The structure and parameters of the flexible neural tree model are optimized by probabilistic incremental program evolution and simulation annealing, respectively.

“Shenzhou 7 is an incremental but important step forward,” said Joan Johnson-Freese, an expert on the Chinese space program at the U.S. Naval War College in Rhode Island.

Start with a working program and make small incremental changes. At any point, if there is an error, you should have a good idea where it is.