Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
58results about How to "Avoid time overhead" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Method and system for storing mass data of Internet of Things (IoT)
ActiveCN103023970AAccurate understandingEasy to manageTransmissionSpecial data processing applicationsThe InternetData store
The invention relates to a method and a system for storing mass data of the Internet of Things (IoT). The system comprises a plurality of data receiving nodes, a master node server and a database cluster. The method comprises the following steps of: (1) carrying out preprocessing on IoT data, and putting the preprocessed data in the database cluster consisting of a master node, slave nodes and the data receiving nodes; (2) creating sample records, which take sample elements as storage units, on the master node according to the static and dynamic information of the data in the database cluster; (3) after the sample records are encapsulated, sending the encapsulated sample records to all the slave nodes by the master node so as to be subjected to fragmentation processing and / or separated storage; and (4) after the slave nodes complete storage, uploading results to the master node, and updating the data in the database cluster by the master node, thereby completing storage. According to the method and the system, the cluster is extended by fully utilizing the existing storage technologies so as to store the mass data, the IoT data are divided into lightweight data and multimedia data, and particularly, a fragmentation strategy is adopted aiming at a large-scale amount of data, so that the time expenditure caused by the extension of a storage space is avoided.
Owner:COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
Cluster fault-tolerance system, apparatus and method
InactiveCN101369241AGuaranteed to recover correctlyQuick checkError detection/correctionExtensibilityFault tolerance
The invention discloses a cluster fault tolerance system, a device and a method. The system includes: a remote checkpoint server which is used to respond the remote checkpoint request from a faulty node and execute the checkpoint operation; a node faulty checking module which is used to monitor the operating system of a local node and the running state of an assigned process and to trigger a remote checkpoint; and a communication system checkpoint module which is used to realize the checkpoint of the communication device and support the recovery function of communication breakpoint. The invention provides localized fast fault restoration for the parallel processing cluster, has a lower overhead and good expansibility, and makes ideal availability for the cluster system with ten billions and hundred billions calculation scale.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI
Target retrieval method based on group of randomized visual vocabularies and context semantic information
InactiveCN102693311AAddressing operational complexityReduce the semantic gapCharacter and pattern recognitionSpecial data processing applicationsImage databaseSimilarity measure
The invention relates to a target retrieval method based on a group of randomized visual vocabularies and context semantic information. The target retrieval method includes the following steps of clustering local features of a training image library by an exact Euclidean locality sensitive hash function to obtain a group of dynamically scalable randomized visual vocabularies; selecting an inquired image, bordering an target area with a rectangular frame, extracting SIFT (scale invariant feature transform) features of the inquired image and an image database, and subjecting the SIFT features to S<2>LSH (exact Euclidean locality sensitive hashing) mapping to realize the matching between feature points and the visual vocabularies; utilizing the inquired target area and definition of peripheral vision units to calculate a retrieval score of each visual vocabulary in the inquired image and construct an target model with target context semantic information on the basis of a linguistic model; storing a feature vector of the image library to be an index document, and measuring similarity of a linguistic model of the target and a linguistic model of any image in the image library by introducing a K-L divergence to the index document and obtaining a retrieval result.
Owner:THE PLA INFORMATION ENG UNIV
Method for streaming multimedia content
InactiveUS20060075453A1Reduce delaysLess buffer delayAnalogue secracy/subscription systemsMultiple digital computer combinationsNetwork connectionClient-side
Streaming multimedia content from a content server to client, user multimedia devices (UMDs) connected to the content server through a network includes the steps of monitoring storage states, of UMDs connected to the network, for preset multimedia content, and automatically transmitting a starting block of the content to any UMD not yet storing the block. Tasks preparatory to streaming are advantageously off-loaded to the client side and distributed among UMDs, to realize reduced bandwidth and delay and to conserve on storage capacity of a UMD.
Owner:SAMSUNG ELECTRONICS CO LTD
System and method for improving direct memory access (DMA) efficiency of multi-data buffer
ActiveCN102541779AImprove DMA efficiencyIncrease profitElectric digital data processingDirect memory accessRelevant information
The invention provides a system and a method for improving direct memory access (DMA) efficiency of a multi-data buffer. The method comprises (1) when an application program fills data into the data buffer, relevant information of the buffer is transmitted to a network card through a host machine input / output (IO) bus and is stored in an information management module of the data buffer; (2) when detecting that data in the data buffer need to be transmitted, the information management module of the data buffer extracts addresses and lengths of the data waiting for being transmitted from the relevant information of the buffer and transmits the addresses and the lengths of the data to a DMA request queue; (3) DMA request queue organizes requests of data blocks into one or more DMA requests meeting requirements of the host machine IO bus and transmits the DMA requests to a host machine; and (4) a DMA controller of the host machine responds received DMA requests and transmits requested data to the network card through the host machine IO bus. The system and the method for improving the DMA efficiency of the multi-data buffer are based on a multi-queue DMA engine in a non-descriptor mechanism and improve utilization rate and message transmission speed of the host machine IO bus.
Owner:DAWNING INFORMATION IND BEIJING +1
Wide and narrow orthogonal pulse compensation method for pulse radar
InactiveCN102998658ASave time resourcesAvoid time overheadWave based measurement systemsQuadrature modulationMatched filter
The invention provides a wide and narrow orthogonal pulse compensation method for pulse radar. A pair of a wide pulse and a narrow pulse which are subjected to orthogonal modulation is emitted for each pulse repeated period, and then an accepting state is switched to; the wide pulse is in the front and the narrow pulse is at the rear in the pair of the wide pulse and the narrow pulse; and in the accepting state, an echo signal of the wide pulse and an echo signal of the narrow pulse, which are overlapped in time, are separated, by means of matching filers corresponding to the wide pulse and the narrow pulse respectively. According to the wide and narrow orthogonal pulse compensation method, after the wide pulse is emitted, the narrow pulse is directly emitted, receiving time of wide pulse echo is not required to be reserved, and the time interval of each pair of the wide pulse and the narrow pulse is zero or extremely short so that precious time resources are saved and not used, and additional time expenses are avoided.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Method and device for actively finding malicious code control end
ActiveCN101924754AEffective active discoveryEffective identificationTransmissionOperational systemIp address
The invention discloses a method for actively finding a malicious code control end, which comprises the following steps of: scanning host information, namely finding a host computer in an on-line state of which the operating system is Windows and which is provided with open ports in an IP address range needing to be scanned and determining at least one open ports of the host computer; and scanning control end information, namely establishing network connection with the open ports of the host computer, simulating a network behavior of a controlled end host computer corresponding to the known type of the malicious code control end, sending data to the host computer, analyzing the received return data, and if the data meets the characteristic of the known type of the malicious code control end, indicating that the type of the malicious code control end exists in the host computer. The method can effectively identify the malicious code control end, is suitable for large-scale scanning of the host computer in the Internet and has great practical significance for guaranteeing information security. Correspondingly, the invention also provides a device for actively finding the malicious code control end.
Owner:NAT COMP NETWORK & INFORMATION SECURITY MANAGEMENT CENT
Method for detecting freeway traffic event by integration supporting vector machine
InactiveCN101271625AEasy to detectAvoid time overheadDetection of traffic movementSupport vector machineTraffic flow
The invention relates to a method of integrated support vector machine for detecting a traffic incident in an express highway, which can improve a detectability of a detecting system greatly, and avoid an overhead time added due to a training parameter optimization of the support vector machine. The method adopts a Boosting or Bagging method to train a plurality of support vector machines; each sample for training the support vector machine comprises a traffic flow, an occupancy, a speed and a traffic state of an upstream check station and a downstream check station in a detecting area; a value 1 or -1 is used for the representation of traffic state to represent respectively an incident occurring or a non incident occurring; each of the support vector machine is used for judging whether the traffic incident occurs; and the judgment results of the support vector machines are synthesized through a majority voting or a weighted voting so as to judge the present traffic state in the detecting area of the express highway according to the synthesized results, thereby detecting the occurrence of the incident.
Owner:SOUTHEAST UNIV
High-speed frame transfer of sub-frame area
InactiveUS20050248676A1High frame readout rateAvoid time overheadTelevision system detailsTelevision system scanning detailsTransfer modeComputer science
In accordance with the invention, a region of interest (ROI) acquired by a frame transfer CCD is read out as quickly as if the imaging area of the CCD were no larger than the ROI. The imaging area of the CCD outside of the ROI is masked, preventing light from contaminating the rest of the imaging area. After a suitable exposure time the image pixels of the ROI are shifted into the storage region of the frame transfer CCD. Once the ROI is under the mask in the storage region, the next exposure may begin, and so too does the image readout. Now the CCD shifts exactly the number of rows in the ROI into the serial register one at a time and digitizes the number of pixels in each row. This process results in a series of valid ROIs separated by a series of spacer regions pipelining down the storage region of the CCD. As an example, using a standard frame transfer mode of operation, a commercially available frame transfer camera (IPentaMAX) can achieve 83 FPS on a 50×50 ROI. In accordance with this invention, a 50×50 ROI can be read out at 877 FPS
Owner:ROPER SCI
Spatial acceleration structure for virtual three-dimensional scene of animated film and creation and update method thereof
InactiveCN101819684AAvoid time overheadReduce maintenance overhead3D-image renderingSpatial accelerationAnimation
Owner:CHANGCHUN UNIV OF SCI & TECH
Data storage method and device and data acquisition method and device
ActiveCN110928483AHigh speedImprove performanceInput/output to record carriersComputer hardwareData acquisition
The invention provides a data storage method. According to the method, a key of a key-value pair is converted into a hash value from an object, converting the value of the key-value pair from the object into instance data, the data structure of the key and the value is improved; an object head of the key and the value, alignment filling and other parts are removed, storage space occupied by the object head and the alignment filling is saved; therefore, the storage overhead of the object in the key value pair is reduced, the function of compressing and storing the key value pair is realized, the key value storage efficiency is improved, the probability of problems such as memory recovery triggered by overlarge memory space is reduced, and the performance of the storage system is improved.
Owner:HUAWEI CLOUD COMPUTING TECH CO LTD
Application program updating method and device, computer equipment and storage medium
PendingCN110162319AAvoid time overheadTargetedVersion controlSoftware deploymentApplication softwareTime cost
The invention discloses an application program updating method and device, computer equipment and a storage medium. The method comprises the following steps of: receiving a module operation request sent by a client; obtaining a module identifier and current version information contained in the request, acquiring the latest version information corresponding to the module identifier; comparing the current version information with the current version information; when the comparison result is inconsistent, determining that the parameters are inconsistent; sending a historical operation information acquisition request to the client, receiving historical operation information sent by the client, and analyzing the historical operation information; obtaining an update decision result, when the updating judgment result is that updating is needed; obtaining an update file corresponding to the module identifier and sending the update file to the client; according to the technical scheme, whetherthe application program is updated or not is intelligently judged according to the analysis of the historical operation records, so that the updating of the application program is targeted, meanwhile, the module needing to be updated currently is adopted for updating, the additional time cost caused by updating the whole application program is avoided, and the updating efficiency is improved.
Owner:ONE CONNECT SMART TECH CO LTD SHENZHEN
Inter-process communication method and device
ActiveCN104657224AReduce disturbanceAvoid time overheadInterprogram communicationPage tableTime overhead
The embodiment of the invention provides an inter-process communication method and device, relates to the technical field of computers, and aims to realize reading of a message in the case that a receiving end does not need to enter or exit a kernel space, avoid the time expenditure for the receiving end to enter or exit the kernel space, save the response time of the message and meanwhile reduce the disturbance of cache of the receiving end. The method specifically comprises the following steps: establishing a communication channel between the transmitting end and the receiving end; entering the kernel space and writing a channel number and a first parameter of the communication channel into the kernel space; acquiring a shared page table of the receiving end according to the channel number of the communication channel; mapping the physical address of a memory page of the message to a continuous idle page table entry of the shared page table of the receiving end to obtain a new virtual address of the message; storing the new virtual address of the message and the first parameter in a message notification region of the receiving end so as to read the message by the receiving end according to the new virtual address. The method and the device are applied to inter-process communication.
Owner:HUAWEI TECH CO LTD
Agricultural machinery repeated operation area judgement method based on space analysis
The invention discloses an agricultural machinery repeated operation area judgement method based on space analysis, and belongs to the technical field of agricultural machinery. The method includes the following steps that A, plot recognition is carried out according to information acquired by the agricultural machinery in the driving process; B, the boundary of a plot is recognized, and the areaof the plot is calculated; C, repeated operation is judged; wherein in the step C, C1, longitude and latitude positions of coordinates of the center point of the plot are encoded through Geohash encoding based on a dichotomy approximation principle, and C2, repeated operation calculation is carried out. By the adoption of a plot encoding mode, the screening range is narrowed, the operand of distance conversion between the longitude and latitude is reduced, and the purpose of rapidly and accurately calculating the repeated operation area is achieved.
Owner:CETC SATELLITE NAVIGATION OPERATION SERVICE
Method for realizing real-time transaction and data exchange of multiple main bus network communication
The invention discloses a method for realizing real-time transaction and data exchange of multiple main bus network communication. According to the invention, the method is a CAN (Controller Area Network) bus formed by adopting a plurality of terminal devices of Internet of things as nodes, a data collection service request is sent to a host computer by switching to Ethernet via CAN. According to the access priority of the CAN bus, data is sent by the nodes in the network to the CAN bus with adopting nondestructive bit-by-bit arbitration type competition. The data collection service adopts a high-efficiency network I / O model-IOCP, and the frame is processed by dividing into a control flow and a data flow respectively in order to increase the rate of data collection and exchange.
Owner:王向东
Rapid Kalman online detection filtering method based on parameter dynamic adjustment
ActiveCN110032711AGood filtering effectStreamlined iterativeComplex mathematical operationsLower limitPattern recognition
The invention discloses a rapid Kalman online detection filtering method based on parameter dynamic adjustment. The method comprises the following steps: placing a to-be-detected object in the same detection environment for pre-sampling to obtain a plurality of groups of noisy data, and calculating a filtering data target value, a filtering data measurement variance and a Kalman gain lower limit threshold value based on the noisy data; calculating an initial estimation value of the filtering data and an initial estimation variance value of the filtering data in the online detection process ofthe detection object; wherein the initial estimation variance is determined according to an interval to which an error between an initial estimation value and a target value belongs; and performing Kalman filtering correction recursion operation based on the initial estimation value and the initial estimation variance value until the filtering data converges to obtain filtering data of online detection of the detection object. According to the method, the problems of high iteration frequency and low convergence speed caused by the fact that an initial estimation value cannot be adjusted in a traditional Kalman filtering method are solved, and the timeliness of filtering detection is improved.
Owner:CENT SOUTH UNIV
Method and system for solving distributable task scheduling model
InactiveCN104461720AReasonable and efficient divisible task scheduling problemImprove efficiencyProgram initiation/switchingResource allocationAlgorithmGenetic algorithm
The invention discloses a method and system for solving a distributable task scheduling model. The hybrid timing constraint distributable task scheduling model is built and solved with a genetic algorithm. According to the method and system, the releasing time of processors is sufficiently considered in the distributable task scheduling model, and the method and system are more reasonable and more effective; the running time of the genetic algorithm for solving the model is much shorter than the time of an exhaustive algorithm, and the optimal solution of the model can be more efficiently and more accurately solved.
Owner:XIDIAN UNIV
Method for rapid cooperation expression of face classification
ActiveCN107066964AImprove robustnessGuaranteed recognition effectCharacter and pattern recognitionTest sampleDimensionality reduction
The present invention discloses a method for rapid cooperation expression of face classification. The method comprises: obtaining a plurality of face images of all the measured personnel, and combining a training sample set and a test sample set; projecting the training sampling set into a PCA subspace, and obtaining the feature face set of the sample set; performing common linear expression of the test samples through adoption of the feature faces and an intra-class variable dictionary; initializing dictionary coefficients through the 12 paradigm iterative computations in a dictionary space, and subsequently performing second introduction of 11 paradigm to complete the accurate optimization of the coefficients; projecting reconstructed test samples PCA coefficients and dimensionality reduction samples to an LDA subspace, and respectively obtaining LDA coefficients of the reconstructed test samples and the training samples; and selecting the category having the minimum reconstruction errors with the test samples as the final candidate category of face test samples. The method for rapid cooperation expression of face classification effectively rejects the information redundancy between the training samples and the test samples, improves the face identification precision, greatly reduces the time expenditure of a traditional expression optimization method and has good universality and the robustness.
Owner:图斐(无锡)智能科技有限公司
Edge environment-oriented video transmission system and transmission method thereof
ActiveCN111770362AAvoid time overheadNo added computational overheadSelective content distributionComputer hardwareVideo transmission
The invention discloses an edge environment-oriented video transmission system and a transmission method thereof. The system mainly comprises a controller, edge equipmentdevice, mobile equipment and avideo server. And tThe controller calculates the a CPU load of anthe edge device and anthe access point edge device of the mobile device through the an edge device CPU load model, and controls the circulation of the video traffic by issuing a flow table entry to the edge device. The edge device is a carrier for bearing a network function, runs a network function instance for checking video traffic, and caches a video block. The mobile device operates the video client, can be used for watching videos, and periodically uploads position and communication radius information to the controller. Thevideo server divides a video into a plurality of video blocks with fixed sizes, and the video blocks are cached on the edge device through a caching strategy of the controller. According to the system disclosed in the invention, while the video flow is checked, the CPU overload phenomenon of the equipment device in the edge environment is relieved, and the time delay requirement of watching the video by the user is met as much as possible.
Owner:NANJING UNIV +2
Super-complementary-code generating method, system and communication system using the super-complementary-code
InactiveCN1625090AReduce mutual interferenceAvoid time overheadCode division multiplexCommunications systemComputer science
This invention discloses a super complementary code producing method, the system and the communication system using the super complementary code. At first produce N complete complementary codes, and every complementary code has N basic codes, and every basic code has N to the power 2 elements, interacting compute the basic codes to get several complementary codes, every super complementary code has several sub-code, and every sub-code has at least one element. The system producing super complementary is mainly composed of orthogonal matrix assembly, the sequence producer, the complete complementary code producer and the super complementary producer. The super complementary code produced by this invention has the characteristics of 'non-connection interference' and 'non-multi-way interference'. In addition, because the length of the sub-code of the super complementary code can be lowered to 1, so it can lower the ratio of the gain value and the number of users to 1 at least, and the super complementary code of this invention can increase the number of supporting communication users.
Owner:ZHEJIANG UNIV +1
Whole network flow measurement method and system in data center network and packet loss detection method
The invention discloses a whole network flow measurement method and system in a data center network and a packet loss detection method. The system comprises a collector used for supporting to capture all flows flowing through a switch, and the collector comprises a data packet analysis module, a buffer module and a counting table module; the data packet analysis module is used for analyzing quintuple information and data packet size information of a received data packet; the buffer module is used for establishing and maintaining a buffer space to buffer the traffic information and maintaining the traffic information in the buffer space; the buffer module updates the traffic information in an incremental operation mode; the counting table module is used for establishing and maintaining a counting table to store the flow information and maintaining the flow information in the counting table; and when the cache space of the cache module is not spare, the traffic information in the cache space is compressed and then is updated or added to the corresponding position of the counting table. The real-time performance, the accuracy and the comprehensiveness of the flow information can be ensured, and diversified network measurement requirements are supported.
Owner:XI AN JIAOTONG UNIV +1
Method for streaming multimedia content
InactiveUS8166154B2Reduce delaysSave bandwidthAnalogue secracy/subscription systemsMultiple digital computer combinationsNetwork connectionClient-side
Streaming multimedia content from a content server to client, user multimedia devices (UMDs) connected to the content server through a network includes the steps of monitoring storage states, of UMDs connected to the network, for preset multimedia content, and automatically transmitting a starting block of the content to any UMD not yet storing the block. Tasks preparatory to streaming are advantageously off-loaded to the client side and distributed among UMDs, to realize reduced bandwidth and delay and to conserve on storage capacity of a UMD.
Owner:SAMSUNG ELECTRONICS CO LTD
Multi-model fusion driven eye movement tracking method and system for mobile equipment
ActiveCN110147163AExtended Eye Tracking MethodsImproved Eye Tracking AccuracyInput/output for user-computer interactionAcquiring/recognising eyesFixation pointFusion Drive
The invention discloses a multi-model fusion driven eye movement tracking method for mobile equipment. The method comprises the following steps: (1) eye movement characteristic analysis based on an appearance model; (2) eye movement data mapping based on a feature model; and (3) eye movement fixation point calculation based on multi-model fusion. The invention further provides a multi-model fusion driven eye movement tracking system for the mobile equipment. The system comprises the following modules which are sequentially connected and feed data: an eye movement feature analysis module basedon an appearance model; an eye movement data mapping module based on the feature model; and an eye movement fixation point calculation module based on multi-model fusion. The eye movement tracking method on the current mobile device is expanded, and the eye movement tracking precision, the calculation speed and the stability of the mobile device in a complex interaction environment are improved.
Owner:ZHEJIANG UNIV OF TECH
Compression storage and calculation method for high-dimensional interpolation
ActiveCN110674133AReduce storage overheadAvoid time overheadSpecial data processing applicationsDatabase indexingGraph operationsCoordinate vector
The invention discloses a compression storage and calculation method for high-dimensional interpolation. The compression storage and calculation method comprises the following steps: recursively constructing a deep storage tree of an interpolation independent variable according to the interpolation independent variable of each dimension of an interpolation table for searching an interpolation interval of each dimension, constructing a dynamic interpolation binary tree according to the interpolation independent variable, converting an interpolation calculation process into graph operation on the tree, and finally obtaining a result. The storage tree structure of the multi-dimensional interpolation table greatly compresses the storage overhead of repeated data; and the establishment of the dynamic interpolation binary tree unifies the interpolation process of a linear interpolation space and a nonlinear interpolation space, simplifies the calculation, and is helpful for chip-level implementation to greatly improve the efficiency of high-dimensional interpolation calculation. A tree type and binary search method is combined, so that the time expenditure of performing linear sequentialsearch on interpolation coordinate vectors in a traditional method is avoided, and the search efficiency is improved from a linear level to an exponential level. Along with the increase of the orderof magnitudes of problem dimensions, the advantages are more obvious.
Owner:BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
Dynamic document monitoring and protecting system based on drive filtering technology
ActiveCN104731684AEasy to configureAdd supportHardware monitoringSpecial data processing applicationsExtensibilityRelevant information
The invention discloses a dynamic document monitoring and protecting system based on a drive filtering technology. The dynamic document monitoring and protecting system based on the drive filtering technology is composed of a driving module and a client; the client is used for supplying a visual operation interface, being responsible for database operations, and meanwhile displaying relevant information to a user; the driving module is a main body for completing monitoring and protecting of the document system, and has functions of rule matching, document request analyzing, document request intercepting and information sending to the client; communication between the driving module and the client is performed by sending information, and as long as the information meets a prescribed form, the information can be received correctly and explained. The dynamic document monitoring and protecting system adopts the drive filtering technology, rule matching is achieved based on matching algorithms of bucket dividing and lexicographic tree, a complete communication format definition of the driving module and the client is achieved, and the system is suitable for multimode extensible real-time environment configuration. According to the dynamic document monitoring and protecting system based on the drive filtering technology, the extensibility is improved, a database function is integrated, and the problems of data storage and efficiency are well solved.
Owner:WUHAN UNIV
System for carrying out video caching, transcoding and transmission through utilization of vehicular APs and working method thereof
ActiveCN108667848ANo added computational overheadAvoid time overheadParticular environment based servicesIn-vehicle communicationTranscodingWorking set
The invention discloses a system for carrying out video caching, transcoding and transmission through utilization of vehicular APs and a working method thereof. The system mainly comprises the vehicular APs, a mobile device, a controller and a video server. The controller collects location, speed and working channel information of the vehicular APs, responds to a query request of the mobile device, calculates expected throughput between the vehicular APs and the mobile device according to a throughput model, and provides a candidate vehicular AP list, the expected throughput and expected communication time for the mobile device. The mobile device selects the suitable vehicular AP for connection according to the candidate vehicular AP list, the expected throughput and the expected communication time. A video client adjusts a video request bit rate according to expected average throughput of the connected vehicular AP. According to the system and the working method, the throughput of themobile device can be improved through full utilization of the vehicular APs, and the video watching experience of a user is improved.
Owner:NANJING UNIV
Method and device for controlling service message transmission
InactiveCN101674242BReduce latencyImprove sending efficiencyData switching networksComputer networkPacket transmission
The invention discloses a service message sending control method and a device. The method comprises the following steps: carrying out service identification on the service message to be sent and determining a simulated queueing to which the service message belongs; determining the service message which can enter the unique real queueing of the weighed fair queueing (WFQ) in each simulated queueingaccording to sending rate corresponding to each simulated queueing in the current dispatching cycle, and adding the determined service message to the real queueing of the WFQ and sending the servicemessage; and determining the sending rates according to the interface bandwidth, the simulated queueing in the selected reference cycle and the priority of the service corresponding each sending rate.The method only adopts a real queueing and improves the sending rate of the message and reduces the system expenditure while adjusting the data sending quantity of each service according to the dynamic change of the network environment.
Owner:RUIJIE NETWORKS CO LTD
Prefabricated body development method, device and equipment and medium
InactiveCN109634595AGuaranteed efficiencyGuaranteed availabilityVisual/graphical programmingExecution paradigmsTime costTime overhead
The invention discloses a prefabricated body development method, device and equipment and a medium. The method comprises the following steps: obtaining each art resource on which a target preform depends; judging the availability state of each art resource according to a corresponding preset standard; when the target art resources in the abnormal state exist, abnormity elimination is conducted onthe target art resources; and when all the art resources are in a normal state, all the art resources are optimized and combined to generate a target prefabricated body. According to the method, the time cost caused by repeatedly executing the processing and verification process of the art resources is relatively avoided, so that the overall efficiency of the prefabricated body in the developmentprocess can be relatively ensured. In addition, the invention further provides a prefabricated body development device and equipment and a medium, and the beneficial effects are the same as those mentioned above.
Owner:广东趣炫网络股份有限公司
Method and system for storing mass data of Internet of Things (IoT)
ActiveCN103023970BAccurate understandingEasy to manageTransmissionSpecial data processing applicationsThe InternetDatabase clustering
The invention relates to a method and a system for storing mass data of the Internet of Things (IoT). The system comprises a plurality of data receiving nodes, a master node server and a database cluster. The method comprises the following steps of: (1) carrying out preprocessing on IoT data, and putting the preprocessed data in the database cluster consisting of a master node, slave nodes and the data receiving nodes; (2) creating sample records, which take sample elements as storage units, on the master node according to the static and dynamic information of the data in the database cluster; (3) after the sample records are encapsulated, sending the encapsulated sample records to all the slave nodes by the master node so as to be subjected to fragmentation processing and / or separated storage; and (4) after the slave nodes complete storage, uploading results to the master node, and updating the data in the database cluster by the master node, thereby completing storage. According to the method and the system, the cluster is extended by fully utilizing the existing storage technologies so as to store the mass data, the IoT data are divided into lightweight data and multimedia data, and particularly, a fragmentation strategy is adopted aiming at a large-scale amount of data, so that the time expenditure caused by the extension of a storage space is avoided.
Owner:COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
Optimization method for formalized modeling
InactiveCN105095065AImprove performanceAutomatic fastSoftware testing/debuggingRedundant codeControl system
The present invention relates to an optimization method for formalized modeling. In a critical and real-time flight control system that has strict requirements on time, single use of a formalized modeling design method causes time cost brought by partial intermediate redundant codes generated in a modeling process and requirements of a hard real-time task system cannot be met. According to the scheme adopted by the present invention, by introducing a formalized modeling tool and a bridging technological method of a general library, an architecture design of a system is completed by means of a formalized modeling method at an early period and calculation analysis is performed on performances, such as time cost, of each module in the system; and for the module that has relatively large time cost or not good performance, an existing general library is bridged by using a self-adaptive adaptation layer, so that cooperative work of the formalized modeling method and the general library is implemented, and performance optimization is performed on formalized modeling.
Owner:FLIGHT AUTOMATIC CONTROL RES INST
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com