ORM 的全称是 Obejct Relational Mapping ，翻译过来就是 对象关系映射 ，再说得直白一点，就是用 面向对象 里的对象来 映射 数据库中的数据。我们在关系型数据库中，一行数据就可以看成是一个对象，整个表就可以看成是这个对象的列表。这就是非常简单地针对 ORM 的理解。
Well-posednessIn this paper we consider a coupled fixed point problem where the mapping is supposed to satisfy an inequality involving a special type of function which is familiarly known as (mathbf{C }) class function and contains rational terms. We first prove the existence of a coupled ...
Structure having operations of commutative, associative distributive addition and multiplication with additive and multiplicative identities and inverses of nonzero elements, as the real or rational numbers. Function Binary relation from a set A of a set B that to every a in A associates a unique ...
The parentheses indicate that age is input into the function; they do not indicate multiplication. We can also give an algebraic expression as the input to a function. For example f(a+b)f(a+b) means “first add a and b, and the result is the input for the function f.” ...
By using a Haskell implementation of relation-algebraic primitives, we can implement the programs described in Section 3 with a single higher-order function that is parameterized over the rectangle computation. In Subsection 4.1 we present such an implementation and discuss the running time complexity ...
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, to construct the training dataset named MeSH2Matrix for biomedical relation classification using our method. Our dataset provides a matrix of the association between the subject MeSH qualifiers and the object MeSH qualifiers, a relation type, and a superclass for every relation. Then, we will ...
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, to construct the training dataset named MeSH2Matrix for biomedical relation classification using our method. Our dataset provides a matrix of the association between the subject MeSH qualifiers and the object MeSH qualifiers, a relation type, and a superclass for every relation. Then, we will ...