公开(公告)号：US20240006891A1

公开(公告)日：2024-01-04

申请号：US18343169

申请日：2023-06-28

Applicant: Changsha University of Science and Technology

Inventor： Dongqi LIU ,  Xiangjun ZENG ,  Yongpeng SHEN ,  Yong XU ,  Hao YAO ,  Kai DING ,  Wei DENG

IPC: H02J3/38 ,  H02J3/46 ,  G05B13/02 ,  G05B13/04

CPC classification number: H02J3/381 ,  H02J3/466 ,  G05B13/027 ,  G05B13/042 ,  H02J2203/20 ,  H02J2300/20

Abstract: Provided is a two-stage self-organizing optimized aggregation method and system for distributed resources of a virtual power plant. First-stage aggregation oriented to a distribution transformer area is completed by taking a natural physical cluster composed of distributed energy resources in the distribution transformer area as a first stage, performing aggregation by using an edge computing server deployed in the distribution transformer area, constructing a generalized transformer area load model including wind power, photovoltaic power, and a load, aggregating distributed gas turbines and generators of small hydropower stations in the distribution transformer area into a unified virtual synchronous generator model, aggregating distributed energy storage devices in the distribution transformer area into a centralized virtual energy storage model; second-stage aggregation across distribution transformer areas is completed by uploading all parameters of the generalized transformer area load model, the virtual synchronous generator model, and the virtual energy storage model to a cloud end.

公开(公告)号：US20230294189A1

公开(公告)日：2023-09-21

申请号：US17733109

申请日：2022-04-29

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Weidong TANG ,  Yuanqiang LUO ,  Yinghui REN ,  Wei LI ,  Mingjun ZHANG ,  Kun TANG ,  Gang WU ,  Yongle HU ,  Feng SHI ,  Ziyang CHEN ,  Zhuo WEN

IPC: B23H9/02 ,  B23H3/02 ,  B23H3/08

CPC classification number: B23H9/02 ,  B23H3/02 ,  B23H3/08 ,  B23H2300/10

Abstract: This paper describes an invention involving an electrochemical discharge-enabled micro-grinding process for micro-components of silicon-based materials. The specific machining method is described below. A micro-grinding tool and an auxiliary electrode are respectively connected to the negative and positive electrodes of a pulsed DC power supply. When the current flows through the loop, an electrochemical hydrogen evolution reaction (HER) occurs at the micro-grinding tool in the grinding fluid, which generate multiple hydrogen bubbles. The bubbles coalesce into an insulating gas film and separate the micro-grinding tool from the grinding fluid; when the critical voltage is reached, the gas film is broken down and an electrochemical discharge occurs accompanied by discharge spark; under the action of the discharge spark, the surface material of the workpiece in the discharge-affected region is directly ablated to generate a heat-affected layer (HAL), namely, physical modification.

公开(公告)号：US11761922B2

公开(公告)日：2023-09-19

申请号：US16969588

申请日：2019-12-31

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhong Cao ,  Ningtao Zhou ,  Li Zhou ,  Qin Zhu ,  Jinglin He ,  Zhongliang Xiao ,  Yumin He ,  Zemeng Feng ,  Yulong Yin

IPC: G01N27/327 ,  C07K1/107 ,  G01N27/48

CPC classification number: G01N27/3277 ,  C07K1/1077 ,  G01N27/48

Abstract: A method and a sensor for detecting L-arginine are provided. The method includes synthesizing ferrocene-functionalized hexadecapeptide dithiocyclopentane (FC-P16 Peptide), preparing a polypeptide composite membrane-modified electrode (FC-P16 Peptide/AuE), detecting L-Arg and other steps. The results show that the polypeptide composite membrane-modified electrode (FC-P16 Peptide/AuE) exhibits excellent electrochemical response properties to L-Arg. In 10 mmol/L phosphate-buffered saline (PBS, pH=7.4), the DPV response peak current of the polypeptide composite membrane-modified electrode has an excellent linear relationship with the L-Arg concentration of 1.0×10−13 mol/L to 1.0×10−7 mol/L, with a detection limit of 1.0×10−13 mol/L. With prominent reproducibility, repeatability and selectivity, the modified electrode has potential application in life science and nutritional health.

公开(公告)号：US20230002998A1

公开(公告)日：2023-01-05

申请号：US17846847

申请日：2022-06-22

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  RAILWAY NO. 5 BUREAU GROUP FIRST ENGINEERING CO. LTD.

Inventor： ZHONGCHU TIAN ,  YE DAI ,  YU TANG ,  TAO PENG ,  BINYANG DING ,  PEI CONG ,  XUEJUN PENG ,  YUMAN LUO ,  YALI GU ,  CHAOHUA LUO ,  HUI CAO ,  YUNLONG LIU ,  TAO LING

IPC: E02D19/04

Abstract: A method for constructing a steel sheet pile cofferdam is provided, including: step S1, determining a construction area of the steel sheet pile cofferdam; step S2, piling steel casings, and welding guide frame brackets to the steel casings, the guide frame brackets are connected with a guide frame and limiting clamp plates; step S3, piling steel sheet piles by relying on the guide frame; step S4, pouring subsealing concrete at a bottom of the steel sheet pile cofferdam; step S5, arranging purlins and internal supports within the steel sheet pile cofferdam; step S6, perform a secondary subsealing at the bottom of the steel sheet pile cofferdam; step S7, pumping water within the steel sheet pile cofferdam through a pump and pouring to form a bearing platform on the subsealing concrete; step S8, removing the steel sheet pile cofferdam after the bearing platform is formed.

公开(公告)号：US11535988B1

公开(公告)日：2022-12-27

申请号：US17856142

申请日：2022-07-01

Applicant: Changsha University of Science and Technology

Inventor： Yan Han ,  Kai Li ,  Yusheng Xu ,  Fuyou Xu ,  Chunguang Li ,  Peng Hu

IPC: E01D19/14 ,  E01D11/04

Abstract: A water damping device includes a steel frame and a water-blocking cup; the device is immersed in the water and connected under the main bridge girder by wire ropes. One end of the water-blocking cup is provided with a blocking ring and a cover. The water-blocking cup cover is mounted between the cup and the blocking ring and is movably connected to the water-blocking cup. The blocking ring is used to prevent the water-blocking cup cover from opening towards the outside of the cup; an array of water-blocking cups is mounted on the steel frame along the downward direction of the water-blocking cup cover.

公开(公告)号：US11498769B2

公开(公告)日：2022-11-15

申请号：US17761977

申请日：2019-11-19

Applicant: Changsha University of Science and Technology

Inventor： Juan Huang ,  Lairong Yin ,  Tao Ling ,  Le Xiao ,  Jinxing Wang ,  Yuyang Peng ,  Peng Xu ,  Minhui Chen

IPC: B65G41/00 ,  B65G63/00 ,  B66C23/42 ,  B65G63/04

Abstract: The invention employs a folding arm conveyor that rotates horizontally. The folding arm conveyor is mainly composed of an undercarriage mounted on the ground of a stockyard, a tower body mounted on the undercarriage, a balance arm, a conveying arm, a tower top, and other main components, wherein the balance arm, the conveying arm, and the tower top are mounted on the tower body. The conveying arm is provided with two portal frames (I) and (II) and an unloading trolley. The tower body is provided with a gyration apparatus and a hopper. The balance arm is provided with a balance trolley. The folding arm conveyor can rotate horizontally, and the conveying arm can be folded and retraced by controlling the wind rope by the windlass, so that the folding arm conveyor can be prevented from colliding with other devices or buildings during the rotation.

公开(公告)号：US11486101B1

公开(公告)日：2022-11-01

申请号：US17867426

申请日：2022-07-18

Applicant: Changsha University of Science and Technology

Inventor： Hanyun Liu ,  Yan Han ,  Peng Hu ,  Chunsheng Cai ,  Na Mao ,  Ying Luo ,  Lidong Wang ,  Lian Shen ,  Baixiang Chen

IPC: E01D19/00 ,  F16F15/027

Abstract: Disclosed is a control method of an airbag-type intelligent control device for vortex-induced vibration of bridges. The airbag-type intelligent control device for vortex-induced vibration (VIV) of bridges includes a control system, which comprises a monitoring device and a control workstation; the monitoring device is used to detect the wind speed and direction near the bridge and the vibration state of the bridge; the control workstation is connected to the monitoring device. The VIV order of bridges is determined based on the detected wind speed, wind direction, and the vibration state of the bridge. The airbag system is mounted on both sides of the bridge and connected to the control workstation; according to the obtained VIV order, the sectional shape parameters of the airbag system are determined, and the airbag system is regulated to have the appropriate sectional shape.

公开(公告)号：US20220341873A1

公开(公告)日：2022-10-27

申请号：US17413629

申请日：2019-08-16

Applicant: Changsha University of Science and Technology ,  Central South University

Inventor： Bo Liang ,  Zhengchun Liu ,  Jianlong Zheng

IPC: G01N27/49 ,  G01N33/42

Abstract: Disclosed is a design reference value quantification method for a modifier dosage of modified asphalt. A curve of unsaturation degree of the modified asphalt as a function of the modifier dosage is plotted, in which the unsaturation degree of a series of modified asphalts is determined by potentiometric titration; further, an inflection point of the unsaturation degree of the modified asphalt as a function of the modifier dosage in the asphalt is obtained by data fitting and analysis, and a reference value of the dosage of the modifier added in the process design of the modified asphalt is established.

公开(公告)号：US20220065808A1

公开(公告)日：2022-03-03

申请号：US17271164

申请日：2020-08-24

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhong CAO ,  Junyi HE ,  Qin ZHU ,  Chu LIU ,  Saifei FENG ,  Huiying HU ,  Donghong YU

IPC: G01N27/327 ,  G01N27/48 ,  C01B32/174

Abstract: A method for a selective detection of L-tryptophan (L-Trp) using formaldehyde as a medium is disclosed. The method includes preparation of a copper sulfide nanosheets-chitosan/acidified functionalized multi-wall carbon nanotubes (CuS NS-CS/F-MWCNTs) composite material, preparation of a composite film-modified electrode CuS NS-CS/F-MWCNTs/GCE, and a detection of the L-Trp. Since oxidation peaks of L-Trp and L-tyrosine (L-Tyr) overlap and are difficult to separate, the present invention provides a method for a highly selective detection of L-Trp through the Pictet-Spengler reaction of formaldehyde (HCHO) with L-Trp, in which the oxidation peak potential of L-Trp is shifted to 0.82 V and the oxidation peak potential of L-Tyr is 0.63 V, thereby effectively avoiding the interference of L-Tyr. The CuS NS-CS/F-MWCNTs/GCE is applied to detect L-Trp in the formaldehyde medium without any interference from L-Tyr or other amino acids with 50-fold concentrations.

公开(公告)号：US20210334431A1

公开(公告)日：2021-10-28

申请号：US16492949

申请日：2019-04-24

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Lei Wang ,  Lizhao Dai ,  Jianren Zhang ,  Xuhui Zhang ,  Yafei Ma

IPC: G06F30/20 ,  G01N33/38 ,  G01N17/00

Abstract: The present invention provides a method for predicting prestress loss after concrete cracking along strand. Corrosion-induced cracking is modeled by the thick-wall cylinder theory, the expansive pressure is evaluated with the residual tensile stress by cracked concrete and confining stress by un-cracked concrete during concrete cracking process. Considering the effect of strand corrosion, the bond strength of corroded strand is evaluated from the contributions of adhesion stress, confinement stress and expansive pressure. A method for prestress loss in corroded pre-tensioned concrete member is proposed with the strain compatibility and force equilibrium equations, incorporating the coupling effects of concrete cracking and bond degradation. The present invention proposes a method for predicting the prestress loss after concrete cracking along strand, which can incorporate the coupling effects of concrete cracking and bond degradation. It has a great significance to evaluate the prestress loss in existing pre-tensioned concrete beams.