Objective To transmit ECG signals through a portable dual-mcu ECG holter based dual-port RAM.Methods Dual-port RAM had two independent address,data and control buses,which allowed the two processors accessed it's resource independently at different time.The master processor buffered the acquired data on its RAM until the data accumulated to 200 Bytes.Then the 200 Bytes would be transferred into the dual-port RAM at one time.The slave processor was informed to fetch the data when it reached the flash's one whole page.Results Problems in such aspects were conquered as the port contention of dual-port RAM,limiting sampling frequency,data sharing between the master and slave processors as well as acquiring signals by the cache.Conclusion The portable dual-mcu ECG holter based dual-port RAM can be applied to transmission of ECG signals.

This article analyzes the forward and backward feedback pathways between cones and horizontal cells in the Cascade model and sets up a Hopfield Network to simulate the interaction mechanism.Additionally,it appears that the phase character of horizontal cell is connected with spectrum and a CMAC Network is established to simulate the mapping process.This article aims to indicate that the mapping of horizontal cell and spectrum might be the underlying way for retina to code the signal from spectral input.