logical view of data 中文意思是什麼
logical view of data
解釋
數據邏輯視圖-
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據流程模型（工序的觀點）及邏輯數據模型（數據的觀點）來表示。 -
But by analyzing the data warehouse architecture, it can be found that the load imbalance of computational logical result in overload for the integrator, not enough positivity for information sources, and high price for view maintenance
但是分析他們的體系結構發現，計算邏輯負載的不平衡造成集成器負擔過重，信息源的主動性不強，系統的維護開銷大等缺點。 -
The next logical step is to artificially format that data into a number of pages, so that your users can view a manageable chunk at a time
比較符合邏輯的措施是人工地將數據格式化到多個頁面上，使用戶可以每次查看一部分可以管理的數據。 -
This paper stresses on discussing the architecture, access protocol and implementation mechanism based on xml and web services technologies, researches key technologies of metadata information service and data uniform access and management in database grid, designs and implements distributed mis subsystem and das subsystem, which support multi - domain management. mis can provides metadata information for the whole system, such as das and clients, it uses domain name 、 logical name and internal name of data object to uniformly name database resources in grid and implements name mapping mechanism and user view metadata information service and provides virtual organization and management of database resources. das can provide a scalable uniform data access by virtual organization and management of storage resources and multi - mode data share access mechanism, thus integrate database resources in grid and shields distribution and heterogeneity of resources and achieves transparent access. system adopts data access mechanism based on user request mapping to flexibly implement data access across multi domains, and adopts distributed data cache mechanism 、 security mechanism based gsi to provide high - performance secure data service for grid users
本文論述了griddaen - dai系統的邏輯結構、訪問協議、數據服務流程以及基於webservices 、 xml等技術的實現策略，重點研究數據庫網格中的元服務、數據統一訪問和管理等關鍵技術，設計和實現了支持多管理域的分散式元服務子系統和數據訪問服務子系統。其中元服務主要為整個系統提供各種元信息支持，它採用域名、數據對象的邏輯名稱、物理名稱和內部名稱對廣域環境下的數據庫數據進行了統一命名，實現了相應的名字映射機制和全局的用戶數據視圖服務，提供了數據庫資源的虛擬組織與管理方式;數據訪問服務通過提供可擴展的統一數據訪問和支持多種數據共享訪問模式，屏蔽了數據庫資源的分佈性和異構性，為用戶提供了統一透明的數據服務。 -
On the basis of abundant materials, the paper mainly utilized the qualitative methods combining with some quantitative tools, studied the historical documents and statistical data of world economy and trade since 1431, some of which is much precious. then the author got several new conclusions in the historical and cross - section view. the paper is arranged in a logical order as much as possible for better understanding
論文在充分佔有資料的基礎上，以歷史的視角結合橫斷面數據，運用定性為主、定性與定量相結合的研究方法，盡可能地查閱了1431年以來的歷史文獻和統計數據（其中有些數據甚為珍貴） ，從中得出了若干具有新意的結論。
分享友人