Dido and Aeneas in three sections, and then disperse. "The palace" Dido and Belinda enter, shocked at Aeneas’ disappearance. Dido is distraught and Belinda comforts her. Suddenly Aeneas returns, but Dido is full of fear before Aeneas speaks, and his words only serve to confirm her suspicions. She derides his reasons for leaving, and even when Aeneas says he will defy the gods and not leave Carthage, Dido rejects him for having once thought of leaving her. After Dido forces Aeneas to leave, she states that "Death must come when he is gone." The opera and Dido's life both slowly come to a
DIDO (software) to maneuver the International Space Station to perform the zero-propellant maneuver. Since this flight demonstration, DIDO was used for the International Space Station and other NASA spacecraft. It is also used in other industries. DIDO is also available as a MATLAB "toolbox" product. It does not require the MATLAB Optimization Toolbox or any other third-party software like SNOPT or IPOPT or other nonlinear programming solvers. The MATLAB/DIDO toolbox does not require a "guess" to run the algorithm. This and other distinguishing features have made DIDO a popular tool to solve optimal control problems. The MATLAB optimal control toolbox has been