华侨大学：《信号与系统》课程教学资源（PPT课件讲稿，机电版）证明2-1 冲激函数抽样性质证明

若x1 (t)周期为T1，x2 (t)周期为T2；

例题设计满足下列技术指标的切比雪夫低通滤波器:

福州大学：《液压与气压传动》课程电子教案（PPT教学课件）Chapter 12 Pneumatics Transmission System Examples

福州大学：《液压与气压传动》课程电子教案（PPT教学课件）Chapter 11 Basic Circuits and their Application

10.1 Air Supply Devices 10.2 Pneumatic Pneumatic Attachments 10.3 Pneumatic Actuators 10.4 Pneumatic Regulating Valves

7.1 Pressure Control Circuits 7.2 Speed Control Circuits 7.3 Directional Control Circuits 7.4 Multi-actuator Control Circuits

6.1 Accumulators 6.2 Filters 6.3 Reservoirs 6.4 Piping/Tubing Connectors 6.5 Seals and Sealing Devices

3.1 Introduction 3.2 Piston Pumps 3.3 Vane Pumps 3.4 Gear Pumps

2.1 Performances of the Hydraulic Oil 2.2 Hydrostatics 2.3 Hydrodynamics 2.4 Characteristics of Fluid Flow in Pipeline 2.5 Flow Rate and Pressure Features of Orifice 2.6 Hydraulic Shock and Cavitation