2020 信号与系统（英文）(北京交通大学) 最新满分章节测试答案

文章目录[隐藏]

CHAPTER I – Course Overview Test on Chapter 1
CHAPTER II – Signal Analysis in the Time Domain Test on Chapter 2
CHAPTER III – System Analysis in the Time Domain Test on Chapter 3
CHAPTER IV – Signal Analysis in the Frequency Domain Test on Chapter 4
CHAPTER III – System Analysis in the Time Domain The CORRECT test on Chapter 3
CHAPTER V System Analysis in the Frequency Domain Test on Chapter 5
CHAPTER VI Laplace Transform Test on Chapter 6
CHAPTER VII z-Transform Test on Chapter 7

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-09-09到2020-12-20
本篇答案更新状态:已完结

CHAPTER I – Course Overview Test on Chapter 1

1、问题:Which of the below deterministic signals is a continuous-time energy signal: ( ).‍
选项：
A:
B:
C:
D:
答案: 【】

2、问题:Given a periodic continuous-time signal , what is the signal’s period and the average power ? ( )
选项：
A:
B:
C:
D:
答案: 【】

3、问题:Given the below relationships between the voltage and the current, please pick the system that is time-variant ( ).
选项：
A:
B:
C:
D:
答案: 【】

4、问题:Below are four discrete-time system and the relationship between the input, , the output, , and the initial state, is given for each of the systems. Which is not a linear system? ( )
选项：
A:
B:‍
C:
D:
答案: 【】

5、问题:Given the relationship between the input , the output , and the initial state , which of the systems is a linear system? ( )
选项：
A:
B:
C:
D:
答案: 【】

6、问题:Which of the below system is a time-invariant system? Given that or is the input of the system and or is the output. ( )
选项：
A:
B:
C:
D:
答案: 【】

7、问题:Given the difference equation of a discrete-time system is , then the system is ( ).
选项：
A:Causal and linear time-invariant.
B:Causal and linear time-varient.
C:Non-causal and linear time-invariant.
D:Non-causal and linear time-variant.
答案: 【Causal and linear time-invariant.】

8、问题:For a linear continuous-time system, when the initial state is and the input signal is , the output is , ; when the initial state is and the input signal is , the output is , . Then, what is the output when the initial state is and the input signal is ? ( )
选项：
A:
B:,
C:,
D:,
答案: 【, 】

CHAPTER II – Signal Analysis in the Time Domain Test on Chapter 2

1、问题:A sinusoidal signal can be represented by using imaginary exponential signal as ( )
选项：
A:
B:
C:
D:
答案: 【】

2、问题:Which one of the below descriptions of the imaginary exponential signal is NOT CORRECT (    )
选项：
A: Both the imaginary exponential siganl  and sine signal  are periodic signals with the fundamental peroid of  .
B:The imaginary exponential signal  can be represented as
C:Both the imaginary exponential siganl  and sine signal  can be linearly represented by the other signal, and thus, they have the same properties.
D:The greater the , the higher the oscillation frequency of the real and imaginary parts of the imaginary exponential signal .
答案: 【The imaginary exponential signal  can be represented as 】

3、问题:Given the waveform of a signal , as shown below, it can be represented as ( )
选项：
A:
B:
C:
D:
答案: 【】

4、问题: = ( )
选项：
A:
B:
C:
D:
答案: 【】

5、问题:The value of the integral is ( )
选项：
A:0
B:4
C:-4
D:2
答案: 【0】

6、问题:Which one of the below relations is WRONG ( ) ?
选项：
A:
B:
C:
D:
答案: 【】

7、问题:Which one of the below descriptions of the imaginary exponential sequence  is WRONG ( )?
选项：
A:The imaginary exponential sequence  is not necessarily periodic.
B: The imaginary exponential sequence  and sinusoidal sequences can represent each other using the Euler’s relation.
C: The imaginary sequence can be obtained by sampling from the continuous-time signal , therefore, they should have the same period.
D: The amplitude of the imaginary exponential sequence  may not increase as the angular frequency  increases.
答案: 【 The imaginary sequence can be obtained by sampling from the continuous-time signal , therefore, they should have the same period.】