74 results about "Radial gradient" patented technology

The invention provides a large diameter aspheric measuring device based on ultra-precision rotary scan and a method, belongs to the macroscopic measuring technology. The device comprises an ultra-precision air flotation turntable, a precision angle and angle measuring system, an ultra-precision linear air flotation guide, a length-measuring device and a gradient measurement system. The gradient measurement system comprises a linear polarization He-Ne laser or a semiconductor laser, a diffraction element, a scanning head and an image receiving unit. The linear polarization He-Ne laser or the semiconductor laser and the image receiving unit are separately fixed on the two sides of the base beam. The scanning head is fixed on the ultra-precision linear air flotation guide. The scanning head comprises a radial gradient measurement sub-scanning head and a tangential gradient measurement sub-scanning head, both of which comprise an error compensation light path. The working platforms of the two sub-scanning heads are orthogonal to each other. The invention discloses a large diameter aspheric measuring method based on ultra-precision rotary scan.

The present invention discloses a radial gradation double air regulation cyclone coal powder burner, including nozzle with burner, internal first air channel, external first air channel, internal second air channel, external second air channel, internal tooth profile combustion-stabilizing ring, external tooth profile combustion-stabilizing ring, double-cone flare, stopper coal powder concentrator and central pipe cyclone coal powder burner. It utilizes two air channels to implement radial gradation combustion.

The invention discloses a vector graph filling method for a mobile terminal and comprises the following steps of: acquiring the information Grid (Xi) on the intersection point of edges of the polygon of the vector graph and pixels, and storing coordinates Yi on the Y axis into a linked list Grid Row (Yi) in turn; performing filling process, processing the Grid Rows related to the polygon in turn according to an ascending order of Y coordinates, wherein the step contains two parts, one is performing an anti-aliasing calculation on the intersection pixels of opposite edges and a scanning line and filling a proper value, the other is filling the internal area of the polygon on the scanning line, wherein the fill process can be a solid fill process, a linear gradient fill process or a radial gradient fill process. Compared with an active side filling method and a scanning line seed filling method, the vector graph filling method of the invention is more suitable for the display of a mobile terminal screen; besides, the vector graph filling method takes less time, has a high efficiency and supports a complex self crossing polygon filling process.

The invention provides a special fixture used for processing an open slot on a spatial dihedral angle slope of a turbine blade, and the special fixture is characterized by comprising a slope baseboard component capable of adjusting a radial gradient, wherein a tailstock tip component and an end face positioning component are oppositely arranged at two radial ends of the slope baseboard component; a slope cushion component which is capable of adjusting an axial gradient and a height is arranged on the slope baseboard component between the tailstock tip component and the end face positioning component; a side wall positioning component is also arranged on the slope baseboard component; the side wall positioning component can axially feed a side wall positioning element which is contained in the side wall positioning component; a clamping component is also arranged on the slope baseboard component; and a pressing head capable of feeding downward is arranged at the tail end of the clamping component. The fixture provided by the invention can firmly and accurately position a device, can quickly and efficiently process the open slot meeting a design demand on a size precision and a position precision, and has ultrahigh surface glossiness.

The invention belongs to the field of intersection of a computer technology and medical images, and in particular relates to an automatic dividing method of internal and external profiles in the cross section direction of an ultrasound image carotid artery blood vessel. The method specifically comprises the following steps of: selecting the current frame image; manually defining a reference profile point and interpolating to form a reference profile; extrapolating the reference profile to form a first interested area; automatically detecting a carotid artery profile: searching a radial gradient maximum point on a polar coordinate image obtained through conversion in a first interested area as the initial external profile point, estimating the gray probability density distribution in the first interested area by using mixed distribution, carrying out level set evolution to obtain the external profile, interpolating the external profile to form an initial internal profile and carrying out level set evolution to obtain an internal profile. By adopting the method, ultrasound carotid artery images can be effectively divided, and the workload of doctors can be reduced; and besides, the carotid artery internal and external profiles obtained through division in the method can be used for calculating the size of the carotid artery blood vessel wall and providing accurate and effective information for research of carotid atherosclerosis.

The invention discloses a medical high abrasion resistance titanium alloy composite and a gradient in-situ nano multiphase abrasion reduction medical titanium alloy 3D printing method. The physical characteristics of boron carbide ceramic and a titanium alloy are combined, a laser selective melting forming process is adopted, and under the effect of high energy lasers, active elements of carbon and boron can be conveniently diffused outwards in a radial gradient mode along boron carbide ceramic particles, and nano ceramic reinforced phases such as Ti-B, TiB2 and TiC can be easily synthesized through the carbon, the boron and the medical titanium alloy. On one hand, forming of a gradient ceramic particle/titanium alloy interface is promoted, and wettability of the gradient ceramic particle/titanium alloy interface is remarkably enhanced; and on the other hand, based on good physical properties and the uniform dispersion strengthening effect of the in-situ synthesis multiphase nano ceramic particles, the friction and abrasion characteristics of the medical titanium alloy can be effectively improved, manufacturing of the high performance medical titanium alloy is achieved, and the medical high abrasion resistance titanium alloy has good clinical application prospects and economic value.

The invention discloses an iris locating method based on radial gradient detection. The method comprises the steps of estimating the position of the center of a pupil, dividing an iris area to be searched for with the position as the reference point, and spreading the iris area to be searched for into a rectangular area with a specific size according to polar coordinates; locating the inner boundary of the iris area through the radial gradient detection method; locating the outer boundary of the iris area through the radial gradient detection method, and carrying out fine adjustment on the reference radius of the outer boundary according to the radial gradient in a neighborhood. According to the technical scheme, it is not needed to carry out pointwise three-dimensional space search on the iris boundaries within a large range or carry out self-adaptation determination on an edge detection and area segmentation complexity threshold value, disturbing influence caused by light source image points and uneven illumination is small, rapid and accurate iris locating can be achieved, and therefore the recognition speed of an iris recognition system can be increased, and the recognition accuracy of the iris recognition system can be improved.

The invention relates to a preparation method of a porous ceramic pipe with a gradient through hole structure. The preparation method is characterized in that the adopted raw materials include freezing medium tertiary butanol, ceramic powder, a dispersing agent, adhesive, a lubricating agent, and refrigerant; and the preparation method comprises the steps of mixing the raw materials based on a certain ratio; freezing and shaping; and sintering at a low temperature of -50 DEG C under an air condition without pressure, thus obtaining the porous ceramic pipe with the gradient through hole structure. The porous ceramic pipe prepared by the method provided by the invention has a radial gradient through hole structure with an axis served as the centre of a circle; and the porous ceramic pipe has the advantages of high strength, high filtration flux, and being easily cleaned. The preparation method is simple in preparation technology, has low requirements on equipment and technological conditions, and is beneficial for being popularized and used.

The invention discloses an optical fiber light trap acceleration measurement device, belonging to the fields of inertia measurement technology and optical engineering. Four optical elements in the measurement device are arranged in a cross groove of an optical fiber fixing substrate respectively; transparent solution is capsulated in the crossing position of the cross groove; the output end face of the optical element is aligned with spherical particles in the transparent solution, the distance between output end faces of two opposite optical elements is between 50 and 800 microns; output ends of four monomode optical fibers are coupled in corresponding optical elements respectively, while input ends thereof are connected with a light intensity modulator; light emitted by a laser is modulated into four beams of light with the same light intensity through the light intensity modulator, and the four beams of light are input into the four monomode optical fibers respectively; an photoelectric image detector is arranged right above the cross position of the cross groove; and the photoelectric image detector and the light intensity modulator are respectively connected with a processor. The device has the advantages of even light intensity distribution and small radial gradient force, has high measurement sensitivity, and reduces the requirement on alignment accuracy of the beam.

In situ investigation of microbial life in extreme environments can be carried out with microscopes capable of imaging 3-dimensional volumes and tracking particle motion. A lensless digital holographic microscope is disclosed that provides roughly 1.5 micron resolution in a compact, robust package suitable for remote deployment. High resolution is achieved by generating high numerical-aperture input beams with radial gradient-index rod lenses. The ability to detect and track prokaryotes was explored using bacterial strains of two different sizes. In the larger strain, a variety of motions were seen, while the smaller strain was used to demonstrate a detection capability down to micron scales.

A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit “splitting” between the resonant wavelengths supported by the TE and TM components of the LP_1m mode and the resonant wavelength supported by the odd/even HE_2m components of the LP_1m mode. Since only the TE and TM components are polarization dependent, by splitting and shifting the resonant wavelengths for these modes away from a system-desired wavelength(s) supported by the odd/even HE modes, a polarization insensitive microbend-induced fiber grating can be formed. A fiber core configuration including a central core region, trench and ring is formed to exhibit a large radial gradient in core refractive index profile, with a significantly steep transition between the ring index and the trench index, to provide the desired splitting between the (undesired, polarization sensitive) TE/TM modes and the HE mode.

The invention discloses an ART (Algebraic Reconstruction Technique) flame slice reconstruction algorithm based on radial gradient total variation (TV), comprising: preprocessing a flame image; generating a projection image; solving a reconstruction weight matrix W according to an ART criterion; reconstructing an image according to ART; solving the radial gradient and radial gradient TV of each reconstruction image; adjusting an image according to a radial TV method; and outputting a reconstruction image. Compared with the prior art, the ART flame slice reconstruction algorithm cam effectively improve flame image slice reconstruction quality and reconstruction speed; in particular, when projecting angles are less, algorithm decorrelation is better, radial gradient images are more sparse, a flame reconstruction process has high stability, and algorithm robustness is strong.

A liquid crystal lens includes a first light-pervious plate, a second light-pervious plate opposite to the first light-pervious plate, a liquid crystal layer sandwiched between the first light-pervious plate and the second light-pervious plate, a first electrode layer, a second electrode layer and a driving voltage chip. The first electrode layer includes a plurality of concentric, annular electrodes arranged on a surface of the first light-pervious plate. A material of the first electrode layer is carbon nanotube. The second electrode layer is arranged on a surface of the second light-pervious plate. The driving voltage chip is configured for providing voltages between each of the annular electrodes and the second electrode layer in radial gradient distribution. A lens module is also provided in the present invention.

The invention discloses a radial gradient load three-way catalyst and a preparation method, the catalyst comprises a carrier with a regular structure and a coating material attached on the surface of the carrier, the coating material presents gradient load along the radial direction of the carrier with the regular structure, and the load is gradually reduced from an axis area to a marginal area of the carrier. Compared with the uniformly loaded three-way catalyst, the provided catalyst can reduce the amount of the coating material by 5-15wt%, and the catalytic activity is equal.

The invention discloses semiconductor processing equipment. The semiconductor processing equipment comprises a chamber body having a reaction cavity inside; a first tray arranged inside the reaction cavity and provided with a sheet groove for bearing a wafer; and an inductance coil which surrounds the periphery of the chamber body and is used for heating the first tray, the first tray consisting of a plurality of sub-trays, and physical gaps existing among the sub-trays. According to the semiconductor processing equipment in the invention, the first tray is separated into the plurality of sub-trays, so that influence of a skin effect on the first tray can be effectively reduced, uniformity of temperature distribution of the first tray is improved, and radial gradients of temperature distribution are lowered, thereby enabling a temperature rise of a substrate located inside the sheet groove to be more uniform, and improving a process effect of semiconductor processing equipment.

The invention discloses a stratum radial resistivity continuous inversion method, which comprises the following steps of 1) constructing a radial gradient stratum model on the basis of a quadratic fractal function according to the characteristics that invading stratum features show that two stable regions exist at two ends and asymptotic change exists between the two ends; 2) based on natural gamma and resistivity logging curves, performing automatic stratification on the stratum by combining wavelet transform multi-stage decomposition and Fourier transform; 3) for each layer, setting RAL1 = Rxo and RAL5 = Rt in combination with five logging curves in the lateral direction of the array, calculating initial values of parameters a and c by utilizing a formula (3), and determining an initialposition ri of an inflection point of a quadratic fractal function curve by calculating the difference of the five resistivity curves, thereby giving an initial value of a parameter b; and 4) throughapproximation iteration of a forward modeling calculation value and a measurement value of the radial gradient stratum model, solving the parameters a, b and c. The method provided by the invention utilizes the gradient stratum model to realize the stratum radial resistivity continuous inversion, and can obtain the resistivity of any position in the radial direction of the stratum.

The invention discloses a picture generation method and device. According to the embodiment of the picture generation method and device, a postage stamp frame picture is generated based on a html structure and a cascading style sheet in a browser rendering web page. For example, through the utilization of a radial gradient schema picture in the cascading style sheet, the initial color value corresponding to the radial gradient schema picture is set into a same color value, and a uniform circular schema picture with same color value is acquired. The attribute parameter corresponding to the uniform circular schema picture is adjusted according to a preset parameter value, and a jagged picture with a postage stamp edge style is generated. According to the embodiment of the picture generation method and device, the generated jagged picture with the postage stamp edge style is a vector diagram generated by the cascading style sheet, the traditional mode that a bitmap file is used as background is replaced, data processing is simple and fast, the system processing resource is saved, the data processing efficiency is improved, and at the same time the occupied size of the picture is comparatively small.

The invention relates to the subtitle render technique in the field of television porgram designing, in particular to a form gradient radial color filling method based on a pixel space mask matrix, which carries out radial color filling on each pixel of the original image within the radius of a mapping in accordance with a certain mapping sequence according to a pixel space mask matrix and a formgradient radial color array, and meanwhile carries out anti-aliasing processing on pixels on the edge of the radius. The radial gradient color processing is carried out according to the vector contour of an object so that the effect of the gradient color is more natural and the visual perception is more strong, thereby facilitating channel program packaging, improving the televiewing quality, promoting the total image of a TV program designing and broadcasting mechanism, meeting the appreciating demands of the public and gaining the higher economic benefits for the TV program designing and broadcasting mechanism.

The invention belongs to the technical field of lithium ion battery negative-electrode materials, and particularly discloses a graphite negative-electrode material with a graphitization degree and hole diameter double-gradient structure. The graphite negative-electrode material is a carbon material with a core/shell structure, the graphitization degree and the hole diameter of the carbon materialare distributed in a radial gradient manner, the graphitization degree from a core to a shell is gradually reduced, and the hole diameter from the core to the shell is gradually reduced. The inventionfurther provides a preparation method of the graphite negative-electrode material with the double-gradient structure of the graphitization degree and the hole diameter. The graphite negative-electrode material serves as a catalyst in porous carbon pore gaps, and subsequent secondary electrical forging treatment is implemented to prepare the negative-electrode material with the double-gradient structure of the graphitization degree and the hole diameter. The material with the gradient structure has the advantages of high reversible capacity and rate performance, long cycle life and the like.

The invention discloses an open-pore structure biomedical zinc material with aperture gradient distribution and a preparation method thereof. The material is pure zinc or zinc alloy, wherein open pores which are mutually communicated in the surface and the inner part of the material, and the inner diameters of the open pores are in gradient distribution along an axial direction or a radial direction; the preparation method comprises the following steps: (1) preparing a pore-forming particulate matter, and dividing into macropore, mesopore and micropore particles according to particle size; (2)filling a graphite crucible with the particles, and arranging according to a needed shape and open-pore distribution manner; (3) putting a weight on the particles, and sintering to obtain a preform;(4) putting pure zinc or zinc alloy to replace the weight, vacuum melting, and enabling melt to flow into a gap; (5) introducing argon, and performing pressurized percolation; (6) removing the preformcomponent in a complex. According to the zinc material, the open pores thereof are of a mutually communicated structure, the porosity, aperture, open-pore shape and product corrosion rate are controllable, and the zinc material with layered gradient distribution and radial gradient distribution of aperture is hardly free of pore obturation and pore forming agent residual phenomena.

The invention relates to a method for preparing polyvinyl alcohol/graphene conductive hybrid fiber based on a wet spinning magnetic field induced migration technology. The method comprises the wet spinning technical processes of synthesis of silane coupling agent-modified nanometer Fe3O4, synthesis of magnetic nanometer migration unit, preparation of the polyvinyl alcohol/graphene conductive hybrid fiber by magnetic field induced migration. The method provided by the invention is simple, easy to operate, and the polyvinyl alcohol/graphene conductive hybrid fiber with low graphene content and high conductivity can be obtained through a method of inducing offset by a magnetic field in shear flow; the obtained polyvinyl alcohol/graphene conductive hybrid fiber overcomes the phenomenon that ahigh-concentration material is crisp, and has high conductivity; an effective method for preparing a high-conductivity hybrid fiber material is provided, wherein the concentration of graphene lamellais in radial gradient distribution, so that the performance of the material shows anisotropic properties, and has wide application in the aspects of sensing, intelligence and braking.

A sputtering target assembly formed by relative positioning of a sputtering target body or bodies and a backing support, such that the backing support is placed within the inside diameter of the sputtering target body. The combination is heated with an induction heater surrounding the target body so that there is achieved a suitable temperature for bonding. Heating is discontinued such that there is a cooling of the bonding material and a bonding relationship established between the sputtering target body (or bodies) and the backing support. Embodiments include adding a conductive layer, as in a conductive fabric wrap, between the induction heater and internal target body(ies) that is/are inductively heated in a manner that enhances axial and radial gradient heating during bonding. The conductive wrap can be used with a low conductivity material as in an LiMO₂ (e.g., Li—CoO₂) target body. A non-adhesive protective wrap can also be placed about the target body such as between the conductive wrap and target body.

The invention dioceses an image dark corner removing method and device for a large visual field camera. Whether a dark corner exists in an image or not is judged according to symmetry of radial gradient distribution of the image; the dark corner is estimated through statistic features of the whole image; and different from a traditional method of estimating the dark corner by selecting a square area with a fixed size, the method is applicable to the images of different resolutions and is applicable to the images with relatively large dark corners, and a possibility of occurring deviation is relatively low. According to the method and the device, parameters are designed according to the to-be-corrected image, the universality is high, the method and the device are applicable to the images with different dark corner effects formed under different illumination and different environments, the application range is relatively wide, and a special camera is not limited. According to the method and the device, model parameters are simplified and solved according to engineering experience, and the calculation quantity is greatly reduced. According to the image dark corner removing method provided by the invention, a chip does not need to be burnt in advance, so the burnout records of the chip can be reduced, and the production cost can be reduced.