理学 数据库系统设计 释 entity-relationship model 实体关系模型 通过客观事物及其联系进行形式化描述的数据模型。又称实体-联系模型、E-R模型。
数据库 数据库理论 释文 entity-relationship model 实体-联系模型
- Hille-Yosida theorem
- Hill method of solution
- hill myna
- Hill of No Return
- Hill operator
- Hill problem
- Hill reaction
- hills
- Hill's approximation
- Hillsborough
- Hill's criteria for causality
- hill shading
- hill-side ditch
- Hill sphere
- Hill stability
- hill-start assist control，HAC
- hillstream loaches
- Hill theory
- Hill theoryof the Moon
- hilltop inflation
- Hill variational orbit
- hilly landscape
- hilly regions of China
- Hiltner-Hall effect
- Hilton