"The principle of divergence is simplicity itself: the more the coinhabitants of an area differ from each other in their ecological requirements, the less they will compete with each other; therefore natural sele...
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ISBN:
(纸本)9781450392686
"The principle of divergence is simplicity itself: the more the coinhabitants of an area differ from each other in their ecological requirements, the less they will compete with each other; therefore natural selection will tend to favor any variation toward greater divergence" (Mayr, 1992)
In this paper, we show the application of the Quantum Metropolis Sampling (QMS) algorithm to a toy gauge theory with discrete non-Abelian gauge group D4 in (2+1)-dimensions, discussing in general how some components o...
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In this paper, I formalize intelligence measurement in games by introducing mechanisms that assign a real number—interpreted as an intelligence score—to each player in a game. This score quantifies the ex-post strat...
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This textbook is an introduction to economic networks, intended for students and researchers in the fields of economics and applied mathematics. The textbook emphasizes quantitative modeling, with the main underlying ...
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computational modeling and simulation helps in reducing the overall design cycle time during any process as well as product development. Microwave welding has transpired as a modernistic technique owing to its momento...
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computational modeling and simulation helps in reducing the overall design cycle time during any process as well as product development. Microwave welding has transpired as a modernistic technique owing to its momentous advantage of uniform volumetric heating in addition to being financially economical, clean, repeatable, reproducible, time-efficient, and green. Contrary to the myth that metallic materials cannot be processed by microwave energy;the focus of this review paper is to deliberate the computational aspects related to the microwave interaction with metallic materials (both powder as well as bulk form) and to discuss in detail the microscopic mechanism that influences the electromagnetic and thermal properties of the metallic materials. The literature pertaining to microwave hybrid heating and the computational modeling and simulation aspect of microwave processing of metallic materials has been further discussed for highlighting its specific benefits. Opportunity for future developments has also been acknowledged concerning the microwave processing of materials.
The Kerr/CFT correspondence has been established to explore the quantum theory of gravity in the near-horizon geometry of an extreme Kerr black holes. The quantum gravitational corrections on the near-horizon region m...
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The Kerr/CFT correspondence has been established to explore the quantum theory of gravity in the near-horizon geometry of an extreme Kerr black holes. The quantum gravitational corrections on the near-horizon region may manifest in form of a partially reflective membrane that replace the horizon. In such modification, the black holes now can be seen as a horizonless exotic compact object (ECO). In this paper, we consider the properties of Kerr-like ECOs in near-extremal condition using Kerr/CFT correspondence. We study the quasinormal modes and absorption cross-section in that background and compare these by using CFT dual computation. The corresponding dual CFT one needs to incorporate finite size/finite N effects in the dual CFT terminology. We also extend the dual CFT analysis for higher spin perturbations such as photon and graviton. We find consistency between properties of the ECOs from gravity sides and from CFT sides. The quasinormal mode spectrum is in line with non-extreme case, where the differences are in the length of the circle, on which the dual CFT lives, and phase shift of the incoming perturbation. The absorption cross-section has oscillatory feature that start to disappear near extremal limit. The particle spin determines the phase shift and conformal weight. We also obtain that the echo time-delay depends on the position of the membrane and extremality of the ECOs.
This article reported an extensive review of computational modelling and analysis on damping and vibrational behaviors of viscoelastic structures, including experimental techniques. viscoelastic materials have emerged...
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This article reported an extensive review of computational modelling and analysis on damping and vibrational behaviors of viscoelastic structures, including experimental techniques. viscoelastic materials have emerged as an effective technology for enhancing damping characteristics in composite structures because of their ability to damp vibration and the ability to conserve the geometry of the material after deformation. In structural design viscoelastic material is never employed alone, it is always adhered to the thin-walled structure to form a damping layer of different structural configurations such as sandwich structure configurations and reinforced configurations. It is worth mentioning that viscoelastic materials are quite frequency-dependent meaning that the vibrational properties keep varying with the excitation frequency, accordingly, yielding complex natural frequencies of vibration. This paper provides a primary discussion on the basic forming principles of linear viscoelastic material providing comparisons of different viscoelastic material mathematical models, and applications of viscoelastic material including their effects on composite structure damping and vibrational behaviors. Moreover, different computational methods for dynamic behaviors of viscoelastic sandwich structures including analytical method, finite element method, and mixed method were assessed to provide insights into the limitations of each approach. The drawbacks of each calculation theory for various traditional and recent configurations are systematically presented in engineering structures containing viscoelastic followed by a detailed description and comparison of different modeling methods, their applicability, and their respective comparisons.
Simulation models are used to emulate real-world phenomena, and errors are inevitable in the numerical computation process. Owing to that, simulation models need to be verified and validated to ensure the models and t...
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Simulation models are used to emulate real-world phenomena, and errors are inevitable in the numerical computation process. Owing to that, simulation models need to be verified and validated to ensure the models and their implementations are correct. In this paper, V&V has been done for the micro3d discrete dislocation dynamics (DDD) model by comparing simulation results with corresponding theory, including any analytical solutions, other numerical solutions and experimental data. DDD simulations are a powerful simulation methodology that can help researchers better understand the plastic behavior of crystalline materials. In this study, parametric analyses for DDD simulations parameters have been performed. In addition, simulation results are verified and validated.
Consider orbits O(z,kappa) of the fractal iterator f(kappa)(z) := z(2) + kappa, kappa is an element of C, that start at initial points z is an element of K-kappa((m)) subset of C, where C is the set of all rational co...
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Consider orbits O(z,kappa) of the fractal iterator f(kappa)(z) := z(2) + kappa, kappa is an element of C, that start at initial points z is an element of K-kappa((m)) subset of C, where C is the set of all rational complex numbers (their real and imaginary parts are rational) and K-kappa(m) consists of all such z whose complexity does not exceed some complexity parameter value m (the complexity of z is defined as the number of bits that suffice to describe the real and imaginary parts of z in lowest form). The set K-kappa((m)) is a bounded-complexity approximation of the filled Julia set K-kappa. We present a new perspective on fractals based on an analogy with Chaitin's algorithmic information theory, where a rational complex number z is the analog of a program p, an iterator f(kappa) is analogous to a universal Turing machine U which executes program p, and an unbounded orbit O(z,kappa) is analogous to an execution of a program p on U that halts. We define a real number Upsilon(kappa) which resembles Chaitin's Omega number, where, instead of being based on all programs p whose execution on U halts, it is based on all rational complex numbers z whose orbits under f(kappa) are unbounded. Hence, similar to Chaitin's Omega number, Upsilon(kappa) acts as a theoretical limit or a "fractal oracle number" that provides an arbitrarily accurate complexity-based approximation of the filled Julia set K-kappa. We present a procedure that, when given m and kappa, it uses Upsilon(kappa) to generate K-kappa(m). Several numerical examples of sets that estimate K-kappa(m) are presented.
We present yadism, a library for the evaluation of both polarized and unpolarized deep-inelastic scattering (DIS) structure functions and cross sections up to N3\documentclass[12pt]{minimal} \usepackage{amsmath} \usep...
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We present yadism, a library for the evaluation of both polarized and unpolarized deep-inelastic scattering (DIS) structure functions and cross sections up to N3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$<^>{3}$$\end{document}LO in perturbative QCD. The package provides computations of observables in fixed-flavor and zero-mass variable flavor number schemes. The implementation of the general mass variable flavor number schemes is supported through the high virtuality limits for the heavy flavor coefficients. In addition, yadism provides a set of tools for the generation of interpolation grids in the PDF-independent PineAPPL format, allowing to test the PDF dependence on any DIS observable without needing to rerun the computation. This work is part of an ongoing effort to standardize the format of theory predictions in high-energy physics within the pineline framework. The code is open source, written in Python and documented to facilitate usage, integrations, and further extensions. Finally, the code has been benchmarked against the widely used APFEL++ and QCDNUM libraries.
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