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
We have carried out the analysis on the scientific and technological literature on methods of calculation and analysis of the x-ray diffraction, x-ray absorption and Raman spectra used to analyse the structure of the materials for hydrogen storage under realistic operating conditions. The simulations were carried out for the series of small palladium nanoclusters with embedded hydrogen. Multiscale computer modelling was used to simulate the dynamics of structure of the materials during charge/discharge phases.
Keywords: hydrogen storage, XANES, x-ray diffraction, Raman scattering, fuel cell
The importance of domestic competitive machinery market entry is shown in the paper. It is shown that the domestic competitive machinery, which provides complex harvesting of round and fuel wood, market entry is the important direction in solving the problem of wood consumers market development in the capacity of biological fuel.
Keywords: wood fuel, preparation, consumers, market
The proposed approach to the study of social engineering systems to meet all their basic features. Blurred structure of social engineering system reflects the fuzzy cognitive model; Fuzzy connection effectively evaluated using weights Fishburne; "blur" element values system and its functioning is overcome by introducing linguistic variables and their term-set fuzzy classifiers.
Keywords: system analysis, poorly structured and poorly formalizable processes, sociotechnical systems, fuzzy cognitive modeling
Examines the historical stages in the development of the theory of systems research management of the uncertainties, the reasons for they arise in the mathematical model, this is reflected in an interval values in the transfer function of the object of control. It is proposed algorithm for obtaining experimentally the interval of values.
Keywords: interval values, robust stability, the transfer function, parametric uncertainty, a mathematical model of the management system
When using the prediction in the control of the rotational motion is necessary to construct two smooth trajectories passing through the previously measured its nodal points. As a piecewise polynomial curve that provides the desired smoothness, consider interpolating cubic splines, which are between nodes represent a cubic parabola, continuously connecting the nodes with the smoothness of degree 2. In imposing additional boundary conditions, these splines minimize its total curvature.
Keywords: Interpolation splines, management tasks, prediction algorithms, kinematic characteristics, Hermit splines
The article describes the best ways spline interpolation trajectories of angular movement in the key points for solving motion control rd to the prediction of the external load. As benchmarks we examine the accuracy of the approximation of the drive and the complexity of calculation of coefficients of splines.
Keywords: Trajectory, Lagrange splines, splines Ferguson, interpolation
In this paper the mathematical model of automatic positional hydrodrive of actuators machines with hydraulic control circuit of high efficiency original design. The model is formed with a view of the developed structure of the hydraulic drive and control system comprises three subsystems: a mechanical, hydraulic and control. Using the software package Matlab 2012 investigated position loop is characteristic of the rotary mechanism for the technological equipment according to the criteria of speed and accuracy.
Keywords: mathematical modeling, position hydrodrive, the control of unit, accuracy, high-speed performance
In this article considered the questions related to how the deformability is influenced in concrete beams, in which steel reinforcement replaced with fiberglass GFRP or a combination (hybrid). The latter is very important, as the current standards do not account the increased in strength of composite reinforcement, whereas its elasticity modulus is lower than the elasticity modulus of steel reinforcement.
Keywords: concrete, reinforced concrete, strength, deformability, steel, fiberglass reinforcement GFRP, composite, the modulus of elasticity, deflection
In article questions of improvement of a technique and theoretical bases of electrocatching with reference to problems of fight against drop ablation in a working zone in the conditions of galvanic production are considered.
Keywords: electrocatching, drop ablation, working zone, barbotage, charge, drop
Currently actively promote seismic associated with the use of special devices, so-called energopoglotiteley. Are very effective konstrutsii energopoglotiteley in which the working element undergoes torsional strain. These EPA have the maximum energy absorption with minimal weight.
Keywords: Earthquake protection, energy absorption, the diagram of deformation, plastic deformation, plastic torsion
In this paper for the solution of the transformation "voltage-to-pulse" is proposed implemented in CMOS basis (technical process SGB25VD) structure based on high-frequency converter and comparator multiplexer with symmetrical hysteresis. Increasing the accuracy of the transformation achieved by the proposed method switching input voltages, excluding the through-analog switches. The results of computer simulation confirmed the effectiveness of the developed structure. Practical implementation of an analog-to-digital converter has shown that the proposed method of construction reduces the technological requirements for the components of the system-on-chip and increase its productivity.
Keywords: system-on-chip, analog-to-digital converter, structure, multiplexer, switching, measurement error, comparator, integrator
The article describes such categories of psychotherapeutic discourse as its participants, aims, values, specific concepts. Special attention is given to the means of the categories’ expression in the language. The authors name so called teleonomic concepts of the psychotherapeutic discourse (life – death), discourse –specific concept relationship is also in focus. It is noted that psychotherapeutic discourse is of a metaphorical nature.
Keywords: psychotherapeutic discourse, discourse participants, relationship, discourse metaphorical nature
Represented in the block diagram of the election based amplifier and current amplifier input converter "voltage-current" allows you to control the central processing element pole frequency and quality factor, as in diagnostic mode parameters of analog devices, and in the mode signal processing. A variant of its circuitry implementation bipolar transistors for microelectronic performance. The results of computer simulation in Agilent ADS confirmed that on the basis of simple current amplifier in the traditional process, due to the structural features of the active elements of ongoing basic level of order can be implemented relatively high-Q units of the second order, which are easily integrated into multi-tier band filters.
Keywords: system-on-chip, band pass filter, quality, current amplifier, the sensitivity, measurement error
The paper offers a solution to the general problem of circuit synthesis for n-MOS transistor level band pass filter based on current amplifier with a limited transmission coefficient. The possibility of optimal choice of the parametric compromise. The results of modeling circuit in Cadence Virtuoso environment component-based workflow SGB25VD.
Keywords: CMOS transistor, a band pass filter, a selective amplifier, system on chip, gain, voltage-to-current