Abstract: A method for equalizing battery capacities of a vehicle includes: determining, based on a current capacity of a battery of each of carriages, a largest battery capacity and a corresponding first carriage thereof, and a smallest battery capacity and a corresponding second carriage thereof; determining, based on the largest battery capacity and the smallest battery capacity, a first traction force and a second traction force, where the first traction force is greater than the second traction force; and outputting a first control command including the first traction force to the first carriage, and outputting a second control command including the second traction force to the second carriage for equalizing battery capacities of the carriages of the vehicle.

Abstract: An electrode assembly and a lithium ion electric roll having the same are provided. The electrode assembly includes: a first electrode unit; a first anti-puncture cushion; in which the first electrode unit includes a first electrode sheet, an second electrode sheet, and a separator, the second electrode sheet comprises a second top edge and a second bottom edge along the length direction of the first electrode unit; an edge of the first anti-puncture cushion exceeds the second electrode sheet from the second top edge or the second bottom edge along the length direction of the first electrode unit.

Abstract: An on-site reciprocity calibration method for a piezoelectric accelerometer, including a vibration test and a reciprocity test. In the vibration test, a sine excitation with a corresponding frequency and amplitude is provided by a vibration exciting device to the piezoelectric accelerometer fixed on a motion plane, and output signals of a drive port and a signal port of the reciprocal piezoelectric accelerometer are collected by a data acquisition device. In the reciprocity test, a sine voltage excitation is provided by a signal generator to the drive port, and then an excitation signal and an output signal of the signal port are collected by the data acquisition device. An amplitude ratio of the two signals is obtained based on signal sine-fitting. Finally, the on-site calibration is enabled according the sensitivity amplitude ratio obtained in the vibration test and the sensitivity amplitude product obtained in the reciprocity test.

Abstract: A shooting method is provided, including: obtaining position information of a shooting object; planning a first circumnavigation route and a second circumnavigation route for surrounding shooting of the shooting object based on the position information; controlling a UAV to move along the first circumnavigation route and the second circumnavigation route respectively; and controlling the UAV to shoot the shooting object by a camera mounted on the UAV during movement to obtain multiple images of the shooting object. Images collected on the first circumnavigation route and images collected on the second circumnavigation route share homologous image points of the shooting object. The images are used to establish a three-dimensional model of the shooting object. Thus, the shooting efficiency of the UAVs is improved for shooting images for three-dimensional reconstruction.

Abstract: An assessment method for seismic landslide hazard based on a LS-D-Newmark model is performed as follows. Historical landslide data is acquired, and a historical landslide density is determined. The historical landslide data is input into the LS-D-Newmark model, and model parameters are adjusted, such that a static safety factor Fs of a slope is greater than 1 in the absence of external forces. The historical landslide density is introduced to the LS-D-Newmark model, and assignment of the static safety factor Fs is optimized to obtain an optimized static safety factor Fs-L. A slope critical acceleration ac-L and an earthquake-induced slope displacement Dn-L, are calculated to calculate a landslide occurrence probability P of a target landslide region. An assessment device, a processing device, and a computer-readable storage medium for implementing the method are further provided.

Abstract: A punch and a die for stretching battery case body and its stretching process. The die includes a stepped punch as a male die, at least one thinning ring as a female die, and a variable-wall-thickness stretching step, which belongs to the thinning stretching. When the sheet or plate is stretched to the cup-shaped stretching piece by at least one-time forming stretching, and then through the thinning stretching to finally obtain the variable-wall-thickness battery case body with thin wall in the middle and thick wall at one end or both ends in the axial direction. The body can reduce the material consumption of the middle section of the case body and ensure the roll-sealing strength of one end or both ends, thus solving the problem between the amount of materials and the reliability of the roll sealing caused by the wall thickness of the battery case body.

Abstract: Embodiments of the present invention relate to a self-driving method and an apparatus. The method includes: sending, by a first vehicle, lane change request information and first real-time information to a network device; receiving, by the first vehicle, lane change indication information sent by the network device, where the lane change indication information is determined by the network device according to the first real-time information and second real-time information that is sent by a second vehicle, and the lane change indication information indicates that the first vehicle is allowed to perform lane change; and changing, by the first vehicle, from the first lane to the second lane according to the lane change indication information.

Abstract: An automatic driving navigation method, apparatus, and system, an in-vehicle terminal, and a server are provided. The method includes obtaining, by an in-vehicle terminal, satellite positioning data of a vehicle, receiving a differential positioning correction from a radio base station in a wireless network, and correcting the satellite positioning data using the differential positioning correction to obtain a high-precision location of the vehicle; providing, by the server, a lane level planning driving route to the in-vehicle terminal according to the high-precision location provided by the in-vehicle terminal and with reference to high-precision map information; and controlling, by the in-vehicle terminal according to the obtained high-precision location, the vehicle to automatically drive according to the lane level planning driving route.

Abstract: The present invention provides a navigation system, apparatus, and method. The navigation system includes a global navigation apparatus, a first roadside navigation apparatus, and a terminal navigation apparatus. The terminal navigation apparatus is configured to send, to the global navigation apparatus, a global path request used to request for a road-level global path. The global navigation apparatus is configured to: determine the global path according to the global path request, and send, to the terminal navigation apparatus, first indication information used to indicate the global path. The first roadside navigation apparatus is configured to: determine a lane-level local path according to the global path, and send, to the terminal navigation apparatus, second indication information used to indicate the local path.

Abstract: A converter includes a half-bridge circuit including first and second transistors that are connected in series, the half-bridge circuit is connected in parallel with a voltage input and includes a node connected to both the first and second transistors; a resonant inductor connected to the half-bridge circuit and the primary winding of a transformer; a resonant capacitor connected to the half-bridge circuit and the primary winding; a third transistor with a first terminal connected to the half-bridge circuit and a second terminal directly connected to a first terminal of the resonant inductor; and a rectification stage that is connected to the secondary winding of the transformer and that includes first and second synchronous rectifiers. The rectification stage does not use discrete diodes to provide rectification, and during voltage boost operation, the third transistor is turned on and off to maintain an output voltage level.

Abstract: An LLC resonant converter includes a first phase with a first primary circuit and a second phase with a second primary circuit. The first primary circuit includes a first shared inductor, and the second primary circuit includes a second shared inductor. The first and second shared inductors are connected in parallel with each other. The first and second primary circuits do not include a capacitor that is connected in parallel with each other.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.

Abstract: An LLC resonant converter includes a first phase with a first primary circuit and a second phase with a second primary circuit. The first primary circuit includes a first shared inductor, and the second primary circuit includes a second shared inductor. The first and second shared inductors are connected in parallel with each other. The first and second primary circuits do not include a capacitor that is connected in parallel with each other.

Abstract: A matrix rectifier includes a bridge x defined by phases A and B and a bridge y defined by phases A and C, in which each input phases A, B, and C includes two bi-directional switches connected in series. A method of operating the matrix rectifier includes operating the bridges x and y as independent full-bridge phase-shifted converters in each 60° interval between two successive zero-voltage crossings of the input phases A, B, and C. In a first 30° sector of each 60° interval, the bridges x and y are operated in a first vector sequence in every switching period, and the first vector sequence is divided into a sequence of x+, y+, 0, x?, y?, 0.

Abstract: Embodiments of the present invention relate to a self-driving method and an apparatus. The method includes: sending, by a first vehicle, lane change request information and first real-time information to a network device; receiving, by the first vehicle, lane change indication information sent by the network device, where the lane change indication information is determined by the network device according to the first real-time information and second real-time information that is sent by a second vehicle, and the lane change indication information indicates that the first vehicle is allowed to perform lane change; and changing, by the first vehicle, from the first lane to the second lane according to the lane change indication information.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.

Abstract: A converter includes a transformer including primary windings and secondary windings, switches connected to the primary windings, an output inductor connected to the secondary windings, and a controller connected to the switches. The controller turns the switches on and off based on dwell times calculated using space vector modulation with a reference current ref whose magnitude changes with time.

Abstract: An automatic driving navigation method, apparatus, and system, an in-vehicle terminal, and a server are provided. The method includes obtaining, by an in-vehicle terminal, satellite positioning data of a vehicle, receiving a differential positioning correction from a radio base station in a wireless network, and correcting the satellite positioning data using the differential positioning correction to obtain a high-precision location of the vehicle; providing, by the server, a lane level planning driving route to the in-vehicle terminal according to the high-precision location provided by the in-vehicle terminal and with reference to high-precision map information; and controlling, by the in-vehicle terminal according to the obtained high-precision location, the vehicle to automatically drive according to the lane level planning driving route.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.