公开(公告)号：US11483704B2

公开(公告)日：2022-10-25

申请号：US17134475

申请日：2020-12-27

Applicant: University of Electronic Science and Technology of China ,  Science & Technology Department of Sichuan Province

Inventor： Jie Tang ,  Liang Chen ,  Hong Wen ,  Xinchen Xu ,  Huanhuan Song ,  Kaiyu Qin

IPC: H04W12/03 ,  H04W12/033 ,  H04W12/122 ,  H04L9/06

Abstract: A method for physical layer secure transmission against an arbitrary number of eavesdropping antennas includes: S1: communication between legitimate transmitter Alice and legitimate receiver Bob is confirmed; S2: Alice randomly generates a key bit bk with MS bits, maps the key bit bk into a key symbol K, and performs an XOR on the key bit bk and to-be-transmitted confidential information b to obtain an encrypted bits bs; S3: Bob transmits a pilot sequence to Alice, and Alice calculates a candidate precoding space W and transmits modulated symbol streams s=(s1, . . , sN) by using precoding W(e); S4: Bob measures received signal strength of each antenna, estimates the corresponding antenna vector e, inversely maps the vector e to obtain key symbols and key bits, and demodulates the received symbol streams in sequence at each activated antenna to obtain demodulated ciphertext bits; S5: Bob performs an XOR on observed key bits and the demodulated ciphertext bits to obtain the confidential information.

公开(公告)号：US11466979B2

公开(公告)日：2022-10-11

申请号：US17151681

申请日：2021-01-19

Applicant: University of Electronic Science and Technology of China

Inventor： Chao Wang ,  Zezhan Zhang ,  Peifeng Yu ,  Yi Niu ,  Ying Duan ,  Xueke Gou ,  Yekui Zhong ,  Anmei Qiu ,  Pei Huang ,  Yuehai Zhang ,  Shan Gao ,  Jing Jiang

IPC: G01B11/16

Abstract: The present invention discloses a method of measuring longitude deformation of blades. The radiation and rotation speed of the blade are collected by an optical probe and a synchronized rotation sensor. The stretch of the blade is able to be determined by the obvious change in the light intensity detected by the optical probe. The precision servo motor keeps driving the optical probe to move upward. The collected radiation is compared with the radiation collected on the previous point. The stretch of the blade is calculated based on position of the blade tip which is determined by the time when the high level radiation from the blade is disappeared. The longitude deformation of the blade is calculated by plugging the stretch into the deformation equation. Mapping the calculated deformation with the number of the blade calculated with rotation speed synchronizing signals to achieve the deformation of all the blades.

公开(公告)号：US20220321078A1

公开(公告)日：2022-10-06

申请号：US17608744

申请日：2019-11-13

Applicant: University of Electronic Science and Technology of China

Inventor： Yao SHUAI ,  Chuangui WU ,  Wenbo LUO

IPC: H03H3/02 ,  H03H9/02 ,  H03H9/17

Abstract: The present invention provides a preparation method of solid reflection-type bulk acoustic resonator, including the following steps: taking a piece of ion-implanted piezoelectric material, growing reflecting layers below the implantation face of the piezoelectric material and/or above the substrate, then taking a substrate, and bonding it to the piezoelectric material; heating the bonded intermediate product gained to strip the film from the piezoelectric material and growing an upper electrode on the stripped side of the piezoelectric material. According to the preparation method of solid reflection-type bulk acoustic resonator disclosed in the present invention, resonators with high strength and good performance can be prepared by using wafer bonding and lay transfer technique for preparing high-quality piezoelectric films and combining the solid reflecting layer structure.

公开(公告)号：US11442295B2

公开(公告)日：2022-09-13

申请号：US16858750

申请日：2020-04-27

Applicant: University of Electronic Science and Technology of China

Inventor： Yaxin Zhang ,  Shixiong Liang ,  Xilin Zhang ,  Ziqiang Yang Yang ,  Zhihong Feng

IPC: G02F1/025 ,  G02F1/00 ,  H01Q13/20 ,  H04B10/90 ,  H03C7/02 ,  H01P3/12 ,  H04B10/50

Abstract: A high-electron mobility transistor (HEMT) array terahertz wave modulator loaded in a waveguide is provided, which belongs to the technical field of electromagnetic functional devices and focuses on fast dynamic functional devices in the terahertz band. The device comprises a waveguide cavity and a modulation chip. The modulation chip comprises a semiconductor material substrate, a heterostructure material epitaxial layer, an artificial microstructure, and a socket circuit. The applied voltage controls the distribution change of the two-dimensional electron gas in the HEMT, which in turn controls the resonance mode conversion in the artificial microstructure, thereby control the transmission of electromagnetic waves in the waveguide. The modulator has a modulation depth of up to 96% and a modulation rate above 2 GHz.

公开(公告)号：US11434147B2

公开(公告)日：2022-09-06

申请号：US16871037

申请日：2020-05-10

Applicant: University of Electronic Science and Technology of China

Inventor： Deen Gu ,  Yatao Li ,  Yadong Jiang

IPC: H01M4/02 ,  C01G31/02 ,  C08L39/06

Abstract: A preparation method of a vanadium oxide powder with high phase-transition latent heat includes steps of taking vanadium pentoxide, oxalic acid and PVP as raw materials, preparing a B-phase VO2 nano-powder modified by the PVP, and then annealing the B-phase VO2 nano-powder modified by the PVP at high temperature in an oxygen atmosphere, and obtaining the vanadium oxide powder with high phase-transition latent heat which includes M-phase VO2 with a mass percentage in a range of 96-99% and V6O13 with a mass percentage in a range of 1-4%, and has the phase-transition latent heat larger than 50 J/g. Compared with the vanadium oxide powder prepared by a traditional method without PVP modification and using a vacuum annealing process, the phase-transition latent heat of the vanadium oxide powder provided by the present invention is increased by at least 60%.

公开(公告)号：US11418795B2

公开(公告)日：2022-08-16

申请号：US17460360

申请日：2021-08-30

Applicant: University of Electronic Science and Technology of China

Inventor： Ce Zhu ,  Han Qin ,  Yonghua Wang ,  Yipeng Liu ,  Kai Liu

IPC: H04N19/147 ,  H04N19/176 ,  H04N19/51 ,  H04N19/149

Abstract: A temporal domain rate distortion optimization based on video content characteristic and QP-λ correction provides the temporal domain rate distortion optimization based on the video content characteristic and the QP-λ correction for a new generation encoder AV1, wherein according to a previous temporal domain dependency relationship under an HEVC-RA coding structure, a feature of the new generation encoder AV1 and a video sequence feature, an aggregation distortion of a current coding unit and an affected future coding unit is estimated and ta propagation factor of the current coding unit in a temporal domain distortion propagation model is calculated by constructing a temporal domain distortion propagation chain, wherein a Lagrange multiplier is adjusted through a more accurate propagation factor to realize a temporal domain dependency rate distortion optimization, and a relationship of QP-λ is re-corrected and an I frame is adjusted to achieve a better coding effect.

公开(公告)号：US11410849B2

公开(公告)日：2022-08-09

申请号：US16618354

申请日：2019-03-22

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Chao Wang ,  Ying Duan ,  Jing Jiang ,  Jun Hu ,  Zezhan Zhang ,  Yang Yang ,  Xueke Gou ,  Congjun Wu

IPC: H01L21/20 ,  G02B27/10 ,  G02B27/30 ,  H01L21/02 ,  H01L21/66 ,  G01J5/00 ,  G02B27/14 ,  H01L21/64

Abstract: The present invention designs a measurement scheme for the longitudinal temperature of the film during nitride epitaxial growth, belongs to the field of semiconductor measurement technology. Epitaxial growth technology is one of the most effective methods for preparing nitride materials. The temperature during the growth process restricts the performance of the device. The non-contact temperature measurement method is generally used to measure the temperature of the graphite disk as the base, which can't obtain the longitudinal temperature. The present invention respectively measures the surface temperature of the epitaxial layer and the temperature of the graphite disk by ultraviolet and infrared radiation temperature measurement technologies, and then uses the finite element simulation method to perform thermal field analysis from the bottom surface of the substrate to the surface of the epitaxial layer, so that the longitudinal temperature is obtained, thereby providing a favorable basis for temperature regulation during nitride growth.

公开(公告)号：US20220242534A1

公开(公告)日：2022-08-04

申请号：US17326348

申请日：2021-05-21

Applicant: University of Electronic Science and Technology of China

Inventor： Bei PENG ,  Dunwen WEI ,  Jialiang ZHONG

IPC: B63G8/00 ,  B63H23/02 ,  B63H1/36

Abstract: A fish-like underwater robot includes a shell, a driving assembly and an integrated tension and swing component. The integrated tension and swing component includes a plurality of tension ropes and tension elements. Every two adjacent tension elements are connected in series through the plurality of tension ropes. The driving assembly and the integrated tension and swing component are disposed inside the shell. The driving assembly is disposed at a head of the shell. The integrated tension and swing component has an end connected to a tail of the shell and an end connected to the driving assembly. When the fish-like underwater robot is used, the driving assembly drives the integrated tension and swing component to swing to generate power for forward movement. A traditional fish-like tail swing structure is replaced with an integrated tension skeleton structure.

公开(公告)号：US11374969B2

公开(公告)日：2022-06-28

申请号：US17298610

申请日：2019-12-27

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Jie Tang ,  Hong Wen ,  Huanhuan Song ,  Feiyi Xie ,  Yi Chen

IPC: H04L9/40 ,  G06N3/04

Abstract: A quantitative method for the security access strategy selection of the edge computing terminals includes the following steps: S1. Quantifying and ranking the security risks according to the terminals and data application requirements under the edge computing system. S1. Quantifying and ranking the security risks according to the terminals and data application requirements under the edge computing system. S2. Calculating the security quantification value of terminal and data application. S3. Giving the weight coefficients for the security risk protection of the security access strategies for the terminal and data in the edge computing side. S4. Give the corresponding value of each security strategy to the corresponding terminal and data security protection. S5. Select the corresponding algorithm according to the data set in S4 to select the security strategies.

公开(公告)号：US20220173791A1

公开(公告)日：2022-06-02

申请号：US17126058

申请日：2020-12-18

Applicant: University of Electronic Science and Technology of China

Inventor： Xuesong TAN ,  Xingyu ZHANG

IPC: H04B7/155 ,  H04L12/861

Abstract: A two-way wireless relay transmission method suitable for multiple relay nodes proposes a transmission solution based on a Decode-and-Forward (DF) technology and Network Coding (Network Coding, NC) technology suitable for a two-way wireless relay network. The method has an advantage of achieving a maximum spectrum efficiency based on the DF technology, and proposes a retransmission-free error control solution to avoid a problem of error spreading brought about by the NC technology to obtain an effective transmission throughput that is superior to existing solutions.