design samples, the actual shape parameters are obtained. This is used to train a machine learning model that can quickly predict the shape of the corresponding envelope from the design parameters. Using the difference between the predicted shape and the target shape as the optimization objective, and combined with construction costs, the model is used to evaluate candidate designs. A multi-objective optimization algorithm is used iteratively to obtain a set of design parameters that optimally balance performance and cost. The selected design is verified through high-precision simulation. After confirming that its actual performance matches the target, the parameters and performance information are integrated into a standard digital file to directly drive automated construction.

The invention relates to the technical field of aerodynamics of unmanned aerial vehicles, in particular to a device and a method for testing transient composite working condition aerodynamic characteristics of a fixed-wing unmanned aerial vehicle. According to the device, the four electric cylinders are used as the actuators, the pitching angle and the rolling angle of the unmanned aerial vehicle can be dynamically adjusted by controlling the elongation change of the four electric cylinders, and the defect that an existing fixed-wing unmanned aerial vehicle aerodynamic characteristic testing device can only conduct static pure working condition testing is overcome. The bottom frame, the front vertical frame and the rear vertical frame can be built through sectional materials, the structure is simple, cost is low, assembling is convenient, an electric cylinder is used as an actuator, the control method is simple and convenient, and control precision is high.

The application discloses a shale oil horizontal well microseismic fracture parameter interpretation prediction method, and steps are as follows: step (1), microseismic fracture parameter interpretation prediction data preparation, determining the principle of parameter screening, and collecting the data of the screened parameters; step (2), data preprocessing; step (3), fracture parameter influence factor screening; step (4), regression prediction model construction; step (5), regression prediction model verification and evaluation; and step (6), application of the regression prediction model. The application has the following beneficial effects: 1. two modeling methods are used to establish a shale oil fracturing fracture parameter prediction model, and quantitative prediction of microseismic fracture parameters is realized; 2. high accuracy; 3. as a basis for shale oil horizontal well design, the application can optimize construction scale and design parameters, and also can provide a diagnosis method for fracturing construction, timely adjustment of construction parameters and improvement of fracturing reconstruction effect.

The invention discloses a rotating speed analysis method based on a skeletal muscle microcosmic bionic multi-stage series rolling bearing, and relates to the technical field of mechanical transmission, and the method comprises the steps: dividing a three-layer series rolling bearing into two double-layer rolling bearings, the two double-layer rolling bearings are respectively a first double-layer rolling bearing formed by combining a first-stage bearing and a second-stage bearing and a second double-layer rolling bearing formed by combining the second-stage bearing and a third-stage bearing; the revolution speeds of the inner ring rolling bodies and the outer ring rolling bodies of the two double-layer rolling bearings and the relative speeds relative to respective middle rings are calculated; according to the mechanical principle of the rolling bearings, moment balance equations of the two double-layer rolling bearings are constructed and solved, and the rotating speed distribution relational expression of the two double-layer rolling bearings is obtained. By means of the method, analysis of the rotating speed relation and the distribution rule between all stages of bearings of the three-layer series rolling bearing is achieved.

The invention discloses a design and calculation method for a variable superheat degree refrigeration air conditioner evaporator. The method comprises the steps that the evaporation temperature t0 of the evaporator is calculated according to input calculation parameters and a preset evaporator structure; the method comprises the following steps: presetting an outlet temperature t2 according to outlet enthalpy, checking a row number Z or correcting the outlet air temperature t2 according to cooling efficiency, determining flow arrangement of an air outlet evaporator, selecting countercurrent flow or downstream flow, inputting a refrigerant inlet state (condensation temperature and supercooling degree), checking and calculating an actual evaporation temperature t0jh according to an assumed evaporation temperature t0, and in the process of checking the evaporation temperature t0jh, checking the actual evaporation temperature t0jh. And meanwhile, the pressure drop dp and the temperature drop dt1 of the refrigerant in the evaporator tube are calculated, whether the evaporation temperature t0jh and the pressure drop dp and the temperature drop dt1 of the refrigerant meet the requirements or not is checked after calculation is completed, and if not, preset parameters need to be adjusted for recalculation. According to the application, the adjusted evaporation temperature and superheat degree can be checked and calculated, and the needed refrigerant evaporation temperature and liquid volume flow can be calculated by adjusting the dryness of the outlet of the evaporator.

The present invention provides a logistics classification and sorting control method and system based on fuzzy control, which relates to the field of intelligent control technology, including obtaining multidimensional attribute information of items to be sorted, and obtaining a standardized item attribute feature vector; based on the item attribute feature vector, constructing a fuzzy set describing different sorting categories, constructing a composite membership function for the fuzzy set of each item attribute dimension, inputting the multidimensional attribute information of the item into the composite membership function of the corresponding attribute dimension, and determining the best sorting category of the item; constructing a complete fuzzy control rule base, adjusting the position, speed and acceleration of the actuator in real time, and optimizing the item sorting trajectory.

The invention provides a method for estimating the structural integrity state of a marine ceramic capacitive pressure sensor, and the method comprises the steps: building a mathematical model of a ceramic capacitor diaphragm, and enabling the mathematical model to be used for describing the deformation behavior of the diaphragm and the relation between the deformation behavior and the capacitance change under the action of external pressure; carrying out basic hypothesis analysis on the diaphragm; respectively calculating the deflection of the diaphragm in small deflection deformation and large deflection deformation, and calculating the maximum allowable strain of the diaphragm; the capacitance and capacitance sensitivity of the pressure sensor are calculated, and the relation between the capacitance variation and the pressure is obtained; and comprehensively evaluating the structural integrity of the pressure sensor by combining the deformation behavior of the diaphragm, the maximum allowable strain and the relationship between the capacitance and the pressure. According to the method, the ceramic capacitor technology is combined, numerical simulation and experimental verification are carried out by establishing a mathematical model based on finite element analysis software and a deflection deformation theory, and thus the reliability and accuracy of the sensor in practical application are ensured.

The invention discloses a special-shaped tooth type curved rake face tooth cutting cutter and a design and modeling method thereof in the field of tooth cutting cutter machining. The cutter comprises a cutter body and a plurality of cutter teeth arranged in the circumferential direction of the outer edge of the cutter body. Each cutter tooth comprises a cutting edge, a front cutter face and a rear cutter face. The cutting edge is obtained by fitting a profile point selected by a conjugate surface of the tooth surface of the special-shaped gear according to a constraint condition through a fitting curve; the rear tool face is a free-form surface formed by a series of cutting edges obtained through intersection; the rake face is a free-form surface for controlling the cutting rake angle of the cutting edge to be constant; the invention further discloses a design and modeling method of the tooth cutting cutter with the special-shaped tooth curved rake face, so that the cutting rake angle of the special-shaped tooth curved rake face is consistent with the cutting rake angle of the cutting edge, the stability of the tooth cutting cutter in the cutting process is kept, the surface quality is improved, and the machining precision is improved.

The invention provides a battery production temperature prediction method and device, electronic equipment and a storage medium, and relates to the technical field of batteries, and the method comprises the steps: obtaining the initial temperature of battery production and the battery parameters of a battery; according to the initial temperature, temperature distinguishing is carried out on the battery cell of the battery in each working step, and a plurality of temperature intervals of each working step are obtained; performing feature extraction on each temperature interval according to the battery parameters to obtain a feature data set of each temperature interval; performing polynomial fitting in each temperature interval according to the feature data set to obtain a polynomial coefficient of each process step in each temperature interval; determining a prediction model under different working steps in each temperature interval, and obtaining a prediction coefficient of each working step according to the polynomial coefficient and the prediction model; and constructing a temperature curve of each process step according to the prediction coefficient, and obtaining a production temperature change curve of the battery according to the temperature curves. The method can accurately predict the production temperature data of the battery, and improves the productivity and efficiency of the battery production line.

The invention discloses a casting mold point cooling structure design method and a casting mold point cooling structure. The casting mold point cooling structure design method comprises the following steps that the position where the shrinkage porosity risk is generated in the solidification process of an aluminum alloy product is determined; the point cooling hole position, the point cooling hole diameter range and the point cooling hole depth are determined; the width, the length and the sealing thread specification of the waterproof sheet are determined; determining the diameters of a water inlet channel and a water return channel; determining directions of a cooling water inlet channel and a water return channel. The point cooling layout can be realized when the installation space is insufficient or the original line cooling is interfered, the cooling is ensured to meet the process use requirement, and a new cooling design scheme is provided for casting the product shrinkage porosity defect.

This utility model relates to the field of bearing runout torque detection technology, and more particularly to a composite bearing runout torque measuring fixture. A composite bearing runout torque measuring fixture includes: a mounting base, balance bars respectively disposed at both ends of the mounting base, a composite flange bearing disposed between the two balance bars, and a detection component disposed at the end of one of the balance bars. The composite flange bearing is disposed close to the mounting base, and the shaft hole of the mounting base, the outer diameter of the balance bars, and the inner hole of the composite flange bearing are coaxially arranged. This utility model provides a composite bearing runout torque measuring fixture with advantages such as accurate measurement results, small error, high measurement precision, good stability and robustness, convenient assembly and disassembly, and low cost.