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36results about How to "Small amount of data" patented technology
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Topic detection method and device based on big data
ActiveCN103177090AHas the effect of backtracking detectionSmall amount of dataSpecial data processing applicationsFeature vectorNetwork behavior
The invention provides a topic detection method and device based on big data. By means of the topic detection method and device, accuracy and timeliness of detection effects can be guaranteed at the same time under the condition that a large amount of web page text is updated quickly in the internet environment. The method includes the following steps: extracting hot web pages according to user network behavior data; collecting contents of the hot web pages; extracting and acquiring web page feature vectors of the hot web pages according to the contents of the hot web pages; clustering the hot web pages according to the web page feature vectors of the hot web pages to acquire corresponding potential hot topic classes; carrying out incremental clustering on newly-added web pages with the potential hot topic classes as seed classes, wherein the newly-added web pages comprise on-line web pages; and judging whether the potential hot topic classes after the incremental clustering are hot topic classes through analyzing corresponding user attention degree parameters of the potential hot topic classes.
Owner:亿赞普(北京)科技有限公司
Repeated data deleting method and device
ActiveCN106610790ASmall amount of dataReduce occupancyInput/output to record carriersTheoretical computer scienceHash table
The invention discloses a repeated data deleting method and device, and improves system reliability of a mobile intelligent terminal. The method comprises the steps of: carrying out matching on a data fingerprint of a current data block and data fingerprints in a hotspot hash table, and if a matching result is that the data fingerprint of the current data block is consistent with one data fingerprint in the hotspot hash table, determining the current data block as repeated data; and if a matching result is that the data fingerprint of the current data block is inconsistent with the data fingerprints in the hotspot hash table, carrying out matching on the data fingerprint of the current data block and data fingerprints in a hash fingerprint table, and when a matching result is that the data fingerprint of the current data block is consistent with one data fingerprint in the hash fingerprint table, determining the current data block as the repeated data, wherein the data fingerprint of each harsh table item in the hotspot hash table is a data fingerprint of which repeated times in at least one file reach a set threshold value, and the data fingerprints of the hash fingerprint table are stored data fingerprints of all the data blocks.
Owner:HONOR DEVICE CO LTD
Method for predicating dynamic volume of sector area
InactiveCN102147982ALittle impact on accuracyEasy to collect dataAircraft traffic controlRegression analysisComputer network technology
The invention relates to a method for predicting the dynamic volume of a sector area and adopts a dynamic volume predicating method to predict the volume of the sector area. The method comprises: firstly, predicating the dynamic density of the controlled sector in the future 30 min according to the tracking information and the related data; secondly, computing and recording the number of aircrafts in the controlled sector areas in 15 time intervals; thirdly, matching the dynamic density of the sector area and the number of the aircrafts in each time interval one by one and performing regression analysis on the computed points to further determine the relationship between the dynamic density of the sector area and the number of the aircrafts in each time interval; and finally, predicting the tread of a fitted curve. When the method is adopted to measure the volume of the sector area, the individual difference of controllers have little influence on the accuracy, data are easily acquired, the data flow is small, the computer network technical platform is adopted for support, no extra capita is required, and the evaluation is simple and accurate.
Owner:CIVIL AVIATION UNIV OF CHINA
Rib fracture automatic detection method based on rib expansion diagram
InactiveCN110458799ASmall amount of dataSmall costImage enhancementImage analysisImaging processingData needs
The invention belongs to the technical field of image processing, and particularly provides a rib fracture automatic detection method based on a rib expansion diagram, and the method comprises the steps: obtaining a rib CT image of each rib based on an original CT image; obtaining a rib expansion diagram of each rib based on the rib CT image of each rib; and detecting the rib expansion diagram through the rib fracture automatic detection model to obtain the fracture position of the rib. Rib segmentation is carried out on an original CT image to obtain a rib CT image of each rib; the rib CT image of each rib is unfolded to obtain a rib unfolding image of each rib; finally, the rib expansion diagram of each rib is detected through the rib fracture automatic detection model to obtain the fracture position of the rib, through the arrangement, labeling data needed by the training model can be greatly reduced, and the speed and accuracy of rib fracture position detection can be improved.
Owner:上海皓桦科技股份有限公司
Web-based intelligent networked power monitoring and control system
InactiveCN107302588AAchieve sharingImprove scalabilityCircuit arrangementsTransmissionPower qualityContinuous measurement
The invention discloses a web-based intelligent networked power monitoring and control system, which comprises a networked power quality monitoring module and a B / S module; the networked power quality monitoring module communicates with the B / S module through a web server; the networked power quality monitoring module comprises a power quality detection module, a Web server, a database server, an application server, a substation first detection terminal, a substation second detection terminal, a substation third detection terminal and an RS-485, wherein the B / S module includes a database (SQL2005), a Web server and a user terminal (Browser). The system also includes a power quality data C / S communication process. The system has the advantages of high intelligence, capability of providing the whole network type of power quality continuous measurement, analysis, diagnosis and statistical detection, and intelligent monitoring and analysis through the Web platform and the visualized trend platform.
Owner:贵州眯果创意科技有限公司
CO2 corrosion prediction plate establishing method considering multiple factors
ActiveCN111177947AEasy dataSmall amount of dataDesign optimisation/simulationPhysicsCo2 partial pressure
The invention discloses a CO2 corrosion prediction plate establishing method considering multiple factors, and belongs to the technical field of oil and gas field corrosion protection. The method comprises the following steps: firstly, carrying out corrosion weightlessness test on steel by adopting a high-temperature and high-pressure kettle at different temperatures, CO2 partial pressures and chloride ion concentrations to obtain a corrosion rate measured value; then establishing a function relational expression and a relation curve graph of the corrosion rate, the temperature, the CO2 partial pressure and the chloride ion concentration by utilizing a nonlinear fitting method; and finally, drawing a CO2 corrosion prediction plate by integrating the obtained corrosion rate measured value,the function relational expression and the relation curve graph. The method considers the influence of various factors on CO2 corrosion, has high prediction precision and practicability, provides a reference basis for preventing corrosion failure of oil field metal facilities, and provides a technical guarantee for safe use of materials.
Owner:SOUTHWEST PETROLEUM UNIV
Escalator safety monitoring method based on YOLOv3
InactiveCN109492575ASmall amount of dataSmall amount of calculationCharacter and pattern recognitionData setNetwork model
The invention provides an escalator safety monitoring method based on YOLOv3, and the method comprises the following steps: 1, intercepting a picture with a passenger taking an escalator in a historical escalator monitoring video, marking a character part in the picture as a target region, and making a data set 1 according to a PASCAL VOC data set format; classifying according to the posture of the figure in the target area, and making a data set II according to a PASCAL VOC data set format; 2, training a YOLOv3 network model 1 by using the data set 1; Using the second data set to train a second YOLOv3 network model; 3, real-time safety monitoring is conducted on the escalator, and position coordinates of a target area are output through a YOLOv3 network model I; and the target area picture is the input of the YOLOv3 network model II to identify the postures of the passengers on the escalator. According to the technical scheme, the problems that a model is too complex and the real-timemonitoring requirement cannot be met in a traditional method for recognizing pedestrian actions on the escalator are solved.
Owner:NORTHEASTERN UNIV
Electrocardiogram (ECG) signal based identity authentication method and system
ActiveCN107888552AThe certification effect is efficient and accurateSmall amount of dataTransmissionEcg signalDictionary learning
The invention discloses an electrocardiogram (ECG) signal based identity authentication method, including a registration link and an authentication link, wherein the registration link includes the following steps: pre-storing a negative sample, pre-processing an ECG signal that is used as the negative sample, collecting a user template ECG signal, detecting the location of R waves, intercepting QTwaves, generating sparse feature templates from the intercepted QT waves by using a differential dictionary learning algorithm for sparse representation, and then evaluating an optimal sparse featuretemplate, and searching an optimal threshold; the authentication link includes the following steps: generating sparse features by using the pre-processed ECG signal, and then performing preliminary authentication based on the optimal threshold, and completing the authentication based on maximum entropy voting; and if remote identity authentication is performed, the method also includes the step of compressing data and transmitting the data to a remote authentication unit before the preliminary authentication. The ECG signal based identity authentication method disclosed by the invention is particularly suitable for the application of real-time authentication of ECG identities in remote dynamic medical treatment, and solves the problem of efficient and real-time identity authentication.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
Two-dimensional code information transmission method, device and equipment
InactiveCN106203228ABig amount of dataReduce bandwidth requirementsRecord carriers used with machinesSensing by electromagnetic radiationInformation transmissionComputer terminal
The invention discloses a two-dimensional code information transmission method and system. The method comprises the steps that two-dimensional code information is acquired; the two-dimensional code information is simplified to target two-dimensional code information according to a mapping relationship stored in a first database; a two-dimensional code is generated from the target two-dimensional code information; the two-dimensional code is displayed to a download terminal for scanning; and the two-dimensional code or the target two-dimensional code information restored from the two-dimensional code is transmitted through a network. According to the method, the problem that the two-dimensional code capacity is insufficient to describe the information content of the two-dimensional code information is solved.
Owner:BEIJING KINGSOFT INTERNET SECURITY SOFTWARE CO LTD
Sliding window business data determination method and device
ActiveCN106888107ASmall amount of dataReduce consumptionData switching networksBusiness dataSlide window
The invention discloses a sliding window business data determination method and device and aims to solve problems that the quantity of acquisition-needing data is relatively large and system resource consumption is relatively large existing when a mode is employed to determine a statistics value of business data contained in a sliding window at a certain moment in the prior art. The method comprises steps that the statistics value of the business data contained in the sliding window at the first moment is acquired; a first statistics value of the business data in a first interval is acquired, and the first interval is a time interval between the first moment and a second moment; a second statistics value of the business data in a second interval is acquired, length of the second interval is not smaller than length of the first interval, and the second interval starts from the start moment of the first moment of the sliding window; a statistics value of the business data contained in the sliding window at the second moment is acquired according to the the statistics value of the business data contained in the sliding window at the first moment, the first statistics value and the second statistics value.
Owner:ADVANCED NEW TECH CO LTD
Method and system for indicating effective area of broadcasting service
InactiveCN102291678AMeet the sending needsAvoid updatingEnergy efficient ICTBroadcast service distributionComputer networkGlobal Broadcast Service
A method for indicating a valid area of a broadcast service is disclosed by the present invention, which includes that: for a Multimedia Broadcast Multicast Service (MBMS), the network side sends configuration information of the MBMS through an air interface; wherein location information for indicating the MBMS valid is added in the configuration information. A system for indicating a valid area of a broadcast service is disclosed by the present invention at the same time, which includes that: for the MBMS, a transmission unit is used for sending configuration information of the MBMS through an air interface; wherein location information for indicating the MBMS valid is added in the configuration information. The present invention satisfies the transmission requirements of operation providers for given area services, and can help a User Equipment (UE) to shield services need not to be received and reduce power waste.
Owner:ZTE CORP
Developer contribution analysis method based on multi-aspect entity-aware model
InactiveCN106127392ADeepen understandingImprove development efficiencyResourcesSpecial data processing applicationsTotal workProject manager
The invention relates to a developer contribution analysis method based on a multi-aspect entity-aware generation model. Recursive decomposition and dynamic entity awareness are combined, and text nodes can be divided into different event nodes by means of top-down recursive application and then be divided into aspect nodes by means of recursive calling. For different development tasks that are involved, statistic data texts of the total work quality of a developer within a certain period of time and the workload and the work quality of the developer in a project are generated by decomposing all commit information submitted by the developer within a certain period of time and extracting event and aspect keywords of two texts of commit description and code modification. The present invention overcomes the shortcoming of development quality degradation of developers due to the lack of supervision on the work quality of the developers. The invention makes it convenient for project managers to grasp dynamic information of developers in time, and helps to deepen the understanding about developers, determine remuneration of developers and urge developers to improve the future work and improve the team software development efficiency.
Owner:YANGZHOU UNIV
Remote disaster recovery backup processing method and device
PendingCN105868052ABig amount of dataShorten the timeRedundant operation error correctionIncremental backupVirtual machine
The present invention provides a remote disaster recovery backup processing method and device, wherein the method includes: periodically acquiring the deployment data of a virtual machine storage volume, and determining the current period corresponding to the virtual machine storage volume according to the deployment data Incremental deployment data; store the incremental deployment data corresponding to the current cycle to a preset off-site storage address; wherein, the preset off-site storage address stores the initial data of the virtual machine storage volume and at least Incremental data for one cycle. The present invention adopts incremental backup to back up data, and each backup only needs to back up the data that has been increased or modified compared with the previous one. There is no repeated backup data among the data backed up each time, so the amount of backed up data is not large, the time required for backup is shortened, and bandwidth resources are greatly saved.
Owner:OPZOON TECH
CT system parameter calibration and imaging method based on random transform
InactiveCN109765249AHigh precisionImprove image qualityMaterial analysis using wave/particle radiationSoft x rayRelevant information
The invention particularly relates to a CT system parameter calibration and imaging method based on random transform. A calibration target composed of two uniform solid mediums is placed on a square tray, geometric information and absorptivity of the calibration target are known, and according to the calibration target and received information, the position of a CT system rotation center in the square tray, the spacing of detector units and 180 directions of X-rays are solved; the received information of the unknown medium 1 obtained by a CT system in question 1 is utilized, the correspondingdata files of the unknown medium 1 are known in advance, and the calibration parameters in the question 1 are utilized to determine the position, geometric shape and absorptivity of the unknown medium1 in the square tray; relevant information of the unknown medium 2 are obtained in the same way; and a new template is designed and a corresponding calibration model is established to improve the calibration accuracy and stability of the CT system. The CT system parameter calibration and imaging method improves the accuracy of parameters and has high imaging quality, and the method for solving each parameter is intuitive and easy to understand.
Owner:SHAANXI NORMAL UNIV
Transient security evaluation method based on boundary region importance sampling and kernel vector machine
PendingCN111401476ASmall amount of dataGenerate informativeKernel methodsCharacter and pattern recognitionSecurity assessmentEngineering
A transient security assessment method based on boundary region importance sampling and a kernel vector machine comprises the following steps: 1, obtaining a system operation sample, constructing a transient security index, and establishing a corresponding sample database; 2, sampling the sample database to efficiently generate an offline training sample set, and normalizing the offline training sample set to reduce the calculation burden of a machine; 3, constructing a transient security evaluation model of apower system, and carrying out offline training on the model by utilizing the training sample set; 4, based on the real-time operation data of the power system, completing evaluation of the real-time transient security state of the power system by using the continuously updated transient safety evaluation model to obtain a final transient stability evaluation result. The invention aims to provide the method which is beneficial to improving the speed of the training process and theprecision of the evaluation process, has higher applicability in the field of transient security evaluation of the power system, and can avoid blackout accidents.
Owner:CHINA THREE GORGES UNIV
Machine tool production abnormity alarm remote monitoring system and method based on NB-IOT
InactiveCN112180784AGuarantee safety and reliabilityMonitor running statusProgramme controlMeasurement devicesNetwork communicationChipset
The invention discloses a machine tool production abnormity alarm remote monitoring system based on NB-IOT. The system comprises a sensing layer, a platform layer, a server layer and an application layer, wherein the sensing layer comprises sensor equipment and transmission equipment, the sensor equipment forms a machine tool environment data source through a temperature and humidity sensor, a limiting sensor, a noise sensor and a smoke sensor; the transmission equipment forms an equipment automatic online data uploading module through an NB-IOT module and an MCU main control chip; the platform layer is an Internet of Things platform; the server layer comprises a database system and a remote monitoring system rear end; and the application layer is a remote monitoring system terminal. According to the invention, the sensing layer and the server layer are effectively combined, a solution is provided for the defects of short distance, high power consumption, unstable signals and the likecaused by a traditional remote monitoring wireless network communication mode, the development difficulty of connection between the traditional sensing layer and the server layer is reduced, and the timeliness, safety and reliability of real-time monitoring of the system are improved.
Owner:JIANGSU UNIV OF SCI & TECH
Page displaying method and device
ActiveCN108073609AAccurate recommendationWill not increase the burdenWebsite content managementBuying/selling/leasing transactionsClient-sideSmall data
The invention provides a page displaying method and device. The method comprises the following steps that: when an access request from the first page of a client side is received, determining the screening tag of the first page; through a first response message, sending the information of the screening tag to the client side to enable the client side to display the screening tag on the first page;when the access request, which is from the client side, of the screening tag is received, determining a second page corresponding to the screening tag; and through a second response message, sendingthe information of the second page to the client side to enable the display side to display the second page. Through the technical scheme of the invention, an object can be accurately recommended to the user, object recommendation efficiency is improved, the user is assisted in more accurately selecting the object through the tag, a server needs to process a small data size, and in addition, the burden of the server is not increased.
Owner:ALIBABA GRP HLDG LTD
A behavior recognition method based on deep learning
ActiveCN109886109AReduce training timeControl complexityCharacter and pattern recognitionEnergy efficient computingLimited resourcesTraining phase
The invention discloses a behavior recognition method based on deep learning. The method is characterized by dividing the behavior recognition into a training stage and a recognition stage, at the training phase, preprocessing the triaxial acceleration data acquired by an acceleration sensor and extracting a resultant acceleration value; obtaining a root-mean-square value of quadratic sum of three-axis acceleration of xyz, performing STFT on a resultant acceleration value to extract a relationship between time and frequency in data, and inputting an energy spectrum of an STFT sequence and a behavior tag corresponding to each collected data as a training set of a behavior recognition model; and enabling the behavior recognition model to adopt a DRNN based on an LSTM unit, training the initial model by using training set data, and selecting the training model with the highest test set classification accuracy to be applied to the recognition stage. Compared with an existing scheme, the method is higher in recognition accuracy, lower in power consumption and suitable for working at an intelligent terminal with limited resources.
Owner:NANJING UNIV OF POSTS & TELECOMM
Quick node replacement method for large-scale cluster database
InactiveCN106446031AQuick changeSmall amount of dataSpecial data processing applicationsDatabase design/maintainanceData synchronizationClustered data
The invention provides a quick node replacement method for a large-scale cluster database. The method comprises the following steps of setting an unavailable state of a node; installing an installation program of a new node replacing the node, and performing new node and cluster configuration; setting a cluster mode to be read-only, and judging whether the execution of write operation is finished or not; after the execution of the write operation is finished, synchronizing metadata; and after the metadata synchronization is finished, recovering the cluster mode to be normal, setting a synchronous data flag for user data, and performing user data synchronization according to the synchronous data flag. According to the quick node replacement method for the large-scale cluster database, the data node replacement process is divided into two steps of metadata synchronization and user data synchronization; a user is prohibited to perform the write operation on the database during the metadata synchronization period, and the user is allowed to perform all database operations during the user data synchronization period; and the data volume of database metadata is not large in general, and the synchronization time is short, so that the time in which the user cannot perform the write operation on the database can be shortened to the maximum extent.
Owner:TIANJIN NANKAI UNIV GENERAL DATA TECH
Water body steady-state time prediction method based on visual perception
The invention provides a water body steady-state time prediction method based on visual perception, and the method comprises the steps: carrying out the processing of a collected bubble image, obtaining the number of bubbles, the floating speed and the floating deviation degree, and obtaining the shaking degree of a water body based on the number of bubbles, the floating speed and the floating deviation degree; obtaining the standard time required for the water body to reach the steady state according to the water body shaking degree; constructing a steady-state time prediction model based onthe volume of the device, the water inlet speed, the water outlet speed and the speed change degree when the mechanical arm adjusts the pose of the device, fitting the steady-state time prediction model by using a fitting algorithm based on the standard time required for the water body to reach the steady state, and solving an undetermined coefficient in the model. Parameters selected by the steady-state time prediction model are easy to obtain, the data volume and the calculated amount are small when steady-state time prediction is carried out, and the predicted steady-state time is accurate.
Owner:刘灿灿
Medical information virtual reality server system, medical information virtual reality program, medical information virtual reality system, method of creating medical information virtual reality data, and medical information virtual reality data
PendingCN110300547ASmall amount of dataFacilitate communicationImage enhancementImage analysisData transformationPrivacy protection
Provided is a medical information virtual reality server system which facilitates communication between users using three-dimensional data employed in a virtual reality space, facilitates communication relating to data between joint owners thereof, is also suitable for facilitating protection of privacy and handling of data relating to persons whose data has been acquired, and also improves the usability of the data. This virtual reality server system is provided with: a data input means for inputting medical image data; a segmenting means for dividing the medical image data into segments foreach characteristic part, including living body parts, implants, medical devices, index markers and wearable objects; a three-dimension data conversion means for converting the medical image data intothree-dimensional polygon data having segments; a tagging means for tagging the three-dimensional polygon data or the segments; a coordinate associating means for associating the three-dimensional polygon data with an arbitrarily defined world coordinate position; and a data output means for storing the three-dimensional polygon data in a database and outputting the three-dimensional polygon dataon the basis of the tags with which said data have been tagged.
Owner:HOLOEYES INC
Lithium ion battery EIS low-frequency-band online measurement method based on step waves
ActiveCN112881929AReduce calculation errorsHigh precisionResistance/reactance/impedenceElectrical testingPhysicsChemistry
The invention belongs to the technical field of rapid measurement of battery impedance, and relates to a lithium ion battery EIS low-frequency-band online measurement method based on step waves. The method comprises the following steps of: determining a proper step wave step number and a current amplitude based on electrochemical reaction characteristics of a lithium ion battery and actual requirements; applying step wave current in a proper frequency range to the lithium ion battery, performing sine fitting on the sampled step wave current and response voltage to obtain an impedance value of a required low-frequency band, and then forming a low-frequency-band electrochemical impedance spectrum, namely a low-frequency-band EIS, of the lithium ion battery. According to the low-frequency-band EIS online measurement method, the low-frequency-band impedance information of the lithium ion battery can be accurately reflected; the method has the effects that the low-frequency EIS test result of the lithium ion battery is high in precision, engineering is easy to realize and the like, and effective technical support is provided for rapid evaluation and safety early warning of the health state of the battery.
Owner:BEIJING JIAOTONG UNIV
A frame synchronization automatic test method, device and readable storage medium
The present invention relates to an automatic test method, device and readable storage medium for frame synchronization, comprising the steps of: the client collects a key frame data packet of a game scene in the background, and the key frame data packet includes a key frame Hash value and a key frame operation data ; The client uploads the key frame data packet to the server; the test end downloads the key frame data packet from the server, and restores the game scene through the key frame operation data; the comparison Hash value of the key frame generated by the restored game scene will be compared Compare and verify the Hash value and the key frame Hash value; if the result of the comparison and verification is inconsistent, a prompt message is sent. This automated test method for frame synchronization key frame operation data restores the key frame of the game, calculates the Hash value, and compares the Hsah value with the downloaded key frame Hash value to determine whether there is a frame synchronization problem. The technical solution can quickly expose frame synchronization bugs, and the amount of data packets is not large, which will not cause an excessive burden on the system.
Owner:深圳易帆互动科技有限公司
GNSS local positioning error space modeling method
ActiveCN110109152ASmall amount of dataTransmission newSatellite radio beaconingSimulationMarine navigation
The invention discloses a GNSS local positioning error space modeling method. Error extraction and analysis are carried out through position data generated by a user daily, the navigation terminal canthus recognize an urban GNSS non-visible area without additional equipment support, and the error statistical experience parameters of the corresponding position are given. When the model is used, aslong as the approximate position of the current user is known, the current GNSS local error statistical parameter value can be queried, the model has a small amount of data, and transmission and updating between the network side and the terminal side is facilitated.
Owner:ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
On-line measurement method of lithium ion battery eis low frequency band based on ladder wave
ActiveCN112881929BSine wave precisionReduce calculation errorsResistance/reactance/impedenceElectrical testingElectrical batteryLow frequency band
The invention belongs to the technical field of rapid measurement of battery impedance, and relates to an on-line measurement method for lithium-ion battery EIS low-frequency band based on ladder waves, which includes determining the appropriate number of steps and current amplitudes of the ladder waves based on the electrochemical reaction characteristics of the lithium-ion battery and actual needs. ; Apply a ladder wave current in a suitable frequency range to the lithium-ion battery, and perform sinusoidal fitting on the sampled ladder wave current and response voltage to obtain the required low-frequency impedance value, and then form the low-frequency electrochemical impedance spectrum of the lithium-ion battery. , that is, low-band EIS. The low-frequency EIS online measurement method can accurately reflect the low-frequency impedance information of lithium-ion batteries; it has the effects of high accuracy of low-frequency EIS test results of lithium-ion batteries, easy engineering implementation, etc., and provides effective technical support for rapid battery health assessment and safety warning .
Owner:BEIJING JIAOTONG UNIV
Small-spacing LED full-color synchronous screen receiving board and working method thereof
PendingCN114863869AEasy to handle workEasy to handleColor signal processing circuitsStatic indicating devicesData packDot matrix
The invention discloses a small-spacing LED full-color synchronous screen receiving board and a working method thereof, and the method comprises the steps: designing to-be-processed contents, interfaces and resources of an FPGA and a single-chip microcomputer according to a data structure of a network packet, a to-be-displayed image and an LED display screen architecture, and obtaining an overall architecture of the FPGA and an overall architecture of a small-spacing LED full-color synchronous screen receiving board system; receiving a data packet by using a single chip microcomputer, performing command analysis on a command part of the data packet, and sending a control command through an SPI (Serial Peripheral Interface) bus; receiving a control command by using the FPGA overall architecture, and processing data according to the control command; receiving corresponding image data according to the control command and processing the image data; performing image correction on the processed image data; the FPGA is used for controlling an LED dot matrix scanning signal, and the HUB75 interface is used for controlling an LED driving chip to lighten a corresponding pixel. According to the invention, the characteristics of the single-chip microcomputer and the FPGA are combined, so that the processing work of data and commands of the sending card can be better completed.
Owner:XI AN JIAOTONG UNIV
A method and system for identity authentication based on electrocardiographic signals
ActiveCN107888552BThe certification effect is efficient and accurateSmall amount of dataTransmissionEcg signalDictionary learning
The invention discloses an electrocardiogram (ECG) signal based identity authentication method, including a registration link and an authentication link, wherein the registration link includes the following steps: pre-storing a negative sample, pre-processing an ECG signal that is used as the negative sample, collecting a user template ECG signal, detecting the location of R waves, intercepting QTwaves, generating sparse feature templates from the intercepted QT waves by using a differential dictionary learning algorithm for sparse representation, and then evaluating an optimal sparse featuretemplate, and searching an optimal threshold; the authentication link includes the following steps: generating sparse features by using the pre-processed ECG signal, and then performing preliminary authentication based on the optimal threshold, and completing the authentication based on maximum entropy voting; and if remote identity authentication is performed, the method also includes the step of compressing data and transmitting the data to a remote authentication unit before the preliminary authentication. The ECG signal based identity authentication method disclosed by the invention is particularly suitable for the application of real-time authentication of ECG identities in remote dynamic medical treatment, and solves the problem of efficient and real-time identity authentication.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
Method for predicating dynamic volume of sector area
InactiveCN102147982BLittle impact on accuracyEasy to collect dataAircraft traffic controlRegression analysisComputer network technology
The invention relates to a method for predicting the dynamic volume of a sector area and adopts a dynamic volume predicating method to predict the volume of the sector area. The method comprises: firstly, predicating the dynamic density of the controlled sector in the future 30 min according to the tracking information and the related data; secondly, computing and recording the number of aircrafts in the controlled sector areas in 15 time intervals; thirdly, matching the dynamic density of the sector area and the number of the aircrafts in each time interval one by one and performing regression analysis on the computed points to further determine the relationship between the dynamic density of the sector area and the number of the aircrafts in each time interval; and finally, predicting the tread of a fitted curve. When the method is adopted to measure the volume of the sector area, the individual difference of controllers have little influence on the accuracy, data are easily acquired, the data flow is small, the computer network technical platform is adopted for support, no extra capita is required, and the evaluation is simple and accurate.
Owner:CIVIL AVIATION UNIV OF CHINA
Method and device for determining sliding window service data
ActiveCN106888107BReduce consumptionSmall amount of dataData switching networksSlide windowResource consumption
Owner:ADVANCED NEW TECH CO LTD
A multifactorial co 2 Corrosion Prediction Chart Establishment Method
ActiveCN111177947BEasy dataSmall amount of dataDesign optimisation/simulationPhysical chemistryOil field
The invention discloses a CO that considers multiple factors 2 The invention discloses a method for establishing a corrosion prediction chart, belonging to the technical field of corrosion protection of oil and gas fields. The method includes: first, at different temperatures, CO 2 Under the partial pressure and chloride ion concentration, the corrosion weight loss test of steel was carried out in a high temperature autoclave to obtain the measured value of the corrosion rate; then the nonlinear fitting method was used to establish the relationship between the corrosion rate and temperature, CO 2 The functional relationship and relationship curve of partial pressure and chloride ion concentration; finally, the measured value of corrosion rate, functional relationship and relationship curve obtained above are combined to draw CO 2 Corrosion prediction chart. This method takes into account a variety of factors for CO 2 The impact of corrosion has high prediction accuracy and practicability, which provides a reference for preventing corrosion failure of metal facilities in oilfields, and provides a technical guarantee for the safe use of materials.
Owner:SOUTHWEST PETROLEUM UNIV
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