通过分析生物阻抗测量系统的需求，设计了一种应用于生物阻抗测量的混频激励电流源。
A mixing frequency excitation current source is designed according to the analysis of requirements of the bioelectric impedance measuring system.
激励源既可以为电压源又可以为电流源。
The exciting source can be both voltage source or current source.
本文针对提高重建图像质量的要求，对对称的双电流源激励模式下的图像成像算法进行了深入研究，并提出了改进方案。
This thesis presents a deeply research work of dual-current source image reconstruct algorithms in ERT research aimed at increasing the quality of reconstruction image, and proposes improving plans.
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