上海交通大学：《数据库系统原理 The principle of Database System》教学资源_第三章习题与答案（第三版）

⚫Backgrounds and Introduction ⚫Highlights and Contribution ⚫Proposal Selection for Tracking ⚫Experiment and Result ⚫Conclusion and Summary

Keys and foreign keys Constraints on attributes and tuples Modification of constraints Assertions triggers

Relational operations (chapter 2) Extended operators Datalog: a logic for relations Relational algebra and Datalog

Functional Dependencies Decompositions Normal Forms (BCNF, 3NF) Multivalued Dependencies (and 4NF) Reasoning About FD’s + MVD’s

实际问题 π―圆周率, 我们十分熟悉的常数

 Processes  Threads  Inter-process communication  Classical IPC problems  Scheduling

光源-光纤的耦合 光纤-光纤的耦合 光纤的连接和光纤连接器

半导体物理简介 发光二极管 (LED) 半导体激光器 (LD)

光纤的损耗 色散及其引起的信号失真 单模光纤的色散优化