Theory of enhancement of thermoelectric properties of materials with nanoinclusions

Based on the concept of band bending at metal/semiconductor interfaces as an energy filter for electrons, we present a theory for the enhancement of the thermoelectric properties of semiconductor materials with metallic nanoinclusions. We show that the Seebeck coefficient can be significantly increased due to a strongly energy-dependent electronic scattering time. By including phonon scattering, we find that the enhancement of ZT due to electron scattering is important for high doping, while at low doping it is primarily due to a decrease in the phonon thermal conductivity

Simulation of production processes at aircraft building enterprises

The effective development of productive capacities of the domestic aircraft industry was analyzed. A methodology for calculating general indicators for assessing the feasibility of production programs of the aviation industry at the level of technological limits and types of aircraft manufacturing was developed. The application of this methodology will allow making more meaningful determination of the material consumption of new types of aviation products and the productivity of new equipment and ultimately assessing the feasibility of prospective production plans. Monitoring of the performance indicators of the domestic aircraft industry will give new impetus to research in the sphere of development, production and maintenance of science-intensive products according to their specificity. Despite the great value of scientific studies of the works of many scientists in the sphere of organization of production at enterprises, there are currently unresolved issues of an industrial and technological nature

The existence of a real pole-free solution of the fourth order analogue of the Painleve I equation

We establish the existence of a real solution y(x,T) with no poles on the real line of the following fourth order analogue of the Painleve I equation, x=Ty-({1/6}y^3+{1/24}(y_x^2+2yy_{xx})+{1/240}y_{xxxx}). This proves the existence part of a conjecture posed by Dubrovin. We obtain our result by proving the solvability of an associated Riemann-Hilbert problem through the approach of a vanishing lemma. In addition, by applying the Deift/Zhou steepest-descent method to this Riemann-Hilbert problem, we obtain the asymptotics for y(x,T) as x\to\pm\infty.Comment: 27 pages, 5 figure

Обоснование эффективности системы взаимоотношений с клиентами

[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT The article describes an approach of the method to study effectiveness of modern system of relationships with customers based on information technologies. In addition direct economic effects, indirect effects and effects of reducing risks in the performance of transport and logistics services are considered. Creating such a system in the holding Russian Railways is intended to increase the competitiveness of rail transport, to attract new customers, to increase revenue and reduce unproductive losses, which arise due to unsatisfactory performance referring to fulfillment of contractual obligations in the field of carriage of goods. Keywords: railway, CRM, holding company, service quality, transportation market, customer focus, logistics, efficiency, system of customer relationship, information technologies. REFERENCES 1.Tereshina, N.P.Economic regulation and com­petitiveness of transportation [Ekonomicheskoe regu­lirovanie i konkurentosposobnost’ perevozok].Moscow, Railway Ministry, 1994, 132 p. 2.Khusainov, F.I.Railways and the market: a collection of articles [Zheleznye dorogi i rynok: sbornik statej].Moscow, Nauka publ., 2015, 582 p. 3.Sokolov , Yu.I.The economics of quality of transport service of cargo owners: monograph [Ekonomika kachestva transportnogo obsluzhivanija gruzovladel’cev: monografija].Moscow, TMC for education on railway transport, 2011, 184 p. 4.Lavrov, I.M.Economic evaluation of the quality of transport services of cargo owners in terms of multiplic­ity of participants in transportation process [Ekonomiches­kaja ocenka kachestva transportnogo obsluzhivanija gruzovladel’cev v uslovijah mnozhestvennosti uchastnikov perevozochnogo processa].Ph.D.(Economics) thesis.Moscow, 2015, 167 p. 5.Macheret, D.A.Methodological problems of studies on railway transport [Metodologicheskie problemy issledovanij na zheleznodorozhnom transporte].Ekonomika zheleznyh dorog, 2015, Iss.3, pp.12-26. 6.Subjects and methods to assess the quality of transport services in terms of competition in the freight transportation market [Sub’ekty i metody ocenki kachestva transportnogo obsluzhivanija v uslovijah konkurencii na rynke gruzovyh perevozok].Vektor transporta, 2014, Vol.2, pp.44-52. 7.Sokolov, Yu.I.Service quality should be assessed by the clients themselves.World of Transport and Transportation, Vol.13, 2015, Iss.4, pp.100-109. 8.Baginova, V.V., Fedorov, L.S., Lievin, S.B.Logistics business: harmony of costs and outcome.World of Transport and Transportation, Vol.12, Iss.5, pp.112- 115.Текст аннотации на англ. языке и полный текст статьи на англ. языке находится в прилагаемом файле ПДФ (англ. версия следует после русской версии).В статье демонстрируются подходы к исследованию эффективности современной системы взаимоотношений с клиентами на основе информационных технологий. В том числе рассматриваются прямые и косвенные экономические эффекты и эффекты снижения рисков при выполнении транспортно- логистических услуг. Создание такой системы в холдинге «РЖД» преследует цели повысить конкурентоспособность железнодорожного транспорта, привлечь новых клиентов, увеличить доходы и сократить непроизводительные потери, которые возникают вследствие неудовлетворительного выполнения взятых на себя обязательств по перевозке грузов