Abstract: Disclosed is a process for preparing Compound 8: (8) comprising the step of reacting Compound of 7: (7) wherein R is C1-8 alkyl or benzyl in the presence of a base. Also disclosed are intermediates and processes for preparing the intermediates.

Abstract: A non-pneumatic tire includes beads, apexes, an inner liner, a cushion ply, a tread rubber, sidewall rubbers, and a first carcass ply; and further includes sidewall support layers and a crown support layer. The sidewall support layers are located at the locations of sidewalls and interposed between the inner liner and the first carcass ply. The crown support layer is located at the location of a crown, and interposed between the inner liner and the first carcass ply or between the first carcass ply and the cushion ply. Both ends of the crown support layer respectively extend toward the sidewalls and are partly overlapped with the sidewall support layers.

Abstract: A method, a device and an apparatus for generating a defensive driving strategy and a storage medium are provided. The method includes: detecting a type of each obstacle of a plurality of obstacles in a sensible range of an autonomous vehicle; determining whether there is a collision risk of the autonomous vehicle with the obstacle by using a collision risk detection method corresponding to the type; and determining the defensive driving strategy for the autonomous vehicle when the obstacle has a collision risk with the autonomous vehicle in the sensible range. According to the embodiments, an occurrence probability of a dangerous condition on a road may be reduced.

Abstract: A method and an apparatus for planning a speed of an autonomous vehicle, and a storage medium are provided. The method includes: generating a plurality of speed trajectories to be selected for the autonomous vehicle before the autonomous vehicle changes a lane; obtaining predicted speeds and predicted positions of an obstacle at the plurality of time points; calculating a cost function value of each of the speed trajectories to be selected, according to the plurality of speed trajectories to be selected, the predicted speeds and the predicted positions; and selecting a speed trajectory to be selected with a minimum cost function value as a planning speed trajectory of the autonomous vehicle. A speed of the autonomous vehicle can be adjusted before the autonomous vehicle changes a lane, thereby creating an opportunity and a safe distance for the lane change, and improving a success rate of the lane change.

Abstract: A velocity trajectory generation method and apparatus, and a storage medium are provided. The method includes: setting starting point time, intermediate point time and terminal point time of a velocity trajectory to be generated, wherein the velocity trajectory includes a first velocity sub-trajectory: and a second velocity sub-trajectory; generating multiple first velocity sub-trajectories corresponding to a starting point velocity between the starting point time and the intermediate point time, according to the starting point velocity and multiple intermediate point velocities; and generating, for each of the first velocity sub-trajectories, multiple second velocity sub-trajectories between the intermediate point time and the terminal point time according to multiple terminal point velocities. A velocity trajectory which is more in line with a human driving characteristic may be generated, the comfort level of a passenger may be improved, and an algorithm may be simplified.

Abstract: Disclosed is a process for preparing Compound 8: (8) comprising the step of reacting Compound of 7: (7) wherein R is C1-8 alkyl or benzyl in the presence of a base. Also disclosed are intermediates and processes for preparing the intermediates.