Results 241 to 250 of about 166,361,988 (297)
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Inconsistencies in moment methods
Physical Review E, 2002In this work we show that moment methods devised to solve the Boltzmann kinetic equation for a simple gas exhibit some inconsistencies. This puzzle, which also appears for the Chapman-Enskog method, is solved resorting to a perturbative expansion in the Knudsen number, thus allowing for a clear way to arrive at a closure condition.
R M, Velasco +2 more
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Physical Review A, 1990
Using the kinetic theory of monatomic gases of hard-sphere particles as a base, we develop the method of moments of Grad [Commun. Pure Appl. Math 2, 331 (1949)] within the framework of algebraic computing. In this theory the basic fields are characterized by 13+9N moments of the distribution function, with 0\ensuremath{\le}N\ensuremath{\le}4.
, Reinecke, , Kremer
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Using the kinetic theory of monatomic gases of hard-sphere particles as a base, we develop the method of moments of Grad [Commun. Pure Appl. Math 2, 331 (1949)] within the framework of algebraic computing. In this theory the basic fields are characterized by 13+9N moments of the distribution function, with 0\ensuremath{\le}N\ensuremath{\le}4.
, Reinecke, , Kremer
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Capacitors and the method of moments
Computers & Electrical Engineering, 2004Abstract The inhomogeneous charge distribution in several plate capacitors is calculated using the Method of Moments. Effects of global and local “inhomogeneities” in the capacitor are simulated.
Er-Wei Bai, Karl E. Lonngren
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On image analysis by the methods of moments
Proceedings CVPR '88: The Computer Society Conference on Computer Vision and Pattern Recognition, 1988Various types of moments have been used to recognize image patterns in a number of applications. A number of moments are evaluated and some fundamental questions are addressed, such as image-representation ability, noise sensitivity, and information redundancy.
Teh, ChoHuak, Chin, Roland T
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SIAM Journal on Computing, 1997
Summary: Higher moment analysis has typically been used to upper bound certain functions. In this paper, we introduce a new combinatorial method to lower bound the expectation of the absolute value of a random variable \(X\) by the expectation of a quartic in \(X\). In the special case, where we are looking at the absolute value of a (weighted) sum of \
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Summary: Higher moment analysis has typically been used to upper bound certain functions. In this paper, we introduce a new combinatorial method to lower bound the expectation of the absolute value of a random variable \(X\) by the expectation of a quartic in \(X\). In the special case, where we are looking at the absolute value of a (weighted) sum of \
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Convergence of the Method of Moments
Physical Review, 1958A proof is given that the nth approximation of the method of moments is convengent when applied to the polaron problem. (auth)
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Physical Review B, 1985
I propose a method to compute the local density of electronic states in disordered systems. The method makes use of a particular form of the generalized moments of Lambin and Gaspard . It leads to an exact derivation of orthogonalized moments which are simply related to the coefficients of the continued-fraction representation of the density of states.
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I propose a method to compute the local density of electronic states in disordered systems. The method makes use of a particular form of the generalized moments of Lambin and Gaspard . It leads to an exact derivation of orthogonalized moments which are simply related to the coefficients of the continued-fraction representation of the density of states.
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1998
The Method of Moments (MoM) is part of a general body of mathematical techniques whose goal is to solve an integral equation by converting it into a matrix equation, which can then be readily solved on a computer. The MoM is one of the most well-developed and used of all numerical techniques available in electromagnetic analysis, including EMI/EMC work.
Bruce Archambeault +2 more
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The Method of Moments (MoM) is part of a general body of mathematical techniques whose goal is to solve an integral equation by converting it into a matrix equation, which can then be readily solved on a computer. The MoM is one of the most well-developed and used of all numerical techniques available in electromagnetic analysis, including EMI/EMC work.
Bruce Archambeault +2 more
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2002
In this chapter we shall deal only with a single non-degenerate relativistic gas, the main purpose being to describe the Grad method which is based on the moments of the one-particle distribution function. For a non-relativistic monatomic gas one often uses a thirteen moment description whose objective is the determination of the fields of particle ...
Carlo Cercignani +1 more
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In this chapter we shall deal only with a single non-degenerate relativistic gas, the main purpose being to describe the Grad method which is based on the moments of the one-particle distribution function. For a non-relativistic monatomic gas one often uses a thirteen moment description whose objective is the determination of the fields of particle ...
Carlo Cercignani +1 more
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The American Mathematical Monthly, 1923
(1923). The Method of Moments. The American Mathematical Monthly: Vol. 30, No. 6, pp. 307-311.
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(1923). The Method of Moments. The American Mathematical Monthly: Vol. 30, No. 6, pp. 307-311.
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