To study complex sonar systems, the method of decomposition was suggested. The peculiarities of the method applied to the sonar systems were considered. A four-level hierarchy of decomposition subsystems is proposed. A scheme of the first level of semantic decomposition was presented. Controlled modules allowed to build adaptive systems were described.

Keywords: decomposition, hydro speaker systems, hierarchy of subsystems

Based on a previously developed system of environmental monitoring experimental studies of the dynamics of heavy metal concentrations in surface water in the Taganrog Bay of the Azov Sea were carried out. Sampling points were determined. Data processing for the heavy metals such as iron, copper, molybdenum, nickel, lead, chromium was provided. Observation period - 10 years. Trends have been defined for each point of observation.

Keywords: experimental data, dynamics of concentration of heavy metals

Information about authors of issue №1 (2013)

Keywords: authors

Based on a previously developed system of environmental monitoring experimental studies of the dynamics of heavy metal concentrations in sediments in the Taganrog Bay of the Azov Sea were carried out. Sampling points were determined. Data processing for the heavy metals such as iron, copper, molybdenum, nickel, lead, chromium was provided. Observation period - 10 years. Trends have been defined for each point of observation.

Keywords: pilot studies, dynamics of concentration of heavy metals, pollution of waters, ground deposits

  Now nanotechnologies are one of perspective methods of diagnostics in medical practice. Nanoparticles can be used as contrast agents for medical ultrasonic introscopy due to their adhesion to tumor cells and bacteria. The mathematical model of the laser excitation of acoustic signals in a liquid medium with the presence of the nanotubes was developed and numerically studied. Increasing of the level of photo acoustic signal was shown.

Keywords: Opt acoustic effect, nanotubes, and model

  For the previously proposed microphone system with adaptive control algorithm was investigated directional characteristic accuracy of the determination the angle of the sound source. The dependences of the absolute deviation on the angle of signal arrival of the sound source, defined by the spread of sensitivities directional microphone system were received.

Keywords: adaptive algorithm, microphone system, accuracy of localization, control characteristic orientation, directional microphone, space-time processing

  The paper discusses the features of their own circuits and mutual compensation circuitry in a differential stage in CMOS transistors. It is shown that their composition can significantly increase the differential gain in symmetric cascades with a dynamic load, significantly reduce common mode gain and extend the range of operating frequencies. As an example, the evolution of the basic concept of a symmetric stage and the results of its simulation in Cadence Virtuoso.

Keywords: micro circuitry, structural synthesis, complex-function blocks, a differential stage, a CMOS transistor, system-on-chip

  The paper discusses architecture of stabilizers, which realize the effect of own noise compensation of reference voltage. Circuits with own compensation of noise allow to reduce the noise in comparison with the classical circuits at a small values of the correction capacitor. A mathematical analysis of the proposed circuit is given. The results are confirmed by computer simulation in Cadence using transistors model of 0.6 um BiCMOS process technology.

Keywords: voltage stabilizer, noise, system on chip, BiCMOS technology, computer modeling, proper compensation

  The paper presents a functional diagram multidifferential operational amplifier, which in contrast to conventional operational amplifiers, has some inverting and non-inverting inputs, and provides a relatively high input voltage limit. Application of basic common-mode feedback signal allowed increasing CMRR voltage on both channels. The use of additional passive components in the emitter circuit of the multidifferential cascade possible to increase the voltage limit of the operational amplifier, the rate of increase of its output voltage to provide high accuracy ratio of the transmission channel and to improve the stability of the corresponding parameters of measuring devices based on multidifferential operational amplifier.

Keywords: system-on-chip, input stage, radiation, amplifier, analog-to-digital converter, bipolar transistor, field transistor

Information about authors of issue №4 p.1 (2012)

Keywords: authors

Showing the use of clustering of business processes of industrial enterprise in the mechanism of adaptation processes and identified prototypes for each of obtained clusters. The proposed approach reduces the analysis of the processes and their implementation, which contributes to efficient operation of the mechanism of adaptation process under the order in the information environment.

Keywords:

Information about authors of issue №4 (2011)

Keywords: authors