36results about How to "Overcome the disadvantage of slow speed" patented technology

The invention discloses an FPGA dynamic power consumption estimation method based on a BP neural network. The FPGA dynamic power consumption estimation method comprises the following steps that (1) the input and output quantities of four modules are obtained as sample data; (2) data screening and data preprocessing are carried out on the sample data; (3) BP neural network models of the four modules are respectively constructed according to the processed sample data; (4) part of the sample data are adopted as the training data of the BP neural network, the trained neural network is obtained after BP neural network training is carried out, and then power consumption of neural network output is obtained; (5) the sample data with the training data removed are adopted as the testing data of the BP neural network, and the obtained power consumption is compared with the testing data; (6) the power consumption output by the neural network is restored to be actual power consumption values; (7) the obtained power consumption estimation values of the four modules are summated to obtain a total power consumption value. The power consumption values can be accurately predicted through automatic study of the BP neural network.

The present invention discloses a rapid simulation method of repeat-pass spaceborne natural scene SAR complex image data. According to the method, an SAR satellite orbit is simulated, the ground scene is simulated according to the spaceborne SAR satellite imaging principle and an SAR satellite single looking complex image signal model, and multi-frame repeat-pass SAR complex image data are directly obtained. Slant-range information is obtained by using a rapid method to iteratively compute a satellite zero doppler imaging position, a backscattering coefficient is calculated by using a simplified scattering model, and a simplified repeat-pass model is provided to generate any multi-frame SAR complex image data with base length controllable. The disadvantage that speed of a traditional echo simulation method is slow is overcome, and prior information can also be provided for interference processing so as to assist in processing or evaluating a processing result.

The invention discloses a test method and system of a control storage chip. The method comprises: pre-storing, by a CPU (central processing unit), a first address and first data in an interface simulation accelerator through a system bus; transmitting, by the interface simulation accelerator, the first address and the first data to a storage interface control module through a data bus; writing, by the storage interface control module, the first data into a storage unit, corresponding to the first address, of a storage chip; reading, by the interface simulation accelerator, data stored under the first address through the data bus to obtain second data; acquiring, by the CPU, the second data from the interface simulation accelerator, judging whether the second data and the first data are identical or not, and giving a pass to the test if yes. The test method and system according to the technical scheme disclosed herein have the advantages that the interface simulation accelerator is innovatively designed by combining the speed of hardware test with flexibility and controllability of software simulation test, and comprehensive rapid verification of a storage interface control module is achieved via the interface simulation accelerator.

The invention relates to a nanometer device and a nanometer machining technology, in particular to the structure of a radio-frequency single-electron transistor scanning probe and application thereof. The radio-frequency single-electron transistor scanning probe comprises an SOI (silicon on insulator) substrate of which one end has a needle-shaped lug boss, and a radio-frequency resonant circuit and a single-electron transistor integrated on the SOI substrate and matched with each other; and the single-electron transistor is integrated on the needle-shaped lug boss of the SOI. The invention further provides a manufacture method of the radio-frequency single-electron transistor scanning probe and a charge scanning imaging and oscillography and atomic power showing imaging system manufactured by the radio-frequency single-electron transistor scanning probe. The system is high in sensitivity, high in speed and high in spatial resolution, can form into the distribution morphology and the geometric morphology of the charge by means of low-temperature three-dimensional scanning, and can detect the electric potential and the dynamic change of the electric potential at any one point in the nanometer device or circuit at fixed points.

The invention provides a method for file storage in continuous space of a flash memory in an equal probability manner, wherein the storage times of storage units are controlled by sequencing the storage times, and on the basis, the storage units with same storage times are subjected to continuous space sequencing to control the continuity of file storage and realize the continuous sequencing of the storage units according to the quantity from most to least. The method comprises the following steps of: supervisory sequence storage area formatting, file storage and file deletion. According to the method disclosed by the invention, the storage units with same storage times are sequenced on the basis of the storage times sequencing, the defects that the traditional file storage operation is unbalanced and a speed of a flash file storage system is low are overcome, the service life of the file storage space is prolonged, the access efficiency of the file storage space is improved, and favorable performance and practicability are achieved.

The invention provides a multilayer continuous elevator capable of continuously conveying a large number of cargoes and meanwhile capable of carrying out conveying in a one-point-to-multipoint manner. A table board is fixed to a chain set, chains are wound around in a combined manner through chain wheels, and on an inlet, through chain wheel redirection, platform face cargo carrying is formed; then, the table board vertically ascends or descends, and on an outlet, the cargoes are output through chain wheel redirection; when a floor inlet or outlet needs to be changed, a lifting car is lifted to reach the new position, and braking fixation is achieved; in the aspect of chain cycle, the table board is fixed to the four chains, and during ascending, a cargo carrying platform is formed; the front row of chains and the rear row of chains are arranged in a staggered manner, the front row of chains and the rear row of chains output the cargoes on the same plane, and through chain wheel redirection, the table board carries out conveying in the vertical direction; a balancing weight is additionally arranged on one side of the lifting car, a lifting motor drives a car body to wholly ascend or descend, driven chain wheels are arranged on the conveying chains winding around the car body, the car body ascends and descends, and chain wheels in the car body are driven along with ascending and descending of the car body; and when the elevator reaches the needed position, the motor stops and carries out braking.

The invention provides a WEB service matching method based on an overlapped oriented graph and relates to the field of computer information analysis and data processing. Description files (WSDL) of a large amount of WEB service nodes are loaded into a server side internal memory to form massive amounts of WEB description source data, a vacancy seed matching model for matching of specified service is built, the overlapped oriented graph is constructed on the basis, seeds are evaluated through two key indexes including connectivity and overlapping number to find optimal seeds, the WEB service matching is finished finally, and the WEB service matching method is quick in finding and appropriate. The WEB service matching method can be widely applied to an environment with a large amount of WEB service nodes and high WEB service finding requirement, such as a service oriented architecture (SOA) and a cloud computing environment.

The invention discloses a mildew-proof treatment coating for printed wrapping paper for artistic design. The mildew-proof treatment coating is prepared from components in parts by weight as follows: 25-30 parts of water-based acrylic modified polyurethane resin, 10-20 parts of p-hydroxybenzoate, 20-30 parts of silver-loaded zeolite, 1-3 parts of sodium bicarbonate, 5-10 parts of stearamide, 10-15 parts of a plant anti-bacterial liquid, 1-3 parts of anise oil and 3-5 parts of a surfactant, wherein the plant anti-bacterial liquid is prepared from components of raw materials in parts by weight as follows: 20-30 parts of flos caryophylli, 15-20 parts of cortex hibisci, 10-15 parts of rhizoma kaempferiae, 10-15 parts of herba eupatorii and 3-5 parts of herba schizonepetae. The invention further provides a preparation method of the mildew-proof treatment coating for the printed wrapping paper for artistic design. A chemical mildew-proof bactericide is combined with a plant mildew-proof bactericide for use, the defects of the bactericides used separately are overcome, the two bactericides are matched in use and have a synergistic function, and the mildew-proof treatment coating has a wide prospect.

The invention discloses a fast watershed detection method for a circular mark in a helicopter blade image, which comprises the following steps: 1) constructing a parallel processing frame; 2) fast extracting local extremum features based on image downsampling; 3) identifying the local extremum of the circular mark based on the preset pattern; 4) performing fast marking of the region of interest (ROI) of the circular mark based on a lookup table; 5) performing ROI local gradient calculation; 6) performing ROI local watershed transform. The invention has the advantages that the single pixel linewidth continuous edge of all circular marks in the low-exposure blade image can be accurately extracted, and the detection efficiency of the circular marks in the helicopter blade image is improved; at the same time, the method has the advantages of strong anti-jamming ability and high degree of automation, and can be used to detect and locate circular marks in the visual measurement of helicopterblade motion parameters.

The invention relates to a high-precision advance aiming angle compensation device for satellite optical communication, which relates to an advance aiming compensation device in a satellite optical communication device. It overcomes the disadvantages of relatively complex actuators and slow dynamic response in the prior art. It consists of an arithmetic processor (1), a drive controller (2), an aiming actuator (3) and an angle sensor (4). The output of (1) is connected to an input of (2), and the output of (2) The terminal is connected to the input terminal of (3), (4) is set on (3), the output terminal of (4) is connected to the other input terminal of (2), and (3) is formed by the No. 1 piezoelectric ceramic column (3-1) , No. 2 piezoelectric ceramic column (3-2), worktable body (3-3), worktable surface (3-4) and flexible hinge (3-5), (3-5) is fixed on (3-4 ) on the edge of the lower surface and (3-3) on the edge of the upper surface, (3-1), (3-2) are set inside (3-3), (3-1) and (3-2) on the The end face abuts on the lower surface of (3-4), and (3-5) is arranged on the side of (3-1) and (3-2) and has an equal distance from them.

The invention discloses a fast automatic gain control method of an intermediate-frequency digital receiver. The method comprises the following steps: firstly acquiring a signal intensity posterior knowledge table to judge signal intensity, and then acquiring an attenuation parameter posterior knowledge table, recording AD values of intermediate-frequency output peaks of the signals with differentintensities under various attenuation conditions of a radio frequency front-end device as the attenuation parameter posterior knowledge table, wherein the attenuation parameter posterior knowledge table is used for querying the attenuation gear stage needing to be set by the radio frequency front-end device when the AD value of the signal peak at a certain intensity is located in a specified range. When the signal is relatively small, once setting and querying process can be performed so as to reduce the attenuation degree of the radio frequency front-end device after the first setting and querying. But the frequency needing to be set is located within trice, and the fast automatic gain control of the receiver is realized.

The invention belongs to the field of unmanned aerial vehicle communication, and relates to an unmanned aerial vehicle system based on a variable message format data link and a communication method. The system comprises a man-machine interaction module, a message generation module, a segmentation/recombination module, a sending module, a receiving module and a message analysis module. Data element extraction and data element dictionary query are carried out on a message needing to be sent, so that the function domain to which the message belongs, the message number and the message content are obtained, a binary message is generated according to the function domain to which the message belongs, the message number and the message content, the length of the message is changed along with the size of useful information, the data sending amount is reduced, and limited bandwidth resources are saved. In addition, a UDP protocol is adopted for transmission, and a segmentation/recombination mechanism and a retransmission confirmation mechanism are added, so that the transmission reliability is ensured.