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Onboard driver, vehicle and fleet data mining
ActiveUS7715961B1Avoid expensiveReduce operating costsVehicle testingCoupling device connectionsSystem usagePrivacy preserving
The method and system use onboard data stream mining for extracting data patterns from data continuously generated by different components of a vehicle. The system stores the data patterns in an onboard micro database and discards the data. The system uses a resource-constrained, small, lightweight onboard data stream management processor, with onboard data stream mining, an onboard micro database, and a privacy-preserving communication module, which periodically and upon request communicates stored data patterns to a remote control center. The control center uses the data patterns to characterize the typical and unusual vehicle health, driving and fleet behavior.
Owner:AGNIK
Preparation method for transparent silver nanowire conducting electrode
ActiveCN104658700AGood application prospectGood light transmission and conductivityConductive layers on insulating-supportsFinal product manufactureTransmittanceNanometre
The invention discloses a preparation method for a transparent silver nanowire conducting electrode. The preparation method comprises the following steps: (1) preparing a high length-diameter ratio silver nanowire solution; (2) conducting hydrophilization on a substrate; (3) coating the prepared silver nanowire solution on the substrate, and carrying out drying to obtain a transparent silver nanowire conducting thin film on the substrate; (4) conducting adhesion treatment on the transparent silver nanowire conducting thin film and the substrate; (5) exposing the transparent silver nanowire conducting thin film treated with adhesion to ultraviolet light, so as to obtain the transparent silver nanowire conducting electrode, wherein the adhesive force between the transparent silver nanowire conducting electrode and the substrate is high. The transparent silver nanowire conducting electrode prepared according to the method is excellent in carrier collection efficiency and relatively high in light transmittance, can improve the conductibility of a front electrode of a solar battery, reduce reflectivity, and potentially improve battery efficiency and reduce production cost, and is high in mechanical and environmental stability, and suitable for large-area low-cost preparation.
Owner:SOUTH CHINA NORMAL UNIVERSITY
DC/AC converter to convert direct electric voltage into alternating voltage or into alternating current
ActiveUS7046534B2Improve efficiencyAvoid complicationsConversion with intermediate conversion to dcDc-dc conversionRectifier diodesInductor
A DC / AC converter is disclosed having two DC voltage connections (1,2), between which are provided in a parallel circuit configuration, an intermediate energy storage (C1) and a bridge circuit providing at least two parallel branches, each branch providing two in-series-connected switch units (A,B and C,D), to each of which a rectifier diode (DA,DB,DC DD) is connected in parallel, and having at least two AC connections, of which each single AC connection is connected via a connecting line, in each of which an inductor (L1 respectively L2) is provided, to one of the parallel branches of the bridge circuit between two the switch units (A,B respectively C,D) via one connecting node. In at least two connecting lines, two separate electrical connecting paths are provided, in each of which a switch (E respectively F) and an in-series-switched rectifier diode (DE respectively DF) are provided. The rectifier diodes (DE,DF) in the single connecting paths are switched in an opposite conducting direction.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
Determining the importance of data items and their characteristics using centrality measures
InactiveUS20120278261A1Avoid expensiveAvoids non-parallelizable operationDigital data processing detailsDigital computer detailsNODALPath length
Computer-implemented methods, systems, and articles of manufacture for determining the importance of a data item. A method includes: (a) receiving a node graph; (b) approximating a number of neighbor nodes of a node; and (c) calculating a average shortest path length of the node to the remaining nodes using the approximation step, where this calculation demonstrates the importance of a data item represented by the node. Another method includes: (a) receiving a node graph; (b) building a decomposed line graph of the node graph; (c) calculating stationary probabilities of incident edges of a node graph node in the decomposed line graph, and (d) calculating a summation of the stationary probabilities of the incident edges associated with the node, where the summation demonstrates the importance of a data item represented by the node. Both methods have at least one step carried out using a computer device.
Owner:IBM CORP
Preparation method of high-strength flue gas denitration catalyst
ActiveCN103769137ALarge specific surface areaHigh strengthDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsGlass fiberWear resistant
The invention discloses a preparation method of a high-strength flue gas denitration catalyst. The preparation method comprises the following steps: taking titanium sulfate as the titanium source and critic acid as the complexing agent to prepare a TiO2-SiO2 composite carrier through an impregnation method, loading an active component and an auxiliary agent on the TiO2-SiO2 composite carrier so as to obtain denitration catalyst powder, mixing the denitration catalyst powder with glass fiber, wood slurry, polyacrylamide, carboxymethyl cellulose, ammonia water, and deionized water, and then subjecting the mixture to processes of kneading, aging, extruding, drying, and burning so as to obtain a honeycomb denitration catalyst. The preparation method has the advantages of simple preparation technology, low cost, and tight combination between TiO2 and SiO2 in the composite carrier. The prepared denitration catalyst has the advantages of good mechanical strength, wear-resistant property, and catalytic activity.
Owner:CHINA PETROLEUM & CHEM CORP +1
Planetary gear case fault diagnosis method based on order complexity
InactiveCN105806613AAvoid influenceAvoid expensiveMachine gearing/transmission testingTime domainDiagnosis methods
The invention belongs to the technical field of rotation machinery fault diagnosis, especially relates to a planetary gear case fault diagnosis method based on order complexity, and is specially applied to a fault diagnosis method of a wind power planetary gear case under a variable working condition. The method comprises the following steps: preprocessing vibration signals; dividing faults of a planetary gear train into two kinds; obtaining a fault feature parameter; analyzing the vibration signals under a variable working condition of a planetary gear case; and performing instance verification discovery. According to the invention, the influence of the variable working condition can be avoided by use of an order analysis method, and the Lempel-Ziv complexity of angle-domain signals after order analysis processing is more stationary than that of time-domain signals. According to the Lempel-Ziv complexity of the vibration angle-domain signals of the planetary gear case, local faults and distribution faults of planetary gears can be identified, through simulation and analysis of actual cases, the effectiveness of the method is verified, and at the same time, under the condition of lack of fault data, the complexity can also be taken as the feature parameter for determining whether there is a fault or not.
Owner:ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +2
Method for recovering waste thermosetting resin and composite materials thereof through solvents
ActiveCN102617885AReduce usageLess investmentPlastic recyclingBulk chemical productionSolventPolyresin
The invention discloses a method for recovering waste thermosetting resin and composite materials thereof through solvents, which includes: adding 100 parts of waste thermosetting resin and composite materials of the waste thermosetting resin and 0-10 parts of catalysts into 10-500 parts of solvents for evenly stirring and mixing, heating the mixture to lead temperature rise to 60-200 DEG C to react for 5-600 minutes, and separating solid phase products and liquid phase products obtained through reaction for recycling. The solvents adopted in the method are environment-friendly, safe and stable and has a capability of degrading thermosetting resin junctions in catalyzing mode so that efficient degradation in conditions of ordinary pressure and low temperature is achieved, energy is saved, expensive reaction devices are not used, investment is small, production cost is low, and simultaneously integral high-value recovery of resin materials can be achieved.
Owner:SICHUAN UNIV
Method, terminal and base station for triggering terminal to transmit measurement reference signals
ActiveCN102014506AAvoid wasteful situationsAvoid expensiveCriteria allocationTransmission monitoringResource informationVIT signals
Embodiments of the present invention disclose triggering method, terminal and base station. The method comprises the following steps: obtaining the requirement information of measurement, wherein the requirement information comprises position and bandwidth of a frequency range to be measured; selecting resources from at least two predetermined resource patterns for the terminal according to the requirement information, wherein each of at least two predetermined resource patterns is respectively provided with a plurality of resource information in advance for indicating the resources; triggering the terminal to transmit a measurement reference signal by using the selected resources. In the technical scheme, different measurement requirements have the corresponding resource information, so the resources are matched flexibly; different measurement requirements can be satisfied; the phenomenon of high PDCCH expense or resource waste in the prior art is avoided.
Owner:SNAPTRACK
Optical system of multispectral area array CCD (Charge Coupled Device) imager
InactiveCN101866054AImprove performanceHighly integratedSpectrum investigationOptical elementsAviationOptic system
The invention discloses an optical system of a multispectral area array CCD (Charge Coupled Device) imager, relating to the field of design and manufacture of the optical system of the multispectral area array CCD imager and solving the problems that the traditional multispectral imager can only obtain spectrum information of a certain wave band of a target at the same time and can not realize the design requirements of a multispectral optical system with wide wave band range and temperature range and a long back working distance. The system consists of two sets of subsystems, a first set of subsystem realizes spectrum information of untraviolet, blue, green, red and infrared wave bands, and the system obtains information of different wave bands through two lens sets and a corresponding detector and carries out imaging; and a second set of subsystem image the obtained information by adopting two germanium lenses and a long wave infrared detector to realize spectrum information of a long wave infrared wave band. The invention realizes simultaneously imaging of a target at six wave bands by adopting two sets of optical systems and is suitable for multispectral imaging places with strict requirements on the volume and the weight, such as aviation shooting.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Method for extracting region of interest of palmprint in non-contact manner in complex environment
InactiveCN107609499AReduce usageAvoid expensiveImage analysisCharacter and pattern recognitionPalm printComputer graphics (images)
The invention provides a method for extracting a region of interest of a palmprint in a non-contact manner in a complex environment, which includes the following steps: collecting a palmprint image; extracting a binary image of the palm foreground; filling the holes of the binary image and removing the small-area regions of the binary image; adjusting the palm angle in the binary image to make thetip of the middle finger on the topmost in the image; determining the search scope of maximum effective inscribed circle by detecting the fingertip position and the valley point position; carrying out range transformation on the binary image after adjustment, traversing the search scope obtained in the previous step, and limiting the proportional relationship between the center and radius of theinscribed circle and the length of the middle finger to get a maximum effective inscribed circle; and rotating the maximum effective inscribed circle to get an image of a region of interest of the palmprint. The method can be used to carry out binaryzation, contour extraction, key point location, translation, rotation correction and palmprint center region-of-interest extraction on a palmprint image collected by a high-pixel mobile phone in a complex environment.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Apparatus and method for determining valid data during a merge in a computer cluster
InactiveUS20040010538A1Avoid expensiveEfficiently determinedResource allocationMultiple digital computer combinationsComputer clusterApplication software
A logical clock is provided that is incremented each time there is a membership change in a cluster of computer systems. The value of the logical clock is written as part of each data record created or modified by the cluster on behalf of a user. When a partition occurs, and a merge then follows the partition, a partition merge processing mechanism transmits a node list and data record headers (i.e., data records without their associated data) from a computer that was in the first partition to the computers that were in the second partition, and transmits a node list and data record headers from a computer that was in the second partition to the computers that were in the first partition. The partition merge processing mechanism then determines from the values of the logical clock in the data record headers and in the local data records where the most recent data resides. If data was updated in only one partition during the partition, the data is copied to the computers that were in the other partition. If data was updated in both partitions, the partition merge processing mechanism marks the conflicting data records. An application that sees conflicting data records can then take appropriate action, such as aborting or resetting the transactions that caused the independent updates. The preferred embodiments efficiently determine where valid data resides during a merge in a computer cluster, making it possible to avoid the costly overhead of maintaining and processing history logs.
Owner:IBM CORP
DC/AC converter to convert direct electric voltage into alternating voltage or into alternating current
ActiveUS20050174817A1Avoid disadvantagesImprove efficiencyConversion with intermediate conversion to dcDc-dc conversionRectifier diodesEngineering
A DC / AC converter is disclosed having two DC voltage connections (1,2), between which are provided in a parallel circuit configuration, an intermediate energy storage (C1) and a bridge circuit providing at least two parallel branches, each branch providing two in-series-connected switch units (A,B and C,D), to each of which a rectifier diode (DA,DB,DC DD) is connected in parallel, and having at least two AC connections, of which each single AC connection is connected via a connecting line, in each of which an inductor (L1 respectively L2) is provided, to one of the parallel branches of the bridge circuit between two the switch units (A,B respectively C,D) via one connecting node. In at least two connecting lines, two separate electrical connecting paths are provided, in each of which a switch (E respectively F) and an in-series-switched rectifier diode (DE respectively DF) are provided. The rectifier diodes (DE,DF) in the single connecting paths are switched in an opposite conducting direction.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
Method, equipment and system for achieving video retrieval
ActiveCN103248853AReduce retrieval costsEasy to findTelevision system detailsRecord information storageTime informationVideo retrieval
Owner:HUAWEI TECH CO LTD
Separating method and equipment of low-carbon olefins beneficial to product recovery
ActiveCN103304358AHigh operating temperatureAvoid explosionHydrocarbonsAdsorption purification/separationRefrigeration compressorCooling tower
The invention discloses a separating method and corresponding equipment of low-carbon olefins beneficial to product recovery. The separating method comprises the steps of: pretreating and delivering oxygenated chemical-converted low-carbon olefin flow into a depropanization system, cooling and delivering top products of the depropanization system into a demethanizing tower, cooling the top of the demethanizing tower only with a propylene refrigerant, delivering vapor phase at the tower top into a pressure swing adsorption device for recovering ethylene, returning the recovered crude ethylene gas back before a segment of compressor to be mixed with low-carbon olefin reaction gas flow, so that a copious cooling cold box and an ethylene refrigeration compressor are omitted, and the fixed investment and energy consumption can be reduced. Compared with the prior art, the separating method and corresponding equipment have the advantages of being low in separating energy consumption, high in material recovery rate, small in influence on the following ethylene and propylene separation, and the like.
Owner:CHINA CONSTR IND & ENERGY ENG GRP CO LTD +1
Optimization of multi-table lookups for software-defined networking systems
InactiveUS20180083876A1Improve performanceEliminate cache thrashingData switching networksNetworked systemOpenFlow
To optimize the multi-table search process, the present disclosure defines a method in which searching across multiple OpenFlow tables is consolidated into searching across a set of three distinct flow caches called access control, application, and forward flow caches. Each OpenFlow table is mapped into one of these flow caches based on the size of the table and whether it contains flows of different priority. The mapping rule ensures that large (in terms of number of entries) OpenFlow tables with no conflicting priority rules are mapped to a flow cache. The disclosed techniques reduce the number of searches and, at the same time, selectively avoid a costly process of revalidation of entries in the flow cache when new higher-priority flows are added by the SDN controller.
Owner:RADISYS CORP
DC-AC inverter for photovoltaic systems
ActiveCN103828217AReduce electric shockReduce riskPhotovoltaicsSingle network parallel feeding arrangementsElectricityEngineering
The present invention relates to a DC-AC inverter comprising a plurality of H-bridge converters (101, 102, etc.), each being arranged to be integrated with a respective photovoltaic element (108, 109, etc.) and to be supplied with a DC voltage from the photovoltaic element, the H-bridge converters further being cascaded to produce a multilevel voltage output (Vout). The DC-AC inverter further comprises switch control circuitry connected to each one of the plurality of H-bridge converters to control switching thereof for producing the multilevel voltage output, and a central adaptation unit connected to the cascaded H-bridge converter for adapting the multilevel voltage output such that an AC grid voltage is output from the DC-AC inverter.
Owner:MARICI HLDG THE NETHERLANDS BV
Large-area perovskite film, perovskite solar cell module and manufacturing method
InactiveCN107293644APrecisely control the degree of crystallizationPrecise control of grain sizeSolid-state devicesSemiconductor/solid-state device manufacturingAnti solventPerovskite solar cell
The invention relates to a large-area perovskite film, a perovskite solar cell module and a manufacturing method. The manufacturing method of the large-area perovskite film comprises the steps of providing an initial solution to a conductive substrate so as to form a film material, wherein perovskite is represented by a general expression ABX3, and a solute of the initial solution at least comprises A, B and X; and applying an anti-solvent to the film material.
Owner:NAT CENT UNIV
Method for safely and quickly extracting genomic deoxyribose nucleic acid (DNA) from blood
InactiveCN102604935AReduce mechanical shear damagePrevent and inhibit degradationDNA preparationSulfonateGenomic DNA
The invention discloses a method for safely and quickly extracting a genomic deoxyribose nucleic acid (DNA) from blood. The method comprises the following steps of: lysing a blood cell by using TritonX-100 and sodium dodecyl sulfonate (SDS), precipitating a protein with saturated NaCl, separating the protein through centrifugation, and reducing the mechanical shearing damage of a solution to the DNA; preventing and inhibiting the degradation of deoxyribonuclease (DNase) to the DNA; excluding the pollution caused by organic solvent, metal ions and other cnucleic acid molecules; and reducing the protein, polyoses, lipids and the like to the lowest degree, wherein the extracted DNA has certain length, and substances which inhibit enzymes exist in the genomic DNA after purification. The method for extracting the genomic DNA from the animal blood is harmless, quick and simple in operation.
Owner:邢秀梅
Linear motor and method for operating a linear motor
InactiveUS7786685B2Easy to controlAvoid expensiveMotor/generator/converter stoppersAC motor controlEngineeringLinear motor
A linear motor includes a primary part arranged as a guideway stator and at least one secondary part that is movable with respect to the primary part, the at least one secondary part having device(s) for controlling the generation of a magnetic field, causing its motion, in the primary part. It is possible to avoid costly control devices for the application of current to the stator.
Owner:BOSCH REXROTH AG
Control node, method and system for asynchronous positioning
ActiveCN103344942AAvoid expensiveAvoid deployment overly complex issuesPosition fixationNetwork packetTime difference
Provided is a method for asynchronous positioning. The method for the asynchronous positioning comprises the following steps of (1) sending an order data packet to a reference label with a known position; (2) receiving time differences output by four reference nodes, wherein the time difference output by each reference node is a difference between the time when a reference measuring signal is received by each reference node and the time when a positioning measuring signal is received by each reference node, each reference measuring signal is output when the reference label receives a first order data packet, and each positioning measuring signal is output by a label to be positioned; (3) calculating the position coordinate of the label to be positioned according to the position coordinate of the reference label, the position coordinate of each reference node, and the time difference of each reference node. The invention further relates to a control node and a system for the asynchronous positioning, and the system for the asynchronous positioning is provided with the control node.
Owner:TSINGHUA UNIV +1
Silicon dioxide aerogel, as well as continuous constant-pressure drying preparation method and system thereof
The invention discloses slicon dioxide aerogel, as well as a continuous constant-pressure drying preparation method and a system thereof. The preparation method comprises the following steps of: using water glass, silicasol, silanol and the like which are relative low in price as silicon sources, uniformly mixing the silicon sources, water, a catalyst and a drying control agent to obtain a mixture, leaving gel to stand, crushing the wet gel into particles or powder, performing replacement with alcohol and liquid alkane, using a hydroghobing agent for modification, separating alkane gel, and finally, performing drying and sintering so as to obtain dewatering silicon dioxide aerogel. The silicon dioxide aerogel disclosed by the invention can realize continuous production, and is short in preparation period, small in pollution, low in cost and environment-friendly. The aerogel is powder or particles, the density is 0.04g / ml-0.3g / ml, the particle diameter is 0.1 mum-2mm, the specific surface is 500m<2> / g-1200m<2> / g, and the heat conductivity is 0.01W / mk-0.04W / mk.
Owner:苏州同玄新材料有限公司
Nucleic acid aptamer electrochemical sensor based on metal organic framework materials as signal probes
ActiveCN108169303AEasy to passSimplify detection stepsMaterial electrochemical variablesAptamerAβ oligomers
The invention relates to a nucleic acid aptamer electrochemical sensor based on metal organic framework materials (MOFs) as signal probes. The senor is used for detection of beta-amyloid (A beta) oligomers and belongs to the technical field of functional nanocomposite materials and biosensor detection. AuNFs-modified glassy carbon electrodes immobilize a first layer of aptamers, the A beta oligomer is further identified and through combination with second layer aptamer-modified gold nanoparticle-loaded Cu-MOFs (AuNPs / Cu-MOFs), the sandwich electrochemical sensor for detection of the A beta oligomer is formed. AuNPs / Cu-MOFs as a redox medium can directly detect a Cu<2+> signal and electrochemically active molecule labeling is avoided so that the detection processes are greatly simplified and the sensitivity of detection is improved.
Owner:SHANGQIU NORMAL UNIVERSITY
Ultrasonic-assisted microwave controllable preparation method of Cu2ZnSnS4 nano-particles
InactiveCN103420411AFast responseAvoid expensive vacuum equipmentMaterial nanotechnologyTin compoundsQuantum dotLithium electrode
The invention relates to an ultrasonic-assisted microwave controllable preparation method of Cu2ZnSnS4 nano-particles and belongs to the field of inorganic materials. On the basis of optimizing the formula, the microwave power and the time of a reaction solution, controllable preparation of the Cu2ZnSnS4 nano-particles is realized through adjusting the ultrasonic power. As the performance of the nano-particles is greatly influenced by the shapes and the sizes of the nano-particles, the Cu2ZnSnS4 nano-particles in different shapes and sizes have different application values. The particles with the particle sizes smaller than 10 nm are Cu2ZnSnS4 quantum dots with better luminous performance, the nano-particles with bigger particle sizes can be used for preparing ink, the ink is then used for preparing a Cu2ZnSnS4 film serving as an absorbing layer of a solar cell, and the Cu2ZnSnS4 particles of which the particle sizes reach the quasi micron size can be used as an anode material of a lithium ion battery. Therefore, controllable preparation of the Cu2ZnSnS4 nano-particles is very important. The inexpensive and easy-to-implement method is adopted to successfully prepare the Cu2ZnSnS4 particles in different particle sizes and different shapes.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Method and device for data aggregate query
ActiveCN104504154AImprove the efficiency of aggregate queriesAvoid expensiveSpecial data processing applicationsNetwork communicationDistributed computing
The invention provides a method and device for data aggregate query. The method comprises the following steps: executing the aggregate query to the self-stored data by a first node, wherein the node is the node of non-share architecture; gathering the data obtained by executing the aggregate query of the first node to a second node; and executing the aggregate query to the data obtained by executing the aggregate query of the first node through a second node. The device comprises a first executing module for executing the aggregate query to the self-stored data by the first node, wherein the node is the node of non-share architecture; a gathering module for gathering the data obtained by executing the aggregate query of the first node to the second node; and a second executing module for executing the aggregate query to the data obtained by executing the aggregate query of the first node through the second node. The technical scheme of the method and device is used for effectively reducing the network communication overhead of the data aggregate query, and improving the efficiency of the data aggregate query.
Owner:DAWNING INFORMATION IND BEIJING +1
Measurement configuration method, terminal and base station
ActiveCN109151884AReduce overheadAvoid expensiveConnection managementCommunications systemComputer terminal
The embodiments of the present invention provide a measurement configuration method, a terminal, and a base station. The measurement configuration method includes the following steps that: a first measurement configuration and a second measurement configuration are received, wherein the first measurement configuration includes the information of the frequency point of a first communication system,the second measurement configuration includes the information of the frequency point of a second communication system; and a configured measurement interval configuration is received, optionally, themeasurement interval configuration includes the measurement interval of the frequency point measurement of the first communication system, and the measurement interval of the frequency point measurement of the second communication system. With the measurement configuration method, the terminal, and the base station of the invention adopted, the problem of large signaling overhead for the measurement capability reporting of a terminal can be solved.
Owner:CHINA MOBILE COMM LTD RES INST +1
Communication device, cavity filter, resonating tube and manufacturing method thereof
ActiveCN101877427ASolve the temperature drift index problemReduce usageWaveguide type devicesQuartzCommunication device
The embodiment of the invention discloses a cavity filter, a resonating tube and a manufacturing method thereof, wherein the resonating tube is arranged in the cavity of the cavity filter and is made of quartz glass, the resonating tube surface is metalized and during the metallization treatment on the resonating tube surface, firstly the surface is chrome plated in vacuum, then suffered to electrocoppering and silver treatment. Compared with the traditional resonating tube which is made of invar material, the resonating tube which is made of quartz glass material has low cost and good temperature drift index. Moreover, the embodiment of the invention also discloses a communication device which uses the cavity filter, the cavity filter is arranged at a signal transmit-receive circuit part of the communication device, equipment cost can be effectively reduced by adopting the resonating tube which is made of quartz glass material.
Owner:ANHUI TATFOOK M&E TECH
TDD schema channel data transmission method and a base station
ActiveCN101383654AReduce overheadAvoid expensiveRadio/inductive link selection arrangementsRadio transmission for post communicationChannel dataData transmission
The invention discloses a down channel data transmission method of a TDD mode and a corresponding base station, and an up channel data transmission method of the TDD mode and a corresponding base station, which are used for solving the problem that the signaling cost needing to obtain the channel quality information is larger when the channel data transmission of the TDD mode is performed by the prior art. The down channel data transmission method of the TDD mode provided by the invention comprises the following steps: the up channel quality information is obtained; the down channel quality information is determined according to the up channel quality information; according to the down channel quality information, a down data packet is assembled, and the down data packet is transmitted by a down channel. The invention is used for the channel data transmission of the TDD mode, and can effectively lower the signaling cost needing to obtain the channel quality information during the channel data transmission of the TDD mode.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Method and system for identifying SAR deception jamming target based on differential feature enhancement
ActiveCN106291494AImprove the ability of anti-spoofing interferenceIncreased cost of anti-spoofing jamming upgradesRadio wave reradiation/reflectionRadar imagingOriginal data
The invention discloses a method and a system for identifying an SAR deception jamming target based on differential feature enhancement. The method comprises steps: blended data of real SAR scene echo and SAR deception jamming are acquired, a data matrix is generated after correction processing, and reference signals are generated; through different processing steps, a first-position one-dimensional image containing all information and a second-position one-dimensional image after jamming feature suppression are generated respectively from the data matrix, and after further processing, a differential feature image matrix is obtained; a rectangular window is adopted to process the differential feature image matrix, and gray histogram data and a reference gray histogram are generated; and when the matching distance between the gray histogram and the reference histogram is larger than a preset threshold, a deception jamming target is identified. Differential features of imaging radar original data in different imaging method are enhanced, the deception jamming target is identified in the SAR image, the ability of the imaging radar against deception jamming target is improved, and the cost is reduced.
Owner:SHENZHEN UNIV
SPARQL query optimization method based on graph traversal
ActiveCN107291807AReduce generationAvoid expensiveSpecial data processing applicationsGraph traversalQuery optimization
The invention discloses an SPARQL query optimization method based on graph traversal. The method comprises the steps of 1), expressing triples in RDF (Resource Description Framework) data through utilization of an attribute graph and storing the RDF data through utilization of a Bigtable model, thereby obtaining Bigtable data corresponding to the RDF data; 2), converting SPARQL query into traversal for the RDF attribute graph; and 3), traversing all nodes satisfying conditions in the Bigtable data according to a traversing sequence obtained in the step 2), thereby finishing the SPARQL query. According to the method,
Owner:COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
An adjustable tripod type offshore foundation structure and its construction method
InactiveCN102296623AAchieve levelingEasy to operateFoundation engineeringEngineeringStructure system
The invention discloses a tripod type leveling offshore foundation structure which comprises a foundation main body part, a leveling device and a dry type cabin grouting device, wherein the foundation main body part comprises a steel pipe type tripod and a pile body, the leveling device comprises three closed cylinder bodies, and the dry type cabin grouting device comprises three closed dry type cabins. A construction method comprises the steps of: positioning a tripod through a hoisting device and piling through a piling guide pipe, leveling through the leveling device, installing an offshore tool, measuring the levelness of a foundation structure for secondary leveling, connecting cabin covers of the dry type cabins in a sealing manner, injecting gas in the dry type cabins for discharging a water body and grouting, and solidifying a pile tube and the piling guide pipe into a whole. The invention has the advantages of capability of realizing leveling and grouting operations of a foundation structure system by adopting a leveling structure system and a dry type cabin grouting structure system, simpleness and rapidness in construction, less quantity of required construction devices, avoidance of an expensive underwater grouting construction device, low construction cost and low comprehensive cost.
Owner:TIANJIN UNIV
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