Required system data flow model gives a functional view of the required system 所需系統(tǒng)數(shù)據(jù)流程模型以功能的觀點來探討所需系統(tǒng)。
Current physical data flow model describes the functional aspect of the current environment 現(xiàn)時實體數(shù)據(jù)流程模型描述現(xiàn)時環(huán)境的功能。
After the current physical data flow model is confirmed with users , logicalize it to produce the logical data flow model 與用戶確認現(xiàn)時實體數(shù)據(jù)流程模型后,將之邏輯化,以編制邏輯數(shù)據(jù)流程模型。
These options may be supported by technical documentation such as work practice model , logical data model and data flow model 這些選擇可能需要某些技術(shù)性文件的支援,如工作實務(wù)模型、邏輯數(shù)據(jù)模型及數(shù)據(jù)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 本文詳細介紹了usb的特點、總線體系結(jié)構(gòu)、數(shù)據(jù)傳輸模式、 usb數(shù)據(jù)流模型、 usb協(xié)議。
Two such viewpoints are represented by data flow modelling ( process point of view ) and logical data modelling ( data point of view ) 其中兩個審查觀點是透過數(shù)據(jù)流程模型(工序的觀點)及邏輯數(shù)據(jù)模型(數(shù)據(jù)的觀點)來表示。
This paper mainly introduces the usb work principle , the communication protocol of usb , bus system structure , data transmission method , data flow model of usb 本文著重分析了usb總線的工作原理、通訊協(xié)議、總線體系結(jié)構(gòu)、數(shù)據(jù)傳輸模式、 usb數(shù)據(jù)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,這兩個觀點是靜態(tài)的;數(shù)據(jù)流程模型沒有說明工序發(fā)生的先后,而邏輯數(shù)據(jù)模型則沒有說明數(shù)據(jù)如何隨著時間而改變。
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 本文提出了數(shù)據(jù)流管理框架的整體架構(gòu),并對架構(gòu)中的各個環(huán)節(jié)進行詳細地剖析,將數(shù)據(jù)流動過程模型化,用規(guī)范的模型來描述數(shù)據(jù)流動過程。