How to Good outline patent retrieval - Eureka

Multi-temporal high-resolution remote sensing image building extraction method based on multi-feature LSTM network

ActiveCN111582194AAccurate extractionGood outlineImage enhancementImage analysisConditional random fieldGabor wavelet transform

The invention discloses a multi-temporal high-resolution remote sensing image building extraction method based on a multi-feature LSTM network, and belongs to the technical field of satellite remote sensing image processing and application. The method aims to solve the problems of low accuracy, high error rate, fuzzy boundary and the like of a building extraction result of an existing method. According to the invention, a plurality of multi-temporal high-resolution No.2 remote sensing images are used as data sources; building spectral characteristics are extracted by using a method based on HSI color transformation; based on a method of combining graph segmentation and conditional random field post-processing, shape features of a building are extracted, based on a Gabor wavelet transform method, texture information features of the building are extracted, and based on a DSBI index method, index features of the building are extracted. A building characteristic set with 60 characteristicwave bands is formed by the extracted spectrum, shape, texture and index characteristics of the multi-temporal building, a manufactured building sample and a label are sent into an LSTM network to obtain a building coarse extraction result, and a final result is obtained after morphological processing.

Multi-temporal high-resolution remote sensing image building extraction method based on multi-feature LSTM network

View all

Owner:JILIN UNIV

Valve pair sealability detection device and method

PendingCN108225682AShort timeObserve intuitivelyDetection of fluid at leakage pointMeasurement of fluid loss/gain rateVacuum pressureEngineering

The invention relates to a valve pair sealability detection device and method. The device comprises a detection platform, a leakage observation chamber, a vacuum pressure meter, a pressure maintainingvalve and a vacuum pump, the detection platform is communicated with the leakage observation chamber through a pipeline, a detected valve pair is mounted on the detection platform and communicated with the pipeline through a detection platform air suction port, bubble observation liquid is filled in the leakage observation chamber, and liquid level of the bubble observation liquid is higher thanan observation box air suction port formed at a position where the pipeline is connected with the leakage observation chamber; the leakage observation chamber is connected with the vacuum pressure meter and the pressure maintaining valve through a pressure meter three-way joint, liquid level of the bubble observation liquid is lower than an observation box air exhaust port formed at a position where the leakage observation chamber is connected with the pressure meter three-way joint and the detection platform air suction port, and the pressure maintaining valve is connected with the vacuum pump. By the valve pair sealability detection device and method, sealability detection accuracy, detection efficiency and detection standards of the valve pair for an oil pump can be improved, and sealability quality of the valve pair is improved.

View all

Owner:SICHUAN AOWEI OIL EXTRACTION EQUIP CO LTD

Low-profile electrolytic copper foil for high-density interconnected circuit board

ActiveCN112469194AHigh strengthGood high temperature oxidation resistanceElectrolytic inorganic material coatingPrinted circuit aspectsRough surfaceElectrolysis

The invention relates to the field of copper foils, and particularly relates to a low-profile electrolytic copper foil for a high-density interconnected circuit board. The electrolytic copper foil sequentially comprises a copper foil layer, a roughening treatment layer, a protective barrier layer, a passivation layer and a silane coupling agent layer, wherein the thickness of the copper foil layeris 6-35 [mu]m, the weight per unit area is 50-30 g/m<2>, the weight deviation per unit area is less than 5%, the tensile strength is not less than 350 N/mm<2> at the temperature of 25 DEG C, , the elongation is not less than 4% at the temperature of 25 DEG C, the peel strength is not less than 0.7 kg/cm, the smooth surface Ra is not more than 0.43 [mu]m, and the rough surface Rz is not more than3.5 [mu]m. The electrolytic copper foil provided by the invention is simple in raw material, non-toxic, harmless, safe and environment-friendly, has excellent normal-temperature tensile strength and high-temperature tensile strength, can tolerate the high temperature of 200 DEG C, can meet better flatness and low profile tolerance, is simple to operate, can completely meet the requirements of themarket on the electrolytic copper foil for the high-density interconnected circuit board, is high in additional value, and wide in environment applicability, and has the obvious market competitiveness.

View all

Owner:GUANGDONG FINE YUAN SCI TECH CO LTD

Screw elements and method for manufacturing screw elements

InactiveCN105268974ALow costImprove distributionAdditive manufacturing apparatusRotary stirring mixersLight beamEngineering

A production method for screw elements (1) with a screw body (3) with an axially through-opening (5) with internal gearing (7) for mounting on a support shaft and an outer contour (9) for closely meshing twin-shaft extruders. A metallic powder material (13) is arranged step by step in layers in the direction of a production axis (Z-Z) on a work platform (11), wherein a laser beam (19) for each layer of the screw element (1) irradiates the powder material (13) according to the data of a three-dimensional model in a specific irradiation sequence at specific sites of the layer. The powder material (13) is melted, fully in places, and bonded with the directly underlying layer, so that after hardening of the layers, a complete, stable screw body (3) is produced. Further, the invention relates to a screw element produced in this way.

Screw elements and method for manufacturing screw elements

View all

Owner:CARL AUG PICARD

Polishing method for compressor blades of small and medium-sized aero-engines

ActiveCN113070789AImprove cycle fatigue lifeGood outlineGrinding machinesPolishingEngineering

The invention discloses a polishing method for compressor blades of small and medium-sized aero-engines, which comprises the following steps of: dividing blade polishing areas, dividing a blade profile into a plurality of polishing areas, determining a polishing track and selecting a polishing tool; selecting polishing parameters of different areas, and determining the different polishing parameters according to the space shapes, the space sizes and the machining allowances of the different areas of the blade; performing polishing method verification: performing polishing method verification on the obtained polished blade according to the polishing area, the polishing track and the polishing parameters, and comparing the obtained polished blade with a manually polished blade; determining a polishing method, and correcting polishing area division, polishing tracks of all areas and polishing parameters of all the areas in combination with a verification test; and according to the corrected polishing area division, the polishing track of each area and the polishing parameters of each area, conducting polishing on the compressor blades of the small and medium-sized aero-engines.

View all

Owner:CHINA HANGFA SOUTH IND CO LTD

Active light hand-held target and cooperation mark point identification method thereof

ActiveCN106595483AAvoid lossRigid constraints are goodImage enhancementImage analysisHand heldEngineering

The invention discloses an active light hand-held target and a cooperation mark point identification method thereof. The active light hand-held target comprises a target main body, a wireless switch controller, a handle, a light modifying plate, a diffuser plate, a light source aluminium substrate, and a measuring head. The wireless switch controller is disposed above the handle. The light modifying plate is disposed inside the light modifying plate groove of the target main body. The diffuser plate is fixedly adhered to the surface of the light modifying plate. The light source aluminium substrate is fixed on the back of the target main body. The handle is disposed on the back of the light source aluminium substrate. The measuring head is fixed at the tail of the target main body. The light modifying plate is equipped with a plurality of light-transmitting circular holes that are taken as cooperation mark points, an active light source is disposed on the light source aluminium substrate to correspond to each cooperation mark point, and the diffuser plate is provided with light equalizing films that correspond to the cooperation mark points. The active light hand-held target is convenient to use, is wide in viewing angle and usage scope, and is also high in detection precision.

Active light hand-held target and cooperation mark point identification method thereof

View all

Owner:JIANGSU JITRI HUST INTELLIGENT EQUIP TECH CO LTD

Slurry composition and use thereof

ActiveCN103087637ALower grinding temperatureImprove stability and reliabilityOther chemical processesLapping machinesSolventPolymer chemistry

The present invention provides a slurry composition and use thereof. The total amount of the slurry composition is 100wt%. Furthermore the slurry composition comprises grinding particles and a solvent. The content of the grinding particles is between 30wt% and 60wt%. Furthermore true ball factor of the grinding particles is 0.9-1.0. The content of the solvent is between 40wt% and 70wt%. The grinding composition can greatly reduce the grinding temperature.

View all

Owner:FERRO CORP

Manhole cutting auxiliary tool suitable for different round covers

InactiveCN108453342AImprove cutting accuracyWell contoured manholeGas flame welding apparatusInstallation ErrorEngineering

The invention discloses a manhole cutting auxiliary tool suitable for different round covers. The manhole cutting auxiliary tool comprises a bottom plate. The upper end of the bottom plate is providedwith a rotating base. The rotating base is internally provided with a rotating shaft. The upper end of the rotating shaft is fixedly provided with a sliding platform. The two ends of the sliding platform are provided with lead screw bases. The lead screw bases are internally provided with a bi-directional lead screw. The bi-directional lead screw is located in the sliding platform. The center ofthe bi-directional lead screw coincides with the center of the rotating base. The bi-directional lead screw is provided with two centrosymmetric sliding bases. The sliding bases are fixedly provided with upper supporting plates. The sides, facing the center of the bi-directional lead screw, of the upper supporting plates are provided with two supporting rods. The supporting rods are symmetric withrespect to the length direction of the bi-directional lead screw. The upper ends of the supporting rods are provided with positioning rods. The bottom plate is provided with an L-shaped support. Thefront end of the support is provided with a burning torch positioning hole, and the distance between the burning torch positioning hole and the center of the bi-directional lead screw is the radius ofa manhole. Compared with the traditional cutting method, the manhole cutting auxiliary tool has the beneficial effects of being high in cutting precision, the profile tolerance of the manhole is good, the following manhole cover installation error is small, and meanwhile the manhole cutting auxiliary tool is suitable for cutting operation of different sizes of water tank covers.