More governments are rolling out chatbots in schools. Some experts warn the tools could erode teaching and learning.

Abstract: With the development of time, online education such as catechism is widely used, and it is difficult to meet the personalized learning needs of learners because of the difficulty of timely ...

Abstract: A type of multistate system executes multiple consecutive missions over a period, and maintenance activities are also performed sequentially during this period, to improve system reliability ...