Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

74results about How to "Good edge" patented technology

Fuzzy clustering image segmentation method with plane as clustering center and anti-noise ability

The invention discloses a fuzzy clustering image segmentation method with plane as clustering center and anti-noise ability. The method comprises the following steps: firstly, defining an objective function, initializing various coefficients and thresholds in the objective function, and randomly initializing a membership matrix; minimizing the objective function to calculate and update the coefficients and fuzzy membership matrices of the clustering plane. calculating the value of the objective function based on the updated fuzzy membership matrix, when the absolute value of the difference between the objective function values of the two successive iterations is less than the termination condition or the method exceeds the maximum iteration number limit, the iteration ends, otherwise, theiteration continues to perform the updating, and each pixel point is classified and marked according to the criterion of the maximum membership, so as to complete the initial classification; The edgeof the image is extracted from the classification result, and the local window is selected to divide the membership degree again with the edge point as the center pixel. According to the fuzzy membership matrix of clustering output, the membership degree of data points belonging to a certain class is obtained, and each data point is classified and marked according to the maximum probability principle, and the image segmentation is completed. The method of the invention uses a clustering plane instead of a clustering center for image segmentation, can simultaneously consider the gray value information and the position information of pixels, obtains an ideal image segmentation effect, eliminates the influence of noise well, and improves the quality of image segmentation and the stability ofthe segmentation effect.
Owner:SHANDONG UNIV

Method of manufacturing of cutting knives using direct metal deposition

Direct metal deposition (DMD) is used to fabricate knife edges with extended service life. A metal alloy powder is deposited along a blank and melted with a laser beam so that the powder solidifies into a strip of material having a hardness and / or wear resistance greater than that of the starting material. The piece is then finished to produce a sharp edge in the solidified material. The powder may be melted while it is being deposited, or it may be melted after being deposited. A slot or groove may be formed in the blank with the metal alloy powder being deposited into the slot or groove. A hardened steel alloy powder is deposited onto a mild steel blank. For example, a tool steel or vanadium steel powder may be deposited onto a 1018 steel blank. An invention line-beam nozzle may be used for deposition and / or powder melting.
Owner:THE P O M GROUP

Braze welding nickel base impregnated diamond bit for deep part solid rock drilling, and manufacturing method of braze welding nickel base impregnated diamond bit

The invention discloses a braze welding nickel base impregnated diamond bit for deep part solid rock drilling, and a manufacturing method of the braze welding nickel base impregnated diamond bit. A braze welding nickel base body mixture of the braze welding nickel base impregnated diamond bit is formed by sintering a nickel base casing, a thin metal wire and diamond, the diamond is impregnated into the sintering nickel base casing, the content of diamond accounts for 30 to 80 percent by volume, and the granularity is 35 / 60 mesh; the sintering nickel base casing comprises the following components in mass percent: 35 to 75 percent of nicochrome powder and 25 to 35 percent of iron powder; the diameter of the thin metal wire is 1.0 to 1.6 mm; a nickel base prealloyed brazing filler metal is used, the performance of a drill bit is improved greatly, the sintering temperature is lowered, and the diamond damage degree is lowered; the content of the iron powder is higher, and the cost of the drill bit is lowered; the thin metal wire is embedded, so that the abrasive resistance of the casing is lowered and diamond exposure and drilling hole deviation preventing are facilitated. The braze welding nickel base impregnated diamond bit provided by the invention is particularly suitable for deep part solid rock drilling, and is also suitable for shallow slippery formation drilling.
Owner:LIAONING UNIVERSITY OF TECHNOLOGY

Method for classifying polarimetric SAR (synthetic aperture radar) images on the basis of Freeman decomposition and spectral clustering

ActiveCN102999762AOvercome the disadvantages that the classification results have a large impact and are difficult to selectGood edgeCharacter and pattern recognitionMean-shiftDecomposition
The invention discloses a method for classifying polarimetric SAR (synthetic aperture radar) images on the basis of Freeman decomposition and spectral clustering and mainly solves the problem that the existing unsupervised polarimetric SAR classification method is low in classification precision. The method includes the steps of subjecting each pixel to Freeman decomposition, and extracting volume scattering power, dihedral angle scattering power and surface scattering power of each pixel; applying the scattering powers and a coordinate of the pixel as input feature vectors of Mean Shift algorithm, and segmenting images by the Mean Shift algorithm to obtain M regions; selecting representative points of the M regions as input points for spectral clustering, subjecting each region to spectral clustering to obtain results of image pre-classification; and finally subjecting a whole image obtained by pre-classification to iterative classification through a Wishart classifier so as to obtain final classification results. Experimental results show that classification of the polarimetric SAR images by the method is better, and the method is applicable to unsupervised classification of various polarimetric SAR images.
Owner:XIDIAN UNIV

Longitudinal Support Device for Supporting a Front Engine in a Motor Vehicle

ActiveUS20170137064A1Same effectivenessWithout impairing effectivenessUnderstructuresSuperstructure subunitsEngineeringMechanical engineering
An engine support device, which is provided for supporting an engine arranged in a front-end vehicle structure of a motor vehicle, includes a first half-shell with a first end section, a second end section opposite same and a first lateral cheek section, and a second half-shell with a third end section, a fourth end section opposite same, a middle section arranged between the third and the fourth end section and a second lateral cheek section. The first half-shell as an outer shell and the second half-shell as an inner shell can be provided in a state of the engine support device installed into a motor vehicle. The first lateral cheek section has substantially straight edges in a continuous manner from the first end section thereof to the second end section thereof. The second lateral cheek section has substantially straight edges in a continuous manner from the third end section thereof to the middle section thereof and has a first offset in the direction of the first lateral cheek section between the middle section and the fourth end section and converges on the first lateral cheek section in a first longitudinal section containing the offset by a difference in distance which corresponds to the first offset. The second lateral cheek section is arranged on the first lateral cheek section at least in the fourth and the second end sections, respectively.
Owner:BAYERISCHE MOTOREN WERKE AG

Melt casting type diamond drill bit

The invention provides a melt-casted diamond drill bit, belonging to the superhard material cutting tool technical field. The technical proposal of the invention is capable of producing melt-casted diamond core drill, diamond geological drill, diamond deep well drill, etc. compared with sintered diamond drill bit, the melt-casted diamond drill bit has manufacturing accuracy several times higher, and is wear resistant and sharp; compared with galvanized drill bit and brazed diamond drill bit, the melt-casted diamond drill bit has lower manufacture cost and longer service life; compared with dry drill, the abrasion resistance of the melt-casted diamond drill bit is several times higher; thereby, the melt-casted diamond drill bit is applicable for various drilling work, such as the drilling work in marbles, glasses, bituminous road surfaces, concrete road surfaces, reinforced concrete engineering components, and even in hard granitoid, and even harder and more brittle silicon crystal.
Owner:于贵生

Laser trimming device and method for superhard abrasive forming grinding wheel

The invention discloses a laser trimming device and method for a superhard abrasive forming grinding wheel. The device is sequentially provided with a reflection lens clamp, a reflection lens base, ahorizontal displacement adjusting table, a vertical displacement adjusting frame and a fixed support along the laser beam emitting direction; and is provided with a constant-angle rotating knob, a displacement lead screw and acoustic emission equipment. The device is a three-degree-of-freedom reflecting lens carrying device which can move in the x direction, the y direction and the z direction androtate around the axis; and a reflecting lens is regulated and controlled to reflect an emergent laser beam at a nearly vertical angle, so that laser energy acts in the horizontal direction and the vertical direction at the same time, and the shaping efficiency is improved by times. A method for coating a laser cross section by the lens clamp is designed, and a modification method for increasingthe laser scanning times in an odd number is provided, so that high modification efficiency and good grinding wheel outline appearance are ensured, and high speed and energy conservation are realized;and a model for sharpening a scanning track of a laser beam on the surface of the grinding wheel is established, and a method for controlling the optimal scanning times and performing layered laser scanning sharpening is provided, so that the effects that abrasive particles are excellent in edging and high in percent of pass are achieved.
Owner:HUNAN UNIV OF SCI & TECH

A liver automatic segmentation method of abdominal CT sequence images based on a level set and a shape descriptor

ActiveCN108986114AOptimizing Liver MarginsImproving Liver Segmentation AccuracyImage enhancementImage analysisNoise pollutionAbdominal ct
The invention discloses a liver automatic segmentation method of abdominal CT sequence images based on a level set and a shape descriptor. The method includes: preprocessing an input image, and removing irrelevant organs and tissues; in combination with the gray shift field, constructing a level set energy function by using the correlation between adjacent slices of an abdominal CT sequence, and completing the automatic liver segmentation of abdominal CT sequence images by iterative strategy with the initial slices as the starting point; constructing the local and global shape descriptors to remove the over-segmented region and optimize the liver edge. The method of the invention can effectively segment liver regions in abdominal CT sequence images which are seriously polluted by noise andhave gray heterogeneity, can effectively avoid missegmentation of adjacent tissues around the liver, remove over-segmented regions caused by gray overlap, and improve liver segmentation accuracy.
Owner:湖南提奥医疗科技有限公司

Polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material and preparation method and application thereof in 3D printing consumables

The invention discloses a polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material and a preparation method and application thereof in 3D printing consumables, which belong to the technical field of 3D printing. The material comprises the following raw material components in parts by mass: 60-90 parts of polylactic acid, 3 to 20 parts of polylactic acid-based thermoplastic polyurethane, 1-5 parts of an inorganic filler, 1-5 parts of a cross-linking agent, and 0.2 to 1 part of a stabilizing agent. The structural general formula of the polylactic acid-based thermoplastic polyurethane is shown in the specification, and a group R1 in the structural general formula is selected from polyalkyl ether, the group R2 is selected from one of straight-chain hexyl ormethane diphenyl, and the mesh number of the inorganic filler is 3000 to 5000 meshes. The composite material is good in 3D printing performance and high in printing precision.
Owner:XIAOGAN ESUN NEW MATERIAL +1

Digital light processing 3D printing device and method based on nonlinear focusing multi-partition exposure

The invention discloses a digital light processing 3D printing device and method based on nonlinear focusing multi-partition exposure. According to the device, a stepping servo motor and a planetary reducer are mounted on the side face of a focusing stop of a DLP projector to serve as an electric focusing system, and a synchronous belt serves as a transmission device so as to control precise focusing of the projector stop. Partitioned multi-exposure curing of the DLP projector is controlled by a control mainboard. In the device, a high-resolution electric focusing mechanism is additionally mounted to achieve the aims of light source focal point changing and uniform curing during exposure curing. Meanwhile, the device can achieve the aims of reducing shrinkage, improving part edge strengthand therefore improving forming quality through nonlinear focusing multi-partition exposure during curing. The invention mainly relates to a multi-exposure intelligent 3D printer for additive manufacturing, in particular to a projector capable of achieving automatic and continuous focusing and exposure and a partition multi-exposure function.
Owner:SOUTH CHINA UNIV OF TECH

Diamond drilling bit with a plurality of sets of serrated structures automatically formed by weakened matrix with order positioning and manufacture process

The invention discloses a diamond drilling bit with a plurality of sets of serrated structures automatically formed by weakened matrix with order positioning. The diamond drilling bit with a pluralityof sets of serrated structures automatically drill teeth formed by weakened matrix with order positioning comprises drill teeth and a steel body. The drill teeth are composed by working layer sheetswith the thickness of 0.2-1.5mm and interlayer sheets with thickness of 0.2-1.5mm. The working layer sheets are made from metal powder, tungsten carbide powder and diamond, and the interlayer sheets are made from graphite powder, ceramic powder and copper-tin alloy powder. Organic solvents are separately added for preparing slurry materials, and the slurry materials are poured to form a mold, andafter vacuum baking and low-temperature sintering, a sheet blank is formed; the weakened matrix particles are positioned and arranged orderly according to the designed concentration and are embedded in the predetermined position of the working layer sheet blank; and the working layer sheets and the interlayer sheets are alternately packed into a graphite mold at intervals to form the drill teeth,then the steel body is installed, and after hot pressed sintering, the drilling bit is formed. During the drilling process of the diamond drilling bit, a pie appears in a working lip face, at the sametime, the interlayer sheets are subjected to advanced abrasion, then a groove appears, and a working face of the drilling bit form a serrated shape; and during drilling, the exposure is fast, the efficiency is high, and the energy consumption is low.
Owner:CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products