relational transformation 中文意思是什麼

relational transformation 解釋
關系轉換
  • relational : adj. 有關系的；親戚的；（特指語法上）表示關系的。adv. -ly
  • transformation : n 轉變，變化；變形；【生物學】（尤指昆蟲的）轉化，變態，改造，改革；變質；【數學】變換；【電學】...
  1. From paris convention to the madrid agreement and lisbon agreement, then trips. the relational language survived transformation from “ indications of source ” to “ appellations of origin ” and “ geographical indication ”. their content also has changed a great deal

    從巴黎公約到馬德里協定和里斯本協定，再到trips協定，相關術語歷經了「貨源標志」 、 「原產地名稱」和「地理標志」的轉變，其內容也發生了很大的變化。
  2. Aiming at this problem, the main research issues and achievements in this paper are as follows : bi - directional data transformation between rdb and xml with semantic constraints preserved for most of existing researches on static data transformation between xml and rdb, dtd is taken as the schema description language for xml, and the semantic constraints are often lost during the transformation process. to overcome these disadvantages, the author adopts xml - schema, a standard schema description language proposed by w3c to replace dtd, as the description method owing to its more powerful functions than dtd, and of course with the syntax much more complicated. after analyzing the constraints characteristics in both xml - schema and relational schema, a semantic constraints - preserved algorithm is proposed which can realize the bi - directional schema mapping between rdb and xml through a formalized description of xml based on regular tree and a general expression for relational schema based on direct graph approach

    保留語義約束的xml與rdb雙向靜態數據轉換技術現有研究大多採用dtd （ documenttypedefinition ，文檔類型定義）作為xml的模式描述語言，並且在模式映射過程中丟失語義約束信息，本文分析了xml - schema （ xml - schema採用與dtd完全不同的語法，數據描述能力更強同時也更為復雜，已被w3c確定為替代dtd作為xml模式描述語言的標準）及關系模式的語義約束特徵，通過基於正則樹的xml形式化描述方法以及基於有向圖的一般關系模式表示方法的研究，建立保留語義約束的xml - schema與關系模式的雙向模式映射演算法，實現了xml與rdb的雙向數據轉換，較好地解決了xml與rdb在靜態數據轉換層面的數據集成問題，可有效滿足企業大量rdb數據面向xml的發布以及與日俱增的xml數據存入rdb的應用需求。
  3. Second, the dissertation addresses the global query rewriting issues of the service oriented spatial data integration. query rewriting and optimization methods are presented based on equivalent transformation of relational operators. we study the data replication issues of spatial data services and presents strategies to deal with data fragmentation and service selection

    其次，論文研究了面向空間數據服務集成的全局查詢重構問題，在關系代數等價變換基礎上提出了空間數據服務全局查詢重構和優化方法，並提出了面向分散式空間區域查詢的副本處理方法和資源選擇策略。
  4. An approach to formalize and evaluate relational algebra operations by means of xdd is presented. a query is formalized as one or more xml clauses and evaluated by employment of equivalent transformation of xdd

    提出了根據關系代數表達式構造查詢子句的方法，關系代數表達式可以用若干個xml子句描述，並通過等價變換得到查詢結果，證明了該方法的正確性。
  5. An ssis transformation can also pivot relational data and transform it into a less - normalized format that is more compatible with the table structure in the data warehouse

    Ssis轉換還可以透視關系數據，並將其轉換為不太規范的格式，以便更好地與數據倉庫中的表結構相兼容。
  6. This radar database system fits for china ' s radar network using object - oriented programming design method, recording some important parameters of radar data : the longitude, latitude of radar station, radar type, radar wavelength, radar data format, weather kind ( kind of intensity radar echo, schema of velocity radar, echo shape ) embodying in the radar data, etc. it also records the weather course information embodying in a series of relational radar data : the beginning time of weather course, the ending time of weather course, weather type, etc and the disk information, including recording time, recording contents, recording data number and weather type, etc. above all, this system realizes some basic operational processing : adding, deletion, updating, query of records and also some assistant functions : exportation, data transformation, displaying, backing up of data

    該數據庫系統採用面向對象程序設計方法，用visualc + + 6 . 0作為應用程序的前端開發工具，用microsoftaccess2000做數據庫，不僅實現了對雷達基數據信息的一些基本操作：記錄信息添加、刪除、修改、查詢，還實現了處理、分析雷達基數據所需的一些操作：數據導出，數據格式轉換、數據回顯（圖像方式和動畫方式） 、數據壓縮、備份等，另外針對日前雷達臺站存儲雷達數據的現狀，還實現了對存儲光盤的管理。
  7. 3 ) presentation and implementation of key - based relational schema reverse reconstruction algorithm ( krr ). based on discrete mathematics theory, a krr algorithm is proposed which can realize the transformation from relational schema to directed graph structure and get a good data preparation for the sequential schema mapping

    3 ）提出基於key的關系模式重構演算法以離散數學理論為基礎，對關系模式數學建模，通過提出基於key的關系模式重構演算法，將關系模式轉化為有向圖數據結構，為模式映射提供基礎。
  8. Firstly we introduced research background and theory foundation. data characteristics of half structure and xml and cscw are simply introduced ; very important critical technology of cooperation work : transform between xml and the relational database is researched deeply secondly. the emphatic questions such as principle and thought are expatiated, and a general transformation rule and realization such as the data abstract, integration and transform are put forward ; as well as we introduced data binding in java environment, and put forward a datachange model which works in cooperation work

    本文首先介紹研究的背景和理論基礎，對xml 、 cscw技術和web的半結構化數據特點做了簡單介紹；接著對數據庫協同工作中的關鍵技術： xml與關系數據庫之間的相互轉換進行了深入的研究，闡述了轉換過程中的原理、思想精髓等重點問題，提出了通用的轉換規則，以及在web數據庫中數據的提取、集成、轉換等實現技術；同時還介紹了在java環境下數據綁定的過程，並提出一個協同數據庫管理系統的模型datachange 。
  9. Successful data transformation from relational schema to xml schema and data integration makes the middleware work as a bottom level service to support data publishing, sharing and access

    通過實現關系數據到xml數據的轉化、集成，該中間件為數據共享、發布和應用對集成信息的訪問提供了底層支持。
  10. The system highly incorporates data source selection module, data pretreatment module, data exploration module, data mining module and knowledge representation module, and makes data pretreatment by taking the advantage of some tools of relational database like query, and data transformation

    系統將數據挖掘過程分成數據源選擇、數據預處理、數據分析、挖掘演算法、模式表達幾個部分。在進行數據挖掘的過程中用戶可以分別與之交互，體現了系統的靈活性以及提高了數據挖掘的質量。
  11. When user defined functions ( udfs ) are involved in the join predicate, the algorithms for the computation of relational joins can not be used directly. in the paper, the restricting transformation function r, is defined, which can restrict some variable ' s values. without scanning the entire relation, performance of join algorithm can be improved greatly

    當連接條件中包含用戶自定義的復雜函數時，原有的連接演算法不能直接應用於該連接運算，為此，本文提出了限定變換函數t _ r概念，來限定連接謂詞中某些變元的取值范圍，從而避免對整個關系的掃描，達到提高連接演算法性能的目的。
  12. Fastsoa uses native xml persistence to avoid xml - to - relational transformation performance problems

    Fastsoa使用本機xml持久性來避免xml到關系數據庫的轉換造成的性能問題。
分享友人
分享到 Line

分享到臉書