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Bibliografie tematiche / I-517

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Letteratura scientifica selezionata sul tema "I-517"

Autore: Grafiati

Pubblicato: 25 luglio 2024

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Tesi sul tema "I-517"

1

Ziyatdinov, Andrey. "Biomimetic set up for chemosensor-based machine olfaction." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/285128.

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Abstract (sommario):

The thesis falls into the field of machine olfaction and accompanying experimental set up for chemical gas sensing. Perhaps more than any other sensory modality, chemical sensing faces with major technical and conceptual challenges: low specificity, slow response time, long term instability, power consumption, portability, coding capacity and robustness. There is an important trend of the last decade pushing artificial olfaction to mimic the biological olfaction system of insects and mammalians. The designers of machine olfaction devices take inspiration from the biological olfactory system

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2

Peco, Regales Christian. "Approximation of phase-field models with meshfree methods: exploring biomembrane dynamics." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/284209.

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Abstract (sommario):

Las biomembranas constituyen la estructura de separación fundamental en las celulas animales, y son importantes en el diseño de sistemas bioinspirados. Su simulación presenta desafíos, especialmente cuando ésta implica dinámica y grandes cambios de forma o se estudian sistemas micrométricos, impidiendo el uso de modelos atomísticos y de grano grueso. El objetivo principal de esta tesis es el desarrollo de un marco computacional para entender la dinámica de biomembranas inmersas en fluido viscoso usando modelos de campo de fase. Los modelos de campo de fase introducen un campo escalar contínuo

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3

Garcia, David (Garcia Carrera). "La excavación urbana y los edificios vecinos." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/312842.

Testo completo

Abstract (sommario):

Currently, the intervention in urban excavations with greater dimension and depth is increasing in importance exponentially. The great sensitivity of the overlying buildings to the displacements and tensions produced in its foundations due to ground movements behind the retaining wall and the lack of resources and calculation criteria that the professionals who have to design these structural systems have to deal with, often produce unacceptable damage in the existing buildings. This document presents the extensive bibliography describing the research for nearly 70 years, that has been devel

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4

Bruna, Floris Lluís. "Estudi de l'estabilitat lineal de l'equació d'Einstein en els models de Robertson-Walker." Doctoral thesis, Universitat Autònoma de Barcelona, 2004. http://hdl.handle.net/10803/3085.

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5

Jiménez, Jiménez Ma José (María José). "Ecuaciones en diferencias lineales de segundo orden y su aplicación al análisis matricial." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/387126.

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Abstract (sommario):

It is well known the important role that difference equations play in several problems of the engineering or of the science. However, whereas the expression of the solutions when the coefficients of the equations are constant is widely known, the same does not happen for variable coefficients, except for the simplest case of first order equations. This work presents an analysis of the second order linear difference equations equations in the infinite, semi-infinite and finite cases. Moreover, for second order difference equations in the finite case, we study its associated boundary value prob

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6

Encinas, Bachiller Andrés Marcos. "Problemas de contorno discretos." Doctoral thesis, Universitat Politècnica de Catalunya, 2001. http://hdl.handle.net/10803/5904.

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Abstract (sommario):

En este trabajo se ha desarrollado un cálculo vectorial sobre estructuras discretas, análogo al de los modelos continuos. Para ello se ha considerado como espacio subyacente un multigrafo finito o variedad discreta y se ha definido el concepto de espacio tangente a cada vértice. A partir de esta noción se han definido los distintos tipos de campos sobre la variedad y se ha introducido la estructura de variedad Riemanniana discreta, lo que ha posibilitado construir los operadores gradiente, divergencia y Laplaciano. La consideración de métricas generales sobre los multigrafos tiene consecuenc

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7

López, Pablo Carlos. "Development of a new automated method for the quantification of nuclear immunohistochemical markers." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/8893.

Testo completo

Abstract (sommario):

Antecedentes: La evaluación de marcadores inmunohistoquímicos se realiza con fines diagnósticos, terapéuticos e investigadores de forma manual. La utilización del análisis informatizado de imágenes digitales para evaluar estos marcadores aún no es suficientemente eficaz. <br/>Objetivos: Diseñar un nuevo procedimiento informatizado para cuantificar marcadores inmunohistoquímicos nucleares y evaluar los efectos de la compresión de imágenes. <br/>Métodos: El procedimiento desarrollado consta de diferentes etapas, donde se evalúan diferentes marcadores immunohistoquímicos utilizados en cáncer de

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8

Gutiérrez, i. Serrés Pere. "Estabilitat efectiva i tors invariants de sistemes hamiltonians quasi-integrables." Doctoral thesis, Universitat de Barcelona, 1995. http://hdl.handle.net/10803/2108.

Testo completo

Abstract (sommario):

La memòria recull contribucions a diversos aspectes del problema de l'estabilitat en sistemes hamiltonians quasi-integrables. Aquests aspectes inclouen resultats d'estabilitat efectiva, que comporten el confinament de trajectòries durant un interval de temps molt gran, i també resultats que estableixen l'existència de tors invariants, entre els quals distingim els tors KAM i tors de dimensió inferior.<br/><br/>Considerem un sistema hamiltonià quasi-integrable, amb <i>n</i> graus de llibertat, en el qual la mida de la pertorbació és "Epsilon". Malgrat la possibilitat de difusió en aquest tipus

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9

Grau, Gotés Ma Àngela (Maria Àngela). "On iterative methods to solve nonlinear equations." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/396684.

Testo completo

Abstract (sommario):

Many of the problems in experimental sciences and other disciplines can be expressed in the form of nonlinear equations. The solution of these equations is rarely obtained in closed form. With the development of computers, these problems can be addressed by numerical algorithms that approximate the solution. Specifically, fixed point iterative methods are used, which generate a convergent sequence presumably to the solution of the equation or system of equations. Since J.F. Traub (Iterative methods for the solution of equations, Prentice-Hall, N.J. 1964) initiated the qualitative as well the q

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10

Hernández, Ramírez Daría Micaela. "Análisis estadístico de corpus cronológicos : aplicación al estudio de bases bibliográficas y textos retóricos." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/404539.

Testo completo

Abstract (sommario):

Due to the huge amount of textual data that is persintently generated, researchers are obliged to classify and analize them, even though there are different ways as well as computing tools to facilitate their study. In this thesis a procedure method as well as its computing tools are given in order to analyze chronological corpus. Our goal is focused mainly in analysing the corpus structure and clarifying the vocabulary flow. The proposed statistical methodology follows the one described by Bécue-Bertaut (2014) which allows the combination of classic multidimensional methods for data analysis

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