公开(公告)号：US11788160B2

公开(公告)日：2023-10-17

申请号：US17049449

申请日：2020-01-21

Applicant: University of Science and Technology Beijing

Inventor： Chao Feng ,  Rong Zhu ,  Guangsheng Wei ,  Baochen Han ,  Kai Dong ,  Xueliang Wang ,  Wenhe Wu ,  Shaoyan Hu ,  Weifeng Li ,  Juanjuan Jiang ,  Jianfeng Dong

IPC: C21C5/32 ,  C21C5/46

CPC classification number: C21C5/32 ,  C21C5/4673

Abstract: The present disclosure provides a converter CO2—O2 mixed injection smelting method and a fire point area temperature dynamic control method. The method realizes online monitoring through an infrared temperature sensor installed inside an oxygen lance, dynamically adjusts the mixing ratio of CO2 and O2 and the height of the oxygen lance position according to the fire point area temperature changes and process requirements in different smelting stages, so that the secondary smelting system interlockingly and dynamically controls the fire point area temperature and the molten pool heating rate.

公开(公告)号：US20230142397A1

公开(公告)日：2023-05-11

申请号：US17897257

申请日：2022-08-29

Applicant: University of Science and Technology Beijing

Inventor： Qing LIU ,  Leilei ZOU ,  Jiangshan ZHANG ,  Huisheng WANG ,  Biao TAO

IPC: B22D11/22 ,  B22D11/00 ,  C21D6/02

CPC classification number: B22D11/225 ,  B22D11/001 ,  C21D6/02

Abstract: A secondary cooling control method for reinforcing surface solidification structure of microalloyed steel continuous casting bloom includes: in situ observing precipitation behavior of secondary phase particles of the microalloyed steel, and determining a concentrated precipitation temperature range; cooling the microalloyed steel at different cooling rates, obtaining a particle size and a volume fraction of the secondary phase particles of the microalloyed steel at different cooling rates; determining an optimal average cooling rate; determining an optimal average cooling rate r; determining an optimal average cooling rate; and determining an optimal average cooling rate range through intersection of the three optimal average cooling rates whereby the continuous casting secondary cooling is optimized. The present invention can enhance the surface solidification structure of continuous casting bloom and reduce surface and subsurface cracks of the microalloyed steel continuous casting bloom.

公开(公告)号：US20230083210A1

公开(公告)日：2023-03-16

申请号：US17730232

申请日：2022-04-27

Applicant: University of Science and Technology Beijing

Inventor： Wei HE ,  Xiaoyang WU ,  Xinyue TANG ,  Qiang FU ,  Yongbin SUN ,  Yao ZOU ,  Xiuyu HE ,  Hui ZHANG ,  Changyin SUN ,  Yaonan WANG

IPC: G05D1/10

Abstract: A flapping-wing aerial robot formation control method includes: determining a trailing vortex generation mechanism, an energy saving principle and a trailing vortex attenuation mechanism of the formation flight of a group of wild geese in accordance with the pattern of the formation flight of the group of wild geese; determining the formation flight of a group of flapping-wing aerial robots and a formation switching solution in accordance with the trailing vortex generation mechanism, energy saving principle and trailing vortex attenuation mechanism of the formation flight of the group of wild geese in conjunction with the flapping characteristic of a flapping-wing aerial robot from the perspective of energy consumption equalization and energy saving; and carrying out formation keeping control and formation reconfiguration control in accordance with the formation flight of the group of flapping-wing aerial robots and the formation switching solution by controlling positions of the group of flapping-wing aerial robots.

公开(公告)号：US20230015174A1

公开(公告)日：2023-01-19

申请号：US17891342

申请日：2022-08-19

Applicant: University of Science and Technology Beijing

Inventor： Xiaolu Pang ,  Tao Guo ,  Kewei Gao

IPC: C23C14/34 ,  C23C14/06 ,  C23C14/00 ,  C30B29/38 ,  C30B25/06 ,  C30B25/18 ,  C01B21/06

Abstract: In a general aspect, a ceramic thin film with nanotwinned regions at a tunable volume fraction is manufactured. In some aspects, a method for manufacturing a ceramic thin film on a surface of a substrate in an evacuated chamber is disclosed. The ceramic thin film includes crystalline grains; and each of the crystalline grains includes one or more nanotwinned regions. The one or more nanotwinned regions have a volume fraction in a range of 30-80% of the ceramic thin film. The ceramic thin film comprises titanium, nitrogen, and boron. A plurality of targets including a plurality of sputtering materials is prepared. A gas atmosphere in the evacuated chamber is formed. Electric power is supplied to the plurality of targets to cause co-sputtering of the plurality of sputtering materials to form the ceramic thin film with the one or more nanotwinned regions.

公开(公告)号：US20220406413A1

公开(公告)日：2022-12-22

申请号：US17844364

申请日：2022-06-20

Applicant: North China University of Technology ,  Yanshan University ,  University of Science and Technology Beijing

Inventor： LIFENG ZHANG ,  WEIJIAN WANG ,  QIANG REN ,  YING REN ,  YAN LUO

IPC: G16C20/10 ,  G16C20/70

Abstract: A method for predicting a yield of calcium in a calcium treatment process based on deep neural network as provided relates to a calcium treatment process of molten steel refining in the field of iron and steel metallurgy, and includes steps of: obtaining production and operation data information of each of charges and thereby constructing a dataset; training and testing a deep neural network based on constructed dataset to establish a prediction model; and based on the prediction model, predicting and calculating current yield of calcium by taking actual production and operation data information of each charge as input. The method can predict the yield of calcium in the calcium treatment process, is favorable for accurately controlling a calcium content of steel, can stably control the calcium treatment process, improve the calcium treatment effect, improve the product quality, and ensure the production stability.

公开(公告)号：US20220362839A1

公开(公告)日：2022-11-17

申请号：US17639901

申请日：2021-11-25

Applicant: University of Science and Technology Beijing

Inventor： Jingyuan LI ,  Shang DAI ,  Chen CAI ,  Mingfan QI ,  Jinbo GU ,  Jianxin XIE

IPC: B22D13/02 ,  B22D13/04 ,  B22D13/10 ,  B22D13/12 ,  B29C39/08 ,  B29C39/22 ,  C03B19/02

Abstract: A screw smelting machine melts raw materials with a different chemical ratio in a mixing funnel in a feeding order to prevent the long-range diffusion of a melt, and controls outflow at a suitable speed. A centrifugal casting machine solidifies the melt with the ingredients gradient varying into a radial ingredient gradient material by a centrifugal casting style. A temperature sensor monitors temperature of an outer surface of a centrifuge cavity of the centrifugal casting machine during centrifugal casting, and transmits the temperature to a control platform. The control platform determines an optimal flow rate of the melt at an end of screw rod according to ingredient gradient of ingredient radial-gradient pipe materials and a thickness of each component gradient material required with preparation, in combination with a real-time data fed back from the temperature sensor, and feeds back to a feeding end.

公开(公告)号：US20220356543A1

公开(公告)日：2022-11-10

申请号：US17740091

申请日：2022-06-30

Applicant: University of Science and Technology Beijing

Inventor： Baijun YAN ,  Zihui DONG ,  Jie ZHANG

IPC: C22B7/04 ,  C22B7/00 ,  C22B34/32 ,  C22B34/22 ,  C22B34/12

Abstract: The present disclosure provides a method for co-extraction of vanadium, titanium and chromium from vanadium slag. The method selectively reduces pyroxene and fayalite wrapped on spinel through low-temperature hydrogen reduction, iron removal by ferric chloride, and low-temperature leaching of the vanadium slag by oxalic acid, thereby destroying a structure of the spinel, dissociating a spinel phase and a silicate phase, and fully exposing the spinel phase. The method also directly leaches the vanadium slag at a low temperature by acidity and strong complexation of the oxalic acid, and destroys the structure of the spinel, such that vanadium, titanium, chromium and oxalate are complexed into a solution to co-extract vanadium, titanium and chromium. The present disclosure extracts vanadium, titanium and chromium from the vanadium slag, with a leaching rate each being greater than 99%.

公开(公告)号：US20220145413A1

公开(公告)日：2022-05-12

申请号：US17478880

申请日：2021-09-18

Applicant: University of Science and Technology Beijing

Inventor： Qing LIU ,  Zicheng XIN ,  Jiangshan ZHANG ,  Junguo ZHANG ,  Chunhui ZHANG

IPC: C21C7/00

Abstract: A method and system for predicting an addition amount of slagging lime during ladle furnace (LF) refining, and an LF refining method are provided. The method includes: S1: calculating an actual sulfur distribution ratio in combination with a Kungliga Tekniska Högskolan (KTH) model and a least square method by using LF refining parameters; S2: calculating, according to a principle of sulfur mass conservation, a mass of final slag by using the LF refining parameters and the actual sulfur distribution ratio obtained in S1; and S3: calculating, according to a principle of material conservation during LF refining, an addition amount of slagging lime during the LF refining by using the LF refining parameters and the mass of the final slag obtained in S2, thereby predicting the addition amount of the required slagging lime.

公开(公告)号：US20220082487A1

公开(公告)日：2022-03-17

申请号：US17531920

申请日：2021-11-22

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： WEIYAO ZHU ,  DEBIN KONG ,  QINGLIN SHU ,  HAIEN YANG ,  KUN HUANG ,  NAN LI ,  JING XIA

IPC: G01N15/08

Abstract: Device and method for measuring two-phase relative permeability curve of unconventional oil reservoir are provided, wherein the device comprises: two-dimensional porous seepage microscopic model; injection components connected to inlet end of the two-dimensional porous seepage microscopic model; confining pressure components arranged outside the two-dimensional porous seepage microscopic model; a camera component arranged on one side of the two-dimensional porous seepage microscopic model; back pressure components connected to outlet end of the two-dimensional porous seepage microscopic model; and outlet pressure measuring and recovery components connected to outlet end of the two-dimensional porous seepage microscopic model. Two-phase relative permeability curve of unconventional oil reservoir can be measured accurately through the device.

公开(公告)号：US20220005967A1

公开(公告)日：2022-01-06

申请号：US17343048

申请日：2021-06-09

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Yinghui SUN ,  Bingxu LIU ,  Rongming WANG

IPC: H01L31/109 ,  H01L31/0336 ,  H01L31/18

Abstract: In the field of photoelectric devices, a visible light detector is provided with high-photoresponse based on a TiO2/MoS2 heterojunction and a preparation method thereof. The detector, based on a back-gated field-effect transistor based on MoS2, includes a MoS2 channel, a TiO2 modification layer, a SiO2 dielectric layer, Au source/drain electrodes and a Si gate electrode, The TiO2 modification layer is modified on the surface of the MoS2 channel. By employing micromechanical exfoliation and site-specific transfer of electrodes, the method is intended to prepare a detector by constructing a back-gated few-layer field-effect transistor based on MoS2, depositing Ti on the channel surface, and natural oxidation.