query optimization 中文意思是什麼

query optimization 解釋
查詢優化
  • 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）...
  • optimization : n. 最佳化，最優化。
  1. Third, this dissertation analyzes the complicacy of result size estimation problem for xml structure based query optimization compared to its counterpart in traditionally relational database, and proposes a full - featured result size estimation algorithm for xml query, sxm. for simple path expression query, this dissertation proposes a dynamic synopsis model for xml data based on the concept of f - stable and b - stable, xmap. for complicated path expression query, this dissertation adopts an improved bifocal sampling method for result size estimation

    第三，分析了xml結構化查詢優化中的查詢代價估計問題與傳統關系型數據庫中的查詢代價估計問題的區別，提出了一套完整的xml結構化查詢代價估計體系sxm ，包括對簡單路徑表達進行查詢代價估計的動態xml數據統計模型xmap ，對復雜路徑表達進行查詢代價估計的雙焦點例舉法，以及對值匹配條件進行查詢代價估計的基於小波的多維直方圖方法，並能將多種查詢表達的查詢代價估計結果結合在一起，以給出一個完整的xpath查詢的代價估計。
  2. Xml data is an acknowledged typical semi - structured data with grammar and without semantic information. however sematic information is very important to preserve data integrity, data storage and query optimization

    Xml文檔是一種公認的有語法而無語義信息的半結構化數據，但語義對保護數據的完整性、數據存儲和查詢優化都有著十分重要的作用。
  3. So most research of distributed query optimization aim at reducing communication cost

    所以大多數研究分散式查詢優化以減少通訊開銷為目標。
  4. In distributed query optimization, this paper aims at how to reduce communication cost, adopting semi - join program

    對于用傳統的sdd - 1演算法來尋找全歸約程序進行改進。
  5. 20 o gorman k, agrawal d, abbadi a e. multiple query optimization by cache - aware middleware using query teamwork. in proc

    在對tpc - h查詢吞吐量的測試中， minitasking能夠把系統的最終性能提高20 % 。
  6. 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。
  7. 6 we present the query optimization method. for the clustered time series database, the query sequence is classified to one of the cluster, and the efficiency of querying is improved for the similarity search space is limited in the cluster, . 7 we implement a client / server query system and test the presented methods

    根據序列數據庫的聚類結果，將序列數據庫劃分為若干層次的簇結構，通過對查詢序列進行k最鄰近分類，確定查詢序列所屬的簇，然後在相應的簇中執行相似性查詢，實驗結果表』明，基於簇的查詢顯著提高了查詢效率。
  8. This idea is not just exciting but practically attainable. this paper first provides an overview of our optimization strategy, andthen focuses on the key implementation issues of our rule - basedtransformation system for xml query optimization in a databaseenvironment

    Xml的樹形結構數據模型與關系模型相比本質上具有更高的復雜性，這使得xml的查詢優化空間比關系模型要大許多，從而給xml的查詢優化帶來了困難。
  9. 14 che d. implementation issues of a deterministic transformationsystem for structured document query optimization. in proc

    相反，我們直接通過等價變換的方法得到優化后的xml查詢表達式並執行之。
  10. Therefore, more challenges have arisen for query optimization in database grid than traditional distributed database. following this observation, the design of a query optimizer in dartgrid ii is presented, and a heuristic, dynamic and parallel query optimization approach to processing query in database grid is proposed. a set of semantic tools supporting relational database integration and semantic - based information browsing has also been implemented to realize the above vision

    克服數據庫網格特性所帶來的困難需要為數據庫網格提供全局一致的數據表達模式各結點數據模式到全局模式之間的映射方法各結點之間負載平衡和結點動態加入和退出系統的控制策略數據庫網格查詢優化器結構設計以及一整套適合數據庫網格的查詢優化演算法。
  11. Query processing is one of the key techniques in information integration. the dissertation introduces query decomposing, query optimization, query scheduler, sub - query combination

    在查詢處理的基本體系結構基礎之上，本文重點介紹了查詢分解、查詢優化、查詢調度以及子查詢合併。
  12. 2. the design of database query optimization

    2 .在數據庫的查詢優化設計方面。
  13. Genetic algorithm for web information query optimization

    信息查詢優化的遺傳演算法
  14. Accomplishing deterministic xml query optimization

    完成可確定性xml查詢優化
  15. Under the background of alot material under distributed computing environment, this paper emphasizes to study three key problems : the integration of relational database, the design of database query optimization and alot material

    本文以分佈環境下物資分配過程為現實背景，著重研究了其中的三個主要問題:關系數據庫的集成、數據庫的查詢優化設計和物資分配問題。
  16. The characteristics of distributed database are introduced in this paper, common used query optimization algorithms are provided are provided, and the method of selection algorithm is given

    介紹了分散式數據庫的特點，詳細闡述了常用的查詢優化演算法的思想，分析了優缺點，給出了演算法選擇的方法。
  17. By using query optimization, database index, middle base and automatic data update technique, the dw project is very successful. the academic design, the method of implement and the future of insurance industry data warehousing are introduced

    通過運用查詢優化技術、數據倉庫索引技術、帶中間庫的三層結構和數據倉庫數據自動更新方案成功地建立了大連人壽保險業務數據倉庫系統。
  18. This paper uses query processing as a main line, discusses and researches query rewriting, query optimization technology

    論文以查詢處理為主線，對查詢重寫、查詢優化技術進行了討論和研究。
  19. Since 1999, she has worked in many areas of federated query compilation, including query semantics, query rewrite, pushdown analysis and query optimization

    從1999開始，她從事過聯邦查詢編譯的很多領域，包括查詢語義、查詢重寫、下推分析和查詢優化。
  20. 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。
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