从表，图，和方程来解释和比较线性函数的特点。
Interpret and compare properties of linear functions from tables, graphs, or equations.
本文通过研究主动脉容积变化微分方程，导出了心阻抗图与心脏射血的非线性函数关系。
This paper derived a non-Linear function relationship between the cardiac impedance plethysmogram and the heart ejection by researching differential equation of the aortic volume change.
并采用各点点位位移速度图对所建立的函数模型进行验证，同时对状态方程的建立及初始值的选取进行分析总结。
Finally, it validated established model with each point displacement velocity chart, analyzed and summarized the established of state equation and selection of initial value at the same time.
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