Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for generating an output that characterizes a scene at a current time step. In one aspect, one of the systems include: a voxel neural network that generates a current early-stage feature representation of the current point cloud, a fusion subsystem that generates a current fused feature representation at the current time step; a backbone neural network that generates a current late-stage feature representation at the current time step, and an output neural network that generate an output that characterizes a scene at the current time step.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for training a machine learning model on training data. In one aspect, one of the methods include: obtaining a training data set comprising a plurality of training inputs; obtaining data defining an original search space of a plurality of candidate data augmentation policies; generating, from the original search space, a compact search space that has one or more global hyperparameters; and training the machine learning model on the training data using one or more final data augmentation policies generated from the compact search space.

Abstract: A hub bearing and a seal device therefore are disclosed. In one example, the hub bearing seal device includes inner and outer rings, a ring-shaped seal, and a seal retaining ring. A metallic framework is provided inside the seal. The seal is fixed to the outer ring via the metallic framework and a seal lip edge is provided on the metallic framework of the seal. The seal lip edge is in contact with the seal retaining ring in interference fit. The seal is further provided with another layer of metallic framework having a different thermal expansion coefficient from that of the metallic framework. Together, the metallic frameworks form a bimetallic sheet type framework. During the operation of the seal device, the bimetallic sheet type framework can adjust the amount of interference between the seal lip edge and the seal retaining ring dynamically according to temperature change.

Abstract: A hub bearing and a seal device therefore are disclosed. In one example, the hub bearing seal device includes inner and outer rings, a ring-shaped seal, and a seal retaining ring. A metallic framework is provided inside the seal. The seal is fixed to the outer ring via the metallic framework and a seal lip edge is provided on the metallic framework of the seal. The seal lip edge is in contact with the seal retaining ring in interference fit. The seal is further provided with another layer of metallic framework having a different thermal expansion coefficient from that of the metallic framework. Together, the metallic frameworks form a bimetallic sheet type framework. During the operation of the seal device, the bimetallic sheet type framework can adjust the amount of interference between the seal lip edge and the seal retaining ring dynamically according to temperature change.