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A multiresolution homogenization of modal analysis with application to layered media

Zion Steinberg, Ben; McCoy, John J. - In: Mathematics and Computers in Simulation (MATCOM) 50 (1999) 5, pp. 393-417

We apply multiresolution techniques to study the effective properties of boundary value problems. Conditions under which boundary values are preserved in the effective (`homogenized') formulation are developed and discussed. Relations between the eigenfunctions and eigenvalues of the generic...

Persistent link: https://www.econbiz.de/10010870096

Effective scalar properties of the critical region in functionally graded materials

Van Siclen, C.D - In: Physica A: Statistical Mechanics and its Applications 322 (2003) C, pp. 5-12

The critical region in a compositionally graded material occurs where the dominant phase ceases to percolate, and so is poorly treated by effective medium theories. To address this problem, equations for the size and effective scalar properties of that region are obtained from percolation theory.

Persistent link: https://www.econbiz.de/10010589938

Automatic determination of envelopes and other derived curves within a graphic environment

Botana, Francisco; Valcarce, José L. - In: Mathematics and Computers in Simulation (MATCOM) 67 (2004) 1, pp. 3-13

Dynamic geometry programs provide environments where accurate construction of geometric configurations can be done. Nevertheless, intrinsic limitations in their standard development technology mostly produce objects that are equationally unknown and so can not be further used in constructions....

Persistent link: https://www.econbiz.de/10010869952

Computer-aided modelling and simulation of the thermodynamics of stream reforming

Grotendorst, J.; Dornseiffer, J. - In: Mathematics and Computers in Simulation (MATCOM) 51 (2000) 5, pp. 451-471

In this article we analyse the thermodynamics of steam reforming by using computing techniques from symbolics, numerics and graphics. It is shown that the integration of the various computing methods normally used separately in scientific problem-solving allows the development of efficient and...

Persistent link: https://www.econbiz.de/10010870327

Automatically building customized circuit-based simulation models using symbolic computing

Bastos, J.; Monti, A. - In: Mathematics and Computers in Simulation (MATCOM) 70 (2005) 4, pp. 203-220

Nowadays, most scientists and engineers rely on computer simulations to analyze, design, and prototype complex systems. Scientific and engineering system models are implemented in a variety of simulation environments; however, limited model libraries are often provided to users who are compelled...

Persistent link: https://www.econbiz.de/10010870611

A software tool for the investigation of plane loci

Botana, F.; Valcarce, J.L. - In: Mathematics and Computers in Simulation (MATCOM) 61 (2003) 2, pp. 139-152

We describe the capabilities of Lugares for obtaining the equations and graphs of plane loci. Lugares is a Windows program written in Prolog that offers a standard dynamic geometry environment and uses the symbolic capabilities of CoCoA, a computer algebra system specialized in Groebner basis...

Persistent link: https://www.econbiz.de/10010748485

A Java framework for massively distributed symbolic computing

Bernardin, Laurent - In: Mathematics and Computers in Simulation (MATCOM) 49 (1999) 3, pp. 151-160

We present a framework for implementing massively distributed applications in symbolic computing. Using this framework, computations with massive resource requirements can be distributed and processed in parallel on a network of workstations or on a large scale network such as the Internet. For...

Persistent link: https://www.econbiz.de/10010748736

An algebraic model for implementing expert systems based on the knowledge of different experts

Hernando, Antonio; Roanes-Lozano, Eugenio - In: Mathematics and Computers in Simulation (MATCOM) 107 (2015) C, pp. 92-107

The aim of this paper is to expound an original algebraic model for managing the knowledge provided by different expert humans when developing expert systems. This model is conceived as an extension of classical propositional logics in which each proposition is associated with a set of human...

Persistent link: https://www.econbiz.de/10011077431

Modelling and optimization of transparent parabolic trough collector based on gas-phase nanofluids

de Risi, A.; Milanese, M.; Laforgia, D. - In: Renewable Energy 58 (2013) C, pp. 134-139

The Parabolic Trough Collector (PTC) is the most common type of high-temperature solar thermal technology, in which the heat transfer fluid is usually synthetic oil, molten salt or water/steam. Experiences in existing plants have shown some operating problems with all these types of fluid, which...

Persistent link: https://www.econbiz.de/10010803625

A review on natural convective heat transfer of nanofluids

Haddad, Zoubida; Oztop, Hakan F.; Abu-Nada, Eiyad; … - In: Renewable and Sustainable Energy Reviews 16 (2012) 7, pp. 5363-5378

Nanofluids are considered to have great potential for heat transfer enhancement and are highly suited to application in … the enhancement or control of heat transfer using nanofluids. The main aim upon which the present work is based is to give … a comprehensive review on the research progress on the natural convective heat transfer characteristics of nanofluids …

Persistent link: https://www.econbiz.de/10010664461

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