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Beihang University patents


Recent patent applications related to Beihang University. Beihang University is listed as an Agent/Assignee. Note: Beihang University may have other listings under different names/spellings. We're not affiliated with Beihang University, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "B" | Beihang University-related inventors


High-density magnetic memory device

A high-density magnetic memory device includes: a heavy metal strip or an antiferromagnet strip with a thickness of 0-20 nm, and a plurality of magnetic tunnel junctions manufactured thereon, wherein each of the magnetic tunnel junctions represents a memory bit, which from bottom to top comprises a first ferromagnetic metal with a thickness of 0-3 nm, an oxide with a thickness of 0-2 nm, a second ferromagnetic metal with a thickness of 0-3 nm, a synthetic antiferromagnetic layer with a thickness of 10-20 nm and a no. X top electrode with a thickness of 10-200 nm, wherein an x value is a serial number of the memory bit; two ends of the heavy metal strip or the antiferromagnet strip are respectively plated with a first bottom electrode and a second bottom electrode. ... Beihang University

A transmissive photonic crystal fiber ring resonator employing single optical beam-splitter

A transmissive photonic crystal fiber ring resonator employing single optical beam-splitter comprises: a first fiber-optic collimator, a second fiber-optic collimator, a first photonic crystal fiber collimator, a second photonic crystal fiber collimator, an optical beam-splitter, and a fixture. The first fiber-optic collimator, the second fiber-optic collimator, the first photonic crystal fiber collimator, the second photonic crystal fiber collimator, and the optical beam-splitter are fixed on the fixture; the fiber pigtails of the first fiber-optic collimator and the second fiber-optic collimator are the input/output ports; the fiber pigtails of the first photonic crystal fiber collimator and the second photonic crystal fiber collimator are connected. ... Beihang University

Ranking convolutional neural network constructing method and image processing method and apparatus thereof

Present invention provides a ranking convolutional neural network constructing method and an image processing method and apparatus thereof. The ranking convolutional neural network includes a ranking layer that is configured to sort an output of a previous layer of the ranking layer, generate an output of the ranking layer according to the sorted output, and output the output of the ranking layer to a next layer of the ranking layer. ... Beihang University

Method for co-segmentating three-dimensional models represented by sparse and low-rank feature

Presently disclosed is a method for co-segmenting three-dimensional models represented by sparse and low-rank feature, comprising: pre-segmenting each three-dimensional model of a three-dimensional model class to obtain three-dimensional model patches for the each three-dimensional model; constructing a histogram for the three-dimensional model patches of the each three-dimensional model to obtain a patch feature vector for the each three-dimensional model; performing a sparse and low-rank representation to the patch feature vector for the each three-dimensional model to obtain a representation coefficient and a representation error of the each three-dimensional model; determining a confident representation coefficient for the each three-dimensional model according to the representation coefficient and the representation error of the each three-dimensional model; and clustering the confident representation coefficient of the each three-dimensional model to co-segment the each three-dimensional model respectively.. . ... Beihang University

Kind of low magnetic sensitivity pm-pcf based on mechanical buffer

The low magnetic sensitivity pm-pcf based on mechanical buffer is obtained by adding buffer structures in the cladding layer of the photonic crystal fiber. In the center of the fiber, the core region contains at least 3 layers of air-holes, enclosed by the cladding layer. ... Beihang University

Out-of-band coupled antenna combined by fine-and-straight antenna and bow-tie antenna

An out-of-band coupled antenna combined by fine-and-straight antenna and bow-tie antenna is provided, including: a dielectric slab (1), an aa radiation element (2) provided on an upper plate (1a) of the dielectric slab (1) by a , a cooper pouring process, a ba radiation element (3), an a feeder line (4) and a b feeder line (5); an ab radiation element (8) provided on a lower plate (1b) of the dielectric slab (1), a bb radiation element (9), a c feeder line feeder (6) and a d feeder line (7); a first sensor (10a) and a second sensor (10b) which are connected on the aa radiation element (2); a third sensor (10c) and a fourth sensor (10d) which are connected on the ab radiation element (8). The antenna is capable of suppressing out-of-band coupling between indication elements to improve the separation degree.. ... Beihang University

Calculation method of line-of-sight direction based on analysis and match of iris contour in human eye image

The invention provides a calculation method of line-of-sight direction based on analysis and match of iris contour in human eye image, including: a data driven method, for stable calculation of 3d line-of-sight direction via inputting human eye image to be matched with synthetic data of virtual eyeball appearance; two novel optimization matching criterions of eyeball appearance, which effectively reduce effects of uncontrollable factors, such as image scaling and noise on results; a joint optimization method, for the case of continuously shooting multiple human eye images, to further improve calculation accuracy. One application of the invention is virtual reality and human computer interaction which is under the principle that shooting eye images of a user and calculating line-of-sight direction of user to enable interaction with intelligent system interface or virtual realistic object. ... Beihang University

Force feedback handle device with a degree-of-freedom and working method thereof

A force feedback handle device with a degree-of-freedom includes: a driving part (1), a link part (2) and a frame part (3); wherein the driving part (1) and the link part (2) are both installed on a top board (9), and a rotation axis of the link part (2) coincides with a rotation axis of the driving part (1); the driving part (1), the link part (2) and the frame part (3) are fixed and connected by bolts. A working method of the force feedback handle device includes four steps. ... Beihang University

Structure self-adaptive 3d model editing method

The invention provides a structure self-adaptive 3d model editing method, which includes: given a 3d model library, clustering 3d models of same category according to structures; learning a design knowledge prior between components of 3d models in same group; learning a structure switching rule between 3d models in different groups; after user edits a 3d model component, determining a final group of the model according to inter-group design knowledge prior, and editing other components of the model according to intra-group design knowledge prior, so that the model as a whole satisfies design knowledge priors of a category of 3d models. Through editing few components by the user, other components of the model can be optimized automatically and the edited 3d model satisfying prior designs of the model library can be obtained. ... Beihang University

Impedance compensation structure for broadband near-field magnetic-field probe and its construction method

An impedance compensation structure for a broadband near-field magnetic-field probe, includes: a signal via; and a plurality of grounding vias provided around the signal via to form a coaxial via array; wherein the grounding via and the signal via have an identical size, all distances of each of the plurality of the grounding vias to the signal via are equal, and the plurality of the grounding vias forms a circle centered at the signal via; wherein each of the plurality of the grounding vias is connected with a magnetic field probe top layer shield plane and a magnetic field probe bottom layer shield plane; each of the plurality of the grounding vias keeps in a conducting state from a direct current to a high frequency, in such a manner that impedance matching of the broadband near-field magnetic-field probe is achieved.. . ... Beihang University

Resonance suppression structure of a wideband near-field magnetic probe and a construction method thereof

The resonance structure is that two rows of ground via holes are placed symmetrically along two sides of the cb-cpw central conductor; each row of the via holes are equally spaced; every via hole connects a top shield plane layer, a first middle layer and a bottom shield plane layer of the magnetic probe; every via hole is placed out of a rectangle gap at the bottom of the magnetic probe; the via holes form a fence. The construction method: 1. ... Beihang University

Line guided three-dimensional model reshaping method

The invention provides a line guided 3d model reshaping method, including: 1. Extracting a contour of an object from an image, and selecting a contour or main skeleton to create a 2d line database; 2. ... Beihang University

Light field illuminating method, device and system

The invention provides a light field illuminating method, device and system. The method includes: determining, based on position and angle of rays emitted from a projector and focal length of a lens, position and angle of projection rays obtained after the emitted rays being transmitted through a lens array; determining, based on position and angle of projection rays and light probe array of sampled scene, brightness value of projection rays; converting, based on brightness transfer function of projector, brightness value of projection rays into pixel value of projection input image, generating projection input image based on pixel value of projected input image; and performing light field illumination on target object with projection input image. ... Beihang University

Intelligent load-sensing electro-hydrostatic acuator

An intelligent load-sensing eha, comprising a variable displacement hydraulic pump, a symmetrical hydraulic cylinder, a feedback module, a pressure-following valve and an execution mechanism. The symmetrical hydraulic cylinder includes a symmetrical plunger, a first cylinder and a second cylinder separated by the plunger. ... Beihang University

04/27/17 / #20170116481

Method for video matting via sparse and low-rank representation

The present invention provides a method for video matting via sparse and low-rank representation, which firstly selects frames which represent video characteristics in input video as keyframes, then trains a dictionary according to known pixels in the keyframes, next obtains a reconstruction coefficient satisfying the restriction of low-rank, sparse and non-negative according to the dictionary, and sets the non-local relationship matrix between each pixel in the input video according to the reconstruction coefficient, meanwhile sets the laplace matrix between multiple frames, obtains a video alpha matte of the input video, according to α values of the known pixels of the input video and α values of sample points in the dictionary, the non-local relationship matrix and the laplace matrix; and finally extracts a foreground object in the input video according to the video alpha matte, therefore improving quality of the extracted foreground object.. . ... Beihang University

04/13/17 / #20170100781

High-speed precision interrupted ultrasonic vibration cutting method

A high-speed precision interrupted ultrasonic vibration cutting method includes steps of: (1) installing an ultrasonic vibration apparatus on a machine tool, and stimulating a cutting tool to generate a transverse vibration, so as to realize varieties of machining processes; (2) realizing an interrupted cutting process by setting cutting parameters and vibration parameters to satisfy an interrupted cutting conditions; and (3) turning on the ultrasonic vibration apparatus and the machine tool, and starting a high-speed precision interrupted ultrasonic vibration cutting process. High-speed precision interrupted ultrasonic vibration cutting is able to be realized through the above steps during machining of difficult-to-machine materials in aviation and aerospace fields. ... Beihang University

02/09/17 / #20170039309

Transient ir-drop waveform measurement system and method for high speed integrated circuit

A transient ir-drop waveform measurement system and method for a high speed integrated circuit are provided. The system includes all-digital elements and is based on a ring oscillator in ghz. ... Beihang University

01/19/17 / #20170018117

Method and system for generating three-dimensional garment model

The present invention provides a method and a system for generating a three-dimensional garment model, where garment component composition information and attribute information corresponding to each garment component are acquired by acquiring and processing rgbd data of a dressed human body, and then a three-dimensional garment component model corresponding to the attribute information of each garment component is selected in a three-dimensional garment component model library, that is, a three-dimensional garment model can be constructed rapidly and automatically only with rgbd data of a dressed human body, and human interactions are not necessary during the process of construction, thus the efficiency of a three-dimensional garment modeling is improved, and it has significant meaning for the development of computer-aided design, three-dimensional garment modeling and virtual garment fitting technology.. . ... Beihang University








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