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48results about How to "Break through performance bottlenecks" patented technology
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Parallelization method of distributed hydrological simulation under cluster environment
ActiveCN103092572ABreak through performance bottlenecksImprove efficiencyConcurrent instruction executionSpecial data processing applicationsParallel algorithmStatic dispatch
Disclosed is a parallelization method of distributed hydrological simulation under cluster environment. Confluence process calculation which is a limiting factor in parallel computation of the distributed hydrological simulation and slope process calculation with good parallelism are distinctively treated, a parallel algorithm under the cluster environment is researched and developed, so that calculation efficiency is improved. The technical scheme includes that the method comprises the steps: carrying out substream partition and classification; serving the substream as a template, subdividing input data and storing the data into a data bank; serving the area of the substream as a measurement index of calculated amount, at the same time, considering a topological relation among substreams and carrying out partition of calculation tasks; serving the substream as a unit, carrying out parallel computation under the cluster environment, wherein the slope process calculation adopts a static scheduling, and the watercourse process calculation adopts a dynamic scheduling; and writing a result into the data bank after the calculation is finished. According to the parallelization method of the distributed hydrological simulation under the cluster environment, performance bottlenecks of an existing parallelization method of the distributed hydrological simulation under the cluster environment are broken through, parallel performance is remarkably improved, and application prospect in aspects of large-watershed high-resolution distributed hydrological simulation is wide.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Self-enhanced polylactic acid fiber and preparation method thereof
ActiveCN102634866AHigh normal temperature mechanical strengthLow boiling water shrinkageArtificial filament heat treatmentMelt spinning methodsFiberSpin speed
The invention relates to a self-enhanced polylactic acid fiber and a preparation method thereof. The self-enhanced polylactic acid fiber provided by the invention is a uniform mixture of a vertical compound crystal polylactic acid micro-fiber and a polylactic acid substrate. In 100 weight parts of self-enhanced polylactic acid fiber, 1-30 parts of vertical compound crystal polylactic acid micro-fiber and 70-99 parts of polylactic acid substrate are contained. The preparation method of the fiber comprises the following steps: firstly, respectively carrying out vacuum drying on PLLA (poly L lactic acid) and PDLA (poly D lactic acid); physically mixing PLLA with PDLA after being dried; fusing the mixture; collecting primary fibers under the conditions that a spinning temperature is 225-245 DEG C and a spinning speed is 500-2500 meters per minute; and thermally drafting and thermally shaping the primary fibers. Compared with the common polylactic acid fiber, the self-enhanced polylactic acid fiber disclosed by the invention has the advantages of higher constant temperature mechanical strength, higher high temperature mechanical strength and lower boiling water shrinkage, so that the use demand is met and the application field is expanded.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Chromium-free composite passivator and preparation method thereof
InactiveCN102168265AReduce pollutionBreak through performance bottlenecksMetallic material coating processesChromium freeEpoxy
The invention relates to the technical field of metal passivators, and particularly relates to a chromium-free composite passivator and a preparation method thereof. The chromium-free composite passivator provided by the invention is prepared from the following components in percentage by mass: 3.0-10% of gamma-methylacryloyloxytrimethoxy silane, 0.1-3.0% of sodium molybdate, 0.1-5.0% of cerium chloride, 0.5-4.0% of phosphoric acid, 0.5-4.0% of acetic acid, 15-20% of water-soluble epoxy resin, 5-15% of water-soluble acrylic resin, 10-30% of water and 20-40% of ethanol. The chromium-free composite passivator is suitable for treating steel, zinc and zinc alloy, or aluminum and aluminum alloy. The chromium-free composite passivator contains the water-soluble high-molecular resins and inorganic corrosion inhibitor, and is mixed with ethanol to form a colorless, innoxious, environment-friendly, transparent and clear solution. At room temperature, the chromium-free composite passivator is applied on the surface of steel, hot-galvanized zinc and zinc alloy, or aluminum and aluminum alloy to generate chemical crosslinking reaction, and is cured to form a film.
Owner:NORTHEASTERN UNIV
Application service system for monitoring power charging-exchanging station and interprocess communication method
InactiveCN102647319ABreak through performance bottlenecksOvercoming Single Points of FailureBus networksService systemBus interface
The invention relates to an application service system for monitoring a power charging-exchanging station and an interprocess communication method. The system comprises a service request end, a service supply end and an application service bus, wherein the service request end is used for putting forward a service request from the application service bus; the service supply end is used for supplying service corresponding to the service request sent from the application service bus; the application service bus is used for managing the application service, interaction and processing of information, and monitoring the operation conditions of each node and conducting corresponding control; and the service request end and the service supply end are respectively in communication connection with the application service bus through a service bus adaptor and a bus standard interface. The application service system realizes plug and play to various components conforming to soft bus interface standards and is easy for integration and customization of a large-scale software system; the standardization of component interfaces gives rise to hardware or industrialization of production, therefore the production efficiency is increased; and redundancy deployment of double application service buses is adopted, the performance bottleneck of single bus load is broken through, single-point failures are overcome and the applicability of the system is enhanced.
Owner:STATE GRID SHANDONG ELECTRIC POWER +2
Software defined network (SDN) controlling system, method and device
The embodiment of the invention discloses a software defined network (SDN) controlling system, method and device. The SDN controlling system divides a network into multiple sub-domains and comprises a super-controller and domain controllers, wherein the super-controller is in charge of inter-domain control, each domain controller is in charge of intra-domain control, and the super-controller and the domain controllers perform communication according to the OpenExchange protocol; when a first terminal device and a second terminal in communications are not located in a same domain, the domain controllers send communication requests to the super-controller; the super-controller performs calculation to obtain an optimal cross-domain path of the first terminal device and the second terminal device and sends installation information of the optimal cross-domain path to the domain controllers of all paths in the optimal cross-domain path. By adopting a classification domain SDN controlling system provided by the embodiment of the invention, the SDN control network size can be expanded, the performance bottle-neck of a controller is broken through, and meanwhile, compared with an SDN distributive cluster technology, more division purviews are own; the communication traffic of information in control layer and the synchronization time delay of the information are reduced.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Graphical data quality evaluation device and method based on big data technology
InactiveCN106874483AReduce processing complexityImprove access throughputSpecial data processing applicationsDistributed memoryData acquisition
Disclosed are a graphical data quality evaluation device and method based on a big data technology. The device comprises a data acquisition device, an equipment monitoring device, a distributed memory, a spark memory calculation engine, a calculation unit, a data quality checking unit and a data preprocessing unit, wherein the data acquisition device is connected with the equipment monitoring device connected with the distributed memory, the distributed memory is connected with the data preprocessing unit, the data preprocessing unit comprises the spark memory calculation engine, the calculation unit and the data quality checking unit, mass heterogeneous data can be processed rapidly, efficiently and in time, and at the same time, the safe, stable and efficient operation of the device is ensured.
Owner:SHANDONG LUNENG SOFTWARE TECH
Breast tumor classification algorithm based on convolutional neural network VGG16
InactiveCN108021936AImprove classification resultsHigh precisionMedical automated diagnosisCharacter and pattern recognitionData imbalanceNODAL
The invention relates to a breast tumor classification algorithm based on a convolutional neural network VGG16. The algorithm comprises the following steps that: data preprocessing: for a dataset which presents a data imbalance state, carrying out imbalance processing and data enhancement processing; the establishment of the convolutional neural network: 1) network pre-training: utilizing the VGG16 to carry out network training on an ImageNet large natural image dataset, and storing trained weight; 2) network key node selection: utilizing different layers of the VGG16 network to carry out feature extraction on a breast tumor DDSM (Digital Database for Screening Mammography) dataset, applying the same SVM (Support Vector Machine) classifier for classification for extracted features, and selecting a layer with highest classification performance as a node constructed by a new network; and 3) connecting two layers of full connection and one layer of softmax to form a new network behind thenode constructed by the selected network; and carrying out migration learning.
Owner:TIANJIN UNIV
Low-power-consumption 12-bit assembly line successive approximation analog-digital converter
ActiveCN104320141AImprove performanceReduce the impactAnalogue/digital conversionElectric signal transmission systemsAudio power amplifierAssembly line
The invention discloses a low-power-consumption 12-bit assembly line successive approximation analog-digital converter which comprises a 6-bit sublevel successive approximation analog-digital converter, an operational amplifier, a 7-bit sublevel successive approximation analog-digital converter and a digital delay calibration unit. The residual signal output end of the 6-bit sublevel successive approximation analog-digital converter is connected with the input end of the operational amplifier, digital signals of the 6-bit sublevel successive approximation analog-digital converter are output to the high 6-bit input end of the digital delay calibration unit, the output end of the operational amplifier is connected with the input end of the 7-bit sublevel successive approximation analog-digital converter, and the digital signal output end of the 7-bit sublevel successive approximation analog-digital converter is connected with the low 6-bit input end of the digital delay calibration unit. The converter effectively achieves combination of assembly line analog-digital converters and successive approximation comparators, effectively improves comprehensive performance of the analog-digital converters, is low in power consumption compared with like analog-digital converters and has wide application prospects in the deep submicron process.
Owner:SOUTH CHINA UNIV OF TECH
Novel cloud computing network system and method based on SDR
The invention discloses a novel cloud computing network system and method based on SDR. The system comprises a programmable soft base station, a distributed cloud computing platform, a user device, a core network and the Internet, wherein the programmable soft base station includes an USRP and a PC; the USRP is connected with the PC and used for completing signal transmitting-receiving, frequency conversion and analog-to-digital conversion; the PC is used for processing signals received from the USRP, and assigning computing tasks to the distributed cloud computing platform; the USRP is composed of a mother board and a daughter board, the daughter board is used for receiving / transmitting radio frequency signals and converting into intermediate frequency signals, and the mother board is used for intermediate frequency sampling and converting the intermediate frequency signals / baseband signals into the baseband signals / the intermediate frequency signals; the distributed cloud computing platform is composed of the plurality of PC connected with one another, shares computing resources, and is used for receiving the computing tasks from the PC of the programmable soft base station and returning computing results to the PC; the user device receives and transmits the signals through the programmable soft base station; and the programmable soft base station communicates with the Internet by the core network.
Owner:BEIJING UNIV OF POSTS & TELECOMM
A distributed encrypted storage system
InactiveCN109104433AImprove securityBreak through performance bottlenecksTransmissionThe InternetData access
The invention discloses a distributed encrypted storage system, which belongs to the technical field of network storage. The system includes a user terminal, a management terminal and a distributed storage server, all of which are connected through the Internet. A plurality of distributed storage servers are combined to form a storage server cluster; the user terminal provides the user with data access to the storage server cluster. The management terminal provides the administrator with encryption processing for initializing the storage server cluster; each distributed storage server comprises a storage management unit which distributes data files sent to a storage server cluster to different distributed storage servers for storage; a storage unit for storing a data file; the storage unitincludes an encrypted solid state disk having at least one PCIe interface. The technical scheme has the advantages of providing a high-performance distributed storage solution, improving the securityof data storage, and breaking the performance bottleneck of data storage.
Owner:FASII INFORMATION TECH SHANGHAI
Mobile police service application management and control system
ActiveCN104301366ALoad balancingAchieve large data volume processing performanceTransmissionLevel structureOperational system
The invention discloses a mobile police service application management and control system comprising a terminal system and a background support system. The terminal system is an Android operating system. The background support system comprises a WEB interaction server, a database server and a terminal event processing server. The background support system provides an application program for the terminal system, and carries out information interaction with the terminal system through the WEB interaction server and a mobile network. The terminal event processing server carries out real-time processing and feedback according to a collected request of the terminal system. The mobile police service application management and control system supports the functions of application program creating, applying, updating, reviewing, publishing, unshelving and distributing. The mobile police service application management and control system supports a multi-level structure, and has the advantages of balanced load, flexible deployment, high system scalability, and convenient management.
Owner:SHANGHAI CHENRUI INFORMATION TECH
Hot-press sintering device, block thermoelectric materials of micro-nano porous structure and manufacturing method thereof
ActiveCN108963064AEffective control of thickness (volume)Low costThermoelectric device manufacture/treatmentMicro nanoHot press
The present invention provides a hot-press sintering device. The device comprises a top electrode, a bottom electrode, a water-cooling vacuum chamber and a mould group. The mould group comprises a mould main body, an upper pressing head and a lower pressing head, the mould main body is provided with a through hole in a height direction, the sum of the heights of the upper pressing head and the lower pressing head is smaller than the height of the mould main body, when the hot-press sintering device is operated, the mould set is arranged in the water-cooling vacuum chamber, the top electrode and the bottom electrode press the upper pressing head and the lower pressing head into the through hole of the mould main body until the upper pressing head and the lower pressing head to be leveled with the upper end face and the lower end face of the mould main body, and the through hole of the mould main body is internally provided with a sample chamber holding samples. The present invention further relates to a method for preparing thermoelectric materials through adoption of the device mentioned above, and thermoelectric materials of a multi-scale micro-nano porous structure with a chemical formula of Mg3.2-xMnxSb1.5-yBi0.5Tey, wherein 0.0125<=x<=0.1, and 0.01<=y<=0.05.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Super-hydrophilic and biodegradable oil-water separation membrane and preparation method thereof
ActiveCN109316980AImprove resistance to degradationHigh crystallinityMembranesSemi-permeable membranesCrystallinityBiodegradable polymer
The invention discloses a super-hydrophilic and biodegradable oil-water separation membrane and a preparation method thereof. A nanofiber membrane is prepared from polyglycolic acid nanofiber with a surface wrapped by a polylactic acid-glycolic acid copolymer. According to the method, polylactic acid / polyglycolic acid blend fiber is produced at a proper spinning temperature and spinning speed through preferably choosing the molecular weights of the polylactic acid and the polyglycolic acid as well as the content and mixed proportion of optical isomers. In specific conditions such as above preferential raw material ingredients and strong enough elongation flow fields, polyglycolic acid nanofiber is in situ formed in the molding process of the polylactic acid / polyglycolic acid blend fiber. The nanofiber is in situ generated in the process of melt spinning at a relatively high speed, not only are the shapes and sizes uniform, but also the degree of orientation and the degree of crystallinity are relatively high, meanwhile, the surface of the nanofiber is coated with the polylactic acid-glycolic acid copolymer, which is in situ formed through ester exchange, and the super-hydrophilic performance and degradation resistance of the oil-water separation membrane are obviously superior to the super-hydrophilic performance and degradation resistance of common polyglycolic acid nanofiber.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Blade, modeling method and manufacturing method thereof and air compressor
ActiveCN113217461AImprove efficiencyBreak through performance bottlenecksPump componentsWind energy generationSuction forceEngineering
The invention discloses a blade, a modeling method and manufacturing method thereof and an air compressor. The modeling method comprises the steps that a flowing channel is sequentially divided into an inlet semi-vaneless area, a channel expansion area and an outlet semi-vaneless area in the gas flowing direction; front edge side end points of a suction surface molded line and a pressure surface molded line of the flowing channel are determined; blade molded lines forming the boundaries of the inlet semi-vaneless area, the channel expansion area and the outlet semi-vaneless area are sequentially determined, and the channel expansion angle of the whole flowing channel is regulated and controlled; on the basis of the determined molded lines, modeling of the primitive-level blade profiles is completed, and then the primitive-level blade profiles are stacked to form the three-dimensional blade. The modeling method has the advantage that the diffusion degree of an expansion channel is controllable, the quality of flowing airflow in the expansion channel of the axial flow air compressor blade is improved helpfully, pneumatic matching between blade rows is improved, and the efficiency of the axial flow air compressor is improved; and the modeling method has good applicability to radial / axial diffuser blades of a centrifugal air compressor and high-low pressure stage rotor / stator blades of a turbine.
Owner:CENT SOUTH UNIV
Laser-weldable modified polypropylene material and preparation method thereof
The invention relates to a laser-weldable modified polypropylene material and a preparation method thereof. The laser-weldable modified polypropylene material is composed of the following components in parts by weight: 50 to 90 parts of polypropylene, 0 to 20 parts of a toughening agent, 10 to 30 parts of a filling agent, 0.05 to 1.0 part of nano particles, 0.1 to 0.5 part of an antioxidant, 0.1 to 0.5 part of a light stabilizer and 0.05 to 1.0 part of light-transmitting black powder. Through the synergistic effect of the light-transmitting black powder and the nano particles, the permeabilityof the polypropylene material to 900-1100 nm near-infrared light is improved, the requirements for rapidness and low energy consumption of laser welding can be met, the performance bottleneck is broken through, and the application field of the laser welding technology to plastic parts on automobiles is greatly widened.
Owner:JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD +1
Air-sea wireless channel estimation method based on deep learning
ActiveCN113422745AReduce model parameter redundancyReduce model computational complexityBaseband system detailsNeural architecturesEnvironmental geologyData science
The invention provides an air-sea wireless channel estimation method based on deep learning, and the method comprises the steps: generating channel transmission function (CTF) data by building an offshore wireless channel simulation platform; collecting an orthogonal frequency division multiplexing pilot frequency receiving signal, and calculating least square estimation of the CTF at a pilot frequency position; preprocessing the least square estimation of the CTF data and the CTF at the pilot frequency position to construct a training data set; constructing an efficient channel estimation convolutional neural network, performing offline training on the efficient channel estimation convolutional neural network according to the training data set, and updating weight parameters of the efficient channel estimation convolutional neural network; and solidifying weight parameters of the efficient channel estimation convolutional neural network, and performing online testing. According to the air-sea wireless channel estimation method provided by the invention, sparse features on a channel delay domain are extracted by using trainable sparse transformation, so that model parameter redundancy can be reduced; meanwhile, according to the method, interpolation calculation of any up-sampling factor is achieved through a sub-pixel convolution layer and a cutting layer, the model calculation complexity can be reduced, and the mean square error performance bottleneck is broken through.
Owner:SUN YAT SEN UNIV
Pressure regulating structure of variable loading type pressure regulator
PendingCN112253762AWith adaptive adjustment functionBreak through performance bottlenecksOperating means/releasing devices for valvesLift valveEngineeringSelf adaptive
The invention relates to a pressure regulating structure of a variable loading type pressure regulator. The pressure regulating structure is arranged in a gas pressure regulator, and a pressure regulator diaphragm is arranged in the gas pressure regulator. The pressure regulating structure comprises a differential pressure elastic air bag arranged on the pressure regulator diaphragm and a pilot valve connected to the differential pressure elastic air bag through an air guide signal pipe, wherein the differential pressure elastic air bag is a circle of completely sealed closed circular ring, and an elastic air bag cavity D is arranged in the differential pressure elastic air bag; and a pilot valve air inlet A is arranged in the pilot valve, the pilot valve comprises a pilot valve body, a piston is arranged in the pilot valve body, and the air guide signal pipe is connected into the pilot valve body and is controlled to be on and off through the position of the piston. The self-operatedvariable loading structure does not need external force, has a self-adaptive adjusting function, is safe, reliable and good in control performance through the loading mode of the differential pressureair bag and the control mode of the differential pressure pilot valve and the air bag, provides the most suitable loading area and is high in regulation precision.
Owner:CHENGDU JIUYU GAS EQUIP
Good-touch glass fiber reinforced polypropylene compound and preparation method thereof
ActiveCN111763383AImprovement of viscosity by precipitationMeet the requirements of standard PV1306Glass fiberPolymer science
The invention relates to a good-touch glass fiber reinforced polypropylene compound and a preparation method thereof. The good-touch glass fiber reinforced polypropylene compound comprises polypropylene, a toughening agent A, a toughening agent B, glass fibers, a maleic anhydride graft, a nucleating agent, an antioxidant and a light stabilizer. According to the invention, by adding the uniquely compounded flexibilizer, the dissociation viscosity of a produced polypropylene material with good touch feeling is obviously improved, the requirements of the public material standard PV1306 can be met, the bottleneck of performance is broken through, and the application field of reinforced polypropylene in plastic parts on automobiles is greatly widened.
Owner:JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
A middleware method for realizing searchable encryption relational database caching
ActiveCN109597829AAchieve integrationSafe and fast lookupDigital data information retrievalDigital data protectionIn-memory databasePlaintext
The invention discloses a middleware method for realizing searchable encryption relational database caching, which specifically comprises the following steps of: 1, establishing mapping between a plaintext database and a ciphertext data connecting middleware to the plaintext database, and integrally converting the middleware and the ciphertext database into the searchable ciphertext database;using a unified searchable encryption algorithm to add, delete, modify and check newly stored data to realize fusion of a new database and an old database; Step 2, establishing a user query cache byutilizing an NOSQL data carrying out SQL analysis and routing on the middleware, cache hit and miss on the middleware, calculating column access frequency, and carrying out cache monitoring; Andstep 3, for each query operation of the user, judging whether the query request hits the cache or not, if so, returning a result from the memory database, otherwise, connecting the ciphertext database, and returning the query result. According to the method, the query speed of the searchable ciphertext database is increased and the concurrency problem is relieved while the security is ensured.
Owner:NANJING UNIV OF POSTS & TELECOMM
Cloud service method for taxation cloud computing network billing IM (Instant Messaging) online customer system
ActiveCN102447734BBreak through performance bottlenecksSolve wasteFinanceTransmissionSoftware systemState management
Owner:日照浪潮云计算有限公司
Real-time detection tracking method for moving object of space-borne satellite image
ActiveCN108876807ABreak through performance bottlenecksRealize real-time monitoringImage enhancementImage analysisSatellite imageImage stabilization
A real-time detection tracking method for a moving object of a space-borne satellite image belongs to the technical field of the satellite image and in particular relates to a detection tracking method for the moving object of the space-borne satellite image. The invention can solve the problems of error tracking caused by a lot of moving noisy points brought by image stabilization, tracking lossrate during multi-target tracking and performance of a detection tracking algorithm. The algorithm breaks through the performance bottleneck, and is capable of realizing real-time monitoring of a space-borne satellite and reducing the labor cost; an abnormal condition can be warned in time through a precise detection tracking result, man power is not needed for monitoring all the time, and the method can be applied to the military field for detection tracking of the moving object such as an aircraft carrier and a warship.
Owner:长春博立电子科技有限公司
Market low-delay interface device based on FPGA (Field Programmable Gate Array)
PendingCN114143119ARealize forwardingLower latencyData switching detailsHigh level techniquesComputer architecturePHY
The invention discloses a market condition low-delay interface device based on an FPGA (Field Programmable Gate Array), which is used for reducing the interface delay and greatly improving the efficiency. According to the technical scheme, an interface device uses an FPGA to achieve a PHY protocol (including a PCS layer, namely a physical coding sub-layer and an MAC layer, namely a medium access control layer) and a TCP protocol (mainly TCP mirror image processing) to receive the stock quotation, then the analyzed stock quotation is forwarded to a client through a UDP protocol, and the FPGA is used to achieve 10-gigabit Ethernet and the TCP protocol to achieve data receiving and forwarding of the stock quotation. Specifically, in the interface device provided by the invention, the original standard Ethernet layering (PCS layer and MAC layer) is improved to be realized by mixing the two layers together as a module instead of layering according to a standard protocol, so that the number of the realized modules is reduced, the time delay caused by each module is reduced, and the data output of the Ethernet interface is accelerated.
Owner:上海金融期货信息技术有限公司
Image processing method and electronic equipment
ActiveCN105991959ASolve resource-intensive technical problemsReduce the number of samplesTelevision system detailsColor television detailsImaging processingElectronic equipment
The invention discloses an image processing method and electronic equipment. The method comprises a step of collecting and obtaining a first image comprising a first facial object through an image collection unit in the electronic equipment, a step of obtaining the first pixel ratio of the first facial object in the first image, a step of determining a first filtering parameter according to the first pixel ratio, a step of carrying out one-dimensional filtering on the first image in the first direction of an image coordinate system, and obtaining a first filtering image, and a step of carrying out one-dimensional filtering on the first filtering image in a second reaction which is orthogonal to the first direction in the image coordinate system, and obtaining a second image.
Owner:LENOVO (BEIJING) LTD
Network message matching method of custom protocol application layer based on K-nearest neighbor
PendingCN114520838AImprove reliabilityGuaranteed reliabilityCharacter and pattern recognitionTransmissionTheoretical computer scienceNear neighbor
The invention provides a network message matching method of a custom protocol application layer based on K-nearest neighbor, and belongs to the field of data transmission. The method comprises the following steps: constructing a protocol type storage structure according to historical network messages, carrying out sequential numbering according to timestamps, obtaining a structure feature value and a value array of each protocol type, obtaining prediction protocols of K neighbors based on a K neighbor model, inputting the prediction protocols and feature values into a linear regression equation, and carrying out linear regression on the prediction protocols of K neighbors according to the linear regression equation; obtaining similar weights of a to-be-matched protocol and K prediction protocols, sorting the similar weights, obtaining a source IP and a destination IP of a to-be-matched message, querying corresponding protocol types, and forming U with the prediction protocols; matching the network message to be matched with the protocol in the U one by one, and when the matching is successful, transmitting data and returning a protocol type; and when the matching fails, the local protocols except the U are polled and matched until the matching is correct. According to the invention, the data transmission efficiency is improved while the transmission reliability and security are ensured.
Owner:BEIJING JIAOTONG UNIV
Fast and lightweight face recognition method and device, machine readable medium and equipment
InactiveCN112580472AShorten the timeBreak through performance bottlenecksSpoof detectionFace detectionFeature extraction
The invention discloses a rapid light-weight face recognition method, and the method comprises a face detection step: carrying out the detection of a to-be-detected video, obtaining a detection target, and obtaining a face image of the detection target; a key point extraction step: performing human face key point extraction on the human face image, and performing human face alignment based on thehuman face key points; a living body verification step: performing living body verification on a corresponding detection target based on the aligned face image; a feature value calculation step: calculating a face feature value of the face image according to the aligned face image; and a face recognition step: performing face recognition on the detection target based on the face feature value, wherein the face detection step, the key point extraction step, the living body detection step, the feature value calculation step and the face recognition step are executed asynchronously, and the living body verification step and the characteristic value calculation step are executed in parallel. According to the method and device, the living body verification step and the feature extraction step are executed in parallel, so that half of time is saved, and quick response is achieved during face recognition.
Owner:GUANGZHOU YUNCONG INFORMATION TECH CO LTD
Modular software multi-process running system
ActiveCN111522623AEasy to integrateFast integrationResource allocationSoftware designSoftware systemSoftware architecture
The invention discloses a modular software multi-process operation system, which comprises a service-oriented component framework, a container management framework and a software architecture configuration module, and is characterized in that the service-oriented component framework is used for providing component development standards and component publishing and subscribing strategies for software suppliers; the software architecture configuration module provides a tool for a user to configure an operation scheme and distributed communication in a software system, and generates an operationscheme configuration file and a distributed communication configuration file required by the container management framework; and the container management framework is used for subscribing components from the service-oriented component framework according to the operation scheme configuration file to form a container, and establishing communication inside the container and between the containers according to the distributed communication configuration file. A component development, operation, integration and test unified environment and standard are provided for unmanned aerial vehicle ground station software development, and the problems of unified deployment, quick integration, function expansion and the like of different application software of different manufacturers are solved.
Owner:CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
Self-enhanced polylactic acid fiber and preparation method thereof
ActiveCN102634866BHigh normal temperature mechanical strengthLow boiling water shrinkageArtificial filament heat treatmentMelt spinning methodsFiberUltimate tensile strength
The invention relates to a self-enhanced polylactic acid fiber and a preparation method thereof. The self-enhanced polylactic acid fiber provided by the invention is a uniform mixture of a vertical compound crystal polylactic acid micro-fiber and a polylactic acid substrate. In 100 weight parts of self-enhanced polylactic acid fiber, 1-30 parts of vertical compound crystal polylactic acid micro-fiber and 70-99 parts of polylactic acid substrate are contained. The preparation method of the fiber comprises the following steps: firstly, respectively carrying out vacuum drying on PLLA (poly L lactic acid) and PDLA (poly D lactic acid); physically mixing PLLA with PDLA after being dried; fusing the mixture; collecting primary fibers under the conditions that a spinning temperature is 225-245 DEG C and a spinning speed is 500-2500 meters per minute; and thermally drafting and thermally shaping the primary fibers. Compared with the common polylactic acid fiber, the self-enhanced polylactic acid fiber disclosed by the invention has the advantages of higher constant temperature mechanical strength, higher high temperature mechanical strength and lower boiling water shrinkage, so that the use demand is met and the application field is expanded.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Distributed scheduling method based on same interface
ActiveCN103905550AReduce off-site installationReduce unified managementTransmissionService implementationDistributed computing
The invention provides a distributed scheduling method based on the same interface. The distributed scheduling method involves a scheduling engine, a service interface plug-in and a plurality of service implementation plug-ins and comprises the following steps that access requests are classified; the number of servers required by page views and the number of service implementation plug-ins required by the page views are calculated out; the servers of the server implementation plug-ins implementing the interface in a cluster are found; certain servers meeting requirements and having the lightest loads are found; the scheduling engine distributes the requests to the service implementation plug-ins of the certain servers, so that distributed computation and parallel computation are conducted, and results are gathered and output; after the requests are executed, the scheduling engine releases the service implementation plug-ins. According to the distributed scheduling method based on the same interface, dynamic increasing and decreasing of the service implementation plug-ins are achieved, performance bottlenecks of a single service plug-in are overcome, and therefore performance of an application system is promoted.
Owner:LINEWELL SOFTWARE
A Parallelization Method for Distributed Hydrological Simulation in Cluster Environment
ActiveCN103092572BBreak through performance bottlenecksImproving the Efficiency of High-Resolution Distributed Hydrological ModelingConcurrent instruction executionSpecial data processing applicationsHydrological modellingParallel algorithm
Disclosed is a parallelization method of distributed hydrological simulation under cluster environment. Confluence process calculation which is a limiting factor in parallel computation of the distributed hydrological simulation and slope process calculation with good parallelism are distinctively treated, a parallel algorithm under the cluster environment is researched and developed, so that calculation efficiency is improved. The technical scheme includes that the method comprises the steps: carrying out substream partition and classification; serving the substream as a template, subdividing input data and storing the data into a data bank; serving the area of the substream as a measurement index of calculated amount, at the same time, considering a topological relation among substreams and carrying out partition of calculation tasks; serving the substream as a unit, carrying out parallel computation under the cluster environment, wherein the slope process calculation adopts a static scheduling, and the watercourse process calculation adopts a dynamic scheduling; and writing a result into the data bank after the calculation is finished. According to the parallelization method of the distributed hydrological simulation under the cluster environment, performance bottlenecks of an existing parallelization method of the distributed hydrological simulation under the cluster environment are broken through, parallel performance is remarkably improved, and application prospect in aspects of large-watershed high-resolution distributed hydrological simulation is wide.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
A Low Power Consumption 12-bit Pipelined Successive Approximation Analog-to-Digital Converter
ActiveCN104320141BImprove performanceReduce power consumptionAnalogue/digital conversionElectric signal transmission systemsDigital down converterAudio power amplifier
The invention discloses a 12-bit pipelined successive approximation analog-to-digital converter with low power consumption, which comprises a 6-bit sub-level successive approximation analog-to-digital converter, an operational amplifier, a 7-bit sub-level successive approximation analog-to-digital converter and a digital delay calibration unit. The residual signal output of the 6-bit sub-stage successive approximation analog-to-digital converter is connected to the input terminal of the operational amplifier, and the digital signal of the 6-bit sub-stage successive approximation analog-to-digital converter is output to the high six input terminals of the digital delay calibration unit, The output end of the operational amplifier is connected to the input end of the 7-bit sub-stage successive approximation analog-to-digital converter, and the digital signal output of the 7-bit sub-stage successive approximation analog-to-digital converter is connected to the lower six inputs of the digital delay calibration unit end. The invention can effectively realize the combination of the pipeline analog-to-digital converter and the successive approximation comparator, effectively improve the comprehensive performance of the analog-to-digital converter, has lower power consumption than similar analog-to-digital converters, and has wide application prospects in deep submicron technology.
Owner:SOUTH CHINA UNIV OF TECH
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