东大测试技术基础X21春《测试技术基础》在线平时作业1题目-东北大学-无忧答案网

100分 发表于 2021-3-9 10:26:19

东大测试技术基础X21春《测试技术基础》在线平时作业1题目

测试技术基础X21春学期《测试技术基础》在线平时作业1
1.[单选题] 记录磁带慢录快放，放演信号的频谱带宽（ ）
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A.变窄，幅值压低
B.扩展，幅值压低
C.变窄，幅值增高
D.扩展，幅值增高
答:——B——
2.[单选题] <span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">下面对线性系统的输入、输出间关系表述正确的是<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><img width="487" height="114" alt="" src="http://file.open.com.cn/ItemDB/65628/52474db7-d4aa-4bb4-8c62-f34e981d1a50/2014614123339138.jpg" />
A.A
B.B
C.C
D.D
答:——B——
3.[单选题] <span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">有一测力电桥<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><img width="523" height="181" alt="" src="http://file.open.com.cn/ItemDB/65628/4c9e5dda-5a0f-4750-9c58-28dbdc939929/201461516177117.jpg" />
A.A
B.B
C.C
D.D
答:——A——
4.[单选题] end<img height="280" alt="" width="508" src="http://file.open.com.cn/ItemDB/65628/8e5c0a21-be63-4dd6-8156-69031564e0be/201021112127372.jpg" />
A.A
B.B
C.C
D.D
答:————
5.[单选题] <span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">满足不真测试条件的测试系统，其幅频特性和相频特性为（<span style="FONT-FAMILY: "Times New Roman"; COLOR: red; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体" lang="EN-US"> <span style="FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">）<span style="FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><img width="487" height="107" alt="" src="http://file.open.com.cn/ItemDB/65628/422c8181-1a45-4e0b-83ff-5592598355f1/2014614123831243.jpg" />
A.A
B.B
C.C
D.D
答:————
6.[单选题] 按照奈奎斯特采样定理，采样频率至少为（）（A）有用的最高频率的一半(B)有用的最高频率的两倍(C)与有用的最高频率相同(D)有用的最高频率的3倍
A.A
B.B
C.C
D.D
答:————
7.[单选题] <span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">两个信号叠加:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><img width="597" height="143" alt="" src="http://file.open.com.cn/ItemDB/65628/890c97bd-5f0a-4320-809c-f8ca9e0bde7d/2014610214012968.jpg" />
A.A
B.B
C.C
D.D
答:————
8.[单选题] <span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">频域信号与<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">相应的时域信号<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><img width="599" height="103" alt="" src="http://file.open.com.cn/ItemDB/65628/0549f5f9-723c-4e46-b0dd-01231894a0c9/2014610215237898.jpg" />
A.A
B.B
C.C
D.D
答:————
9.[单选题] 不失真的幅频相频特性<img height="127" width="443" alt="" src="http://file.open.com.cn/ItemDB/65628/37d66957-5efd-4a2d-9ae3-d623287dd384/201021145346144.jpg" />
A.A
B.B
C.C
D.D
答:————
10.[单选题] 选择题:由两个时间具有少量频率差的波形引起的拍频等于（）（A）两个频率的平均（B）两个频率的和（c）两个频率的差（D）两个频率之比
A.A
B.B
C.C
D.D
答:————
11.[判断题] 概率分布函数是概率密度函数的导数。
A.错误更多答案进 ap5u.com大工q7 612 960 21
B.正确
答:————
12.[判断题] 对于磁电感应式扭矩测量，当转轴受扭矩时，两线圈输出信号相位差不为零，且随两齿轮所在横截面之间相对扭转角的增加而加大，其大小与相对扭转角、扭矩成正比。（ ）
A.错误
B.正确
答:————
13.[判断题] 周期信号与随机信号的互相关函数为1。（）
A.错误
B.正确
答:————
14.[判断题] 判断题电涡流式位移传感器是一种非接触式测振传感器，但被测件的表面粗糙度对测量影响很大。
A.错误
B.正确
答:————
15.[判断题] <span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">直流电桥的平衡条件为 <img width="169" height="58" alt="" src="http://file.open.com.cn/ItemDB/65628/f5ca4835-6457-4e96-9df0-9e7e03cb6cd2/2014615101429833.jpg" /> <span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold"> <span style="FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 14pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">（ ）
A.错误
B.正确
答:————
16.[判断题] 判断题 3 互相关函数为实偶函数，即<img width="113" height="36" alt="" src="http://file.open.com.cn/ItemDB/65628/1c06a244-b285-447b-8957-68f6bd9fa1e1/201461210525228.jpg" />（ ）
A.错误
B.正确
答:————
17.[判断题] 记录长时间慢变化信号可以选用光线示波器。（ ）
A.错误
B.正确
答:————
18.[判断题] 任何样本的时间平均等于总体平均的随机信号被称为各态历经信号。
A.错误
B.正确
答:————
19.[判断题] 电桥的四臂都是应变片，当处在相同的温度场时，温度引起电桥的输出为零。（ ）
A.错误
B.正确
答:————
20.[判断题] 信号处理环节的功能是对来自信号调理环节的信号，进行各种运算、滤波和分析。
A.错误
B.正确
答:————

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东大测试技术基础X21春《测试技术基础》在线平时作业1题目