In this paper we study of the local atomic and electronic structure of nanostructured condensed material for rechargeable current sources on the basis of 15mas.%V2O5/Fe/LiF nanocomposite within charge-discharge cycle. Principle component analysis (PCA) of the series of Fe K-edge spectra collected during 1 st charge showing the concentrations of the components Fe, FeF2 and V[FeV]O4. We found the changes in the V oxidation state from the analysis of the experimental Fe K- and V K- XANES spectra. Total and partial density of states of components are presented.
Keywords: nanostructured materials for rechargeable current sources, dynamics of local atomic and electronic structures, XANES, DFT
The analysis of the operation of mining equipment in mines revealed inadequate level of efficiency of its use. In this regard, actual solution of scientific and technical problems aimed at improving the operational efficiency of mining equipment through the development of complex technical and economic measures to manage the system of exploitation, while ensuring the planned performance and the lowest cost to operate the equipment. The main directions of optimization of the system of exploitation of mining equipment, which is to solve the problems of improving the reliability of equipment, the appointment of a rational strategy of maintenance and repair, logistics mining enterprise, the definition of cost-effective resource and long service life through a combination of theoretical and experimental studies.
Keywords: mining equipment, system operation, reliability, technical condition diagnostics, logistics, optimization
The catalytic activity of Pt/C and PtxNi/C electrocatalysts prepared by borohydride methode was studed. It was established that the specific activity of fresh prepared Pt3,7Ni/C catalyst in oxygen electroreduction reaction is higher in compare with Pt/C material. After treatment of Pt3,7Ni/C material in the hot acid nickel in the surface layers of nanoparticles was dissolved and the composition of nanoparticles was changed to Pt5,6Ni. The electrochemical surface area of the Pt5,6Ni catalyst and specific activity was slightly decreased after corrosion treatment.
Keywords: platinum electrocatalysts, corrosion stability of the nanoparticles, fuel cells, X-ray diffraction, borohydride synthesis
The mathematical model of laser radiation thermal influence on biological structures is presented in this article.The optical and thermal parameters anisotropy of biological structures is considered in model. The surface cooling processes are described also with the convection and radiation. The software on the basis of numerical methods and the received model is developed. The simulation results of influence of two types of lasers (erbium (λ = 2,94 microns) and CO2 (λ= 10,6 microns) ) on the biological structure are given. This structure consists of enamel and a dentine.
Keywords: laser biotechnologies, numerical simulation, temperature field
The article deal with technological scheme of mandatory access control in the operation of MFIs in relation to the three main processes of microfinance: a preliminary contact with the customer on how to receive the micro-loans, micro-loans directly formulation and monitoring of the obligations of the parties (especially financial) to the contract. The above scheme is based on the international standard for the organization of the Open Systems Interconnection.
Keywords: mandatory policy, the MFI, access control, process, microfinance
Directions of innovative activity of commercial organizations to ensure its development in the competitive, volatile market environment are investigated.
Keywords: commercial organization, management, directions of innovative activity
The new way of multirate adaptation is considered. The main idea is the filter ability to change the order of the filter automaticaly by the appropriate algorithm.
The power on the filter output consists of two components. The first one is caused by the impulse response truncation, and the other is caused by weights fluctuations in the adaptive processing. More weights contribute more noise in adaptive signal processing. The result of adaptive procedure is the choice of the best filter orders in every channel of the multi-channel structure.
The main interest of this investigation is in the adaptation of the multirate adaptive filter with the flexible structural self-organization.
Due to the use of dynamical order adaptation procedure in the subbands, it is possible to reduce the total amount of the computational operations without quality reducing. Beside it, decreasing of the filter orders in the separate channel promotes considerable increase of the signal-to-noise ratio in the output signal. These statements are approved by experiments with the equalization problem.
Different results of the computer modeling are supplied with proper comments.
Keywords: adaptation, filter, multirate, signal, dynamical, order
Results of research of influence of processing operations of Nd:YAG of the laser are presented in article, such as the speed of scanning and power of a laser beam on maximum temperature and the thermodeformed status in structure dye-sensitized solar cell. Dependences a component of a tensor of tension are received at various processing operations by means of numerical experiment. Results of researches showed that in intense the deformed status is depend on temperature gradient more, then on coefficients of linear expansion of structure which in this structure differ slightly.
Keywords: laser technologies, thermodeformed, numerical simulation
The problems of building the architecture and design of the database structure for the storage of the structure of the chemical compounds and their analysis using heuristic algorithms
Proposed the structure of the database that allows you to store information about the structure of chemical compounds with varying degrees of detail. This approach simplifies forming of the structural descriptors used to build models of "structure-property" based on the genetic algorithms.
Keywords: database architecture, chemicals, data mining, heuristics
Information base of textile textures and materials, with the detailed description of the software for work with base is considered. It is told about methods of creation of base of textile textures and materials and about opportunities of the represented project.
Keywords: informatsionnno base, textile industry, texture, materials, visualization, software, graphics
The automated base 3DDT of textile textures and materials, with the detailed description of the software for work with base is considered. Market research of consumption of the represented project and program opportunities of alternative software products is carried out
Keywords: automated base, textile industry, texture, materials, visualization, software, graphics, 3D
The methods of forming information base of textile materials and textures, with a detailed description of the software for working with images. Describes the methods of creating the base of textile materials and textures.
Keywords: informatsionnno base, textile industry, texture, materials, visualization, software, graphics, scanning, photography
Modern CAD systems now allow automate most of the stages of design and technological preparation of production . But there is a number of routine procedures. This article is about the details classification operation analysys .
A review of existing solutions has shown that there are two ways to classify the details. The first - a “manual” characteristics of the classifier, assignment. This is the major method. The second is the expert system "Klassifikator" from the AsconCo., which is based only on the verbal description of the parts and the user selected one of parts from the existing. So that the function of user is to provide the recognition of images patterns. These methods of pattern recognition systems are successfully solve complex image recognition task . Analysis of methods of recognition led to the selection of the neural network method for classification of items.
We want you to use expert system consists of a Hamming neural network emulator and the semantic model of knowledge representation with direct output to solve the problem of classification of parts.
This combination of neuro-cybernetics and information approach to the creation of an expert system can either automatically determine a part characteristic by its image , or in a semi-automatic mode, prompting the missing information from user.
Keywords: expert system, pattern recognition, computer-aided design, neural network classification characteristic details.
This paper examines the effectiveness of the software framework developed by the authors for the task of sonar information systems software design. This is done by a theoretical estimate based on the data obtained during the actual production process, as well as practical by rebuilding the software using the skeleton. Fixed a set of indicators on which to judge the complexity and evaluated there . Finally, an assessment of the results of the experiment and draw conclusions about the direction of further research.
Keywords: software design, sonar information systems framework, performance evaluation
The main maintenance of a determination of strength and thermal properties of lightweight concrete on the basis of local raw materials by the Republic of Tajikistan constant linear heat source. The dependence of the thermal conductivity of wet concrete on its temperature as a linear function , differentiated by zones of positive and negative temperatures, which is the basis for calculating the probability of heat engineering structures using the test light concrete .
Keywords: Lightweight concrete, thermal conductivity, specific heat, humidity, temperature, probability figures, exterior walls, thermal calculation
Production lines for manufacturing of cylindrical logs for wood construction are considered in the article. Technological factors influencing on efficiency of production lines are identified and classified. Results of research can be basis for improving production lines.
Keywords: Woodworking, cylindering, technological line, wood costraction, factors
As a result of experimental observations and theoretical analysis revealed some heaven - mathematical model of the mechanism of the resulting impacts ( PMB ) , or the result of negative consequences from exposure to liquid, solid and gaseous waste production and life , and showed that the ecological condition and security of the region or individual land can and do have , in varying degrees, all or almost all of these wastes and their components. Currently, as the main source that impact on virtually all aspects of the environment and especially on health and longevity , is a non- satisfactory collection, recycling , disposal , use, and disposal of solid , liquid and gaseous waste , both in production and especially consumption (MSW) .
Developed and recommended the introduction of innovative methods and basic techno-logical scheme providing for decontamination, cleaning , processing and use of the liquid, gaseous and solid industrial and domestic waste and use of as waste itself and refined products. First of all: - a way of techno -logy and storage of solid waste in mines abandoned mines to produce fuel gas and humus product suitable for use as a fertilizer - how , technology and integrated circuit technology provides for joint decontamination, cleaning , processing and the use of liquid , gaseous and solid waste enterprises of light industry - the methods and technologies of waste disposal , mine and discharge groundwater liquidated bathrooms mines involving extraction and regeneration , in order to use different metals ( including iron) , which are in wastewater. The developed ITATION and recommended the introduction of major technological and innovative ways to take into consideration in this scheme , economic , environmental, social , technical and technological features of the enterprises and the region, including the problem of industrial safety . According to preliminary calculations, the payback period of the costs of implementation and development of methods and technologies developed will be from three to twelfth years.
Keywords: waste, liquid, solid, gaseous, impact, disposal, processing, use, environment
The article provides information about the regions of the Russian Federation, where the technology of preparation flatted grains for animal feed intensively implemented. The main foreign and domestic producers of grain flattening machine are considered, and also the technical characteristics, advantages and disadvantages of technical means in the Russian market of agricultural equipment are analyzed. The review describes grain flattening machine of the original design to meet the needs of private farming.
Keywords: flattening, grain flattening machine, breast, private farming, feed nutrients
The article is concerned with designing online identification algorithm for identification plunger model for wicket gate of Kaplan turbine adaptive control system. Algorithm is based on generalised recurrent least square method and invariant embedding method. Computer modeling using designed algorithm and using real experimental data shows that algorithm is effective.
Keywords: adaptive control system, diagnostic system, Kaplan turbine wicket gate, plunger, linearized models, identification, recurrent least square
The mixed finite element method has advantages over classical formulations of Lagrange and Castigliano, and ensures high precision and smoothness approximate solutions for strains and stresses.
In practice, using the mixed finite element method is limited by high size of linear equation systems, which leads to significant increasing time costs.
Using the orthogonal finite functions for approximating of unknowns leads to generation of sparse linear systems with a special structure.
That system can be simplified during solution.
This article proposes the algorithm of modificated Gaussian elimination for preliminary transformation an extended matrix of linear system.
This algorithm underlies software complex, which includes LISTSOLVER, the author's solver.
Confirmed the efficiency of created solver in compare with common-type solver.
Keywords: mixed finite element method, sparse linear systems, orthogonal finite functions, Gaussian elimination
Considered the proposed approach to the allocation of resource flows. The approach developed on the basis of the method of bee colonies. Experimentally determined the dependence of the error of the algorithm of the problem dimension. Shows the dependence of the distribution of resources from a number of iterations, and the power of the swarm, and dynamics approximation of the distribution to the optimum.
Keywords: optimization, distribution, collective adaptation, evolution, the error of the algorithm
We consider the significance of age and incremental Buravov in forest taxation. A review of the main results of research in the field of power cut wood. An analysis of research in the field of improving Buravov age. An analysis of research on the power of cutting wood for the work Buravov age. Based on the analysis given to the proposal to improve the age Boers.
Keywords: forest taxation, drill age, the coefficient of friction, speed, cutting wood.production
The paper discusses methods for the numerical simulation of the stress- strain state needed to evaluate the different boundary conditions of technical condition of long exploited surround impervious geotextile cover height adjustable fins . After a long period of operation of hydraulic structures continue to operate without routine repairs necessary to make the technical reconstruction of structures on the basis of innovation , as well as the previously proven technology of repair. The simulation result is characterized by the presence of non-hazardous for coverage of total movements , which shows the presence of a large margin of safety cover . It was also made modeling the formation of various defects, namely the most dangerous - subsidence of the underlying soil. Education deflection along the length of coverage shown in the orthographic total displacement of the drawdown of the subsoil . Was numerically simulated work covering the load of its own weight and volumetric filling the cells of soil under different parameters . One of the pressing problems at present in the field of security for a long time operated water conveyance structures is the correct assessment of the residual life .
Keywords: waterworks, water-conducting structures, numerical simulation, the stress-strain state
In this work the algorithm for compression and access to compressed voxel data in process of landscape modelling is proposed, which will significantly decrease memory requirements. This algorithm is designed to ease the development of vast voxel landscapes in computer simulations and games. The experimental studies has shown significant gain of voxel model memory efficiency. The aim of this algorithm is to be able to cooperate with surface extraction tools.
Keywords: compression, RLE, run-length encoding, voxel, landscape, virtual reality, operative memory, data
The article discusses one of the problems of modern software - hardware complexes for control of hydrounit hydroelectricity plant, namely the lack of an embedded system diagnostics of technical state of various hydrounit components . In work present an approach for the implementation of diagnostic systems of one of the most important parts electro - hydraulic actuator system to control the opening of the wicket gate. The diagnostic model and the basic control chart basic elements of electro-hydraulic converter , namely the main valve and servomotor .
Keywords: Gydroelectricity plant, hydrounit, diagnostics, modeling, control chart, electro - hydraulic actuator.