Hello, developer, you wrote: D> 1. Than it in essence differs from the Database, from algorithm. At the heart of its operation any other principles lie? D> 2. What means "to train "? Here, as correctly above speak, it is better to read the textbook, than a forum. D> 3. In what advantage before algorithm producing data array statistic analysis consists? At statistical analysis, the author of algorithm sets the signs which statistican to consider. For example, an average and a dispersion, either the histogram, or an amount of sharp transitions above a certain limit, . can select demanded statistical signs from the crude data, and already on their basis to learn to classify. For tasks, type of pattern recognition and of some others it gave the big break in accuracy of results.