Essays about: "CRN"

Showing result 16 - 19 of 19 essays containing the word CRN.

  1. 16. Performance Analysis of Cognitive Radio Network over SIMO System

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Iqbal Hasan Haider; MD. Fazla Rabby; [2012]
    Keywords : Cognitive Radio; Outage Probability; Symbol Error Probability; Single Input Multiple Output; Selection Combining; Spectrum Sharing System.;

    Abstract : As resources are limited, radio spectrum becomes congested due to the growth of wireless applications. However, measurements address the fact that most of the licensed spectrums experience low utilization even in intensively teeming areas. READ MORE

  3. 17. Effects of tempering on corrosion properties of high nitrogen alloyed tooling steels in pyrolysis oil

    University essay from KTH/Korrosionslära

    Author : Ashkan Reza Gholi; [2011]
    Keywords : High nitrogen alloyed tooling steel; Pyrolysis; Tempering process; Primary and secondary chromium precipitates; Pitting corrosion; General corrosion;

    Abstract : Nowdays biofuels are becoming a good alternative for petroleum fuels due to environmental issues like high carbon dioxide emission and increasing vehicles population, together with the high price and fast depletion of petroleum oils. This project aims to investigate the corrosive effects of wood Pyrolysis oil on a special grade of nitrogen alloyed tooling steels to be used for injector nozzles in Diesel engines, where high stress and strain encounter high acidity and corrosivity of the Pyrolysis oil and cause breakdown over short periods. READ MORE

  4. 18. Tribological characterization of selected hard coatings

    University essay from Karlstads universitet/Fakulteten för teknik- och naturvetenskap

    Author : Patrik Karlsson; [2009]
    Keywords : Tribology;

    Abstract : Hard coatings are often used for protection of tool surfaces due to coating properties like low friction and high wear resistance. Even though many of the hard coatings have been tested for wear, it is important to try new wear test setups to fully understand tribological mechanisms and the potential of hard coatings. READ MORE

  5. 19. Investigation of interfacial microstructure of CrN coatings on HSS substrates pretreated by HIPIMS for adhesion enhancement

    University essay from Institutionen för fysik, kemi och biologi

    Author : Daniel Jädernäs; [2006]
    Keywords : HIPIMS; CrN; Pretreatment; Hard Coatings; Magnetron Sputtering;

    Abstract : In this study, six dc Magnetron Sputtered (dcMS) CrN hard coatings were deposited on pretreated High Speed Steel (HSS) to achieve different interface architectures. The aim was to correlate the interfacial microstructure to the adhesion of the coatings. READ MORE