differerce equation的用法和样例：
例句
- These results generalize and improve some known results about both neutral and delay difference equation.
所有结果推广和改进了关于中立和时滞差分方程已有结果。 - The unified differential equation is developed after making the stochastic excitation and observation noise be of equal dimensions.
将随机输入和观测噪声等维化处理后，建立了结构振动及其控制系统差分方程的统一模式。
