Q vector convergence band has indicative significance for the heavy rain. Specially, Q vector analysis is more beneficial when the weather influence system is not obvious.

Support vector machine (SVM) is a new general learning machine, which analyzes the consistency of learning and speed of convergence from structure risk minimization principle.

The thesis describes some solutions for the slow convergence (count to infinite) problem in Vector-Distance algorithm in TCP/IP and points some shortages of them.