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Data compression systems.Husson, Georges Eugene. January 1970 (has links)
No description available.
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Data compression systems.Husson, Georges Eugene. January 1970 (has links)
No description available.
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The use of matrix decomposition for data mining and subscriber classification in mobile cellular networks.João, Zolana Rui. January 2011 (has links)
M. Tech. Electrical Engineering. / Telecommunication databases contain billions of records and are among the largest in the world, reaching around 30 terabits (30 trillion bits). Data mining is a proven solution for analysing such large volumes of data where traditional methods of turning data into knowledge are impractical. However, the increasing size (scalability), complexity (complex data types) and high dimensionality of telecommunication databases pose a significant challenge for conventional data mining approaches. In this dissertation, a matrix decomposition method (Singular Value Decomposition or SVD) is used to improve data mining for subscriber classification in mobile cellular networks. Using a large real mobile network dataset, the performance of a standard data mining approach (for clustering analysis) is evaluated when it is used with, and without, matrix decomposition. The proposed approach decreases the computational cost, for a given size of data (in terms of number of rows and columns). We also demonstrate improvement of the quality of clusters, yielding the following improvements in clustering assessment indices: 2.45% in Jaccard score, 3.5% in purity, and 1.35% in efficiency. Subscribers with different behaviours in the network are classified on the basis of various features; SVD analysis on their voice, text message, and data usage patterns are also performed. The proposed data mining model can be used for business intelligence activities such as customer segmentation, traffic modelling and social network analysis.
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A multichannel computer network with local and global transceiving media.January 1985 (has links)
by Wong Po Choi. / Bibliography: leaves 47-50 / Thesis (M.Ph.)--Chinese University of Hong Kong, 1985
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Data compression with particular applications to video signals.Tsui, Stephen S. T. January 1972 (has links)
No description available.
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Data compression with particular applications to video signals.Tsui, Stephen S. T. January 1972 (has links)
No description available.
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Development of dynamically reconfigurable ground station softwareMarais, Hendrik Gideon 12 1900 (has links)
Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2007. / Applications are normally developed with a specific purpose in mind and when
new features are needed the source code has to be modified, recompiled and
redistributed. It will be more beneficial if new features can be dynamically
added during runtime without the need to disrupt execution, especially in the
case of ground station software.
This thesis is about the implementation of a dynamic development environment
within which a modular system can be created from existing components
that can be extended with additional components at any time. The interaction
between these components can then be specified which can result in a
completely automated system.
It is concluded that the graphical tools of such an environment can make it
easy for people who do not necessarily have programming knowledge to build
a system from existing components that can be extended and reconfigured
whenever necessary.
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A case study of large project management: an interim development review on the Dragon System in Hong Kong Telephone.January 1993 (has links)
by Lam Chak Hou, Sunny, Yung Kai Tin, William. / Thesis (M.B.A.)--Chinese University of Hong Kong, 1993. / Includes bibliographical references (leaf 58). / ABSTRACT --- p.i / TABLE OF CONTENTS --- p.ii / LIST OF FIGURES --- p.iii / PREFACE --- p.iv / CHAPTER / Chapter I. --- INTRODUCTION --- p.1 / Study Objectives --- p.4 / Chapter II. --- APPROACHES AND METHODOLOGY --- p.5 / Approach --- p.5 / Methodology --- p.6 / Chapter III. --- THE COMPANY --- p.8 / Hongkong Telecom (HKT) --- p.8 / Subsidiaries --- p.9 / Joint Ventures --- p.11 / Chapter IV. --- EXISTING SYSTEMS --- p.12 / Real-time Online Sales Executive (ROSE) --- p.15 / Subscriber Services Control (SSC) --- p.16 / Subscriber Billing (SBS) --- p.17 / Shortfalls of existing systems --- p.19 / Chapter V. --- DRAGON PROJECT --- p.21 / Background --- p.21 / Dragon System Functional Description --- p.23 / Dragon Project Team --- p.29 / Initial Project Plan --- p.32 / Project Management Mechanism --- p.34 / Project Status --- p.36 / Chapter VI. --- PROBLEMS --- p.38 / Chapter VII. --- CONCLUSIONS --- p.43 / Chapter VIII --- RECOMMENDATIONS --- p.49 / Dragon Project --- p.49 / Package Implementation in general --- p.54 / Final Comments --- p.58 / BIBLIOGRAPHY --- p.59
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