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Cargo vehicle security state previous warning method based on braking distance
InactiveCN101983881AAccurate calculationHigh precisionPedestrian/occupant safety arrangementAnti-collision systemsSecure stateEngineering
The invention relates to a cargo vehicle security state early warning method based on braking distance, in particular to a determination method of the early warning threshold of the on-road vehicle. Aiming at the condition that the on-road vehicle is easy to have some potential dangers, the method of the invention uses the braking distance as the starting point to reflect the secure state of the vehicle. The real-time monitoring method of the on-road state of the vehicle comprises the following specific steps: extracting various factors of the vehicle such as the brake parameters, the current state factor and the outer road environment factor to perform information integration, using a braking distance model to calculate the required braking distance d1 of the current vehicle, comparing with a safe braking distance d0, calculating the degree of risk to determine the current danger condition of the vehicle, and using the range of the degree of risk as the early warning threshold of the vehicle to perform graded early warning. The invention has high instantaneity, precision and accuracy, does not require complicated calculation and design and provides a scientific and effective method for the determination of the danger condition threshold of the vehicle.
Owner:JILIN UNIV
Bionic cleaning water-based paint and preparation method thereof
InactiveCN105733385AAchieve sustained releaseThe effect of long-term lubrication and cleaningAntifouling/underwater paintsPaints with biocidesRough surfaceWater based
The invention discloses cleaning water-based paint with a bionic self-lubricating effect, and a preparation method thereof. By utilizing the characteristic that the surface is self-lubricated through a common nepenthes imitating effect, and adopting a mode of loading silicone oil on aerogel, a silicone oil lubricating fluid with the lubricating effect is sealed into a water-based resin paint base material; by combining adsorption of an aerogel porous structure and transfer behaviors, on a water-based resin surface, of silicone oil, the controlled release effect, on the surface of the water-based paint base material, of the silicone oil lubricating oil is achieved, and long-time self-lubricating cleaning effect is achieved. According to the preparation method, a super-hydrophobic rough surface is not needed to be constructed; the prepared paint has self-cleaning effect, good stability, environmental protection and no pollution; the preparation method is simple, is innovative, is high in implementation, and is more beneficial to industrial application.
Owner:宁夏金石通新材料有限公司
Multi-scale multi-physical field coupling simulation method for nuclear reactor TRISO fuel particles
ActiveCN111291494ARealize one-dimensionalRealize three-dimensional multi-scale couplingDesign optimisation/simulationNuclear reactorGeometric modeling
A multi-scale multi-physical field coupling simulation method for nuclear reactor TRISO fuel particles comprises the following steps of rstablishing 1, a zero-dimensional neutron burnup model, a one-dimensional geometric model and a three-dimensional geometric model; 2, setting a solution domain, an initial condition and a boundary condition at different scales; 3, completing neutron burnup calculation in each time step length, preliminarily calculating fission gas release amount in the fuel pellet one-dimensional geometric model, and completing preliminary calculation of heat transfer and mechanics in the fuel particle three-dimensional geometric model; and 4, taking a calculation result in the one-dimensional geometric model of the fuel pellet in the step 3 as calculation input in the three-dimensional geometric model of the fuel pellet in the next time step length, wherein he calculation result in the fuel particle three-dimensional geometric model in the step 3 is used as calculation input in the fuel pellet one-dimensional geometric model of the next time step, and calculation results of heat transfer and mechanics are mutually transmitted; and 5, repeating the coupling process in the step 4 until the calculation is converged, otherwise, returning to the step 3 until the calculation is converged.
Owner:XI AN JIAOTONG UNIV
Method for establishing full three-dimensional coupling model of reactor U-shaped tubular steam generator
ActiveCN110020476AAchieve couplingHigh precisionDesign optimisation/simulationSpecial data processing applicationsShell and tube heat exchangerCoupling
The invention discloses a method for establishing a full three-dimensional coupling model of a reactor U-shaped tubular steam generator, which is suitable for all systems related to energy conversionby adopting a shell-and-tube heat exchanger in the field of energy. The coupling method mainly comprises the following steps: 1, simplifying a geometric model of the steam generator; 2, establishing aprimary and secondary side geometric model; 3, carrying out primary and secondary side three-dimensional computing node division; 4, performing spatial dispersion on a pipe side (primary side) energysource item; 5, performing spatial discretization on a shell side (secondary side) energy source item; 6, coupling primary and secondary side energy source items at the same coordinate node; and 7, performing data transmission between the primary side and the secondary side and on internal nodes of each side, and performing iteration to obtain a convergence solution. Geometric model simplification is mainly used for simplifying the workload caused by the number of a large number of heat transfer pipes to model establishment and numerical calculation. Primary and secondary side computing nodedivision adopts a completely identical division strategy; each side energy source item is obtained through a discrete flow heat transfer equation; and the data exchange of the energy source items on the two sides is carried out between the corresponding primary and secondary side computing nodes under the same coordinate.
Owner:XI AN JIAOTONG UNIV
Preparation method of composite film layers and method of using same to remove tetracycline residue in pharmaceutical wastewater
ActiveCN107803119AMethod innovationEasy to operateSemi-permeable membranesWater contaminantsComposite filmPolyetherimide
The invention relates to a preparation method of composite film layers and a method of using the same to remove tetracycline residue in pharmaceutical wastewater. The method is characterized by comprising: making GO (graphene) into GO solution, dissolving zinc nitrate and 2-methylimidazole respectively in methanol, mixing, adding the GO solution quickly into the mixed solution, stirring well, centrifuging, washing, drying to obtain ZIF-8 (zeolitic imidazolate framework) / GO composite powder, ultrasonically treating the composite powder to obtain a suspension, and binding the dispersed ZIF-8 / GOsuspension and polyetherimide-modified microporous filter film by means of vacuum suction filtering to form ZIF-8 / GO composite film layers different in thickness; using a vacuum suction filter to passpharmaceutical wastewater through the above composite film layers, and performing suction filtering repeatedly; tetracycline in the tetracycline is removed to 88.9-95.5%; the preparation method of the composite film layers and the method of using the same have the advantages that operations are simple, the cost of raw materials is low, recycling is facilitated, and the materials are reusable.
Owner:NINGXIA UNIVERSITY
Method for building Nierji reservoir water ecological risk early warning model through fusion technology
InactiveCN105303007ARealization riskImplement decisionGeneral water supply conservationSpecial data processing applicationsEcological riskReservoir water
The invention discloses a method for building a Nierji reservoir water ecological risk early warning model through the fusion technology, and relates to a method for building a Nierji reservoir water ecological risk early warning model. A system dynamics decision-making module is adopted for risk early warning and decision making quantitative analysis, then a Bayesian network model is adopted for risk early warning and decision making quantitative analysis according to a quantitative analysis result, and therefore Nierji reservoir water ecological risk early warning and decision making are achieved. The Nierji reservoir water ecological risk early warning model is built, the system dynamics and the Bayesian network model technology are fused, quantitative advantages in early-warning and decision-making research are highlighted, and Nierji reservoir water ecological risk early warning and decision making are achieved. The accuracy of the model is verified based on comparison and analysis for current data, and the availability of the model is verified through early-warning research on relative risk source risks and decision-making research on control strategies.
Owner:松辽流域水资源保护局松辽流域水环境监测中心 +1
Method for preparing modified wood by compounding heat treatment based on alkali lignin
InactiveCN107972144AImprove waterproof performanceOvercome crackingWood treatment detailsThermal wood treatmentCompound aHeat treated
The invention relates to a method for preparing modified wood by compounding heat treatment based on alkali lignin. The method comprises the following steps: (1) soaking the wood treated in vacuum ina 1,4-dioxane solution with alkali lignin, adjusting the pressure to 0.2-0.8MPa and retaining the pressure for 50-90 minutes; and (2) taking the wood soaked in the step (1) out, drying the wood, putting the wood under the condition at the temperature of 120-200 DEG C, and carrying out heat treatment for 1.5-4 hours to obtain the modified wood. The method is used as a non-toxic and long-acting woodmodification manner with low cost and simple process; the modified wood with high water resistance and high size stability is prepared by compounding a heat treatment method; the defects of high possibility of cracking and high possibility of deformation of the fast-growing wood can be effectively overcome; the bottleneck problem of utilization of the fast-growing wood at present can be solved.
Owner:BEIJING FORESTRY UNIVERSITY
Lane line automatic extraction method based on vehicle trajectory
ActiveCN105488485AMethod innovationWith removableCharacter and pattern recognitionMinimum bounding rectangleComputer science
The invention discloses a lane line automatic extraction method based on a vehicle trajectory. The method comprises the following steps: step 1, extracting the vehicle trajectory; step 2, creating a vehicle trajectory image; step 3, eliminating trajectory adhesion between different lanes based on morphological close operation and erosion; and step 4, extracting a lane line by a minimum enclosing rectangle method. The lane line automatic extraction method based on the vehicle trajectory provided by the invention does not depend on a road marking, therefore, the lane line automatic extraction method is also applicable to road areas without markings or the markings are fuzzy; the invention can extract the lane lines of multiple lanes simultaneously and the efficiency is high; besides, an unmanned aerial vehicle has an advantage of being mobile, therefore, the unmanned aerial vehicle can be used for performing lane line extraction on road sections without traffic monitoring equipment.
Owner:BEIHANG UNIV
Process for making bacteriostatic backing material with silver film
InactiveCN1865487AReduce manufacturing costMethod innovationVacuum evaporation coatingSputtering coatingVacuum chamberSilver film
The invention discloses a preparing method of bacteriostatic base material with silver film, which comprises the following steps: preparing vacuum cavity within one spraying target source; placing silver target material on the spraying target source; putting base material; loading base material in the vacuum cavity; filling one gas to form electrical paste in the vacuum cavity; charging preset power current to splash silver atom; depositing on the one surface of base material to form nanometer silver film.
Owner:CHINESE UNITED SEMICON EQUIP MFG +1
Method for establishing nuclear power system shell-and-tube heat exchanger numerical model under motion condition
ActiveCN111274747AConsider mobilityConsider all featuresDesign optimisation/simulationCAD numerical modellingComputational modelEngineering
The invention discloses a method for establishing a numerical model of a shell-and-tube heat exchanger of a nuclear power system under a motion condition. The method is suitable for establishing a three-dimensional numerical calculation model of large heat exchange equipment of the nuclear power system under the motion condition that different forms are generated under certain external force. Thethree-dimensional numerical calculation model is mainly based on a three-dimensional thermal hydraulic numerical calculation model of the shell-and-tube heat exchanger in static operation. According to the motion forms and the stress characteristics under different motion conditions, the stress is uniform; motion decomposition, stress analysis and decomposition of a single motion, establishment ofan additional force source item acting on a momentum equation under the single motion, and a composite motion additional force source item synthesis process are carried out on a shell-and-tube heat exchanger under a composite motion condition; and finally, establishing a set of numerical calculation model capable of accurately describing the thermal hydraulic characteristics of the shell-and-tubeheat exchanger of the nuclear power system under the composite motion condition.
Owner:XI AN JIAOTONG UNIV
Underwater propeller testing device
ActiveCN108279084AReduce turbulenceImprove accuracyMeasurement of vehicle's tractive/propulsive powerPropellerMarket needs
The invention discloses an underwater propeller testing device which comprises an elongated water tank. An elongated clamping groove is arranged inside the elongated water tank in a sleeved manner, and a left-right linear section and a front-rear arc-shaped section are formed between the elongated water tank and the elongated clamping groove and are communicated to form an annular water tank; a supporting frame is arranged on the left-side or right-side linear section of the annular water tank, a rail is mounted on the supporting frame, a propeller support is mounted on the rail, a propeller is fixed at the lower end of the propeller support, and the propeller support slides along the rail through a slider; a press piece is arranged at the upper end of the propeller support, a pressure sensor matched with the press piece is arranged at one end of the supporting frame, and the press piece and the pressure sensor are on a same straight line. The underwater propeller testing device effectively lowers impact of turbulence on propeller thrust testing, improves testing accuracy, is simple in design and convenient and quick to operate, meets market needs and has great market prospect.
Owner:OCEAN UNIV OF CHINA
Ornamental cotton hybrid seed production method
InactiveCN105284602AGuaranteed purityShort breeding cyclePlant genotype modificationHybrid seedAgricultural science
The present invention provides an ornamental cotton hybrid seed production method, a short season cotton conventional material or a short season cotton HB safflower marked material is used for hybridization with upland cotton material T586, by hybridization breeding, stable lines carrying different traits are bred; the lines are transformed into sterile lines by use of an upland cotton cytoplasmic sterile line material as female parent and the bred stable lines carrying different traits respectively as male parent; the obtained sterile line carrying target trait is selected as female parent, sea island cotton sea 7124 or upland cotton HB is selected as male parent, hybridized combination is configured, and the generation F1 is ornamental cotton. The method can shorten the breeding cycle of the ornamental cotton, and broaden the ornamental cotton parental origin. The performances of the ornamental cotton in planting are: sterility, and only flowering without balling and opening of bolls, nutrient demand is relatively less, the cost of cultivation is reduced, and the purity of the ornamental cotton can be ensured because no seed is left for re cultivation.
Owner:SHANDONG COTTON RES CENT
Anisotropic composite profile and preparation method thereof
The invention discloses an anisotropic composite profile, which comprises heat conduction silica gel and heat conduction sheets. The heat conduction sheets are arranged layer by layer at intervals, and the heat conduction silica gel fills a gap between every two adjacent layers of heat conduction sheets to form a heat conduction silica gel layer. The structure is novel, the method is innovative, the attaching performance of the anisotropic heat conduction material is optimized, the application range of the anisotropic heat conduction material is expanded, the production process steps are simple, the production efficiency is improved, and the production cost is reduced.
Owner:东莞市高酷纳米科技有限公司
Bionic self-lubricating surface as well as preparation method and application thereof
ActiveCN105733426AAchieve sustained releaseImprove durabilityPolyurea/polyurethane coatingsRough surfaceSilicone oil
The invention discloses a bionic self-lubricating surface as well as a preparation method and application. In a mode that silicon oil is loaded by aerogel, a silicon oil lubricating liquid with a lubrication effect is sealed into an organic silicon polyurethane substrate, with the combination of adsorption of an aerogel porous structure and migration of the silicon on the surface of the organic silicon polyurethane, a function that the silicon oil lubricating oil is slowly released on the surface of the organic silicon polyurethane substrate is achieved, and a self-lubricating effect is achieved. By adopting the bionic self-lubricating surface and the preparation method disclosed by the invention, the defect that lubricating oil is large in consumption when a smooth porous surface which has a common nepenthes effect is established by using an infiltration method can be avoided, moreover, no rough surface needs to be established in the preparation method, and the prepared self-lubricating surface is good in durability; the bionic self-lubricating surface is simple in preparation method, creative in method, good in implementation property and relatively beneficial to industrial application.
Owner:泉州三欣新材料科技有限公司
Bulk commodity industry data analysis service platform
The invention relates to a bulk commodity industry data analysis service platform comprising a database, a bulk commodity information collection module, a bulk commodity data analysis module, a market tracking module, and a market condition release module. The database, the bulk commodity information collection module, the bulk commodity data analysis module, the market tracking module and the market condition release module are connected with a server via the Internet or through direct access. Based on information and data collected over the years and through sorting analysis and mining by the company's data center, a piece of complete bulk commodity industry big data software including 120,000 indexes, 14,000,000 pieces of data and a daily update of 30,000 pieces of data is built. Public services including information, research report, market tracking and data analysis are provided for bulk commodities as well as large production enterprises, financial institutions, government departments and mainstream media organizations upstream or downstream of the bulk commodities. Comprehensive, objective and timely data support is provided for the research analysis of the bulk commodity industry and the entire industry chain.
Owner:SHANGHAI GANGLIAN E COMMERCE
Preparation method of modified graphene/acrylate composite water-based coating
The invention discloses a preparation method of a modified graphene / acrylate composite water-based coating, and belongs to the field of water-based coatings. The method comprises the following steps:preparing graphene according to a liquid-phase separating method; performing intercalated modifying on the graphene through a cationic surface active agent which is hexadecyl trimethyl ammonium bromide; then polymerizing in situ; copolymerizing sodium p-styrenesulfonate and acrylate to obtain modified acrylate; preparing hexadecyl trimethyl ammonium bromide modified graphene / acrylate composite water-based coating under the electrostatic interaction of electropositive ammonium ion and electronegative sulfonate group. The prepared modified graphene / acrylate composite water-based coating has theadvantages that the outstanding heat conduction capacity, the antistatic performance and the mechanical performance of the graphene are fully applied to acrylate, so that the performance of the composite coating can be greatly improved; the composite coating is outstanding in mechanical performance and heat conduction performance.
Owner:FUZHOU UNIV
Data processing method for Beidou and GPS common frequency point real-time signal receiving and processing system
InactiveCN104730543AMethod innovationReduce computationSatellite radio beaconingInternal memoryRF front end
The invention discloses a data processing method for a Beidou and GPS common frequency point real-time signal receiving and processing system. Beidou second generation and GPS common frequency point signals are transmitted into three RF front-end modules through the same antenna, through a series of amplification, filtering and down-conversion, the signals are converted into 2-bit medium-frequency digital signals in an A / D mode, the medium-frequency digital signals are acquired into an internal storage of an FPGA under the control of the FPGA and stored as data blocks of certain length in a ping-pong mode, and finally, the data blocks are transmitted to a computer through a USB controller. The method has the advantages that the technical purposes that the Beidou second generation and the GPS common frequency point signals are captured rapidly on a software framework of a computer platform and the data are processed in real time are achieved, and the locating accuracy, the reliability, the integrity and the usability of a single locating system are remarkably improved; based on software development of the software radio technology, an algorithm of a traditional hardware receiver is eliminated, and a reconfiguration research mode is achieved.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Online enrichment system for gaseous and granular semi-volatile organic compounds and method and application
PendingCN111751479AAvoid errorsRealize online accurate measurementComponent separationPhysical chemistryMass Spectrometry-Mass Spectrometry
The invention relates to an online enrichment system for gaseous and granular semi-volatile organic compounds. The system comprises a vaporizing chamber, an electromagnetic three-way valve, a first two-position six-way valve, a particulate trapping device, a primary trapping trap, a secondary focusing trap, a second two-position six-way valve, a first mass flow controller, a second mass flow controller, a gas pump, a gas chromatography-mass spectrometry detection system, an enrichment-thermal desorption device, a gas supply and pressure control system, a sample injection pipe and a heat tracing system. The system is simple in gas circuit; gaseous and granular SVOCs can be enriched on line and directly measured; the time resolution is 85 min; the gaseous and granular semi-volatile organic compounds are captured and measured on line; errors of a traditional indirect measurement and calculation method are avoided; the time resolution is high; energy consumption is low; the structure is compact; the device is small; operation is easy; the result is reliable; and the gaseous and granular semi-volatile organic compounds can be accurately measured on line.
Owner:PEKING UNIV
Simulating calculation method for porosity of clastic rock reservoir on basis of diagenetic facies logging identification technology
ActiveCN108362621AImprove predictive abilityMethod innovationPermeability/surface area analysisGeological measurementsPorosityFacies
The invention discloses a simulating calculation method for porosity of a clastic rock reservoir on the basis of a diagenetic facies logging identification technology. According to the method, diagenetic facies in a research area is researched in a detailed manner with the diagenetic facies logging identification technology, so that a PDFP (present diagenetic facies profile) of the research area is established, and finally, porosity of an interval of clastic rock is subjected to simulating calculation through combination with burial history, thermal history, fluid history and pressure historyof the research area.
Owner:YANGTZE UNIVERSITY
Soybean-source anti-oxidative peptide nano-liposome and preparation method thereof
ActiveCN104940139ALow costOptimize the process routePeptide/protein ingredientsAntinoxious agentsFreeze-dryingLiposome
The invention belongs to the technical field of agricultural product processing, in particular to a soybean-source anti-oxidative peptide nano-liposome and a preparation method thereof. The preparation method comprises the steps of mixing, ultrasonic processing, low-pressure evaporation, vacuum evaporation, re-ultrasonic processing, adding of a freeze-drying protective additive, and freeze drying under the conditions that 3-10 kDa soybean anti-oxidative peptide is taken as a raw material, and the encapsulation efficiency, grain size and electric potential are taken as quality test indicators. The preparation method integrates a reverse evaporating method, an ultrasonic method and a freeze-drying method, and has the advantage that liposome, of which the encapsulation efficiency is 45.43% or higher, the grain size reaches 531.2 mm or lower, and the electric potential reaches -19.8 mV or lower, is obtained finally. The soybean-source anti-oxidative peptide nano-liposome and the preparation method have the advantages that the raw material cost is lower; the designed process route is simple and convenient; the method is creative; a novel way is provided for comprehensive utilization of soybean-source anti-oxidative peptide.
Owner:JILIN UNIV
Preparation method of silicon carbide aerogel thermal insulation material
The invention relates to a preparation method of a silicon carbide aerogel thermal insulation material, and belongs to the technical field of thermal insulation materials. The preparation method of the silicon carbide aerogel thermal insulation material comprises preparation of a silicon carbide aerogel reinforced fiber material and an integral compounding process of the material. The preparation method comprises the steps of soaking a carbon fiber material in silica sol dissolved with silicon carbide, gelling, aging and drying to obtain a silicon carbide aerogel reinforced fiber material, and carrying out composite molding on the reinforced material to obtain the aerogel thermal insulation material. By applying the silicon carbide aerogel to the carbon fiber thermal insulation material, the carbon fiber thermal insulation material has the advantages of large specific surface area, low heat conductivity coefficient, small density and the like, and the preparation method is simple and easy for industrial mass production.
Owner:LIAONING JINGU CARBON MATERIALS CO LTD
Traditional Chinese medicine preparations for treating gynecology disease
InactiveCN101152532AMethod innovationEasy for clinical promotion and useInanimate material medical ingredientsPharmaceutical delivery mechanismCITRUS MEDICA FRUITAdemetionine
The invention discloses a traditional Chinese medicine preparation. the weight portion of the raw materials for preparing effective components are: 2.0 to 2.4 portion of Chinese thorowax root, 4.2 to 4.6 portion of white peony alba, 4.3 to 4.5 portion of glehnia root, 3.0 to 3.5 portion of nutgrass galingale rhizome (prepared with vinegar), 3.0 to 3.5 portion of turmeric root tuber, 4.2 to 4.6 portion of medlar, 4.2 to 4.6 portion of spine date seed, 4.2 to 4.6 portion of dragon bone, 4.2 to 4.6 portion of oyster, 3.0 to 3.5 portion of orange fruit, 1.5 to 1.8 portion of fingered citron and 1.5 to 1.8 portion of common aucklandia root. The invention also discloses a method of preparing the traditional Chinese medicine preparation and application of the method in preparing the medicine for curing premenstrual tension syndrome. The traditional Chinese medicine preparation has definite curative effect without obvious toxicity and side effect.
Owner:杨波 +3
Well head and well bottom pressure conversion method for shale gas horizontal well under two-phase flow conditions
InactiveCN106777574AMethod innovationRigorous thinkingData processing applicationsDesign optimisation/simulationDynamic monitoringHydrology
The invention discloses a well head and well bottom pressure conversion method for a shale gas horizontal well under two-phase flow conditions. The well head and well bottom pressure conversion method comprises the step of logging data, such as daily output, pressure and temperature of a production well head based on the condition that a well shaft of a shale gas production well has two phases of gas and liquid. The flowing states of the well shaft of a vertical section and a horizontal section of a gas well are analyzed by taking the influence of factors, such as nonlinear change of gas, a slippage effect and pipe wall frictional resistance, into consideration, and integrating a testing result of a production profile of the production well, so that a two-phase flow pipe flow model is selected, and well head and well bottom pressure conversion is carried out. According to the well head and well bottom pressure conversion method for the shale gas horizontal well under the two-phase flow conditions, the technical difficult problems about flow state distribution characteristics of the well shaft of the shale gas horizontal well are effectively solved by fully and comprehensively utilizing production dynamic monitoring data, and a foundation is laid for converting well head and well bottom pressure in the next step. Meanwhile, a result is verified by adopting underground permanent monitoring data and output profile test data; the well head and well bottom pressure conversion method has the characteristics that the method is innovative, the thought is rigorous, the application is simple, and the analysis results are accurate and reliable.
Owner:中石化石油工程技术服务有限公司 +1
A water ecological risk assessment method for typical areas of the Nenjiang River Basin based on a system dynamics decision model
InactiveCN105224772BAccelerate practical engineering applicationsMethod innovationSpecial data processing applicationsEnvironmental resource managementDecision model
A water ecological risk assessment method for a typical area of the Nen River Basin based on a system dynamics decision model, which relates to a water ecological risk assessment method for a typical area of the Nen River Basin. The method of the present invention is as follows: through the system dynamics decision-making model, the tributary influx, non-point source discharge, upstream water and sewage discharge along the river that affect the amount of pollution sources entering the Nierji Reservoir are used to simulate different treatment schemes to reduce the pollution of the reservoir. The effect of ecological risk is to realize the decision-making of the plan, and on the basis of the water ecological risk index system, evaluate the water ecological risk status of different points in the lake in different periods, and build the sample space of Bayesian network based on Netica software to calculate each index The probability of occurrence of different degrees of ecological risk when changes occur, so as to realize the assessment of water ecological risk in typical areas of the Nenjiang River Basin. The invention is applied to water ecological risk assessment in typical areas of river basins.
Owner:松辽流域水资源保护局松辽流域水环境监测中心
An automated process safety monitoring system based on modbus protocol
InactiveCN103941700BImprove timelinessMethod innovationTotal factory controlProgramme total factory controlMonitoring systemProcess safety
The invention discloses an automation process safety monitoring system based on a Modbus protocol. The automation process safety monitoring system comprises a monitoring main machine, a full-function slave machine and simple-function slave machines. The full-function slave machine has a monitoring function and a linkage control function, and each simple-function slave machine only has a monitoring function. In automation process safety monitoring, the full-function slave machine is bound with a plurality of appointed simple-function slave machines, the full-function slave machine starts a Modbus communication network message to recognize a receiving program, monitoring data sent by the bound simple-function slave machines are analyzed out, whether the monitoring signal parameters of the bound simple-function slave machines are normal is judged, and linkage interlock protection is carried out if abnormity is found. The automation process safety monitoring system solves the problem that direct linkage control between slave machines cannot be achieved due to the fact that the slave machines cannot communicate with each other. Furthermore, the timeliness of the monitoring system is improved.
Owner:张晓华 +1
Data processing method for Beidou and GPS common frequency point real-time signal receiving and processing system
InactiveCN105388504AMethod innovationReduce computationSatellite radio beaconingInternal memoryIntermediate frequency
The invention discloses a data processing method for a Beidou and GPS common frequency point real-time signal receiving and processing system. Beidou second generation and GPS common frequency point signals are transmitted into three RF (radio frequency) front-end modules through the same antenna, through a series of amplification, filtering and down-conversion, the signals are converted into 2-bit medium-frequency digital signals in an A / D mode, the medium-frequency digital signals are acquired into an internal storage of an FPGA under the control of the FPGA and stored as data blocks of certain length in a ping-pong mode, and finally, the data blocks are transmitted to a computer through a USB controller. The method has the advantages that the technical purposes that the Beidou second generation and the GPS common frequency point signals are captured rapidly on a software framework of a computer platform and the data are processed in real time are achieved, and the locating accuracy, reliability, integrity and usability of a single locating system are remarkably improved; and based on software development of the software radio technology, an algorithm of a traditional hardware receiver is eliminated, and a reconfiguration research mode is achieved.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Real-time signal receiving and processing system of public frequency points of Beidou navigation satellite system and GPS
InactiveCN105372683AMethod innovationReduce computationSatellite radio beaconingInternal memoryIntermediate frequency
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
A method for building a full three-dimensional coupled model of a reactor u-tube steam generator
ActiveCN110020476BAchieve couplingHigh precisionDesign optimisation/simulationSpecial data processing applicationsShell and tube heat exchangerGeometric modeling
A method for establishing a full three-dimensional coupling model of a reactor U-shaped tube steam generator is applicable to all systems in the energy field that use shell-and-tube heat exchangers for energy conversion. The coupling method mainly includes the following parts: 1. Simplification of the geometric model of the steam generator; 2. Establishment of the geometric model of the primary and secondary sides; 3. The three-dimensional calculation node division of the primary and secondary sides; 4. The energy source item space of the tube side (primary side) Discrete; 5. Discretization of energy source items on the shell side (secondary side); 6. Coupling of energy source items on the primary and secondary sides at the same coordinate nodes; 7. Data transfer between primary and secondary sides and internal nodes on each side, iteration a convergent solution. Geometric model simplification is mainly used to simplify the workload caused by a large number of heat transfer tubes for model establishment and numerical calculation; the division of primary and secondary calculation nodes adopts exactly the same division strategy; the energy source items of each side are obtained through discrete flow heat transfer equations; The data exchange of energy source items on both sides is carried out between the corresponding primary and secondary computing nodes under the same coordinates.
Owner:XI AN JIAOTONG UNIV
A method for preparing super-hydrophobic composite nano-array interface material
A method for preparing a super-hydrophobic composite nano-array interface material, the preparation steps are: 1) using a copper sheet as a base material to prepare a zinc oxide nanocone film by chemical bath deposition in a hot water bath; 2) using a vapor phase deposition method on Use seventeen perfluorosilane to super-modify the oxidized nano-cone membrane at 120°C; 3) configure polyvinyl alcohol low-solid content aqueous solution; The aqueous solution is atomized through the condensation platform to reduce the surface temperature of the copper-based zinc oxide nano-cone film to 1°C to 5°C, so that the polyvinyl alcohol dispersion liquid dispersed in the air can condense the surface of the super-hydrophobic zinc oxide nano-cone film evenly, at high magnification Atomized deposition under the observation of the CCD imaging system; 5) Quickly transfer to a constant temperature hot stage, and cure at a constant temperature. After the solvent moisture is completely volatilized, the polyvinyl alcohol is cured and adsorbed and adhered to the surface of the zinc oxide nanocone to form a hydrophilic-hydrophobic composite nano-array interface; The process is simple, the cost is low, and the resistance to condensation and frosting is high.
Owner:SHAANXI UNIV OF SCI & TECH
Method and device of automatically monitoring suspended load sediment by replacement method
PendingCN110595931ASignificant practical valueReduce manual interventionOpen water surveyMaterial weighingWater pipeEngineering
The invention discloses a method and a device of automatically monitoring suspended load sediment by a replacement method. The device includes an overwater portion and an underwater portion. The underwater portion includes a lead fish and a cable. A submersible pump is mounted on the cable above the lead fish. A water inlet of the submersible pump is parallel to a main line of the lead fish. An upper water pipe of the submersible pump protrudes from a water surface and is provided with a solenoid valve. The overwater portion includes a water container. The water container is placed on a weighing sensor through a support frame. An overflow water pipe is arranged at an upper end of the water container. An upper end of the overflow water pipe opens into an overflow drainage pipe. A drainage pipe is arranged at a lower end of the water container. A solenoid valve is arranged on the drainage pipe. A first temperature sensor is mounted at the same height as the submersible pump. A second temperature sensor is mounted at the overflow drainage pipe. According to the device, automation of observing of suspended load sediment of rivers can be realized, manual intervention and errors caused by manual intervention are greatly reduced, work efficiency can be improved by dozens of times, and energy consumption is greatly reduced.
Owner:赵如月
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