Detection method and detection device for trace gas

    公开(公告)号:US12031903B2

    公开(公告)日:2024-07-09

    申请号:US17614763

    申请日:2020-03-30

    Abstract: A detection method and detection system for a trace gas, the detection method comprising: providing a resonant cavity, a gas to be measured being filled inside of a cavity body of the resonant cavity; providing detection light rays having different frequencies, the detection light rays being incident to the inside of the resonant cavity from one end of the resonant cavity in the extending direction and exiting from the other end of the resonant cavity in the extending direction so as to obtain detection light rays carrying information of a trace gas to be measured, and the cavity body of the resonant cavity having a degree of freedom of expansion and retraction in the extending direction so that the longitudinal mode frequency of the resonant cavity matches the frequencies of the incident detection light rays; and according to the detection light rays that have different frequencies and that carry information of said trace gas, acquiring the molecular saturation absorption spectrum of said trace gas, and calculating the concentration of said trace gas. The detection system comprises: a laser generating device, the resonant cavity, a photoelectric detection device, a feedback control device and a scanning control device. At room temperature, detection light rays provided by a conventional laser are used to detect the concentration of a trace gas.

    Regeneration system for carbon-rich amine solutions and method for using the same

    公开(公告)号:US11904270B2

    公开(公告)日:2024-02-20

    申请号:US16260516

    申请日:2019-01-29

    Abstract: The invention relates to a regeneration system for a carbon-rich amine solution produced in carbon dioxide capture from a mixed gas and a method for using the same. This regeneration system is composed of a bipolar membrane electrodialysis apparatus and a carbon dioxide removal apparatus, wherein the bipolar membrane electrodialysis apparatus is composed of a bipolar membrane electrodialysis membrane stack fixed between an anode plate and a cathode plate, the carbon dioxide removal apparatus is composed of one or more hollow fiber membrane contactors, the inlet of the carbon dioxide removal apparatus is fluidly connected with the outlet of the acid chamber of the bipolar membrane electrodialysis apparatus, the outlet of the carbon dioxide removal apparatus is fluidly connected with the acid solution storage tank, and carbon dioxide gas removed by the carbon dioxide removal apparatus is collected in a carbon dioxide storage tank. In the invention, by treating a carbon-rich amine solution having heat stable salts with a combined apparatus of bipolar membrane electrodialysis and carbon dioxide removal, individual operation for conventional heat stripping and organic amine regeneration is avoided, the energy consumption of carbon capture is reduced, the process flow is simplified, and the overall net capture efficiency of carbon dioxide is improved.

    SYSTEM OF SCANNING ELECTRON MICROSCOPE SAMPLE BOX AND METHOD OF OPENING THE SAME

    公开(公告)号:US20240014001A1

    公开(公告)日:2024-01-11

    申请号:US18257213

    申请日:2021-01-29

    CPC classification number: H01J37/20 H01J37/28 H01J2237/204

    Abstract: A system of scanning electron microscope sample box and a method of opening the same are provided, including: a sample chamber (1); an exchange chamber (2) communicated with the sample chamber (1), a sample stage base (3) is disposed in the exchange chamber (2), the sample stage base (3) is subjected to an external force to be translated from the exchange chamber (2) to the sample chamber (1), and an inner wall of the exchange chamber (2) is provided with a pulling arm (4); and a sample box including a box body (5) and a box cover (6) sealing the box body (5), wherein the box body (5) is placed on the sample stage base (3) of the exchange chamber (2), and the box cover (6) is connected to the pulling arm (4), so that the box body (5) is separated from the box cover (6) when the sample stage base (3) is subjected to the external force to translate the box body (5) from the exchange chamber (2) to the sample chamber (1). The method of opening the scanning electron microscope sample box provided by the present disclosure is simple and is easy for implementation, reducing a difficulty and a cost of a process of manufacturing the sample box.

    ENCODING METHOD, DECODING METHOD, AND DEVICE
    109.
    发明公开

    公开(公告)号:US20230388490A1

    公开(公告)日:2023-11-30

    申请号:US18447885

    申请日:2023-08-10

    CPC classification number: H04N19/105 H04N19/159 H04N19/176 H04N19/70

    Abstract: This application discloses an encoding method, a decoding method, and a device. The encoding method includes: determining an index of an intra prediction mode syntax element value set of a current picture block; performing, by using a neural network, probability estimation on input data that represents a feature of the current picture block, to obtain probability distribution of a plurality of candidate intra prediction mode syntax element value sets, where the probability distribution represents respective probability values of the plurality of candidate intra prediction mode syntax element value sets; and performing entropy encoding on a probability value related to the index of the intra prediction mode syntax element value set of the current picture block based on the probability distribution of the plurality of candidate intra prediction mode syntax element value sets, to obtain a bitstream.

    White light emitting material, preparation method thereof, and application thereof

    公开(公告)号:US11581489B2

    公开(公告)日:2023-02-14

    申请号:US16945060

    申请日:2020-07-31

    Abstract: A white light emitting material having a chemical structural formula represented by formula (I), a preparation method thereof and application thereof. The preparation method comprises subjecting tris(4-iodophenyl)amine and 4-methoxyphenylacetylene or tris(4-iodophenyl)amine and methyl 4-ethynylbenzoate to a coupling reaction under protection of a protective gas and catalysis of a Pd/Cu mixed catalyst, to obtain the white light emitting material. A novel temperature-sensitive light emitting material is synthesized through a one-step method. The material is applied to the field of diode luminescence based on the temperature-sensitive characteristic. White light luminescence can be finally realized only by reasonably controlling the temperature and duration time during heating a substrate. Compared with the existing art, the method greatly saves raw material costs and manufacturing process costs, and provides a novel idea and strategy for use of a white organic light emitting diode.

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