Abstract: A goods receiving and delivering mechanism includes a receiving and delivering platform, a pushing mechanism and a first cleaning mechanism. The receiving and delivering platform is used for allowing an unmanned aerial vehicle to descend, and the receiving and delivering platform is provided with a connection area for the unmanned aerial vehicle to deliver or receive goods. The pushing mechanism is arranged on the receiving and delivering platform and is used for pushing the unmanned aerial vehicle to move to the connection area. The pushing mechanism is provided with a coverage area capable of covering the receiving and delivering platform through movement and a dead corner area located outside the coverage are.

Abstract: A data stream de-interleaving method is provided. The method includes: obtaining a first interleaved data stream on which forward error correction FEC encoding is performed; obtaining, based on an interleaving granularity of the first interleaved data stream, N sub-data streams corresponding to the first interleaved data stream, where N is an interleaving depth of the first interleaved data stream, and N is a positive integer greater than 1; determining a de-interleaving position based on FEC codeword boundaries of at least two of the N sub-data streams; and obtaining a first de-interleaved data stream based on the de-interleaving position and the first interleaved data stream.

Abstract: A codeword synchronization method includes: entering a synchronization position determining state in response to a start signal; determining a synchronization position in a received data sequence in the synchronization position determining state, where the synchronization position indicates a start position of a codeword in the data sequence; entering a loss-of-lock detection state in response to determining the synchronization position; verifying, in the loss-of-lock detection state, a plurality of codewords selected based on the synchronization position; and re-entering the synchronization position determining state in response to a verification failure.

Abstract: A codeword synchronization method includes determining a candidate in a plurality of bits of a data sequence received by a receive end, and determining a synchronization position based on the candidate bit, where the synchronization position indicates a start position of a codeword in the data sequence.

Abstract: A codeword synchronization method includes: entering a synchronization position determining state in response to a start signal; determining a synchronization position in a received data sequence in the synchronization position determining state, where the synchronization position indicates a start position of a codeword in the data sequence; entering a loss-of-lock detection state in response to determining the synchronization position; verifying, in the loss-of-lock detection state, a plurality of codewords selected based on the synchronization position; and re-entering the synchronization position determining state in response to a verification failure.

Abstract: A method and an apparatus for processing an Ethernet data stream, a computer system, a network system, and a computer-readable storage medium are disclosed. The method is applied to a receiver apparatus including a first forward error correction FEC decoder and a second FEC decoder. The method includes: obtaining transmission information of a first data stream; and if the transmission information meets a trigger condition, adjusting an error correction capability of the receiver apparatus. The data stream can be flexibly and effectively processed by using the method, the apparatus, the computer system, the network system, and the computer-readable storage medium.

Abstract: In a data transmission method, a transmitting end multiplexes a data streams based on a symbol group to obtain b data streams, where a is an integer greater than or equal to 2, b is an integer greater than or equal to 1 and b<a, any one of the b data streams includes a plurality of symbol groups, any symbol group includes a plurality of symbols from different codewords, and any symbol includes a plurality of bits; and the transmitting end transmits the b data streams. The transmitting end performs the multiplexing based on the symbol group including the symbols.

Abstract: A method and an apparatus for transmission of an Ethernet physical layer signal, a device, and a computer-readable storage medium are disclosed. The method includes: obtaining first status information and/or control information, where the first status information indicates that a received first data stream is degraded, and the control information indicates bypass information; and sending the first status information and/or the control information. According to the method, Ethernet physical layer information can be effectively transferred.

Abstract: This application relates to a codeword synchronization method, a chip, a network device, and a system. The codeword synchronization method includes: receiving a first data sequence, where the first data sequence includes a plurality of bits, and a codeword in the first data sequence includes extension information for verifying the codeword; selecting at least one group of bits from the plurality of bits as the extension information to perform verification, and determining a candidate bit in the plurality of bits based on a result of the verification; and determining a synchronization position based on the candidate bit, where the synchronization position indicates a start position of the codeword that is in the first data sequence.

Abstract: An interface includes a first functional part and a second functional part. The first functional part is configured to implement processing dependent on a medium access control (MAC) rate, and the second functional part is configured to implement processing independent of the MAC rate.

Abstract: A data sending method, a device, and a system are provided. A physical medium attachment (PMA) sublayer of an Ethernet device obtains a forward error correction (FEC) encoded data stream, and performs a first data processing on the data stream, to obtain an interleaved data stream, where the first data processing includes performing interleaving in a first interleaving manner, and an interleaving type of the first interleaving manner is symbol interleaving or convolutional interleaving. According to this application, functions of the PMA sublayer can be extended, to meet a requirement for reducing a bit error rate (BER) in a high-rate Ethernet data transmission scenario.

Abstract: An aeroelectromagnetic data inversion method and a system based on an approximate Jacobian matrix are provided. The method includes following steps: dividing an inversion target area into grids, and setting an initial underground space model based on divided grids; constructing an aerial transient electromagnetic three-dimensional inversion target function based on the initial underground space model, and calculating a weighting term of the model based on observation data and the inversion target function; constructing the approximate Jacobian matrix, calculating an iterative equation set based on the approximate Jacobian matrix, and updating the inversion target function based on the iterative equation set to obtain an inversion model; and inputting aerial transient electromagnetic observation data into the inversion model for inversion to obtain inversion results of each induced polarization parameter.

Abstract: In an alignment marker search method, a first module receives a first data stream, where the first data stream is obtained by multiplexing a plurality of second data streams at a reference granularity, any second data stream includes an AM and data from at least one FEC codeword, and the reference granularity is a quantity of bits corresponding to n symbols included in the FEC codeword; obtains a first data segment from a first location in the first data stream at the reference granularity; and performs AM search on the first data segment. The reference granularity is the quantity of bits corresponding to the n symbols. Therefore, when a burst bit error occurs in the first data stream, a quantity of symbols affected by the burst bit error is small.

Abstract: In accordance with an embodiment a method includes: performing convolutional interleaving on symbols comprised in a plurality of first codewords, to obtain an interleaving result, wherein the interleaving result comprises n first bit groups, and the first codeword is encoded with a first forward error correction (FEC) code, and encoding bits corresponding to the n first bit groups with a second FEC code, to obtain n second codewords, wherein a quantity of bits corresponding to the each first bit group is equal to a quantity of bits comprised in information bits of each second codeword.

Abstract: A codeword synchronization method includes determining a candidate in a plurality of bits of a data sequence received by a receive end, and determining a synchronization position based on the candidate bit, where the synchronization position indicates a start position of a codeword in the data sequence.

Abstract: An interface includes a first functional part and a second functional part. The first functional part is configured to implement processing dependent on a medium access control (MAC) rate, and the second functional part is configured to implement processing independent of the MAC rate.

Abstract: The present disclosure relates to the technical field of oilfield chemistry, and discloses a CO2 chemical reaction viscosity-increasing type polymer surfactant for gas channeling control during CO2 flooding in offshore heavy oil reservoirs, a preparation method therefor and use thereof, the CO2 reactive viscosity-increasing polymer surfactant includes structural units represented by formula (1), formula (2) and a formula (3) respectively; R1, R2, R3, R4 and R5 in formula (1) are respectively one or more of H, F, C1-C4 alkyl alcohol, and at least one group is F; R6, R7 and R8 in formula (2) are respectively one or more of H, C1-C4 alkyl; R in formula (3) is one or more of C10-C16 alkyl; the CO2 reactive viscosity-increasing polymer surfactant has a high CO2 gas channeling plugging strength, excellent chemical stability, and desirable heavy oil viscosity reduction performance;

Abstract: Embodiments of this application disclose a data transmission method, an apparatus, a device, a system, and a readable storage medium. The data transmission method includes: A first module obtains first data, where the first data is data that is encoded by using a first FEC code type and on which first processing is performed, and the first processing includes interleaving processing. The first module encodes the first data based on a second FEC code type, to obtain a plurality of second codewords. The first module performs second processing on the plurality of second codewords, to obtain second data. The first module transmits the second data.

Abstract: In a data processing method, a first device obtains at least one service flow, where any service flow in the at least one service flow includes a plurality of code blocks, and the code block includes a data unit and a type, or the code block includes a type, a type indication, and code block content; and the first device maps the plurality of code blocks to at least one PHY link based on a coding scheme of the code blocks, where the at least one PHY link is used to transmit the plurality of code blocks.