Abstract: A robot comprises a first part and a second part moveable relative to the first part. The robot operates in an audio output mode in which the first and second parts are in a first configuration relative to each other and in which the robot outputs audio from an array of speakers using an audio output technique. The robot operates in a user interaction mode in which the first and second parts are in a second, different configuration relative to each other and in which the robot interacts with a user. The robot is configured to change from the audio output mode to the user interaction mode in response to the robot detecting a trigger event. Changing from the audio output mode to the user interaction mode comprises causing the first part to lift up relative to the second part.

Abstract: The present disclosure relates to a realtime urban traffic status monitoring method based on privacy-preserving compressive sensing, including the following steps: step S1: dividing vehicle data under privacy preserving into two parts, and sending the two parts to two different road side units (RSU) for preprocessing; step S2: outsourcing, by the two different RSUs, preprocessed vehicle data to two cloud platforms (CP) respectively, and designing a data encryption execution protocol based on a finally expected operation result and interactive operation between the two CPs, to encrypt the data; and step S3: receiving, by a navigation service provider (NSP), encrypted data from the CPs, decrypting the received encrypted data, and estimating an urban traffic status by using a compressive sensing technology.

Abstract: The present disclosure relates to a realtime urban traffic status monitoring method based on privacy-preserving compressive sensing, including the following steps: step S1: dividing vehicle data under privacy preserving into two parts, and sending the two parts to two different road side units (RSU) for preprocessing; step S2: outsourcing, by the two different RSUs, preprocessed vehicle data to two cloud platforms (CP) respectively, and designing a data encryption execution protocol based on a finally expected operation result and interactive operation between the two CPs, to encrypt the data; and step S3: receiving, by a navigation service provider (NSP), encrypted data from the CPs, decrypting the received encrypted data, and estimating an urban traffic status by using a compressive sensing technology.

Abstract: A robot comprises a first part and a second part moveable relative to the first part. The robot operates in an audio output mode in which the first and second parts are in a first configuration relative to each other and in which the robot outputs audio from an array of speakers using an audio output technique. The robot operates in a user interaction mode in which the first and second parts are in a second, different configuration relative to each other and in which the robot interacts with a user. The robot is configured to change from the audio output mode to the user interaction mode in response to the robot detecting a trigger event. Changing from the audio output mode to the user interaction mode comprises causing the first part to lift up relative to the second part.

Abstract: A display device comprises first, second and third layers. The first layer is spaced apart from the second layer. The third layer is arranged between the first and second layers. The first layer comprises a display surface facing away from the second layer. The display surface is arranged to provide a display output. The second layer comprises a plurality of light-emitting elements. The third layer of the display device comprises a plurality of discrete guide channels. Each guide channel in the plurality of guide channels is arranged to guide light travelling from a respective light-emitting element in the plurality of light-emitting elements to the display surface. Different guide channels in the plurality of guide channels have different channel lengths.