Tomasz Zyska

Algorithm of parallel: hierarchical transformation and its implementation on FPGA

In this paper considers the algorithm of laser beam spots image classification in atmospheric-optical transmission systems. It discusses the need for images filtering using adaptive methods, using, for example, parallel-hierarchical networks. The article also highlights the need to create high-speed memory devices for such networks. Implementation and simulation results of the developed method based on the PLD are demonstrated, which shows that the presented method gives 15-20% better prediction results than similar methods.

Deterministic chaos in RL-diode circuits and its application in metrology

The paper investigated the possibility of measuring the resistive physical quantity generator using deterministic chaos based RL-diode circuit. A generalized structure of the measuring device using a deterministic chaos signal generator. To separate the useful component of the measurement signal of amplitude detector is proposed to use. Mathematical modeling of the RL-diode circuit, which showed a significant effect of the barrier and diffusion capacity of the diode on the occurrence of deterministic chaotic oscillations in this circuit. It is shown that this type deterministic chaos signal generator has a high sensitivity to a change in output voltage resistance in the range of 250 Ohms, which can be used to create the measuring devices based on it.

Noncontact method of temperature measurement based on the phenomenon of the luminophor temperature decreasing

In the paper is suggested new noncontact method of temperature measurement based on the phenomenon of the luminophor temperature decreasing, is developed the construction of the primary measurement transformer, that implements suggested method, and got its transformation equation.

Functionally integrated sensors of thermal quantities based on optocoupler

The concept of constructing functionally integrated sensors of thermal quantities is formulated on the basis of calorimetric methods of investigation, the novelty of which is the usage of components of solid-state microelectronics and multifunctional signal converters. The analysis and selection of organic materials has been carried out, and the green colored OLED has been formed with good output characteristics for temperature sensors. The spectral analysis of proposed structures is represented and the method of their obtaining is selected.

Microelectronic frequency transducers of magnetic field with Hall elements

The analysis is carried out and the possibility of creation of microelectronic auto generator transducers of magnetic field on the basis of transistor structures with a negative resistance is shown. Characteristics of microelectronic auto generator transducers of magnetic field with Halls elements with the broad range of frequencies from 103 to 107 Hz are offered and investigated, at the same time the sensitivity of devices changes from 103 kHz/mT up to 105 kHz/mT.

New ultrasound approaches to measuring material parameters

New approaches to ultrasonic measurements based on the use of the ultrasonic near-field zone and the resonance method are considered. the approaches can be used to measure such material parameters as density, thickness and humidity. simulation and obtained experimental results are given. a mathematical model of the ultrasonic resonance method for measuring material parameters is presented. shown simulation results and experimental data exhibit the high convergence which indicates the adequacy of the proposed model and allows offering a new class of ultrasonic methods for measuring control. a new approach to ultrasonic measurements based on the creation of ultrasonic wave selfoscillation conditions is proposed.

The technology of searching the associative rules while developing the software

It is shown that there are not enough productive methods that can help project managers to create and choose the effective strategies of organizing software development process. By using designed algorithm and mathematical model its possible to find associative rules that are informative and can help project managers with forming effective process of creating software.

Thermoelectric properties of SiGe whiskers with various morphology

Thermoelectric properties of Si1-xGex (x = 0.03) solid solution whiskers doped with B impurities to the concentrations 1017 – 1019 cm-3 were studied in temperature range 300 - 420K. An influence of the whisker morphology, in particular their diameters and obliquity, on Seebeck coefficient, thermal conductivity and resistance was investigated. Seebeck coefficient and resistance was shown to increase, while thermal conductivity to decrease when the whisker diameter drops from 100 to 10μm, that is accompanied by a rise of figure of merit (up to 0,12 at 300K). Use of the whiskers with large obliquity leads to a small rise (of about 10 – 15%) increase of their Seebeck coefficient.

Research of a filter on the parallel contour on L-, C-negatrons

In the paper a filter on the parallel resonant circuit on L-, C-negatrons is suggested. The parallel resonant circuit on L-, C-negatrons is investigated. Stability of the contour and frequency characteristics are considered. Experimental researches of the contour on the circuitry analogues of negatrons are conducted. Use of L-, C-negatrons improves the frequency-selective properties of the filter. Simulation of the filter on circuitry analogues of L-, C-negatrons on operational amplifiers LF400C is done. The simulation results showed improvement of frequency selectivity of the filter characteristics by reducing the phase distortion.

Frequency pressure transducer with a sensitivity of mem capacitor on the basis of transistor structure with negative resistance

In the article the pressure transducer with frequency output based on the structure of the bipolar-field transistors with negative resistance and tenso sensitive MEMS capacitor has been considered. A mathematical model of the frequency pressure transducer in dynamic regime has been developed that allowed to determine the voltage or current in the circuit at any given moment in time when acting this pressure. Analytical expressions of the conversion function and sensitivity equation has been received. The sensitivity of the developed device is between 0,95kHz/kPa to 1,65kHz/kPa.