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Article “Finite-Difference Approximation…”

Aug 22, 2012

Aug 22, 2012

In Simmakers blog a new article in “Mathematical Notes” was published. The article “The finite-difference approximation of boundary conditions of the second and third order for the non-linear heat equation” describes an approach based on the account of the heat equation for the boundary node.

The whole text you may read here

 

“Oil and gas-2012” Exhibition

Jul 05, 2012

On June 25-29 2012 in Moscow was held “Oil and gas 2012” Exhibition , which was the hugest exhibition of Russian oil and gas complex and corresponded to the world-class event. Special attention was focused on geological and geophysical research, prospecting and exploration of oil and gas fields, construction of wells, oil refining and petrochemicals, information and software development, research and project development, environment and environmental monitoring.


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Article “Alternate directions implicit scheme and …”

Jun 14, 2012

The ADI (alternate directions implicit) method is widely used for the numerical solution of multidimensional parabolic PDE (partial differential equations). [1]. Although the method is known for a long time and is well described in the text-books, its practical realizations sometimes appear to be inaccurate [2]. The inaccuracy arises every time when one neglects the correct account of the so-called intermediate boundary conditions. This neglect can become the cause of instabilities even when the used ADI-scheme is known to be unconditionally stable in the frame of von Neumann spectral analysis technique [3]. The procedures of a correct account of the intermediate boundary conditions (for the Peaceman-Rachford ADI-scheme), are described in [4, 5, 6].

Article in journal “Industrial ecology”

May 18, 2012

Computer simulation is becoming more widely used for predicting the effects of industrial objects on the environment.

I.А. Gishkeluk, D.V. Еvlanov, V.I. Kovalenko

Simmakers Ltd.

Computer simulation for environmental problems solving in oil and gas industry

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XXII Annual Exhibition Softool 2011

May 16, 2012

Nov 08, 2011

On October 25-28 2011 the XXII Annual Exhibition of Information and Communication Technologies Softool was held in Moscow. It was organized with the support of Russian Academy of Science and the Ministry of Communications and Mass Communications of Russia.

Various IT-companies, universities and scientific organizations took part in the exhibition. They presented their development and the authorities and Departments of Information Technologies of Russian regions presented their information systems.

Softool Exhibition plays an important role in the technological independence and security, helps to maintain high scientific potential in the field of advanced technologies and to solve the problem of regional infrastructure and market data products and services integration into the world.

 
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Belarusian Exhibition TIBO

May 15, 2012

Each year the international exhibition attracts the largest IT and telecommunication companies, software production leaders and communications services operators of the country and the world.

The largest exhibition of this kind includes the latest products and services in the field of telecommunication, information and banking technology and security. This year the focus of attention of the International Forum TIBO 2009 is the latest information technology solutions and their effective deployment, telecommunication infrastructure and services market development, e-governance, a competitive knowledge economy projects.

During the specialized exhibitions, seminars and press conferences the latest telecommunication, IT and banking technology tendencies and solutions, which help to create a competitive and resource-efficient economy, were introduced.

Over 220 companies from 15 countries participated in the exhibition this year. Among the participants were such world-famous companies as IBM, Microsoft, Oracle, Intel, Hewlett-Packard, Dell, and others.

 

Simmakers on Tibo 2009
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Application of computer modeling for forecasting of radionuclides migration in soil (CEMEPE 09)

Jan 15, 2009

Second International Conference on Environmental Management, Engineering, Planning and Economics (CEMEPE 09) & SECOTOX Conference, Greece, June 21 to 26, 2009.

Abstract

An outlook of various methods of computer modeling application for the analysis and forecasting of radionuclides migration in the soil is being discussed. The focus is that further progress in this field is expected due to the development of universal program facilities integrating analytical models, expert and information systems, data bases, geographic information systems (GIS), etc. In this respect an approach of combined methods of physical-mathematical modeling and expert systems application along with supplementary fuzzy logic instruments in subject domain is being considered.

A new mathematical model of radionuclides transport in near-surface soil layer under non-isothermal conditions is being proposed in this paper. The given model takes into account the soil moisture content change effecting the solute transport and sorption owing to evaporation processes and recondensation of water vapor. Moreover numerical investigations of solute transport in aeration zone under rainfalls infiltration and moisture evaporation from soil surface have been implemented.

The article also covers the possibility of hybrid expert systems (HES) application for solving contaminants migration in the soil. Special structure of HES including models hybridization is being proposed. It includes both expert system for pre- and post data processing and artificial neural networks as solving mechanism (neuronet’s model). To increase system flexibility and prediction accuracy, it is recommended to use one copy of ANN for each migration substance. The proposed approach allows to upgrade (to perform posterior training) the expert system during its running without losing previous training results.

On the basis of given methods and models a new software has been developed. It splits into several modules that include mathematical model, HES, GIS-instruments and data base for storing necessary information (maps, various experimental data, calculating results etc.). For modules’ software implementation dynamic replaceable plug-ins technology has been used.

Keywords: mathematical modeling; hybrid expert systems; radionuclides transport; contaminants migration; soil physics.