Abstract: The disclosure relates to a method, apparatus, readable medium, and electronic device for live stream interaction. The method includes: in accordance with displaying of a first control at a first target position of a live stream interface, obtaining a first duration during which a user watches the live stream interface; in accordance with a determination that the first duration is greater than or equal to a first predetermined duration threshold, switching the first control to a second control, and displaying the second control at a second target position of the live stream interface; and in response to a first operation command performed by the user on the second control, allocating a virtual resource to the user. In this way, interaction modes of a live stream room are enriched, and an activity level of the live stream room can be improved.

Abstract: A method for controlling a traffic light, a method and apparatus for navigating an unmanned vehicle and a method and apparatus for training a model are provided. An implementation comprises: generating a reinforced traffic light state parameter according to vehicle state representation information of an unmanned vehicle currently contained in a preset area of a target traffic light and a current traffic light state parameter of the target traffic light; and generating a traffic light control action according to the reinforced traffic light state parameter; where the reinforced traffic light state parameter is used to cause an unmanned vehicle navigation end to generate a reinforced vehicle state parameter according to a reinforced traffic light state and a current vehicle state parameter of a target unmanned vehicle, and generate an unmanned vehicle navigation action according to the reinforced vehicle state parameter.

Abstract: A friction stir welder includes a clamp mounted about the head from which the welding pin protrudes, with the head being extendable into and retractable from the clamp to insert and remove the welding pin from the area between the clamp halves (wherein a workpiece to be welded may be fit). The interiors of the clamp halves include rollers for engaging the workpiece, with at least one of the rollers being driven to feed the workpiece between the clamp halves and thereby move the workpiece with respect to the welding pin. Thus, the clamp halves may be closed about a workpiece, the welding pin can be driven into the clamped workpiece, and the workpiece can then be fed through the clamp halves to move the welding pin about the workpiece.