ALBERT EINSTEIN

ALBERT EINSTEIN

Muito obrigado pela sua doação. Sua generosidade significa tudo para mim faça uma doação nobre

Muito obrigado pela sua doação. Sua generosidade significa tudo para mim faça uma doação nobre
JUNTOS PODEMOS FAZER UMA NOVA GERAÇÃO DE JOVENS CAMPEÔES OLIMPICOS DE MATEMATICA

"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS DO MAL"

Matematicas preuniversitarias,fisica preuniversitaria,algebra,geometria,trigonometria
mathematics,physics,geometry,Математика,College,Pre-College,vestibular universidades,olimpiadas de matematicas,Mathematical Olympiad,Algebra Problems,Geometry Problems,High School Geometry,Trigonometry Problems,Descriptive Geometry,Problems In Calculus Of One Variable,ECUACIONES DIFERENCIALES,problemas de fisica,Problems On Physics,Linear Algebra,Problems In Elementary Mathematics,Inequalities,Mathematics for high school students,EXAMENS DE ADMISION ALGEBRA.
   

https://picasion.com/
https://picasion.com/

BLOG DO ENG. ARMANDO CAVERO MIRANDA -BRASIL


segunda-feira, 27 de janeiro de 2025

ESTUDO DE CONVERSORES ESTÁTICOS CA-CA MONOFÁSICOS ETRIFÁSICOS BASEADOS NO PRINCÍPIO DO CAPACITOR CHAVEADO Mauricio Dalla Vecchia, Telles Brunelli Lazzarin, Ivo BarbiUniversidade Federal de Santa Catarina – UFSC, Florianópolis – SC, Brasil


 

ESTUDO DE CONVERSORES ESTÁTICOS CA-CA MONOFÁSICOS ETRIFÁSICOS BASEADOS NO PRINCÍPIO DO CAPACITOR CHAVEADO Mauricio Dalla Vecchia, Telles Brunelli Lazzarin, Ivo BarbiUniversidade Federal de Santa Catarina – UFSC, Florianópolis – SC, Brasil e-mail: m.dallavecchia90@gmail.com, telles@inep.ufsc.com, ivobarbi@inep.ufsc.br 

 Resumo – Este artigo apresenta uma célula básica bidirecional a capacitor chaveado para a conversão direta CA-CA. A partir desta célula são discutidas duas topologias CA-CA, uma monofásica e outra trifásica, e proposta uma terceira topologia CA-CA trifásica com número de interruptores reduzido, denominada deltaaberto. Essas topologias utilizam apenas capacitores e interruptores no estágio de potência, apresentam ganho fixo, operam em malha aberta, com valores constantes de razão cíclica e frequência, apresentam alta eficiência e elevada densidade de potência, típicas características de capacitores chaveados. A principal vantagem das topologias abordadas é a não utilização de elementos indutivos no circuito de potência, o que reduz significativamente o volume e peso da estrutura. Os conversores são adequados para a implementação de transformadores eletrônicos e possuem potencial para substituir o autotransformador em aplicações residenciais, comerciais e industriais. Estudo, análise e comprovação experimental são apresentados para os seguintes conversores: monofásico de 1 kW, trifásico de 6 kW e trifásico com conexão delta-aberto de 3,5 kW, todos para 220 V/110 V. As topologias operam com uma frequência de comutação de 100 kHz. Resultados experimentais expressivos, como eficiência em torno de 93 % em plena carga, são apresentados e comprovam o potencial de aplicação das topologias.

domingo, 26 de janeiro de 2025

MAGNETIC MATERIALS. NEW TECNOLOGIES Abstracts of 8 th Baikal International Conference Irkutsk, Irkutsk region, Russia August 24 th – 28 th 2018-НОВЫЕ ТЕХНОЛОГИИ Тезисы докладов VIII Байкальской Международной конференции г. Иркутск, Иркутская область, Российская Федерация 24 – 28 августа 2018


 

DOWNLOAD LINK: https://www.mediafire.com/file/ja9961cr5l234w6/Тезисы+BICMM-2018-MAGNETIC+MATERIALS..pdf/file

Quantum physics of solids-Квантовая физика твердого тела-Authors: S.V. Vonsovsky, M.I. Katsnelson


 Quantum physics of solids-Квантовая физика твердого тела-Authors: S.V. Vonsovsky, M.I. Katsnelson Authors: S.V. Vonsovsky, M.I. Katsnelson

 Information about the publisher: Moscow: Chief editorial board of physical and mathematical literature of the Nauka publishing house, 1983. – 336 p., In addition to the traditional material devoted to quantum solid-state physics, the book covers such issues as neutron scattering, the Mössbauer effect, metal-insulator transitions, plasma phenomena and other multielectron effects, and pseudopotential. Particular attention is paid to general issues of solid-state theory (the Schrödinger equation with a periodic potential, the self-consistent field approximation, the limits of applicability of band theory, and a number of others). The presentation assumes knowledge of only the basics of quantum and statistical mechanics and does not use complex mathematical apparatus.

quinta-feira, 23 de janeiro de 2025

Higher Mathematics Exercises by Y. Bougrov ; S. Nikolski-Exercices De Mathématiques Supérieures by Y. Bougrov; S. Nikolski


 


Exercices De Mathématiques Supérieures by Y. Bougrov; S. Nikolski
This Collection of Problems concerns our Higher Mathematics Course published in French in two volumes: 111 “Higher Mathematics Course, Volume I: Differential and integral calculus. Elements of linear algebra and analytical geometry”. Mir Editions, Moscow, 1983; [21 “Course in higher mathematics, Volume II: Differential equations. Multiple integrals. Series. Functions of a complex variable. Mir Editions, Moscow, 1983. Each chapter of the collection has been supplemented by problems and exercises of major difficulty contained in the Appendix.

VIEW BOOK IN WEB (FRENCH):

VIEW BOOK IN WEB (ENGLISH)

quarta-feira, 22 de janeiro de 2025

Limits And Continuity ( Pocket Mathematical Library) by P. P. Korovkin


 
Limits And Continuity ( Pocket Mathematical Library) by P. P. Korovkin

The present volume in The Pocket Mathematical Library stems in large part from Chapters 1-4 of P. P. Korovkin’s Mathema­tical Analysis, Moscow (1963). The material has been heavily rewritten and supplemented by 21 problem sets, one after each section. The result is a succinct but remarkably complete introduction to the theory o f limits and continuity. The book may also be thought of as a “precalculus” text in that it deals with those properties of functions which can be successfully discussed short of introducing the notion of a derivative.

VIEW FULL TEXT:

https://archive.org/details/korovkin-limits-and-continuity-pocket-mathematical-library/page/n1/mode/2up


segunda-feira, 20 de janeiro de 2025

COLLECTION OF OLYMPIAD PROBLEMS IN HIGHER MATHEMATICS-V. M. Shakhmatov, A. L. Lisok,T. C. Tarbokova-Publishing houseTomsk Polytechnic University-2010


 

Collection of Olympiad problems in higher mathematics: textbook / V. M. Shakhmatov, A. L. Lisok, T. V. Tarbokova - Tomsk: Publishing HouseTomsk Polytechnic University, 2009. – 144 p

.The basis of the textbook is problems (there are more than eight hundred of them) - from all sections of mathematics, offered to first- and senior-year students at intra-university (TPU, TSPU), regional (Tomsk) and regional and all-Russian rounds of the Olympiad in mathematics, as a subject and as a specialty over the past ten to fifteen years. In addition to problems for independent solution, the collection includes more than fifty problems with solutions or instructions. This manual can be recommended for students to prepare for mathematical Olympiads; teachers - to work with students as part of extracurricular activities. Some problems can be offered as individual tasks in mathematics, and can also be useful when writing essays.

VIEW FULL TEXT: 

LINK1 :

https://portal.tpu.ru/SHARED/s/SHAKH/Olimp/%D0%A1%D0%B1%D0%BE%D1%80%D0%BD%D0%B8%D0%BA%201.pdf

LINK2https://www.mediafire.com/file/shfafu13l83hkxj/Сборник+1.pdf/file



domingo, 5 de janeiro de 2025