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Имена собственные в русской и китайской фразеологии : магистерская диссертация / Proper nouns in Russian and Chinese idiomsGu, F., Гу, Ф. January 2015 (has links)
The dissertation is devoted to the integrated comparative analysis proper nouns of Russian and Chinese phraseological units. The work includes an introduction, two chapters, conclusions, lists of bibliography and dictionaries. The thematic classification of onims are presented, national-cultural and emotional semantics of Russian and Chinese idioms with рroper name analyzed in the dissertation.
This work is intended for specialists who are interested in the similarities and differences between the Chinese and Russian language picture of the world. / Диссертация посвящена комплексному сопоставительному анализу имен собственных в составе фразеологизмов русского и китайского языков. Работа включает введение, две главы, заключение, списки использованной литературы и словарей. В диссертации представлены тематические классификации онимов, проанализирована национально-культурная и эмоционально-оценочная семантика русских и китайских фразеологизмов с именем собственным. Работа предназначена для специалистов, которых интересуют сходства и различия между русской и китайской языковыми картинами мира.
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Имя и местоимение в прозе Марины Цветаевой : магистерская диссертация / The proper name and pronoun in the M.Tsvetaeva’s proseДжаббарова, Е. Я., Djabbarova, E. Y. January 2016 (has links)
The paper is devoted to the specific functionality of proper names and pronouns and their connection with the author’s worldview in the poet’s prose. Crucial consistent patterns in using of proper names and pronouns are revealed. The great number of Tsvetaeva's prose in the period from 1917 to 1938, including such genres as: philological treatises, critical articles, essays and fiction, was analyzed. Moreover, the paper highlights the transformation of the proper names and personal pronouns in Tsvetaeva’s prose and separately analyzed the features characteristic of the phenomenon of «poet’s prose». / Работа посвящена специфике функционирования имени и местоимения в прозе поэта с особенностями цветаевского мировосприятия. Выявлены основные закономерности в употреблении имен собственных и личных местоимений в прозаических текстах поэта. Проанализирован обширный пласт прозы Цветаевой в период с 1917 по 1938 год, включая такие жанры как: филологические трактаты, критические статьи, эссе и художественная проза. В работе показана трансформация имен собственных и личных местоимений в прозаических текстах поэта, а также отдельно проанализированы особенности, характерные для феномена «проза поэта».
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¿Tienen significado los nombres propios?: Una aproximación al debate inconcluso en torno a la semántica y (difusa) categorización de nombres propios y comunesBahr, Christian, Arocha, Héctor Hernández 07 February 2023 (has links)
This paper discusses the major linguistic theories concerned with the
distinction between proper and common names. At the same time, it aims to show
that a border line between both categories cannot be drawn without answering
the question about the capacity of proper names to express denotative meaning.
There seems to be little agreement in this respect since the classical points of view
linked to Mill and Jespersen, which is why linguists and philosophers still lack a
common understanding on this point. In order to clarify the origin of this debate,
it will be approached from different perspectives and fields of linguistics, including an analysis of Eugenio Coseriu’s position revealed in a manuscript on this
topic made available by the Eugenio-Coseriu-Foundation (www.coseriu.org) and
which has remained unpublished until nowadays
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Two-phase flow instabilities in an open natural circulation systemManthey, René 20 December 2022 (has links)
Die vorliegende Arbeit befasst sich mit der Stabilitätsuntersuchung von offenen Naturumlaufsystemen als Grundlage zur Verwendung als passives Wärmeabfuhrsystem im Sicherheitsbehälter eines Siedewasserreaktors.
Der Betrieb eines solchen Systems im Naturumlauf basiert einzig auf der Ausbildung eines Dichtegradienten, der infolge einer freien Konvektion zu einer Strömung innerhalb dieses Systems führt.
Dieser Dichtegradient im Arbeitsfluid wird durch die Wärmezu- und -abfuhr hervorgerufen.
Der sich ausbildende und kontinuierlich steigende Massenstrom geht bei Erreichen der Sättigungstemperatur in Massenstromoszillationen, den sogenannten Zweiphasenströmungsinstabilitäten, über.
Mit steigender Temperatur des Arbeitsfluides kehrt der Massenstrom zu einer stabilen Strömung und kontinuierlichen Wärmeabfuhr zurück, jedoch als Zweiphasenströmung.
Es wurde an der Technischen Universität Dresden eine Versuchsanlage errichtet, die den Gebäudekondensator des KERENA\textsuperscript{TM}(ehemals SWR1000)-Reaktorkonzepts nachstellt, um die Anlagen- und die Betriebscharakteristik hinsichtlich geometrischer Einflüsse zu bewerten.
Mit Hilfe hochauflösender Temperatur und Volumendampfgehaltsmessung wurde festgestellt, dass bei parallel angeordneten Steigrohren die durch Kondensationsschläge hervorgerufenen Druckschläge stark reduziert oder sogar unterbunden werden konnten.
So fungiert eines der Steigrohre als Puffer für rückströmendes unterkühltes Fluid aus der Wärmesenke in dem anderen.
Zusammengefasst wurde zudem die Betriebscharakteristik in Stabilitätskarten, die die stabile Einphasenströmung, die instabile Zweiphasenströmung und die stabile Zweiphasenströmung eindeutig voneinander abgrenzt.
Die Vorhersage der Stabilitätsgrenze zwischen instabiler und stabiler Zweiphasenströmung durch einen analytischen Ansatz ist gelungen.
Das zugrundeliegende Modell für ein solches offenes Naturumlaufsystem wurde durch die Methode der gewichteten Residuen und die Finite-Volumen-Methode gelöst und mit Hilfe der Proper Orthogonal Decomposition auf ein Modell niedriger Ordnung reduziert (ROM).
Vergleichsrechnungen mit einem entwickelten Abbild des Versuchsstandes GENEVA unter Verwendung des bereits validierten Systemcodes ATHLET der \textit{Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH} bestätigten die berechneten Betriebszustände und letztendlich die durch die lineare Stabilitätsuntersuchung ermittelte Stabilitätsgrenze.
Eben dieses ROM bildet die Zweiphasenströmung mittels des \textit{Drift-flux mixture} Modells ab, welches die relativen Geschwindigkeiten jeder Phase berücksichtigt.
Die nichtlineare Stabilitätsuntersuchung dieses ROMs ergab an ausgewählten Referenzbetriebspunkten superkritische Hopfbifurkationen, die nur durch die Detektion aufkommender stabiler Grenzzyklen während der numerischen Integration nachgewiesen werden konnten.
Parameterstudien zur Stabilitätsanalyse können durch dieses ROMs unter erheblicher Reduktion von Rechenaufwand durchgeführt werden.
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Expedient Modal Decomposition of Massive Datasets Using High Performance Computing ClustersVyapamakula Sreeramachandra, Sankeerth 02 August 2018 (has links)
No description available.
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VALIDATING STEADY TURBULENT FLOW SIMULATIONS USING STOCHASTIC MODELSChabot, John Alva 07 October 2015 (has links)
No description available.
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Model Order Reduction of Incompressible Turbulent FlowsDeshmukh, Rohit January 2016 (has links)
No description available.
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Reduced order modeling, nonlinear analysis and control methods for flow control problemsKasnakoglu, Cosku 10 December 2007 (has links)
No description available.
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Development of reduced-order models and strategies for feedback control of high-speed axisymmetric jetsSinha, Aniruddha 26 September 2011 (has links)
No description available.
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Reduced-Order Modeling of Complex Engineering and Geophysical Flows: Analysis and ComputationsWang, Zhu 14 May 2012 (has links)
Reduced-order models are frequently used in the simulation of complex flows to overcome the high computational cost of direct numerical simulations, especially for three-dimensional nonlinear problems.
Proper orthogonal decomposition, as one of the most commonly used tools to generate reduced-order models, has been utilized in many engineering and scientific applications.
Its original promise of computationally efficient, yet accurate approximation of coherent structures in high Reynolds number turbulent flows, however, still remains to be fulfilled. To balance the low computational cost required by reduced-order modeling and the complexity of the targeted flows, appropriate closure modeling strategies need to be employed.
In this dissertation, we put forth two new closure models for the proper orthogonal decomposition reduced-order modeling of structurally dominated turbulent flows: the dynamic subgrid-scale model and the variational multiscale model.
These models, which are considered state-of-the-art in large eddy simulation, are carefully derived and numerically investigated.
Since modern closure models for turbulent flows generally have non-polynomial nonlinearities, their efficient numerical discretization within a proper orthogonal decomposition framework is challenging. This dissertation proposes a two-level method for an efficient and accurate numerical discretization of general nonlinear proper orthogonal decomposition closure models. This method computes the nonlinear terms of the reduced-order model on a coarse mesh. Compared with a brute force computational approach in which the nonlinear terms are evaluated on the fine mesh at each time step, the two-level method attains the same level of accuracy while dramatically reducing the computational cost. We numerically illustrate these improvements in the two-level method by using it in three settings: the one-dimensional Burgers equation with a small diffusion parameter, a two-dimensional flow past a cylinder at Reynolds number Re = 200, and a three-dimensional flow past a cylinder at Reynolds number Re = 1000.
With the help of the two-level algorithm, the new nonlinear proper orthogonal decomposition closure models (i.e., the dynamic subgrid-scale model and the variational multiscale model), together with the mixing length and the Smagorinsky closure models, are tested in the numerical simulation of a three-dimensional turbulent flow past a cylinder at Re = 1000. Five criteria are used to judge the performance of the proper orthogonal decomposition reduced-order models: the kinetic energy spectrum, the mean velocity, the Reynolds stresses, the root mean square values of the velocity fluctuations, and the time evolution of the proper orthogonal decomposition basis coefficients. All the numerical results are benchmarked against a direct numerical simulation. Based on these numerical results, we conclude that the dynamic subgrid-scale and the variational multiscale models are the most accurate.
We present a rigorous numerical analysis for the discretization of the new models. As a first step, we derive an error estimate for the time discretization of the Smagorinsky proper orthogonal decomposition reduced-order model for the Burgers equation with a small diffusion parameter.
The theoretical analysis is numerically verified by two tests on problems displaying shock-like phenomena.
We then present a thorough numerical analysis for the finite element discretization of the variational multiscale proper orthogonal decomposition reduced-order model for convection-dominated convection-diffusion-reaction equations. Numerical tests show the increased numerical accuracy over the standard reduced-order model and illustrate the theoretical convergence rates.
We also discuss the use of the new reduced-order models in realistic applications such as airflow simulation in energy efficient building design and control problems as well as numerical simulation of large-scale ocean motions in climate modeling. Several research directions that we plan to pursue in the future are outlined. / Ph. D.
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