The DAS model covers the direct attachment of storage to the platform and represents the vast majority of storage use.
DAS模型包含到平台的直接存储附件，代表了绝大多数的存储使用。
Having defined the model, we can now create an instance of the Relational DAS.
定义了模式之后，我们现在可以创建一个关系型DAS的实例。
You will have seen that to use XML with SDO, you do need a XML schema file from which the XML DAS can initialize the model of types and properties, and perhaps you found that off-putting.
您已看到，为将xml与sdo配合使用，确实需要一个XML模式文件，XMLDAS将通过此文件初始化类型与属性模型，或许您还会发现这有些令人不快。
The XML DAS always initializes its model by reading and parsing an XML schema definition file (an XSD file) that corresponds to the XML instance document it is going to load.
XMLDAS初始化其模型的方法是：读取和解析与准备载入的 XML文档对应的 XML模式定义文件（XSD 文件）。
There is no need to specify a SQL statement for updates because the Relational DAS derives this from the model and the contact data object's change summary.
不需要为更新指定sql语句，原因是关系型DAS可以从模式和联系人数据对象的更改概要中派生它。
The Relational DAS will take this schema and use it to define the model for the Service Data Objects it can create.
关系型DAS采用此架构并使用它定义可以创建的服务数据对象的模式。
The model needs to match the types, properties, and relationships that exist in the source XML or relational database, and this information needs to be specified to the DAS.
模型需要匹配源XML或关系数据库中存在的类型、属性和关系，需要将此信息指定给DAS。
To work with an XML document and the XML DAS, you need to start with an XML schema file, which the DAS USES to build the SDO model.
为处理XML文档和XMLDAS，首先需要一个XML模式文件，DAS将用此文件来构建sdo模型。
You will recall that the XML DAS gets its information about the model the SDOs must follow by reading an XML schema file.
回忆一下，XMLDAS通过读取XML模式文件获取SDO必须遵循的模型。
Due to the complexity of the composite fading channel, a new simplified channel model is proposed to analyze the bit error ratio(BER)performance of the distributed antenna system(DAS).
针对复合衰落信道的复杂性，提出了一种简化的信道模型来研究分布式天线系统的误比特率性能。
Causes of deviation of the main steam flow value indicated in DAS system for Beilun power plant unit 2 are analysed. The problems are found in the original calculation model.
对北仑电厂2号机组DAS系统主蒸汽流量指示值出现偏差的原因进行分析，找出原计算模块中存在的问题。
Causes of deviation of the main steam flow value indicated in DAS system for Beilun power plant unit 2 are analysed. The problems are found in the original calculation model.
对北仑电厂2号机组DAS系统主蒸汽流量指示值出现偏差的原因进行分析，找出原计算模块中存在的问题。
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