317 research outputs found
Problemas de valor inicial e de contorno para equação generalizada de Zakharov-Kuznetsov
No full textOrientador: Prof. Dr. Gleb Germanovitch DoroninTese (doutorado em Matemática)--Universidade Estadual de Maringá, Dep. de Matemática, Programa de Pós-Graduação em Matemática, Área de Concentração: Análise, 2021Este trabalho trata da equação generalizada de Zakharov-Kuznetsov. Estudamos três situações: equação subcrítica, critica e supercrítica. Estão apresentados os resultados sobre existência, unicidade e comportamento assintótico.This work deals with the generalized Zakharov-Kuznetsov equation. We study three situ- ations: subcritical, critical and supercritical cases. The results on existence, uniqueness and asymptotic behavior are presented
Augmenting human intelligence via externalized knowledge representation and intelligent information retrieval
No full textThesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student submitted PDF version of thesis.Includes bibliographical references (p. 77-78).With a representation of a user's mental model in hand, a computer system can continuously query against a knowledge base of past work sessions or information on the Web and generate a set of recommended resources for the user to consider. In this thesis, I have developed an interface and a representation that allows a computer system to build a model of a user's intent and generate recommendations. I have designed, prototyped, and deployed the Mental Model Browser, a web application that infers a user's intent during a Web browsing session and provides recommendations for related URLs. The application includes a web browser extension for recording the URLs a user visits and a feedback interface that hosts a dialogue between the computer system and the user. The Mental Model Browser identifies important concepts in the session by leveraging an API provided by the Delicious web bookmarking service, a rich data corpus of crowd-sourced web page tags. The identified concepts are presented to the user to confirm their validity and trigger a query for recommended web pages. I conducted a pilot study with 22 active participants who engaged in 56 web browsing sessions. The results of the study show that users were able to readily adapt to the workflow of the application. Users reported quickly discovering how to help shape the system's model of the session through the use of tags. Several users reported receiving valuable recommendations that they did not find through search alone. Finally, I lay out visions for near-future technologies such as multi-modal knowledge capture and activation, as well as knowledge-based social networks that are enabled by the concepts I have explored in this thesis.by Gleb Kuznetsov.M.Eng
Academicianul Gleb Drăgan - savant de talie internaţională
No full textAcademicianul Gleb Drăgan a fost fondatorul Școlii de Tehnica Tensiunilor Înalte și al Laboratorului de Tehnica Tensiunilor Înalte din România. El este autorul a 33 de cărţi și coordonatorul Tratatului de Tensiuni Înalte în trei volume. El a editat 32 de dictionare explicative de terminilogie tehnică, precum și sute de studii ştiinţifice şi tehnice, articole prezentate la congrese şi conferinţe în România sau în afara ei, în special, în domeniul energetic, al descărcărilor electrice coronă, comutărilor de supratensiuni, supratensiuni atmosferice etc. De asemenea, a editat două monografii în care este descrisă tragedia familiilor basarabene deportate. Profesorul Gleb Drăgan a fost membru al Academiei Române şi al Academiei de Ştiinţe Tehnice din România, Membru Onorific al Academiei de Ştiinţe a Moldovei, Doctor Honoris Causa al Universităţii Tehnice a Moldovei şi al Universităţii Tehnice din Oradea, membru şi membru onorific în diferite organizaţii nonguvernamentale naţionale şi internaţionale.Academician Gleb Drăgan was the founder of the High Voltage Engineering School and the High Voltage Engineering Laboratory in Romania. He is the author of 33 technical books and coordinator of the High Voltage Treaty in three volumes. He edited 32 explanatory dictionaries of technical terminology, hundreds of technical and scientific studies and articles presented at congresses and conferences in the country and abroad, mainly dealing with electric power field, corona discharges, switching surges, atmospheric switching over voltages etc. He is also the author of two chronicles describing the tragedies of the deported Besssarabian families. Professor Gleb Dragan was member of the Romanian Academy and member of the Academy of Technical Sciences of Romania, Honorary Member of the Academy of Sciences of Moldova, Doctor Honoris Causa of the Technical University of Moldova and member of the Technical University of Oradea, member and honorary member in several prominent national and international non-governmental organizations
Znaczenie prochnicy dla zyznosci gleb
No full textPublikacja zawiera krótki przegląd najważniejszych prac poświęconych materii organicznej gleb, procesom humifikacji oraz wpływowi nawożenia na próchnicę; głównie prac stanowiących 40-letni dorobek naukowy Autora.This paper is a short review of some most important works concerning organic matter in soil and its transformation to humus.but mainly it is the review of the projects which the Author has been doing during forty years of his work on this subject
Prawna ochrona zdolności produkcyjnej gleb – zagadnienia wybrane
No full textThe subject of the article is the legal aspects of protecting the productive capacity of soils. The study is of a scientific and research nature. The author starts from the statement that soils perform, in particular, environmental, economic, social and cultural functions, while for the protection of the characteristics that determine the possibility of using soils in food production, production functions, combined with the production function of agriculture, are important. Thus, the purpose of the analysis is to determine whether current Polish legislation sufficiently takes into account the need to protect the productive capacity of soils, understood as the possibility of sustainable use of these resources for food production. Consideration of this issue leads to the conclusion that the current legislation does not sufficiently take into account the need to protect the productive functions of soils, while a certain degree of protection is assumed by draft EU legislation on, among other things, soil monitoring granting Member States a significant role in tracking, assessing and managing the condition of soils.Przedmiotem badania w artykule są prawne aspekty ochrony zdolności produkcyjnej gleb. Opracowanie ma charakter naukowo-badawczy. Autorka wychodzi od stwierdzenia, że gleby pełnią zwłaszcza funkcje środowiskowe, gospodarcze, społeczne i kulturowe, a z punktu widzenia ochrony cech warunkujących możliwość wykorzystania gleb w produkcji żywności ważna są funkcje produkcyjne, łączące się z funkcją produkcyjną rolnictwa. Celem analizy jest ustalenie, czy obowiązujące polskie prawodawstwo dostatecznie uwzględnia potrzebę ochrony zdolności produkcyjnej gleb, rozumianej jako możliwość zrównoważonego wykorzystywania tych zasobów do produkcji żywności. Rozważania nad tym zagadnieniem prowadzą do wniosku, że tak nie jest, natomiast pewien zakres ochrony zakładają projekty unijnych aktów prawnych, m.in. w sprawie monitorowania gleb, przyznający państwom członkowskim znaczącą rolę w śledzeniu i ocenie stanu gleb oraz zarządzaniu nimi
The Medieval Russian Library (II) : Tales about Boris and Gleb
No full textThe author in this bulletine provides translations of three literary works supposed to have been created from the latter half of 11th century to the first half of 12th, which concerned the murders of the princes of Rus’(the old name of Russia) Boris and Greb. The names of the works are “The Tale and Passion and Panegyrcis to the Holy Matyrs Boris and Gleb”, “The Tales of the Miracles of the Holy Passion bearers Roman and David” and “Lesson concerning the Life and Assassination of the Blessed Passionbearers Boris and Gleb”. The murders occurred in 1015, when their father Vladimir died. Vladimir had converted Rus’into Christianity in 988. After his death the struggle for the kievan grand princedom started. The senioir son, so called “cursed” Sviatopolk, seized Kiev by force. But Sviatopolk, who was not satisfied by the occupation of the kievan princedom, undertook the erasure of his rivals, that is, his younger brothers Boris and Gleb. Boris and Gleb, who knew the malice of Sviatopolk, did not make any resistance against their elder brother and were killed. Because of their nonresistance and the respect for the family seniority Boris and Gleb were later kanonized as the first Christian saints in Rus’. The above-metioned three tales deal with this tragic political affair in the dawn of the Russian Orthodox Christianity.departmental bulletin pape
Saints Boris and Gleb and the Holy Innocents: Between Linguistics and Literary Studies
No full textThe author examines the use of the rare OSC lexeme ‘syrorězanie’ in the anonymous Narration on Boris and Gleb in order to determine its linguistic or literary status: lexical borrowing vs part of a literary quotation. The definition of this status is directly related to the possibility to admit its immanence to the Narration in the first case or, alternatively, its secondary nature in it. Merely in the latter case can the lexeme serve as a sign of intertextual connections that can help clarify the general concept of the Narration on Boris and Gleb. This question arose in connection with A. M. Ranchin’s critical remarks on the idea that the hagiographic image of the Holy Innocents served as the conceptual basis for the Kievan cult of Sts Boris and Gleb. These criticisms are discussed in order to verify the
Predicting forex trading signals using methods of image recognition.
No full textAlgoritmické obchodování je od svého počátku pro mnoho výzkumníků skutečně atraktivní oblastí, která slibuje okamžitý zisk za jakoukoli vynalézavost, kterou do něj vloží. Velmi inspirováni úspěchem rozpoznávání obrazu a hlubokého učení v posledních letech jsme se pokusili zmíněný úspěch využít na Forexu. Připravili jsme přehled současných technik rozpoznávání obrazu a aplikovali je na předpovídání signálů na Forexu. Stejně jako lidé mohou predikovat nadcházející trendy zkoumáním grafů; my jsme natrénovali umělou neuronovou síť, která dokáže předpovídat budoucí cenové trendy z grafů extrapolací vytvořených pomocí Rychlé Fourierovy transformace. Výsledný model dosahuje na testovacích datech výkonnosti 63%.Algorithmic trading, since its inception, has been a really attractive field for lots of researchers, promising an immediate return for any ingenuity put into it. Greatly inspired by the success of image recognition and deep learning in recent years, we tried to utilize said success in Forex. We prepared a survey of current image recognition techniques and applied them to predict Forex signals. Same as people can conclude upcoming trends by examining graphs; we trained an artificial neural network that can predict future price trends from graphs of extrapolations created via Fast Fourier transform. The final model achieves a performance of 63% on test dat
Przydatność metody woltamperometrii stałoprądowej do oceny czystości gleb
No full textThis paper presents a voltammetric analysis of soil. It shows that the voltammetry is a useful method for the assessment of soil contaminated with heavy metal ions. There are two major problems with voltammetry analysis: the diffusion coefficient and the measurement system. The paper contains a short literature study of mathematical equations and a study of differences between soil and water measurements. Suggestions of the solution of these problems and the results obtained by the author are also presented.Artykuł przedstawia możliwości zastosowania metody woltampero-metrycznej do badania stopnia zanieczyszczenia gleb metalami ciężkimi. Wstępne, wykonane przez autorkę pomiary, pozwalają stwierdzić, że metody elektrochemiczne mogą być użyteczne do oceny stopnia zanieczyszczenia gleb metalami ciężkimi. Metody elektrochemiczne są dobrze poznane i powszechnie wykorzystywane w pomiarach roztworów wodnych. Różnice między pomiarami w roztworach wodnych a pozostałych wydają się być na tyle znaczne, że mogą wykluczać metody elektrochemiczne jako metody pomiarowe użyteczne dla pomiarów glebowych. Ważne jest rozwiązanie problemów wynikających z tych różnic. Główne problemy uniemożliwiające użycie metod elektro-chemicznych najprawdopodobniej wynikają z różnic w wartości współczynnika dyfuzji i czułości układu mierzącego (związaną z konstrukcją samego układu) dla pomiarów glebowych oraz w wodzie. W niniejszym artykule zostało przedstawione zarówno krótkie studium literaturowe, propozycja rozwiązania problemów występujących podczas pomiarów, jak i własne wyniki badań autorki
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