database query systems 中文意思是什麼

database query systems 解釋
數據庫查詢系統
  • query : n 1 質問；詢問；疑問，懷疑。2 敢問，請問〈在疑問句前單獨使用〉。3 【印刷】（打在原稿或校樣上的）...
  • systems : 國體
  1. The system stores spatial data and characteristic data into central database, and provides services to users in server / client mode. as the research emphases of this thesis, several key sub - systems are designed and realized. the digital map input and maintenance subsystem performs format conversion, editing and updating of spatial data ; the rail - track video playing subsystem uses video recording as reference data, then plays, inquires and traces the corresponding frames in synchronous to the scaled mileage, realizing the query of the active picture frames ; the digital map query subsystem fulfills the map query, preview and spelling of digital map orthograph

    其中，地形圖輸入與維護實現了數字地圖的格式轉換、編輯處理以及空間數據的更新操作，解決了不同格式空間數據的互相轉換問題；線路錄象播放將線路錄像數據作為系統的一種索引數據，活動影像的畫面與里程相對應，實現了基於線路錄像的播放、查詢和檢索的功能，實現了基於活動畫面的查詢檢索功能；數字地圖子系統完成了圖形查詢、數字地圖與線路正射圖像瀏覽、圖幅拼接等功能。
  2. 15 wang j c, horng j t, hsu y m. a genetic algorithm for set query optimization in distributed database systems

    然後提出了一種面向語義數據庫網格的，具有動態并行和啟發式特點的查詢優化演算法。
  3. Sometimes the huge relevant information in those databases should be managed unitedly, so, it is getting more and more critical to develop applications for building systems that combine relevant data from database sources and present them in a form which is comprehensible for users beginning with the basic theory of module and distributed multidatabase, this paper discusses the technologies about the ejb, corba component used in the oracle8i / 9i database, the schema integration and query decomposition, schema integration and query decomposition are key segment of this thesis

    某些情況下，這些數據庫中的相關信息需要統一的進行管理，這就迫切需要開發出相應的應用系統來集成多數據庫中的相關數據並使用戶能夠充分的理解。本文首先從組件和分散式多數據庫的基本原理出發，詳細討論了模式集成和查詢分解技術與ejb 、 corba等組件技術在oracle8i 9i數據庫中的應用。數據模式集成和查詢分解是本文探討的重點，也是分散式多數據庫的核心內容。
  4. Traditional client - server database systems based on " query - shipping " architecture rely totally on processing at server sides, so ca n ' t perform well in a mobile wireless network which characterizes itself as low bandwidth, high expense and poor reliability

    傳統客戶?服務器數據庫的查詢?傳送結構，完全依賴服務方的處理，因此不適用於帶寬低、費用高、可靠性差的無線移動網路環境。
  5. They are kernel knowledge of distributed multidatabase too0 then, based on a reasonable classified frame of schema collision, the paper probes into the strategies realizing schema integration and query decomposition using the good " low coupling, high cohesion " characteristics of component ; and then, a improved model of federal database architecture is designed exerting the virtue of independence and assembly of component <, at last, i had completed the work of developing a demo for the integration of audit information systems with the helps of others, which proved that the improved model of federal database architecture is practicalo

    我在提出一個合理的模式沖突分類框架的基礎上，探討了如何運用組件技術的低耦合、高內聚的良好特性來實現數據模式集成和查詢分解的策略；同時，運用組件技術的獨立性和可裝配的優點，設計了一個改進的聯邦數據庫體系結構模型。最後，在上述理論的指導下，本人與協作者完成了湖南省審計廳信息集成原型系統的設計和開發，總體上證實了改進后聯邦數據庫體系結構模型的可行性。
  6. We mainly study the query optimization technique of relational database systems. based on the requirement of the cbase, we put forward a suit of rewriter rules that are used in query optimization module

    本文主要研究了關系數據庫中的查詢優化技術，並且根據cbase數據庫系統的需求，提出了一套完整的查詢重寫規則用於查詢優化模塊。
  7. Among these techniques, log system is the foundation of fault - tolerance in distributed database systems. many sub - systems can benefit from powerful log system, such as distributed query, parallel processing control, transaction recovery, and message - based fault - tolerable log techniques. in addition, log can be used to maintain consistency among database ' s duplicates

    其中，日誌是錯誤容忍與分散式數據庫系統的基礎，分散式數據庫系統可靠性通過一套基於日誌的機制得到保證，如用於分散式更新、並發控制、事務恢復、錯誤容忍的消息日誌技術；當網路中斷或隔離，日誌可用於維護數據副本的一致性。
  8. This course is designed to introduce graduate students to the foundations of database systems, focusing on basics such as the relational algebra and data model, query optimization, query processing, and transactions

    課程描述本課程設計的目的是給研究生介紹數據庫的基礎知識，關注于基礎，如關系代數和數據模型，查詢優化、查詢處理和事務。
  9. This system has many complex and multiplex data source in order to solve data sharing problem between electric power metering mis and other systems, a lot of data sharing methods are analyzed which includes data transformation service s database replication. distributed transaction coordinator distributed query and pipeline. after deeply analyzing these methods

    由於電能計量管理系統涉及的數據來源復雜、類型繁多，為解決電能計量管理系統與其他業務系統和自動化設備的數據共享問題，本文分析了數據傳輸服務（ dts ） 、數據庫復制、分佈事務協調器（ dtc ） 、分散式查詢和數據管道等數據共享的方法，通過對幾種數據傳輸和共享方法的深入分析，提出了針對不同類型數據源的數據共享策略，並在實際系統中進行了實現。
  10. The 19th acm sigmod - sigact - sigart symp. principles of database systems, dallas, texas, 2000, pp. 175 - 186. 3 jensen c s, lin d, ooi b c. query and update efficient b - tree based indexing of moving objects

    然而不幸的是當前處理網路受限的移動對象的索引工作大多考慮移動對象的歷史軌跡，即如何減少歷史位置的存儲代價和查詢代價，而不考慮對移動對象將來的位置的查詢支持。
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