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    Movable system for automatically monitoring the correlated wind and temperature field of a bridge
    133.
    发明授权
    Movable system for automatically monitoring the correlated wind and temperature field of a bridge 有权

    公开(公告)号：US11668623B2

    公开(公告)日：2023-06-06

    申请号：US17983412

    申请日：2022-11-09

    Applicant: Southwest Jiaotong University ,  Southwest Petroleum University

    Inventor： Jin Zhu ,  Yongle Li ,  Mengxue Wu ,  Xu Huang

    IPC: G01M5/00 ,  G01W1/02 ,  G01W1/00

    CPC classification number: G01M5/0008 ,  G01M5/0075 ,  G01W1/02 ,  G01W2001/006

    Abstract: A movable system for automatically monitoring the correlated wind and temperature filed of a bridge, including a bridge monitoring subsystem, a cloud server, and a client. The system monitors the meteorological parameters of a bridge surface and a temperature of a bridge structure, performs data analysis and processing on a cloud server, and performs visual data interaction by using a client. A bridge surface-specific meteorological parameter monitoring module is movable, such that the location of the sensor for meteorological data monitoring can be adjusted at any time to monitor an entire bridge deck in a time-sharing manner. A lower cantilever structure has an adjustable height, such that the sensor for meteorological data monitoring can track a height of a boundary layer of the bridge surface. A bridge structure-specific temperature monitoring module adopts distributed patch-type temperature sensors, which can detect the temperature of the bridge structure in all directions.

    Method for batch handover authentication and key agreement oriented to heterogeneous network
    134.
    发明授权
    Method for batch handover authentication and key agreement oriented to heterogeneous network 有权

    公开(公告)号：US11665598B2

    公开(公告)日：2023-05-30

    申请号：US17359664

    申请日：2021-06-28

    Applicant: Southwest Jiaotong University

    Inventor： Wenfang Zhang ,  Xiaomin Wang ,  Dan Chen

    IPC: H04W36/00 ,  H04W12/75 ,  H04L9/40 ,  H04W12/06 ,  H04W84/12

    CPC classification number: H04W36/0027 ,  H04L63/0892 ,  H04W12/06 ,  H04W12/75 ,  H04W36/0038 ,  H04W84/12

    Abstract: A method for batch handover authentication and key agreement oriented to a heterogeneous network generally includes the following steps: A, system establishment and participant registration: users participating in authentication register on the LTE-A network to obtain their respective identity information; B, access authentication: when a large number of users request access to the WLAN, the target network WLAN is discovered by using the ANDSF, and the leader sends a complete group authentication message to the AAA server of the WLAN to request identity authentication; if the authentication succeeds, the AAA server of the WLAN returns an identity authentication response; C, if the authentication fails, the continued execution of the protocol is terminated. The method effectively realizes batch authentication of users during handover from the LTE-A network to the WLAN, and thus has high authentication efficiency, small signaling overheads, and high security.

    Method for surface-modifying titanium alloy
    135.
    发明授权
    Method for surface-modifying titanium alloy 有权

    公开(公告)号：US11535924B1

    公开(公告)日：2022-12-27

    申请号：US17867738

    申请日：2022-07-19

    Applicant: Southwest Jiaotong University

    Inventor： Guodong Cui ,  Dazhi Chen ,  Chengsong Zhang

    IPC: C23C8/64 ,  C23C8/28 ,  C23C8/02

    Abstract: Disclosed is a method for surface-modifying titanium alloy, comprising the following steps: carburizing titanium alloy in solid carburizing agent A and solid carburizing agent B, and then performing gas co-infiltration to realize surface modification treatment of titanium alloy; the solid carburizing agent A includes raw materials of charcoal powder a, barium carbonate, calcium carbonate, barium acetate, urea and cerium carbonate, and the solid carburizing agent B includes raw materials of charcoal powder b, barium carbonate, calcium carbonate and cerium carbonate; and the gases used in the gas co-infiltration are ammonia, air and acetylene.

    METHOD OF RECEIVING A TRANSMITTED SIGNAL OVER A TIME-VARYING CHANNEL AND RECEIVER THEREOF
    136.
    发明申请
    METHOD OF RECEIVING A TRANSMITTED SIGNAL OVER A TIME-VARYING CHANNEL AND RECEIVER THEREOF 有权

    公开(公告)号：US20220368569A1

    公开(公告)日：2022-11-17

    申请号：US17770984

    申请日：2020-10-22

    Applicant: NANYANG TECHNOLOGICAL UNIVERSITY ,  SOUTHWEST JIAOTONG UNIVERSITY

    Inventor： Xiaobei LIU ,  Kushal ANAND ,  Yong Liang GUAN ,  Pingzhi FAN

    IPC: H04L25/02 ,  H04L25/03

    Abstract: There is provided a method of receiving a transmitted signal over a time-varying channel. The method includes: obtaining a received symbol signal in frequency domain based on the transmitted signal; performing a first channel estimation based on the received symbol signal to obtain a plurality of first estimated BEM coefficients; performing a first equalization based on the received symbol signal and the plurality of first estimated BEM coefficients to obtain a plurality of first detected source symbols; and performing one or more rounds of a second channel estimation and a second equalization. Each round includes: performing the second channel estimation based on the received symbol signal and a plurality of detected source symbols to obtain a plurality of second estimated BEM coefficients; performing interference removal based on the received symbol signal, the plurality of detected source symbols and the plurality of second estimated BEM coefficients to obtain an interference reduced symbol signal infrequency domain; and performing the second equalization based on the interference reduced symbol signal and the plurality of second estimated BEM coefficients to obtain a plurality of second detected source symbols. There is also provided a corresponding receiver, and a system for wireless communication over a time-varying channel including the receiver.

    FULL PROBABILITY-BASED SEISMIC RISK ANALYSIS METHOD FOR TUNNEL UNDER FAULT DISLOCATION
    137.
    发明申请
    FULL PROBABILITY-BASED SEISMIC RISK ANALYSIS METHOD FOR TUNNEL UNDER FAULT DISLOCATION 有权

    公开(公告)号：US20220357475A1

    公开(公告)日：2022-11-10

    申请号：US17737037

    申请日：2022-05-05

    Applicant: Southwest Jiaotong University

    Inventor： Ran YUAN ,  Yin CHENG ,  Liping WANG ,  Chaolie NING ,  Xiaohui YU ,  Wenwen LUO ,  Wenqi DU ,  Shuoyu LIU ,  Jun DU

    IPC: G01V1/30 ,  G06F30/23

    Abstract: A full probability-based seismic risk analysis method for a tunnel under fault dislocation comprises: evaluating a magnitude-frequency relationship of a fault; obtaining a probabilistic seismic risk curve of a fault dislocation; calculating a series of bending moments of a tunnel lining under different fault dislocations; obtaining a series of damage index values RM of the tunnel; obtaining a vulnerability model of the tunnel damaged by fault dislocation; calculating a probabilistic risk that the tunnel crossing the fault is damaged due to the dislocation of the active fault; obtaining a probability P that the damage state is equal to or higher than a certain damage state within a specified period; and using the results to guide the assessment of the seismic risk of the tunnel crossing the fault. Modeling and analysis can be performed according to the actual situation of the tunnel crossing the fault with different factors.

    APPARATUS AND METHOD FOR SIMULATING LINE RUNNING STATE OF MAGNETIC LEVITATION (MAGLEV)
    139.
    发明申请
    APPARATUS AND METHOD FOR SIMULATING LINE RUNNING STATE OF MAGNETIC LEVITATION (MAGLEV) 有权

    公开(公告)号：US20220115965A1

    公开(公告)日：2022-04-14

    申请号：US17555895

    申请日：2021-12-20

    Applicant: Southwest Jiaotong University

    Inventor： Jun ZHENG ,  Yanxing CHENG ,  Long KOU ,  Huan HUANG ,  Zhihao KE ,  Zigang DENG

    IPC: H02N15/00 ,  B60L13/06 ,  B61B13/08

    Abstract: This application relates to simulation equipment, and more particularly to an apparatus and method for simulating a line running state of magnetic levitation. The apparatus includes a levitation-guidance mechanism, a moving mechanism and a magnetic guideway fluctuation simulated mechanism. The levitation-guidance mechanism is configured to detect a force on a single Dewar of a maglev train to be simulated. The moving mechanism is configured to move the levitation-guidance mechanism. The magnetic guideway fluctuation simulated mechanism is arranged below the levitation-guidance mechanism, and is configured to apply a variable force to the levitation-guidance mechanism. The variable force is configured to simulate a constantly-variable electromagnetic force applied to the levitation-guidance mechanism by a real track.

    SUPERCONDUCTING BULK COOLING APPARATUS AND COOLING METHOD FOR HIGH-TEMPERATURE SUPERCONDUCTING MAGNETIC LEVITATION VEHICLE
    140.
    发明申请
    SUPERCONDUCTING BULK COOLING APPARATUS AND COOLING METHOD FOR HIGH-TEMPERATURE SUPERCONDUCTING MAGNETIC LEVITATION VEHICLE 有权

    公开(公告)号：US20220093300A1

    公开(公告)日：2022-03-24

    申请号：US17539426

    申请日：2021-12-01

    Applicant: Southwest Jiaotong University

    Inventor： Zigang DENG ,  Shaolei SUN ,  Yanzhi LIU ,  Jun ZHENG

    IPC: H01F6/04 ,  F25D19/00 ,  F16L59/147 ,  H05K7/20

    Abstract: The present invention discloses a superconducting bulk cooling apparatus and cooling method for a high-temperature superconducting magnetic levitation vehicle. The superconducting bulk cooling apparatus for the high-temperature superconducting magnetic levitation vehicle includes a refrigerating machine, a vacuum box and a Dewar tank. A condensing tank is arranged in the vacuum box, and the condensing tank is communicated with the Dewar tank through a nitrogen siphon pipe and a liquid nitrogen return pipe; a heat exchanger connected with the refrigerating machine is arranged in the condensing tank; and a flexible isolation pipe for thermally insulating and isolating the nitrogen siphon pipe and the liquid nitrogen return pipe is connected between the vacuum box and the Dewar tank. The present invention pumps the phase-change nitrogen out of the Dewar tank through a siphoning effect, so that the immersion cooling of high-temperature superconducting bulks is separated from the re-condensation of the nitrogen.

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