SEALED CORING DEVICE FOR UNDERGROUND COALBED

    公开(公告)号:US20250012159A1

    公开(公告)日:2025-01-09

    申请号:US18548370

    申请日:2023-05-17

    Abstract: The sealed coring device for an underground coalbed comprises a rib drill pipe assembly, a tail bearing pack, a motor cylinder assembly and a sampling cylinder assembly. The rib drill pipe assembly consists of a rib drill pipe, a tail drill pipe joint and a head drill pipe joint. The tail bearing pack is mounted in the tail drill pipe joint and configured for protecting an internal structure from relatively rotating during drilling of the rib drill pipe, so that the stability of the sampling cylinder is ensured. The motor cylinder assembly is mounted in the rib drill pipe and configured for providing power for action of a center shaft in the sampling cylinder assembly.

    METHOD FOR PROCESSING ANISOTROPIC MAGNETIZED PLASMA MEDIUM AND SYSTEM THEREOF

    公开(公告)号:US20240353458A1

    公开(公告)日:2024-10-24

    申请号:US18501739

    申请日:2023-11-03

    CPC classification number: G01R29/0807 G06F30/23 G06F2111/10

    Abstract: A method for processing anisotropic magnetized plasma medium and a system thereof are provided. The method includes obtaining the Maxwell equation and the polarization current density equation based on the electromagnetic characteristics of anisotropic magnetized plasma; processing the Maxwell equation and the polarization current density equation to obtain the electric field intensity, the magnetic field intensity, and the polarization current density after processed; based on the electric field intensity, the magnetic field intensity, and the polarization current density after processed, numerical iterative equations for electric field intensity, magnetic field intensity, and polarization current density in anisotropic magnetized plasma medium are obtained; a numerical modeling simulation electromagnetic model is used to determine the electromagnetic characteristics of the electromagnetic model. The use of the present disclosure to simulate the propagation of electromagnetic waves in anisotropic magnetized plasma medium has higher numerical calculation accuracy.

    Bidirectional circularly polarized antenna element and bidirectional circularly polarized array antenna

    公开(公告)号:US12068542B2

    公开(公告)日:2024-08-20

    申请号:US17886255

    申请日:2022-08-11

    CPC classification number: H01Q21/24 H01Q9/0492

    Abstract: Bidirectional circularly polarized antenna element and bidirectional circularly polarized array antenna are provided, and comprising a dielectric substrate, a feeder, a radiation patch, a first plane, a second plane, a first coupling assembly and a second coupling assembly which are embedded in the surface of the dielectric substrate. The first plane and the second plane of the antenna element are kept at different heights, and compared with the solution that two planes at the same height can only generate linear polarization radiation in the prior art, the circular polarization radiation can be generated, which solves the problem of linear polarization mismatch. Furthermore, two coupling assemblies are introduced into two sides of the radiation patch to enable the coupling effect with the radiation patch, such that the frequency bandwidth of the circularly polarized antenna can be greatly improved without increasing the size of the antenna.

    TEST SYSTEM AND METHOD FOR MEASURING EFFICIENCY OF UNDERGROUND COAL GASIFICATION

    公开(公告)号:US20240125723A1

    公开(公告)日:2024-04-18

    申请号:US18507254

    申请日:2023-11-13

    CPC classification number: G01N25/32 G01N33/24

    Abstract: The present disclosure provides a test system and a method for measuring efficiency of underground coal gasification, and relates to the technical field of underground coal gasification, comprising a gasification agent supply system, a gasifier, an outlet and recycling system and a monitoring system, wherein the gasification agent is mainly injected into the gasifier and then chemically reacts with the coal by igniting the gasifier at a high temperature to generate gas, while after the gas passes through the outlet and recycling system, the composition and content are measured, and the monitoring system monitors an operating state of the gasifier, injection of the gasification agent and production of gas, temperature change in the gasification channel and ignition temperature and pressure gauge data.

    Dual-mode orbital angular momentum (OAM) base cell array and metasurface preparation method

    公开(公告)号:US11962088B2

    公开(公告)日:2024-04-16

    申请号:US17839876

    申请日:2022-06-14

    CPC classification number: H01Q15/0086 H01Q1/38 H01Q1/50

    Abstract: The present disclosure provides a dual-mode orbital angular momentum (OAM) convergence base cell array and metasurface preparation method. The base cell array includes 2n(2n−1) anisotropic cell structures and 2n isotropic cell structures. Each of the anisotropic cell structures includes a bottom ground layer, a dielectric substrate layer and a top pattern layer which are disposed in sequence from bottom to top, where each top pattern layer has an axisymmetric H-shaped structure. Each of the isotropic cell structures includes a bottom ground layer, a dielectric substrate layer and a top pattern layer which are disposed in sequence from bottom to top, where each top pattern layer has a square structure.

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