Required system data flow model gives a functional view of the required system 所需系统数据流程模型以功能的观点来探讨所需系统。
Current physical data flow model describes the functional aspect of the current environment 现时实体数据流程模型描述现时环境的功能。
After the current physical data flow model is confirmed with users , logicalize it to produce the logical data flow model 与用户确认现时实体数据流程模型后,将之逻辑化,以编制逻辑数据流程模型。
These options may be supported by technical documentation such as work practice model , logical data model and data flow model 这些选择可能需要某些技术性文件的支援,如工作实务模型、逻辑数据模型及数据流程模型。
This paper mainly introduces feature of usb , bus system structure , data transmission method , data flow model of usb and usb protocol 本文详细介绍了usb的特点、总线体系结构、数据传输模式、 usb数据流模型、 usb协议。
Two such viewpoints are represented by data flow modelling ( process point of view ) and logical data modelling ( data point of view ) 其中两个审查观点是透过数据流程模型(工序的观点)及逻辑数据模型(数据的观点)来表示。
This paper mainly introduces the usb work principle , the communication protocol of usb , bus system structure , data transmission method , data flow model of usb 本文着重分析了usb总线的工作原理、通讯协议、总线体系结构、数据传输模式、 usb数据流模型。
However , these two views are static . data flow modelling does not show the sequence of processing while logical data modelling does not indicate how the data changes with time 可是,这两个观点是静态的;数据流程模型没有说明工序发生的先后,而逻辑数据模型则没有说明数据如何随著时间而改变。
This paper put forward the architecture of dataflow manage frame , and analyzed the every tache of the architecture , and make the data flow model . we descripe the data flow with standard model 本文提出了数据流管理框架的整体架构,并对架构中的各个环节进行详细地剖析,将数据流动过程模型化,用规范的模型来描述数据流动过程。