Abstract: Embodiments of the present disclosure provide a method for calibrating a sound velocity applied to a multi-layer variable thickness structure, comprising: constructing a planar multi-layer medium stacked structure and determining a sound velocity of each layer of medium material in the planar multi-layer medium stacked structure; establishing a curved multi-layer medium stacked structure, the curved multi-layer medium stacked structure being arranged with a plurality of discrete elements; at the same time, establishing a fluctuation equation for determining a sound pressure value of each of the plurality of discrete elements; establishing a loss function between the sound pressure value of each discrete element calculated by the fluctuation equation and a measured sound pressure value of each discrete element; performing a gradient descent calculation on the sound pressure value of each discrete element based on the loss function, iteratively updating to obtain a sound velocity value being used as a weighting

Abstract: The panoramic surround view system in the vehicle can control the projection device of the vehicle to project the preset pattern on the ground around the vehicle, acquire the plurality of target photographs including the preset pattern, and generate the target calibrating data of the surround view cameras according to the plurality of target photographs, so that the surround view cameras of the panoramic surround view system can be calibrated by using the target calibrating data to obtain the panoramic surround view image. Therefore, when the user needs to re-calibrate the calibrating data of the image splicing of the panoramic surround view system of the vehicle, the calibrating process can be completed by only by using the projection device of the vehicle, without using a special calibrating site and equipment, thus simplifying the calibrating operation steps and saving time.

Abstract: Compositions and methods for the treatment of a human subject in need of treatment for a neutrophil-related condition, in particular who has had a stroke or myocardial ischemia reperfusion injury, by administering to the subject a pharmaceutical composition including a compound of Formula 1, wherein the substituents are as described herein, and in particular wherein the compound is 4,4-dimethyl-1-(3-nitrophenyl)-2-(1H-1,2,4-triazol-1-yl)-1-penten-3-one.

Abstract: Provided are an automatic parking control method and apparatus, relating to the industrial field of vehicles. The method comprises: when a speed of a vehicle is in a preset speed range and a time that the speed of the vehicle is in the preset speed range is greater than or equal to a preset time, collecting image data and radar data around the vehicle; inputting the image data and the radar data into a preset convolutional neural network model, and outputting at least one parking slot information; selecting target parking slot information according to a received parking-in selection operation; and according to the target parking slot information, generating a vehicle parking-in track for the vehicle to automatically park according to the vehicle parking-in track.

Abstract: A reversing control method and system and a vehicle, which relate to the technical field of vehicles. In the method, after receiving a reversing instruction for a vehicle, a first reversing trajectory of the vehicle can be acquired; the vehicle can be controlled to reverse according to the first reversing trajectory, such that a driver does not need to control the vehicle, thus avoiding tedious operation by the driver; during a reversing process the first reversing trajectory can be adjusted according to first environmental obstacle information of the vehicle, to acquire a second reversing trajectory; and the vehicle is then controlled to reverse according to the second reversing trajectory. Thus, the danger caused by environmental obstacles during a reversing process may be avoided, and potential safety hazards in process of reversing a vehicle are eliminated.

Abstract: The present disclosure provides a method, an apparatus and a system for calibrating a panoramic surround view system. The method includes: when receiving a calibrating start-up operation, generating a projection instruction, and sending the projection instruction to a projection device control module; receiving a plurality of target photographs acquired by a plurality of surround view cameras, the plurality of target photographs including a preset pattern projected by a projection device of a vehicle on the ground around the vehicle; and generating target calibrating data of the surround view cameras according to the plurality of target photographs. In the present disclosure, the projection device of the vehicle can be controlled to project the preset pattern on the ground around the vehicle, and the target calibrating data of the surround view cameras is generated according to the plurality of target photographs containing the preset pattern.

Abstract: Provided are an automatic parking control method and apparatus, relating to the industrial field of vehicles. The method comprises: when a speed of a vehicle is in a preset speed range and a time that the speed of the vehicle is in the preset speed range is greater than or equal to a preset time, collecting image data and radar data around the vehicle; inputting the image data and the radar data into a preset convolutional neural network model, and outputting at least one parking slot information; selecting target parking slot information according to a received parking-in selection operation; and according to the target parking slot information, generating a vehicle parking-in track for the vehicle to automatically park according to the vehicle parking-in track.

Abstract: A water injection method for a PID control-based adaptive intelligent water injection system is provided. The system includes a water injection portion, a power portion, a control portion, and a measurement and transmission portion. The water injection portion includes a hydrogenation reactor, heat exchangers, air coolers, and a separation tank. The power portion includes a motor and a water pump. The control portion includes a console and a bus. Temperature, pressure and flow velocity transmitters are additionally arranged at each of inlet and outlet pipes of various heat exchangers, and water injection points are disposed. Temperature, pressure and flow velocity signals of the inlet and outlet pipes of heat exchange devices are monitored, and the console performs error analysis on the three signals and uses a PID control algorithm to control the adjustment valve to alter the valve opening degree to adjust the water injection amount in real time.

Abstract: A device for testing mixed-mode fatigue crack growth rate includes a plate-like specimen, and a first fixture mechanism for exerting stretch, shear and torsion actions on the specimen via a second fixture mechanism. The second fixture mechanism is used for clamping the specimen and enabling the specimen to generate a mixed-mode fatigue crack in cooperation with the first fixture mechanism. The device further comprises a fatigue crack measurement instrument for measuring and recording the length of mixed-mode fatigue crack generated on the specimen.

Abstract: A device for testing mixed-mode fatigue crack growth rate comprises a plate-like specimen, and a first fixture mechanism for exerting stretch, shear and torsion actions on the specimen via a second fixture mechanism; the second fixture mechanism is used for clamping the specimen and enabling the specimen to generate a mixed-mode fatigue crack in cooperation with the first fixture mechanism; the device further comprises a fatigue crack measurement instrument for measuring and recording the length of mixed-mode fatigue crack generated on the specimen.