نتایج جستجو برای: numerical calculation

تعداد نتایج: 424241  

2009
Po Kin Leung Charles F. Gammie

Magnetobremsstrahlung emission and absorption plays a role in many astronomical systems. We describe a general numerical scheme for evaluating magnetobremsstrahlung emission and absorption coefficients for both polarized and unpolarized light in a plasma with general distribution function. Along the way we provide an accurate scheme for evaluating Bessel functions of high order. We use our sche...

Journal: :RASI 2013
Camilo Lezcano Andrés Amell Francisco Cadavid

This paper performs calculations of the recirculation factor in simulations of a flameless combustion furnace with different percentages of oxygen in air (from 21% to 100% O2). Results are compared with Magnussen’s recirculation theory and show that when there are chemical reactions, the recirculation results are overpredicted. An alternative correlation to Magnussen’s theory is proposed, usefu...

2013
Nelson H. F. Beebe

(sinα)/α [113]. 0 [210]. 1 [222]. 1/π [188, 189]. 1/π [217, 189]. 10, 000 [49]. 10, 000, 000 [134]. 16 [197]. 2 [52, 55]. 2 + 2 [209]. 2, 000 [35]. 2, 576, 980, 370, 000 [211]. 29, 360, 000 [98]. 2H2 [221]. b [176]. e [99, 93, 56, 34, 111, 28, 35, 36, 209, 12, 54]. e−(π/2) = i [13]. GL(n, Z) [96]. n [141, 96, 133]. φ [187, 194]. π [228, 183, 84, 135, 97, 136, 169, 227, 31, 98, 99, 24, 20, 168, ...

2001
Uwe Trittmann

We consider the Maldacena conjecture applied to the near horizon geometry of a D1-brane in the supergravity approximation and present numerical results of a test of the conjecture against the boundary field theory calculation using supersymmetric discrete light-cone quantization (SDLCQ). We present numerical results with approximately 1000 times as many states as we previously considered. These...

2014
Jixuan Yuan

Original scientific paper The influence of sound loudness in an enclosed cavity caused by thickness variation of plastic plate, which is simply supported on an enclosed cavity with five rigid walls and excited by a harmonic force, is studied in this article by using numerical algorithms. Based on Finite Element Method (FEM) and Zwicker’s Loudness Model, loudness in a structural-acoustic coupled...

2012
Marinella Cappelletti Brian Butterworth Michael Kopelman

OBJECTIVE To characterize the numerical profile of patients with acquired brain disorders. METHOD We investigated numeracy skills in 76 participants--40 healthy controls and 36 patients with neurodegenerative disorders (Alzheimer dementia, frontotemporal dementia, semantic dementia, progressive aphasia) and with focal brain lesions affecting parietal, frontal, and temporal areas as in herpes ...

2017
Mingjia Li M. J. Li

As a kind of weak-path dependent options, barrier options are an important kind of exotic options. Because the pricing formula for pricing barrier options with discrete observations cannot avoid computing a high dimensional integral, numerical calculation is time-consuming. In the current studies, some scholars just obtained theoretical derivation, or gave some simulation calculations. Others i...

2014
Marasovic Branka Aljinovic Zdravka Poklepovic Tea

Numerical methods like binomial and trinomial trees and finite difference methods can be used to price a wide range of options contracts for which there are no known analytical solutions. American options are the most famous of that kind of options. Besides numerical methods, American options can be valued with the approximation formulas, like Bjerksund-Stensland formulas from 1993 and 2002. Wh...

2014
Robert Yung Peter Van Roy Bruce K. Holmer

Numerically intensive calculations are not well supp orted by Prolog, yet there are important applications that require tightly coupled symbolic and numeric calc ulations. We identify some additional built-in pred icates and macros for Prolog to suppon numeric calculations. These predicates are implemented in several layers of software and hardware, including a specially designed high performan...

1999
CRISTIAN CIOBANU YUHUI LIU YUNZHI WANG BRUCE R. PATTON

A numerical method for the calculation of the electrical conductivity of porous ceramics for gas sensing applications is developed, which takes into account detailed microstructural features by mapping a mesoscopic irregular resistor network onto the microstructure. The overall conductance of the ceramic sample is obtained by solving the Kirchhoff equations for the irregular network using an ef...

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