956 resultados para concave refractive microlens array


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Dissertação de mestrado em Optometria Avançada

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Dissertação de mestrado em Optometria Avançada

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We demonstrate the first example of silicon nanowire array photocathodes coupled with hollow spheres of the emerging earth-abundant cobalt phosphide catalysts. Compared to bare silicon nanowire arrays, the hybrid electrodes exhibit significantly improved photoelectrochemical performance toward the solar-driven H2 evolution reaction.

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Dissertação de mestrado integrado em Engenharia Eletrónica Industrial e de Computadores

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Text Mining has opened a vast array of possibilities concerning automatic information retrieval from large amounts of text documents. A variety of themes and types of documents can be easily analyzed. More complex features such as those used in Forensic Linguistics can gather deeper understanding from the documents, making possible performing di cult tasks such as author identi cation. In this work we explore the capabilities of simpler Text Mining approaches to author identification of unstructured documents, in particular the ability to distinguish poetic works from two of Fernando Pessoas' heteronyms: Alvaro de Campos and Ricardo Reis. Several processing options were tested and accuracies of 97% were reached, which encourage further developments.

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Doctoral Dissertation for PhD degree in Chemical and Biological Engineering

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Tese de Doutoramento em Biologia de Plantas MAP - Bioplant

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Dissertação de mestrado em Técnicas de Caracterização e Análise Química

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Dissertação de mestrado em Optometria Avançada

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Dissertação de mestrado em Optometria Avançada