ONLINE SIGNATURE AUTHENTICATION SYSTEM AND METHOD BASED ON SOFT DYNAMIC TIME WARPING

    公开(公告)号:US20230385394A1

    公开(公告)日:2023-11-30

    申请号:US18319571

    申请日:2023-05-18

    CPC classification number: G06F21/32 G06F21/64 G06N3/091

    Abstract: An online signature authentication system and an online signature authentication method based on soft dynamic time warping are provided, the system includes a data acquisition module, a data preprocessing module, a signature sequence feature extraction neural network module and a signature sequence feature testing module; the method includes: acquiring the signature sequence to be tested; preprocessing the signature sequence, acquiring the preprocessed data and extracting the time functions of the signature sequence; constructing the neural network and training the neural network based on the time functions of the signature sequence to obtain the signature sequence feature extraction neural network; and based on the preprocessed data and through the signature sequence feature extraction neural network, judging the authenticity by calculating the dynamic time warping distance between the signature sequence features.

    HYBRID FEEDING DEVICE FOR AUTOMATICALLY ADJUSTING CO-FIRING AMOUNT OF DECAYING GARBAGE

    公开(公告)号:US20230383947A1

    公开(公告)日:2023-11-30

    申请号:US18031867

    申请日:2021-10-11

    Abstract: A hybrid feeding device for automatically adjusting a co-firing amount of decaying garbage. The device comprises a mechanical grate furnace, a hybrid garbage conveying device, a raw garbage feeding device, a decaying garbage feeding device, a hybrid garbage crushing device, and a control center. The raw garbage feeding device, the decaying garbage feeding device, and the hybrid garbage conveying device are all connected to the control center. The decaying garbage feeding device is used for transporting decaying garbage to the raw garbage feeding device. The raw garbage feeding device is positioned between the decaying garbage feeding device and the hybrid garbage conveying device. The hybrid garbage crushing device is used for crushing garbage and inputting the garbage to the mechanical grate furnace. The mechanical grate furnace is internally provided with a plurality of temperature sensors, and the plurality of temperature sensors are connected to the control center.

    BIOCHEMICAL COMPUTER LATCH BASED ON ENZYMATIC REACTIONS

    公开(公告)号:US20230342624A1

    公开(公告)日:2023-10-26

    申请号:US18342747

    申请日:2023-06-28

    CPC classification number: G06N3/123

    Abstract: Disclosed is a biochemical computer latch based on enzymatic reactions. Input, output and storage signals of the latch are concentrations or activities of substances or enzymes. Bistable characteristics of the latch are implemented by a plurality of enzymatic reactions that interact with each other. When the plurality of enzymatic reactions are catalyzed by each other, a positive feedback regulation of enzyme concentration or activity can be achieved, so that the biochemical computer latch can be stabilized in one of a plurality of states and stores information in the state. The latch can change the state thereof by means of a change in the input signal, so as to modify the stored information, and can also read the stored information by means of the output signal. Compared with traditional semiconductor latches, the disclosed can be more conveniently used in biochemical computers without conversion between an electrical signal and a chemical signal.

    REINFORCED RECYCLED LUMP/AGGREGATE CONCRETE PRECAST COLUMN AND CONSTRUCTION METHOD THEREOF

    公开(公告)号:US20230323666A1

    公开(公告)日:2023-10-12

    申请号:US18024503

    申请日:2020-12-31

    Inventor: Bo WU Lang LIN

    CPC classification number: E04C3/34 E04C5/0636 B28B23/02

    Abstract: A reinforced recycled block/aggregate concrete precast column and a construction method are provided. The reinforced recycled block/aggregate concrete precast column includes several first one-bar hoops, vertical reinforcement bars, several second one-bar hoops, a flexible hinge area, and recycled block/aggregate concrete; the first one-bar hoops and second one-bar hoops are each provided with an anchor end; the first one-bar hoops and second one-bar hoops are disposed in the flexible hinge area, and only the second one-bar hoops are disposed outside the flexible hinge area; the outer edge of each first one-bar hoop is flush with the outer surface of the reinforced recycled block/aggregate concrete precast column; and the interior of the reinforced recycled block/aggregate concrete precast column is filled with the recycled block/aggregate concrete, thereby greatly increasing the recycling rate of engineering waste, reducing shedding of a concrete protective layer in the flexible hinge area of the column.

    Low-profile circularly polarized isoflux antenna module

    公开(公告)号:US11742594B2

    公开(公告)日:2023-08-29

    申请号:US17569503

    申请日:2022-01-06

    CPC classification number: H01Q21/24 H01Q9/0421

    Abstract: A low-profile circularly polarized isoflux antenna module is provided, which relates to the field of microelectronic antennas, and provides a solution to solve the contradiction between size and gain in conventional technology. The antenna module includes an antenna array, a substrate, a connection plate, and a feeding plate that are stacked in sequence. The feeding network on the feeding plate is electrically connected to the antenna array through probe passing through the connection plate and the substrate. The antenna array includes two or more concentrically distributed antenna elements, and each antenna element forms mutually independent concentric circularly polarized apertures through feed control. The structure is simple to assemble and easy to process, light in weight, small in size, and low in profile.

    Vertical take-off and landing unmanned aerial vehicle having foldable fixed wing and based on twin-ducted fan power system

    公开(公告)号:US11634222B2

    公开(公告)日:2023-04-25

    申请号:US16613930

    申请日:2017-11-16

    Abstract: A vertical take-off and landing (VTOL) unmanned aerial vehicle having a foldable fixed wing and a twin-ducted fan power system (7) arranged at a tail portion of a fuselage in a transverse and tail propulsion arrangement provides lift for vertical take-off and landing and propulsion for horizontal flight. By means of deflection of a control servo plane arranged at a duct exit, a vectored thrust is provided to enable a fast attitude change. When the aerial vehicle takes off and lands vertically/flies at a low speed, the wing is folded to reduce the frontal area exposure to crosswind. When the aerial vehicle is flying horizontally, the wing is expanded to obtain larger lift. A Coanda effect is created at a trailing edge of the wing by suction of the duct to improve performance.

    DUAL-BAND FILTERING SWITCH BASED ON SINGLE QUAD-MODE DIELECTRIC RESONATOR

    公开(公告)号:US20230117966A1

    公开(公告)日:2023-04-20

    申请号:US17523935

    申请日:2021-11-11

    Abstract: A dual-band filtering switch based on a single quad-mode dielectric resonator (DR) includes: a first printed circuit board (PCB) provided thereon with an input terminal; a second PCB provided thereon with an output terminal; a shielding shell arranged between the first and second PCBs and enclosing a shielding cavity together with the first and second PCBs; and a single quad-mode DR arranged in the shielding cavity. The first and second PCBs each include a feeding layer, a dielectric layer, and a ground layer that are stacked in sequence. The feeding layers of the first and second PCBs each include a microstrip line and a switching circuitry connected to the microstrip line, and the feeding layer is in contact with a surface of the DR to realize a switching function of the filtering switch. The proposed filtering switch feature low loss transmission and high selectivity with dual-band operation, miniaturization with the fewest resonators and friendly-integration, simultaneously.

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