This saved the dedicated PC shared by 8 scales,improves the liability of the detection and measuring system and reduces the error resulted from signal transformation.

The general conditions are mainly introduced of structure, principle, signal transformation and the secondary screen circuit of the eustem circuit.

Vasodilatation of SO_2 derivatives and cAMP-PKA signal transduction;

The role of Smads and related transcription factors in the signal transduction of bone morphogenetic protein;

Advancements of signal transduction in myocardial ischemic postconditioning;

Abstract: This paper begins with the principle analysis of the dosing system of the proportion pump,and analyses the factors influencing the dosing accuracy, with the sequence of the signal converting process and points out the corresponding methods to solve them.