模型中各系数与运行工况有关，可根据当前的汽包压力、锅炉物理结构数据及水蒸汽性质得到。
The parameters of the model can be obtained from the pressure in the drum, the physical dimensions and characteristics of the boiler and the steam and water parameters table.
这个特点与非dbms系统非常不同，在那种系统中，程序员必须知道数据的物理结构。
Compare this with non-DBMS systems in which the programmer must know the physical structure of the data.
这些文档的物理结构—兄弟元素的次序、数据是存储在属性中还是在PCDATA元素中、是否使用实体—往往是不重要的。
Their physical structure — the order of sibling elements, whether data is stored in attributes or PCDATA-only elements, whether entities are used — is often unimportant.
对于每个正在运行的进程，虚拟地址与物理地址之间的映射是在一个称作页表的数据结构中维护的。
For each running process, the mapping between virtual and physical address is maintained in a data structure called the page table.
文件的结构和大小取决于底层文件系统 —即把文件数据存储到物理设备上的子系统。
The structure and size of a file depends on the underlying file system—the subsystem that persists the file data to a physical device.
系统编目描述数据的逻辑和物理结构。
The system catalog describes the logical and physical structure of the data.
不同物理数据结构之间的实现关系。
Realization relationships between the different physical data structures.
SOAPAPI使用XML文档来以类似的方式表示服务数据对象，从而同时与物理和逻辑模型中的内容结构通信。
The SOAP API USES XML documents to similarly represent Service Data Objects to communicate content structures in both the physical and logical model.
如果您不了解您目前处理的数据的物理结构，那么您就有大麻烦了。
If you don't understand the physical structure of the data that you're currently working with then you're in serious trouble.
这也许和物理的数据结构不同，但不重要。
This may not be the same as the physical data structure, but that is unimportant.
值得注意的是，根据术语的不同，物理结构可能不是必需收集的信息，可以以后在开发数据模型时再确定。
It is worth noting that, depending on the term, the physical structure may not be a mandatory aspect to collect and may be defined later or in the specification phase as data models are developed.
这里所使用的术语“业务范围（business-wide）”反映的是数据访问和使用的范围，而非物理结构。
The term "business-wide" is used here to reflect the scope of data access and usage, not the physical structure.
数据中心(物理系统与网络连接)的结构。
Architecture of the data center (physical systems and network connections).
系统接口的物理类及属性结构(等同于数据库结构，在其中直接数据访问是最好或唯一的选择)。
Physical class and attribute structure of system interfaces (which will equate to database structures where direct data access is the best or only option).
它们会确定外部接口或一些物理系统的数据结构，因此描绘出在接口中进行转换的物理数据结构。
They may determine the data structure of external interfaces or some physical systems, and therefore represent physical data structures to be transformed within interfaces.
为了是数据模型更加有效，它必须足够简单以使最终用户能够沟通必需的数据结构，同时它也要足够详细以使数据库设计人员能够创建物理结构。
To be effective, it must be simple enough to communicate the required data structure to the end user, yet detailed enough that the database designer can create the physical structure.
对于32位内存结构，不管物理ram有多大，实例、数据库配置都受到4gb可寻址空间的限制。
With 32-bit memory structure, no matter how big the physical RAM is, the instance, database configurations are limited by the 4gb addressable space.
让数据架构师参与这个过程常常非常有帮助，因为他们通常了解数据源的物理约束和结构特性。
It is also often very helpful to have a data architect available and involved in this process as they typically understand the physical constraints and structural aspects of the data sources.
在实践中，大多数用户不需要关心DB 2对XML数据采用的新的物理存储管理体系结构。
As a practical matter, most users won't need to concern themselves with DB2's new physical storage management architecture for XML data.
如果文件系统数据结构正好与底层物理分区大小一致，对4096字节数据结构的读写会产生对单一扇区的读写。
If the file system data structures happen to align perfectly with the underlying physical partition size, a read or write of a 4096-byte data structure results in a read or write of a single sector.
用于创建物理数据模型的图形化工具，DB 2基于SQL的数据仓库结构数据流，以及olap多维数据集模型。
Graphical tool for creating physical data models, DB2 SQL-based warehouse construction data flows, and OLAP cube models.
在Cubing模型中，大多数OLAP对象是从InfoSphereDataArchitect中的多维物理数据模型生成的，比如多维数据集模型、事实、维度、度量、分层结构和级别。
In the Cubing model, most OLAP objects are generated from the dimensional physical data model in InfoSphere data Architect, such as cube models, facts, dimensions, measures, hierarchies, and levels.
给出了用于按照空间关系进行模糊查询的计算机物理实现的数据结构。
Data structure for computational physical implementation used for fuzzy query according to spatial relations is given.
用逻辑结构或物理结构来描述数据是有很大不同。
It is different to describe the data in logical or physical.
在网状的超媒体数据系统设计中，逻辑上用层次数据结构表达，而系统的物理实现采用了更为简单的线性结构组织超媒体数据。
We adopt linear structure organization for data converting in the netted super media The supper media net data is explained in gradational construction logically and in linear construction physically.
原子光谱数据是研究原子结构的重要参数，氢及类氢离子是原子物理和量子力学研究的理想体系。
Atomic spectrum data are important parameters to research atomic structure, hydrogen and hydrogen-like ions are idea system to study atomic physics and quantum mechanics.
它包括物体的GORC物理数据结构，详细的形状描述和抽象描述。
Itconsists of a GORC physical data structure, detailed shape description and abstract description.
索引是包含指向数据的指针的物理结构。
An index is a physical structure containing Pointers to the data.
在概括性地介绍智能卡的物理结构之后，重点介绍了AT 89sc168芯片的使用，智能卡的文件数据结构和卡内操作系统结构。
After synoptically introduced the physical structure of Smart Card, the using of the chip AT89SC168 and structure on file and data of Smart Card is especially introduced.
在概括性地介绍智能卡的物理结构之后，重点介绍了AT 89sc168芯片的使用，智能卡的文件数据结构和卡内操作系统结构。
After synoptically introduced the physical structure of Smart Card, the using of the chip AT89SC168 and structure on file and data of Smart Card is especially introduced.
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