non-constant positive solution 非常数正解
non-constant periodic solution 大范围周期解
non-constant positive solution existence 非常数正解的存在性
In general, special solution of non-homogeneous linear equation of constant coefficient of the second order is obtained by the method of undetermined coefficient, but it's process is too complicated.
二阶常系数非齐次线性微分方程的特解一般都是用“待定系数”法求得的，但求解过程都比较繁琐。
This paper gives an explicit solution to linear non-homogeneous recurrence relations with constant coefficients by means of generating function.
应用生成函数的方法求出了常系数非齐次线性递推式的显式解。
For the controllability of constant non linear system by using the progression method, the general progression solution of state equation is obtained.
针对定常解析非线性系统进行能控性分析，采用微分方程级数解法得到状态方程的一般级数解，用作能控性分析的基本依据。
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