In operation the case when the radiant of an acoustic signal is in a composite cylindrical pipe is viewed. It is shown, that at transition of a pipe of one diameter in a pipe of other diameter, it is expedient to apply modal representation of an acoustic wave to each site of a pipe.

Keywords: acoustics, the control, diameter, waterpipe

  The article is devoted to the problem of the research of geopolitical processes on the world regions’ scale under present-day conditions. The article substantiates the necessity of their analysis with the help of the cognitive approach as an effective means of cognition of the interconnections and interrelationships within the complicated systems. With that aim in view the specifics and the stages of the cognitive modeling are given thorough analysis in the article. This type of modeling is adapted to the analysis of geopolitical dynamics on the regional/sub regional level taking into consideration its aptitudes to make prognostic scenarios of the development of the situation. The possibilities of the cognitive modeling of geopolitical processes are illustrated on the example of the situation in three sub regions constituting one (big) the Black Sea – Caspian region.

Keywords: World regions, geopolitical processes, modeling of the complicated systems, modeling of the geopolitical processes, cognitive modeling, the program’s system of the cognitive modeling, the Black Sea – Caspian Region, the Black Sea sub region, the Caucasus

Decision making in the organizational and technical systems is complicated by the risk of various events emergence in the systems with a given probability. The article describes a method for supporting decision making under risk on the basis of integration of evolutionary, multi-agent, simulation models and numerical methods. In the course of the method's work the following steps are performing: a set of alternatives solutions is formed;  transition to a one-criterion alternatives evaluation is fulfilled by using linear convolution; transition to the system behavior certainty is fulfilled with the use of numerical optimization Bayes-Laplace criterion. The developed method is applied to solving the projects scheduling problem; the results agree with the problem solution that has been performed by using genetic algorithm method under certainty.

Keywords: decision making risks, multi-agent modeling, numerical methods of decisions optimization, scheduling problem, evolutionary modeling

The rapidly growing information space combined area networks creates new needs for management, reporting, and especially in the search for data. On the first place there is the criterion of relevance, which allows for its correct use to increase the efficiency of information retrieval. There is a fairly large number of schemes and models for solving search problems, one of which is the BM25.

Keywords: genetic algorithm, information retrieval, modification BM25

  Article describes actual problems of personal navigation in portable scientific document set representation. Proposed algorithm for ranking document graph paths based on machine learning, described algorithm analysis and most probable navigation context parts.

Keywords: Document set navigation, machine learning, navigation context, scientific data visualization

  The main maintenance of a diversification of production as activity of subjects of managing is considered. being shown in purchase of the operating enterprises, the organizations of the new enterprises, redistribution of investments in interests of the organization and development of new production on available floor spaces. The most important organizational economic targets of a diversification of management are presented by innovative activity of the industrial enterprise.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

Structure of  surface acoustic waves(SAW) of CO sensor was developed. SAW sensor include transceiving IDT and catoptric IDT, which is loaded on the impedance of ZnO nanorods. Peak of reflection SAW from IDT clearly observed as result Fourier transformation of time function of pulsed response. IDT loaded on resistance paralleled ZnO nanorods, which depends on the concentration of CO.

Keywords: ZnO nanorods, device on SAW, CO sensor

The methodology, language and tools for rapid development of logic models of systems and processes are proposed. Language is defined in the first-order predicate calculus with equality and a representation of negatives, modules, discrete time intervals. The proposed computable mathematical semantics allows to construct interpreters whose complexity is O(nlogn) relative to the power of models. Interpretations result is a model derivated from the logical specification of objects by direct inference. The model can be used as a working prototype of the system. The technology is designed to address a wide range of problems of language analysis, projects, processes, development of training and expert systems.

Keywords: logical model, predicate calculus, logical mistakes, logical semantics, analysis, interpreter

The algorithm of determination durability parameters, loading and resource by means of analytical transition from selective data to population data is considered. The analysis of the executed calculations for this algorithm showed that receiving parameters of likelihood distribution for set on one casual sample is the confidant.

Keywords: Strength, loading, resource, analytical method, sample, populations.

  The paper covers the development of geometry-based skeletal animation algorithms for deforming 3D models. Linear Blend Skinning technique being widely used, much attention is given to the method description and its shortcomings. The paper gives wide coverage to the state of the art in geometry-based skeletal animation algorithms. 

Keywords: skeletal animation, skinning, geometry-based algorithms, character animation

A study of the accuracy of the determination of corrections into the distances, measured by radio-electronic systems, is executed for moist component of refractive index. The original formulas of the determination of corrections for moist component into the inclined distances are obtained.

Keywords: Atmosphere, Refractive index, Moist constituting, Correction into the distance

This article proves that the parameter that determines the energy the washing process is G-factor. The authors propose a mathematical tool defining dependencies technical performance of G-factor. It is an indicator of the effectiveness of the optimization of technical solutions of embodiment washing-squeezing machines and the basis for the fundamental analysis of typical designs.

Keywords: washing-squeezing machines, mathematical modeling, G-factor, energy efficiency, optimization solutions.

Performed calculations of angles of the astronomical refraction in different ways and made a comparative analysis of the results of a calculation. Provides recommendations for the use of any means in different contexts.

Keywords: Astronomical refraction, the Hour angle, Anti-aircraft distance, atmosphere, Pulkovo table.

  The simulating applications are considered when mobile bloodflow monitor designing. Doppler techniques simulating, circuitry simulating and insonation object modeling are presented. The results of simulation are approved during experiments, and results of modeling are applied when receiving and transmitting path of mobile bloodflow monitor testing and piezotransducer parameters experimental estimating.

Keywords: Simulating, mobile bloodflow monitor, Doppler techniques simulating, circuitry simulating, insonation object model

Combined method which allows analyzing parameters of the nanoscale atomic and electronic structure of materials relying on three different methods (x-ray absorption spectroscopy (XAFS), x-ray diffraction (XRD) and Raman spectroscopy) was developed. The method was applied for the study of nickel oxide nanoparticles, which serve as an efficient catalyst for the artificial photosynthesis process. 

Keywords: solar energy, artificial photosynthesis, NiO, Raman, x-ray diffraction, XAFS