西北农林科技大学：《单片机原理与接口技术》课程教学资源（试卷习题）chapter9 MCS-51 的接口技术

4.3 4.4 4.10 4.11 4.14 4.15 4.24 4.25 4.32 4.35 4.36 4.37 4.43

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

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

9.1 The Laplace Transform 1. The relationship 2. Region of Convergence（收敛域）

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

1. is absolutely summable, 2. has finite energy

对于机械设计，一般经历以下几个阶段： 1. 概念设计 2. 初步设计 3. 详细设计