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Multi-network cooperative network optimization and energy saving method and system
ActiveCN105357692ABig spaceReduce labor costsPower managementHigh level techniquesSimulationCell lists
The invention discloses a multi-network cooperative network optimization and energy saving method and system, and belongs to the field of mobile communications. The method comprises the following steps: computing neighbor cell overlapping coverage of network cells, screening out overlapping coverage neighbor cells of the network cells, and adding the network cells and the overlapping coverage neighbor cells of the network cells as energy saving cells into an energy saving cell list; and determining energy saving time periods of each day, computing predicted traffic of the cells in the list at a next energy saving time period according to history traffic of the energy saving time periods and traffic of a previous time period, determining dormant cells in the energy saving cell list according to the predicted traffic, determining compensation cells of the dormant cells in the energy saving cell list, shutting down the dormant cells, and transferring services on the dormant cells onto other compensation cells. The method and the system support cross-network and cross-equipment-manufacturer multi-network cooperative optimization and energy saving analysis. Compared with the conventional manual optimization, the method and the system have the advantages that a large amount of labor cost can be saved, and the network optimization and energy saving effects are enhanced greatly.
Owner:BEIJING TUOMING COMM TECH
Multi-parameter time-varying robot spraying method
ActiveCN104324861AImprove efficiencyImprove spray qualityLiquid surface applicatorsSpraying apparatusFree formEngineering
The invention relates to a multi-parameter time-varying robot spraying method which comprises the following steps: firstly, establishing a free-form surface multivariable spraying model which uses flow of a spraying gun, a spraying distance and a spraying speed as model independent variables; then discretizing an original spraying path into a plurality of sections of minute sub paths, distributing initial values of time-varying spraying process parameters to each sub path and on the basis of the established multivariable spraying model, predicting distribution of an initial coating thickness; next, on the basis of a prediction result on distribution of the coating thickness, carrying out combined optimization on the time-varying process parameters to obtain the optimal process parameters on each section of sub path and finally, obtaining a multi-parameter time-varying spraying path of a surface to be sprayed. According to the method disclosed by the invention, various process parameters are used as variables; by the multivariable spraying model and a free-form surface coating thickness predicting method, the optimal process parameters on the sub paths of the discretized spraying path are obtained; dynamic optimization of the process parameters is implemented; the multi-parameter time-varying robot spraying method has the important effect of improving spraying operation efficiency, quality and safety of a robot.
Owner:清研同创机器人(天津)有限公司
Preparation and application of all-inorganic perovskite cell based on transition metal ion doping
ActiveCN110047951AIncrease binding energyInhibition formationFinal product manufacturePhotovoltaic energy generationHole transport layerCrystallinity
The present invention provides an all-inorganic perovskite solar cell based on transition metal ions doped CsPbBr<3> and a preparation method and an application thereof. Specifically, the invention isthat conductive glass is first spin-coated with an electron transfer layer and subsequently spin-coated with a lead bromide solution mixed with transition metal ions, then is spin-coated with a cesium bromide solution repeatedly; the non-porous perovskite film with a high crystallinity and a large grain size is prepared; and finally the all-inorganic perovskite solar cell based on transition metal ions doped CsPbBr<3> is assembled by blade coating of carbon back electrode. The invention reduces the defect density in the perovskite film by doping transition metal ions, simultaneously the energy band structure is adjusted; the energy loss of charge migration is reduced; and the separation, extraction and transfer of photogenerated charges and charge recombination are reduced, thereby the photoelectric conversion efficiency and long-term operation stability of the cell are improved. The invention has the advantages such as simple and feasible preparation method, large optimization spaceof material combination, no noble metal back electrode or hole transporting layer and low cost.
Owner:OCEAN UNIV OF CHINA
Ultrasonic imaging method based on ZYNQ FPGAs
ActiveCN105534546AReduce power consumptionAbundant resourcesInfrasonic diagnosticsUltrasonic/sonic/infrasonic image/data processingUltrasonic imagingMiniaturization
The invention discloses an ultrasonic imaging method based on ZYNQ FPGAs. The method specifically comprises the steps of 1, designing ultrasonic signal transmission control and signal receiving programs by means of Vivado HLS software built in ZYNQ FPGAs to control an ultrasonic transceiver chip and acquire data required by ultrasonic imaging; 2, processing received ultrasonic echo signals through the Vivado HLS software by means of the PL part in ZYNQ; 3, optimizing a processed ultrasonic echo image and transmitting the processed image to the rear end through SDK software by means of the PS part in ZYNQ. By the adoption of the method, the whole process of ultrasonic imaging is realized in ZYNQ, the integration level of control chips is effectively increased, and the size of ultrasonic imaging equipment is reduced; meanwhile, by means of the Vivado HLS software and the SDK software, research and development efficiency is effectively improved, development difficulty is reduced, the transportability of the method is improved, and the method is quite suitable for small products such as portable wireless ultrasonic imaging equipment.
Owner:HARBIN INST OF TECH
Video auditing method based on multiple levels and multiple models, medium and computer equipment
ActiveCN111385602AImprove review efficiencySave spaceCharacter and pattern recognitionSelective content distributionEngineeringThresholding
The invention provides a video auditing method and device based on multiple levels and multiple models, a computer readable storage medium and computer equipment, and the method comprises the steps: inputting a video picture obtained after a video stream is processed into a first-level auditing model, and obtaining a first violation score; inputting the video picture of which the first violation score is greater than a first preset threshold into a second-level auditing model to obtain a second violation score; processing the second violation score according to a preset machine learning algorithm to obtain a final violation score of the video stream, and outputting an unqualified auditing result of the video stream when judging that the final violation score is higher than a second presetthreshold. According to the invention, a multi-level and multi-model structure and an xgboost fitting score mode are adopted, so the redundant overhead is reduced while multiple models are used, and the online video auditing efficiency is improved efficiently.
Owner:BIGO TECH PTE LTD
Neural network compiling method and system, and corresponding heterogeneous computing platform
PendingCN111104120AImprove execution efficiencyImplement dynamic schedulingCompiler constructionParser generationResource poolAlgorithm
The invention discloses a neural network compiling method and a system, and a corresponding heterogeneous computing platform. The method comprises the steps that a trained NN model is acquired; and the trained NN model is input to an NN compiler to generate an NN binary file including graph structure information corresponding to the NN model. Therefore, graph optimization during operation is realized. Furthermore, the graph structure information can be realized as a node resource pool in the NN binary file, together with file headers and free segmentation settings, so that the compiling universality and flexibility for various neural network algorithms can be improved.
Owner:XILINX INC
Scheduling method considering incoming water correlation cascade hydropower stations
ActiveCN105809349AImprove efficiencyLarge room for optimizationCharacter and pattern recognitionResourcesState of artApplicability domain
The invention relates to a scheduling method considering incoming water correlation cascade hydropower stations, the method is characterized in that, the method comprises the following steps: 1) a cascade hydropower stations random scheduled mathematical model is established; 2) random natural incoming water variables related to the cascade hydropower stations are sampled, and a sample matrix Rs is obtained; 3) a vector quantization algorithm is adopted to arrange all sample scenes in sample matrix Rs, various sample scenes are distributed to different scene kinds, and core scene sets of various scene kinds are acquired; 4) according to the cascade hydropower stations random scheduled mathematical model and core scene sets, a sensitivity analysis method is adopted to randomly schedule, schedule target objective function YRs of all sample scenes in the sample matrix Rs are acquired; 5) the schedule target objective function YRs are calculated to acquire probability statistics information of scheduling benefits. Compared with the technology in the prior art, the method provided by the invention has advantages of fast, reliability, high selectivity, considered incoming water correlation, wide application range and the like.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER +1
A symbol-level precoding method in a multi-user downlink CoMP
ActiveCN109088659AReduced probability of outageImprove throughputSite diversitySpatial transmit diversityMulti user interferenceSignal quality
The invention discloses a symbol-level precoding method in a multi-user downlink CoMP, which adopts an MPSK modulation mode. According to the signal coefficients and target transmission information between the base station and the user, the antennas of the two base stations are designed to transmit precoding vector to control the interference between users and between users to serve multiple users. For the received useful signal, the equivalent signal-to-noise ratio (SNR) of the received signal is obtained by using the effective signal measurement scale and is used as the signal quality measurement index of the received signal. The precoding vectors of antennas for two base stations are obtained by solving the problem of maximizing the minimum equivalent signal-to-noise ratio (MESNR). Theuser exclusion strategy is used to find the optimal precoding vectors for antennas and compare them with the threshold of SNR to determine the precoding scheme. The symbol-level precoding scheme of the invention considers the concrete sending symbols, utilizes the constructiveness of the multi-user interference, converts the traditionally considered harmful interference into a beneficial factor, reduces the interruption probability of the receiving end, and improves the throughput of the system.
Owner:XI AN JIAOTONG UNIV
Intelligent replenishment method, system and device based on end-to-end learning, and storage medium
InactiveCN110348635AFit closelyImprove algorithm efficiencyForecastingLogisticsMathematical modelData mining
The invention discloses an intelligent replenishment method based on end-to-end learning. The method comprises the following steps: S1, acquiring data required by a mathematical model; S2, generatingsales features related to the sales volume according to the obtained data; S3, taking the characteristics predicted by the sales volume as original input values; establishing a mathematical model according to the total operation cost; the total operation cost being used as a loss function; solving and directly outputting suggest replenishment amount. Different from reduction of manual preprocessing and follow-up processing, direct output from original input to final output and direct output of results after replenishment by taking sales prediction features as original input values, end-to-endalgorithm learning is realized, so that the algorithm efficiency is improved, and the optimization space is expanded. The invention further provides a storage medium. The invention further provides anintelligent replenishment system. The invention further provides an intelligent replenishment device.
Owner:创新奇智(成都)科技有限公司
Novel waveguide polarizer
ActiveCN106025451ASimple structureEasy to manufactureWaveguide type devicesPolarizerMechanical engineering
The invention discloses a novel waveguide polarizer, which comprises a square waveguide (1), a metal partition plate (2) and two waveguide gradient parts (6 and 7), wherein the metal partition plate (2) comprises a receiving unit (3), a transmission unit (4) and a radiation unit (5) which are sequentially connected; the width of the metal partition plate (2) is equal to the length of the inner side of the square waveguide (1); the metal partition plate (2) is arranged at the axisymmetric position of the square waveguide (1); one end of the metal partition plate (2) is in contact with a square public port at one end of the square waveguide (1) and divides the square public port into two rectangular ports; the two waveguide gradient parts (6 and 7) are connected with the two rectangular ports respectively; two orthogonal wave beams received by the square waveguide (1) are converted by the metal partition plate (2); and a left-handed or right-handed circularly polarized signal is achieved by a phase difference generated between the received and converted wave beams. By the novel waveguide polarizer, good properties of the return loss, the insertion loss and the phase difference can be obtained.
Owner:NANJING UNIV OF POSTS & TELECOMM
Device and testing method for testing fast response characteristics of gas sensor
InactiveCN104316654AImprove controllabilityReduce disturbanceMaterial analysisEngineeringResponse characteristics
The invention discloses a device for testing fast response characteristics of a gas sensor. The device comprises a ventilating chamber, a valve in the ventilating chamber and a motor on the outer side of the ventilating chamber, wherein a power output shaft of the motor runs through a first wall of the ventilating chamber and is fixedly connected to the middle of the valve; the valve is attached with the second wall of the ventilating chamber, and the first wall and the second wall are opposite; a gas outlet is formed on the second wall of the ventilating chamber; gas inlet holes are formed on the wall of the ventilating chamber; the valve is driven to rotate by the motor; and the gas outlet can be completely covered by the valve. The device disclosed by the invention realizes continuous and rapid switching on the basis of chopping characteristics, thus testing the fast response characteristics of the gas sensor. Furthermore, the invention discloses a testing method of the device, and through the method, characteristic tests on sub-second and even millisecond grades of the gas sensor are realized.
Owner:SOUTHEAST UNIV
Light-emitting diode
ActiveCN104319322AEfficiently modulated polarization fieldReduce tiltSemiconductor devicesParticle physicsMaterials science
The invention discloses a light-emitting diode which at least comprises an N type layer, a light-emitting layer and a P type layer. The light-emitting layer is of a multi-quantum-well periodic structure and comprises a base layer, a first transition layer, a well layer and a second transition layer, wherein at least two thickness-uneven AlN thin layers are inserted among the base layer, the first transition layer and the second transition layer. The overlapping structure formed by the AlN thin layers, the base layer, the first transition layer and the second transition layer is adopted, and therefore the depolarization field of quantum well regions can be effectively modularized, the polarization charges between the well layer and the base layer are reduced, the energy band inclination is weakened, and the radiative recombination efficiency of carriers in the quantum well regions is improved.
Owner:QUANZHOU SANAN SEMICON TECH CO LTD
Multi-cell cooperative transmission scheme based on interference utilization
ActiveCN109889238AImprove signal qualityReduce the average symbol error rateSite diversitySpatial transmit diversityCell basedMeasurement scales
The invention discloses a multi-cell cooperative transmission scheme based on interference utilization, and the scheme comprises the steps: configuring M antennas in a base station of each cell, enabling the number of users served in each base station to be K, and configuring single antennas for the served users; the two adjacent base stations send information to all the service users in the two cells at the same time; secondly, respectively calculating measurement scales of interference signals which are received by users in a cell and are transmitted by a base station in the cell and are leaked to users served by an adjacent cell by the base station in the cell by adopting a symbol-level pre-coding mode; designing a precoding vector of the base station to maximize the sum of a minimum measurement scale of a service user receiving signal and a minimum measurement scale of a leakage signal in a cell of the base station; and respectively solving the optimal precoding vectors of two adjacent cell base stations by adopting a distributed processing method, and determining a precoding scheme. The signal quality of the signal received by the overall receiving end is improved, the averagesymbol error rate of the receiving end is reduced, and the throughput of the system is improved.
Owner:XI AN JIAOTONG UNIV
Wing high-lift device and wing high-lift method
ActiveCN112572773AHigh utilization rate of vibration energySolve the problem of air sourceDrag reductionAir-flow influencersJet flowEngineering
The invention discloses a wing high-lift device and a wing high-lift method. The wing high-lift device comprises a wing upper surface, a wing lower surface, a wing rear edge and a wing high-lift structure, wherein the wing high-lift structure comprises a first jet cavity and a second jet cavity arranged between the wing upper surface and the wing lower surface, the isolation plate is arranged between the first jet flow cavity and the second jet flow cavity; the wing lift augmentation structure further comprises a first jet flow opening and a second jet flow opening which are formed in the rearedge of the wing, the first jet flow opening communicates with the first jet flow cavity, the second jet flow opening communicates with the second jet flow cavity, the first jet flow cavity is located between the upper surface of the wing and the isolation plate, and the second jet flow cavity is located between the lower surface of the wing and the isolation plate; and therefore, the structure of the synthetic double-jet exciter is formed. Based on the double effects of the Coanda effect and the virtual trailing edge flap generated by the synthetic double-jet technology, the traditional circular rector lift augmentation technology and the virtual trailing edge flap effect are combined, the purpose of lift augmentation is achieved, and the lift augmentation efficiency of the traditional circular rector lift augmentation technology is improved.
Owner:NAT UNIV OF DEFENSE TECH
Real-time flight control navigation system and method based on ZYNQ processor
ActiveCN109373996AShorten calculation latencyLarge room for optimizationNavigation by speed/acceleration measurementsSatellite radio beaconingReal time navigationRadar
The invention discloses a real-time flight control navigation system based on a ZYNQ processor. The system comprises a real-time navigation core module, a GPS receiver, an inertial navigation combination, a display unit and a radar sensor, wherein the GPS receiver is connected to the real-time navigation core module through an RS232 bus, the inertial navigation combination is connected to the real-time navigation core module through an RS422 bus, the display unit is connected to the real-time navigation core module through a VGA wire, and the radar sensor is connected to the real-time navigation core module through an RS485 bus. The system gives a full play to advantages of a heterogeneous multi-core processor to the maximum extent, so that the computing delay time is shortened, the optimized space of the system is expanded, and the form is flexible, and the integration degree of the system is improved.
Owner:BEIJING INST OF REMOTE SENSING EQUIP
High-elongation imidazolium salt doped conductive elastomer and preparation method thereof
The invention relates to a high-elongation imidazolium salt doped conductive elastomer and a preparation method thereof. The defects that a traditional flexible conductive material is complex in preparation process and high in cost, the conductive filler is prone to agglomeration, and the conductivity of the material is sharply reduced under the large deformation condition are overcome. Specifically, the invention relates to a process for preparing a conductive elastomer by doping imidazolium salt (hydrogen bond acceptor) into carboxyl-containing polyacrylate (hydrogen bond donor), and the obtained elastomer has the advantages of high elongation, good conductivity, thermal stability, high voltage stability and the like. By changing the carboxyl content and the imidazolium salt doping amount of the polymer matrix, the mechanical property and the conductivity of the polymer matrix can be regulated and controlled. According to the invention, a conductive elastomer system is enriched, anda new idea is provided for preparation of more ionic conductive elastomer materials with high elongation and good conductivity.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Coarse-grained dynamic reconfigurable processor and data processing method thereof
ActiveCN112732639ASmall scaleShorten the timeEnergy efficient computingArchitecture with single central processing unitComputer architectureAddress generator
The invention relates to a coarse-grained dynamic reconfigurable processor and a data processing method thereof. The coarse-grained dynamic reconfigurable processor comprises a control unit for analyzing configuration information, a reconfigurable control unit used for receiving the configuration information analyzed by the control unit; an on-chip storage pool composed of a plurality of on-chip storage blocks; a conflict-free address generator used for generating memory access addresses of the on-chip storage blocks; a direct storage access module; and a data distribution module located between the direct storage access module and a storage pool. Through two-stage configuration, configuration information prefetching, second-stage partial configuration and the like, quick dynamic switching between the next operator and the current operator can be realized; meanwhile, by means of a reconfigurable computing array, a conflict-free address generator and the like which are optimally designed, high-performance and high-energy-efficiency operator implementation can be achieved.
Owner:NANJING UNIV
Power grid flexible controller topology shared by modules
ActiveCN112072639ASmall currentImprove transmission efficiencyAc-dc conversionElectric power transfer ac networkFull bridgeControl engineering
Owner:SOUTHEAST UNIV
Alloy grade recognition method based on membership degree function
ActiveCN105928962AMatching degree reflectsLarge room for optimizationMaterial analysis by measuring secondary emissionPattern recognitionAlloy
The invention discloses an alloy grade recognition method based on a membership degree function. The method comprises the following steps: reading element content information; determining a matching element set; calculating a membership degree; sorting according to a comprehensive membership degree and displaying the result; comparing the actually-measured element content information of a detection object with element content range information of a plurality of grades in a grade library; and inferring relative information including the grade of the detection object and the like. The invention provides a concept of the matching element set; the membership degree function is introduced and is used for comprehensively analyzing a plurality of factors; and matching details of the plurality of grades are shown in a direct manner.
Owner:台州高视通智能科技有限公司
Vibrating screen surface dynamic load optimization method
ActiveCN113283114AImprove screening efficiencyLow screen dynamic loadGeometric CADDesign optimisation/simulationLoad optimizationSimulation
The invention discloses a vibrating screen surface dynamic load optimization method, which comprises the following steps of: 1, selecting a design variable, and establishing an experimental matrix; 2, carrying out a response curved surface experiment; step 3, establishing two double-objective optimization models and solving the two double-objective optimization models; obtaining two groups of Pareto solution sets, wherein the solution sets respectively represent the screening efficiency optimization path of the vibrating screen under the conditions of high screen surface dynamic load and low screen surface dynamic load; and 4, calculating the screen surface dynamic load optimization space under the high screening efficiency. The screen surface dynamic load can be directly reduced, the overall structural load of the screening machine is indirectly reduced, and the service life of the screen surface and the whole vibrating screen is prolonged.
Owner:WUHAN UNIV OF SCI & TECH
Nitride-based light emitting diode
ActiveCN104300051AWeaken the polarization fieldEasy injectionSemiconductor devicesQuantum efficiencyQuantum well
The invention discloses a nitride-based light emitting diode. The nitride-based light emitting diode sequentially comprises a substrate, a buffer layer, an N type nitride layer, an (InxGa1-xN / GaN)nMQW light emitting layer and a P type nitride layer. At least one gradual change InN layer is inserted into an InxGa1-xN well layer of an MQW structure. The polarization field of the quantum well can be effectively weakened through insertion of the gradual change InN layer into the well layer, an energy band of the quantum well becomes smooth from inclination, accordingly, injection and diffusion of carriers in the well layer are enhanced, the composite probability of electrons and cavities is increased, the internal quantum efficiency is improved, and finally, the light emitting efficiency of the light emitting diode is improved, the efficiencydroop effect is reduced, and the spectrum half width, wavelength control and wavelength stability of an LED cannot be affected.
Owner:TIANJIN SANAN OPTOELECTRONICS
Soft tissue elasticity and viscoelasticity characterization method and device based on ultrasound elastography
ActiveCN108986909BImprove characterization accuracyImprove robustnessMedical automated diagnosisAcousticsArtificial neuronal network
The invention discloses a soft tissue elasticity and viscoelasticity characterization method and device based on ultrasonic elastography, wherein the method includes: simulating ultrasonic elastography by finite element method to obtain training data of artificial neural network; Data pre-processing, so that the training data contains effective information that meets preset conditions, and obtain a pre-processed feature map; train the pre-processed feature map to obtain a representation that satisfies the preset neural network effect Neural Networks of Soft Tissue Elasticity and Viscoelasticity. This method has the advantages of high characterization accuracy, good robust performance, and large optimization space, and has good application prospects and room for improvement.
Owner:TSINGHUA UNIV
Solar cell, back electrode thereof and preparation method
PendingCN112635588AImprove collection effectImprove conversion efficiencyFinal product manufacturePhotovoltaic energy generationSilver electrodeElectrical battery
The invention discloses a solar cell, a back electrode thereof and a preparation method and belongs to the technical field of solar cells. The back electrode comprises aluminum main grids, aluminum auxiliary grids and back silver electrodes; each aluminum main grid is composed of annular aluminum main grids distributed at intervals and straight-through type aluminum main grids connected with the adjacent annular aluminum main grids; the back silver electrodes are located in the annular aluminum main grids and electrically connected with the annular aluminum main grids; and each straight-through type aluminum main grid is composed of a central area straight-through aluminum main grid and a peripheral area straight-through aluminum main grid located above the central area straight-through aluminum main grid. According to the solar cell, back electrode thereof and the preparation method of the invention, through the back electrode pattern design and the step-by-step printing process, the carrier collection effect of the back electrode can be greatly improved under the condition that the back shading area and the slurry consumption are not negatively influenced, so that the efficiency conversion efficiency of a battery piece is improved.
Owner:TONGWEI SOLAR ENERGY (CHENGDU) CO LID +4
Design method and device of runners of pump turbine
ActiveCN110318929AThe number of optimization variables is smallLarge room for optimizationPump componentsFinal product manufactureThree dimensional modelControl parameters
The invention discloses a design method and device of runners of a pump turbine. The method comprises the following steps of determining basic parameters and control parameters of runners; according to the basic parameters and the control parameters of the runners, establishing three-dimensional models of the multiple initial runners; obtaining the runner performance of the multiple initial runners; optimizing the runner performance of the multiple runners to obtain the multiple optimized runners; and screening and determining the runners of the pump turbine. The invention further discloses adevice of the runners of the pump turbine. According to the design method and the device, the pump turbine runners which have good comprehensive performance in the cavitation performance, the water pump working condition and the water turbine working condition can be quickly designed.
Owner:STATE GRID CORP OF CHINA +2
PTS peak-to-average ratio suppression method based on space optimization and data processing system
ActiveCN112968855AFast convergenceReduce complexityMulti-frequency code systemsData processing systemTime domain
The invention relates to a PTS peak-to-average ratio suppression method based on space optimization, belongs to the technical field of wireless communication power amplifier efficiency optimization, and solves the problem that peak-to-average ratio suppression and complexity reduction cannot be considered at the same time in the prior art. The method comprises the following steps: performing frequency domain conversion on an input M-QAM signal to generate an OFDM frequency domain signal, and performing signal segmentation on the OFDM frequency domain signal; sequentially inputting each divided OFDM frequency domain sub-signal into a preset frequency domain scrambling model to obtain a plurality of PTS multiplicative scrambled frequency domain discrete signals corresponding to the OFDM frequency domain signal; respectively inputting the frequency domain discrete signals after each PTS multiplicative scrambling into a preset Spacing evaluation model to obtain corresponding signal dispersion estimated values, arranging the estimated values from small to large, and identifying the frequency domain discrete signals corresponding to the first m estimated values; and respectively carrying out time domain PAPR evaluation on each frequency domain discrete signal obtained by identification, and obtaining a time domain transmission signal after final peak-to-average power ratio suppression based on the frequency domain discrete signal corresponding to the minimum evaluation result.
Owner:COMMUNICATION UNIVERSITY OF CHINA
A New Waveguide Circular Polarizer
ActiveCN106025451BSimple structureEasy to manufactureWaveguide type devicesPhase differenceReturn loss
The invention discloses a novel waveguide polarizer, which comprises a square waveguide (1), a metal partition plate (2) and two waveguide gradient parts (6 and 7), wherein the metal partition plate (2) comprises a receiving unit (3), a transmission unit (4) and a radiation unit (5) which are sequentially connected; the width of the metal partition plate (2) is equal to the length of the inner side of the square waveguide (1); the metal partition plate (2) is arranged at the axisymmetric position of the square waveguide (1); one end of the metal partition plate (2) is in contact with a square public port at one end of the square waveguide (1) and divides the square public port into two rectangular ports; the two waveguide gradient parts (6 and 7) are connected with the two rectangular ports respectively; two orthogonal wave beams received by the square waveguide (1) are converted by the metal partition plate (2); and a left-handed or right-handed circularly polarized signal is achieved by a phase difference generated between the received and converted wave beams. By the novel waveguide polarizer, good properties of the return loss, the insertion loss and the phase difference can be obtained.
Owner:NANJING UNIV OF POSTS & TELECOMM
Service function chain orchestration method for operation-level function parallel and adaptive resource allocation
ActiveCN114124713ARelax constraintsReduce total delay lossTransmissionVirtualizationResource assignment
The invention provides a service function chain arrangement method for operation-level function parallelization and adaptive resource allocation, which relates to the technical field of communication and comprises the following steps: acquiring a service function chain SFC topology of a target source server node in a virtualized network to be optimized; performing function-level parallel processing and operation-level parallel processing on network functions in the SFC topology based on a preset virtual network function parallelism relation table to obtain a recombined SFC topology; and determining a corresponding resource allocation strategy for the target source server node based on the recombined SFC topology and a preset adaptive resource allocation algorithm. According to the method, from the perspective of the SFC, the network functions in the SFC topology are subjected to function-level parallelism and operation-level parallelism according to the preset virtual network function parallelism relation table, and compared with the traditional serial SFC topology, the recombined SFC topology can effectively reduce the total delay loss and improve the throughput.
Owner:BEIHANG UNIV
Multi-network trunk transportation optimization method, computer equipment and storage medium
ActiveCN113379102ABreak through limitationsReduce wasteInternal combustion piston enginesForecastingComputer scienceBus
The invention discloses a multi-network trunk transportation optimization method, computer equipment and a storage medium. The method comprises the following steps: acquiring transportation information; establishing a linear programming model according to the transportation information, wherein the target of the linear programming model is the minimum transportation cost and time efficiency, and the constraint condition of the model includes that for a single network, distribution rooms of different goods collection routing areas cannot collect goods; for multiple networks, enabling non-same joint transportation routing intervals not to perform joint transportation; enabling the same goods collection routing area not to allocate goods collection to the low-grade goods collection when the grade is high; performing joint transportation only when a regular bus is driven; only taking one route from all originating places to destinations; sending out all the original goods quantity and the goods collection quantity, and balancing the distribution goods quantity flow; enabling the cargo capacity of each regular bus not to exceed the maximum loading capacity of the regular bus; enabling the loading and carrying quantity on the regular bus line segment to be consistent with the sum of all the target circulation quantities of the line segment; and solving the linear programming model to obtain a transportation optimization scheme.
Owner:ZHEJIANG BAISHI TECH
Two-dimensional permanent magnet array type magnetic suspension gravity compensator
ActiveCN110880888AVarious formsLarge room for optimizationMagnetic holding devicesCondensed matter physicsMaterials science
The invention discloses a two-dimensional permanent magnet array type magnetic levitation gravity compensator, belongs to the technical field of magnetic levitation, and aims to solve the problems oflarge parasitic force and complex system structure caused by gravity unloading of large-scale load non-contact support in a suspension mode or an air floatation mode. The compensator comprises a stator and a rotor. The stator comprises an upper-layer stator and a lower-layer stator. The rotor is arranged between the upper-layer stator and the lower-layer stator which are parallel to each other andare fixedly connected, and a vertical air gap exists between the two layers of stators and the rotor. The two layers of stators and rotors are of a two-dimensional array flat plate structure composedof N * N rectangular permanent magnets, and a gap exists between any two adjacent permanent magnets in each layer of flat plate structure. The magnetizing directions of the permanent magnets are vertical, and the magnetizing directions of any two adjacent permanent magnets in each layer of flat plate structure are opposite. The magnetizing directions of the permanent magnets at the opposite positions of the upper-layer stator and the lower-layer stator are opposite. The magnetizing directions of the permanent magnets at the opposite positions of the rotor and the upper-layer stator are the same.
Owner:HARBIN INST OF TECH
Signal lamp coordination method, computingequipment and storage medium
PendingCN112017452ALarge room for optimizationImprove optimization effectRoad vehicles traffic controlEngineeringTraffic efficiency
The invention discloses a signal lamp coordination method, computing equipment and a storage medium, which relate to the technical field of traffic control, and mainly aim to optimize a configurationscheme of the signal lamps at an intersection by coordinating phase sorting in the intersection so as to improve the traffic efficiency of vehicles in a target path. According to the main technical scheme of the invention, the method comprises the steps ofdetermining the phases of a plurality of intersections in a target path for at least one target path,configuring a first duration capable of continuously passing through the plurality of intersections in the target path based on the phase sequence corresponding to the plurality of intersections,and determining a configuration scheme of each signal lamp in the target path according to the phase sequence corresponding to the first duration.
Owner:ALIBABA GRP HLDG LTD
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