This article proceeded with tri - nary baseband signal combining with binary ones, and then analyzed multi -nary digital baseband signal's frequency spectrum based on alternating wave and steady wave.

Combining the nonlinear control system theory and the aim of chaos synchronization, we designed a nonlinear feedback controller for synchronizing the scalar output signal of Chua's Circuits system.

Combining image signal processing technique, particle size information can be obtained by computing fractal dimension values, and then a new method for particle sizing will be developed in future.