Abstract: An electrical system of an off-road vehicle includes a throttle control position sensor and a control module. The control module is configured to determine an acceleration of the off-road vehicle. If the throttle control has not been recently pressed for a preset duration such that the engine is likely in an idling state, and if the acceleration of the off-road vehicle is greater than an acceleration threshold, the control module is capable of controlling the off-road vehicle to perform engine braking. Other factors affecting the engine braking control logic can include vehicle speed, gear selection status, four-wheel drive status, engine brake switch status, pitch angle and corresponding durations of each. The method can improve the accuracy of triggering engine braking by adjusting the parameters of throttle control travel and acceleration, thereby enhancing the safety and stability of off-road vehicles particularly when going down a hill.

Abstract: A method for first-arrival picking of seismic data includes: acquiring seismic data; using an automatic first-arrival picking algorithm to perform preliminary picking of first-arrival times of seismic signals in the seismic data, and generating a training set; performing manual correction on the first-arrival times picked by the automatic first-arrival picking algorithm, and generating a validation set; using the training set and the validation set to respectively create noisy labels and clean labels, and generating a meta-learning dataset; designing a corresponding deep neural network model based on characteristics of the meta-learning dataset; performing iterative training on the deep neural network model by using the meta-learning dataset based on an inner and outer double-loop training procedure of meta-learning; and using the trained deep neural network model to perform first-arrival picking on seismic data.

Abstract: This application provides a data compression method and apparatus. The method includes: compressing first data by using N preconfigured data processing modules, where the compression includes at least one processing operation, a combination of functions of the N data processing modules includes the at least one processing operation, the N data processing modules are determined based on the first data, a task scenario, or a capability of a first device, and N is a natural number greater than 0; and sending the compressed first data.

Abstract: In an implementation, a terminal obtain a downlink reference signal to determine downlink channel information. The terminal further obtains an electromagnetic map comprising first multipath information. The terminal then feeds back the first information to a communication apparatus. The first information is associated with a first mode in which the terminal feeds back the downlink channel information to the communication apparatus, and the first mode is determined based on the downlink channel information and the first multipath information.

Abstract: A signal query method applied to a user-generated content (UGC) editor is performed by a terminal. The method includes: displaying an entry control of a signal presentation interface in a UGC editor; displaying the signal presentation interface in response to a trigger operation for the entry control; and, in response to a selection operation for a first signal of the at least one signal, displaying a details presentation interface of the first signal for presenting details information of the first signal. According to the method, the related information of a signal in a UGC virtual environment is clearly presented to a user, thereby reducing difficulty in searching for a signal in the UGC virtual environment, allowing the user to conveniently and quickly find a needed signal, and improving efficiency of creating the UGC virtual environment.

Abstract: A camera optical lens is provided, including, from an object side to an image side in sequence, a first prism, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The camera optical lens satisfies: 3.99?fA/IH?4.80, Rp1/Rp2?0.80, 1.40?(R1+R2)/(R1-R2)?5.80, and 0.16?d5/d7?1.80, fA and IH respectively represent a focal length and an image height of the camera optical lens, Rp1 represents curvature radius of the object side surface of the first prism, Rp2 represents curvature radius of the image side surface of the first prism, R1 represents curvature radius of an object side surface of the first lens, R2 represents curvature radius of an image side surface of the first lens, d5 represents an on-axis thickness of the third lens, and d7 represents an on-axis thickness of the fourth lens.

Abstract: In a method for generating user generated content (UGC) in a game program, a virtual object located in a virtual environment is output for display in an editor interface of a UGC editor. Based on a motion point editing operation performed on a motion path of the virtual object, at least one motion point for the virtual object in the virtual environment is set. The at least one motion point indicates a motion parameter of the virtual object on the motion path of the virtual environment. A motion of the virtual object in the virtual environment is controlled based on the at least one motion point.

Abstract: This application provides an encoding method and an encoding apparatus based on a polar code, to improve compression performance of a source sequence of a limited length. The method includes: obtaining a source bit sequence; encoding the source bit sequence by using a polar code generation matrix that is based on sub-block column transformation, to obtain a first bit sequence, where the polar code generation matrix is determined based on a first polar code generation matrix and a transformation matrix, and the transformation matrix may achieve effect of performing sub-block column transformation on the first polar code generation matrix; and compressing the first bit sequence, to obtain a compressed bit sequence.

Abstract: A camera optical lens includes from an object side to an image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power; and following relational expressions are satisfied: 0.65?f1/f?0.85; ?1.50?(f3?f4)/f2??0.80; 0.20?(R3+R4)/f2?0.80; 2.00?d1/d3?7.00; and ?3.50?f234/(d3+d5+d7)??2.50. The camera optical lens has excellent optical performance and is particularly suitable for a mobile phone camera lens assembly, and a WEB camera lens composed of camera elements such as CCD, CMOS for high pixels.

Abstract: The method includes: obtaining an input information bit sequence; determining a target matrix based on a first polar code generation matrix and a transformation matrix; encoding the input information bit sequence based on an inverse matrix of a first matrix, to obtain a first bit sequence, where the input information bit sequence is a bit sequence corresponding to an information bit, and the first matrix is a submatrix formed by a row, in the target matrix, corresponding to the information bit and a column, in the target matrix, corresponding to the information bit; and encoding the first bit sequence based on a second matrix, to obtain a second bit sequence, where the second matrix is a submatrix formed by the row, in the target matrix, corresponding to the information bit and a column, in the target matrix, corresponding to a frozen bit.

Abstract: A communication method and apparatus are provided. The method includes: obtaining to-be-compressed data, where the to-be-compressed data includes first data; determining at least one first transform base based on a first data type of the first data; determining second data based on the at least one first transform base and the first data; and sending the second data to a first device. According to the method provided in this application, a unified compression framework based on a transform base is proposed for the to-be-compressed data. At least one first transform base can be flexibly determined based on a data type of the first data, so that the first data is compressed based on the at least one first transform base. This ensures compression performance, enhances compression efficiency, and reduces data transmission overheads.

Abstract: A method includes obtaining, by a first communication apparatus, training data used to train a dictionary used for data compression. The method also includes determining a group of to-be-updated subsets in the dictionary based on the training data. The method further includes determining dictionary update information corresponding to the group of to-be-updated subsets. The method additionally includes sending the dictionary update information.

Abstract: The present disclosure discloses a camera optical lens having five lenses. The five lenses from an object-side to an-image side are: a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; which satisfies following conditions: 0.70?f2/f?1.10; 2.00?(R5+R6)/(R5?R6)?10.00; 0.70?R1/f1?1.30; 5.50?R7/R8?14.0. The camera optical lens can achieve good optical performance while meeting the design requirement for large aperture, long focal length and ultra-thin.

Abstract: Provided are a verification code processing method and apparatus, and a device and a storage medium. The method comprises: upon receiving a trigger operation for verification code display, firstly acquiring a verification code image and verification code input prompt information; and then displaying the verification code image and the verification code input prompt information for verification code input. In the embodiments of the present disclosure, since a verification code image comprises one or more verification codes, at least one verification code is divided into a plurality of areas, and at least two areas are different in color, the overall structure of the verification code is destroyed, thereby improving the OCR resistance performance of the verification code, and achieving the purpose of effectively intercepting malicious behavior.

Abstract: Techniques for determining when speech is directed at another individual of a dialog, and storing a representation of such user-directed speech for use as context when processing subsequently-received system-directed speech are described. A system receives audio data and/or video data and determines therefrom that speech in the audio data is user-directed. Based on this, the system determine whether the speech is able to be used to perform an action by the system. If the speech is able to be used to perform an action, the system stores a natural language representation of the speech. Thereafter, when the system receives system-directed speech, the system generates a rewrite of a natural language representation of the system-directed speech based on the previously-received user-directed speech. The system then determines output data responsive to the system-directed speech using the rewritten natural language representation.

Abstract: A data processing method: A first apparatus performs layering processing on first data based on layering information to obtain N layers of data, where N is an integer greater than or equal to 2, and the layering processing includes data grouping and bit layering. The first apparatus separately performs coding and modulation on the N layers of data to obtain N bitstreams. The first apparatus sends the N bitstreams to a second apparatus.

Abstract: This application provides coding/decoding methods and communications apparatuses thereof. In an implementation, a coding method includes: obtaining a first information bit sequence; determining a first frozen bit sequence based on a probability distribution value P1 of the first information bit sequence, determining a check bit sequence based on a second information bit sequence, where the second information bit sequence is the first information bit sequence or a sequence obtained after a pre-transformation operation is performed on the first information bit sequence, obtaining a first bit sequence based on the second information bit sequence, the check bit sequence, and the first frozen bit sequence, where the first bit sequence includes bits in the second information bit sequence.

Abstract: This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: performing layering on first data, to obtain N layers of data, where N is an integer greater than or equal to 2; receiving modulation and coding indication information from a second communication apparatus, where the modulation and coding indication information indicates an MCS corresponding to each layer of data in P layers of data, the P layers of data belong to the N layers of data, and the MCS corresponding to each layer of data in the P layers of data; and separately performing coding and modulation on the P layers of data based on the MCS corresponding to each layer of data in the P layers of data.

Abstract: This application discloses a communication method that comprises obtaining first data, where the length of the first data is A; compressing the first data into second data, where the length of the second data is C; and generating third data based on the second data, where the third data includes the second data and (T?C+p) alignment bits. T is a threshold in the J thresholds that is greater than or equal to C and the closest to C. The J thresholds correspond to A and are greater than 0, with J being a positive integer greater than or equal to 2. p is a quantity of auxiliary check bits and is an integer greater than or equal to 0. The communication method further comprises performing channel encoding on the third data to obtain fourth data and sending the fourth data.