Abstract: A motorized latch retraction system for transitioning a latch of an exit device from a latched position to an unlatched position is provided. The motorized latch retraction system includes a lock indicator indicating the latched or unlatched position of the latch and a floating motor.

Abstract: The present invention discloses a prediction method for a maximum velocity profile in a wave boundary layer based on velocity defect functions. The method overcomes the theoretical defects of the existing velocity defect functions. That is, the velocity profile in a turbulent wave boundary layer cannot be realized; and in addition, without the assumption of linear wave conditions, the method is suitable for nonlinear waves and at the same time, for a small A/k, range, and can be extended to the analysis and prediction for the maximum velocity profile under the condition that the spatial distribution of roughness elements of gravel seabed, etc. obviously affects the flow structure of the boundary layer. The present invention can be directly applied to the analysis and prediction for physical quantities/processes, such as characteristics of the wave boundary layer, stress of underwater structures, and starting and transport of submarine sediments.

Abstract: A packaging box for a bulb lamp is provided, including an enclosure hoody having a cavity inside. An outer side wall of the enclosure body forms an outer side wall of the packaging box, the enclosure body is capable of enclosing the bulb lamp in the cavity along an circumferential direction of the bulb lamp, an inner circumferential surface of the enclosure body has at least one press-contact portion capable of abutting against the bulb lamp, the press-contact portion is capable of pressing against and tightly holding an outer periphery of the bulb lamp, so that the bulb lamp is capable of being stabilized in the cavity.

Abstract: The present disclosure relates to systems and methods for providing online to offline services. The systems and methods may obtain a plurality of historical positions of a user terminal within a first predetermined time period in a plurality of days. The systems and methods may identify at least one candidate area based on the plurality of historical positions of the user terminal. The systems and methods may identify one or more of the at least one candidate areas as one or more active areas of the user terminal. The systems and methods may further provide data associated with one or more service requests relating to the one or more active areas to a customer application executed by the user terminal.

Abstract: A motorized latch retraction system for transitioning a latch of an exit device from a latched position to an unlatched position is provided. The motorized latch retraction system includes a lock indicator indicating the latched or unlatched position of the latch and a floating motor.

Abstract: The present disclosure relates to systems and methods for providing online to offline services. The systems and methods may obtain a plurality of historical positions of a user terminal within a first predetermined time period in a plurality of days. The systems and methods may identify at least one candidate area based on the plurality of historical positions of the user terminal. The systems and methods may identify one or more of the at least one candidate areas as one or more active areas of the user terminal. The systems and methods may further provide data associated with one or more service requests relating to the one or more active areas to a customer application executed by the user terminal.