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

The invention discloses a fast automatic gain control method for an intermediate frequency digital receiver. Firstly, a posteriori knowledge table of signal strength is obtained to judge the signal strength, and then a posteriori knowledge table of attenuation parameters is obtained, and signals of different strengths are transmitted to a radio frequency front-end device. The AD value of the intermediate frequency output peak value under each attenuation condition is recorded, and used as an attenuation parameter a posteriori knowledge table to query the attenuation level set by the RF front-end device when the AD value of the peak value of a certain intensity signal is within the specified range. When the signal is small, after the first setting and query, the attenuation degree of the RF front-end device will be reduced to perform a setting and query process. But in general, the number of times to be set can be locked within 3 times to realize fast automatic gain control of the receiver.

The present invention provides a WEB service matching method based on overlapping directed graphs, which relates to the field of computer information analysis and data processing. By loading a large number of WEB service node description files (WSDL) into the server-side memory, a large number of WEB descriptions are formed. In order to match the source data to the specified service, a vacancy seed matching model is established, and an overlapping directed graph is constructed on this basis, and the seeds are evaluated by the two key indicators of connectivity and overlapping number, and the optimal seed is found, and finally completed Matching of WEB services is a method to quickly find suitable WEB services. The present invention can be widely applied in environments where there are a large number of WEB service nodes and the search for WEB services is highly required, such as service-oriented architecture (SOA), cloud computing and other environments.

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 invention belongs to the technical field of melon cultivation, and specifically relates to a patent application for a triple PCR identification method for identifying the purity of melon seeds. The method is used for the identification of the purity of the hybrid species, and specifically includes the steps of extracting the DNA of the material to be tested, performing triple PCR amplification, electrophoresis detection, analysis and evaluation, and the like. The triple PCR method for quickly identifying the purity of melon seeds provided by the present application can not only identify multiple sites in the same reaction at the same time, thereby shortening the working time, but also reducing the consumption of reagent consumables by multiples. When the method of the present invention is used to identify the purity of melon seeds, it can effectively overcome the slow defect of traditional single PCR in the identification of seed purity, and has the characteristics of short time, good specificity, high accuracy, low cost and wide applicability. The purity of the melon seed material can be known simply and quickly, so that the follow-up germplasm resource analysis and breeding work can be carried out more targetedly.

A high-throughput micro-droplet generation device and method regulated by surface acoustic waves, the device includes an interdigital transducer, an arc-shaped interdigital electrode is fabricated on the interdigital transducer, and the upper part of the interdigital transducer is bonded with PDMS microchannel system, the PDMS microchannel system is formed by bonding the top PDMS flow channel, the middle layer PDMS flow channel and the bottom PDMS flow channel; the method is to first fix the device on the stage of the microscope, and inject the dispersed phase through the syringe pump. Adjust the corresponding flow rate with the continuous phase. At each T-shaped micro-channel in the device, the continuous phase will cut the dispersed phase into micro-droplets, and then press the "output" button of the signal generator, and the interdigital transducer will Converging surface acoustic waves are generated, and the sound pressure field acts on the continuous phase to increase the corresponding flow resistance, which acts as an acoustic valve to regulate the flow rate of the continuous phase, thereby realizing the regulation of the droplet size; the present invention ensures high-flux generation of droplets while , by adjusting the amplitude and frequency of the input sinusoidal voltage, the generation size of micro-droplets can be flexibly and real-time controlled.

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 three-dimensional microfluidic device and method for generating high-flux micro-droplets. The device comprises a closed type flow channel structure formed by bonding a bottom-layer PDMS flow channel, a middle-layer PDMS flow channel and an upper-layer PDMS flow channel; the closed type flow channel structure is provided with a dispersed phase inlet connector, a continuousphase inlet connector and a collection outlet connector; the method comprises the following steps: fixing the three-dimensional microfluidic device on an objective table of a microscope and starting an injection pump; firstly, adjusting a dispersed phase and a continuous phase to corresponding flow speeds through the injection pump; and shearing the dispersed phase into the micro-droplets by the continuous phase on each T-shaped flow channel array for generating the micro-droplets in the device. By adopting the three-dimensional microfluidic device and method for generating the high-flux micro-droplets, the disadvantage that the speed for generating the micro-droplets by a two-dimensional flow channel at present is slow is overcome, and the generation of high-flux micro-droplets is realized; the whole structure is PDMS and is very firm after the PDMS is mutually bonded, so that a phenomenon that the flow channels are cracked due to excessive pressure of input fluid between the flow channels is avoided; and the PDMS is thoroughly transparent so that the device is easier to observe.

This invention relates to satellite light communication high precision aiming at angle advance compensation arrangement, which composed of the computing processor (1), driving controller (2), aiming operating structure (3) and angle sensor (4), the outlet of (1) connects with one inlet of (2), the outlet of (2) connects with the inlet of (3), (4) is arranged on (3), the outlet of (4) connects withthe other inlet, (3) is composed of number one piezo-electric ceramic pole (3-1), number two piezo-electric ceramic pole (3-2), working platform (3-3), working platform (3-4) and flexble hinge (3-5), (3-5) is fixed at the edge of the (3-4)'s down face and (3-3)'s upper face, (3-1), (3-2) are arranged in (3-2), (3-1) and (3-2)' upper face prop up the down face of (3-4), (3-5) is arranged at (3-1)and (3-2)'s sides and has the same distance with (3-1) and (3-2).

The present invention provides a method and device for realizing information demodulation in wavelength label technology. The method includes: sampling an optical signal with a wavelength label at a specified sampling rate; performing frequency analysis on the collected data to obtain the frequency spectrum of the wavelength label signal; Separate the spectrum of each modulation frequency from the spectrum of the wavelength label signal; calculate the average power spectrum of each modulation frequency in a specified time period in real time; respectively from a range that is larger than the specified multiple of the average power spectrum of each modulation frequency, Find the spectrum of the maximum value; obtain the synchronization head of the wavelength label corresponding to the modulation frequency according to the sampling time information corresponding to the spectrum of the maximum value. The invention utilizes the wavelength division multiplexing system of the wavelength label technology to realize the fine control of the modulation depth of the wavelength label signal, and overcomes the disadvantages of low efficiency of synchronous demodulation and slow information transmission rate of the wavelength label.