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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

資料交換與查詢在XML文件與關連資料庫之間 / Data Exchange and Query Language between XML Documents and Relational Databases

王瑞娟 Unknown Date (has links)
隨著全球資訊網(World Wild Web,簡稱WWW或Web)的日趨普及,我們發現愈來愈多的資料是直接從網路上呈現與存取的。不同於過去關聯式資料庫(Relational Database Management Systems,RDBMS)的結構式資料(Structured Data)。現今許多資料都是直接以HTML(Hypertext Markup Language)格式呈現,然而HTML 的標籤只是在做資料的呈現。為了讓網際網路上的資料可真正順利傳達於組織間,新興的XML逐漸受到重視。相較於HTML,XML標籤是在做資料的定義,讓定義好的資料直接透過網際網路傳達於組織間,具有在組織間再使用(Reuse)的能力,因此現在逐漸成為組織間資料整合與轉換時一個好的解決方式。但面對傳統的關連式資料庫又該如何與XML文件整合(Data Integration)的動作,讓兩種不同來源的資料能夠相互運算(Interoperability),達成異質性資料的同質化(Homogeneous)的功效。使不同來源的資料可雙向的互相溝通,是目前急欲被探討的問題。因此本研究便發展了對關聯式資料庫與XML文件兩種來源相互轉換的溝通機制,讓資料能在這兩種來源間相互交換與利用。 / With the popularity of WWW( World Wild Web or Web ),we have seen large volume of data is available on the Web. Different from the data stored in traditional RDBMS (Relational Databases Managements Systems) which is structured data, huge data now is stored directly in the form of HTML (Hypertext Markup Language) pages. For representing data and interchange data between multiple data sources on the Web, XML (Extensible Markup Language) is a fast emerging as the dominant standard. Like HTML, XML is a subset of SGML. However, whereas HTML tags serve the primary purpose of describing how to display a data item, XML tags describe the data itself. The initial impetus for XML may have been primarily to enhance this ability of remote applications to interpret and operate on documents fetched over the Internet, so it has become the best solution now to solve the problems with data exchange and translation between the multiple sources. But XML also raises a problem: how to integrate XML documents with data stored in the traditional RDBMS. The objective is to communicate bi-directional data sources between RDBMS data and XML documents, and has the ability to interoperate data between multiple data sources. Finally, reach the purpose of heterogeneous data become homogeneous. In this research, we try to develop a translation model between RDBMS data and XML documents, in order to exchange and reuse data between different sources.
2

網際網路資料庫系統績效評估方法之研究--以電子商務為例 / Web database systems benchmark method - electronic commerce orientation

程文成, Cheng, Wen-Cheng Unknown Date (has links)
網路開放商業化以來,各式各樣的商機在網際網路上浮現,大小商家紛在網路上設立據點,或從事廣告、宣傳公司形象,或展示產品內容與產品功能,有的更進一步的設計能與消費者在網路上直接交易,我們概括性的稱之為電子商務。在電子商務的背後,各網站必須要有資料庫作支撐,才能有好的效率和服務。本研究以網際網路資料庫為探討主體,績效為探討目的。並主要以績效評估(Benchmark)理論為貫穿整個研究的基礎理論,一步步地建立適合網際網路資料庫及運算作績效評估的模型。並於模型完成後,予以程式化實作,並以所得數據作測試。 / A lot of business opportunity springs after commercial activities are officially allowed on Internet. The power and the potential of this market is represented by lots of web sites being set up. "Electronic Commerce" is coming to the whole world. However, it is the database supporting business web sites running that counts. Based upon the theory of benchmarking, we want to find out ways that we can know the performance of web database. After the model is set up and the workload is ready, an implementation is being made.
3

自由語文資訊檢索資料庫系統績效評估工作量模式之研究-以傳播學網際網路資料庫為例 / Free-Text Information Retrieval Database System Benchmark Workload Model-Web Communication Databases

林佳慧, Lin, Chia-Hui Unknown Date (has links)
資訊檢索(Information Retrieval)一直是資訊學界的重要研究領域,但長久以來並未能在其它的學門中發揮其重要性,然而藉由Internet的普及與網路資源的激增,以資訊檢索為基礎的網路搜尋技術,已逐漸成為Internet上相當受到重視的技術之一。雖然全文資訊檢索的技術已存在多時,然而電腦產業一直缺乏一廣泛標準的績效評估,來評估全文資訊檢索系統的產出及價格/效能比,1990年代對全文資訊檢索軟體的大量需求,極需要一個標準、一致的方法,來比較各系統間效能的差異。本研究即針對傳播中文全文資訊檢索資料庫系統為探討的主題,試圖以關連式資料庫績效評估的理論及方法,來建構其工作量模式以進行績效評估。 / Information Retrieval has been a important research domain in Information academic. But it does not play in the other domain for a long time. However the Internet search technology based on Information Retrieval has been an one of the important technologies in the Internet by the spreading of Internet and the growth of network resources. Although the Full-Text Information Retrieval or Free-Text Information Retrieval technology has existed for a long time, the computer industry was lack of a wide, standard benchmark to evaluate the throughput and price/performance of the Full-Text Information Retrieval System. The large demand for Full-Text Information Retrieval System or Free-Text Information Retrieval System software needs a standard method to compare the performance of each system in 90s. This research is focused on the Communication Free-Text Information Retrieval Database System in Chinese, and construct it’s workload model to evaluate by using the theory and method of Relational Database Benchmark.

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