公开(公告)号：US20190138926A1

公开(公告)日：2019-05-09

申请号：US16228804

申请日：2018-12-21

申请人： BEIHANG UNIVERSITY

发明人： Tingting Huang ,  Bo Peng ,  Shunkun Yang ,  Shanggang Wang ,  Yuepu Zhao ,  Zixuan Yu ,  Chenbo Du

IPC分类号： G06N7/00 ,  G06F17/18

摘要： A degradation modeling and lifetime prediction method considering effective shocks includes steps of: first collecting degradation test data, then establishing a performance degradation model, and determining an environment or load changing rate threshold of a product subjected to effective shock based on the test data; estimating parameters in the model, and determining effective shock occurrence times based on the future environmental or load profile, and finally preforming lifetime and reliability prediction. Specific steps are as follows: step 1: collecting degradation test data; step 2: establishing a degradation model; step 3: determining an environment or load changing rate threshold; step 4: estimating the parameters; step 5: predicting the times that effective shocks occur; and step 6: performing reliability prediction. The present invention considers effects of effective shocks caused by sharp environment or load changes on product performance degradation, which makes the prediction method more realistic and improves the prediction accuracy.

公开(公告)号：US10282673B2

公开(公告)日：2019-05-07

申请号：US15788117

申请日：2017-10-19

申请人： Beihang University

发明人： Zhipeng Wang ,  Yanbo Zhu ,  Sikun Wang

IPC分类号： G06N20/00 ,  G06N5/04 ,  G01S19/23

摘要： A correlation processing method based on observation data from the Deidou satellite includes steps of: a) collecting observation data from the BeiDou Navigation Satellite System; b) capturing data samples according to the observation data, and determining a membership degree of each data sample, and the data samples are classified; c) constructing a target classification function, and selecting the data samples to remove the unavailable data samples; and testing stationarity of each time series; d) building an observation model by using data samples having stationarity in step c), and determining correctness of the observation model and optimizing the observation model if the observation model is not correct; and e) searching a correct observation model obtained in step d) for correlation data, and performing correlation analysis of the observation data. The method of the present invention improved the quality of observation data can be effectively improved.

公开(公告)号：US10275922B2

公开(公告)日：2019-04-30

申请号：US15711954

申请日：2017-09-21

申请人： BEIHANG UNIVERSITY

发明人： Junjun Pan ,  Lijuan Chen

IPC分类号： G06T13/40 ,  G06T17/20

摘要： Disclosed relates to a method for skinning technology based on extended PBD and for weight retargeting in character animation. A corresponding tetrahedral mesh is generated for a given triangular mesh; a tensile constraint, a volume constraint, a self-collision constraint and an energy constraint of the extended PBD are initialized for the tetrahedral mesh, and vertex weights of the triangular mesh and the tetrahedral mesh are optimized simultaneously; the deformations of the triangular and the tetrahedral meshes are implemented through LBS technique; deformation results of the LBS are optimized through extended PBD; the joint region of the triangular mesh is smoothed through a Laplacian smoothing; bi-harmonic distance fields of the original mesh and a new mesh are calculated respectively, and two corresponding vertices of the mesh are given and a prediction function is defined; A weight retargeting algorithm is implemented in the present application and has a good practicability.

公开(公告)号：US20190100321A1

公开(公告)日：2019-04-04

申请号：US15871066

申请日：2018-01-15

申请人： Beihang University

发明人： Kangwen SUN ,  Ming ZHU ,  Jiaqi DONG ,  Haoquan LIANG ,  Mou SUN ,  Lifeng SHI

IPC分类号： B64D27/02 ,  H02M3/335

摘要： A power supply and distribution device for solar-powered aircraft includes at least two power supply and distribution sub-systems having same configurations. A disconnection of an electrical connection between a plurality of components of each power supply and distribution sub-system can be controlled through a first switch. An electrical connection between the same components of the power supply and distribution sub-systems can be established by controlling a second switch. The power supply and distribution device for solar-powered aircraft has a centralized-distribution design. Specifically, each power supply and distribution sub-system is designed in a centralized mounting manner and has separated power supply and power distribution functions that can work separately. The power supply and distribution systems are designed in a distributed mounting manner which is suitable for solar aircrafts having characteristics of large wingspan and distributed propulsion system, thereby effectively reducing the concentrated stress.

公开(公告)号：US10234479B2

公开(公告)日：2019-03-19

申请号：US15482734

申请日：2017-04-08

申请人： BEIHANG UNIVERSITY

发明人： Zhaowen Yan ,  Jianwei Wang ,  Wei Zhang ,  Donglin Su

IPC分类号： G01Q60/54

摘要： 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. constructing a simulation model formed by the magnetic probe and a 50Ω microstrip in a CST® microwave studio; 2. simulation setting; 3. placing via holes along two sides of the central conductor; 4. connecting a 50Ω matching load to the second end of the microstrip and defining the first end as microstrip port1; defining the end on which mount a SMA connector as probe port2; simulating S21.

公开(公告)号：US20190080455A1

公开(公告)日：2019-03-14

申请号：US15871878

申请日：2018-01-15

申请人： BEIHANG UNIVERSITY

发明人： XIAOWU CHEN ,  JIA LI ,  YAFEI SONG ,  YIFAN ZHAO ,  QINPING ZHAO

IPC分类号： G06T7/10 ,  G06N3/08

摘要： Embodiments of the present invention provide a method and a device for three-dimensional feature-embedded image object component-level semantic segmentation, the method includes: acquiring three-dimensional feature information of a target two-dimensional image; performing a component-level semantic segmentation on the target two-dimensional image according to the three-dimensional feature information of the target two-dimensional image and two-dimensional feature information of the target two-dimensional image. In the technical solution of the present application, not only the two-dimensional feature information of the image but also the three-dimensional feature information of the image are taken into consideration when performing the component-level semantic segmentation on the image, thereby improving the accuracy of the image component-level semantic segmentation.

公开(公告)号：US20190051339A1

公开(公告)日：2019-02-14

申请号：US16162174

申请日：2018-10-16

申请人： BEIHANG UNIVERSITY

发明人： Weisheng Zhao ,  Zhaohao Wang ,  Erya Deng

IPC分类号： G11C11/16 ,  G11C11/22

摘要： A complementary magnetic memory cell includes: a heavy metal film or an antiferromagnetic film, a first magnetic tunnel junction, a second magnetic tunnel junction, a first electrode, a second electrode, a third electrode, a fourth electrode, and a fifth electrode; wherein the first magnetic tunnel junction and the second magnetic tunnel junction are fabricated above the heavy metal film or the antiferromagnetic film; the first electrode, the second electrode and the third electrode are fabricated under the heavy metal film or the antiferromagnetic film; the fourth electrode is fabricated above the first magnetic tunnel junction, and the fifth electrode is fabricated above the second magnetic tunnel junction; to store one bit of data, the first magnetic tunnel junction and the second magnetic tunnel junction are arranged in a pair of complementary resistance states, wherein one magnetic tunnel junction is set to a high resistance state and the other remains unchanged.

公开(公告)号：US20190044242A1

公开(公告)日：2019-02-07

申请号：US16076305

申请日：2017-06-26

申请人： BEIHANG UNIVERSITY

发明人： Qi Wu ,  Donglin Su

IPC分类号： H01Q13/10 ,  H01Q1/38 ,  H01Q1/52 ,  H01Q9/16

摘要： The present invention discloses a narrow band slot antenna with a coupling suppression. The slot antenna includes a medium plate (1), a copper-clad layer (2), an A-capacitor (3), and a B-capacitor (4). The copper-clad layer (2) has an A-slot (21) and a B-slot (22) thereon, the A-capacitor (3) and the B-capacitor (4) are respectively mounted inside and at two ends of the B-slot (22). The present invention loads the capacitors at a specific position on a finite medium plate to increase the isolation between the antennas, which is beneficial to rectify the slot antenna.

公开(公告)号：US20180277184A1

公开(公告)日：2018-09-27

申请号：US15989190

申请日：2018-05-25

申请人： BEIHANG UNIVERSITY

发明人： Weisheng Zhao ,  Zhaohao Wang ,  Mengxing Wang ,  Wenlong Cai

IPC分类号： G11C11/16 ,  G11C11/15 ,  H01L27/22

CPC分类号： G11C11/161 ,  G11C11/15 ,  G11C11/1675 ,  H01L27/222 ,  H01L27/226

摘要： A magnetic memory includes one or more magnetic tunnel junctions, a heavy metal or anti-ferromagnetic strip film, a first bottom electrode and a second bottom electrode. Every magnetic tunnel junction is located on the strip film and represents a memory cell; the first bottom electrode and the second bottom electrode are respectively connected with two ends of the heavy metal or anti-ferromagnetic strip film; every magnetic tunnel junction includes a first ferromagnetic metal, a first oxide, a second ferromagnetic metal, a first synthetic antiferromagnetic layer and an Xth top electrode from bottom to top in sequence, wherein X is a serial number of the memory cell. A data writing method combines spin orbit torque with spin transfer torque to write data, and respectively applies two currents to the magnetic tunnel junction and the heavy metal or anti-ferromagnetic strip film. Only one current is unable to complete data writing.

公开(公告)号：US20180247126A1

公开(公告)日：2018-08-30

申请号：US15719480

申请日：2017-09-28

申请人： BEIHANG UNIVERSITY

发明人： JIA LI ,  XIAOWU CHEN ,  BIN ZHOU ,  QINPING ZHAO ,  CHANGQUN XIA ,  ANLIN ZHENG ,  YU ZHANG

IPC分类号： G06K9/00 ,  G06K9/46 ,  G06K9/62

CPC分类号： G06K9/00718 ,  G06K9/00744 ,  G06K9/00765 ,  G06K9/4638 ,  G06K9/4642 ,  G06K9/6207 ,  G06K9/6215 ,  G06K9/6259 ,  G06K9/6265 ,  G06K9/6267

摘要： Provided is a method and a system for detecting and segmenting primary video objects with neighborhood reversibility, including: dividing each video frame of a video into super pixel blocks; representing each super pixel block with visual features; constructing and training a deep neural network to predict the initial foreground value for each super pixel block in the spatial domain; constructing a neighborhood reversible matrix and transmitting the initial foreground value, constructing an iterative optimization problem and resolving the final foreground value in the temporal spatial domain; performing pixel level transformation on the final foreground value; optimizing the final foreground value for the pixel using morphological smoothing operations; determining whether the pixel belongs to the primary video objects according to the final foreground value. The present disclosure does not require to set a priori assumption for processing a video, and is especially suitable for big data sets including complicated scenarios.