Abstract: A lock, a vehicle parking system, and a vehicle parking method are provided. The lock includes a main body, a lock switch, a lock controller, a lock communication circuit, and a battery. The battery is connected to the lock switch, the lock controller, and the lock communication circuit, and configured to supply electrical energy to the lock switch, the lock controller, and the lock communication circuit. The lock communication circuit is connected to the lock controller, and transmits a locking instruction or an unlocking instruction to the lock controller when receiving the locking instruction or the unlocking instruction from a second device located outside the lock. The lock controller is connected to the lock switch connected to the main body, and the lock controller controls, when receiving the locking instruction or the unlocking instruction, the main body to perform a locking operation or an unlocking operation through the lock switch.

Abstract: A method and a system for predicting and using customer lifetime value (CLV). The method include: providing a classifier trained using customer feature data during a first period of time as input and whether there is spending during a second period of time as classifier label; providing a regressor trained using the customer feature data during the first period of time as input and amount of spending during a second period of time as regressor label; performing the classifier using customer feature data during a third period of time to obtain customers having positive predicted classifier labels; and performing the regressor using the customer feature data during the third period of time for the customers having positive predicted classifier labels, to obtain CLVs of the customers.

Abstract: A method and a system for predicting and using customer lifetime value (CLV). The method include: providing a classifier trained using customer feature data during a first period of time as input and whether there is spending during a second period of time as classifier label; providing a regressor trained using the customer feature data during the first period of time as input and amount of spending during a second period of time as regressor label; performing the classifier using customer feature data during a third period of time to obtain customers having positive predicted classifier labels; and performing the regressor using the customer feature data during the third period of time for the customers having positive predicted classifier labels, to obtain CLVs of the customers.

Abstract: An outdoor laminate floor includes a substrate made from PVC foaming and a wear-resistant, anti-aging covering film that is adhered to the surface of the substrate. The covering film overlays the surface of the substrate after being adhered by hot glue. The covering film is a modified weather-resistant polymeric film. In this way, the outdoor laminate floor has a simple and compact structure, and solid wood is replaced with the substrate and the covering film, which not only protects environment by reducing the use of solid wood, but also reduces the manufacturing cost and improves the competitive edge on the market, owing to the low-cost substrate and covering film.

Abstract: An outdoor laminate floor includes a substrate made from PVC foaming and a wear-resistant, anti-aging covering film that is adhered to the surface of the substrate. The covering film overlays the surface of the substrate after being adhered by hot glue. The covering film is a modified weather-resistant polymeric film. In this way, the outdoor laminate floor has a simple and compact structure, and solid wood is replaced with the substrate and the covering film, which not only protects environment by reducing the use of solid wood, but also reduces the manufacturing cost and improves the competitive edge on the market, owing to the low-cost substrate and covering film.

Abstract: An alkylation catalyst can include: a Brønsted acid ionic liquid; and a strong Brønsted acid that is not considered an ionic liquid. The Brønsted acid ionic liquid can be selected from the group consisting of [BMIm]HSO4, [MBSIm]HSO4, [MBSIm]OTf, [MPSIm]OTf, and [OMIm]HSO4 or the like. In one aspect, the strong Brønsted acid is selected from the group consisting of sulfuric acid, hydrochloric acid (HCl), hydrobromic acid (HBr), HF, hydrogen iodide (HI), phosphoric acid, trifluoromethanesulfonic (triflic) acid. In one aspect, the strong Brønsted acid is present at more than about 50 wt % of the composition; however, the Brønsted acid can vary from about 10 wt % to about 99 wt %, more preferably about 20 wt % to about 90 wt %, and most preferably about 40 wt % to about 80 wt %.