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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.
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Showing 1 to 10 of 787 (0.038 seconds)| 1 |
Sistema robótico com controlo de força para operações de furaçãoRosa, Diego Gabriel Gomes January 2013 (has links)
Tese de Mestrado Integrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2013
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O tempo de reverberação e a inteligibilidade da palavra : caso de estudo: salas de aula da FEUPSilva, Carlos Miguel Ferreira e January 2013 (has links)
Tese de Mestrado Integrado. Engenharia Civil - Especialização em Construções. Faculdade de Engenharia. Universidade do Porto. 2013
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Classificação da informação na indústria da construção : perspectivas e percursosMonteiro, Paulo Miguel Pereira Duarte January 1998 (has links)
Tese de Mestrado. Construção de Edifícios. Faculdade de Engenharia. Universidade do Porto. 1998
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Projeto e desenvolvimento de um automóvel híbridoDias, Carlos Miguel Teixeira January 2013 (has links)
Tese de Mestrado integrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2013
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Surface Roughening Enhancement on SapphireChan, Min-Chao 27 July 2010 (has links)
We discuss the self-assembled Ni nanoparticles as the etching mask process and produce patterned sapphire substrate in this study. In the Ni nanoparticles formation process, we focus on two major factors which make the Ni films transform into Ni ball, (1)annealing temperature, (2) film thickness.
In the experiment, we deposit 2000Ǻ SiO2 on sapphire substrate, and use the E-gun to deposit 100~200Ǻ Ni film. After the Ni film deposition, we use the rapid thermal annealing at 900oC standing for 60sec, and make the Ni film transform into Ni spherical calotte which is resulting from the Ni film cohesive force. In the SiO2 etching process, we use CF4, 20sccm as reactive gas and the Ni calotte as etching mask to form SiO2 nanopillars. Then, we mixed Cl2 and SiCl4 reactive gas, 5sccm and 20sccm, and use SiO2 nanopillars as the etching mask in the dry etching process to form patterned sapphire substrate.
We obtain the optimum rapid thermal annealing for self-assembled Ni calotte at 100, 200Ǻ Ni film. We got the patterned sapphire substrate nanopillars at density of 1.59x109cm-2, average height ~64.3nm, average diameter ~106nm, and density of 6.20x108cm-2, average height ~160nm, average diameter ~193nm for 100, and 200Ǻ Ni film process condition, respectively. We use 160nm sapphire nanopillars to increase 18.0-10.3% scattering light for 350~450nm blue light LED application.
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A study of the Fu of Pan Ni (250-311) = Pan ni fu yan jiu /Chiu, Cheung-ki. January 2002 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2002. / Includes bibliographical references (leaves 232-250).
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Ni Yunlin zhi shi hua yan jiuYu, Lianxi. January 1900 (has links)
Thesis (M.A.)--Guo li Taiwan shi fan da xue. / Cover title. Includes bibliographical references (2nd group).
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A study of the Fu of Pan Ni (250 - 311) Pan Ni fu yan jiu /Chiu, Cheung-ki. January 2002 (has links)
Thesis (M.Phil.)--University of Hong Kong, 2002. / Includes bibliographical references (leaves 232-250) Also available in print.
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Yuan si jia zhong Ni Yunlin zhi yan jiuSong, Lihuan. January 1900 (has links)
Thesis (M.A.) -- Zhongguo wen hua xue yuan / Reprint of ms. copy. Includes bibliography.
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Ni Yunlin zhi shi hua yan jiuYu, Lianxi. January 1900 (has links)
Thesis (M.A.)--Guo li Taiwan shi fan da xue. / Cover title. Includes bibliographical references (2nd group).
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