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Driver watching object identification system based on dummy real-life
InactiveCN101236702AEasy statisticsImprove test efficiencyAnalogue computers for vehiclesDiagnostic recording/measuringDriver/operatorFixation point
The invention relates to an object recognition system on the basis of the virtual reality, wherein, the object is stared by a driver. The invention comprises an eye tractor (1) and an automobile driving simulation system, wherein, the automobile driving simulation system comprises an automobile driving simulator (5), a display screen (2) and a simulation system computer (3), wherein an output terminal of the eye tractor (1) is connected with the simulation system computer (3) which comprises a driving simulation program module, a scene manager, a scene staring object positioning ray calculation module, an intersectant vision object calculation module, an intersectant vision object recognition module and a fixation point screen coordinate calculation module; the scene manager comprises world coordinates of each object in the scene and the category information. The object recognition system combines the virtual reality technique and identifies the types of staring objects on the basis of tracking and obtaining the fixation point coordinates of the driver; the test efficiency is high, the cost is low, and the statistic of the test result is easily realized, thereby contributing to the scientific research.
Owner:WUHAN UNIV OF TECH
Underwater sub-wavelength resolution ratio three-dimensional imaging method
InactiveCN102928844ASimple structureAchieving identifiabilityAcoustic wave reradiationSound imageImage segmentation
The invention discloses an underwater sub-wavelength resolution ratio three-dimensional imaging method. The underwater sub-wavelength resolution ratio three-dimensional imaging method includes the following steps: (1) a sound signal is emitted; (2) acoustic lens wave beams are formed; (3) the sound signal is received and adjusted; (4) an image is processed and displayed. A two dimensional datum is obtained according to an imaging rule of an acoustic lens, a distance datum is obtained by utilizing an emission time and a receiving time, and a three dimensional underwater sound datum is obtained by combining with an electric signal received by a underwater sound sensor. The three dimensional underwater sound image datum undergoes image enhancement and image segmentation and a three dimensional image of a target is achieved by use of an open-sourcing visualization program library visualization toolkit (VTK). A reflected sound wave is focused through the acoustic lens and forms the wave beam. Hardware circuits of a normal imaging system are greatly reduced. A sub-wavelength image is achieved due to the characteristic of negative refraction of a phonon crystal. The novel underwater sound sensor with a mesoscopic pressure resistance is utilized, the underwater sound sensor responds to an underwater sound signal well, and a faint underwater signal can be effectively transformed.
Owner:ZHONGBEI UNIV
Hybrid vision servo system and method combining eye-to-hand and eye-in-hand structures
InactiveCN106041927AHigh positioning accuracyIncrease flexibilityProgramme-controlled manipulatorVisual servoingEngineering
The invention discloses a hybrid vision servo system and method combining eye-to-hand and eye-in-hand structures. According to the hybrid vision servo system and method, information of a to-be-identified target is acquired through an eye-to-hand camera and an eye-in-hand camera; position calculation is performed through a computer; and a driver is controlled to drive a mechanical arm to drive the eye-in-hand camera for precisely positioning the to-be-identified target. Compared with traditional vision servo based only on position and vision servo based on images, the hybrid vision servo system and method have higher positioning precision and flexibility; the characteristics that an overall vision field is large in range and a local vision field is high in precision are realized; the cost is low; the applicability is high; the application range is wide; great convenience can be brought to application in scientific research, target searching and positioning and the like; and the hybrid vision servo system and method have very important research value and practical significance.
Owner:XI AN JIAOTONG UNIV
High-resolution remote-sensing image land cover change detection method based on history data mining
InactiveCN104899897AImplement change detectionRealize high-precision automationImage enhancementImage analysisMean squareImage segmentation algorithm
The present invention relates to a high-resolution remote-sensing image land cover change detection method based on history data mining, which comprises: acquiring historical land cover data, a corresponding history period high-resolution remote-sensing image and a current high-resolution remote-sensing image and under the constraint of the historical land cover data, segmenting the high-resolution remote-sensing image by using an image segmentation algorithm to obtain objects with homogeneous internal spectrums and textures; selecting part of unchanged objects, carrying out relative radiometric correction on the high-resolution remote-sensing image in two periods, and dividing the rest of objects into unchanged objects and suspected changed objects by using a mean square error obtained upon radiometric correction as a threshold; extracting spectrum and texture characteristics of the objects in the history period image and acquiring a classification rule by using a machine learning algorithm; and classifying the suspected changed objects in the current high-resolution remote-sensing image by using the classification rule so as to obtain a change detection result. The high-resolution remote-sensing image land cover change detection method according to the present invention has great application prospects in the aspect of using the high-resolution remote-sensing images to automatically update the land cover data, carry out change detection or carry out classification.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Preparation method of molybdenum-doped cobalt-iron oxide nano-sheet bifunctional electrocatalyst
ActiveCN110227531ALarge specific surface areaGood charge transport abilityMaterial nanotechnologyCatalyst activation/preparationChemistryBrown iron oxide
The invention relates to the technical field of two-dimensional electrocatalyst and discloses a preparation method of a molybdenum-doped cobalt-iron oxide nano-sheet bifunctional electrocatalyst. Specifically, Co(NO3)2.6H2O, Fe(NO3)2.9H2O and (NH4)6Mo7O24.4H2O, urea and NH4F are added to water to form a solution according to the molar ratio of 1:1:0.001-1:1:3, the solution and the substrate material are transferred to an autoclave, and CoxFeyMozO NSs is hydrothermally synthesized, which can be used as high-efficiency electrocatalyst in the process of electrochemical decomposition of water; theultrathin nanostructure of that present invention has a large specific surface area, and also has excellent charge transfer capability and a large number of active sites, the CoxFeyMozO NSs has excellent OER and HER activity and long-term cycle durability. The method of the invention has the advantages of low cost and easy operation, and is beneficial to popularization and application.
Owner:TAIYUAN UNIV OF TECH
Liquid-phase stripping preparation method of single-layer or few-layer phosphaalkene
InactiveCN105645366AFacilitate scientific researchIncrease productionPhosphorus preparationOrganic solventCentrifugation
The invention relates to a liquid-phase stripping preparation method of single-layer or few-layer phosphaalkene. The preparation method comprises the following steps: mixing flaky black phosphorus and an organic solvent, sequentially carrying out ultrasonic cracking treatment and centrifugation, dropwisely adding the supernate of the product onto a substrate, and carrying out spin coating or drying to obtain the single-layer or few-layer phosphaalkene. The method can implement mass production on phosphaalkene with the minimum single layer, has the advantages of low cost and high yield, and is beneficial to further scientific research and popularization and application of phosphaalkene.
Owner:SHANGHAI JIAO TONG UNIV
Low-cost calibration system for multiple air quality monitoring sensors
ActiveCN106226483ACost-effectiveImprove performanceGas analyser construction detailsCalibration gasEngineering
A low-cost calibration system for multiple air quality monitoring sensors comprises a machine cabinet, a calibration cabin and a static pressure box, wherein the machine cabinet is used for providing polluted gas with set concentration and controlling the speed of calibration gas, the calibration cabin is arranged at the upper end of the machine cabinet, communicated with the machine cabinet and provided with the calibrated sensors, and the static pressure box is connected with the upper end of the calibration cabin through a first flange; a flow equalizing film is arranged in the static pressure box, one side of the static pressure box is connected with one end of an air feeding pipe through a second flange, the other end of the air feeding pipe is connected with an air outlet of an air feeding regulation device, an air inlet of the air feeding regulation device is connected with a filtering device through an air director, a polluted gas filling pipeline used for guiding polluted gas with set concentration into the air feeding pipe from the machine cabinet is arranged between the machine cabinet and the air feeding pipe, and a stainless steel flow equalizing net used for equalizing airflow is arranged on a channel between the calibration cabin and the static pressure box. The system mainly aims to achieve scientific calibration of cheap sensors, performances of cheap sensors can be improved remarkably, and cost performance of sensors can be improved exponentially.
Owner:天津中天环境科技有限公司
Superparamagnetism magnetic resonance contrast medium, and its preparing method
InactiveCN101002951AHigh crystallinityHigh saturation magnetizationEmulsion deliveryIn-vivo testing preparationsPolyolResonance
A superparamagnetic MRI contrast medium is a Fe3O4 nanoparticl coated by polyol moleculae. Its preparing process includes such steps as high-temp reaction of Fe contained compound in polyol solution, cooling, depositing, separating, dispersing it in water, filtering, and sterilizing. It has high crystalline level, high saturated magnetic intensity and high imaging effect.
Owner:HARBIN INST OF TECH
Support catalyst with active metals in atomic-scale dispersion in carrier as well as preparation method and application of catalyst
ActiveCN110252308AAvoid uneven loadLoad tightHydrocarbon from carbon oxidesCatalyst activation/preparationAfter treatmentGranularity
The invention discloses a support catalyst with active metals in atomic-scale dispersion in a carrier. The support catalyst comprises active metal species and carrier metal oxides, wherein active metals comprise one or more of Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Ru, Rh, Pd, Ag, W, Ir, Pt and Au; and the carrier metals comprise one or more of Ti, Zr, Nb, Ce, Al, Ga, In, Si, Ge and Sn. The invention furthermore discloses a preparation method and application of the catalyst. By virtue of an in-situ carrier generation method, the support catalyst with the active metals in atomic-scale dispersion in the carrier is prepared, and the catalyst is free of aggregate particles of which the granularity is greater than 1nm, of the active metal species. The supportcatalyst is low in raw material cost, simple in reaction operation and high in safety, no after-treatment step is needed, and industrial enlarged production is facilitated. Meanwhile, the application range of the catalyst is wide, and scientific researches and enlarged production for different catalytic systems are facilitated.
Owner:SHANDONG UNIV OF SCI & TECH +1
Screen-type full-perspective automatic constant temperature bee hive
Disclosed is an automatic shading cover type full-perspective constant-temperature beehive which can be manually arranged and in which motions of bee colonies can be observed in all dimensions. The automatic shading cover type full-perspective constant-temperature beehive consists of a base box, a heat-preservation insulation layer, an automatic constant-temperature device, a temperature display setter, a manual air adjusting window, beehive legs, a cover plate ring, an air vent, a beehive door hole, a feed hole, a strip-shaped hole, a bee-isolation breathable frame and a slag-falling preventive baffle plate. A transparent beehive body is mounted on the manufactured automatic constant-temperature base box, and is covered by a transparent top cover plate with an exhaust hole and by a sunshading heat-preservation outer cover after bee colonies are filled therein. By removing the outer cover, local honey and powder resources and the most beneficial temperature in the beehive for living and breeding of the bee colonies and the like can be known at anytime and anywhere. The automatic shading cover type full-perspective constant-temperature beehive is beneficial to scientific research and bee field management, can be directly used for production, meets requirements for perspective view and has the advantages of no vibration and noise, low energy consumption and convenience in use.
Owner:CHEGNGDU CHENG KE TROTHER APICULTURE COMPANY
Management information system for college staff and implementation thereof
The invention relates to a management information system for college staff and implementation thereof. The management information system adopts an Access database, is divided into a system management module, a data compiling module, a data maintenance module, a data management module, an auxiliary function module and a system help module, and can implement the functions of entering, querying, counting and printing the basic conditions of the staff, teaching information, scientific research information and action information. The physical database of the system comprises an undergraduate teaching form, a graduate teaching form, a graduate guide form, an after-school guide form, an issuing condition form, a paper publishing form, an award condition form, a research project form, an action management form, a basic condition form, an annual assessment form, a password form and a user form. The invention has the advantages of high information management speed, normalization and scientization.
Owner:白雪松
Controller design method of duct type multi-rotor mooring unmanned aerial vehicle (UAV)
ActiveCN109542110AOptimizing Control ParametersHigh control reliabilityAttitude controlPosition/course control in three dimensionsElement analysisControl system
The invention relates to a controller design method of a duct type multi-rotor mooring UAV, belongs to the field of control algorithms, and aims at solving the problem that a UAV controller is low incontrol capability and anti-interference capability due to the fact that a present simulation platform of a UAV control system is incapable of optimizing control parameters sufficiently. According tothe controller design method, a finite element analysis method is used, pneumatic characteristic parameters of the total structure of the duct type multi-rotor mooring UAV is analyzed, a dynamic modelof the UAV is established and distribution values for tension control of different motors are obtained according to the pneumatic characteristic parameters, and the pneumatic characteristic parameters are measured; the established model is combined with the measured pneumatic characteristic parameters to establish a control simulation platform of a duct type mooring UAV control system is established in the simulink environment; and a fuzzy PID controller is used to design the duct type mooring UAV control system with mooring cables, and the parameters are improved.
Owner:HARBIN INST OF TECH
Fixing device and method for mounting irregular-structural-plane samples of various shapes
InactiveCN107179235ASimple structureReduce volumeMaterial strength using steady shearing forcesEngineeringScrew thread
The invention discloses a fixing device for mounting irregular-structural-plane samples of various shapes. The fixing device comprises a direction adjusting unit, wherein a flat plate is fixedly connected to the direction adjusting unit; a base is arranged on the flat plate; a bottom supporting plate is arranged in the middle of the base; the distance between the bottom supporting plate and the base is adjustable; the distance between the bottom supporting plate and the base is determined according to the height of a structural plane sample; a clamping unit is arranged on the base along a circumferential direction; the clamping unit comprises a hand wheel; the hand wheel is arranged on the base in a screw thread fit way; an upper end of the hand wheel is fixed at a lower end of a force application lever; an upper end of the force application lever is hinged to a lower end of a curved lever; an upper end of the curved lever is fixedly connected with a back end of a fan-shaped position adjuster; a clamping side plate is arranged at a front end of the fan-shaped position adjuster; an upper part of the curved lever is hinged with an upright post; a bottom end of the upright post is fixed on the base. The invention further discloses a fixing method for mounting irregular-structural-plane samples of various shapes with a shear apparatus. The fixing device and the fixing method are suitable for fixing irregular-structural-plane samples of various shapes, and are convenient for researching the anisotropy of structural planes.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
All-isotope internal standard mass spectrometry quantitation method for carnitine-based compounds
InactiveCN107436335ALow costQuantitatively accurateComponent separationMaterial analysis by electric/magnetic meansIsotopeN-Butanol
The present invention discloses a new all-isotope mass spectrometry quantitation method for carnitine-based compounds in biological samples, wherein the method is the all-isotope internal standard quantitation method for carnitine-based compounds, uses the esterification derivative of a stable isotope labeled n-butanol reagent and a carnitine-based compound standard substance as a quantitative internal standard, and uses liquid chromatography-tandem quadrupole mass spectrometry as a detection method. According to the present invention, the method can simultaneously perform the quantitative analysis on all the carnitine-based compounds, has advantages of accurate qualitation, accurate quantitation, high throughput and low cost, can overcome the disadvantages of high interference, inaccurate quantitation, requirement of a large amount of expensive deuterium-labeled carnitine-based compound standard substances and the like of the current carnitine-based compound test, can significantly improve the accuracy of neonatal screening, clinical diagnosis of suspected metabolic diseases and scientific research, and other detections, and has important application value.
Owner:上海谱领生物科技有限公司
High-energy accelerator CT rock mechanics test system
ActiveCN109580365AReflect heterogeneityReflect continuityMaterial strength using tensile/compressive forcesMaterial analysis by transmitting radiationTest sampleHigh energy accelerator
The invention belongs to the technical field of mechanics test devices, and specifically relates to a high-energy accelerator CT rock mechanics test system. The high-energy accelerator CT rock mechanics test provided by the invention comprises a mechanics test machine, a high-energy accelerator CT ray source and a detector, the mechanics test machine is arranged between the high-energy acceleratorCT ray source and the detector, the mechanics test machine comprises a fixed component, a rotary apparatus and a pressure chamber, the rotary apparatus is arranged on the fixed component, the pressure chamber is connected with the rotary apparatus, and when a test is executed, the pressure chamber can rotate relative to the fixed component under driving of the rotary apparatus. The test machine is provided with the rotary apparatus, and when the test is executed, the pressure chamber is driven by the rotary apparatus to rotate, namely, a test sample can be scanned in a process in which a loadtest is executed for the test sample, consequently, CT imaging can completely reflect a structural state of the test sample when the test sample is loaded, and scientific researches are facilitated more.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Experiment incubator capable of measuring depositional physicochemical parameters
InactiveCN101984039ASame culture conditionsSpread evenlyBioreactor/fermenter combinationsBiological substance pretreatmentsEngineeringCirculating pump
The invention discloses an experiment incubator capable of measuring the depositional physicochemical parameters. The experiment incubator contains a box body. The experiment incubator is characterized in that the inside of the box body is provided with a plurality of sediment culture tubes; the upper and lower ends of each sediment culture tube are separately provided with a sealing plug, a liquid inlet pipe and a liquid outlet pipe penetrate through each sealing plug on the upper end, the lower end of each liquid outlet pipe extends in the culture solution of one sediment culture tube, the liquid outlet pipe of the sediment culture tube is communicated with the liquid inlet pipe of an adjacent sediment culture tube through a connecting duct; one connecting duct is provided with a miniature circulating pump used for driving the culture solution to flow circularly; and at least one sediment culture tube is provided with a multi-parameter electrode used for measuring the depositional physicochemical parameters. The advantage of the experiment incubator is as follows: the experiment incubator can be used for thermostatic culture and experimental measurement, thus the related scientific experiment and data monitoring can be performed and the environmental monitoring and scientific research can be facilitated.
Owner:NINGBO UNIV
Spiral machine for dedusting root of red-rooted salvia
The invention relates to a spiral machine for dedusting root of red-rooted salvia, and belongs to agricultural machines. The spiral machine for dedusting the root of red-rooted salvia comprises a box body, wherein a hair brush roll is arranged above the box body; a roller with an inner cylinder and an outer cylinder is arranged between two supports and is positioned above the box body, and the inner cylinder is in a meshed shape; the roller is arranged on a riding wheel and is driven by the riding wheel; a feeding hole corresponding to the inner cylinder is formed at the right end of the roller; a circular-arc-shaped discharge hole and a circular-arc-shaped dust outlet which are fixed in the box body are formed in the left side of the roller; the discharge hole is positioned between the inner cylinder and the outer cylinder, and the dust outlet is formed below the outer cylinder; spiral lines which are propelled towards the discharge hole and the dust outlet are arranged on the inner wall of the inner cylinder and the inner wall of the outer cylinder; and the hair brush roll and the riding wheel are driven by a power mechanism. The spiral machine for dedusting the root of red-rooted salvia can solve the problems of low efficiency and damage to root of red-rooted salvia plants in the process of removing impurities in the conventional mode effectively.
Owner:INST OF AGRO FOOD SCI & TECH SHANDONG ACAD OF AGRI SCI
Detecting protein of transcriptional factor through probe of digestion FRET marke nucleic acid of nuclease
InactiveCN1727895AEfficient analysisEfficient comprehensive analysis and detectionMicrobiological testing/measurementChemiluminescene/bioluminescenceRegulation of gene expressionNucleic Acid Probes
A method for detecting transcription factor protein by nucleic acid probe with nuclease protection PRET label includes preparing fluorescence labeled nucleic acid probe, carrying out combination reaction of nucleic acid probe with transcription factor protein, adding nuclease in combination reaction system to carry out enzyme nick reaction and detecting reaction system by fluorescence to reflect expression and activation level of transcription factor protein.
Owner:王进科 +1
Observation and density measurement method for glandular hairs on Artemisia annua leaf surfaces
InactiveCN101975780ASimple methodLow equipment requirementsInvestigation of vegetal materialPreparing sample for investigationMeasurement costMicrotiter plate
The invention discloses an observation and density measurement method for glandular hairs on Artemisia annua leaf surfaces, comprising the following steps: taking a eugonic Artemisia annua leaf, and feeding the leaf in a centrifuge tube or a microtiter plate; successively adding petroleum ether or normal hexane, absolute ethyl alcohol or carbinol and glacial acetic acid, evenly mixing, and incubating for 5-20min at room temperature; and taking out the leaf, placing the left on a glass slide, adding a drop of double distilled water, covering a cover slip slightly, compacting by a tablet clip, and observing on an optical microscope or calculating the number of the glandular hairs so as to calculate the density of the glandular hairs. The method is simple and convenient, has low requirement on equipment, greatly simplifies the preprocessing procedure of experimental materials, can complete the whole operation within half a hour, uses a little of reagent, is non-toxic, safe and environment-friendly, lowers the measurement cost and time substantially, and can be used for high pass analysis.
Owner:HUNAN AGRICULTURAL UNIV
Detection of transcription factor protein by double chain RNA molecule with special labeling fixed to micro-plate coated by exonuclease III
InactiveCN1721547ALimit commercializationHigh Throughput Analysis CapabilitiesMicrobiological testing/measurementRegulation of gene expressionTissue extracts
Transcription factor is one important protein for gene regulation, is center of gene expression regulating passage and network, is important target of functional genome and protein block research and important target site of transcription treatment and medicine research. The present invention proposes exonuclease III digesting double stranded nucleic acid molecule coated in microporous plate and containing special marker to detect transcription factor protein. The process of analyzing transcription factor expression and activation level includes the following steps: preparing nucleic acid; fixing the nucleic acid molecules to the pores of the microporous plate; incubation of cell or tissue extract containing transcription factor in the plate; incubation of exonuclease III reaction liquid in the plate; incubation of specific conjugate with special marker on nucleic acid on the plate; detecting and analyzing the specific conjugate to obtain the expression and activation level.
Owner:王进科 +1
Plasma generating device and method for generating plasmas
InactiveCN101835335AAvoid performance impactSimple processPlasma techniqueAtmospheric pressureHigh pressure
The invention provides a plasma generating device and a method for generating plasmas, wherein the plasma generating device concretely comprises a closed vacuum chamber, a semi-closed cathode cavity, an anode metal plate and a negative high voltage power supply, wherein the closed vacuum chamber comprises a gas inlet and a gas outlet; the semi-closed cathode cavity is positioned in the vacuum chamber, and the outer surface of the semi-closed cathode cavity is covered by an insulating medium; the anode metal plate is positioned in the vacuum chamber; the negative terminal of the negative high voltage power supply is connected with the semi-closed cathode cavity, and the grounding terminal of the negative high voltage power supply is connected with the anode metal plate; the axial line of the semi-closed cathode cavity is parallel with the anode metal plate; and when working gas is introduced into the vacuum chamber, the distance between the semi-closed cathode cavity and the anode metal plate is adjusted to enable the product of the distance and the pressure of the working gas to be greater than a local discharge threshold. The invention is used for generating local plasmas meeting requirements.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
A coryneform expression system independent of antibiotics as selection pressure
ActiveCN103834679BFacilitate scientific researchEase of industrial applicationBacteriaMicroorganism based processesMicroorganismGene engineering
Owner:JIANGNAN UNIV
Drag system for observing water transverse and longitudinal section chemical parameters
PendingCN110576954AOptimized cross sectionObservation load flexibleMeasurement devicesUnderwater vesselsMarine engineeringElectric control
The invention discloses a drag system for observing water transverse and longitudinal section chemical parameters. The drag system comprises a dragger system, an observation load system, an acquiringsystem and an electric control system. An armored cable is connected with a dragger fore body through a connecting head, and is dragged to advance in water; the dragger fore part comprises a water inlet pipe inside for acquiring water samples; wings are positioned on the two sides of a dragger, can be rotated to change angles for climbing or descending during navigation to enable the dragger to observe at a fixed depth, or can perform an up-down or left-right horizontal W type motion for 200 m water-depth longitudinal or 200 m-width transverse section chemical parameter measurement; and various chemical sensors, the acquiring system and the electric system are loaded at the middle part of the dragger after weight adding. The acquiring system is used for acquiring data of the chemical sensors and the water samples, which are sent to a ship deck through the special-machined armored cable. The electric control system can adjust attack angles of the wings according to depths and dragger postures to determine navigation depths and trajectories.
Owner:SECOND INST OF OCEANOGRAPHY MNR +2
Combination storm resisting stable ocean platform
InactiveCN103057669AImprove the development effectSafeguarding Marine Rights and InterestsMachines/enginesEngine componentsSurface oceanMarine engineering
Owner:TIANJIN GELINSEN TECH CO LTD +2
Compact type high-power hollow cathode discharge device
InactiveCN105764225AMeet the needs of useImprove conversion efficiencyElectric discharge tubesPlasma techniqueControl powerEngineering
The invention discloses a compact type high-power hollow cathode discharge device which comprises a sealing tube, a hollow cathode tube, a cathode plate, a first insulation plate, an auxiliary anode plate, an insulation tube, permanent magnets, an annular anode plate, a third water cooling channel and a control power source. The hollow cathode tube is mounted on the cathode plate. The sealing tube is connected with the cathode plate, and the hollow cathode tube is sleeved with the sealing tube. A gas input opening is further formed in the top of the sealing tube. The first insulation plate is used for achieving insulation of the cathode plate and the auxiliary anode plate. The insulation tube is arranged on the first insulation plate. The permanent magnets and the third water cooling channel are both arranged outside the auxiliary anode plate. The distance between the annular anode plate and the bottom of the auxiliary anode plate ranges from 30 cm to 50 cm. The control power source is connected with the cathode plate, the auxiliary anode plate and the annular anode plate. The compact type high-power hollow cathode discharge device is simple in structure, high in power, wide in parameter section of plasma and capable of being applied to wider-range scientific research and industrial application.
Owner:MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
Measuring method and measuring apparatus for urban heat island strength
InactiveCN101587195AEasy to measureAccurate measurementClimate change adaptationInstrumentsWeather factorMeasurement device
The invention relates to a measuring method and a measuring apparatus for the urban heat island strength, which considers the influence of at least three weather factors such as horizontal total wind speed, wind direction and air temperature to the measuring result of the urban heat island strength, applies the historical observation data of the city to be researched for establishing a data analysis process apparatus, and observes the observed result of the specific weather factors such as horizontal total wind speed, wind direction and air temperature of the city to be researched so as to correctly measure the urban heat island strength and provide a certain technology support for the weather study and atmosphere science.
Owner:NANJING UNIV +1
Fluid energy turbine machine
The invention discloses a new energy power machine, and particularly relates to a fluid energy turbine machine, which is provided with an existing or improved cylinder and piston turbine machine body, has or does not have a connecting rod and crank mechanism, is additionally provided with an improved piston, a fluid inlet supercharging structure, a fluid drainage decompressing structure, a steam pressure conversion output and an output pressure adjusting structure, independently or integrally uses energy in fluid work media in various energy states, and converts the energy into mechanical energy or energy in other forms so as to work continuously. The existing or improved cylinder and piston turbine machine body absorb the energy of fluid in various energy states and realizes steam pressure conversion, and is a core for connection and energy output of other various structures. The additional improved piston absorbs energy of a fluid hammer. By the aid of the fluid inlet supercharging structure and the fluid drainage decompressing structure, fluid entering a fluid work cylinder rotates to generate supercharging vortex, and fluid drained from the fluid work cylinder rotates to generate homodromous decompression vortex. A vertical steam pressure conversion structure leads fluid to be drained out of the turbine machine body smoothly after the fluid finishes acting by the aid of steam pressure conversion.
Owner:朱剑文
Duct type multi-rotor tethered drone and control system thereof
ActiveCN109131863AReduce aerodynamic noiseImprove securityFor captive aircraftsRotocraftFiberMotor drive
The invention relates to a duct type multi-rotor tethered drone and a control system thereof, belongs to the field of drones, and aims to solve the problems that existing drones are short in flight duration and prone to crash due to the fact that the rotors of the drones are exposed. The duct type multi-rotor tethered drone is characterized in that the an inner central pipe is connected with an outer duct pipe through a group of guide vanes, a group of carbon fiber pipes is fixedly mounted on the outer wall of the lateral side of a block formed by central plates, the middle section of each carbon fiber pipe is fixed with the wall of the duct pipe, and an auxiliary rotor is mounted at the tail end of each carbon fiber pipe through an auxiliary motor; a hardware control system is mounted onthe upper surface of the central plate block, a main motor is coaxially mounted on the lower surface of the central plate block, the main motor drives a main rotor, and a power supply system is arranged beside the main motor; the hardware control system is connected with the main motor, a group of auxiliary motors, the power supply system, a video collecting unit and an automatic pilot, and a tether is connected with the hardware control system, the main motor, the group of auxiliary motors and the video collecting unit through the power supply system. The duct type multi-rotor tethered dronecan constantly work around the clock.
Owner:HARBIN INST OF TECH
Permeability test experimental system of low-permeability clay
ActiveCN108344676APrecise head difference changeReliable results from the initial hydraulic gradientPermeability/surface area analysisData acquisitionHigh pressure water
The invention provides a permeability test experimental system of low-permeability clay, and belongs to the field of geotechnique clay permeability tests. The system comprises a water head supply unitcapable of supplying tiny water heads and high-pressure water heads, a sample treatment unit for clamping and pressurizing samples, a water supply and storage unit for providing percolating fluid andcollecting the fluid, a data acquiring and processing unit for acquiring and processing experimental data, and an incubator for controlling experimental environments. According to the system, the principles of variable water heads and constant water heads of the geotechnique permeability tests are combined, the modern data acquisition technology is introduced, and the test precision is effectively improved. On the aspect of scientific research, a device can provide temperatures, loads and water head differences to be used as variables, when low-permeability clay samples with different water contents are provided, the water contents can serve as variables for permeability research of the samples, and application of conversion between the constant water heads and the variable water heads can be carried out. On the aspect of engineering parameter requirements, the device can adopt the high-pressure variable water heads to test the permeability coefficient of the low-permeability clay, and the experimental time is effectively shortened.
Owner:JILIN UNIV
Primers for detecting hot-spot mutation sites of KRAS gene, kit and PCR (polymerase chain reaction) method for primers or kit
ActiveCN104862401ADifficulty of SimplificationReduce errorsMicrobiological testing/measurementDNA/RNA fragmentationKRASMedicine
The invention discloses primers for detecting hot-spot mutation sites of a KRAS gene, a kit and a PCR (polymerase chain reaction) method for the primers or the kit. The primers and the kit include a wild-type specific upstream primer, a specific upstream primer of a Gly12Asp mutation site, a specific upstream primer of a Gly12Ala mutation site, a specific upstream primer of a Gly12Val mutation site, a specific upstream primer of a Gly12Ser mutation site, a specific upstream primer of a Gly12Arg mutation site, a specific upstream primer of a Gly12Cys mutation site, a specific upstream primer of a Gly13Asp mutation site and a downstream primer shared by the wild-type specific upstream primer and a mutant-type specific upstream primer. The kit has the advantages of simplicity, quickness, accuracy and low price for detection and the like, and provides a powerful tool for scientific research and clinical analysis of the hot-spot mutation sites of the KRAS gene.
Owner:沈阳优吉诺生物科技有限公司
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