Abstract: Disclosed is a high-precision dynamic real-time 360-degree omnidirectional point cloud acquisition method based on fringe projection. The method comprises: firstly, by means of the fringe projection technology based on a stereoscopic phase unwrapping method, and with the assistance of an adaptive dynamic depth constraint mechanism, acquiring high-precision three-dimensional (3D) data of an object in real time without any additional auxiliary fringe pattern; and then, after a two-dimensional (2D) matching points optimized by the means of corresponding 3D information is rapidly acquired, by means of a two-thread parallel mechanism, carrying out coarse registration based on Simultaneous Localization and Mapping (SLAM) technology and fine registration based on Iterative Closest Point (ICP) technology.

Abstract: An access point (AP) and a station (STA) communicate with each other, with the AP indicating to the STA either or both of a preamble detection (PD) channel and a signaling (SIG) content channel and with the STA being initially monitoring a primary frequency segment of a plurality of frequency segments in an operating bandwidth of the AP. A downlink (DL) or triggered uplink (UL) communication is performed between the AP and the STA during a transmission opportunity (TXOP) such that: (i) during the TXOP, the STA monitors a preamble on the PD channel and decodes a SIG content on the SIG content channel; and (ii) after an end of the TXOP, the STA switches to the primary frequency segment.

Abstract: A method of a polyurethane foam includes the following steps of: (1) simultaneously pumping a mixed solution prepared from hydrogen peroxide, an organic acid, a catalyst and a stabilizer and a vegetable oil into a first microstructured reactor of a micro-channel modular reaction device for reacting to obtain a reaction solution containing epoxidized vegetable oil; (2) simultaneously pumping the reaction solution containing the epoxidized vegetable oil obtained from the step (1) and a compound of formula III into a second microstructured reactor of the micro-channel modular reaction device for reaction to obtain a vegetable oil polyol; and (3) reacting the vegetable oil polyol prepared from the step (2) with a foam stabilizer, a cyclohexylamine, an isocyanate and a foaming agent cyclopentane for foaming so as to prepare a rigid polyurethane foam.

Abstract: A tracking device includes a camera and a processor is disclosed. The camera is configured to capture several first pictures with a first setting group and several second pictures with a second setting group in turn. The processor is coupled to the camera. The processor is configured to select a current time point picture from several first pictures or several second pictures according to a current time point speed of the tracking device of the current time point, and to determine a current pose of the tracking device of the current time point according to the current time point picture.

Abstract: A preparation method of a flexible polyurethane foam includes the following steps of: (1) subjecting an epoxidized vegetable oil, a benzoylformic acid, a basic catalyst, and an inert solvent to a ring-opening reaction in a first microchannel reactor of a microchannel reaction device to obtain a vegetable oil polyol; (2) subjecting the vegetable oil polyol obtained in the step (1), a propylene oxide and an inert solvent to an addition polymerization reaction in a second microchannel reactor of the microchannel reaction device to obtain a vegetable oil polyol for flexible polyurethane foam; and (3) using the vegetable oil polyol for flexible polyurethane foam obtained in the step (2) as the unique polyol, and subjecting the same and an isocyanate polyol to a foaming reaction to obtain the flexible polyurethane foam.

Abstract: This application discloses a sound collecting method, an electronic device, and a system. The system includes a first electronic device, a left-ear TWS earphone, and a right-ear TWS earphone. In the method, microphones of the first electronic device, the left-ear TWS earphone, and the right-ear TWS earphone may form a first microphone array. When the first electronic device detects a user operation of starting video recording, the first microphone array performs sound collecting to obtain a joint microphone array signal. The first electronic device may perform noise reduction processing on the joint microphone array signal. According to the method, in a near field area of the first microphone array, a target sound signal can be enhanced, an ambient noise sound signal can be suppressed, and sound quality in a recorded video can be improved.

Abstract: Disclosed are a data sending method, a data receiving method, a data sending terminal device, a data receiving terminal device, a system, an electronic device and a computer-readable storage medium. The data sending method may include: acquiring probabilistic shaping information and source data to be sent; performing probabilistic shaping on a part of the source data according to the probabilistic shaping information to obtain shaped data and unshaped data; interleaving the shaped data and the unshaped data to obtain first interleaved data in a first order; performing forward error correction coding on the first interleaved data to obtain check information; interleaving the check information to obtain interleaved check information; modulating the interleaved check information, the shaped data and the unshaped data to obtain modulated symbol data; and sending the modulated symbol data.

Abstract: A data sending method and terminal, a data receiving method and terminal, and a system, a device and a readable storage medium. The data sending method may include: acquiring first source data to be sent; performing probabilistic shaping on part of the first source data to obtain first shaped data and first unshaped data; pre-interleaving the first shaped data to obtain first pre-interleaved data, and pre-interleaving the first unshaped data to obtain second pre-interleaved data; performing forward error correction coding on the first pre-interleaved data and the second pre-interleaved data to obtain first check data; post-interleaving the first pre-interleaved data to obtain first post-interleaved data, and post-interleaving the second pre-interleaved data and the first check data to obtain second post-interleaved data; and modulating the first post-interleaved data and the second post-interleaved data to obtain modulated symbol data.

Abstract: The present disclosure discloses an amino acid helical array film and a preparation method thereof. The amino acid helical array film comprises a substrate and an amino acid helical array uniformly deposited on the substrate. Each amino acid helix is obtained by self-assembling an amino acid with a modifying group. The amino acid is selected from one or more of twenty common natural amino acids or adjacent isomers thereof. The modifying group comprises an N-terminal protecting group and a C-terminal protecting group, wherein the N-terminal protecting group is selected from one or more of carbobenzoxy, a lipid group, t-butoxycarbonyl, and 9-fluorenylmethoxycarbonyl, and the C-terminal protecting group is selected from one or more of nitrophenyl ester, a lipoxy group, and an acylamino group.

Abstract: A BLUETOOTH communications system includes a true wireless stereo (TWS) BLUETOOTH headset and a terminal device, where the TWS Bluetooth headset includes a first earbud and a second earbud. The terminal device controls the first earbud to collect a sound signal and the second earbud to play a sound signal. When an audio application on the terminal device is started, the first earbud collects a first sound signal, performs sound effect processing on the first sound signal to obtain a second sound signal, and sends the second sound signal to the second earbud. The terminal device sends accompaniment audio to the second earbud, and the second earbud performs audio mixing processing on the accompaniment audio and the second sound signal for playing.

Abstract: A piezoelectric transducer is provided herein, comprising a three-dimensional structure made of a plurality of peptides, the peptides being self-assembling and the structure being piezoelectric, wherein at least a portion, or each, of said plurality of peptides comprises peptides of 2 to 10 amino acid residues, provided that the plurality of peptides is not consisted of a plurality of Phe-Phe dipeptides. Further described herein are peptides having an amino acid sequence Hyp-Phe-Phe, Boc-Dip-Dip, (L)Trp-(D)Trp or (D)Trp-(L)Trp, as well as three-dimensional structures comprising such peptides.

Abstract: A method includes displaying, by an electronic device, a first interface, where the first interface includes a recording button used to record a first song, obtaining, by the electronic device, accompaniment of the first song and feature information of a cappella of an original singer, starting to record a cappella of the user that is sung by the user, and displaying, by the electronic device, guidance information on a second interface based on the feature information of the a cappella of the original singer, where the guidance information guides one or more of breathing and vibrato during the user's singing.

Abstract: A thermally stable composition having at least one aromatic cyclic di-peptide is provided having a thermal sustainability of up to 680 Kelvin. The thermally stable compositions can be used in high temperature applications.

Abstract: Self-assembled structures formed of a plurality of cyclic peptides which are in association with metal ions is provided. The cyclic peptides are each of from 2 to 6 amino acid residues, and two or more of the amino acid residues are each independently an aromatic amino acid residue. The self-assembled structures exhibit photoluminescence and can be used or incorporated in light emitting systems.

Abstract: A screw disassembly device includes a driving mechanism, an electric screwdriver, and a collecting mechanism. The driving mechanism is coupled to the electric screwdriver to drive the electric screwdriver to move. The electric screwdriver disassembles a screw and includes a head portion. The head portion adsorbs the screw. The collecting mechanism includes a stripping member, a transfer block, and a receiving box. The transfer block is mounted on the driving mechanism. The transfer block defines a transfer chamber. The head portion movably passes through the transfer block and the transfer chamber. The stripping member clamps the screw within the transfer chamber to remove the screw from the head portion. An inner chamber of the receiving box is coupled to the transfer chamber by the transfer tube. The receiving box generates a negative pressure to suck the screw through the transfer tube into the receiving box.

Abstract: A, method, apparatus, system, computer readable medium, and article of manufacture provide the ability to deliver a media content deliverable. Media content is selected. One or more clients that will receive the selected media content are selected. Independently from additional user input, one or more files are automatically and dynamically selected based on the selected media content and one or more selected clients. The selected files are scheduled for delivery to the clients. Delivery of the one or more files to the selected one or more clients is then confirmed.

Abstract: A universal locking device for stabilizing and fixing bones, including: a steel plate including a threaded hole, and a locking screw including a threaded rod and a screw head. The screw head includes a universal groove. The screw head includes a periphery having an external thread. The external thread corresponds to the threaded hole of the steel plate.

Abstract: The present invention relates to semiconductor technology, and provides methods for erasing, reading and programming a flash memory. In the present invention, when an erase operation is performed on the flash memory, for a sector selected for the erase operation, its N-type well is applied with a voltage of 8V˜12V, its bit line is applied with a voltage of 4V˜6V, and its word line is applied with a voltage of ?7V˜?10V. When a read operation is performed on the flash memory, for a sector selected for the read operation, its N-type well is applied with a VCC voltage; for a flash memory cell selected for the read operation, its bit line is applied with the VCC voltage, and its source line is applied with a voltage of 0V. When a program operation is performed on the flash memory, for a flash memory cell selected for the program operation, its bit line is applied with a voltage of VCC?6.5V˜VCC?4.5V, and its bit line is applied with a voltage of VCC+6V˜VCC+9V.

Abstract: The present invention relates to semiconductor technology, and provides methods for erasing, reading and programming a flash memory. In the present invention, when an erase operation is performed on the flash memory, for a sector selected for the erase operation, its N-type well is applied with a voltage of 8V˜12V, its bit line is applied with a voltage of 4V˜6V, and its word line is applied with a voltage of ?7V˜?10V. When a read operation is performed on the flash memory, for a sector selected for the read operation, its N-type well is applied with a VCC voltage; for a flash memory cell selected for the read operation, its bit line is applied with the VCC voltage, and its source line is applied with a voltage of 0V. When a program operation is performed on the flash memory, for a flash memory cell selected for the program operation, its bit line is applied with a voltage of VCC?6.5V˜VCC?4.5V, and its bit line is applied with a voltage of VCC+6V˜VCC+9V.

Abstract: When analyzing video frames captured for monitoring the IV dripping process, dew droplets could exist in the image. We discussed image processing methods to remove the dew droplets from the background, including computing the difference between frames and averaging to get a proper background image. We also discussed various methods to keep the temperature of some areas of the inner surface of the drip chamber to be above the dew points in order to prevent dew droplets' formation or to remove them. In the end we showed how video of the dripping process could be shown on external display(s) for devices enclosing the drip chamber inside.