SVIBOR - Project code: 2-07-222

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

SVIBOR

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Project code: 2-07-222


MEASUREMENT AND ANALYSIS OF STOCHASTIC SIGNALS AND PROCESSES


Main researcher: VOJNOVIĆ, BOŽIDAR (52834)


Assistants
Type of research: applied
Duration from: 01/01/91. to 12/31/93.
Papers on project (total): 75
Papers on project quoted in Current Contents: 1
Institution name: Institut "Ruđer Bošković", Zagreb (98)
Department/Institute: Department of Technology, Nuclear Energy and Radiation Protection
Address: Bijenička 54
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 42-88-51
Fax: 385 (0)1 42-88-51
Summary: The project covers research on measurement and analysis of stochastic signals and processes as well as development of techniques and devices based on the results of this research. Research of one-dimensional pulse signals includes several issues: stochastic pulse methods of measurement of fiber optic parameters in the amplitude and time domain (response, attenuation, time delay, time delay dispersion, stability of parameters), as well as stochastic methods of measurements of characteristics of nanosecond pulse circuits. The methods use the experimental determination of probability density function (pdf) of measured quantities and their statistical evaluation. Multichannel selector of digitized values of amplitude and time parameters is used. Application of artificial neural networks in classification and processing of signals. Development of the circuits for electroopptical modulation, as well as interfaces between fast analog-to-digital converters (ADC) and personal computers, controlled by programmable logic devices (PLD). The area of two-dimensional signal processing covers methods of image processing, which includes the processing of the 2D image obtained by CCD camera, as well as the processing of the image obtained by computer simulation. The processing is based on feature extraction using circular scanning. Further step includes application of artificial neural networks in image processing. Specific image processing in the area of biosensor development is directed toward the method of fluorescence spectroscopy by total internal reflection (TIRF) on planar surfaces, using thermoelectric cooled CCD camera. The analysis of stochastic processes includes primarily the application of fault tree method in failure probability determination of complex systems. Software application and development for measurement and analysis of signals and processes. Theoretical model for build-up factor approximation for shielding materials. Analysis and utilization of redundancy in set of strings with application to Croatian word list.

Keywords: stochastic signal, stochastic process, distribution function, stochastic method, time interval, pulse amplitude, optical fibre, nanosecond pulse, resolution, circular scanning, feature extraction, feature classification, image processing, programmable logic devices, neural networks, signal classification, system effectiveness, reliability, PSA, biosensors, build-up factor, redundancy, software, string, word list

Research goals: The goals of the research on the project are multiple: widening of the knowledge on methods of analysis and measurements of stochastic signals and processes; improvement and development of new measuring methods, development of very fast electronic circuits; development of fast digital interfaces controlled by programmable logic devices (PLD); improvement of feature extraction method in simple two-dimensional images for pattern recognition in robot vision, research of theoretical and experimental basis for development specific expert system using artificial neural networks; development of reliability analysis of complex systems, and methods of risk assessment as a consequence of technological system operation; creation of expert knowledge as a basis for development of special electronic and optoelectronic instrumentation; education of young scientist. Results are expected in the following areas: accuracy improvement of the measurement of stochastic pulses parameters, which is important in many areas, such as short time intervals measurement, distance measurement in robot vision, distance measurements by laser etc.; accuracy improvement of measurements on fast electronic and optoelectronic pulse circuits and components; application of neural networks in EEG signal processing; application of fast programmable logic devices (PLD) in development of fast digital circuits; application of stochastic methods in the reliability of complex systems analysis; application of statistical methods in materials and devices diagnostics; development of the method for compressing trie format; improvement of build-up factor approximation.

COOPERATION - PROJECTS


  1. Name of project: P-1A1482 Verjetnostna varnostna analiza
    Name of institution: Nuklearna elektrarna Krško
    City: Krško, SLOVENIJA

COOPERATION - INSTITUTIONS


  1. Name of institution: The University of Utah, Bioengineering
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: Salt Lake City, USA

  2. Name of institution: Technische Universitat, Institut fur Elektro und Biomedizinische Technik
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: Graz, AUSTRIA

  3. Name of institution: International Atomic Energy Agency (IAEA)
    Type of institution: International organization
    Type of cooperation: Joint publishing of scientific papers
    City: Beč, AUSTRIA
Other information about the project.
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