Deal with the problem of object and relation mapping is to solving the problem of data persistence.
对象和关系的映射实际上是要解决数据持久性问题。
Object-Relation Mapping(ORM) handles persisting objects to and from the record of underlying relation database, it is an object-oriented method to develop application.
对象-关系映射就是把对象映射到关系数据库中的记录，它是完全从面向对象的角度来设计和开发程序的。
Object-relation mapping(ORM) handles persisting objects to and from the records of underlying relation database, it is an object-oriented method to develop application.
对象-关系映射就是把对象映射到关系数据库中的记录，它是完全从面向对象的角度来设计和开发程序的。
The relation presented in this step of the example illustrates only part of a typical UML to RDB mapping, as it deals only with binary associations.
示例的这一步骤中表达的关联只表明了典型的UML到RDB的映射的一部分，因为它只处理二元关联。
A relation in MTF (also referred to as a mapping rule) defines a type of mapping that will apply to instances of given model classes.
在MTF中的一个关系(也称为一个映射规则)定义了一种可应用于给定模型类的实例的映射类型。
Many-to-many relations require a special mapping and are handled individually in another relation.
多对多关联需要一个特殊映射，它在另一个关联中被单独处理。
Then you'll be introduced to the basic concepts used throughout this article (mapping, relation, and the syntax of the mapping language).
然后你将了解贯穿这篇文章的基本概念（映射关联以及映射语言的语法）。
The mapping is quite similar to the previous relation; you will find a table corresponding to each class with an identical name.
映射与前面的关联很相似；你将找到一个与每一个类同名的相关表。
In mapping terms, PERSON is the owner of the relation (i.e., the foreign key to the ADDRESS table resides in the PERSON table).
在映射的术语中，PERSON是此关系的所有者(即address表的外键存在于person表内)。
This is the first time that this example is using a relation as a declarative statement to define an expression (in other words, a value assignment) instead of using it for model-to-model mapping.
这是本例子第一次把关联作为一个定义表达式(换句话说，一个赋值语句)的声明性陈述来使用，而不是用它作模型到模型的映射。
Table 2 illustrates mapping and "gap analysis" results across process areas for CMMI levels 2 and 3 in relation to RUP.
表2描绘了与RUP相关的 CMMI层次2和层次之间的映射和 “差异分析”。
It illustrates the concept and identification of virtual channel, the mapping relation between virtual channel and traffic class and virtual channel arbitration.
详细阐述了虚拟通道的概念、识别，虚拟通道和流量归类的映射对应关系以及虚拟通道的仲裁。
Finally, the local mapping relation of nodes is matched according to the coordinates of the reference node so as to acquire the global mapping of node's coordinates.
最后，根据参考节点的坐标对节点局部映射关系进行匹配，以获取节点坐标的全局映射。
It is based on the mapping relation of function modules and structure modules that we establish the morphologic matrix on feed system of naval gun.
再根据功能模块与结构模块的映射关系，建立了舰炮供弹系统的形态学矩阵给出舰炮供弹系统的模块化方案。
The mapping can be combined for a direct DTD to relation database schema.
映射过程也可合并为直接有DTD到关系数据库的映射。
But, It won't be good icon if the mapping relation can't be relax and correct knowed by users.
但是，如果这种映射关系不能被用户轻松并且准确地理解，那么这种图标就不应是好的图标。
The Mapping process each element in DTD and mapping to an object schema. Then the object schema is mapped to the relation database schema.
映射的策略是以分析处理DTD中的每一个元素映射为对象模型，再由对象模型映射为数据库的关系模型。
Finally, bitemporal relation is defined as the set of the temporal mapping tuple, and the bitemporal relational algebra operations are described formally.
最后，用时态映射定义的元组对双时态关系进行定义，并由此给出双时态关系代数运算的形式化描述。
With the implicit function relation, BP (Back Propagation) neural network can easily realize the mapping between input data and output data.
通过找出其隐式函数关系，误差反向传播神经网络可以实现输入和输出间的任意映射。
The mapping relation of product configuration process for different customer requisite types is analyzed and the uniform model expression is established.
对客户需求类型进行了分类，分析了各种类型下的产品配置过程的映射关系，并建立了统一的配置模型表达。
Beginning on the GDI mapping mode, the paper discusses the concepts, meaning and relation of view port based on logic coordinates and window based on device coordinates.
本文从GDI映射方式入手，对基于设备坐标的视口和基于逻辑坐标的窗口的概念、内涵及其相互关系进行了分析介绍。
This mapping relation is determined by training neural network with a back-propagation algorithm, which is utilized to estimate images at finer resolution from coarser versions.
使用反向传播算法训练神经网络，确定这种映射关系；根据该映射关系由低分辨力图像估计高分辨力图像。
Such non-linear relation can not be worked out by formula, While BP network can simulate such non-linear relation for its random non-linear mapping ability.
利用神经网络的学习能力，BP网的任意非线性映射能力可以模拟这复杂的函数关系。
By reflection matrix the mapping relation of element function pair and spectral vector pair can be established.
元函数对与谱向量对通过反射阵建立映射关系。
This article introduces the work stream in designing of object relation database, and mainly discusses the ways of mapping from the class model to the relational model.
介绍对象关系数据库设计的工作流程，讨论如何将类模型映射到关系模型。
This paper discuses the mapping algorithm between XML document and relation database, the mapping algorithm between XML document and object-oriented database and isomeric database over XML.
论述了XML文档与关系数据库间的映射规则算法、XML文档与面向数据库间的映射规则算法及基于XML异构数据库间的映射规则。
The composite operation of fuzzy relation and operator constitute the fuzzy mapping.
模糊关系与算子合成构成了模糊映射，即将模糊集映射为模糊集。
It get the nonlinear mapping to describe the relation of the system's input and output by learning the controlled system's input and output data.
它依据被控系统的输入输出数据，通过学习得到一个描述系统输入输出关系的非线性映射。
The feature of the icons is a implied relation built on worlds of computer and fact. , or a mapping relations.
图标的功用在于建立起计算机世界与真实世界的一种隐喻，或者映射关系。
The feature of the icons is a implied relation built on worlds of computer and fact. , or a mapping relations.
图标的功用在于建立起计算机世界与真实世界的一种隐喻，或者映射关系。
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