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| Title | Discrete fast Wavelet transform Algorithm and its Application to prediction problem |
| Authors | Zaharov V.V., Fausto Casco S. |
| Category | Electronics, Electrotechnics |
| Abstract | Method of nonstationary stochastic process prediction using discrete wavelet transform is presented. As it is shown, the application of Discrete Wavelet Transform in maximum entropy prediction method allows decrease the square average prediction error in comparison with conventional methods that use algorithm of Discrete Fourier Transform approximately 3-4 times for presented test sequence. Its advantage was obtained due to information about process structure in the varied bands of frequency that received from coefficients of Discrete Wavelet Transform. |
| Issue | 8 |
| Date_posted | 10/16/2002 |
| URL (full text) | http://www.acadjournal.com/2002/v8/part1/p1/index.html |
| email | vick@xanum.uam.mx |
| Address | Universidad Autonoma Metropolitana - Iztapalapa,
Av. Michoacan y Purisima, Colonia Vicentina, C.P.09340,Mexico D.F., MEXICO, |
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| Title | Information nature of optimal classifications |
| Authors | Dr. David Kisets |
| Category | Mathematics |
| Abstract | The paper discusses the information approach to the investigation of classification systems aimed at establishing the objective numerical conditions that enable to recognize the degree of system optimality and create new optimum systems. The principle of information cyclicity is used as the criterion in the investigation. The proposed approach corresponds to the best existing classification systems and is exemplified with some new ones. The paper focuses on the mathematically valid universal classification model. |
| Issue | 8 |
| Date_posted | 10/16/2002 |
| URL (full text) | http://www.acadjournal.com/2002/v8/part3/p1/index.html |
| email | kisets@netvision.net.il |
| Address | The National Physical Laboratory of Israel, |
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| Title | Reinforced Prefabricated Timber Shear Walls |
| Authors | Miroslav Premrov, Peter Dobrila |
| Category | Civil Engineering |
| Abstract | The paper presents results of shear-bending experiments performed on panel shear walls used as load-carrying capacity walls in the construction of prefabricated timber structures. The aim of research is to determine the difference in resistance and ductility between panel shear walls, reinforced with two different methods. While the first, reinforcing with additional fiberboard, was not improve resistance and especially ductility in the contended sense, we tried to find a solution by inserting diagonal steel strips, which were fixed to the timber frame. Additionally, analytical solutions of those by mathematical modeling with the fictive thickness and height of fiber-plaster boards are proposed. Presented design models are simple and show a good coincidence with the measured results |
| Issue | 8 |
| Date_posted | 10/16/2002 |
| URL (full text) | http://www.acadjournal.com/2002/v8/part8/p1/index.html |
| email | miroslav.premrov@uni-mb.si |
| Address | University of Maribor, Faculty of Civil Engineering, Smetanova ulica 17, SI-2000 Maribor, Slovenia |
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| Title | Software package for Accounting , Proce and Management of Energy Consumption |
| Authors | Simeon Angelov *, Dichko Batchvarov **, Kiril Belov**, Fikret Calikoglu ***,
Ani Boneva **, Rumyana Krasteva, Andrey Zamanov**, Veselin Geortchev** |
| Category | IT and Computing |
| Abstract | The information system for data reading and management of energy consumption is an important tool for building of accounting and control systems. Using electronic energy meters increases the reliability and accuracy of user accounted data. HHU reading of the electronic energy meters and PC processing with present software package represent a base for full automation of the accounting process. |
| Issue | 8 |
| Date_posted | 10/16/2002 |
| URL (full text) | http://www.acadjournal.com/2002/v8/part5/p1/index.html |
| email | dichko@clmi.bas.bg |
| Address | * OMNITEL Ltd. , Bulgaria; Central Laboratory of Mechatronics and Instrumentation - BAS ,BASARI ELEKTRONIK A.S.
Ankara, TURKEY |
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| Title | Vacuum Heat Treatment of Tool Steels and its impact on the operational Qualities of the tools |
| Authors | Ivanka Savova Pencheva, Nikolay Ivanov Petrov |
| Category | Chemistry |
| Abstract | On the present stage the material production in all economically well developed countries expandsunder circustances of savings of rough materials and energy, under highly set reqirements for effectiveness and environment-friendly production processes. In this respect the vacuum heat treatment is one of the most prospective methods for heat treatment of tool steels to improve their operational characteristics.
The objective of the present research was to monitor and study the behaviour of tool steels when they are vacuum heat treated with a view to the changes in their chemical composition and the microrelief of their surfaces and some quantity estimations to be done to the strength of the said heat treated cutting and deforming tools. |
| Issue | 8 |
| Date_posted | 10/16/2002 |
| URL (full text) | http://www.acadjournal.com/2002/v8/part2/p1/index.html |
| email | nikipetrov@lycos.com |
| Address | National military university - V. Tarnovo, Bulgaria
University “Prof. Assen Zlatarov” – Bourgas, Bulgaria |
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