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  • About
  • 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.
541

Methodenentwicklung zur GIS-gestützten Standortanalyse von Solaranlagen auf Grundlage hochauflösender Laserscandaten / Developing methods for GIS-based site analysis of solar systems based on high-resolution laser scan data

Ludwig, Dorothea 08 March 2016 (has links)
Ziel der Arbeit ist die Methodenentwicklung zur Berechnung des Solarenergiepotenzials auf Dachflächen für sämtliche Gebäude eines großen Gebiets (Stadt, Landkreis) auf Grundlage von Laserscandaten. Die Methode zur Solarpotenzialberechnung wurde mit dem Hintergrund des notwendigen Handlungsbedarfs an Maßnahmen für den Klimaschutz entwickelt. Die Ausgabe des Solarpotenzials auf Dachflächen für alle Gebäude einer Verwaltungseinheit liefert flächendeckende und neutrale Informationen für den Bürger und die Verwaltung. Insbesondere die solare Nutzung auf den keiner Flächenkonkurrenz unterliegenden Dachflächen birgt enormes Potenzial und liefert einen wichtigen Beitrag zur Energiewende. Das Ergebnis dieser Arbeit präsentiert eine Methode, über die eine automatisierte Berechnung des Solarpotenzials auf Dachflächen auf Basis von Laserscandaten mit hoher Genauigkeitsausgabe für große Region realisierbar ist. Die Methode besteht aus sechs Prozessschritten. Es handelt sich um die Datenaufbereitung, die Selektion der homogenen Dachteilflächenbereiche, die Einstrahlungsanalyse, die Verschattungsableitung und die Berechnung des Solarpotenzials. Zudem wird eine Rohdatenkontrolle zur Qualitätsbewertung der Laserscandaten umgesetzt. Zentraler Verfahrensschritt ist die Ableitung der homogenen Dachteilflächen, die unter Berücksichtigung möglichst vieler auch kleiner Dachstrukturen gebildet werden. Das entwickelte Mehrfach-Thresholding Verfahren ermöglicht über die Auswertung der Dachneigung und Dachausrichtung die Separierung von planaren Dachteilflächen. Über den r.sun Algorithmus von GRASS GIS wird die Einstrahlungsanalyse umgesetzt, die den Sonnenstand über den Tag und das Jahr für den Betrachtungsort simuliert und die direkte, diffuse und Globalstrahlung auf die Dachfläche für unterschiedliche Zeitperioden ausgeben lässt. Die Jahressumme der Globalstrahlung wird für jede Dachteilfläche unter Ausschluss stark verschatteter Bereiche errechnet und dient als Grundlage für die Potenzialberechnung. Im Ergebnis enthält jedes Dachteilflächenpolygon Angaben zur geeigneten Modulfläche, zur Höhe der Globalstrahlung, zum potenziellen Stromertrag, zur potenziellen kW-Leistung und zur CO2-Einsparsumme. Datengrundlage sind Laserscandaten, die die Oberflächensituation mit sämtlichen Strukturen abbilden, sowie Gebäudeumringe aus den Liegenschaftsdaten zur Lokalisierung des Gebäudes beziehungsweise des Daches. Laserscandaten eignen sich, abhängig von der Qualität, sehr gut, um im Modell den Betrachtungs- und Einflussraum, der für die Ausgabe des Solarpotenzials auf Dachflächen wichtig ist, flächendeckend und realitätsnah abzubilden. Hier sind insbesondere das Dach insgesamt und die Dachstrukturen sowie die Vegetation, insbesondere Bäume und die Umgebungstopographie die wichtigen Elemente, die flächendeckend und in möglichst hoher Auflösung im Modell vorliegen und berücksichtigt werden sollen, da sie möglicherweise die ertragreiche und wirtschaftliche Nutzung einer Solaranalage verhindern. Über eine rasterbasierte Modellierung ermöglichen diese Daten die Berechnung der Standortparameter wie Dachneigung, Dachausrichtung, Verschattung, Einstrahlungsenergie und Dachflächengröße. An die Laserscandaten werden bestimmte qualitative Anforderungen gestellt, um eine Genauigkeit der Potenzialwerte zu garantieren. Das relativ junge Verfahren wurde in den vergangenen Jahren stark weiter entwickelt, die Lage- und Höhengenauigkeit und Punktdichte wurden deutlich erhöht. Zahlreiche Laserscandatensätze unterschiedlicher Qualität wurden ausgewertet. Die Arbeit beschreibt Mindestanforderungen an die Qualität der Daten, die für eine hohe Qualitätsausgabe des Solarpotenzials benötigt werden. Die Genauigkeit der Solarpotenzialergebnisse wurden über Gebäudepläne realer Objekte, Vor-Ort Messungen und Erträge von bestehenden PV-Anlagen evaluiert. Erzielbare Abweichungen von 2% in der Neigung und 1% in der Ausrichtung sind über die entwickelte Methode auf Grundlage von Laserscandaten mit ausreichender Qualität erreichbar. Größere Abweichungen mit 6% Prozent wurden bei der Dachflächengröße errechnet. Die Bewertung über Referenzanlagen und dessen spezifischem Stromertrag lieferte eine Abweichung von 1,2%. Die Evaluierungsergebnisse bestätigen den Methodenansatz und liefern gute Resultate in der Genauigkeit der Solarpotenzialwerte.
542

Управление таможенной деятельностью в условиях особой экономической зоны : магистерская диссертация / Administrating Customs Activities in The Special Economic Zone

Фельдшаров, В. Ю., Feldsharov, V. Y. January 2019 (has links)
В диссертации рассматриваются механизмы перепроектирования деятельности таможенного поста в условиях особой экономической зоны. Применение метода организационного моделирования и функционального анализа позволило автору разработать новую организационную архитектуру Верхнесалдинского таможенного поста в условиях особой экономической зоны «Титановая долина». Реализация проекта реорганизации Верхнесалдинского таможенного поста оптимизирует управленческие процессы таможенной деятельности и ставит управление самой особой эконмической зоны на более высокий уровень реализации региональных инвестиционных проектов. / The thesis deals with mechanisms of re-projecting a customs office within the special economic zone. The author develops new organizational architecture for Vyerkhnyaya Salda customs office within the Titan Valley special economic zone, applying the methods of organizational modelling and functional analysis. Realizing the reorganizational project for Vyerkhnyaya Salda customs office optimizes the administrative process in the customs activity and brings up the special economic zone administration to a higher level of realizing the regional investment projects.
543

Lipschitz Structure of Metric and Banach Spaces

Quilis Sandemetrio, Andrés 04 December 2023 (has links)
[ES] Desde el comienzo de la Teoría de Espacios de Banach, el estudio de los subespacios complementados y no complementados ha sido uno de los principales temas del área. Específicamente, en espacios de Banach no separables, han habido grandes esfuerzos en construir un marco teórico para describir la estructura de subespacios linealmente complementados en espacios de Banach. Concepctos clásicos como la Propiedad del Complemento Separable, Resoluciones Proyectivas de la Identidad, y la Propiedad de Plichko han sido y continúan siendo estudiadas en esta disciplina. En igual medida, las aplicaciones de Lipschitz en espacios de Banach también han jugado un papel importante en el desarrollo de la teoría. Cuestiones como la clasificación de Lipschitz de los espacios de Banach, la diferenciabilidad de las funciones de Lipschitz, o la existencia de retracciones de Lipschitz a subconjuntos y subespacios de espacios de Banach, son líneas de investigación activas con abundantes resultados y aplicaciones. En esta tesis analizamos la estructura de retractos de Lipschitz en espacios métricos y espacios de Banach no separables, de forma análoga a la teoría de complementación lineal en espacios de Banach. También discutimos la conexión de este tema con el progreso actual en el estudio de la estructura de los espacios de Lipschitz-free, y con el problema de la existencia de operadores de extensión lineales para funciones de Lipschitz. En primer lugar, generalizamos algunas herramientas clásicas de la teoría lineal al marco no lineal: Definimos el concepto de esqueletos retractivos de Lipschitz como una generalización a los esqueletos proyectivos. Como aplicación de estas nociones, demostramos que el espacio de Lipschitz-free asociado a un espacio de Banach con la propiedad de Plichko tiene a su vez la propiedad de Plichko. Utilizamos también los esqueletos retractivos de Lipschitz para caracterizar aquellos espacios métricos cuyo espacio de Lipschitz-free tiene la propiedad de Plichko con medidas de Dirac, y mostramos que el espacio de Lipschitz-free asociado a cualquier R-árbol es 1-Plichko con moléculas elementales. A continuación, pasamos a definir la Propiedad del Retracto de Lipschitz (α, β) (o la Lipschitz RP(α, β)) para un par de cardinales infinitos α ≤ β. Esta es la propiedad no lineal análoga a la clásica Propiedad del Complemento. Observamos que los espacios C(K) tiene la Lipschitz RP(ℵ0, ℵ0), lo cual implica que sus espacios de Lipschitz-free asociados poseen la Propiedad del Complemento Separable. Siguiendo con el estudio previo, construimos, para cada cardinal infinito Λ, un espacio métrico completo sin la Lipschitz RP(Λ, Λ)). En el caso numerable, podemos mejorar este resultado produciendo un espacio métrico completo que satisface una propiedad más fuerte que la negación de la Lipschitz RP(ℵ0, ℵ0): Todo subconjunto separable con almenos dos puntos no es un retracto de Lipschitz. Finalmente, generalizamos un resultado de Heinrich y Mankiewicz al marco no lineal al mostrar que en cada espacio métrico M, todo subconjunto está contenido en otro subconjunto con el mismo carácter de densidad que además admite un operador lineal de extensión de funciones Lipschitz. / [CA] Des del principi de la Teoria d'Espais de Banach, l'estudi dels subespais complementats i no complementats ha estat un dels principals temes de l'àrea. Específicament, en espais de Banach no separables, hi ha hagut un gran esforç de construir un marc teòric per descriure l'estructura de subespais linealment complementats en espais de Banach. Conceptes clàssics com la Propietat del Complement Separable, Resolucions Projectives de la Identitat, i la Propietat de Plichko han estat i continuen sent estudiades en aquesta disciplina. En igual mesura, les aplicacions de Lipschitz en espais de Banach també han jugat un paper important en el desenvolupament de la teoria. Qüestions com la classificació de Lipschitz dels espais de Banach, la diferenciabilitat de les funcions de Lipschitz, o l'existència de retraccions de Lipschitz a subconjunts i subespais d'espais de Banach, són línies d'investigació actives amb abundants resultats i aplicacions. En aquesta tesi analitzem l'estructura de retractes de Lipschitz en espais mètrics i espais de Banach no separables, de manera anàloga a la teoria de complementació lineal en espais de Banach. També discutim la connexió d'aquest tema amb el progrés actual en l'estudi de l'estructura dels espais de Lipschitz-free, i amb el problema de l'existència d'operadors d'extensió lineals per a funcions de Lipschitz. En primer lloc, generalitzem algunes eines clàssiques de la teoria lineal al marc no lineal: Definim el concepte d'esquelets retractius de Lipschitz com una generalització dels esquelets projectius. Com aplicació d'aquestes nocions, demostrem que l'espai de Lipschitz-free associat a un espai de Banach amb la propietat de Plichko té la propietat de Plichko. Utilitzem també els esquelets retractius de Lipschitz per a caracteritzar aquells espais mètrics que generen espais de Lipschitz-free amb la propietat de Plichko amb mesures de Dirac, i mostrem que l'espai de Lipschitz-free associat a qualsevol R-arbre és 1-Plichko amb molècules elementals. A continuació, passem a definir la Propietat del Retracte de Lipschitz (α, β) (o la Lipschitz RP(α, β)) per a un parell de cardinals infinits α ≤ β. Aquesta és la propietat no lineal anàloga a la clàssica Propietat del Complement. Observem que els espais C(K) tenen la Lipschitz RP(ℵ0, ℵ0), la qual cosa implica que els espais de Lipschitz-free associats posseeixen la Propietat del Complement Separable. Seguint amb l'estudi previ, construïm, per a cada cardinal infinit Λ, un espai mètric complet sense la Lipschitz RP(Λ, Λ). En el cas numerable, podem millorar aquest resultat produint un espai mètric complet que satisfà una propietat més forta que la negació de la Lipschitz RP(ℵ0, ℵ0): Tot subconjunt separable amb almenys dos punts no és un retracte de Lipschitz. Finalment, generalitzem un resultat de Heinrich i Mankiewicz al marc no lineal al demostrar que en cada espai mètric M, tot subconjunt està contingut en altre subconjut amb el mateix caràcter de densitat que a més admet un operador lineal d'extensió de funcions Lipschitz. / [EN] Since the inception of Banach Space Theory, the study of complemented and uncomplemented subspaces of Banach spaces has been one of the main themes of the area. Specifically, in non-separable Banach spaces, there have been many efofrts in constructing a theoretical framework to describe the linear complementation structure of Banach spaces. Classical concepts such as the Separable Complementation Property, Projectional Resolutions of the Identity, and the Plichko Property have been and continue to be studied in this area. Similarly, Lipschitz maps between Banach spaces have also played a main role in the development of the theory. Questions such as the Lipschitz classification of Banach spaces, difefrentiability of Lipschitz maps, or the existence of Lipschitz retractions onto subsets and subspaces of Banach spaces, have been and continue to be active topics of research with a wealth of results and applications. In this thesis we analyse the Lipschitz retractional structure of non-separable metric and Banach spaces, as an analogous theory to the linear complementation one in Banach spaces. We also discuss the connection of this topic with the ongoing program to study the structure of Lipschitz-free Banach spaces, and to the problem of finding bounded linear extension operators for Lipschitz functions. First, we generalize some classical tools of the linear theory to the non-linear setting: We define the concept of Lipschitz retractional skeletons as a generalization of Projectional skeletons. As applications of these concepts, we show that the Lipschitz-free space of a Plichko Banach space is again Plichko. We also use Lipschitz retractional skeletons to characterize metric spaces whose Lipschitz-free spaces enjoy the Plichko property witnessed by Dirac measures, and we show that the Lipschitz-free space of any R-tree is 1-Plichko witnessed by molecules. Next, we pass on to defining the (α, β) Lipschitz Retraction Property (Lipschitz RP(α, β) for short) for a pair of infinite cardinals α ≤ β. These are the non-linear analogues to the classical Complementation Properties. We observe that C(K) spaces enjoy the Lipschitz RP(ℵ0, ℵ0), which in turn implies that their associated Lipschitz-free space satisfy the Separable Complementation Property. As a continuation of the previous study, we construct, for every infinite cardinal Λ, a complete metric space which fails the Lipschitz RP(Λ, Λ). In the countable case, we are able to produce a complete metric space, called the skein space, with a stronger property than the negation of the Lipschitz RP(ℵ0, ℵ0): Every separable subset of the skein space with at least two points fails to be a Lipschitz retract. Finally, we generalize a result of Heinrich and Mankiewicz to the non-linear setting, by showing that for any metric space M, every subset is contained in another subset of the same density character which admits a bounded linear extension operator for the space of Lipschitz functions. / Quilis Sandemetrio, A. (2023). Lipschitz Structure of Metric and Banach Spaces [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/200447
544

MYCL promotes iPSC-like colony formation via MYC Box 0 and 2 domains / MYCLはMYC Box 0及び2ドメインを介してiPS細胞様コロニーの形成を促進する

Akifuji, Chiaki 23 March 2022 (has links)
京都大学 / 新制・課程博士 / 博士(医科学) / 甲第23817号 / 医科博第138号 / 新制||医科||9(附属図書館) / 京都大学大学院医学研究科医科学専攻 / (主査)教授 川口 義弥, 教授 藤田 恭之, 教授 江藤 浩之 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM
545

MULTI-LEVEL DEEP OPERATOR LEARNING WITH APPLICATIONS TO DISTRIBUTIONAL SHIFT, UNCERTAINTY QUANTIFICATION AND MULTI-FIDELITY LEARNING

Rohan Moreshwar Dekate (18515469) 07 May 2024 (has links)
<p dir="ltr">Neural operator learning is emerging as a prominent technique in scientific machine learn- ing for modeling complex nonlinear systems with multi-physics and multi-scale applications. A common drawback of such operators is that they are data-hungry and the results are highly dependent on the quality and quantity of the training data provided to the models. Moreover, obtaining high-quality data in sufficient quantity can be computationally prohibitive. Faster surrogate models are required to overcome this drawback which can be learned from datasets of variable fidelity and also quantify the uncertainty. In this work, we propose a Multi-Level Stacked Deep Operator Network (MLSDON) which can learn from datasets of different fidelity and is not dependent on the input function. Through various experiments, we demonstrate that the MLSDON can approximate the high-fidelity solution operator with better accuracy compared to a Vanilla DeepONet when sufficient high-fidelity data is unavailable. We also extend MLSDON to build robust confidence intervals by making conformalized predictions. This technique guarantees trajectory coverage of the predictions irrespective of the input distribution. Various numerical experiments are conducted to demonstrate the applicability of MLSDON to multi-fidelity, multi-scale, and multi-physics problems.</p>
546

The Chern character of theta-summable Cq-Fredholm modules

Miehe, Jonas Philipp 25 April 2024 (has links)
In this thesis, we develop a framework that generalizes the previously known notions of theta-summable Fredholm modules to the setting of locally convex dg algebras. By introducing an additional action of the Clifford algebra, we may treat the even and odd cases simultaneously. In particular, we recover the theory developed by Güneysu/Ludewig and extend the definition of odd theta-summable Fredholm modules to the differential graded category. We then construct a Chern character, which serves as a differential graded refinement of the JLO cocycle, and prove that it has all the expected analytical and homological properties. As an application, we prove an odd noncommutative index theorem relating the spectral flow of a theta-summable Fredholm module to the pairing of the Chern character with the odd Bismut-Chern character in entire (differential graded) cyclic homology, thereby extending results obtained by Güneysu/Cacciatori and Getzler.
547

A sociolinguistic investigation of gender stereotypes in AIDS discourse

Van de Wouwer, Pascale Martine 30 November 2003 (has links)
This research investigates how the speech community living in Maputo city uses language in relation to HIV/AIDS and studies related stigmas which impede women's access to HIV/AIDS counselling services. My hypothesis is that frequent use of gender stereotypes in AIDS discourse aims at stigmatising women as AIDS propagators, while minimizing male sexual transgressions in the AIDS crisis. Interpretation of primary data collected via focus group discussions and interviews is done with five different approaches that study respectively: social meanings and representations of AIDS embedded in context, the stigmatising process correlating gender stereotypes and discrimination against women, stereotypical speech attitudes and speech mechanism as well as the functions and effects of stereotyping. My conclusion is that deeply rooted gender barriers are to be removed in order to combat the social plague of AIDS and that ethnography of communication offers interesting models for development projects that can initiate behavioural changes through speech. / Linguistics / M.A. (Sociolinguistics)
548

A high order Discontinuous Galerkin - Fourier incompressible 3D Navier-Stokes solver with rotating sliding meshes for simulating cross-flow turbines

Ferrer, Esteban January 2012 (has links)
This thesis details the development, verification and validation of an unsteady unstructured high order (≥ 3) h/p Discontinuous Galerkin - Fourier solver for the incompressible Navier-Stokes equations on static and rotating meshes in two and three dimensions. This general purpose solver is used to provide insight into cross-flow (wind or tidal) turbine physical phenomena. Simulation of this type of turbine for renewable energy generation needs to account for the rotational motion of the blades with respect to the fixed environment. This rotational motion implies azimuthal changes in blade aero/hydro-dynamics that result in complex flow phenomena such as stalled flows, vortex shedding and blade-vortex interactions. Simulation of these flow features necessitates the use of a high order code exhibiting low numerical errors. This thesis presents the development of such a high order solver, which has been conceived and implemented from scratch by the author during his doctoral work. To account for the relative mesh motion, the incompressible Navier-Stokes equations are written in arbitrary Lagrangian-Eulerian form and a non-conformal Discontinuous Galerkin (DG) formulation (i.e. Symmetric Interior Penalty Galerkin) is used for spatial discretisation. The DG method, together with a novel sliding mesh technique, allows direct linking of rotating and static meshes through the numerical fluxes. This technique shows spectral accuracy and no degradation of temporal convergence rates if rotational motion is applied to a region of the mesh. In addition, analytical mappings are introduced to account for curved external boundaries representing circular shapes and NACA foils. To simulate 3D flows, the 2D DG solver is parallelised and extended using Fourier series. This extension allows for laminar and turbulent regimes to be simulated through Direct Numerical Simulation and Large Eddy Simulation (LES) type approaches. Two LES methodologies are proposed. Various 2D and 3D cases are presented for laminar and turbulent regimes. Among others, solutions for: Stokes flows, the Taylor vortex problem, flows around square and circular cylinders, flows around static and rotating NACA foils and flows through rotating cross-flow turbines, are presented.
549

Novel bioinformatics programs for taxonomical classification and functional analysis of the whole genome sequencing data of arbuscular mycorrhizal fungi

Kang, Jee Eun 10 1900 (has links)
No description available.
550

PLANT-ENDOPHYTE INTERPLAY PROTECTS TOMATO AGAINST A VIRULENT VERTICILLIUM DAHLIAE

Shittu, Hakeem Olalekan 05 October 2010 (has links)
When tomato Craigella is infected with Verticillium dahliae Dvd-E6 (Dvd-E6), a tolerant state is induced with substantial pathogen load, but few symptoms. Unexpectedly, these plants are more robust and taller with Dvd-E6 behaving as an endophyte. Some endophytes can protect plants from virulent pathogens. This research was undertaken to improve understanding of the cellular and molecular nature of Verticillium tolerance in tomato, especially whether infection by Dvd-E6 can protect Craigella from virulent V. dahliae, race 1 (Vd1). To permit mixed infection experiments a restriction fragment length polymorphism (RFLP)-based assay was developed and used for differentiating Dvd-E6 from Vd1, when present in mixed infections. The results suggested that protection involves molecular interplay between Dvd-E6 and Vd1 in susceptible Craigella (CS) tomatoes, resulting in restricted Vd1 colonization. Further studies showed a dramatic reduction of Vd1 spores and mycelia. To examine genetic changes that account for these biological changes, a customized DNA chip (TVR) was used to analyze defense gene mRNA levels. The defense gene response was categorized into four groups. Group 1 was characterized by strong induction of defense genes followed by suppression. However, Vd1-induced gene suppression was blocked by Dvd-E6 in mixed infections. These genes included some transcription factors and PR proteins such as class IV chitinases and beta glucanases which are known to target fungal spores and mycelia. Experiments also were repeated with a Craigella resistant (CR) isoline containing a fully active Ve locus (Ve1+ and Ve2+). The biological results showed that the presence of the Ve1+ allele resulted in restricted Vd1 colonization and, in a mixed infection with Dvd-E6, Vd1 was completely eliminated from the plant stem. Surprisingly, there was no significant increase in defense gene mRNAs. Rather, elevated basal levels of defense gene products appeared sufficient to combat pathogen attack. To investigate functional effects of the genetic changes observed, an inducible RNAi knockdown vector for a defense gene (TUS15G8) with unknown function (pMW4-TUS15G8) as well as the Ve2 resistance gene (pMW-Ve2) was prepared as a initial step for future transformation analyses. Taken together the results reveal intriguing but complex biological and molecular changes in mixed infections, which remain a basis for future experiments and potential agricultural benefits. / Canadian Commonwealth Scholarship and Fellowship Plan

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