第一节 管理信息系统开发过程综述 第二节 管理信息系统的分析 第三节 管理信息系统的设计 第四节 管理信息系统的实施 第五节 信息系统的管理

Let be a band-limited signal with then is uniquely determined by its samples if where

6.1 The Magnitude-Phase Representation （ 幅度-相位） of the Fourier Transform

4.1 Representation of Aperiodic Signals :The Continuous-Time Fourier Transform

1. Continuous-time system 2. Discrete-time system

2.1 Discrete-time LTI Systems : The Convolution Sum （卷积和） 2.1.1 The Representation of Discrete-Time Signals in Terms of impulses

1. is absolutely summable, 2. has finite energy

对外经济贸易大学：《管理信息系统》课程教学资源（课件讲稿，实践部分）第11章 数据库系统实例

Chapter 1 Signals and Systems (1) A simple RC circuit Source voltage Vs and Capacitor voltage Vc (2) An automobile

6.23 Shown in Figure 6.23 is for a lowpass filter. Determine and sketch the impulse response of the filter for each of the following phase characteristics: