نتایج جستجو برای: spectrum reuse

تعداد نتایج: 250609  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی شاهرود - دانشکده کامپیوتر و فناوری اطلاعات 1391

تشخیص زنده بودن اثر انگشت، مبحثی جدید در حوزه امنیت سیستم های تشخیص هویت بر اساس اثر انگشت است. یکی از روش های تشخیص زنده بودن اثر انگشت، روش power spectrum است، که بر اساس آنـالـیـزهـای فـرکـانسی است. استفاده از این روش نتایج امیدوارکننده ای را در تشخیص حالات زنده و جعلی اثر انگشت داشته است. در این پایان نامه از این روش برای مقایسه اثر انگشت های مصنوعی sfinge با اثر انگشت های واقعی استفاده شده...

2003
Tom Van Leeuwen Ingrid Moerman Hendrik Rogier Bart Dhoedt Daniël De Zutter Piet Demeester

Authors Tom Van Leeuwen, Ingrid Moerman, Hendrik Rogier, Bart Dhoedt, Daniël De Zutter, Piet Demeester Ghent University, Belgium Contact: Ingrid Moerman Department of Information Technology (INTEC), Ghent University – IMEC, Sint Pietersnieuwstraat 41 B-9000 Ghent, Belgium. Tel: +32 9 267 35 73 Fax: +32 9 267 35 99 Email: [email protected] Today our society is struggling more and mo...

2014
Younes BALBOUL

The fourth-generation networks based on OFDMA (3GPP LTE) (3rd Generation Partnership Project Long Term Evolution) offer high bit rate and takes into account in their mechanisms the simplicity and efficiency of the radio transmission. But with the volume of traffic constantly increasing, especially in high density population environments, the reuse of bandwidth is the only effective way to incre...

2012
Tetsuya YAMAMOTO Fumiyuki ADACHI

Multiple-input multiple-output (MIMO) spatial multiplexing achieves very high spectrum efficient signal transmissions in a cellular network (CN). However, this is only possible when the received signal-to-interference plus noise power ratio (SINR) is high enough. In a conventional CN, multiple antennas are colocated at each based station (BS) and hence, the throughput of a mobile terminal (MT) ...

Journal: :Electronics 2021

Cognitive radio (CR) has evolved as a novel technology for overcoming the spectrum-scarcity problem in wireless communication networks. With its opportunistic behaviour improving spectrum-usage efficiency, CR enables desired secondary users (SUs) to dynamically utilize idle spectrum owned by primary users. On sensing identify frequency bands, proper spectrum-allocation mechanisms need be design...

Mohammad Hossein Niksokhan, Shervin Jamshidi

Reclamation and reuse programs are an indispensable part of integrated water resource management, particularly in arid and semi arid regions. Yet, the feasibility of sustainable application not only is relied on design, operation and maintenance of wastewater treatment plants, but also could be influenced by the economical and environmental aspects of reuse demands. This study is aimed to illus...

1997
Leo Obrst Krishna Nanda Jha

This paper describes a useful set of NLP tools which has been successfully applied to many different kinds of industrial requirements spanning multiple domains and applications at Boeing. The tools can be combined to constitute a full-spectrum natural language system and can be customized for new domains relatively easily. To date, this array of formal and natural language processing technologi...

2007
Kevin J. Sullivan John C. Knight

Large-scale systematic reuse promises rapid development of significant systems through straightforward composition of large-scale existing assets. The realization of this promise would provide major benefits in many areas. For example, sophisticated software-engineering tools could be developed rapidly and inexpensively to deliver promising software engineering research results into practice. T...

2015
Qiang Huang

Metallization of silicon solar cells using electroplating is of interest recently as a cheaper replacement of silver screen printing. Light assisted electroplating of Nickel-Cobalt (NiCo) alloys were studied on crystalline silicon (Si) solar cells in this paper. The effect of illumination was investigated in conjunction with the light absorption properties of the plating solution, emission spec...

2014
D. R. Leadley

The Open University's repository of research publications and other research outputs Application of Bryan's algorithm to the mobility spectrum analysis of semiconductor devices Journal Article (2003). Application of Bryan's algorithm to the mobility spectrum analysis of semiconductor devices. Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or ...

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