公开(公告)号：US20240256745A1

公开(公告)日：2024-08-01

申请号：US18564244

申请日：2021-08-11

Applicant: SOUTH CHINA NORMAL UNIVERSITY ,  SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD.

Inventor： Dong YUAN ,  Wei LIU ,  Alexander Victor HENZEN ,  Jan GROENEWOLD ,  Mohammad Khorsand AHMADI ,  Hans Markus WYSS ,  Jacob Marinus Jan DEN TOONDER ,  Guofu ZHOU

IPC: G06F30/28

CPC classification number: G06F30/28

Abstract: A method and a system for analyzing a transient current of a non-polar liquid, and an apparatus are disclosed. The method includes: measuring a transient current of a to-be-detected device to obtain a transient current reference curve; determining experimental parameters of a first influencing factor in the to-be-detected device according to the transient current reference curve and preset equations, and measuring experimental parameters of a second influencing factor in the device; constructing a transient current reference model according to the experimental parameters of the first and second influencing factors and a preset current model; adjusting parameters of the first and/or second influencing factor in the transient current reference model to obtain a plurality of transient current models; and calculating corresponding transient current change data according to the transient current models to construct and output a plurality of transient current curves.

公开(公告)号：US20240193788A1

公开(公告)日：2024-06-13

申请号：US18496532

申请日：2023-10-27

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Xiaoyu TANG ,  Qunyuan CHEN

IPC: G06T7/162

CPC classification number: G06T7/162 ,  G06T2207/10028 ,  G06T2207/20021 ,  G06T2207/20076 ,  G06T2207/20084 ,  G06T2207/20221 ,  G06T2207/30196 ,  G06T2207/30261

Abstract: Disclosed are a method, device, computer system for detecting pedestrians based on 3D point clouds. The method includes: obtaining the spatial radar point cloud data of area to be detected; dividing the spatial radar point cloud data to obtain a plurality of 3D voxel grid cells according to a preset unit of voxel; encoding the plurality of 3D voxel grid cells and obtaining the voxel encoded data of the plurality of radar point cloud data; obtaining a first feature map and a second feature map based on a predetermined sparse convolutional backbone network and self-attention transformation network; and performing fusing processing for a fused feature map to input into a predetermined pedestrian detection model for pedestrian detection to obtain the pedestrian detection information of the area to be detected. The present disclosure enables more comprehensive pedestrian detection in the area to be detected with improved accuracy.

公开(公告)号：US11740129B2

公开(公告)日：2023-08-29

申请号：US17298615

申请日：2020-03-30

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Xiaoxu Lv ,  Chengxin Zhou ,  Liyun Zhong ,  Qinwen Ning ,  Shengde Liu

IPC: G01J3/45 ,  G02F1/13363 ,  G01J3/02 ,  G01J3/12

CPC classification number: G01J3/45 ,  G01J3/0224 ,  G01J3/0229 ,  G01J3/0237 ,  G01J3/12 ,  G02F1/133638 ,  G01J2003/1291

Abstract: A differential interference imaging system capable of rapidly changing shear direction and amount includes: a light source (101), a filter (102), a polarizer (103), a sample stage (104), an infinite imaging microobjective (105), a tube lens (106), a shear component, an analyzer (113), and an image sensor (114). After the light intensity and a polarization direction is adjusted, the linearly polarized light passes through a transparent sample, to be collected by the infinite imaging microobjective (105) and to implement imaging through the tube lens (106). An imaging beam is divided into two linearly polarized light fields which are perpendicular to each other in the polarization directions and have tiny shear amount, then they are further combined into an interference light filed by the analyzer (103) to form a differential interference image in the image sensor (114). The system may be flexibly assembled, is simple in structure and easy to implement.

公开(公告)号：US20230183524A1

公开(公告)日：2023-06-15

申请号：US17767603

申请日：2020-12-29

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Weishan LI ,  Zhibin JIANG ,  Lidan XING ,  Youhao LIAO ,  Shiyu CHEN ,  Xiying JIAN ,  Jinxia HUANG

IPC: C09D179/02 ,  H01M50/449 ,  H01M50/426 ,  H01M50/417 ,  H01M10/052 ,  H01M4/13

CPC classification number: C09D179/02 ,  H01M50/449 ,  H01M50/426 ,  H01M50/417 ,  H01M10/052 ,  H01M4/13

Abstract: The present disclosure relates to the technical field of batteries, and specifically relates to a polyamine composite material and a preparation method therefor, a slurry, a separator, an electrode sheet, and a lithium-sulfur battery containing the same. The polyamine composite material comprises a carboxylated carbon-based material serving as a substrate and a polyamine serving as an outer surface layer, and the polyamine is uniformly and smoothly coated on the outer side surface and/or the inner pore surface of the carboxylated carbon-based material. The material is rich in amino groups and is uniform and stable, can be used in the lithium-sulfur battery, and can effectively adsorb lithium polysulfide during a long cycle process.

公开(公告)号：US20230098095A1

公开(公告)日：2023-03-30

申请号：US17889703

申请日：2022-08-17

Applicant: South China Normal University

Inventor： Wei GAO ,  Ying HUANG ,  Mengmeng YANG ,  Jingbo LI

IPC: H01L31/109 ,  H01L31/0232 ,  H01L31/0296 ,  H01L31/0304 ,  H01L31/0352 ,  H01L31/0224 ,  H01L31/18

Abstract: The present disclosure provides a photodiode based on a stannous selenide sulfide nanosheet/GaAs heterojunction and a preparation method and use thereof. The photodiode comprises a structure of the stannous selenide sulfide nanosheet/GaAs heterojunction, forming Au electrodes through thermal vapor deposition on the stannous selenide sulfide nanosheet and GaAs, respectively, and conducting an annealing treatment in a protective gas at a temperature in a range of 150-250° C. The heterojunction is formed by transferring the stannous selenide sulfide nanosheet to a GaAs window, and the GaAs window is obtained by depositing a medium layer film on GaAs and etching the medium layer through lithography and an etchant.

公开(公告)号：US11579477B2

公开(公告)日：2023-02-14

申请号：US16491086

申请日：2017-11-15

Applicant: South China Normal University ,  Shenzhen Guohua Optoelectronics Co., Ltd. ,  Academy of Shenzhen Guohua Optoelectronics

Inventor： Guofu Zhou ,  Hao Li ,  Nan Li

IPC: G02F1/1333 ,  G02F1/166 ,  G02B26/02 ,  G02F1/167 ,  C09K19/38 ,  G02F1/1675 ,  C09K19/04

Abstract: An electrically controlled smart window, which includes two transparent plates arranged oppositely, a power supply component and an in-between light-adjusting area. Hereinto the light-adjusting area is divided into a matrix of light-adjusting units by pixel wall(s), and every units are closely arranged in a grid shape. To the power supply component, an electrode is connected with the pixel wall, and another is localized on the center of light-adjusting unit and did with the transparent plate. Both surface-charged liquid crystal polymer particles and conductive packing fluid are filled into the medium between the two transparent plates. According to the present disclosure, cholesteric liquid crystal polymer microparticles with specific reflection band and surface charges are used as basic reflectors, thereby achieving the significant advantages of being easy to manufacture, low cost, and stable performance, without causing interference to electromagnetic signals.

公开(公告)号：US20230043406A1

公开(公告)日：2023-02-09

申请号：US17790445

申请日：2020-11-12

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Han ZHANG ,  Weiwei ZHU ,  Songbin YE ,  Baoxian YU

IPC: A61B5/00

Abstract: A noninvasive method and system for sleep apnea detection is disclosed. The method includes the following steps: acquiring vital sign signals of a sleeping user; performing structured processing on the vital sign signals of the user to remove invalid signals to obtain a set of valid vital sign signals; extracting multi-dimensional morphological features from a sleep respiratory signal and performing feature training on an initial model of a classifier by means of the multi-dimensional morphological features so as to obtain a sleep breathing detection model; and inputting the set of valid vital sign signals into the sleep breathing detection model and performing signal processing to obtain predicted probability of the user suffering from sleep apnea. As a result, data relating to the probability of a user suffering from sleep apnea can be more accurately obtained, thereby facilitating the determination of whether a sleep apnea event occurs during sleep.

公开(公告)号：US11521852B2

公开(公告)日：2022-12-06

申请号：US17254102

申请日：2018-12-19

Applicant: South China Normal University

Inventor： Richard Notzel ,  Peng Wang ,  Stefano Sanguinetti ,  Guofu Zhou

IPC: H01L21/00 ,  H01L21/02

Abstract: Provided are a method for preparing an InGaN-based epitaxial layer on a Si substrate (12), as well as a silicon-based InGaN epitaxial layer prepared by the method. The method may include the steps of: 1) directly growing a first InGaN-based layer (11) on a Si substrate (12); and 2) growing a second InGaN-based layer on the first InGaN-based layer (11).

公开(公告)号：US11498989B2

公开(公告)日：2022-11-15

申请号：US16498727

申请日：2018-12-28

Applicant: South China Normal University ,  Shenzhen Guohua Optoelectronics Co., Ltd. ,  Academy of Shenzhen Guohua Optoelectronics

Inventor： Guofu Zhou ,  Laurens De Haan ,  Zixuan Deng

IPC: C08F220/06 ,  C08F2/44 ,  C08F2/50 ,  C08F220/34 ,  C08F230/02 ,  C09D133/02 ,  C09D133/14 ,  C09D143/02 ,  C09K19/38

Abstract: A water-responsive interpenetrating polymer network, a preparation method and use thereof are provided. The water-responsive interpenetrating polymer network comprises an interpenetrating polymer network formed by a cholesteric liquid crystal polymer and a polyionic liquid; wherein the cholesteric liquid crystal polymer is formed by polymerization of a liquid crystal mixture; and the polyionic liquid contains a hydrophilic group or is a hydrophilic salt. The interpenetrating polymer network is water responsive without needs of activation with an alkaline solution, which simplifies the preparation process, and has stable water responsiveness performance after prolonged and/or repeated exposure to water. The water-responsive interpenetrating polymer network can be used to prepare light reflective coatings and reflective devices, and has higher commercial value.

公开(公告)号：US20220254939A1

公开(公告)日：2022-08-11

申请号：US17629343

申请日：2019-09-11

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Richard NOTZEL

IPC: H01L29/885 ,  H01L29/20 ,  H01L21/02 ,  H01L29/66 ,  H02M7/06

Abstract: An epitaxial wafer, a method of manufacturing the epitaxial wafer, a diode, and a current rectifier are provided. The epitaxial wafer comprises a Si substrate layer; an insulating layer formed on the Si substrate layer; and a nitride semiconductor layer formed on a surface of the insulating layer facing away from the Si substrate layer; wherein the insulating layer has a thickness configured such that under a forward bias voltage, the insulating layer may allow electrons and holes to pass from one side to the other side of the insulating layer via quantum tunneling so as to allow a forward current flow.