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Book
Introduzione ai sistemi dinamici - Volume 2 : Meccanica lagrangiana e hamiltoniana
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ISBN: 8847040140 8847040132 Year: 2022 Publisher: Milano : Springer Milan : Imprint: Springer,

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Abstract

Il presente volume costituisce un trattato di meccanica lagrangiana e hamiltoniana, e completa la rassegna sui sistemi dinamici iniziata nel primo, di cui è la naturale continuazione. Il testo è rivolto a studenti di un corso di laurea triennale in matematica o in fisica, ed è al contempo di potenziale interesse per studenti di un corso di laurea magistrale o di dottorato, nonché per ricercatori intenzionati a lavorare nel campo. Oltre agli argomenti di base, sono infatti affrontati anche argomenti avanzati, per i quali sono comunque forniti gli strumenti matematici utilizzati in modo da rendere la trattazione autocontenuta e accessibile ai meno esperti. I temi discussi sono: formalismo lagrangiano, principi variazionali, metodo di Routh e teorema di Noether, teoria delle piccole oscillazioni, moto dei corpi rigidi pesanti, formalismo hamiltoniano, trasformazioni canoniche, metodo di Hamilton-Jacobi, teoria delle perturbazioni, sistemi quasi-integrabili, studio delle serie perturbative e teorema KAM. Il testo è corredato di un ampio numero di esempi illustrativi, di applicazioni e, alla fine di ogni capitolo, di un'ampia scelta di esercizi, per la maggior parte dei quali è fornita la soluzione. .


Book
Differential equations and applications : ICABS 2019, Tiruchirappalli, India, November 19-21
Author:
ISBN: 9811675457 9811675465 Year: 2022 Publisher: Singapore : Springer,


Book
The Statistical Foundations of Entropy
Authors: ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

In the last two decades, the understanding of complex dynamical systems underwent important conceptual shifts. The catalyst was the infusion of new ideas from the theory of critical phenomena (scaling laws, renormalization group, etc.), (multi)fractals and trees, random matrix theory, network theory, and non-Shannonian information theory. The usual Boltzmann–Gibbs statistics were proven to be grossly inadequate in this context. While successful in describing stationary systems characterized by ergodicity or metric transitivity, Boltzmann–Gibbs statistics fail to reproduce the complex statistical behavior of many real-world systems in biology, astrophysics, geology, and the economic and social sciences.The aim of this Special Issue was to extend the state of the art by original contributions that could contribute to an ongoing discussion on the statistical foundations of entropy, with a particular emphasis on non-conventional entropies that go significantly beyond Boltzmann, Gibbs, and Shannon paradigms. The accepted contributions addressed various aspects including information theoretic, thermodynamic and quantum aspects of complex systems and found several important applications of generalized entropies in various systems.


Book
Multibody Systems with Flexible Elements
Authors: --- ---
ISBN: 303655257X 3036552588 Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Multibody systems with flexible elements represent mechanical systems composed of many elastic (and rigid) interconnected bodies meeting a functional, technical, or biological assembly. The displacement of each or some of the elements of the system is generally large and cannot be neglected in mechanical modeling. The study of these multibody systems covers many industrial fields, but also has applications in medicine, sports, and art. The systematic treatment of the dynamic behavior of interconnected bodies has led to an important number of formalisms for multibody systems within mechanics. At present, this formalism is used in large engineering fields, especially robotics and vehicle dynamics. The formalism of multibody systems offers a means of algorithmic analysis, assisted by computers, and a means of simulating and optimizing an arbitrary movement of a possibly high number of elastic bodies in the connection. The domain where researchers apply these methods are robotics, simulations of the dynamics of vehicles, biomechanics, aerospace engineering (helicopters and the behavior of cars in a gravitational field), internal combustion engines, gearboxes, transmissions, mechanisms, the cellulose industry, simulation of particle behavior (granulated particles and molecules), dynamic simulation, military applications, computer games, medicine, and rehabilitation.

Keywords

Technology: general issues --- History of engineering & technology --- symmetry --- asymmetry --- measure of skewness --- decile --- Monte Carlo algorithm --- Gibbs–Appell --- energy of accelerations --- finite element --- nonlinear system --- elastic elements --- analytical dynamics --- robotics --- Hilbert’s inequality --- Fubini theorem --- Fenchel-Legendre transform --- time scale --- fractional derivative --- skin tissues --- thermal damages --- Laplace transforms --- Kane’s equations --- planar mechanism --- Lagrange’s equations --- dynamics --- finite element method (FEM) --- multibody system (MBS) --- wind water pump --- strands wire rope --- experimental transitory vibrating regime --- stiffness --- damping --- joint time-frequency analysis --- Prony method --- matrix pencil method --- multibody --- propulsion drive --- linear motion --- eccentric trajectory --- reusable launch vehicles --- soft landing --- magnetorheological fluid --- numerical simulation --- multibody systems with flexible elements --- elastic bonds --- vibrations --- initial matrix --- stiffness matrix --- stability --- laser --- nuclear installation --- insulation --- Extreme Light Infrastructure --- gamma ray --- flexible coupling --- bolt --- non-metallic element --- finite element method --- elastic characteristic --- Light Sport Aircraft --- conceptual aircraft design --- wing --- flap --- aileron --- weight estimation --- symmetric profile --- sustainability --- mosquito borne diseases --- Aedes Aegypti --- Wolbachia invasion --- impulsive control --- time scales --- Noether theory --- conserved quantity --- elastic coupling --- non-metallic elements --- dynamic rigidity --- non-collinearly shafts --- n/a --- Gibbs-Appell --- Hilbert's inequality --- Kane's equations --- Lagrange's equations


Book
Modern Problems of Mathematical Physics and Their Applications
Authors: ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

There are many applications of mathematical physics in several fields of basic science and engineering. Thus, we have tried to provide the Special Issue “Modern Problems of Mathematical Physics and Their Applications” to cover the new advances of mathematical physics and its applications. In this Special Issue, we have focused on some important and challenging topics, such as integral equations, ill-posed problems, ordinary differential equations, partial differential equations, system of equations, fractional problems, linear and nonlinear problems, fuzzy problems, numerical methods, analytical methods, semi-analytical methods, convergence analysis, error analysis and mathematical models. In response to our invitation, we received 31 papers from more than 17 countries (Russia, Uzbekistan, China, USA, Kuwait, Bosnia and Herzegovina, Thailand, Pakistan, Turkey, Nigeria, Jordan, Romania, India, Iran, Argentina, Israel, Canada, etc.), of which 19 were published and 12 rejected.

Keywords

cauchy problem --- regularization --- factorization --- regular solution --- fundamental solution --- road section --- IMF SWARA --- traffic safety --- fuzzy MARCOS --- DEA --- ordinary differential equations --- analytical methods --- mathematical models --- Riccati equation --- radial Schrödinger equation --- transformations --- hyper-singular integrals --- Navier–Stokes problem --- product user experience --- enterprise network public opinion --- identification of high-risk users --- random forest algorithm --- user portrait --- controlled second-order Lagrangian --- Euler–Lagrange equations --- isoperimetric constraints --- curvilinear integral --- differential 1-form --- partition functions --- analytical extensions --- guelfand’s and gradshteyn’s --- classical gravity --- internal waves in rotating ocean --- fractional derivative --- q-Homotopy analysis transform technique --- fixed point theorem --- minimal sensitivity --- optimization --- power transform --- critical index --- secant method --- generalized secant method --- complex roots --- cressman method --- EICM --- ENSO --- SSTA --- immune system --- virus-infected cell --- effector cell --- autoimmune disease --- time-delay virus-immune model --- differential equations --- differential operators --- non-local boundary value problems --- general conditions --- integral conditions --- multipoint conditions --- composition of operators --- pseudo-differential equation --- conjugation problem --- wave factorization --- solvability condition --- measure of noncompactness --- random effect --- random operator --- Mönch’s fixed point theorem --- multi-term fractional differential equation --- Carathéodory condition --- resolvent family theory --- multi-dimensional public opinion --- topic derivation --- complex network dynamics model --- online comments --- hot events --- fluid --- flows --- dynamic --- structure --- axiomatics --- fundamental equations --- dissipation --- complete solution --- ligaments --- waves --- vortices --- plate --- wake --- drop --- impact --- boundary element method --- barrier options --- multi-asset options --- basket options --- spread options --- thrid-order differential equations --- delay --- oscillation criteria --- n/a --- radial Schrödinger equation --- Navier-Stokes problem --- Euler-Lagrange equations --- guelfand's and gradshteyn's --- Mönch's fixed point theorem --- Carathéodory condition --- third-order differential equations


Book
Mathematical Modeling and Simulation in Mechanics and Dynamic Systems
Authors: ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

The present book contains the 16 papers accepted and published in the Special Issue “Mathematical Modeling and Simulation in Mechanics and Dynamic Systems” of the MDPI “Mathematics” journal, which cover a wide range of topics connected to the theory and applications of Modeling and Simulation of Dynamic Systems in different field. These topics include, among others, methods to model and simulate mechanical system in real engineering. It is hopped that the book will find interest and be useful for those working in the area of Modeling and Simulation of the Dynamic Systems, as well as for those with the proper mathematical background and willing to become familiar with recent advances in Dynamic Systems, which has nowadays entered almost all sectors of human life and activity.

Keywords

T-stress --- X-FEM --- notch --- pipe --- stress difference method (SDM) --- system of transcendental equation --- computational solutions --- code-based modelling approach --- numerical analysis --- Sine-Gordon equations --- photovoltaics --- thermophotovoltaics --- solar energy --- polymer CNTs systems --- interphase section --- percolation onset --- mechanics --- high temperature proton exchange membrane fuel cell --- exergy analysis --- ecological analysis --- ecological coefficient of performance --- SARS-CoV-2 --- COVID-19 --- SEIRD (Susceptible, Exposed, Infected and Recovered and Death) --- SDL --- Catalonia --- nanowire cantilever --- stochastic model --- double Lorentzian spectrum --- HT-PEMFC --- irreversibility --- finite time thermodynamic optimization --- power density --- thermodynamic efficiency --- geometric analogy --- similarity theory --- dimensional analysis --- model law --- heat transfer --- straight bar --- Deep Learning (DL) --- Computational Fluid Dynamics (CFD) --- Artificial Neural Network (ANN) --- Convolutional Neural Network (CNN) --- turbulent flow --- machine learning --- deep learning --- artificial neural network --- ANN --- PEM fuel cell --- modeling --- control --- differentiability --- fractal hydrodynamic regimes --- fractal Schrödinger regimes --- fractal soliton --- fractal kink --- “holographic implementations” --- cubics --- apolar transport --- harmonic mapping principle --- period doubling scenario --- state probability functions --- partial aging in standby --- Monte Carlo simulation --- qualitative and quantitative verification of simulation model --- Lagrange–d’Alembert principle --- non-conservative dynamical system --- Euler–Poincaré equation --- helicopter model --- Lie group --- extended iso-geometric analysis --- extended finite element method --- crack --- pipeline --- ABAQUS --- harmonic mapping --- complex system dynamics --- SL (2R) group --- hidden symmetries --- computer simulations --- actual systems --- transfer learning --- autonomous feature extraction --- n/a --- fractal Schrödinger regimes --- "holographic implementations" --- Lagrange-d'Alembert principle --- Euler-Poincaré equation

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