一、凸轮机构的应用:常用的高副机构自动机械和半自动机械装置中,实现运动比连杆(最多9个点)容易,使用广泛

Chapter 16: Concurrency Control Lock- Based Protocols(基于锁的协议) Timestamp-Based- Protocols(基于时间戳的协议) Validation-Based- Protocols(基于有效性检查的协议 Multiple Granularity(多粒度) Multiversion Schemes(多版本机制) Deadlock Handling(死锁处理)

Chapter 7: Relational Database Design First Normal Form Pitfalls in Relational Database Design Functional Dependencies Decomposition Boyce-Codd Normal Form Third Normal Form Multivalued Dependencies and Fourth Normal Form

Chapter 4: SQL Background Basic Structure Set Operations Aggregate Functions Null Values Nested Subqueries Derived Relations Views Modification of the Database Joined Relations

Chapter 2: Entity-Relationship Model Basic Concepts Constraints Keys Design Issues E-R Diagram Weak Entity Sets Extended E-R Features Design of an E-R Database Schema Reduction of an E-R Schema to Tables

8.1差错控制编码的基本概念 8.1.1差错控制方式 图8-1差错控制系统

7.1进制数字调制 7.1.1二进制幅度键控(2ASK)

5.1脉冲编码调制(PCM) 5.1.1脉冲编码调制的基本原理

3.1双边带调幅 3.1.1常规调幅(AM)

1.1通信和通信系统的一般概念 图1-1有线载波电话系统示意图