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178results about How to "Reduce operational overhead" patented technology
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Power weight quantification-based nerve network forward operation hardware structure
InactiveCN106066783AReduce storageReduce operational overheadDigital data processing detailsResource schedulingConvolution
The invention provides a power weight quantification-based nerve network forward operation hardware structure comprising the following elements: an input buffer memory module used for caching input data and nerve network power weight transferred to a chip from a global memory, wherein the nerve network power weight comprises a convolution core and a full-connecting matrix; a computing module used for carrying out convolution and full-connecting matrix vector multiplying operation based on power weight quantification; an output buffer memory module used for caching the convolution and full-connecting matrix vector multiplying operational result obtained by the computing module; a control module used for carrying out data transfer and operational resource scheduling for the input buffer memory module, the computing module and the output buffer memory module. The power weight quantification-based nerve network forward operation hardware structure can effectively reduce the nerve network memory space, and can effectively reduce nerve network operational expenses, thus obviously improving the application space of the nerve network calculating system on the terminal equipment.
Owner:HUAWEI TECH CO LTD +1
Method and system for passenger flow statistics based on cameras with intelligent analysis function
InactiveCN103986910ARelieve stressEasy to integrateImage analysisClosed circuit television systemsImage detectionFalse detection
The invention discloses a method for passenger flow statistics based on cameras with the intelligent analysis function. The method comprises the following steps that video series images are obtained, graying is conduced, and then images with a corresponding gray scale are obtained; an image detecting area is set, and a marking line for counting triggering is set in the image detection area in the statistics direction; a moving target position area in the video series images is determined; target detection is conducted on the moving target area, and the position information of targets obtained through identification is stored; movement predication and tracking are conducted on the detected targets, and passenger flow statistics is triggered according to the movement trails of the targets and the marking line. The invention further discloses a system for passenger flow statistics based on the cameras with the intelligent analysis function. By the adoption of the method and system for passenger flow statistics based on the cameras with the intelligent analysis function, a classifier is obtained through training and learning of machines and used for detecting the targets, the problems that the recognition rate is low, and missing detection and false detection are caused are effectively solved, operation cost is small, and the demand for real-time performance can be met; the method and system for passenger flow statistics based on the cameras with the intelligent analysis function are suitable for passenger flow statistics in various scenes.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI
Method, client, server and system for refreshing partial page modules
InactiveCN104778211AReduce operational overheadFast response timeTransmissionSpecial data processing applicationsClient-sideServer-side
The invention provides a method, a client, a server and a system for refreshing partial page modules. Preferably, the method applied to the client comprises the steps that when the partial page modules of a browser need to be refreshed, identifications of the partial page modules which need to be refreshed are sent to the server through a message channel by utilizing a page refreshing request; rendering results, which are fed back by the server, of the partial page modules are received through the message channel; the corresponding partial page modules on the browser are updated by utilizing the rendering results of the partial page modules. Secondly, the other method applied to the server comprises the steps that the page refreshing request which is sent by the client is received; the page refreshing request is resolved, so as to obtain the identifications of the partial page modules which need to be refreshed; the corresponding partial page modules are rendered according to the identifications of the partial page modules which need to be refreshed, so as to obtain the rendering results; the rendering results of the partial page modules are fed back through the message channel. According to the method, the client, the server and the system, the refreshing of the partial page modules is realized on the premise that research and development costs are not additionally increased.
Owner:MICRO DREAM TECHTRONIC NETWORK TECH CHINACO
A dual graph encryption method based on fraction rank Fourier conversion
InactiveCN101150402AReduce in quantityImprove impactImage data processing detailsSecuring communicationWhite noiseImage based
This invention puts forward a method for encrypting double images based on fractional stage Fourier transformation, which disorders pixels of one of two original images, then carries out pure phase coding to the disordered result to multiply the other original image to generate a composite image with a duplicate swing and then makes fractional stage Fourier domain double random phase coding and encryption to get an encrypted image having generalized stable white noise approaching to gaussion distribution, which presents a method for reducing errors by threshold value by analyzing influence to decryption result by disturbance.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Time-domain joint estimation method for synchronizing frames, frequencies and fine symbols for orthogonal frequency division multiplexing (OFDM)
ActiveCN102065048AReduce complexityReduce operational overheadMulti-frequency code systemsTime domainEstimation methods
The invention discloses a joint estimation method for synchronizing frames, frequencies and fine symbols for orthogonal frequency division multiplexing (OFDM). The method comprises the following steps: carrying out autocorrelation operations of small point length and big point length on base band data sequences at the receiving terminal in parallel; jointly determining the frame synchronization position in real time and in parallel according to the small point autocorrelation peak and the big point autocorrelation peak; computing integer frequency offset coarse estimation value and decimal fraction frequency offset coarse estimation value according to the small point autocorrelation peak and the big point autocorrelation peak; estimating the final frequency offset detection value from the integer frequency offset coarse estimation value and the decimal fraction frequency offset coarse estimation value with a frequency offset dereferencing decision device; carrying out frequency offset correction on the base band data sequences according to the estimated final frequency offset detection value; and carrying out cross-correlation on the corrected base band data sequences and the local data sequences and determining the accurate fine symbol synchronization position through the cross-correlation peak. The contradiction of complex system measure function hardware design in the traditional time-domain joint estimation systems is solved by using the method.
Owner:浙江科睿微电子技术有限公司
Data center energy saving method based on central processing unit (CPU) dynamic frequency modulation technology
ActiveCN103488539AGuaranteed real-timeReduce operational overheadEnergy efficient ICTResource allocationData centerDynamic management
The invention relates to a data center energy saving method based on a central processing unit (CPU) dynamic frequency modulation technology. The method includes two stages of initialization arrangement and dynamic management of a virtual machine. The method is different from methods in the prior art, a virtual machine arrangement technology used by energy saving of a data center is divided into the two stages of initialization arrangement and dynamic management. The initialization arrangement is applicable to the occasions of operation beginning and regular integral adjustment of the data center. The adopted method achieves the overall effect and the long-term effect due to time permission. The dynamic management is used for local management or moving facing different tasks during data center operation. The adopted method relates to local resource and ensures real-time performance.
Owner:BEIJING JIAOTONG UNIV
Time domain combined estimate method for time coarse synchronization and frequency precise synchronization
ActiveCN102025671AReduce complexityReduce operational overheadMulti-frequency code systemsTime domainTime delays
The invention discloses a time domain combined estimate method for time coarse synchronization and frequency precise synchronization in the orthogonal frequency division multiplexing (OFDM) system, which comprises the steps of: concurrently performing autocorrelation operation of small points length and autocorrelation operation of large points length on the base-band data sequence of a receiving end, concurrently determining the time coarse synchronization position through small points autocorrelation peak value and large points autocorrelation peak value at real time, and at the confirmation point of the time coarse synchronization position, determining the frequency detection result according to small points autocorrelation peak value and large points autocorrelation peak value. The invention improves the detection precision, solves the problem that the traditional time domain synchronization information can not detect the integral-multiple frequency offset so as to influence the precision of the subsequent time fine synchronization and the inaccurate integral-multiple frequency offset estimate and the symbol fine synchronization of the time frequency combined estimate method influence mutually, and solves the problem of long time-frequency synchronization time-delay and high operation cost.
Owner:浙江科睿微电子技术有限公司
Urban traffic jam distinguishing method based on RFID technology
ActiveCN103473928ALarge amount of informationReduce operational overheadDetection of traffic movementSimulationTraffic flow
The invention relates to the technical field of traffic information and provides an urban traffic jam distinguishing method based on an RFID technology. The urban traffic jam distinguishing method comprises the steps of reading data of RFID tags installed on passing automobiles through RFID readers arranged at urban intersections, and obtaining driving information; setting a statistics time interval as T, performing matching on the driving information obtained through two RFID readers, and obtaining the number of automobiles passing through a road segment between the two RFID readers within the T time period and the driving information; performing data preprocessing to remove abnormal data; calculating the stroke speed and the average stroke speed of every automobile; obtaining a traffic flow state characteristic value; and distinguishing traffic jams according to the traffic flow state characteristic value D. Compared with other jam distinguishing methods, the urban traffic jam distinguishing method is simple in algorithm, small in operation spending, quick in operating speed and low in achieving difficulty, and more accurate judgment results can be obtained.
Owner:重庆科知源科技有限公司
Patrol completion degree evaluation and calculation method
ActiveCN104537724AAvoid calculationReduce operational overheadChecking time patrolsShortest distanceShort distance
The invention relates to a patrol completion degree evaluation and calculation method, and belongs to the technical field of real-time monitoring management. The method includes the steps of determining a patrol route by obtaining positioning data of a detected device, setting the effective patrol range according to the positioning data of the detected device, judging whether the positioning coordinates of patrol personnel are within the effective patrol range of the detected device or not by collecting the positioning coordinates of the patrol personnel in real time, conducting distance measurement and calculation when the patrol personnel enters the effective range, recording the shortest distance to serve as effective data for patrol evaluation, and not conducting distance measurement or calculation for the personnel and devices if the patrol personnel does not enter the effective range or moves out of the effective range. A large amount of unnecessary system calculation is avoided so that the system operation expenses can be reduced, and the effect is quite obvious especially for large patrol systems.
Owner:SHANDONG SENTER ELECTRONICS
Interest model update method facing to odd discovery recommendation
InactiveCN101339563ADiscover and respond to changes in interestReduce loadSpecial data processing applicationsPersonalizationModel modification
The invention discloses an odd-finding-recommendation-oriented interest model updating method, which is used in a portal personalized recommendation service system; the invention is characterized in that: the odd-finding-recommendation-oriented interest model updating method comprises a long-term interest model modification rule LMR, a long-term interest model update rule LUR, a short-term interest model structure / update rule SUR, and an interest drifting detection rule IDR. The user interest model updating method of the invention can partly update interest description of the user, obtain the short-term interest situation of the user easily, satisfy the need of the odd finding recommendation, and realize the efficient and accurate updating of a user interest model; and moreover, the method can identify and process noise data, and avoid influences of the noise data on the stability of the user interest model when quickly responding to interest drifting at the same time. The updating method of the invention can identify and process the noise data, thus improving the accuracy and the stability of the user interest model.
Owner:BEIHANG UNIV
Wireless camera sensor network position and posture calibration method for wireless camera sensor network
ActiveCN105931229ASimplify calibration workQuick calibrationImage enhancementImage analysisFeature point matchingWireless camera
The invention discloses a wireless camera sensor network position and posture calibration method for a wireless camera sensor network, and the method comprises the steps: enabling an unmanned plane carrying a photoelectric identification to enter a region covered by the wireless camera sensor network; taking a plurality of pictures comprising the photoelectric identification at equal intervals in a recognition range of one wireless camera sensor; carrying out the decoding of the photoelectric identification, extracting the pictures which have no overlapped view and are taken by the wireless camera sensor at three different moments, solving and obtaining the position and posture information of the wireless camera sensor; carrying out the feature matching of the wireless camera sensors which have an overlapped view, calculating an intrinsic matrix, decomposing and obtaining a rotation matrix; solving and obtaining the position and posture information of the wireless camera sensors which have the overlapped view, and determining the rotation matrix and a translation amount. The method achieves the quick, simple and precise calibration of the wireless camera sensor, and the wireless camera sensor network calibrated through the method can be quickly applied to disaster relief and other situations where the cameras need to be calibrated.
Owner:NORTHEASTERN UNIV
Interactive face in vivo detection method and device based on multi-task self encoder
InactiveCN106022264AImprove versatilityImprove generalization abilitySpoof detectionPattern recognitionFace detection
The invention discloses an interactive face in vivo detection method and device based on a multi-task self encoder. The method comprises the following steps: carrying out face detection and tracking by a camera to acquire a face image; indicating a user to perform a specified action; carrying out face key point detection and face organ state judgment through the multi-task self encoder according to the acquired face image; carrying out face position tracking by the multi-task self encoder, judging whether the user performs the specified action through a video within a period of time, and meanwhile acquiring a user image; repeating steps S2-S4, and judging whether the in vivo detection is successful according to the accomplishment condition of the specified action of the user after a preset time. In the method disclosed by the invention, a key point can be positioned, and various specified actions can also be naturally judged by the multi-task self encoder, the image and video attacks in the in vivo detection can be effectively prevented without adding additional model operation.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI
Group RFID tag identity authentication method
InactiveCN105656632AReduce operational overheadSimple processMemory record carrier reading problemsUser identity/authority verificationInternet privacyEngineering
The invention discloses a group RFID tag identity authentication method, capable of meeting the actual application requirement of an RFID system. The method provided by the invention is low in requirement on hardware of a tag side, meets the requirement of an ultra lightweight protocol, can achieve the identity authentication process of a group RFID tag, and is applicable to solving the group RFID tag identity authentication problem of the RFID system with low cost.
Owner:BLUEDON INFORMATION SECURITY TECH CO LTD
Multi-strategy-combined OFDM (Orthogonal Frequency Division Multiplexing) frame synchronization method
InactiveCN102497349AOvercoming the disadvantages of frequency offset effectsOvercoming a single structureMulti-frequency code systemsCarrier frequency offsetPeak value
The invention discloses a multi-strategy-combined OFDM (Orthogonal Frequency Division Multiplexing) frame synchronization method, which can be used for effectively resisting wrong synchronization caused by interferences of noise, carrier frequency offsets, same-frequency signals and the like and meets the requirement of frame synchronization of an OFDM system. The method comprises the following steps of: (1) performing symbol cross-correlation operation on a received signal sequence and a local training sequence, performing time delay auto-correlation operation on the received signal sequence, and performing energy operation on a time delay received signal sequence; (2) judging and detecting a cross-correlation operation result and a preset cross-correlation judgment threshold T1, judging and detecting an auto-correlation operation result and a preset auto-correlation judgment threshold T2, and judging and detecting the auto-correlation operation result and a self-adaptive judgment threshold T3; (3) when frame arrival is detected, searching for a peak value of the auto-correlation operation result to obtain a timing position; and (4) adjusting the position of the received signal sequence according to the timing position to obtain a frame synchronization output signal.
Owner:NAT UNIV OF DEFENSE TECH
Distance measuring device
InactiveCN103226014ALow costReduce operational overheadOptical rangefindersPhotogrammetry/videogrammetryCamera imageImaging processing
Owner:HITACHI LTD
Video de-noising processing method and device
ActiveCN106303157AReduce noise levelReduce power consumptionTelevision system detailsColor television detailsImage denoisingPixel value difference
The embodiment of the present invention discloses a video de-noising processing method. The method comprises: obtaining the current frame image of the video; when there is an object frame image, performing pixel value difference calculation of the pixel point of the current frame image and the pixel point of the corresponding position in the object frame image, and obtaining the absolute value of the pixel value difference, wherein the object frame image is the frame image outputted after the last one image of the current frame image is subjected to de-noising processing; determining whether the absolute value is larger than a presetting threshold value or not; if it is determined that the absolute value is larger than a presetting threshold value, updating the pixel point of the corresponding position in the objet frame image to the pixel point in the current frame image; and when the current frame image completes the difference calculation of the presetting number of pixel points, outputting the updated object frame image. The present invention further discloses a video de-noising processing device. According to the invention, the technical problem is solved that the video de-noising algorithm cannot satisfy the requirements of low real-time video flow calculation amount and having no delay of a mobile terminal in the prior art.
Owner:GUANGZHOU BAIGUOYUAN NETWORK TECH
Method and system for evaluating fingerprint positioning error
InactiveCN102480784AHigh speedHigh precisionTransmission monitoringWireless communicationPattern recognitionUsability
The invention discloses a method and system for evaluating a fingerprint positioning error. A fingerprint positioning system is provided with positioning error pre-estimating values corresponding to each fingerprint clustering; and the fingerprint clustering comprises a plurality of fingerprint sampling points similar to base station intensity. The method comprises the steps: the fingerprint positioning system receives user measured data reported by user equipment, and determines positioning results of the user equipment according to the user measured data and information of the fingerprint sampling points stored in a fingerprint database; and the fingerprint positioning system inquires the fingerprint clustering corresponding to the positioning results, and uses the positioning error pre-estimating values corresponding to the inquired fingerprint clustering as the fingerprint positioning error of the user equipment. Through the method and the system for evaluating the fingerprint positioning error, the estimating speed and precision of the fingerprint positioning error are improved; and the commonality, real-time performance and usability of the method for evaluating the fingerprint positioning error are enhanced.
Owner:CHINA MOBILE COMM GRP CO LTD
Portrait analysis method and device based on big data, computer device and storage medium
ActiveCN110363387AGuaranteed accuracyImprove accuracyCharacter and pattern recognitionResourcesCluster algorithmDimensionality reduction
The invention discloses a portrait analysis method and device based on big data, a computer device and a storage medium. The method comprises: acquiring a portrait analysis request, screening out to-be-analyzed portrait data meeting a target screening condition based on the portrait analysis request, wherein the to-be-analyzed portrait data comprising to-be-analyzed portrait factors and to-be-analyzed factor values corresponding to the to-be-analyzed portrait factors; standardizing the to-be-analyzed factor value to obtain a standardized factor value; performing weight analysis on the portraitfactor to be analyzed and the corresponding standardized factor value by adopting a CRITIC method to obtain a weight value; screening the portrait factors to be analyzed according to the corresponding weight values, and determining the portrait factors to be selected; performing dimensionality reduction on the portrait factor to be selected by adopting a PCA method to determine the portrait factor as a target portrait factor; and clustering the target portrait factor and the corresponding standardized factor value by adopting a Kmeans clustering algorithm to obtain a target object. By adopting the method for portrait analysis, the clustering efficiency can be improved.
Owner:PING AN TECH (SHENZHEN) CO LTD
Method and system for operating bank business data memory cache
ActiveCN104850509AProcessing speedSolve the interactive response speedMemory adressing/allocation/relocationSpecial data processing applicationsAccess methodCache server
A method and a system for operating bank business data memory cache are provided. The system comprises a bank business application system, a memory cache cluster and a bank business database. The memory cache cluster comprises a plurality of memory cache servers; the bank business database is used for outputting bank business information data; the bank business application system is connected with the memory cache cluster and is used for receiving a user operation request and transmitting an access request according to the user operation request; the memory cache cluster is respectively connected with the bank business database and the bank business application system and is used for converting the bank business information data as an unstructured memory data structure and then storing in the memory cache servers, and distributing address information corresponding to the memory cache servers to the bank business application system, and inquiring the bank business information data in a local application memory, and outputting a feedback result to the bank business application system. Thereby, the method and the system of the invention provide an integrated, concise and standardized data access method and improve entire interactive response speed of a bank application system under the condition of super-large scale concurrent access.
Owner:BANK OF COMMUNICATIONS
Method and device for monitoring live broadcast content in real time
ActiveCN107197331AImprove accuracyImprove real-time performanceSelective content distributionStream dataBroadcast data
The invention provides a method for monitoring live broadcast content in real time. The method is characterized by comprising the steps of: receiving and analyzing live broadcast streaming data and viewer streaming data in real time, so as to obtain live broadcast data and viewer data; extracting feature data from the live broadcast data and the viewer data; calculating a score value corresponding to each piece of feature data separately; and acquiring an arbitrary score value by means of a first classifier to be compared with a first preset threshold value, judging a safety level of the live broadcast content, and outputting a judgment result. Therefore, by adopting the method for monitoring the live broadcast content in real time provided by the invention, the live broadcast content can be detected through combining features such as video, audio and user behaviors in real time, and the real-time performance of detection can be improved; moreover, the final detection result is determined in a manner of cascading a plurality of classifiers during detection, thus the computation overhead can be reduced, and the precision of the detection result can be improved.
Owner:BEIJING QIYI CENTURY SCI & TECH CO LTD
Data segmenting method and system of distributed graph calculating system
ActiveCN104281664AReduce operational overheadReduce communication overheadWeb data indexingSpecial data processing applicationsSimilarity measureData mining
The invention provides a data segmenting method and system of a distributed graph calculating system. The data segmenting method includes determining a similarity measurement value between each data node and an own first adjacent node in to-be-processed data; acquiring appearing times of a label of each first adjacent node, and determining whether at least two labels identical in appearing times exist or not; if yes, determining second adjacent nodes corresponding to the labels, and determining a label of each data node according to a similarity measurement value between each data node and the corresponding second adjacent node; dividing the data nodes with a same label into a same community, and storing the data nodes belonging to the same community into a same processing host. Community dividing of the data nodes is realized by taking similarity features among the data nodes into full consideration and on the basis of the labels, and operation expenditure is saved; the data nodes close in relationship are distributed into the same processing host, so that expenditure in communication among different processing hosts is reduced.
Owner:BEIHANG UNIV
EKF-SLAM (Extended Kalman Filter-Simultaneous Localization And Mapping) algorithm based on straight line feature map
ActiveCN106444757AReduce complexityReduce operational overheadPosition/course control in two dimensionsSimultaneous localization and mappingPattern recognition
The invention discloses an EKF-SLAM (Extended Kalman Filter-Simultaneous Localization And Mapping) algorithm based on a straight line feature map, which is characterized in that straight line features in an environment are extracted by using laser radar, and a feature map is established according to the straight line features. The EKF-SLAM algorithm taking a straight line as the feature map is creatively designed. In an experimental environment with obvious straight line features, straight lines features of the environment are extracted very easily. The complexity of the algorithm is low, the operation overhead of a processor is reduced, the real-time performance of the system is improved, and the environment processing means of the SLAM algorithm is enriched.
Owner:成都普诺思博科技有限公司
Parallax image generation method and system based on binocular stereo vision matching
ActiveCN110009691AEliminate post-processing stepsSubpixel enhancementImage enhancementImage analysisParallaxStereo matching
The invention provides a parallax image generation method and system based on binocular stereo vision matching. The parallax image generation method comprises the steps of obtaining a pair of speckleimages, wherein the pair of speckle images are images of speckles captured by an object through a pair of binocularly calibrated cameras under the irradiation of a set light beam; inputting the pair of speckle images into a preset deep learning neural network to generate corresponding parallax images, wherein the deep learning neural network is obtained by training a plurality of pairs of speckleimages. According to the method and the system, a pair of speckle images is used as input, a parallax image is directly output through binocular vision stereo matching network (deep learning neural network) processing, end-to-end calculation of the parallax image and an end-to-end network design framework are realized, post-processing steps of stereo matching, such as sub-pixel enhancement, filtering and noise reduction, refinement and the like, are eliminated, and the operation overhead is greatly reduced.
Owner:BEIJING TSINGMICRO INTELLIGENT TECH CO LTD
Vehicle positioning method and device, and terminal device
InactiveCN109118794AReduce overheadReduce operational overheadArrangements for variable traffic instructionsPosition fixationExact locationTerminal equipment
The invention relates to a vehicle positioning method and device, and a terminal device. The method includes the following steps: obtaining positioning information sent by a peripheral device after apositioning instruction is received; selecting the peripheral device that meets a preset condition as a positioning reference according to the positioning information; and obtaining the positioning information of a location of a vehicle according to a wireless signal relationship between the vehicle and the peripheral device as the positioning reference. With the help of a plurality of fixed equipment having a V2X capacity (referring to Vehicle-to-Everything, information exchange between a vehicle and the outside) deployed in a parking stall of an indoor parking lot or near a lane in a vehiclenetwork, information interaction is directly performed on the terminal device having the V2X capacity through V2V, and indoor accurate location information of the vehicle is obtained without deploying a positioning network; and compared with traditional indoor positioning methods, network bandwidth overhead and computation overhead are reduced, and the complexity and cost of the positioning network are reduced.
Owner:ZTE CORP
power frequency sinusoidal AC electrical signal zero-crossing time detection system and method thereof
InactiveCN106950420AImprove frequency estimation accuracyReduce computational overheadMeasurement using digital techniquesEngineeringAlternating current
The invention discloses a power frequency sinusoidal AC electrical signal zero-crossing time detection system and method thereof, relating to the time detection technology in the electrical signal measurement field. The system is characterized in that a power frequency sinusoidal AC signal source (100), an AD sampling circuit (210), a logic-to-logic circuit (221), and a pulse drive circuit (240) are successively connected; and a pulse generating circuit (230) and acontroller (222) are connected to a logic and calculation circuit (221). The method includes (1) initialization, (2) frequency parameter estimation; (3) phase parameter estimation; and (4) zero-crossing time reckoning and output. The power frequency sinusoidal AC electrical signal zero-crossing time detection system and method can effectively detect the zero-crossing time of the power frequency AC analog electrical signal; and controls the error within 1micron second, can be used for the minimal phase error measurement between the analog and digital signals, and facilitates the value traceability of phase accuracy.
Owner:STATE GRID CORP OF CHINA +1
Dynamic correction algorithm of GNSS receiver
InactiveCN103809192AImprove reliabilityHigh positioning accuracySatellite radio beaconingCorrection algorithmSignal-to-noise ratio (imaging)
The invention discloses a dynamic correction algorithm of a GNSS receiver. The dynamic correction algorithm uses differential coherence technology and does not need to estimate navigation message flip so that the computation cost is lowered greatly. The dynamic correction algorithm includes that carrying out dynamic correction before performing coherent addition, to be more specific, designing a DBZP differential coherence acquisition algorithm output matrix, extracting items related to range walk and range curvature through DFT transformation, designing a Keystone transformation algorithm to remove items related to range walk, and constructing phase compensation functions according to related information of related functions in a frequency domain to compensate the range curvature. The dynamic correction algorithm further weakens the influences of Doppler frequency and the change rate thereof, and accordingly the energy of the signal is more concentrated after performing the coherence addition; and moreover, the dynamic correction does not use an intermediate estimate, so that the dynamic correction algorithm is applicable to the environment with low signal to noise ratio, and the receiver can work normally under the application environment with low signal to noise ratio and high dynamic nature.
Owner:ZHEJIANG SCI-TECH UNIV
Method and device for detecting spot defect of face skin based on deep learning
InactiveCN108921825AReduce operational overheadImprove accuracyImage enhancementImage analysisTraining data setsConvolution
The invention provides a method and a device for detecting a spot defect of a face skin based on deep learning. The method comprises the steps of acquiring a training data set; constructing a convolutional neural network, and training the convolutional neural network by use of the training data set to obtain a detection model, wherein the convolutional neural network has the following characteristics: multi-layer convolutional characteristic extraction is performed on a sample to obtain different hierarchies of characteristic graphs, then, sampling is performed by use of sampling frames with multiple sizes and shapes to obtain sampling result corresponding to different hierarchies, then all of the sampling results are classified by use of a softmax loss function and a position is predictedby use of an L1 loss function, a loss value obtained by calculation is returned to a front end of the convolutional neural network, and a convolutional neural network parameter is adjusted b y use ofa gradient descent method; and segmenting a to-be-detected image into test image blocks, inputting all test image blocks into the detection model in a traversal manner to obtain corresponding image block detection results, and then splicing all of the image block test results into a complete image detection result.
Owner:北京羽医甘蓝信息技术有限公司
Network television content safety monitoring and managing method
InactiveCN1791215ARealize regulationEasy to supervisePulse modulation television signal transmissionData integrityDigital signature
The invention relates to a safety supervision method for IPTV content in IP network environment by embedding a content supervision label bund with content in IPTV content flow. Wherein, binding the IPTV content and label with a address sample method and content hash method, signing with label with digital signature method to embed into the IPTV content flow for transmission; on receive end, calculating again and comparing the hash value to determine the content unjuggled, and using digital signature to guarantee the data integrality and truth of label.
Owner:TSINGHUA UNIV
Method and system for quickly accessing information data of clients of banks
InactiveCN104866531AReduce access pressureEffectively spread the pressure of concurrent accessFinanceRelational databasesOutput feedbackOperating system
The invention provides a method and a system for quickly accessing information data of clients of banks. The system includes a bank terminal, a bank digital channel application system and a memory caching system, wherein the bank terminal is in communication connection with the bank digital channel application system, and is used for outputting an access request according to a user operational order; the bank digital channel application system is in communication connection with the memory caching system, and is used for receiving the access request, sending the access request to the memory caching system, and receiving and outputting a feedback result to the bank terminal; the memory caching system includes a plurality of servers, the servers are in communicated connection with a client information data synchronization layer, and are used for receiving the access request sent by the bank digital channel application system, inquiring the bank client information data saved in the memory of the local application, and outputting the feedback result to the bank digital channel application system according to the bank client information data.
Owner:BANK OF COMMUNICATIONS
Method for distinguishing traffic jam of toll plaza of highway based on video detection technology
ActiveCN102436739ASolving the problem of identifying traffic jamsReduce traffic safety hazardsDetection of traffic movementCharacter and pattern recognitionInformation supportDecision taking
The invention relates to the technical field of the detection of the traffic state of a road and particularly discloses a method for distinguishing the traffic jam of a toll plaza of a highway based on a video detection technology, which comprises the following steps: (1) shooting the video of the road of a toll plaza; (2) extracting the picture of the road of the toll plaza from the video; (3) establishing and updating a background model of the picture; (4) extracting a foreground image from the picture; and (5) obtaining the energy value and the absolute value of the variable quantity of the energy value of the foreground image and judging whether the road of the toll plaza is jammed or not. According to the method for distinguishing the traffic jam of the toll plaza of the highway based on the video detection technology, only the parameter of the energy value of the road needs to be obtained, and a jam distinguishing model is constructed, so that the judgment to the jam state of the toll plaza of the highway is finished. The algorithm is simple, the operation expense is little, the real-time property is strong, the problem of distinguishing the traffic jam of the toll plaza of the highway can be accurately and effectively solved, and a jam caution is also output at the time of jam, so that powerful information support is provided for a manager to master a site condition in time and make a management decision so as to reduce the potential safety hazard of pass in traffic.
Owner:SUZHOU YUNSHOU SOFTWARE TECH CO LTD
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