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Refrigerant mass and flow measuring method and device and measuring instrument
InactiveCN106524548AAvoid adverse effects from normal operationImprove experienceCompression machines with non-reversible cycleRefrigeration safety arrangementMeasuring instrumentEvaporation
The invention provides a refrigerant mass and flow measuring method and device and a measuring instrument. The method is used in a refrigerating system and comprises the steps that the evaporation pressure and the condensation pressure are obtained; the air suction temperature and the exhaust temperature of a compressor are obtained, and the compressor shell surface temperature, the environment temperature around the compressor and the compressor consumption power are obtained; the jetting temperature of an intermediate pressure container is obtained, and the oil content of a refrigerant mixture is obtained; a corresponding first enthalpy value, a corresponding second enthalpy value, a corresponding third enthalpy value, a corresponding fourth enthalpy value, a corresponding fifth enthalpy value, an enthalpy value difference and the heat exchange amount of the compressor and the outside environment are obtained through calculation according to the obtained various parameters; and according to the first enthalpy value, the second enthalpy value, the third enthalpy value, the fourth enthalpy value, the fifth enthalpy value, the enthalpy value difference, the heat exchange amount, the consumption power of the compressor and the oil content of the refrigerant mixture, the mass and flow of the refrigerant in the refrigerating system are obtained through calculation. According to the scheme, non-intrusive and high-precision measurement on the mass and flow of the refrigerant is achieved, bad influences brought to the refrigerating system in the measurement process are avoided, and the user experience is improved.
Owner:TSINGHUA UNIV
Mass and flow measuring method and device of refrigerant in refrigerating system and measuring instrument
InactiveCN106524551AAchieve non-intrusiveRealize high-precision measurementCompression machines with non-reversible cycleRefrigeration safety arrangementMeasuring instrumentEvaporation
The invention provides a mass and flow measuring method and a device of a refrigerant in a refrigerating system and a measuring instrument. The method comprises the steps of: obtaining an intake temperature of a first compressor, an exhaust temperature of a second compressor, an evaporation pressure, a condensation pressure, shell surface temperatures of the first and second compressors, a surrounding environment temperature, a total consumption power, a spraying temperature, a first supercooling temperature, a second supercooling temperature and an oil content of a refrigerant mixture; calculating corresponding first, second, third, fourth and fifth enthalpy values, enthalpy value differences and total heat exchange quantities of the first and second compressors with external environment according to the obtained data; and calculating the mass and the flow of the refrigerant in the refrigerating system according to the first, second, third, fourth and fifth enthalpy values, the enthalpy value differences, the total consumption power, the total heat exchange quantities and the oil content of the refrigerant mixture. The method realizes non-invasion and high-precision measurement of the mass and the flow of the refrigerant in the refrigerating system, prevents adverse effect on the refrigerating system in the measuring process, and improves the user experience.
Owner:TSINGHUA UNIV
Method for calculating pressure of passive lateral rocks for jointed rocks on outwardly-inclined bedding slope
ActiveCN106547942AReliable data referenceAccurate Data ReferenceDesign optimisation/simulationSpecial data processing applicationsSoil mechanicsEngineering
The invention relates to a method for calculating pressure of passive lateral rocks for jointed rocks on an outwardly-inclined bedding slope, pertaining to the technical field of rock pressure analyses in rock and soil mechanics. The method comprises following steps: dispersing bedding joint rocks based on joint surfaces into rigid rocks in a definite number by taking jointed rocks on the outwardly-inclined bedding slope as an object of study; taking pressure of passive lateral rocks as an objective function and shearing force and normal force of joint surfaces as unknown quantities based on a Pan Jiazheng maximum principle to create an equilibrium equation satisfying damaged rocks, yield conditions of joint surfaces, and yield conditions of contact surfaces for rocks and supporting structures; and solving them to obtain the maximum limit value for passive lateral rocks for jointed rocks the an outwardly-inclined bedding slope. The method for calculating pressure of passive lateral rocks for jointed rocks on the outwardly-inclined bedding slope has following beneficial effects: the method is accurate in concept, high in calculation precision, and easy and convenient in engineering application and can be applied to design of structures for retaining walls on jointed rock slopes, slide-resistant piles and pile-anchor supports.
Owner:KUNMING UNIV OF SCI & TECH
Method for determining content of microplastics in seawater and organism-absorbed microplastics
ActiveCN107966393AAccurate Data ReferenceValid Data ReferenceFluorescence/phosphorescenceParticle suspension analysisSeawaterBiological body
The invention provides a method for determining the content of microplastics in seawater and organism-absorbed microplastics, wherein the method includes the following steps: collecting seawater in anenvironment into a container; placing a fluorescent powder material having stickiness in the container, stirring, and carrying out fluorescence labeling of the microplastics in the seawater; adding acertain amount of seawater-density solution, and stirring; removing a static sediment at the bottom of the container, and determining the concentration of the fluorescent microplastics in the seawater by a fluorescence spectrometer; placing living marine organisms in a container, and culturing for a period of time; removing the living marine organisms, and then determining the concentration of the fluorescent microplastics in the seawater in the container by the fluorescence spectrometer; and dissecting the living marine organisms, collecting target tissues and organs, and determining the concentration of the fluorescent microplastics in various target tissues and organs. The method provided by the invention can accurately detect the content of the microplastics in the seawater environment and the absorption condition of the organisms on the microplastics in the environment, and has positive significance on protection of the environment and treatment of the microplastics.
Owner:XIAMEN UNIV
Super-starting balance weight stepless luffing mechanism of crawler crane and operating method thereof
Owner:ZHEJIANG SANY EQUIP
Quick detection method for salient object
ActiveCN102426704AAccurate Data ReferenceAvoid blind explorationImage analysisWavelet transformHistogram
The invention discloses a quick detection method for a salient object. In the method, wavelet transformation is executed on a to-be-detected image many times, the size and the position of the salient object are determined according to high-frequency band data which is obtained through wavelet transformation, and then, an accurate saliency value is obtained through a center-perimeter histogram algorithm, thus, the salient object is detected accurately. In comparison with the prior art, the method provided by the invention has the benefits of high detection efficiency and accurate localization.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Elevator scene based advertisement pushing method and device
InactiveCN107886371AHigh return on investmentAccurate Data ReferenceCharacter and pattern recognitionMarketingCrowdsData profiling
The invention discloses an elevator scene based advertisement pushing method and device. The pushing method comprises the following steps that whether there are people in an elevator is detected in acyclic way; if YES, face recognition is carried out on the people to obtain face identification data, and the face identification data is uploaded to a background management system; the background management system extracts universality information of the face identification data; and according to the universality information, an advertisement player plays advertisements related to the universality information in an advertisement library. According to the invention, real-time face identification is carried out on the basis of face identification firmware in a mainboard of an elevator advertisement media terminal, the face identification data is uploaded to the background management system, the background management system extracts universality of the face identification data, a lower screen of a double-screen terminal of the elevator plays advertisements aimed at the people with the universality in an inter-cut way, and an upper screen of the terminal plays advertisement in an cyclic way. At the same time, the background management system carries out big data analysis on the face identification data, the passenger flow of a building where the elevator advertisement media terminal is placed is calculated, and accurate data reference is provided for an advertiser.
Owner:杭州一洺科技有限公司
Water quality sampling apparatus
ActiveCN106908278AImprove detection dataAccurate Data ReferenceWithdrawing sample devicesElectricityThermal insulation
The present invention relates to the field of water quality sampling equipment, particularly to a water quality sampling apparatus, which comprises a housing, a control unit, an indication unit, a vacuum pump, a sampling unit, a heating unit and a rainwater collection unit, wherein the control unit and the indication unit are arranged on the housing, the vacuum pump is electrically connected to the control unit, the sampling unit is arranged below the housing, the sampling unit comprises a vacuum sampling bottle, the sampling unit is used for performing automatic timing sampling on water to be sampled, the heating unit is connected to the sampling unit and is used for heating the sampling unit, and the rainwater collection unit is positioned on the upper portion of the housing, is controlled by the control unit, and is used for automatically collecting rainwater. With the water quality sampling apparatus of the present invention, the polluted water can be subjected to timing sampling, and the local rainwater can be collected so as to increase the polluted water area environment detection date; and the sampled water is subjected to thermal insulation storage with the sampling bottle, such that the water quality situation of the water to be sampled during the sampling can be truly reflected.
Owner:湖北川正检验检测有限公司
Face recognition algorithm evaluation method and device
PendingCN111126122AAccurate Data ReferenceImprove assessment accuracyCharacter and pattern recognitionInformation processingRecognition algorithm
The embodiment of the invention provides a face recognition algorithm evaluation method and a device, and relates to the technical field of computer information processing. The method comprises the following steps of: calculating a distance between a preset small image position point of a face small image recognized by a face recognition algorithm and a preset annotation position point of an annotated face on a corresponding frame image in a test video sequence where the face small image is located; and determining whether the small human face image is matched with the marked human face on theframe image where the small human face image is located. When the distance is smaller than or equal to a certain preset value, a fact that the face small image is matched with the marked face is determined; and when the distance is greater than a certain preset value, a fact that the small human face image is not matched with the marked human face is determined. Furthermore, by calculating the capture rate, the multi-capture rate, the false shooting rate and the face optimization rate of the face recognition algorithm for the faces in the test video sequence, the method is higher in evaluation accuracy and more comprehensive in evaluation.
Owner:ZHEJIANG UNIVIEW TECH CO LTD
Method and equipment for monitoring fall damage of farm houses in earthquake stricken area
InactiveCN105279199ASolve the problem of downfallTimely resultsSpecial data processing applicationsSensing dataDisaster area
The invention discloses a method and equipment for monitoring fall damage of farm houses in an earthquake stricken area. The method comprises the following steps of identifying house structures of the farm houses according to remote-sensing images before the disaster; dividing the farm houses with the same house structure in the same seismic intensity area into the same block; interpreting remote-sensing images after the disaster and determining a first ratio of the farm houses of different damage types in each block according to an interpreted result; determining a second ratio of the farm houses of different damage types in each block according to survey data of a disaster scene; and determining a final ratio of the farm houses of different damage types in each block according to the first ratio and the second ratio. According to the method and the equipment, the damage condition of the farm houses in the disaster area can be more objectively and accurately mastered, and the damage condition of the farm houses in the whole disaster area can be mastered by utilizing the incomplete remote-sensing data especially under the condition that the remote-sensing data cannot cover the whole disaster area.
Owner:MIN OF CIVIL AFFAIRS NAT DISASTER REDUCTION CENT +1
Method and system for calculating average travel time between adjacent bus physical stations based on bus-mounted GPS data
The invention discloses a method and a system for calculating average travel time between adjacent bus physical stations based on bus-mounted GPS data. A data acquisition module receives bus GPS historical data for 5 days, a data processing module regards a road section between adjacent bus line stations as a unit, generates a new road section number variable, modifies a data set GPS time data format, and generates a time variable which can be calculated by a data set calculation module; and the data set calculation module firstly calculates the average travel time between two adjacent line stations, then matches two data sets of the line stations and the physical stations, calculates the line station number set as a physical station number, and collects the average travel time between theadjacent physical stations at morning and evening peaks and flat peaks based on the successfully matched physical station number data. According to the method and the system, the effectiveness and accuracy of the bus GPS data can be improved, and the average travel time between the adjacent physical stations at morning and evening peaks and flat peaks can be obtained.
Owner:JIANGSU UNIV
Method and device for extracting parasitic inductances of IGBT modules
InactiveCN107766609AAvoid inconvenienceAccurate Data ReferenceCAD circuit designSpecial data processing applicationsComputer moduleInternal inductance
The invention provides a method and device for extracting parasitic inductances of IGBT modules. The method comprises the following steps of: establishing an impedance equivalent model of an IGBT module; obtaining an end impedance of each branch in the impedance equivalent module; and calculating a parasitic inductance of the IGBT module according to the end impedances. According to the method anddevice, the impedance equivalent model corresponding to the IGBT module is established according to characteristics of each circuit in the IGBT module, the end impedance of each branch in the impedance equivalent module is obtained through an experiment measurement manner, the parasitic inductance of each branch is calculated according to the end impedance of each branch and internal inductance distribution condition of the IGBT module, and finally the parasitic inductance of the whole IGBT module is obtained. Compared with the prior art, the method and device have the advantage that the extraction of parasitic inductance parameters is separately divided so that the inconvenience of data analysis due to setting the parasitic parameters into lumped parameters is avoided and more correct data reference is provided for the packaging design of the IGBT module.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
Device and method for cooling desulfurization slurry of thermal power plant
InactiveCN109482061AImprove desulfurization efficiencyReduce manufacturing costGas treatmentEmission preventionManufacturing cost reductionX-ray
The invention discloses a device and method for cooling desulfurization slurry of a thermal power plant. The device comprises a desulfurization tower, a desulfurization circulating pump, a slurry heatexchanger and an X-ray fluorescent sulfur determination instrument; one side of the desulfurization tower is provided with a smoke inlet pipe; the smoke inlet pipe is provided with a smoke inlet control valve; a sulfur content measuring and conveying pipe is arranged below the smoke inlet pipe; and the middle of the sulfur content measuring and conveying pipe is provided with a sulfur content measuring and conveying valve. The device has the beneficial effects that calcium hydroxide slurry added into a cooling and spraying layer can instantly finish an acid-base reaction with sulfur dioxide in smoke, so that the desulfurization efficiency is increased, and the deep desulfurization operation for the smoke can be finished; meanwhile, due to the adoption of the slurry heat exchanger, all spot-welding processes are omitted and are changed into a surrounding welding process, so that the production cost can be greatly reduced; and due to the arrangement of the X-ray fluorescent sulfur determination instrument, the content of sulfur in the slurry can be precisely detected at fixed time, and thus, precise data reference is provided for slurry replacement.
Owner:李申强
Human body detection device and method in automatic driving
ActiveCN110187410AEasy to detectReduce hardware costsGeological measurementsAcoustic wave reradiationHuman bodyElectricity
The invention relates to a human body detection device and method in automatic driving, and belongs to the field of automatic driving. The device comprises an ultrasonic transmission and receiving module, a pyroelectric signal receiving and processing module and a signal fusion and processing module; the ultrasonic transmission and receiving module transmits ultrasonic signals, receives return signals, filters the return signals according to a time sequence, computes a distance between a human body detection device and a target, and forms a mapping table of energy and distances; the pyroelectric signal receiving and processing module performs Gaussian filtering on collected pyroelectric signals, further performs Fourier transform and matrixing process on the pyroelectric signals, and classifies the pyroelectric signals via an svm algorithm; the signal fusion and processing module is used for fusing classification data of the pyroelectric signals with the data of the ultrasonic mappingtable, after format conversion, judging whether a human body exists, and outputting the human body distance. Via the scheme, the situation that whether the human body exists around a vehicle can be simply and accurately detected, and the detection cost can be reduced.
Owner:WUHAN ZHONGHAITING DATA TECH CO LTD
Comment method, apparatus and terminal device
InactiveCN109064180AQuality improvementImprove service qualityProtocol authorisationPaymentTerminal equipment
Theembodiment of the present invention provides a review method, an apparatus and a terminal device, wherein, the comment method includes: receiving a first comment operation of a second user on content data published by a first user, wherein the first comment operation is used for indicating information of a tendentious opinion of the second user on the content data in a non-character manner; Displaying a payment page according to the first comment operation, wherein at least one payment item is included in the payment page; Receiving a selection operation of the payment item in the paymentpage by the second user, and performing a payment operation according to the selected payment item of the selection operation to make payment for the first comment operation. Through the embodiment ofthe invention, accurate data reference can be provided for the user and the question answering community.
Owner:ALIBABA (CHINA) CO LTD
Online live shopping platform data analysis processing method, system and device, and computer storage medium
InactiveCN113191845AGood controlGuarantee shopping experience and consumer rightsMarket predictionsBuying/selling/leasing transactionsEngineeringData processing
The invention discloses an online live shopping platform data analysis processing method, system and device and a computer storage medium. The online live shopping platform data analysis and processing system comprises a live commodity information acquisition module, a viewer information acquisition module, a live interaction information acquisition module, a live sales information acquisition module, a data processing and analysis module, a database and a display terminal. Comprehensive analysis is carried out on the number of viewers, the watching duration of each viewer, the number of likes of each viewer, the number of comments of each viewer, and the trading volume and the return volume corresponding to each commodity type, the problem that the analysis content of the existing live shopping platform data has one-sidedness and the authenticity of the analysis result cannot be guaranteed is solved, efficient management and control of false live shops are realized, the return rate of shopping personnel is greatly reduced, and the consumption experience of the shopping personnel is guaranteed.
Owner:武汉新之扬电子商务有限公司
Electrical equipment self-checking device and method of high-speed magnetic levitation traction system
PendingCN112255530AHarmonic reductionImprove filtering effectElectronic circuit testingMeasuring outputHemt circuits
The invention discloses an electrical equipment self-checking device of a high-speed magnetic levitation traction system. The electrical equipment self-checking device comprises: a low-power converter, which is used for outputting alternating current with k-th frequency during a k-th test; a filter having at least N states; a controllable output switch; a detection circuit, which is used for measuring output voltage and current; a first temperature measuring device, which is used for measuring the temperature of a feed cable and each stator section; a self-checking controller, which is used for sequentially carrying out N tests, controlling the filter to be in a state corresponding to the k-th test when the k-th test is carried out, sequentially carrying out tests from a first stator section to an M-th stator section under the k-th test by controlling a stator switching station, and when any stator section is tested, based on the output of the detection circuit and the first temperature measuring device, calculating circuit characteristics. By applying the scheme of the invention, a comprehensive and precise self-checking result can be obtained. The invention further provides an electrical equipment self-checking method of the high-speed magnetic levitation traction system, and the corresponding effect is achieved.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Device for manufacturing large-are micro-nanostructures in batches and working method of device
PendingCN108762001AEnsure consistencyHigh positioning accuracyPhotomechanical apparatusNanotechnologyMicro nanoComputer module
The invention discloses a device for manufacturing large-are micro-nanostructures in batches and a working method of the device. According to the device, the precision and the quality of imprinted patterns and the efficiency and the reliability of micro-nano imprinting equipment are improved, and the service life of a mold is prolonged. According to the technical scheme, the device comprises a base plate, vertical guide rods are fixedly arranged on the base plate, the tops of the guide rods are fixedly connected with a top plate, a support plate is arranged in the middles of the guide rods ina penetrating mode, a driving device is connected with the support plate to drive the support plate to move up and down, and a pressure detection module is arranged between the driving device and thesupport plate; and an auxiliary imprinting module, a main imprinting module and a solidification module are sequentially connected to the bottom of the support plate from front to back, the auxiliaryimprinting module comprises an imprinting roller, a roller shaft is arranged in the middle of the imprinting roller in a penetrating mode, the two ends of the roller shaft are connected with imprinting roller connecting frames, the tops of the imprinting roller connecting frames are connected with a reciprocating mechanism through auxiliary imprinting module guide rods, and the reciprocating mechanism can drive the imprinting roller to move up and down.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
A method for determining the content of microplastics in seawater and the absorption of microplastics by organisms
ActiveCN107966393BAccurate Data ReferenceValid Data ReferenceFluorescence/phosphorescenceParticle suspension analysisBiological bodyFluorescence spectrometer
Owner:XIAMEN UNIV
Method for quickly forecasting content of polyaromatic hydrocarbon in living organism
InactiveCN108318624AFast predictive methodSimple forecasting methodMaterial analysisBiological bodyHealth risk
The invention discloses a method for quickly forecasting the content of polyaromatic hydrocarbon in a living organism. An adsorption balance is forecast according to a polyaromatic hydrocarbon releaserate; compared with a conventional method having the problems that the content of the polyaromatic hydrocarbon in the living organism is not detected until an aquatic product is matured to meet a market standard, a large quantity of chemical reagents are required to directly detect the content of the polyaromatic hydrocarbon in a living organism of the aquatic product and the labor cost is high,the forecasting method disclosed by the invention is quick and convenient; before the living organism completely grows into a finished product, the content of the polyaromatic hydrocarbon in the living organism of the aquatic product can be forecast only by several days, so that food safety analysis and health risk analysis can be performed, and a quick and accurate data reference is provided forthe food safety of the aquatic product.
Owner:SHANGHAI OCEAN UNIV
Process design for reducing impedance of silicon monoxide-graphite negative electrode and impedance diagnosis method
InactiveCN112563480AStrong targetingFast transferElectrical testingNegative electrodesNanowireSilicon monoxide
The invention discloses a process design for reducing the impedance of a silicon monoxide graphite negative electrode and an and impedance diagnosis method. The process comprises the following steps:adding silicon monoxide and graphite into a binder A, uniformly mixing, adding a compound of a granular conductive agent and a nanowire-shaped conductive agent, carrying out mixing by equipment, and carrying out heat treatment and particle size grading to obtain a silicon-carbon primary composite material; introducing the silicon-carbon primary composite material into specific equipment, dispersing the silicon-carbon primary composite material, a surface modifier and a carbon-based modified material additive, and performing subsequent heat treatment to obtain a silicon-carbon secondary composite material; processing the silicon-carbon secondary composite material through slurry of a high-activity substance, a low-conductivity agent and a low-binding agent and a pole piece manufacturing process to obtain a silicon-carbon negative pole piece; matching a positive electrode and a negative electrode according to the capacity surface density ratio of the positive electrode and the negative electrode to manufacture a one-to-two mode total battery with double positive electrodes and single negative electrode; and carrying out activation cycle on the whole battery, carrying out an alternating current impedance test, and measuring impedance values of corresponding parameters. According to the invention, the impedance diagnosis method matched with the method is designed in a more targetedmanner.
Owner:BAOSHAN IRON & STEEL CO LTD
Method and device for determining ambient light for terminal equipment, equipment and medium
PendingCN112781832AAccurate Data ReferenceImprove reliabilityOptical apparatus testingTerminal equipmentEngineering
The invention relates to a method and device for determining ambient light for terminal equipment, the equipment and a medium. The method comprises the steps: determining screen light leakage information corresponding to brightness information of a display screen; obtaining photosensitive information through a photosensitive element; and determining the ambient light information according to the screen light leakage information and the photosensitive information. By using the method disclosed by the invention, the influence of the screen light leakage information on the photosensitive element can be obtained, the accurate ambient light information can be obtained, accurate data reference is provided for the terminal equipment, and the reliability of controlling the terminal equipment according to the ambient light information is improved.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD
Crawler crane super-lifting counterweight stepless luffing mechanism and its operation method
Owner:ZHEJIANG SANY EQUIPMENT CO LTD
Kit for detecting content of fibrinogen
ActiveCN106645751AImprove stability and repeatabilityWide linear rangeDisease diagnosisBiological testingIonChemistry
The invention relates to the technical field of biology and particularly relates to a kit for detecting the content of fibrinogen. The kit comprises a thrombin reagent, an imidazole buffer solution and constant-value plasma, wherein the thrombin reagent comprises thrombin, imidazole, calcium chloride, mannitol, peptone, bovine serum albumin and sodium azide. A proper preparation scheme of the thrombin reagent and the imidazole buffer solution is determined and an in vitro diagnosis kit for clinical detecting the content of the FIB of human plasma in a hospital is researched. The thrombin reagent particularly contains Ca<2+> to reduce or supplement inhibited calcium ions in a clinical blood sample, an in vivo normal coagulation process is more ideally simulated and a more accurate data reference is provided for clinical detection. The basic performance of the kit reaches the industry standard requirements; the kit is high in accuracy, wide in detection range and good in stability and can be further popularized and applied to the market.
Owner:BEIJING SICCEEDER TECH CO LTD
Method and system for collectively counting average waiting time of bus physical stations
The invention discloses a method and a system for collectively counting the average waiting time of bus physical stations. A data acquisition module receives bus GPS historical data of 5 days; a datapreprocessing module modifies a data structure of a front station and a rear station in a bus GPS historical data set into a single-station structure, combines the data sets of the front station and the rear station, modifies the GPS time data format of the combined data set, and generates a time variable which can be calculated by a physical station module to match the two data sets of the line station and the physical station and collectively count the line station number as a physical station number; a data calculation module is used for counting the number of buses arriving at the successfully matched physical stations in each day and each time period, and averaging the number of buses according to the number of days to calculate the average waiting time of each physical station duringmorning and evening peak hours and peak hours according to the interval time of each time period. According to the invention, the effectiveness and accuracy of bus GPS data can be improved, and the average waiting time of each physical station during morning and evening peak hours and peak hours can be obtained.
Owner:JIANGSU UNIV
Traffic flow prediction method, device and equipment
PendingCN114819360AForecasting short-term traffic flow informationImprove intelligenceRoad vehicles traffic controlForecastingTraffic forecastData set
The invention relates to a traffic flow prediction method, device and equipment. The method comprises the following steps: acquiring traffic flow information of an intersection; slicing the traffic flow information based on a preset sampling period to obtain a plurality of pieces of historical traffic flow information, wherein the historical traffic flow information comprises the total phase flow, the corresponding date and time, the sampling period and the flow of each lane of the intersection; constructing a prediction vector data set according to the historical traffic flow information; establishing a Seq2Seq model based on an LSTM network and a coding and decoding structure; obtaining single lane flow prediction information according to the Seq2Seq model and the prediction vector data set; and obtaining the similarity between the flow of each lane of the intersection and the total phase flow according to the flow of each lane of the intersection and the total phase flow so as to obtain total phase flow prediction information. Single-lane flow prediction information is obtained according to historical traffic flow information, and short-time traffic flow information of a single intersection is predicted in combination with correlation of the flow of each lane.
Owner:JIAXING UNIV
Steel cable strength testing device for coal equipment
InactiveCN111551433AAccurate Data ReferenceIncrease clamping strengthMaterial strength using tensile/compressive forcesElectric signalStrength testing
The invention provides a steel cable strength testing device for coal equipment, and relates to the technical field of steel cable strength detection, so as to solve a problem that when a conventionalsteel cable strength detection device is used for detecting a steel cable, one section needs to be wound and fixed and then is clamped for stretching detection, so the tensile strength detection result is affected due to the fact that the winding position is prone to abrasion during tensile detection, a steel cable is prone to disengagement in the pressurizing and stretching process due to the fact that only a hydraulic clamping mode is adopted, and in the steel cable detection process, when the steel cable breaks off a steel wire, surrounding detection personnel are prone to being injured bybreakage. The device comprises a detection bench, and a control computer is fixedly mounted at the right end of the side wall of the front end of the detection table. Due to the fact that the hydraulic mechanism body is the electric air cylinder, torque changes of the left end of the connecting rod can be detected through the load sensor, then detection signals are converted into electric signalsthrough the photoelectric encoder, the electric signals are transmitted to an external control computer to be collected and recorded, and accurate data reference is provided for strength detection.
Owner:新昌县羽林街道智西机械厂
A kit for detecting fibrinogen content
ActiveCN106645751BAccurate Data ReferenceWide linear rangeDisease diagnosisBiological testingBovine serum albuminSodium azide
The invention relates to the technical field of biology and particularly relates to a kit for detecting the content of fibrinogen. The kit comprises a thrombin reagent, an imidazole buffer solution and constant-value plasma, wherein the thrombin reagent comprises thrombin, imidazole, calcium chloride, mannitol, peptone, bovine serum albumin and sodium azide. A proper preparation scheme of the thrombin reagent and the imidazole buffer solution is determined and an in vitro diagnosis kit for clinical detecting the content of the FIB of human plasma in a hospital is researched. The thrombin reagent particularly contains Ca<2+> to reduce or supplement inhibited calcium ions in a clinical blood sample, an in vivo normal coagulation process is more ideally simulated and a more accurate data reference is provided for clinical detection. The basic performance of the kit reaches the industry standard requirements; the kit is high in accuracy, wide in detection range and good in stability and can be further popularized and applied to the market.
Owner:BEIJING SICCEEDER TECH CO LTD
Automatic optimization method, system and medium of a seed caliber processing technology
ActiveCN114425732BGet the number of surface error volumesAccurate Data ReferenceOptical surface grinding machinesComplex mathematical operationsOptical processingEngineering
The invention is applicable to the field of optical processing technology, and provides an automatic optimization method, system and medium of sub-aperture processing technology. The automatic optimization method of sub-aperture processing technology includes the following steps: obtaining effective removal rate spectra of different removal functions, and the effective removal The rate spectrum is the convergence rate of the error volume of each spatial frequency corrected by the removal function; the volume spectral density function of the optical element is obtained, and the volume spectral density function is the density of the residual error material volume contained in the surface shape error of the optical element at each frequency; The optimal processing technology is obtained through the effective removal rate spectrum and the volume spectral density function. The automatic optimization method, system and medium of the sub-diameter processing technology provided by the invention have the advantages of high processing efficiency and low production cost.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
Novel lower heating graphite crucible
PendingCN114703512AReal-time monitoring of molten salt temperatureAccurate Data ReferenceCellsProcess efficiency improvementMolten saltMaterials science
The invention provides a novel lower heating graphite crucible which comprises a graphite crucible body, and the graphite crucible body is divided into a cylindrical area, a graphite thickening area, a temperature sensing heating area and a circular-truncated-cone-shaped groove area from top to bottom. An anode strip is arranged in the cylindrical area; a metal receiver is arranged at the bottom of the inner side of the circular-truncated-cone-shaped groove area, and an annular heating coil is nested in the temperature sensing heating area; two ports of the annular heating coil protrude out of the graphite crucible; an insulating component is nested between two ports of the annular heating coil, an extension groove is formed in the center of the insulating component, and a temperature sensing piece is arranged in the extension groove; according to the scheme, the temperature sensing piece is mounted at the position corresponding to the low-temperature area at the lower part of the graphite crucible, so that the temperature of molten salt at the bottom of the crucible can be monitored in real time and fed back, and accurate data reference is provided for production operation; when the temperature of the low-temperature area is too low or slagging and lifting are conducted, the low-temperature area at the bottom of the crucible can be heated through the heating coil, and therefore the purposes of eliminating slagging and lifting, protecting the crucible and improving the metal purity are achieved.
Owner:山东南稀金石新材料有限公司
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