理学 数据库系统设计 释 functional dependency 函数依赖 数据库中一个关系中两组属性之间的约束。
数据库 数据库理论 释文 functional dependence, FD 函数依赖
- spacecraft assembly and integration
- spacecraft astronomy
- spacecraft attitude control
- spacecraft attitude control actuator
- spacecraft attitude control fly wheel
- spacecraft attitude control system
- spacecraft attitude determination
- spacecraft attitude maneuvering
- spacecraft autonomous control
- spacecraft autonomous navigation system
- spacecraft communication, telemetering, command and tracking system
- spacecraft control system
- spacecraft design
- spacecraft entry technique
- spacecraft formation flight control
- spacecraft launch
- spacecraft launching site
- spacecraft magnetic test
- spacecraft manufacturing
- spacecraft material
- spacecraft navigation
- spacecraft nutation
- spacecraft operation
- spacecraft orbit control
- spacecraft project development phases