279results about How to "Reduce blocking effect" patented technology

Methods and apparatuses for positioning medical devices onto (or close to) a desired portion of the interior wall of an internal channel, such as for scan imaging, for photodynamic therapy and / or for optical temperature measurement. In one embodiment, a catheter assembly has a distal portion that can be changed from a configuration suitable for traversing the internal channel to another configuration suitable for scan at least a spiral section of the interior wall of an internal channel, such as an artery. In one example, the distal portion spirals into gentle contact with (or close to) a spiral section of the artery wall for Optical Coherence Tomography (OCT) scanning. The spiral radius may be changed through the use of a guidewire, a tendon, a spiral balloon, a tube, or other ways.

A video encoding / decoding apparatus and method for color images include a first motion prediction unit that generates a first prediction residue image of an input image on a basis of a first motion prediction result of the input image. An image information detection unit sets a predetermined color component of an R-G-B image to a reference color component and determines whether the input image is a Y-Cb-Cr image or an R-G-B image and whether a color component is the reference color component. A second motion prediction unit performs motion prediction for the first prediction residue image and generates a second prediction residue image if the input image is the R-G-B image and the color component of the input image is not the reference color component.

The present invention provides a method of adaptively selecting an optimal pixel block within an image frame. The method comprises the activity of selecting an optimal block size for fast and accurate motion estimation. The traditional block is extended into an overlapped region to form an extended pixel block. Statistical region information of the non-overlapped region and the overlapped region of the respective extended pixel block is then measured. The optimal block, either the standard (or smaller size) non-overlapped block or the boundary extended overlapped block, is then selected in response to the measured statistical region information.

The invention discloses a light-emitting diode epitaxial wafer and a manufacture method thereof and belongs to the field of semiconductor technology. The epitaxial wafer comprises a substrate, a low-temperature buffer layer grown on the substrate, a non-doped gallium nitride layer, a type-N gallium nitride layer, a multiple-quantum well layer and a type-P gallium nitride layer. At least one quantum barrier from one side of the type-N gallium nitride layer is grown by AlxGa1-xN; 0<x<0.3. At least one quantum barrier layer from one side of the type-P gallium nitride layer is grown by InzGa1-zN; 0<z<0.15. The type-P gallium nitride layer is directly grown on the multiple-quantum well layer. The quantum barrier layers close to the type-N gallium nitride layer are provided with high potential barrier, the quantum barrier layers close to the type-P gallium nitride layer are provided with low potential barrier, electron overflow is reduced, hole injection efficiency is improved, more electrons and holes are composited in the quantum well layer, and internal quantum efficiency of the light-emitting diode is improved accordingly.

A signal adaptive filtering method for reducing blocking effect and ringing noise, a signal adaptive filter, and a computer readable medium. The signal adaptive filtering method capable of reducing blocking effect and ringing noise of image data when a frame is composed ob blocks of a predetermined size includes the steps of: (a) generating blocking information for reducing the blocking effect and ringing information for reducing the ringing noise, from coefficients of predetermined pixels of the upper and left boundary regions of the data block when a frame obtained by deconstructing a bitstream image data for inverse quantization is an intraframe; and (b) adaptively filtering the image data passed through inverse quantization and inverse discrete cosine transform according to the generated blocking information and ringing information. Therefore, the blocking effect and ringing noise can be eliminated from the image restored from the block-based image, thereby enhancing the image restored from compression.

The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and can solve the problem that an optical sensor cannot perform sensing due tolow light transmittance at the position, corresponding to the optical sensor, in the display panel. In the display panel, a pixel region comprises a first pixel group and a second pixel group which are continuous in the row direction and the column direction and are periodically arranged; each of the first pixel group and the second pixel group comprises at least two sub-pixels which are continuously arranged in the row direction and have different colors; a light-transmitting area comprises third pixel groups which are arranged at intervals in the row direction and the column direction; eachof the third pixel groups comprises at least three sub-pixels which are arranged in the row direction and have different colors; the difference value between the row number of any sub-pixel in the third pixel group and the row number of any sub-pixel in the pixel region, which is located in the same column as the sub-pixel and has the same color as the sub-pixel, is an integral multiple of M, wherein M is the difference value of the row numbers of every two adjacent sub-pixels of the color in the pixel area in the column direction.

The present invention relates to a method of interleaving a support comprising providing a support, applying a curable material to a side of the support, applying an interleaving material to the support so as not to be in contact with the curable material, and winding the support to produce a continuous gap between the side of the support opposite the coated side of the support. The present invention also includes a roll of liquid crystalline material comprising a support having thereon a curable material and an interleaving material, wherein the interleaving material is not in contact with the curable material on the support, and wherein the support is wound to form a roll.

The present invention relates to a method for eliminating a blocking effect in a compressed video signal signal. The method of the invention includes: the encoding step of eliminating a blocking effect by compensating the motion of a signal compressed in block unit to be transmitted; the decoding step of restoring the motion compensated video signal to the original video signal by reducing the prediction residual between the motion compensated video signal and the original video signal and the blocking effect; and the post-filtering step of performing post-filtering in a blocking elimination filter in order to eliminate a blocking effect and ring effect remained in the compensated signal. The equation for obtaining the original pixel is made simple by eliminating the remaining blocking effect and ring effect using a loop / post filter. In addition, normalization parameters can be stored in the look-up table and can be detected according to the difference between pixels adjacent to the original pixel and the size of quantizaiton, whereby the equation for restoring the compressed moving video signal, resulting in excessive smoothing, becomes simpler, and filtering control is made possible by a simple equation, thus making a high speed real time video signal processing possible.

A process and device for coding video images using a non object-based coding standard that extracts at least one video object from an image originating from a sequence of images, by the construction of a segmentation key defining the contours of the object in the image. The video object is coded according to the MPEG 2 standard so as to form an elementary stream (ES). The segmentation key relating to the video object is coded according to the MPEG 2 standard, so as to form an elementary stream. A background image into which the object is to be inserted is coded according to the MPEG 2 standard, so as to form an elementary stream. The elementary streams relating to one or more objects and to the background image are multiplexed so as to provide a program stream (PS) or transport stream (TS) according to the MPEG 2 standard.

An ultra-wide bandwidth multi-channel offset Cassegrain dichroic antenna system serves for bidirectional signal transmission between a ground-based system and at least one satellite. By properly selecting the high and low frequency band, ultra wide bandwidths for both high and low frequency band signals are provided. The band widths are about 15%, even up-to 50%, of the carrier frequency. Especially, the band widths for high frequency band signals are much wider than that for low frequency band signals. The low frequency band can be from 10.7 up-to 12.75 GHz while the high frequency band can be from 17 up-to 30 GHz. Furthermore, in order to achieve ultra-wide bandwidth, a surface of a dichroic sub-dish is divided into a plurality of unit areas. Arrangements of the metal dichroic element of one unit area are slightly different from another unit area f, while the metal elements on same unit area are identical.

The invention relates to a spindle system of electrolysis and magnetic grinding combined machining machine tool, which comprises a power and transmission part, a self-suction type structure part, an electromagnetic loop system part, a high-frequency vibration part and a combined machining tool, wherein a pump-type impeller device of the self-suction type structure part is arranged in a liquid inlet barrel of a spindle to generate systemic action on electrolyte during operation, generate downward liquid discharge force, compensate the on-way pressure loss of the electrolyte and play a role of stirring mixed liquor of magnetic grinding materials and the electrolyte. The combined machining tool comprises an electrolysis electrode and a magnetic grinding magnetic pole, and the electrolyte flows out of a machining area through a gap between the electrolysis electrode and a workpiece. A polished rod vibration system of the high-frequency vibration part provides power through a vibration motor, and realizes the high-frequency Z-direction vibration of the spindle and the combined machining tool, and the amplitude and the vibration frequency of the polished rod vibration system are adjusted by adjusting an amplitude adjusting bolt and the rotation speed of a vibration motor. The invention can realize electrochemical machining, magnetic grinding and electrolysis and magnetic grinding combined machining functions.

The invention relates to a graphite compound modification method, which mainly comprises the graphite oxidative modification technology and the graphite coating modification technology. The graphite oxidative modification technology further comprises the following steps: graphite is smashed and subject to ball milling and oxidation reaction together with concentrated nitric acid in a certain temperature. The graphite coating modification technology further comprises the following steps: a surface finishing solvent containing asphalt is prepared; graphite is coated in the surface finishing solvent; and the graphite and asphalt mixture is subject to heat treatment. The prepared compound modified graphite serves as an active material to further prepare an electrode material for a lithium ion battery. According to the method provided by the invention, the capacity per gram and cycle life of natural graphite are effectively improved and prolonged respectively.

The embodiments of theinvention provide a substrate and a manufacturing method and display panel thereof, and relates to the technical field of display. The substrate, and the manufacturing and display panel thereof allow even spreading of ink drops in the grooves that are defined by pixel defining layer so as to effectively increase product quality and display effects. The substrate includes a substrate and a pixel defining layer which is disposed on the substrate. The pixel defining layer includes a dam body and a plurality of micrometer-protrusions which are disposed on the supper surface and the lateral of the dam body. The protrusions have lyophobic properties.

The invention discloses a SiC ring electrode PIN-type nuclear battery and a manufacturing method thereof, which are mainly used for solving the problem that the conversion efficiency of the SiC PIN-junction battery in the prior art is lower. The SiC ring electrode PIN-type nuclear battery comprises a radioactive isotope source layer (1), a SiO2 passivation layer (3), a SiO2 compact insulation layer (2), a p-type ohmic contact electrode (4), a p-type SiC epitaxial layer (5) with the doping concentration of 1*1019-5*1019cm<-3>, an n-type SiC epitaxial layer (6) with the doping concentration of 1*1015-5*1015cm<-3>, an n-type SiC substrate (7) with the doping concentration of 1*1018-7*1018cm<-3> and an n-type ohmic contact electrode (8). A plurality of ring structures the centers of which arerings and the peripheries of which take the centers as circle centers are adopted in the p-type ohmic contact electrode, the rings are connected through a plurality of rectangular strips, a pluralityof pins are reserved on the peripheries of the rings, and the isotope source layer (1) covers the surface of the p-type ohmic contact electrode (4). The SiC ring electrode PIN-type nuclear battery has the advantage of high energy conversion efficiency and can be used as an MEMS (Micro-electromechanical System) on-chip power supply, a cardiac pacemaker power supply and a mobilephone standby power supply.

The invention discloses a novel self-adaptive weight stereo matching method. The novel self-adaptive weight stereo matching method comprises: obtaining a reference image and a target image; obtaininga representation method for each pixel supporting weight value; improving the traditional self-adaptive algorithm, selecting a gray scale absolute difference in a CIELab color space to replace a grayscale absolute difference in a RGB space; using the similarity measure method of Census nonparametric transformation to use a relationship between a central pixel point and pixels in the neighborhoodto replace a gray value of the central pixel point; and finally performing parallax post-processing of left and right consistency detection, sub-pixel enhancement, and median filtering. The inventioneffectively improves the matching precision, enhances the robustness of the stereo matching, and improves the block effect generated by the traditional algorithm in a low texture region.

The present disclosure relates to a video encoding / decoding method and apparatus that account for low frequency components. The method includes generating a reconstructed block by performing a predictive encoding on a current block and generating encoded image data, and generating encoded low frequency data by encoding a low frequency component of an error block generated through subtraction of the reconstructed block from the current block, thereby improving the compression efficiency while reducing blocking effects due to transform and quantization operations by encoding images accounting for low frequency components.

Low-loss wireless stereo Bluetooth earphones, which relate to a technical field of communication, include: a left Bluetooth earphone and a right Bluetooth earphone; both the left Bluetooth earphone and the right Bluetooth earphone comprise an earphone shell; a master control PCB with a chip, and a speaker unit are mounted inside the earphone shell, a Bluetooth RF transceiver module, a power module and an antenna module are installed on the master control PCB, and the antenna module is connected to the master control PCB through an RF coaxial wire; a speaker is mounted at a front portion of the earphone shell; a hanger is provided at a middle portion of the earphone shell; and an antenna is mounted at a rear portion of the earphone shell; during wearing, the antenna extends backwards and is behind an auricle. During wearing, the antenna extends outwards to the back of the ear, which is not limited by the structure of the ear. A distance between the antennas of the left Bluetooth earphone and the right Bluetooth earphone is decreased, as well as a barrier caused by the head. According to measurement results, the RF path loss is 60 dB, which is improved by about 20 dB, thereby providing stable audio transmission to the Bluetooth earphones.

The invention discloses a 1 / 2 type tandem-blade type transonic speed centrifugal impeller, which comprises an inducer consisting of a front row of blades and a guide wheel consisting of a back row of blades, wherein the front and the back rows of the blades have three-dimensional distorted shapes and are divided, staggered and overlapped with one another. The centrifugal impeller is characterized in that the number ratio of the front row of the blades to the back row of the blades is 1:2. In the centrifugal impeller, the front row of the blades are arranged with low consistency and the back row of the blades are arranged with high consistency so that the effective through-flow area is enlarged and the blockage flow is increased; and the evenness of the flow at the outlet of the impeller is improved so that the wake losses and the shock losses between the impeller and a diffuser are reduced, the efficiency of the whole stage is improved, and the surge margin is enlarged.

The embodiment of the invention discloses a log processing method and device for a database, electronic equipment and a computer readable medium. A specific embodiment of the method comprises the steps of renaming a log file stored in a disk in response to determining that the log file stored in the disk reaches a preset log cutting condition; periodically brushing dirty pages of the renamed log file in a memory into a disk at preset dirty page brushing time; calling the log refreshing command to create a new null log file so as to cut out a renamed log file; and clearing the cache informationof the cut log file in the memory. According to the embodiment, the blocking influence of the log lock on the database read-write request during log cutting can be reduced.

The invention relates to a method for reducing the image block effect, which is characterized in that: fixing the value range of image block DCT; based on the pixel information of nearby blocks and said value range, adjusting the DCT of image block; based on the adjust result, compressing and coding the image block. The invention can relate the DCT error of nearby blocks with its distribution character, to connect the edges of nearby blocks, without hurting the detail of image while reducing the block effect. The invention can distinguish the edge caused by the image pattern edge and the block effect. And it can be compatible compression code technique based on B-DCT technique, to improve the quality of video.

The invention discloses a silicon carbide gridding electrode PIN type nuclear battery and a manufacturing method thereof. By the silicon carbide gridding electrode PIN type nuclear battery and the manufacturing method thereof, the problem of low conversion efficiency during the manufacturing of silicon carbide PIN nucleus batteries in the prior art is solved. The silicon carbide gridding electrode PIN type nuclear battery comprises a radioactive isotope source layer (1), a SiO2 compact insulating layer (2), a SiO2 passivation layer (3), a p type ohmic contact electrode (4), a p type SiC epitaxial layer (5) of which the doping density is between 1*10<19> and 5*10<19>cm<-3>, an n type SiC epitaxial layer (6) of which the doping density is between 1*10<15> and 5*10<15>cm<-3>, an n type SiC substrate (7) of which the doping density is between 1*10<18> and 7*10<18>cm<-3> and an n type ohmic contact electrode (8), wherein the p type ohmic contact electrode (4) consists of a plurality of identical square grids, the square grids are formed by partitioning a plurality of transverse rectangular strips and a plurality of longitudinal rectangular strips, and a plurality of pins are reserved at the periphery of the integral grid electrode; and the radioactive isotope source layer (1) covers the surface of the p type ohmic contact electrode (4). The silicon carbide gridding electrode PIN type nuclear battery is high in energy conversion efficiency, and can be used as micro-electromechanical system (MEMS) on-chip power supplies, cardiac pacemaker power supplies and mobile standby power supplies.

A layer I vanadium-doped PIN-type nuclear battery, including from top to bottom a radioisotope source layer(1), a p-type ohm contact electrode(4), a SiO2 passivation layer(2), a SiO2 compact insulation layer(3), a p-type SiC epitaxial layer(5), an n-type SiC epitaxial layer(6), an n-type SiC substrate(7) and an n-type ohm contact electrode(8). The doping density of the p-type SiC epitaxial layer(5) is 1×1019 to 5×1019 cm3, the doping density of the n-type SiC substrate(7) is 1×1018 to 7×1018 cm3. The n-type SiC epitaxial layer(6) is a low-doped layer I formed by injecting vanadium ions, with the doping density thereof being 1×1013 to 5×1014 cm3. Also provided is a preparation method for a layer I vanadium-doped PIN-type nuclear battery. The present invention solves the problem that the doping density of layer I of the exiting SiC PIN-type nuclear battery is high.

The invention discloses a double-characteristic sea surface floating small-target detection method based on sea clutter suppression, and mainly solve the problem of the low detection probability for a small sea surface target in short observation time in the prior art. The implementation process of the method comprises the following steps: 1, block whitening is performed on a training unit time sequence and a reference unit time sequence of pure clutter data; 2, relative time frequency double-characteristic vectors of training units are extracted; 3, a convex hull is formed by utilizing the extracted characteristic vectors, and a decision region is obtained by utilizing a convex hull learning algorithm; 4, relative time frequency double-characteristic vectors of to-be-detected units are extracted; 5, a detection statistical quantity is calculated according to the convex hull forming the decision region and the relative time frequency double-characteristic vectors of the to-be-detected units; and 6, whether a target exists is judged according to the detection statistical quantity, the target is judged to exist if the detection statistical quantity is greater than zero, otherwise, the target is judged to not exist. Detection for a small floating target under a sea clutter background in short observation time can be performed, and the method can used in identification and tracking for a small sea surface floating and low-speed target.

The invention discloses a video encoding and decoding interframe image predicting method and a video codec. The method comprises the following steps: conducting motion evaluation at a position of the whole pixel of a reference frame, and determining the optimum motion vector of the whole pixel position of the current predicting unit in the current frame; then respectively executing first interpolation filter process, non-whole pixel position motion evaluation and motion compensation to obtain a first prediction error, executing second interpolation filter process, non-whole pixel position motion evaluation and motion compensation to obtain a second prediction error, wherein the reference image of the first interpolation filter process comes from prediction units adjacent to the left and upper side of the current predicting unit in the current frame, and the reference image of the second interpolation filter process comes from the reference frame; selecting to execute interpolation filter process corresponding to prediction errors with minimum rate distortion cost or minimum distortion cost in the first prediction error and the second prediction error; and setting interpolation identification so as to lead the interpolation identification to indicate the execution of the selected interpolation filter process. With the invention, the video coding and decoding efficiency can be improved.

The invention discloses an ultrasonic auxiliary precision forging method and device, and relates to the field of forging. The ultrasonic auxiliary precision forging method and device comprise an upperconcave die, a lower concave die, an upper punch head, a lower punch head, an upper ultrasonic vibration mechanism and a lower ultrasonic vibration mechanism;and an ultrasonic vibration device penetrates through a punch cushion sleeve and a through groove in the middle of a template and is fixedly connected to the punch heads, an variable amplitude rod transmits the amplified ultrasonic vibrationto the punch heads, and the punch heads transmits the vibration to a blank. According to the ultrasonic auxiliary precision forging method and device, the frequency, the amplitude, the vibration modeof the ultrasonic vibration and the shape and the size of the punch heads are changed to suit for precision forging of different products; the method and device have the advantages that the plastic deformation capability of the metal is greatly improved, the metal filling property is improved, the friction force between the blank and the die is reduced, the grain structure is refined, the roughness of the forming surface is reduced, the demolding capability of the forge piece is improved, the applicability is wide, the material utilization rate and the product percent of pass are improved.

The invention discloses a three-dimensional image coding method based on a three-dimensional self-organized mapping. The three-dimensional image coding method comprises the following steps: processing left and right images by a 3D SOM algorithm to obtain an optimal quantified code book; taking the left image as an input vector to carry out quantified coding; obtaining a quantification error by the left image and the quantified code vector; carrying out DCT conversion, quantification and Huffman coding; and reconstructing the right image by the reconstructed left image, a parallax error estimation error and a parallax error vector through a decoding end so as to realize effective coding of the three-dimensional images. According to the three-dimensional image coding method, a distance inequation is quoted to be used as judgment evidence and a frequency sensitive factor is also quoted; the three-dimensional self-organized mapping algorithm is improved so that the distortion measurement calculation complexity is reduced and the code book performance is improved; and the improved three-dimensional self-organized mapping algorithm is applied to three-dimensional image coding so that the coding frequency of the left image is effectively improved and the square effect of the reconstructed right image is reduced.

A method for reducing the block effect in video stream comprises the following steps: receiving a frame in the video stream, wherein the frame comprises a plurality of macroblocks; and each macroblock of the plurality of the microblocks consists of four blocks; judging a block of which the quantization parameter in the frame is larger than the first threshold; according to the pixel difference value of two adjacent pixels positioned on both sides of a block boundary of the blocks, judging whether the block boundary is acute and whether the block boundary is a real image edge of an object in the frame; when the block boundary is acute and is not the real image edge of the object in the frame, according to the pixel difference value of the two adjacent pixel positioned on the both sides of the block boundary, selecting filter strength of deblocking calculation; and carrying out deblocking calculation on the blocks positioned on both sides of the block boundary.

The invention discloses a manufacturing method of a nucleopore filtration film to optimize flow passages in the technology field of liquid filtration. The manufacturing method is that a heavy ion accelerator or a reactor is used to radiate an insulation film and radiation damage is formed inside the insulation material; a solvent type release layer is coated on the insulation film; an alkalifast adhesive film is compounded on the surface of the release layer at low temperature to form a composite film; subsequently, under the optimized etching condition, the composite film is etched on one side under the protection of the adhesive film, thus forming non-biconical micropores; the release layer is stripped off at ordinary temperature; the microporous film is washed in de-ionized water before the composite film is dried. The microporous film made by using the method can have the thickness more than 10 micrometers, the opening rate on the upper surface of the film less than 1 percent and the porosity on the lower surface more than 10 percent. When the microporous film is used for liquid filtration, the flow resistance is small, the flow is large, granules are unlikely to be absorbed and cause dead end filtration. The method provided by the invention is applicable for producing films in batch; the process is well-developed; product quality is controlled easily and the cost is low.