东大测试技术基础X20秋学期《测试技术基础》在线平时作业3题目-东北大学-无忧答案网

作业辅导 发表于 2020-9-11 09:45:17

东大测试技术基础X20秋学期《测试技术基础》在线平时作业3题目

测试技术基础X20秋学期《测试技术基础》在线平时作业3
1.[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" />
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A.A
B.B
C.C
D.D
答:——D——
2.[单选题] <span style="FONT-SIZE: 14pt; COLOR: red; FONT-FAMILY: 宋体; 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">选择题<span style="FONT-SIZE: 14pt; COLOR: red; FONT-FAMILY: 宋体; 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 height="136" alt="" width="415" src="http://file.open.com.cn/ItemDB/65628/92ce29c2-5b00-4cf5-8ddf-e9f6640c65cd/201013121193322.jpg" />
A.A
B.B
C.C
D.D
答:——C——
3.[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">矩形窗函数<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">傅里叶变换:<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"><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="614" height="136" alt="" src="http://file.open.com.cn/ItemDB/65628/49fc85b3-c5cc-4100-91d8-81ff09320944/2014610213636617.jpg" />
A.A
B.B
C.C
D.D
答:——A——
4.[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:————
5.[单选题] 传感器的动态特性越好，说明传感器的响应在被测频率范围内（ ）。
A.精度越高
B.精度越差
C.对被测信号的反应能力越快
D.对被测信号的反应能力越慢
答:————
6.[单选题] 选择题1. 概率密度函数曲线下的面积等于（）A. 0.1B. 0.7C. 1.0D. 2.0
A.A
B.B
C.C
D.D
答:————
7.[单选题] <span style="FONT-SIZE: 14pt; COLOR: red; FONT-FAMILY: 宋体; 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">选择题<span style="FONT-SIZE: 14pt; COLOR: red; FONT-FAMILY: 宋体; 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 height="91" alt="" width="577" src="http://file.open.com.cn/ItemDB/65628/0352e875-55ff-4399-b09b-045ba0d8ee0d/2010131211226348.jpg" />
A.A
B.B
C.C
D.D
答:————
8.[单选题] 傅立叶变换性质<img width="586" height="79" alt="" src="http://file.open.com.cn/ItemDB/65628/d70ab656-5ed5-4722-b17e-877fb9826613/201461021323562.jpg" />
A.A
B.B
C.C
D.D
答:————
9.[单选题] <img height="165" alt="" width="518" src="http://file.open.com.cn/ItemDB/65628/64de9c6d-05c1-4379-8ff0-88e82c9d4990/20102122813534.jpg" />end
A.A
B.B
C.C
D.D
答:————
10.[单选题] <span style="FONT-SIZE: 14pt; COLOR: red; FONT-FAMILY: 宋体; 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">选择题<img height="143" alt="" width="577" src="http://file.open.com.cn/ItemDB/65628/015bb9f8-e351-4fdd-a9a2-7cf618341889/20101312115316.jpg" />
A.A
B.B
C.C
D.D 更多答案请进 ap5u.com或q16478616401
答:————
11.[判断题] 调幅是将一个高频简谐信号（载波信号）与测试信号（调制信号）相乘，使测试信号的幅值随载波信号的变化而变化。（ ）
A.错误
B.正确
答:————
12.[判断题] 振动的激励方式有稳态正弦激振、瞬态激振、脉冲激振三种。（ ）
A.错误
B.正确
答:————
13.[判断题] 金属导体在外力作用下发生机械变形时，其机械变形(伸长或缩短)随着电阻值的变化而发生变化的现象，称为金属的电阻应变效应。（）
A.错误
B.正确
答:————
14.[判断题] 传感器的灵敏度越高，可以感知越小的变化量，即被测量稍有微小变化时，传感器即有较大的输出。
A.错误
B.正确
答:————
15.[判断题] 能用明确的数学关系式或图象表达的信号称为确定性信号。
A.错误
B.正确
答:————
16.[判断题] <span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; 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">相关系数<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; 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-fareast-font-family: 宋体"><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"></v:path><o:lock v:ext="edit" aspectratio="t"></o:lock></v:shapetype><v:shape id="_x0000_i1025" style="WIDTH: 20.25pt; HEIGHT: 18.75pt" fillcolor="window" o:ole="" type="#_x0000_t75"><v:imagedata o:title="" src="file:///C:\DOCUME~1\ibm\LOCALS~1\Temp\msohtml1\01\clip_image001.wmz"></v:imagedata></v:shape><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; 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">的取值范围处于<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; 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-fareast-font-family: 宋体">0<span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; 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 lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; 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-fareast-font-family: 宋体">1<span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; 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">之间。
A.错误
B.正确
答:————
17.[判断题] 输入量与输出量都是不随时间变化或变化缓慢的测试是静态测量。（ ）
A.错误
B.正确
答:————
18.[判断题] 在压磁式传感器中，当受外力F作用时，磁力线分布发生变化，部份磁力线和测量绕组交链，并在绕组中产生感应电势。（ ）
A.错误
B.正确
答:————
19.[判断题] 由于不正确地选择采样的时间间隔而引起频域上高低频之间彼此混淆的现象被称为叠混。（ ）
A.错误
B.正确
答:————
20.[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:————

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东大测试技术基础X20秋学期《测试技术基础》在线平时作业3题目