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Topic: Numerical integration

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  Numerical integration - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-07)
Numerical Integration with the Monte Carlo method: Nodes are random equally distributed.
In numerical analysis, numerical integration constitutes a broad family of algorithms for calculating the numerical value of a definite integral, and by extension, the term is also sometimes used to describe the numerical solution of differential equations.
Numerical integration algorithms are found in GAMS class H2.
en.wikipedia.org /wiki/Numerical_integration   (1533 words)

 Numerical analysis - Wikipedia, the free encyclopedia
Numerical analysis is the study of algorithms for the problems of continuous mathematics (as distinguished from discrete mathematics).
Numerical integration, in some instances also known as numerical quadrature, asks for the value of a definite integral.
Numerical analysis is also concerned with computing (in an approximate way) the solution of differential equations, both ordinary differential equations and partial differential equations.
en.wikipedia.org /wiki/Numerical_analysis   (1762 words)

 Numerical integration: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-10-07)
In numerical analysis, the runge-kutta methods are an important family of implicit and explicit iterative methods for the approximation of solutions of ordinary...
In numerical analysis, the newton-cotes formulas, also called the newton-cotes rules, are a group of formulas for numerical integration (also called...
In the mathematical subfield of numerical analysis and in computer graphics a bézier spline is a spline curve where each polynomial of the spline is in...
www.absoluteastronomy.com /encyclopedia/n/nu/numerical_integration.htm   (2548 words)

 Assignment 1: Spring-mass system using Numerical Integration   (Site not responding. Last check: 2007-10-07)
Numerical integration is an approach to solve ODEs in reasonable time.
Numerical integration segments the independant variable (in our case, time) into discrete steps (denoted by the step size, h).
At this point, one of the three numerical integration techniques is used to approximate a new position based on the velocity over a discrete step.
goanna.cs.rmit.edu.au /~crpearce/CLS/Ass1HTML/report.html   (1474 words)

 Numerical Integration of Sun, Moon, and Planets
Numerical integration of the system of ordinary differential equations is carried out by an Adams-Bashforth-Moulton predictor-corrector method.
The integrator settings adopted for most of the tests were an Adams order of 11 and step size of 3/16 day; these are near the optimum values for the Moon's motion using IEEE 754 double precision floating point arithmetic.
The integrator output ephemeris files must be given different names also, as the program will overwrite and destroy the data if it is told a pre-existing file name for output.
www.moshier.net /ssystem.html   (2560 words)

 Numerical Integration: Introduction   (Site not responding. Last check: 2007-10-07)
For example, if a car is moving along a straight line and we know the speed of the car as a function of time, it is possible to determine the total change in the car's position over some time interval.
By integrating the model, we approximate the (true) integral of the underlying (unknown) function.
First, we integrate pre-collected data concerning the rate at which carbon-dioide is produced in an aquatic environment.
www.geom.uiuc.edu /education/calc-init/integration   (266 words)

 UCES Methods and Analysis Chap. 2.3: Numerical Integration / Trapezoidal Rule
The third application involves numerical derivatives and we see how this is related to the previous discrete models for the diffusion of heat.
The trapezoid sum algorithm for numerical integration is based on the approximation of the area by looking at trapezoids associated with portions of the area, provided the function is nonnegative.
There are many other numerical integration methods which have higher orders of convergence or are for special functions such as those with large oscillations.
www.krellinst.org /UCES/archive/classes/CNA/dir2.3/uces2.3.html   (1177 words)

 Numerical Integration
In this case, the final result is numerically quite close to the correct answer.
to specify an integration contour to follow in the complex plane.
break the integration region into several pieces, with a small piece that explicitly covers the neighborhood of the peak.
documents.wolfram.com /v4/MainBook/3.9.3.html   (553 words)

 7.3 Numerical integration   (Site not responding. Last check: 2007-10-07)
Numerically, the value of the integral can be determined to arbitrary precision by successively increasing the number of panels between the limits
While this approach to numerical integration is intuitive and follows the definition of definite integrals that you learned in your calculus class, it is inefficient.
Simpson's method should always be your first choice for integrating numerically and often you won't need anything fancier.
www.physics.nau.edu /~hart/matlab/node53.html   (596 words)

 Riemann Sums, Simpson's Rule
The graphing screen is large and you will have to move from this text screen to the graphing screen by means of the mouse while learning how to use the applet.
The type, the integer N, and the numerical value of the associated riemann sum are printed in the text area.
However, the numerical values of the trapezoidal sums and the simpson sums illustrate the relative accuracy of the simpson algorithm.
www.math.ucla.edu /~ronmiech/Java_Applets/Riemann   (819 words)

 Gaussian Numerical Integration
It was then a simple matter to integrate each interpolating function across its respective subinterval and find the sum of these values.
We then apply a particular numerical method to f(x) that will give the exact value of the definite integral if f(x) is replaced by such a polynomial.
Therefore since (15) holds for all polynomials p(x) of degree 1 or less, but does not hold for all polynomials of degree 2, the degree of precision of (15) is 1.
www.mathcs.emory.edu /ccs/ccs215/integral/node6.html   (1569 words)

 Numerical Integration
TrapezoidRule.java numerically integrates a function of one variable using the trapezoid rule.
The trapezoid rule is rarely used to integrate in practice.
The program SimpsonsRule.java numerically integrates x^4 log (x + sqrt(x^2 + 1)) from a = 0 to b = 2.
www.cs.princeton.edu /introcs/93integration   (1079 words)

 Singularity » Numerical Integration with Gauss-Legendre   (Site not responding. Last check: 2007-10-07)
Gauss-Legendre is an elegant numerical integration algorithm that approximates the value of an integral over [-1,1].
Integration over an arbitrary interval [a,b] is accomplished with a simple change of variable.
There is a large amount of online material available for numerical integration -- read this paper if you want an excellent introduction to Gauss-Legendre.
www.2112fx.com /blog/pivot/entry.php?id=49   (189 words)

 65: Numerical analysis
Numerical solutions to differential equations require the determination not of a few numbers but of an entire function; in particular, convergence must be judged by some global criterion.
Applications of numerical analysis occur throughout the fields of applied (numerical) mathematics, in particular in the fields of physics (sections 70-86).
Use of orthogonal polynomials for quadrature (numerical integration a la Gauss-Legendre).
www.math.niu.edu /~rusin/known-math/index/65-XX.html   (1442 words)

 Numerical Integration - Smyth (ResearchIndex)   (Site not responding. Last check: 2007-10-07)
Gordon K. Smyth May 1997 Numerical integration is the study of how the...
An excellent general reference on numerical integration is [5].
Recent surveys of numerical integration with emphasis on statistical methods and applications are [10] and [9].
citeseer.ist.psu.edu /244636.html   (211 words)

 Simpson's Rule for Numerical Integration
The numerical integration technique known as "Simpson's Rule" is credited to the mathematician
His also worked in the areas of numerical interpolation and probability theory.
This is an numerical approximation to the integral of
math.fullerton.edu /mathews/n2003/SimpsonsRuleMod.html   (225 words)

 Unit 7 - Numerical Integration 
In calculus we use the symbol of integration (a large S for sum) to name the area.  We write:
Following the definition of the definite integral, we break the area under the curve into a number of small regular geometric shapes, calculate the sum of the smaller areas and then try to converge to a number which is more or less independent of the particular way we choose to partition the area.
This is, in fact, the approach used in   numerical integration.
clipper.lehigh.edu /engr1/notes/NumIntegration.htm   (1172 words)

 Wolfram Research, Inc.
NIntegrate::slwcon: Numerical integration converging too slowly; suspect singularity, value of the integration is 0, oscillatory integrand, or insufficient WorkingPrecision.
NIntegrate::ploss: Numerical integration stopping due to loss of precision.
Achieved neither the requested PrecisionGoal nor AccuracyGoal; suspect highly oscillatory integrand, or the true value of the integral is 0.
documents.wolfram.com /v3/MainBook/3.9.3.html   (711 words)

 Numerical Integration Tutorial   (Site not responding. Last check: 2007-10-07)
In this tutorial we will explore the rectangular and trapezoidal methods for numerical integration that are discussed in Chapter 15.
We will be using a graphical simulation of numerical integration methods throughout this tutorial.
There will also be a pair of vertical white lines at either end of the graph, which represent the limits of integration.
www.cs.utah.edu /~zachary/isp/applets/Integrate/Integrate.html   (335 words)

 Numerical Integration: Gaussian Quadratures
Gauss-Legendre Formula: The Gauss-Legendre integration formula is the most commonly used form of Gaussian quadratures.
Some numerical analysis books refer to the Gauss-Legendre formula as the Gaussian quadratures' definitive form.
It is based on the Legendre polynomials of the first kind
www.efunda.com /math/num_integration/num_int_gauss.cfm   (204 words)

 Numerical Integration
In these cases, it is usually good enough to find an approximate, or numerical solution, and there are some very straighforward ways to do this.
The simplest numerical approximations to the integral are the left and right Riemann sums.
To automate the entire calculation, or to use much larger values of n, try our Numerical Integration Utility.
www.zweigmedia.com /ThirdEdSite/integral/numint.html   (1171 words)

 Methods for Numerical Integration   (Site not responding. Last check: 2007-10-07)
This applet allows a person to test several numerical integration approximation methods by having the user fill out the left and right endpoint fields, type in the formula, select the method, and pressing the calculate button.
For example try typing in -1 for the left endpoint, 1 for the right endpoint, and y=x^2 for the formula then press calculate.
Also the "*" operator is not necessary when multiplying times x.
www.mste.uiuc.edu /activity/integration   (157 words)

 Bibliography: Discovery of Global Warming   (Site not responding. Last check: 2007-10-07)
Charney, Jule G. "On a Physical Basis for Numerical Prediction of Large-Scale Motions in the Atmosphere." J.
"Numerical Integration of the Barotropic Vorticity Equation." Tellus 2: 237-54.
On a Numerical Method for Integration of the Hydrodynamical Equations with a Spectral Representation of the Horizontal Fields.
www.aip.org /history/climate/bib.htm   (10621 words)

 Fibonacci numerical integration on a sphere   (Site not responding. Last check: 2007-10-07)
For elementary numerical integration on a sphere, there is a distinct advantage in using an oblique array of integration sampling points based on a chosen pair of successive Fibonacci numbers.
Besides the oblique Fibonacci array, the prescription we give is also based on a non-uniform scaling used for one-dimensional numerical integration, and indeed achieves the same order of accuracy as for one dimension: error ~N
This benefit of Fibonacci is not shared by domains of integration with boundaries (e.g., a square, for which it was originally proposed); with non-uniform scaling the error goes as N
stacks.iop.org /0305-4470/37/11591   (306 words)

 Webmath.com: Find the numerical answer to a definite integral   (Site not responding. Last check: 2007-10-07)
This page will give you the numerical answer to an integral.
It will not show you how to do the integral, and you must type in two numerical limits of integration.
Sorry it does’t show you how to do the integrals, but it can be useful for checking answers to integrals you may be working on.
www.webmath.com /nintegrate.html   (73 words)

 Programming Languages
Numerical Recipes in C : The Art of Scientific Computing
The product of a unique collaboration among four leading scientists in academic research and industry, Numerical Recipes is a complete text and reference book on scientific computing.
It covers a surprisingly wide range of algorithms: routines are included for everything from handling Julian dates and solving systems of linear equations to determining eigenvectors and singular value decompositions, solving differential equations, doing numerical integration (quadrature), not to mention calculating fast fourier transforms, lomb periodograms and maximum entropy spectral analyses.
www.alltextbook.com /h_Books/491314_1.html   (2740 words)

 Welcome to the NINES homepage (nines)
This is the homepage of the Numerical Integration, Nonlinear Equations and Software (NINES) Group at the Katholieke Universiteit Leuven.
You may be interested in our software archive which has more classical cubature rules.
The famous QUADPACK or Cubpack++ with an extended collection of 2D regions or CUBPACK for low to medium dimensional integration over hypercubes and simplices.
www.cs.kuleuven.ac.be /~nines   (171 words)

 Numerical Integration - Compare Prices, Reviews and Buy at NexTag - Price - Review
Numerical Integration - Compare Prices, Reviews and Buy at NexTag - Price - Review
Geometric Numerical Integration: Structure-preserving Algorithms for Ordinary Diff...
Numerical Integration IV: Proceedings of the Conference at the Mathematical Resear...
www.nextag.com /numerical-integration/search-html   (58 words)

 18 Overview, M252, Oregon State University
Our technique so far for finding a definite integral (an integral with limits of integration) requires that we find an antiderivative of the integrand.
Mathematicians can prove that there is no closed form for an antiderivative for
We will explore the approximation techniqes called the Midpoint Rule, the Trapezoidal Rule, and Simpson's Rule.
oregonstate.edu /instruct/mth252/cq2/Lesson16/overview.html   (98 words)

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