×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • Deposition of TiO2 thin film by spin-coating using a laser annealing

    TiO2 thin films are widely used as a transparent layer n-type conductivity in the perovskite solar cells. Nanocrystalline TiO2 films were deposited on the surface of glass substrates coated with tin oxide with fluorine (FTO) by spin-coating and subsequent laser annealing radiation with a wavelength of 1064 nm. The effect of laser annealing on grain size in the TiO2 film and spin-coating speeds on its thickness. It is found that the grain diameter in the resulting TiO2 films on average 17-64 nm at a power of laser annealing 30-70 W. It was found that the thickness of the TiO2 film is changed in the range of 72-124 nm spin-coating speed. Optimal parameters TiO2 thin film formed by laser annealing can enhance the efficiency of the perovskite solar cell.

    Keywords: thin film, TiO2, centrifugation, laser annealing, surface morphology, thickness

  • Opportunities for the effective solution of technical-economic engineering problems during planning and optimization of wood transportation

    The developed calculation dependencies for determining the log truck movement indicators during non-steady and steady motion in different modes make it possible to solve technical-economic tasks with adequate accuracy and certainty during planning and optimization of wood transportation. During two-stage timber hauling a log truck based on MAZ-6312B9 has advantages in exploitation and technical-economic indicators in comparison with a log truck based on Scania R-420. There are opportunities for a rapid increase of passing ability of a log truck while using an active trailer. This provides the work of a complete log truck on a forest road, and also there is a possibility to eliminate two-stage timber hauling, with rise of efficiency and technical-economic indicators

    Keywords: wood transport, optimization, log trucks, motion simulation, efficiency

  • Effect of mechanical activation conditions on the particle size distribution and microstructure of industrial PZT-19 material

    The influence of mechanical activation conditions on the the sintering temperature, grain size and microstructure of PZT-19 ceramics was established. It was found that the mechanical activation method allows to increase the uniformity of ceramics grains.

    Keywords: ferroelectrics, particle size distribution, green building, mechanical activation, PZT

  • Study of spectrophotometric characteristics of glass-coating

    Produced synthesis steklomatrits to make white glass-ceramic enamel coatings for steel products with various color shades in the system R2O-RO-B2O3-Al2O3-SiO2-TiO2-P2O5-F- and investigated their spectrophotometric properties. We describe the basic features of different models of determining the color characteristics of the resulting coatings and choose the best for the objective of determining the parameters of color shades of white glass-ceramic enamel coatings for steel products.

    Keywords: glass-ceramic enamel coating, protective coating for steel products, corrosion protection, spectrophotometric characteristics, color shades, whiteness, brightness, color models

  • Simulation of the design activity diversification of innovative enterprise

    Nanocrystalline TiO2 films are used as transparent layer n-type conductivity in the perovskite solar cells. The work presents the numerical diffusion-drift modeling of the transport processes and the accumulation of charge carriers in the heterostructure of TiO2 / perovskite / p-type semiconductor. The basis of the simulation put stationary physical and topological model based on drift-diffusion equations and semiconductor system allowing to model perovskite solar cells with a variety of electro-technological and constructive parameters. Obtained photovoltaic solar cell characteristics and plotted the efficiency of the TiO2 film thickness. The optimal thickness of the TiO2 film is 50-100 nm, thereby increasing the perovskite solar cell efficiency.

    Keywords: Solar cell, thin film, titanium dioxide, p-i-n structure, numerical modeling

  • Tolerance factor for hexagonal RMnO3 structures

    For hexagonal structures RMnO3, where R - rare earth ions are Er, Tm, Yb, Lu, and Y entered anisotropic relative tolerance factor tx / tz. A correlation tx / tz with changes spontaneous polarization (strain) on the temperature and pressure, with a lattice parameter changes from the radii R ion concentration and changes in the structural parameters of R1-xAxMnO3 (A - Ca, La) solid solutions. It is shown that an increase in the Neel temperature TN corresponds to a decrease in tx / tz, with an increase tx / tz external pressure - increased temperature phase transitions in structures RMnO3 and concentration phase transitions Y1-xAxMnO3 (A - Ca, La) correspond to abrupt changes in tx / tz.

    Keywords: tolerance factor, hexagonal ABO3 structure, chemical composition, temperature, pressure, solid solution

  • Ignitability and smoking capability of epoxy composite materials Part 1

    Interference of mineral fillers, phosphor and chloride contained plasticizes, bromine contained fireproofing compounds and ferrocene derivatives to thermal stability, ignitability and smoking capability of epoxy composite materials was under consideration. The authors have eliminated that the phosphate plasticizes do not affect practically to epoxy polymers' combustibility, but to reduce smoking capability of composites. Different types of mineral fillers by concentration less then 45% by mass do insignificantly affect ignitability of epoxy composites. Different types of aromatic bromine contained additive fireproofing compounds do not affect to combustibility of such composites. The ferrocene derivatives surpass the ferrocene by effectiveness of smoke redesign. Correlation of the oxygen index with limiting oxygen concentration, heat of burring and critical density of heat flow graph was shown up. The main service properties and the data of inflammability of original patented composites are presented.

    Keywords: bromine contained fireproofing compound; ignitability; combustibility; smoke ability; composites; fillers; plasticizes; ferrocene derivatives; epoxy oligomers

  • PHIL simulation of multifunctional modular systems. Conditions for choosing a model

    In the article possibilities and elements for PHIL simulation of multifunctional modular systems (MFMS) are considered. For this purpose, mathematical studies of such systems were carried out, the tasks of their basic elements were singled out, and the main task was to create a universal modular model. The structure of the energy MFMS and its problems from the position of graph theory are determined. The analysis of the existing methods of PHIL simulation is presented, as well as the structure of the simulated fragment of the system at the junction of the two modules is defined with using the "coupling" method of the scheme. As a result, conclusions were drawn about the possibility of applying a PHIL simulation to the MFMS.

    Keywords: PHIL simulation, modular systems, macro task, power hardware-in-the-loop simulation, analog-digital system, numerical part, analog part, Gauss-Seidel method, Jacobi method

  • Computational experiments for the study of radiation and thermal fields in biological tissues

    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: mathematical modeling, numerical methods, biological tissues, oncology, microwave radiothermometry, heat transfer, radiation fields

  • Investigation of the influence of presowing microwave effect on the morphological parameters of germinating seeds of spring wheat

    The purpose of this study is to obtain the best regimes of presowing treatment of spring wheat seeds by the electromagnetic field of the microwave range, as a result of which a significant increase in the morphophysiological indices of their seedlings and, as a result, an increase in the yield of this crop.

    Keywords: Microwave radiation, presowing treatment, radiation dose, seeds, yield, morphophysiological indicator, spring wheat

  • Calculation of nonstationary temperature fields of a composite design

    Is considered a two-dimensional finite element analysis of unsteady thermal regime is made of heterogeneous layers of composite construction. The degree of influence of individual geometric design changes on the character of distribution of temperature on its volume. Heat is produced from internal volumetric sources of heat, removal of heat from the outer surface by convection. The calculation of the temperature field using two-dimensional heat conduction equation (Fourier equation)

    Keywords: numerical calculation, finite element, heat conduction, convection, Fourier equation, temperature field, layer, plate, heterogeneity, design

  • Analysis of the deciphering process in the construction of highways

    The systems for collecting, processing, recording, and using certain data are quite a huge system and have a special part - remote sensing materials. With the correct organization of the system of remote observation, it is important that it be oriented to

    Keywords: Decoding, pictures, space carriers, objects, roads, construction, measurement of parameters, boundaries, space, painting

  • Measuring and diagnostic complex for vibroacoustic control of technical condition of the equipment

    Based on stm32discovery kit was designed device for vibro-acoustic control. For receive of vibro-acoustic signal used piezoelectric accelerometer, which connected to ADC of microcontroller stm32f4vgt6. For Processing data use personal computer with software, which was developed in visual programming language LabVIEW Data from microcontroller to personal computer transmitter with use USB to UART. Culling depend from results of comparison, reference spectrum and current spectrum by values of the correlation coefficient

    Keywords: STM32F4 Discovery, ADC, VISA Serial, LabVIEW, adapter USB to UART, vibro-acoustic control, spectrum, reference, signal processing, correlation coefficient

  • Research of influence of parameters of triangulation in the environment of the programmatic complex SAPPHIRE on the results of calculation.

    Modern programmatic complexes, supporting BIM technologies, allow in the automatic mode to carry out a transition from the 3d-модели of building to the model analytical, and then to the calculation certainly to the element model of building, the calculation of that is conducted with the use of programmatic complexes being based on the use of method of eventual elements. The results of calculation of different variants of the net of eventual elements, generated by facilities of the programmatic complex SAPPHIRE, are considered in the article. As a model for a calculable experiment the fragment of monolithic multistory girderless framework is accepted. The knot of leaning of flag on a column was designed both with the use of absolutely hard body and without him. The step of triangulation was varied in limits a from 1/35 to 1/5 span. The article of analysis is choose the area of lower longitudinal armature along the axis "Х" in the middle of flight. It is set that not dependency upon a type and step of triangulation the use of absolutely hard bodies conduces to the decline of the armature required by a calculation on the average it is Also certain on 6 %., that type and step the triangulations used in the programmatic complex SAPPHIRE substantial influence on the result of selection of flight armature do not render. However it is necessary to take into account that this result is got for charts in that obligatory is eventual elements, the centres of gravity of that are situated in the middle of flight, to what it is needed to aim in the process of creation of computer model of building.

    Keywords:

  • Intellectualization of the software of processing spatial data based on the ontology

    This article is about intellectualization of the software of processing spatial data. Solution of this problem based on using the ontology approach. Next tasks were solved to achieve the goal: to consider the analysis of the subject area, to create the ontology of considered subject area, to develop an algorithm of creating and integrating the ontology to the software of processing spatial data. This algorithm is allows to integrate spatial data from different storages. Also the structure of the ontology is considered in this article: what components are included in the ontology and how could we create it. The software Protégé is chosen from existing editors to create and edit the ontology.

    Keywords: ontology, intellectualization, geoinformation system, search, semantic web, software