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以固定床的任意温度信号热响应实验为例，说明如何应用时域拟合法（Ｔｉｍｅ ＤｏｍａｉｎＣｕｒｖｅ Ｆｉｔｔｉｎｇ）对线性系统进行参数估值。并应用系统输入及响应信号的矩量讨论进行参数估值时所必须的实验范围。文中讨论可适用于一般线性系统。最后给出在数字计算机上，用 ＲＥＤＵＣＥ ２语言对系统矩量进行公式运算的程序。
An example of the thermal response of a fixed bed with arbitrary temperature signal is given to illustrate how to apply Time DomainCurve Fitting to estimate the parameters of a linear system. And apply the moments of system input and response signal to discuss the experimental range necessary for parameter estimation. The discussion in this paper can be applied to a general linear system. Finally, a program of formulating the system moment with REDUCE 2 on a digital computer is given.