• NGHIÊN CỨU MẠNG NGN CỦA VNPT VÀ CÁC DỊCH VỤ TRÊN NGN

    NGHIÊN CỨU MẠNG NGN CỦA VNPT VÀ CÁC DỊCH VỤ TRÊN NGN

    Mạng viễn thông là phương tiện truyền đưa thông tin từ đầu phát tới đầu thu. Mạng có nhiệm vụ cung cấp các dịch vụ cho khách hàng. Chỉ truyền các dịch vụ độc lập với nội dung Thiếu mềm dẻo Kém hiệu quả trong sử dụng tài nguyên, bảo dưỡng, vận hành Kiến trúc tổng đài độc quyền làm giảm tính cạnh tranh và khả năng mở rộng mạng...

     48 p dtu 28/09/2012 146 3

  • Pattern Detection with Rare Itemset Mining

    Pattern Detection with Rare Itemset Mining

    he discovery of new and interesting patterns in large datasets, known as data mining, draws more and more interest as the quantities of available data are exploding. Data mining techniques may be applied to different domains and fields such as computer science, health sector, insurances, homeland security, banking and finance, etc. In this paper we are interested by the discovery of a specific category of patterns, known as rare and...

     17 p dtu 28/09/2012 149 1

  • Keyspace: A Consistently Replicated, Highly-Available Key-Value Store

    Keyspace: A Consistently Replicated, Highly-Available Key-Value Store

    This paper describes the design and architecture of Keyspace, a distributed key-value store offering strong consistency, fault-tolerance and high availability. The source code is available under the open-source AGPL license for Linux, Windows and BSD-like platforms. As of 2012, Keyspace is no longer undergoing active development.

     9 p dtu 28/09/2012 128 1

  • Incomplete Information in RDF

    Incomplete Information in RDF

    We extend RDF with the ability to represent property values that exist, but are unknown or partially known, using constraints. Following ideas from the incomplete information literature, we develop a semantics for this extension of RDF, called RDFi, and study SPARQL query evaluation in this framework.

     21 p dtu 28/09/2012 120 1

  • Formal Concept Analysis Based Association Rules Extraction

    Formal Concept Analysis Based Association Rules Extraction

    Generating a huge number of association rules reduces their utility in the decision making process, done by domain experts. In this context, based on the theory of Formal Concept Analysis, we propose to extend the notion of Formal Concept through the generalization of the notion of itemset in order to consider the itemset as an intent, its support as the cardinality of the extent and its relevance which is related to the confidence of rule....

     8 p dtu 28/09/2012 133 1

  • Database Semantics

    Database Semantics

    This paper, the first step to connect relational databases with systems consequence (Kent: "System Consequence" 2009), is concerned with the semantics of relational databases. It aims to to study system consequence in the logical/semantic system of relational databases. The paper, which was inspired by and which extends a recent set of papers on the theory of relational database systems (Spivak: "Functorial Data Migration" 2012), is linked...

     14 p dtu 28/09/2012 158 1

  • Cyclic Association Rules Mining under Constraints

    Cyclic Association Rules Mining under Constraints

    (Submitted on 18 Sep 2012) Several researchers have explored the temporal aspect of association rules mining. In this paper, we focus on the cyclic association rules, in order to discover correlations among items characterized by regular cyclic variation overtime. The overview of the state of the art has revealed the drawbacks of proposed algorithm literatures, namely the excessive number of generated rules which are not meeting the expert's...

     8 p dtu 28/09/2012 128 1

  • Shadow Theory: Data Model Design for Data Integration

    Shadow Theory: Data Model Design for Data Integration

    Shadow Theory: Data Model Design for Data Integration Jason T. Liu* (Draft. Date:9/12/2012) For data integration in information ecosystems, semantic heterogeneity is a known difficulty. In this paper, we propose Shadow Theory as the philosophical foundation to address this issue. It is based on the notion of shadows in Plato's Allegory of the Cave. What we can observe are just shadows, and meanings of shadows are mental entities that only...

     85 p dtu 28/09/2012 144 1

  • Tài liệu ôn thi tuyển sinh sau đại học môn tiếng Anh

    Tài liệu ôn thi tuyển sinh sau đại học môn tiếng Anh

    Tiếng Anh là một trong những ngoại ngữ của môn thi điều kiện bắt buộc đối với thí sinh dự tuyển sinh sau đại học tại trường Đại học Kinh tế TP.HCM. Nội dung và hình thức thi do Bộ giáo dục và Đào tạo qui định. Tài liệu ôn thi môn tiếng Anh gồm 2 phần chính: Mô tả bài thi và các bài thi mẫu.

     105 p dtu 24/02/2012 186 3

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