Abstract: A boom extension device for a dockside container crane. A boom comprises a rear boom section (11) and a front boom section (12). The extension device comprises: an extension trolley tool (2) which is disposed below the rear boom section (11) and the front boom section (12) during an extension operation, and which comprises a wheel set (21), a trolley frame (22), a construction platform (23), and a movement track (24) disposed on the construction platform; a fits support frame trolley (31) disposed on the movement track (24) and used to carry a boom extension section (41) and guide the boom extension section (41) to move in a first direction; and a second support frame trolley (32) disposed on the movement track (24) and used to carry the front boom section (12) and guide the front boom section (12) to move in a second direction perpendicular to the first direction in a first plane. Further included is an extension method for a boom of a dockside container crane.

Abstract: Systems and methods for predicting a delivery time are provided. An example method includes: receiving one or more configurations for a merchant account associated with a merchant; providing to a machine-learning model parcel data corresponding to one or more products purchased from the merchant and the one or more configurations. The machine-learning model is trained based on historical parcel data, configurations, and delivery times to predict an estimated delivery time of one or more products. The method further includes receiving from the machine-learning model an estimated delivery time of the one or more products purchased from the merchant; obtaining updated parcel data corresponding to the one or more products; providing to the machine-learning model the updated parcel data to receive an updated estimated delivery time; and returning the updated estimated delivery time.

Abstract: A boom extension device for a dockside container crane. A boom comprises a rear boom section (11) and a front boom section (12). The extension device comprises: an extension trolley tool (2) which is disposed below the rear boom section (11) and the front boom section (12) during an extension operation, and which comprises a wheel set (21), a trolley frame (22), a construction platform (23), and a movement track (24) disposed on the construction platform; a fits support frame trolley (31) disposed on the movement track (24) and used to carry a boom extension section (41) and guide the boom extension section (41) to move in a first direction; and a second support frame trolley (32) disposed on the movement track (24) and used to carry the front boom section (12) and guide the front boom section (12) to move in a second direction perpendicular to the first direction in a first plane. Further included is an extension method for a boom of a dockside container crane.

Abstract: The present application provides an air duct machine with switchable air-out directions and a control method thereof, and an air-conditioning apparatus.

Abstract: The present application provides an air duct machine with switchable air-out directions and a control method thereof, and an air-conditioning apparatus.