In order to solve the two differential-difference equations, a systematic algebraic algorithm is given.
为了求解这两个微分差分方程，给出一个系统的代数算法。
2
They are described by ordinary difference equations, or in some cases by purely algebraic equations.
这些系统能够用定常差分方程，有时甚至能用代数方程来描述。
3
The algebraic expressions of enthalpy flux and mass flow rate in regenerator as well as the phase difference between pressure and mass flow rate at pulse tube cold end are presented.