“relational calculus”的概念、定义、翻译、参考文献-科学参考

单词	relational calculus
释义	relational calculus Encyclopedia 理学数据库系统释 relational calculus关系演算一种抽象的关系数据语言，它通过数理逻辑中的谓词演算表达查询的要求。 Computer 数据库数据库理论释文 relational calculus关系演算
随便看	model-driven decision support system model driven development model driven development, MDD model driven development,MDD model enzyme model error model evolution calculus model experiment model fit model following control system model for airport noise model for analysis of variance model for career decision making model for electroweak theory model for rail traffic noise model for road traffic noise model for sound propagation model for source prediction model free flight test model-free Learning model herbage model identification modeling modeling across scales modeling algorithm

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。