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.

    Method and system for simultaneous information and energy transfer with a guard interval signal

    公开(公告)号:US10211957B2

    公开(公告)日:2019-02-19

    申请号:US15831072

    申请日:2017-12-04

    Abstract: A simultaneous information and energy transfer method and system with a guard interval signal are provided. The method comprises the steps of generating, by a transmitting terminal, a controllable guard interval signal according to the current energy demand and environment conditions for channel transmission. The system comprises a transmitting terminal configured to generate a controllable guard interval signal. In the system and method, the guard interval time is fully utilized to transfer a guard interval signal with controllable amount of energy, which not only prevents intersymbol interference, but also provides controllable energy signals within the guard interval time at the same time, thus improving the energy transfer performance of the system and reducing the probability that the receiving terminal is unable to operate normally due to energy shortage. The present invention can be widely applied to a variety of simultaneous wireless information and energy transfer systems.

    Travel prediction method and apparatus, device, and storage medium

    公开(公告)号:US11809970B2

    公开(公告)日:2023-11-07

    申请号:US16931757

    申请日:2020-07-17

    CPC classification number: G06N20/00 G01C21/3446

    Abstract: A travel prediction method, apparatus, device, and storage medium. The method includes obtaining search data and travel path data of a user, performing spatial information mining based on the search data obtaining first spatial information and performing spatial information mining based on the travel path data obtaining second spatial information, performing time information mining based on the first spatial information obtaining first time information and performing time information mining based on the second spatial information obtaining second time information, performing information interaction based on the first spatial information, the second spatial information, the first time information, and the second time information obtaining an interaction feature, the interaction feature including a time feature and/or a spatial feature, and predicting a travel probability of the user going to a target location in a target time period based on the interaction feature, where the target time period matches the time feature, and the spatial feature matches the target location.

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