A brief review of the traditional drift-spectrometry methods has been given: time-of-flight ionic mobility spectrometry, ionic mobility incrementation spectrometry, tandem drift-spectrometry of various modifications.Well-known information on surface-ionized drift-spectrometry has been given from the related papers and this method main trends advantages comparing with the available ones have been formulated.

In this paper, the acoustic microscope with a linear ultrasonic array and a cylindrical lens has been proposed in order to carry out quantitative characterization of layered regions of the sample under research. The determination method based on recording the microscope array spatio-temporal signal of the layer thickness and velocities of the longitudinal and transverse waves in the layer material has been developed. By using a test sample, it was shown that the error of measurement is about 1 % for both the thickness and the velocity of the longitudinal wave, and it is 3 % for the velocity of the transverse wave.

The analysis of the products reliability during the exploitation by testing two simple hypotheses about the value of the Weibull distribution shape parameter using the optimal sequential statistical criteria is proposed. The following sequential criteria are examined: the sequential probability ratio test (Wald criterion - SPRT), the optimal generalized sequential test (Aivazyan criterion), double sequential probability ratio test (Lorden criterion - 2-SPRT), the sequential test with parabolic boundaries (Grodzenskiy criterion). Mathematical formulas necessary for the application of these sequential criteria in practice are shown. The effectiveness of the criteria is compared by the method of the statistical modeling.

The article suggests a method for estimation of the sensitivity of software tests to transient faults of a computer system. The method is based on statistical analysis of a program work results after performing a functional test with a submitted short term (ransient) defect, This method allows to identify tests helping to localize errors both in a program body and in its environment. It also enables to estimate the level of a program fault tolerance. In order to analyze quantitatively the sensitivity, we suggest a notion of test sensitivity rate regarding the transient faults. Examples of estimation of the sensitivity of software tests are given as well as methods of time cost reducing for the test sensitivity rate estimation.

Memory access delay has been a major influence on microprocessor systems performance recently. On-chip cache memory application dramatically reduces this delay. Cache prefetching method is one of the basic ones to give the most effective use of memory cache. In the present study we analyze the effect of one of the types of prefetching, especially, the Markov one, on the whole microprocessor-based system performance. The results obtained make it possible to come up with recommendations for the choice of Markov prefetcher parameters setting for both computationally intensive task and data-rich applications.

The effects of "superfast scanning beam" and synthesis of "short" (broadband) signal in the radiation field of the antenna array, excited by mutually orthogonal coherent narrowband signals are under consideration. Researches and modeling are carried out for simple and complex probe signals of MIMO radar. Their orthogonality is provided in the frequency domain due to the separation of the central frequency of their spectra. It is shown that this approach based on MIMO radar technology, with a certain choice of signals parameters and array, allows to overcome the limitations on the width of the signal bandwidth for phased an-tenna array of traditional construction.

The article describes the quasioptimal algorithm of filtering slow-moving object coordinates when measuring them by two-position range measurement radar. Relations that allow to model this process of coordinate measurement are given.

The article deals with universal systems on the basis of primitive functions for approximating pulse signals of different types and duration and providing simple mathematical formulation as well. Power, polynomial-cosinusoidal, exponential-multinomial, linear fractional, B-spline signal systems and restricted spectrum systems have been presented. The expressions for spectral and correlation characteristics of the signal systems mentioned have been obtained. Based on the analyzed signals models a multifunctional plug-in software module “Signals Library” has been developed. The module interface is designed for module private use (for example, as a computer reference guide) or for the external program application, for example, as a window to provide a signal type and signal parameters setting selection for users. The examples of the results obtained using the programs above mentioned as well as Signals Library module graphical presentation have been represented in the article .A matter of choice of this or that functions system can be determined by specifics of the task to be solved.