Question :- Ecommerce company is trying to identify returning active users. A returning active user is a user that has made a second purchase within 7 days of any other of their purchases. Write a SQL ...

Abstract: This article investigates the application of using error-related potential (ErrP)-based brain–computer interface (BCI) paradigm to control robot movements with implicit commands. ErrP is a ...

Abstract: Seismic simulation shaking table plays a key role in many industrial structural dynamic experiments. High-precision waveform repetition has a great impact on the experimental accuracy of ...