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Moscow, Russia

Dvorkovich V.P.,Bauman University | Dvorkovich A.V.,Moscow Power Engineering Institute
Communications in Computer and Information Science | Year: 2014

Implementation of digital broadcasting systems requires the solution of a set of problems, including national and international standardization, advances in video and channel coding, measurement methods and equipment for broadcasting systems. Different systems could be effective for highly populated and sparsely inhabited regions. New digital terrestrial multimedia broadcasting system may solve such problems. Some key characteristics of the RAVIS system are presented and the prospects of the system are discussed. © Springer International Publishing Switzerland 2014. Source

Semenov I.E.,Bauman University
Water and Ecology | Year: 2014

Nowadays humanity has to admit that there is an acute lack of fresh water in the Earth. This lack becomes one of the main factors which hinder development of civilization in many parts of the world. The article presents the investigation results on obstacles that occur on the way of creation and implementation of such prospective methods of water production as fresh water production from the atmosphere air. The birth of the idea of the generator and description of implementation and researches carried out in different periods are presented. It is shown that the main problem of condensing generator efficient work is the active heating of the condensing surface and necessity to cool it. The author's test data by which unit capacity for Moscow city conditions makes about 0,56 l/h from the square meter of condensing surface is presented. Prospectivity and high efficiency of the method is displayed. Source

Tatarnikov O.V.,Plekhanov University of Economics | Karpenkov K.S.,Bauman University
IOP Conference Series: Materials Science and Engineering | Year: 2015

An approach to definition of a homogeneous simulation model for honeycomb structures has been developed and verified for specimens containing a finite number of cells. The elastic characteristics of the model were evaluated basing on the results of tensile and shear numerical tests of honeycomb specimen. This is an extension of earlier work related with spatially reinforced composites. The simulation model was validated for specimens comprised of different numbers of cells in the specimen to expose the scale effect influence. As the number of cells was increased, the calculated values of the moduli Ex and Ey converged, confirming the theoretical result that the appropriate model is transversely isotropic rather than orthotropic for the honeycomb specimen investigated. Elastic properties obtained from the numerical test of the honeycomb structure were then applied in the characterization of continuous medium. The examination was carried out using criteria expressing basic features of homogeneous body. The case of a honeycomb integrated with composite plates as a sandwich structure was analysed for a complex loading case as well as buckling and eigen- frequency analysis. Source

Chivel Y.,MerPhotonics | Chivel Y.,Pulsed Technologies Corporation Ltd. | Bochkov V.,Pulsed Technologies Corporation Ltd. | Gryshin Y.,Bauman University | And 2 more authors.
Proceedings of the 2012 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2012 | Year: 2012

A new atmospheric electromagnetic plasmadynamic system, pulsed-periodic plasmatron, operating at standard atmospheric pressure with high frequency has been developed. In this system plasma flow velocity reaches 3-5·10 3 m/s with temperature up to 15·103 K. The results are presented on the use of the pulsed-periodic plasmatron for surface layer modification and particles acceleration. © 2012 IEEE. Source

Komkov M.A.,Bauman University | Moiseev V.A.,Compomash TEK | Tarasov V.A.,Bauman University | Timofeev M.P.,Bauman University
Izvestiya - Atmospheric and Ocean Physics | Year: 2015

Some ecological problems related to heavy-oil extraction and ways for minimizing the negative impacts of this process on the biosphere are discussed. The ecological hazard of, for example, frequently used multistage hydraulic fracturing of formation is noted and the advantages and perspectives of superheated steam injection are considered. Steam generators of a new type and ecologically clean and costeffective insulating for tubing pipes (TPs) are necessary to develop the superheated steam injection method. The article is devoted to solving one of the most important and urgent tasks, i.e., the development and usage of lightweight, nonflammable, environmentally safe, and cost-effective insulating materials. It is shown that, for tubing shielding operating at temperatures up to 420°C, the most effective thermal insulation is a highly porous material based on basalt fiber. The process of filtration deposition of short basalt fibers with a bunch of alumina thermal insulation tubing pipe coatings in the form of cylinders and cylindrical shells from liquid pulp is substantiated. Based on the thermophysical characteristics of basalt fibers and on the technological features of manufacturing highly porous coating insulation, the thickness of a tubing pipe is determined. During the prolonged pumping of the air at an operating temperature of 400°C in the model sample of tubing pipes with insulation and a protective layer, we find that the surface temperature of the thermal barrier coating does not exceed 60°C. Introducing the described technology will considerably reduce the negative impact of heavy-oil extraction on the biosphere. © 2015, Pleiades Publishing, Ltd. Source

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