نتایج جستجو برای: تقریب pade

تعداد نتایج: 4622  

1999
Payam Rabiei Massoud Pedram

A method is introduced for model order reduction of large circuits extracted from layout. The algorithm, which is based on balanced realization, can be used for reducing the order of circuits before circuit-level simulation. In contrast to Padebased algorithms which match the reduced order system with original system in some given frequencies, balanced realization based model algorithms provide...

2003
MEHDI DEHGHAN

Parabolic partial differential equations with nonlocal boundary specifications feature in the mathematical modeling of many phenomena. In this paper, numerical schemes are developed for obtaining approximate solutions to the initial boundary value problem for one-dimensional diffusion equation with a nonlocal constraint in place of one of the standard boundary conditions. The method of lines (M...

ژورنال: :پژوهش فیزیک ایران 0
مرتضی سلطانی m soltani department of physics, university of isfahan, isfahanگروه فیزیک، دانشگاه اصفهان، اصفهان امین جواهری a javaheri department of physics, university of isfahan, isfahanگروه فیزیک، دانشگاه اصفهان، اصفهان محمد هادی m hadi department of physics, university of isfahan, isfahanگروه فیزیک، دانشگاه اصفهان، اصفهان

در این کار ما به تعمیم درهم تنیدگی سه بخشی میدان بوزونی در حضور یک ناظر نالخت به فراتر از تقریب تک مد پرداخته ایم. برای این منظور ابتدا مروری به اثر شتاب بر روی مدهای میدان و اثر آن بر روی حالت های کوانتومی کرده و تقریب تک مد و فراتر از تقریب تک مد را نیز معرفی می کنیم. پس از این مرور اجمالی به سراغ مسئله اصلی این مقاله که بررسی درهم تنیدگی سه بخشی میدان بوزونی در فراتر از تقریب تک مد است می پر...

Journal: :International Journal of Power Electronics and Drive Systems 2022

<p>In this paper, a modified procedure based on the residual power series method (RPSM) was implemented to achieve approximate solution with high degree of accuracy for system multi-pantograph type delay differential equations (DDEs). This is considered as hybrid technique used improve curacy standard RPSM by combining RPSM, Laplace transform and Pade approximant be powerful that can solv...

Journal: :Mathematical modeling and computing 2023

The objective of this research is to examine the steady incompressible two-dimensional hydromagnetic boundary layer flow nanofluid passing through a stretched sheet in influence viscous and ohmic dissipations. present problem obtained with help an analytical technique called DTM-Pade Approximation. mathematical modeling considered form partial differential equation transformed into suitable sim...

علی الله وردی مجتبی شیرانی

در این مقاله به بررسی دیدگاههای تقریبی و وحدت گرایانه آیت‌‌الله مکارم شیرازی پرداخته شده است. هدف از این بررسی آشنایی با خدمات بی‌‌وقفه این دانشمند بزرگ اسلامی در راستای تقریب و وحدت امت اسلامی است. ایشان در آثار و سخنرانیهای خود همواره قرآن را حلقه اتصال و وحدت امت اسلامی دانسته و کوشیده است با استفاده از آیات قرآن، ضرورت این امر را روشن ساخته و خطرات اختلاف و افتراق امت اسلا...

2007
Husain M. Masoudi

A novel nonparaxial technique based on Pade approximant for modeling ultra short optical pulses has been discussed and verified. The characterization of the technique shows excellent performance in terms of accuracy, efficiency, and stability where the tradiFigure 4 Variation of return loss with frequency for S-MP&SLGPMRMSA-OPMS when Ls1 14 mm. [Color figure can be viewed in the online issue, w...

Journal: :Applied Mathematics and Computation 2002
Arnold Knopfmacher Doron S. Lubinsky

A 1961 conjecture of Baker, Gammel and Wills asserts that if a function f is meromorphic in the unit ball, and analytic at 0, then a subsequence of its diagonal Pade approximants converges uniformly in compact subsets omitting poles. Inasmuch as the denominators of the Padé approximants are complex orthogonal polynomials, and the convergence of sequences of Padé approximants is determined large...

Journal: :IEEE transactions on neural networks 1995
Robert C. Williamson Uwe Helmke

Some approximation theoretic questions concerning a certain class of neural networks are considered. The networks considered are single input, single output, single hidden layer, feedforward neural networks with continuous sigmoidal activation functions, no input weights but with hidden layer thresholds and output layer weights. Specifically, questions of existence and uniqueness of best approx...

2009
Abiodun M. Aibinu Momoh J. E. Salami Amir A. Shafie Athaur Rahman Najeeb

Autoregressive Moving average (ARMA) is a parametric based method of signal representation. It is suitable for problems in which the signal can be modeled by explicit known source functions with a few adjustable parameters. Various methods have been suggested for the coefficients determination among which are Prony, Pade, Autocorrelation, Covariance and most recently, the use of Artificial Neur...

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