XQuery被非正式地设计为可以构造XML文档，而这些XML文档是通过对输入的XML文档进行一阶谓词演算得出的。
Informally, XQuery is designed to be able to construct any XML document that can be computed from input XML documents using the power of the first-order predicate calculus.
给出了中介关系数据模型，在此基础上构造了两类不同的中介关系数据库查询语言：中介关系演算和中介关系代数。
Based on this model, this paper constructs two different kinds of medium relational database query languages: medium relational calculus and medium relational algebra.
以三维时间推移地震为例，在连续型及逐次递归算法的基础上构造了快速的局域化反演算法。
As a concrete example for the 3-d time-lapse seismic problem, a localized inversion algorithm is designed based on the continuous and recursive methods.
以三维时间推移地震为例，在连续型及逐次递归算法的基础上构造了快速的局域化反演算法。
As a concrete example for the 3-d time-lapse seismic problem, a localized inversion algorithm is designed based on the continuous and recursive methods.
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