50.1 Introduction 50.2 Defining Equations Piezoelectricity and Electrostriction. Electrostriction and V. Sundar and Compliance Matrices Magnitudes and Signs of Electrostrictive R.E. Newnham Coefficients

49.1 Introduction 49.2 Mechanical Characteristics Applications. Structure of Ferroelectric and Piezoelectric Materials 49.3 Ferroelectric Materials K. F.Etzold Electrical Characteristics

48.1 Introduction 48.2 Propagation in Solids 48.3 Piezoelectric Excitation Gerald. Farnell 48.4 One-Dimensional Propagation McGill University 48.5Transducers 48.1 Introduction

47.1 Introduction 47.2 SAW Material Properties 47.3 Basic Filter Specifications 47.4 SAW Transducer Modeling The SAW Superposition Impulse Response Transducer

46.1 Introduction 46.2 Transduction Mechanisms Piezoelectricity Magnetostriction. Electrodynamic. Electrostatic. Magnetic. Hydraulic. Fiber Optic.Parametric Transducers. Carbon Microphones 46.3 Sensitivity and Source Level 46.4 Reciprocity

45.1Introduction 45.2 Background Discussion Modeling as a Transfer Function. Some Issues Involved i

44.1 Introduction 44.2 The Field equations Low Frequency Fields. Statics Limit 44.3 Numerical Methods C. W. Trowbridge

43. 1 Introduction 43.2 Amplifiers 43.3 Oscillators 43.4 Multipliers

一.填空(每空1分,共20分) 请按下面空中的编号顺序写出答案。 1.设一离散无记忆信源的输出由四种不同的符号组成,它们的出现概率分别为1/2、1/4、 1/8、1/8,则此信源平均每个符号包含的信息熵为bit符号若信源每毫秒发出一 个符号,那么此信源平均每秒输出的信息量为②bits

一、填空(每空1分,共16分) 1.调相信号()=2cos[2+Km(),其解析信号(即复信号)的表达式为 其复包络的表示式为