9results about How to "Improve operation accuracy" patented technology

This invention relates to the field of tunnel engineering, and particularly to a tunnel shotcrete design method, storage medium, and electronic device that considers spatiotemporal effects. The method includes: calculating the final value of vertical deformation pressure and the radius of the plastic zone of the surrounding rock without support based on tunnel foundation parameters and tunnel shotcrete design parameters; calculating the deformation pressure as a function of time using a deformation pressure calculation formula, combining tunnel excavation speed parameters, the radius of the plastic zone of the surrounding rock, and preset shotcrete hardening characteristic parameters; inputting the deformation pressure-time function into a shotcrete load-support structure model, calculating the safety factor of the shotcrete at each time node based on the shotcrete hardening characteristic parameters, and iteratively adjusting the tunnel shotcrete design parameters according to whether the safety factor meets preset requirements, until outputting tunnel shotcrete design parameters that meet the preset requirements. This invention dynamically calculates deformation pressure considering spatiotemporal effects and iteratively adjusts parameters to ensure the load-bearing safety of the shotcrete throughout its entire life cycle and reduces construction risks.

This invention relates to the field of integrated circuits and discloses a mixed-precision in-memory computing circuit, data processing method, and chip. The invention includes: a storage array, an index memory, and a multiply-accumulate calculation circuit. The storage array includes a first data element stored in a first precision format and / or a second data element stored in a second precision format; wherein the bit width of the first precision format is greater than that of the second precision format; the storage locations of the storage array are divided according to the bit width of the second precision format; the first data element occupies multiple consecutive storage locations; the read bit width of the storage array is an integer multiple of the bit width of the first precision format; the index memory stores the position index information of the first data element in the storage array; the multiply-accumulate calculation circuit is used to determine the precision format corresponding to the data read from the storage array based on the position index information, and performs a multiply-accumulate operation corresponding to the precision format, outputting the calculation result. This solves the compatibility problem between mixed-precision data storage and computing circuits.

The invention discloses a calculation method for adding an irregular sub-domain without a flux boundary condition in a computational domain, which comprises the following steps of: determining an irregular sub-domain of a substrate / impurity phase added in the computational domain, and drawing the irregular sub-domain into a substrate / impurity phase shape image; processing the image into data with a required model size; establishing a calculation equation of the calculation method coupled with the irregular sub-domain added with the flux-free boundary condition in the calculation domain; performing discrete difference on the calculation equation by adopting a finite difference method to obtain a discrete difference format equation; writing a phase field preposition program by applying a discrete difference format equation; importing the data into a phase field preposition program; taking an operation result of the phase field preposition program as an initial condition of a substrate / impurity phase, and importing the operation result into a constructed phase field model for describing a dendritic crystal growth process to obtain a calculation model coupled with the substrate / impurity phase with an irregular domain; a numerical solution of the calculation model is obtained through computer simulation. According to the invention, the operation efficiency and accuracy are improved.

This utility model discloses a combined synchronous display and controller utilizing AC sampling, including a current sampling circuit and a first voltage sampling circuit connected to the machine side, a second voltage sampling circuit connected to the system side, and a microprocessor. The microprocessor includes a first set of synchronous sampling AD ports and a second set of synchronous sampling AD ports. The current sampling circuit and the first voltage sampling circuit are connected to the first set of synchronous sampling AD ports, the first voltage sampling circuit is connected to the second set of synchronous sampling AD ports, and the second voltage sampling circuit is connected to the second set of synchronous sampling AD ports. By simplifying the number of sampling channels, replacing some hardware circuits with digital calculations performed by the microprocessor, and combining RC filtering with a unified bias reference, the system achieves simplified circuit structure, high sampling accuracy, strong anti-interference capability, accurate synchronization judgment, and effective electrical parameter measurement.

The invention discloses a neural network hardware acceleration method and system based on an adaptive activation function circuit, and belongs to the field of neural network hardware acceleration. The method comprises the following steps: constructing an adaptive activation function circuit by using a curve fitting method, and storing adaptive parameters through a memristor; constructing a memristor cross array, and based on the Ohm's law and the Kirchhoff's current law, converting input voltage into current output through the memristor cross array; inputting the current output into a self-adaptive activation function circuit, and performing nonlinear processing through self-adaptive parameters to obtain network layer output after self-adaptive activation function processing; the output of the network layer calculates a loss function through an off-chip calculation mode, and calculates the gradient of an adaptive parameter; the adaptive parameters in the memristor are updated according to the gradient of the adaptive parameters, and the form of the adaptive activation function is dynamically optimized. The adaptive activation function circuit accelerates model convergence more quickly by updating parameters in real time.

A calculation device (130) of a battery control device calculates a first resistance value (R1) of a secondary battery on the basis of the amount of change in a voltage value from a first time point (c1) to a second time point (c2) and the amount of change in a current value from the first time point to the second time point. Next, the change amount (beta) of the surface temperature is calculated on the basis of a first surface temperature (Ts1) in a range from the first time to the second time and a second surface temperature (Ts2) at a third time after a predetermined time (n) from the second time. Next, the amount of current of the secondary battery is calculated from the point in time at which the first surface temperature is measured to a third point in time (c3) at which the second surface temperature is measured. Then, the internal temperature of the secondary battery is estimated on the basis of the amount of change in the surface temperature and the amount of current. Then, on the basis of the internal temperature estimated with reference to the mapping table, a second resistance value (R2) in which the difference between the internal temperature and the surface temperature of the secondary battery is reflected is estimated. The degradation rate is calculated on the basis of the first resistance value and the second resistance value.

The present application relates to a flowered stereo calibration box and a camera calibration method based on an OCAM algorithm, wherein the flowered stereo calibration box comprises five checkerboards, each checkerboard is a regular row and column distributed black and white checkerboard, the bottom checkerboard is a square, the four side checkerboards are rectangles, the four side checkerboards are connected with one bottom side of the bottom checkerboard respectively, the four side checkerboards are equal to the included angle of the bottom checkerboard, and the four side checkerboards are divergent and inclined upward with the bottom checkerboard as the center; the checkerboard small grid of the bottom checkerboard is provided with a closed black frame, the black frame does not intersect with the checkerboard small grid; the three sides of the four side checkerboards which do not intersect with the bottom side of the bottom checkerboard are provided with black frames, the black frames are connected with the checkerboard small grid of the side checkerboard; and the bottom checkerboard is provided with four circular calibration points. The present application reduces the requirement for image quality, and improves the operation precision and operation efficiency of panoramic camera calibration.

The present application belongs to the technical field of computer vision, and discloses a mine car safety detection method based on multi-camera linkage, and the specific technical scheme is: six modules including a video data acquisition module, a data preprocessing module, a mine car safety behavior detection module, a multi-camera linkage module, an audible and visual voice alarm module and a data transmission module, and the six modules work cooperatively to realize efficient tracking of the mine car, the present application realizes mine car safety detection based on multi-camera linkage tracking, through installation of multiple cameras and realization of linkage, the mine car and the surrounding environment can be monitored in real time, the running state of the mine car and the surrounding situation are monitored, abnormal conditions are found in time, and thus the risk of accidents is greatly reduced; through real-time monitoring and analysis of the behavior mode of the mine car, potential safety hazards can be quickly identified, once an emergency occurs, the system immediately notifies relevant personnel, emergency measures are taken in time, and the safety of mine operation is improved.

The utility model discloses an endoscopic department specimen fixing all-in-one machine, which relates to the technical field of medical supplies and comprises an all-in-one machine outer box body, a rectangular slide way is fixedly connected to the middle of the upper part of the all-in-one machine outer box body, at least three clamping grooves are formed in the inner wall of the right side of the rectangular slide way, and a pushing assembly is arranged in the rectangular slide way. Two second sliding strips are fixedly connected to the inner bottom surface of the all-in-one machine outer box body, a temporary specimen storage frame is arranged between the two second sliding strips, a specimen input port is formed in the upper portion of the left side of the all-in-one machine outer box body in a penetrating mode, and two first sliding strips are fixedly connected to the upper portion of the interior of the all-in-one machine outer box body; and a specimen placing plate is connected between the two first sliding strips in a sliding manner. The device has the advantages that specimen photographing, image recognition, cover closing of the specimen embedding and fixing box and fixing operation are integrated, manual operation steps are reduced, the specimen processing efficiency is improved, the working intensity of medical staff is reduced, meanwhile, the data recording speed can be increased, and the treatment progress of a patient is prevented from being affected.