If, as in sampling or digital systems, some elemental equations are defined or used only at discrete points in time, a discrete-time system is the result.
而假如，在采样问题或数字系统中常见这种情况，有些基础方程仅定义于，或仅能应用于离散的时间点上，这就导致了离散时间系统。
They also provide us with universal way to establish the discrete equations for large general program system.
为编制大型通用程序系统提供建立离散方程的统一方法。
At first, the application background of Kalman filter theory is introduced. Then, discrete Kalman filter equations are derived, and state equations of continuous system are discreted.
首先介绍了卡尔曼滤波理论的应用背景，然后推导了离散卡尔曼滤波方程，并对连续系统的状态方程进行离散化。
Section two gives the notations , lemmas and discrete schemes of the system of parabolic equations.
第二节给出所研究的具有初边值条件的一维抛物型方程组及其离散格式。
The unified method of solving LDS(linear discrete system) difference equations of determinate and time varying coefficients as well as stochastic and stochastic time varying coefficients is proposed.
首次给出求解确定性与随机常系数差分方程及确定性与随机时变系数差分方程的统一方法；
A discrete-variable or digital system has one or more variables known only at particular instants of time as in Fig. 2-2A-2b; the equations are difference equations.
离散系统或者数字系统，有一到两个变量只在特殊的时刻是确定的，如图2-2A-2b所示，其描述方程为差分方程。
A discrete-variable or digital system has one or more variables known only at particular instants of time as in Fig. 2-2A-2b; the equations are difference equations.
离散系统或者数字系统，有一到两个变量只在特殊的时刻是确定的，如图2-2A-2b所示，其描述方程为差分方程。
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