The operation of and design approaches to mechanical and piezoelectric(压电的) electric wave filters(滤波器) are discussed.
(本章)讨论机械滤波器和压电电波滤波器的工作情况和设计方法。
举一反三
- The sound wave is (). A: Mechanical transverse wave B: Mechanical longitudinal wave C: Electromagnetic wave D: X<br/>rays.
- How to produce ultrasound wave? A: negative piezoelectric effect of transducer B: Piezoelectric effect of transducer C: Thermal effect of transducer D: The magnetic effect of transducer
- What kind of wave does ultrasound belong to and has certain radiation? A: Electromagnetic wave B: Mechanical wave C: Particle wave D: Light wave
- 中国大学MOOC: In mechanical design, what the design must achieve is .
- The Wartsila RT-flex and MAN Diesel& Turbo()ME engine designs offer similar approaches to the electronic control of starting air and also to the electronic control and ____operation of the exhaust valve. A: mechanical B: Pneumatic C: hydraulic D: automatic
内容
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A record of electric wave occurring in the brain is called _______.
- 1
A<br/>piezoelectric crystal is used to produce the ultrasound waves. What<br/>kind of ultrasound is produced? () A: Pressure<br/>wave ultrasound B: Electrical<br/>wave ultrasound C: Sound<br/>wave ultrasound D: Simple<br/>ultrasound
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The fundamental principle in accordance with which all energy transformation in an electric circuit takes place has been already discussed.
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In mechanical design, what the design must achieve is . A: physical size B: principle C: function requirements D: mechanism
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中值滤波器和（）。 A: 最大值滤波器可能有相同的滤波结果 B: 最大值滤波器不可能有相同的滤波结果 C: 中点滤波器可能有相同的滤波结果 D: 中点滤波器不可能有相同的滤波结果