A consistent nonperturbative approach to study nucleon property and hadronic physics is also discussed.

Solving consistently this set of WT relations, we obtain the nonperturbative fermion-boson vertex function, which leads to consistently truncated and closed Dyson-Schwinger equations for the propagators up to the quantum anomaly, thus providing the consistent nonperturbative approach of studying hadronic physics.

By presenting the prototypes of underwater telemetry and telecontrol, underwater digital acoustic communications, underwater visual image transmission which we have studied and implemented, the key techniques of an anti-mutipath acoustic transmission system in the choice of signal design and signal processing are discussed.