Abstract: The invention provides a battery pack, a method and a vehicle. The battery pack battery has a cell group. The cell group comprises a lithium iron phosphate cell and a ternary lithium-ion cell, wherein the lithium iron phosphate cell and the ternary lithium-ion cell are arranged in series with each another.

Abstract: Systems and methods for determining a marketing strategy for an online to offline service are provided. A method may include: obtaining a plurality of historical vectors, determining a first value function according to a first reinforcement learning algorithm based on the plurality of historical vectors, determining a first value under a state of a driver to provide the online to offline service based on the first value function and the plurality of historical vectors, and obtaining a first regression model by training an initial model, wherein the plurality of historical vectors are inputs of the initial model, and the first value under the state is a label of the initial model.

Abstract: Systems and methods for determining a marketing strategy for an online to offline service are provided. A method may include: obtaining a plurality of historical vectors, determining a first value function according to a first reinforcement learning algorithm based on the plurality of historical vectors, determining a first value under a state of a driver to provide the online to offline service based on the first value function and the plurality of historical vectors, and obtaining a first regression model by training an initial model, wherein the plurality of historical vectors are inputs of the initial model, and the first value under the state is a label of the initial model.