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963results about How to "Solve instability" patented technology
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Intelligent vehicle trajectory planning and tracking combined control method
ActiveCN111258323AImprove handling stabilityImprove driving performanceAutonomous decision making processTarget-seeking controlVehicle dynamicsSimulation
The invention provides an intelligent vehicle trajectory planning and tracking combined control method. The method comprises the following steps: parameterizing a road; establishing a transverse and longitudinal vehicle dynamic model; expanding a vehicle model, and forming a prediction model through linearization, discretization and incremental conversion; designing an objective function of a trajectory planning and tracking joint control problem according to a model prediction control method; obtaining a current vehicle state, and updating matrix parameters in the prediction model; establishing road boundary, driving stability and state quantity constraints according to the vehicle state and the predicted output state of the previous moment; and converting the problem into a quadratic programming problem form, solving an optimal control increment combination, and acting the optimal front wheel rotation angle [delta]* and the longitudinal control value D* on the autonomous vehicle. According to the invention, the combined processing of optimal driving line planning and control is realized, the complexity of an automatic driving module is reduced, the overall memory occupation and processing time are reduced, and the control stability of the automatic driving racing car is improved.
Owner:SOUTH CHINA UNIV OF TECH
Self-adaptive electromagnetic relay zero-crossing on and off control method
The invention discloses a self-adaptive electromagnetic relay zero-crossing on and off control method, which is characterized by adapting to different on and off leads of a relay automatically regardless of harmonic waves of a voltage and vibration of the relay so as to switch on and off zero crossing. The method uses a micro controller, an alternating current power supply zero-crossing detection circuit, a relay contact end voltage tester, a load current zero-passing detector, an electromagnetic relay, a relay stabilized voltage power supply and an on and off control signal. The alternating current power supply zero-crossing detection circuit is used for voltage zero-crossing detection; the relay contact end voltage tester is used for testing the voltages at the two ends of a contact; the load current zero-passing detector is used for current zero-crossing detection; the relay stabilized voltage power supply is used for supplying power to the relay; the relay control contact is connected with a load; the on and off control signal is used for receiving an on and off command; and the controller collects all input signals, stores and computes the signals and controls the relay.
Owner:BEIHAI SHENLAN SCI & TECH DEV
Short-term electric load prediction method based on improved genetic algorithm for optimizing extreme learning machine
ActiveCN108876054AOvercome precocitySolve instabilityForecastingBiomolecular computersLoad forecastingOptimal weight
The invention discloses a short-term electric load prediction method based on improved genetic algorithm for optimizing extreme learning machine. A hill climbing method is used to perform preferentialselection again in the progeny population, an initial individual is selected, another individual in a close area is select, their fitness values are compared, and one individual which has good fitness values is leaved. If the initial individual is replaced or a better individual cannot be found in several iterations, iteration is stopped, the search direction of the genetic algorithm through thehill climbing method is optimized, obtaining an optimal weight value and a threshold value, a network optimization prediction model are obtained, a network optimization prediction model is obtained, the network optimization prediction model and prediction results of BP network and the extreme learning machine are comparative analyzed, including selection of input and output of the prediction network model, algorithm of improved genetic algorithm for optimizing extreme learning machine, and analysis of prediction results. The short-term electric load prediction method based on improved geneticalgorithm for optimizing extreme learning machine has faster training speed and more accurate prediction results, and is suitable for modern short-term electric load prediction with plenty of influence factors and huge data volume.
Owner:STATE GRID HENAN ELECTRIC POWER COMPANY ZHENGZHOU POWER SUPPLY +2
Three-dimensional measurement method for triple-frequency color fringe projection
ActiveCN102322822AAchieve distortion-free color decouplingSolve instabilityUsing optical meansComputer generationTest object
Owner:XIAN CHISHINE OPTOELECTRONICS TECH CO LTD
Battery charging apparatus as well as control method thereof
ActiveCN101282045ASolve instabilityBatteries circuit arrangementsSecondary cells charging/dischargingGeneral purposeCharge current
The invention is suitable for power supply field, providing a battery charging device and control method thereof, which comprises a charging circuit having a charging current setting end for charging battery based on charging current of the charging current setting end; a charging current control circuit which is connected with the charging current setting end for gradually adjusting the charging current based on equivalent resistance value of the charging current control circuit; a general purpose register circuit which is connected with the charging current control circuit for controlling the equivalent resistance value by setting value of the general purpose register. The invention integrates a plurality of switch pipes and resistances in the charging current control circuit by setting the value of the general purpose register to control on and off of the switch pipes, thereby gradually adjusting current chanrging current to make the voltage of the charging power supply smoothly rise and decline and settle the problom that the whole equipment is not stable caused by the voltage fluctuation in the cource of adjusting the charging current in prior art.
Owner:ACTIONS ZHUHAI TECH CO
Alprostadil freeze-dried emulsion and its prepn. method
ActiveCN1903206ASolve instabilityImprove stabilityPowder deliveryOrganic active ingredientsFreeze-dryingOil phase
A freeze-dried emulsion of prostaglandin El contains proportionally prostaglandin El, the oil for injection, emulsifier, stabilizer, and freeze-drying protector. Its preparing process is also disclosed.
Owner:上海万特医药科技(集团)有限公司
Thermal power system with complementation between solar energy and biomass energy
InactiveCN102967080AEnergy saving and environmental protection use energy modeSolve instabilitySolar heating energySpace heating and ventilationThermal energySolar light
The invention provides a thermal power system with complementation between solar energy and biomass energy. The thermal power system comprises a solar light condensing device, a solar heat storage kettle, a biomass heat power station, a combined refrigerating and icing device for intensive cooling, and a hot water system for intensive heating, wherein the solar light condensing device is connected with the solar heat storage kettle through a pipeline, the inlet of a first output heat exchanger B1 of the solar heat storage kettle is connected with the outlet of a water supply pump of a biomass boiler, and the outlet of the B1 is connected with the inlet of a water supply system of the biomass boiler; an inlet pipeline of a second output heat exchanger B2 of the solar heat storage kettle is connected with an output pipeline of a water purification plant, and the outlet of the B2 is connected with a heat input pipeline of the combined refrigerating and icing device; the heat input pipeline can supply heat for refrigerating and icing; and work cooling water of the combined refrigerating and icing device is connected to a hot water kettle of the heat supply system to intensively supply heat to users. The solar heat storage kettle is a two-medium or three-medium double-circulation heat storage kettle, and the heat storage medium is heat transfer oil and fused salt.
Owner:ZHONGYING CHANGJIANG INTERNATIONAL NEW ENERGY INVESTMENT CO LTD
Rotation switching method and device of multiple optical filters of imaging sensor
InactiveCN101806947AReasonable design structureSmall and flexibleUsing optical meansMountingsOpto electronicImage sensor
The invention relates to rotation switching method and device of multiple optical filters of an imaging sensor. The device comprises a machine body, a rotation switching mechanism of optical filters, a photoelectric position sensor, a transmission mechanism, multiple optical filters fixed on the rotation switching mechanism of the optical filters and position notches arranged at the edges of the optical filters, wherein a light sensing window is arranged on the machine body, the rotation switching mechanism of the optical filters is arranged on the machine body, the optical filters fixed on the rotation switching mechanism of the optical filters correspond to the light sensing window, and the photoelectric position sensor corresponds to the position notches. The transmission mechanism drives the rotation switching mechanism of the optical filters to rotate, and the optical filters fixed on the rotation switching mechanism of the optical filters are rotated onto the light sensing window.
Owner:谭懋
Solar photovoltaic parallel inverter control system based on LCL filtering
InactiveCN101494385AHigh technology contentEmission reductionSingle network parallel feeding arrangementsPhotovoltaic energy generationFiltrationSimulated annealing
A solar energy grid-connected inverter control system based on LCL filtration comprises a photovoltaic array, an electromagnetic interference filter, namely an EMI filter, a power module, an LCL filter, an isolation transformator TB1, a sample circuit, a filter circuit and a controller which includes a maximum capacity tracking MPPT unit. MPPT adopts an intelligent algorithm based on a hybrid algorithm of a simulated annealing method and a genetic algorithm. The hybrid optimization algorithm takes the operation process of the genetic algorithm as the main process and also combines a simulated annealing mechanism that is used for further adjusting optimized instruction data. The control system has the advantages of good stability, strong performance and high efficiency and reliability.
Owner:CHANGZHOU RUSN NEW ENERGY
Wrist watch type multi-parameter biosensor
InactiveCN104042191AEfficient extractionEasy extractionDiagnostic recording/measuringSensorsWaveform analysisDecomposition
The invention discloses a wrist watch type multi-parameter biosensor and relates to a self-adaptive detection method for physiological parameters and a multi-parameter intelligent monitoring wrist watch by the adoption of the method. The method comprises the steps that (1) human physiological parameter signals are collected; (2) the human physiological parameter signals are subjected to self-adaptive wavelet decomposition, and feature predictors and updaters are selected point by point in the decomposition process; (3) waveform analysis is conducted, interference signals in the decomposed signals are eliminated, and human physiological parameter signals without interference are obtained. The monitoring wrist watch comprises a base body, wherein the base body is provided with a central processing unit, a physiological parameter sensor used for collecting the human physiological parameter signals and various other sensors. The central processing unit processes data by the adoption of a self-adaptive wavelet decomposition method to obtain the human physiological parameter signals without interference. The wrist watch type multi-parameter biosensor effectively solves the problem of instability caused by large contact resistance generated when a daily wearing mode is adopted. The wrist watch type multi-parameter biosensor is convenient to use and can collect various human physiological signals, movement signals, environment signals and the like in real time.
Owner:BEIJING HUIREN KANGNING TECH DEV
Fully mechanized top coal roof multiple segment control exploration method for deeply inclined coal seam
InactiveCN101169039AIncrease the lengthIncrease release rateUnderground miningSurface miningMining engineeringCoal pillar
The invention provides a head-plate multi-section control mining method for the high inclination-angle coal seam comprehensive top-coal caving. The method is characterized in that two or more sections / working faces are arranged on the same stage of the coal seam, protective or isolating coal pillars are arranged between the sections / working faces; the upper sections / working faces on the same stage is mined firstly when mining the single coal seam; the upper layer of coal is mined firstly when mining the coal seam group; the upper sections / working faces on the same stage of a same coal seam is mined first, and the top-coal is not caved or is caved in control during the mining process; the normal top-coal caving stopping procedure begins mining from the second or lower section / working face; in the course of mining the second or lower section / working face, the protective or isolating pillars on the section / working face of the recovery part can ensure that the gangue slips or rolls into the space formed after the top-coal on the middle or upper areas of the section / working face is caved. The method can improve the top-coal recovering rate of the high inclination-angle coal seam top-coal caving and the output of the working face, and can ensure safe production.
Owner:XIAN UNIV OF SCI & TECH
Method for identifying practical parameters of synchronous generator on basis of load rejection test and numerical difference
ActiveCN102510263ASolve instabilityAvoid interferenceElectronic commutation motor controlVector control systemsSteep descentTransient state
The invention relates to a method for identifying practical parameters of a synchronous generator on basis of a load rejection test and a numerical difference. The method comprises the following steps: utilizing a conventional method to confirm steady parameters of a generator; taking an exciting voltage after the load rejection test is performed as an input volume; taking a difference between a theoretical value of a machine-end voltage and a practically measured value under an evaluating system as a target function; and utilizing an iterative solution method for an extreme value of the target function based on a steepest descent method to realize the identification for the parameters of the generator, wherein a numerical difference method is used for obtaining the gradient of the target function during an iterative process and a difference value of adjacent twice target functions and the gradient of the target function are taken as control conditions for ending the iteration. The load rejection test, on which the identification is based, is easily realized; a high enough induction current can be generated in a damping winding after the load rejection test is performed; the machine-end voltage is obviously changed during the temporary state process and the sub-temporary state process; the interference of environmental noise to the identification for a time domain is efficiently overcome; and the problem of unsteady indentifying result is solved.
Owner:CHINA ELECTRIC POWER RES INST +1
Stator structure and rotating electrical machine using the same
InactiveUS20100237726A1Eliminate fearEasy to fixMagnetic circuit rotating partsMagnetic circuit stationary partsMagnetic reluctanceInstability
The invention provides a rotating electrical machine provided with stable rotation characteristics for enabling each core to be reliably fixed in arranging a plurality of cores annularly around the rotor even when the dimensional error occurs in manufacturing accuracy of each core, causing each division core itself to enhance the cooling property, and resolving instability of magnetic reluctance between division cores, where the rotating electrical machine has a plurality of stator cores obtained by laminating electromagnetic steel plates, winding coils wound around the stator cores via insulators, a pair of first and second bracket members that hold the plurality of stator cores from the front and back in the rotary shaft direction of the magnet rotor, and a fastening member that couples the first and second bracket members, in the first bracket member is formed a first contact surface for striking one end face of each of the stator cores to regulate so as to arrange the plurality of stator cores annularly, in the second bracket is formed a second contact surface for striking the other end faces of the stator cores to regulate, the first contact surface constitutes a reference plane to align one end faces of the plurality of stator cores on the same plane, the second contact surface is formed of a deformation surface deformable to follow the other end faces of the plurality of stator cores, and at least one of the pair of first and second brackets is formed of a ring-shaped magnetic material for magnetically coupling between the division cores.
Owner:NISCA KK
Time-frequency transform based method for identifying parameters of synchronous generator
ActiveCN103618492AImprove stabilityAvoid interferenceElectronic commutation motor controlVector control systemsTime domainState variable
The invention provides a time-frequency transform based method for identifying parameters of a synchronous generator. The method includes steps of S1. carrying out Laplace transform on a differential equation of a d axle and a q axle of a generator in time domain in a generator model to obtain an equation of the d axle and the q axle of the generator in frequency domain, and carrying out inverse Laplace transform to obtain an integral equation of the d axle and the q axle of the generator in the time domain; S. replacing state variable of the integral equation of the d axle and the q axle of the generator in the time domain; S3. dispersing the integral equation of the d axle and the q axle of the generator in the time domain into that measurable column vectors or integration of the measurable column vectors are equal to a matrix multiplying by column vectors of coefficients of the integration equation, and solving to obtain the column vectors of the coefficients of the integration equation; and S4. solving to obtain parameters of the generator model according to the relation between the column vectors of the coefficients of the integration equation and parameters of the generator. A differential equation of a generator is converted to an integration equation according to the time-frequency transform based method for identifying the parameters of the synchronous generator, stability of calculating a value is facilitated, and the problem of an unstable identification result is solved.
Owner:STATE GRID CORP OF CHINA +2
Imaging device based on vein pattern and backside pattern of finger and multimode identity authentication method
ActiveCN101539995AImprove stabilityImprove applicabilityCharacter and pattern recognitionVeinBiometrics
The invention discloses an imaging device based on vein pattern and backside pattern of a finger and a multimode identity authentication method, wherein the imaging device comprises an acquisition support on which a concave finger putting area is arranged; a visible light imaging device which is arranged at one side of the concave finger putting area of the acquisition support and used for acquiring the back picture of the finger; a near infrared imaging device which is arranged at the other side of the concave finger putting area of the acquisition support and opposite to the visible light imaging device, and used for acquiring the vein picture of the finger by the irradiation of a near infrared light supply; and the bar-shaped near infrared light supply which is arranged on the acquisition support and used for irradiating near infrared light to the finger from the side of the finger. The identity authentication method comprises a logon procedure and an authentication procedure, and the adopted biological features thereof comprise the backside pattern and vein pattern of the same finger. The invention also relates to identity authentication equipment comprising the imaging device, which has better anti-counterfeit performance, and can effectively improve the stability and applicability of a biometrics identification system.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Teleoperation robot adaptive control method based on master-slave reference model
InactiveCN101930216AAchieve bilateral controlStable Feedback ForceAdaptive controlReference modelModel parameters
The invention relates to a teleoperation robot adaptive control method based on a master-slave reference model. The system of the invention is composed of a master side circuit, a slave side circuit and a communication delay link, wherein the master side circuit is composed of an operator, a main robot and a master side environmental model; the slave side circuit is composed of an environment, a slave robot, a slave side environment model, a model parameter correcting module and a delay-simulating module; the side environment model provides reference force signals, the reference force signals and the force signals fed back by the environment are input the model parameter correcting module for comparison; by utilizing the error, an adjustable gain pc(t) is output from the model parameter correcting module, passes through the communication delay link and adjusts the master side master side environmental model; the master side environmental model provides feedback force signals for the operator; and the adjustable gain pc(t) passes through the delay-simulating module, adjusts the slave side environmental model and performs continuous circulation; and the master side environmental model and the slave side environmental model continuously approximate the real environmental model and form the teleoperation which can overcome the influence of delay and ensure the system to obtain the stable control.
Owner:NANTONG ZHONGGANG COATING EQUIP +1
Control association modeling method of elastic mode of aircraft
ActiveCN107220403ASolve instabilityGood technical supportDesign optimisation/simulationSpecial data processing applicationsSystems designControl system
The invention discloses a control association modeling method of an elastic mode of an aircraft. The method comprises the following steps that a mechanism model of the elastic structure mode of the aircraft is built, and dynamic response data of the elastic mode is obtained; based on a beam element, the form of an agent model of the elastic mode is determined; coefficient setting is conducted by using a system identification method, a control association model of the elastic mode is obtained, the effectiveness of the built agent model is further verified based on the goodness of fit, the influence of the elastic mode on the open-loop performance and close-loop performance of an aircraft body is analyzed, and the association relationship between the body characteristic and the elastic mode is analyzed. Therefore, the influence rule of the elastic mode on the overall system and the design of the control system is found, and a good technical support is provided for the actual engineering design.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Multimedia file downloading method and user terminal
InactiveCN103716719ADownload to achieveImprove download speedSelective content distributionNetwork conditionsComputer terminal
The embodiment of the invention provides a multimedia file downloading method and a user terminal. By configuring N paths of downloading threads, the multi-thread multimedia file downloading is realized; and the downloading speed is increased while the problem that direct broadcast video frames are unstable when the network condition is unsatisfactory is solved. The scheme comprises obtaining the address of a multimedia file needing to be downloaded; determining that the N paths of downloading threads are used for downloading according to the size of the multimedia file needing to be downloaded, wherein N is an integer greater than or equal to 1; initiating the N paths of downloading threads and transmitting the number of the threads to a server to enable the server to divide the multimedia file needing to be downloaded into N segments, wherein the number of the threads indicates the initiation of the N paths of downloading threads; and downloading the multimedia file needing to be downloaded, which is divided into N segments, through the N paths of downloading threads.
Owner:LETV CLOUD COMPUTING CO LTD
Verifiable memory leakage prevention dynamic searchable encryption method and cloud server
ActiveCN108055122ASolve instabilityVerifiable integrityKey distribution for secure communicationEncryption apparatus with shift registers/memoriesPhysical unclonable functionKey generation
The invention belongs to the technical field of cloud computing and discloses a verifiable memory leakage prevention dynamic searchable encryption method and a cloud server. A data owner is used for establishing an index and an encryption file set, outsourcing the index and the encryption file set to the cloud server, submitting a keyword trap door search related file to the cloud server and verifying returned search results. The data owner also can be used for updating the encryption file set. The cloud server is used for storing the encryption file set and the index, carrying out searching on the index according to a trap door, returning corresponding results and evidences and updating the corresponding evidences according to the updating operation of the data owner. The invention provides the first memory information leakage prevention and verifiable dynamic searchable symmetric encryption scheme. The key security and the search result accuracy and integrity are ensured. The problemthat the key generation of physical unclonable functions is instable is solved, and a relatively reliable key generation mechanism is established.
Owner:XIDIAN UNIV
Semiconductor package and manufacturing method thereof
InactiveCN101335217AReduce cracking damageSolve instabilitySemiconductor/solid-state device detailsSolid-state devicesElectrical conductorSemiconductor chip
The invention discloses a semi-conductor packaging unit and a manufacturing method hereof, which provides a carrier plate, wherein, a plurality of metal blocks and a metallic layer for coating the metal blocks are formed on the carrier plate so as to electrically connect at least one semi-conductor to the metallic layer, and then a packaging colloid coating the semi-conductor chip is also formed on the metallic carrier plate, then, the carrier plate and the metal blocks are removed to form a plurality of grooves on the surface of the packaging colloid correspondingly. At the bottom surface and the side of the grooves are covered with a metallic layer so as to lead the conductive elements to be effectively positioned in the grooves and fully conjugated with the metallic layer.
Owner:SILICONWARE PRECISION IND CO LTD
Steel-reinforced concrete core column and manufacturing method thereof
InactiveCN101748859AImprove carrying capacitySolve instabilityStrutsPillarsSheet steelReinforced concrete
The invention relates to a construction member, in particular to a steel-reinforced concrete core column and a manufacturing method thereof. The core column comprises steel tubes, steel plates and concrete; a plurality of steel tubes are arranged in the core column, and the steel tubes are connected through the steel plates; a plurality of longitudinal ribs are arranged at the peripheries of the steel tubes, and the longitudinal ribs are bound by stirrups; the concrete is poured in the steel tubes and gaps between the steel tubes and the longitudinal ribs; and concrete protective layers are arranged outside the longitudinal ribs. The method comprises the following steps: firstly, fixing the steel tubes at the cross points of longitudinal limbs and transverse limbs of the core column and in the end parts of the limbs, and welding the steel tubes together through the steel plates; arranging the longitudinal ribs, and binding and fixing the longitudinal ribs by the stirrups; arranging templates outside the longitudinal ribs; pouring the concrete in the steel tubes, curing the concrete to reach the compressive strength of the concrete, making the core column of the steel tubes bear the load firstly, and then pouring the concrete between the outsides of the steel tubes and the templates to form the concrete protective layers outside the longitudinal ribs so as to form an overlapped column; and removing the templates. The core column has the advantages of high bearing capacity, good stability and the like.
Owner:SHENYANG JIANZHU UNIVERSITY
Ball spinning forming tooling device and reverse ball spinning forming method thereof
The object of the present invention is to provide a ball spinning forming tooling device and its reverse ball spinning forming method. The ball spinning forming tooling device includes a spinning head, a mandrel and a limit ring. The spinning head includes a threaded support tube, an outer support Ring, conical die ring, balls, threaded support tube and conical die ring are installed in the outer support ring, one end of the threaded support tube is located in the conical die ring, the balls are located in the conical die ring, and are evenly distributed around the conical surface of the conical die ring , and in contact with the threaded support pipe, the core mold includes a mandrel and a discharge ring, the discharge ring is sleeved on the mandrel, and the limit ring is sleeved on one end of the mandrel. The reverse ball spinning forming method is completed through three steps: preparation stage, spinning stage and unloading stage. The invention can manufacture high-strength, high-precision thin-walled longitudinal internal rib cylindrical parts. The radial position of the tooling ball can be precisely controlled by adjusting the threaded support tube, which greatly improves the forming accuracy.
Owner:HARBIN ENG UNIV
Real-time three-dimensional measurement method based on color sine structured light coding
ActiveCN103968782ASolve instabilityHigh 3D measurement accuracyUsing optical meansInterference factorThree dimensional measurement
The invention provides a real-time three-dimensional measurement method based on color sine structured light coding in the three-dimensional sending technology. In the method, a single color sine structured light coding pattern is projected to the surface of an object through a projector; two camera shooting devices are utilized to record distorted color structured light images respectively, all the color structured light images are subjected to color separation, and then single-color structured light images corresponding to an R channel, a G channel and a B channel are obtained; the phase positions of the two camera shooting devices are calculated according to the single-color structured light images; phase matching is conducted according to the epipolar constraint relation between the two camera shooting devices, and then instantaneous three-dimensional coordinates of the surface of the object are obtained. Through the real-time three-dimensional measurement method based on color sine structured light coding, real-time three-dimensional measurement can be achieved; the method has the advantages of being good in robustness to unbalance of color brightness, coupling of color channels, nonlinearity of the projector and other interference factors, high in measurement accuracy and the like.
Owner:SICHUAN UNIV
Improved deep belief network (DBN)-based cardiovascular disease (CVD) predicting model
InactiveCN107506590AGood predictive effectSolve instabilitySpecial data processing applicationsMachine learningReconstruction error
The invention discloses an improved deep belief network (DBN)-based cardiovascular disease (CVD) predicting model. The model is based on DBN; the feature abstract expression is carried out layer by layer by utilizing multi-layer network architecture; optimal network parameters obtained through training are used for initializing neural network; in the meantime, the network depth is autonomously determined by utilizing reconstruction errors; the improved DBN-based predicting model is constructed through combining unsupervised training and supervised tuning; and therefore, the stability is guaranteed while the accuracy of the model prediction is increased at the same time. By means of the model disclosed by the invention, the problem that the prediction accuracy of a traditional predicting model is reduced under the condition of multi-classification and non-linear complex factors is solved; and the problem that the variance of prediction results is increased due to the randomness of initial parameters of shallow neural network is also solved at the same time.
Owner:ZHENGZHOU UNIV
Direct electrochemical process of preparing ferrate
InactiveCN1740398AImprove electrolysis efficiencyReduce manufacturing costElectrolysis componentsHigh concentrationElectrolysis
The present invention belongs to the field of chemical preparing technology, and is especially direct electrochemical process of preparing ferrate. The preparation process prepares ferrate inside one diaphragm type cylindrical electrolytic bath with pure sodium hydroxide as electrolyte. While controlling electrolyte concentration, reaction temperature and applied voltage, high concentration sodium ferrate solution is first prepared, and potassium ferrate or barium ferrate is then prepared via adding potassium ion or barium ion. The present invention has simple technological process and low cost, and is suitable for large scale preparation of ferrate.
Owner:FUDAN UNIV
Solar and industrial waste heat cogeneration system
ActiveCN102080636AAvoid complexityGuaranteed complexityFrom solar energyEnergy industryCogenerationRecuperator
The invention discloses a solar and industrial waste heat cogeneration system, in particular to a Rankine cycle system for assisting industrial exhaust heat generation by utilizing a solar thermal collector. In the solar and industrial waste heat cogeneration system, a solar thermal collector, an intermediate heat exchanger and a work medium pump are sequentially connected in series to form a cycle; and the intermediate heat exchanger, an exhaust heat boiler, a steam drum of the exhaust heat boiler, a steam turbine, a power generator, a condenser, a deaerator, a water feeding pump and other equipment form the Rankine cycle generation system. A single pressure system or dual-pressure system can be adopted according to different parameters and different forms of the steam turbines, wherein in the single pressure system, the intermediate heat exchanger is used as the evaporator of the exhaust heat boiler and integrated with the exhaust heat boiler system for jointly producing superheated steam working medium; and in the dual-pressure system, the intermediate heat exchanger and a flash evaporator are used as independent equipment to be integrated with the exhaust heat boiler system. The system provided by the invention is beneficial to increasing the generated energy of generator sets for industrial exhaust heat generation, reducing the influence of the fluctuation of industrial exhaust heat to the generated energy, and simultaneously reducing the investment to simple solar thermal generation.
Owner:NANJING KESEN KENEN ENVIRONMENT & ENERGY
Indoor positioning method based on Wi-Fi, Bluetooth and PDR integrated positioning
PendingCN110320495ASolve the problem of large cumulative errorSolve instabilityNavigational calculation instrumentsPosition fixationWi-FiBluetooth
The invention discloses an indoor positioning method based on Wi-Fi, Bluetooth and PDR integrated positioning. The method comprises the steps that (1) a Wi-Fi environment is deployed in a to-be-positioned region, and a Wi-Fi offline fingerprint database is established by collecting Wi-Fi signal strength values RSSI of all sub-regions in the to-be-positioned region at an offline stage; (2) Wi-Fi signal RSSI values are collected at an online stage, and Wi-Fi positioning is realized through an improved weighted centroid localization algorithm; (3) Bluetooth equipment is deployed in the to-be-positioned region, Bluetooth RSSI values are collected, and Bluetooth positioning is realized through the improved weighted centroid localization algorithm; (4) Wi-Fi and Bluetooth integrated positioningis realized through average weighting; (5) a step model is utilized to match acceleration sensor results, and PDR positioning is performed; and (6) Wi-Fi, Bluetooth and PDR are integrated through a UKF algorithm to obtain a final positioning result. The positioning method is high in positioning precision, small in positioning error and good in effect.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Multi-energy adjustable and controllable energy supply system based on water circulation
InactiveCN106051885ASolve instabilityImprove system efficiencySolar heating energyMechanical apparatusWater source heat pumpWater source
The invention discloses a multi-energy adjustable and controllable energy supply system based on water circulation. The multi-energy adjustable and controllable energy supply system comprises a solar water heat collector, a heat accumulation water tank, a water source heat pump outdoor side heat exchanger, an air source heat pump outdoor side heat exchanger, an air heat collector, a user side heat exchanger, an indoor heat exchanger and a gas boiler. According to the multi-energy adjustable and controllable energy supply system, a solar heat collector system is coupled with a heat pump system, a water source heat pump and an air source heat pump are used in parallel, and the gas boiler is used for auxiliary heating, so that the efficiency of the system is improved, the problem that solar energy is not stable is solved, and multi-condition running is achieved; and in addition, one set of system is adopted for heating and refrigerating, so that the structure is simple, and the manufacturing cost is reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
Grouting reinforcement device and method for shallow clay
The invention relates to a grouting reinforcement device and a method for shallow clay. The device mainly comprises a sleeve valve pipe and a mold bag, wherein the sleeve valve pipe comprises a galvanized grouting inner pipe, a PVC (polyvinyl chloride) outer pipe, rubber sleeves, sealing rings and the like. The invention further discloses a use method of the device at the same time. According to the device and the method, cement and water glass are injected into the mold bag to form a pile foundation-similar structure according to the characteristics of difficult fixing and pressing of a shallow clay body, the sleeve valve pipe can be effectively fixed, a pressure-bearing foundation is provided for grouting of the sleeve valve pipe, and at the same time, the device and the method have universality according to the characteristic of the flexible grouting of the sleeve valve pipe. The device and the method have the advantages low manufacturing material cost, a simple laying method, convenience in operation and the like.
Owner:SHANDONG UNIV
Multi-resource coordination control method and apparatus for direct current block fault impact alternating current channel
ActiveCN107732951ARealize coordinated controlRich security and stability control meansElectric power transfer ac networkSingle network parallel feeding arrangementsLoad SheddingMulti resource
The invention provides a multi-resource coordination control method and apparatus for a direct current block fault impact alternating current channel. Static state stability limit of the alternating current channel is determined firstly; then the multi-resource coordination control sequence and coordination control quantity are determined; and finally, multi-resource coordination control is realized. By virtue of the technical scheme provided by the invention, multiple types of control resources of pumping, storing and pump switching, direct current power emergency modulation, accurate load shedding, and load shedding are taken into comprehensive consideration, so that control means are increased; the target function of a multi-resource coordination control model takes the minimum of the load shedding quantity as the optimization object, and constraint conditions are taken into consideration, so that control effectiveness is improved, control cost is lowered, and power grid defensive performance is improved; and in addition, by adoption of a heuristic algorithm, the multi-resource coordination control sequence and the multi-resource coordination control quantity are obtained, and the multi-resource coordination control quantity obtained by adopting the heuristic algorithm is high in interpretability, so that relatively high practicability can be realized.
Owner:CHINA ELECTRIC POWER RES INST +3
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