Abstract: This application relates to a lidar device, a lidar cleaning method, and a vehicle. An example lidar device includes a cleaning apparatus and a control unit. The control unit is configured to: determine a to-be-cleaned area of a lidar window based on location information of a shielding object on the lidar window, and control the cleaning apparatus to clean the to-be-cleaned area of the lidar window.

Abstract: Provided is a micro-nano fluidic substrate, a chip, a preparation method, and a system. The micro-nano fluidic substrate includes: a base; an electrode layer located on the base, the electrode layer includes a first electrode, a second electrode, and a control electrode; and a film layer located on the electrode layer and far away from the base, the film layer includes a groove layer, a nano-channel and a micro-channel, the groove layer includes a first groove, the nano-channel is located in the first groove, an orthographic projection of the nano-channel on the base at least partially coincides with an orthographic projection of the control electrode on the base, and the micro-channel is in communication with the nano-channel, the micro-channel includes a first micro-channel and a second micro-channel, and the first micro-channel is in communication with the first electrode, the second micro-channel is in communication with the second electrode.

Abstract: A method for identifying a potential landslide hazard of a reservoir bank based on a rock mass degradation feature, includes: determining a remote sensing interpretation identification mark of a potential landslide hazard site induced by rock mass degradation of a hydro-fluctuation belt of a bank slope, and establishing a potential landslide hazard site catastrophe evolution identification model; obtaining an orthoimage of a degradation belt, performing preliminary remote sensing interpretation on the orthoimage, and delineating an area prone to landslide; obtaining an oblique real-scene three-dimensional model of the area prone to landslide by the orthoimage, generating digital elevation model (DEM) data according to the oblique real-scene three-dimensional model for remote sensing fine interpretation, and identifying and extracting the mark; and inputting the mark into the potential landslide hazard site catastrophe evolution identification model to identify a catastrophe evolution mode of the potential lan

Abstract: A system for authorizing an operation is provided. The system may acquire motion data collected by a wearable device. A mobile terminal may determine whether the motion data matches with a physical motion for verification. If the motion data matches with the physical motion for verification, the mobile terminal may be authorized to perform a predetermined operation corresponding to the physical motion for verification. Thus, a user's identity may be verified based on the wearable device that collects motion data.

Abstract: A system for authorizing an operation is provided. The system may acquire motion data collected by a wearable device. A mobile terminal may determine whether the motion data matches with a physical motion for verification. If the motion data matches with the physical motion for verification, the mobile terminal may be authorized to perform a predetermined operation corresponding to the physical motion for verification. Thus, a user's identity may be verified based on the wearable device that collects motion data.