Saratov State Agrarian University

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Saratov, Russia
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Klevanskiy N.N.,Saratov State Agrarian University | Antipov M.A.,Saratov State Agrarian University | Krasnikov A.A.,Saratov State Agrarian University
Procedia Computer Science | Year: 2017

This paper demonstrates timetabling visualizations - timetables, transport timetables, multi-project schedules. These visualizations present an allocation of system resources. The visualization of high-school timetable demonstrates a timetable of student groups. The visualization of transport timetable shows arrivals/departs across stations and lines. The visualization of multi-project schedule includes Gantt chart and an allocation of system resources. These visualizations are provoked a new approach to timetable optimization. The timetabling problems can be solved efficiently by two-stage algorithm developed in database system. The first, a set of demands must be developed as initial timetable. A set of local and global resources are available for carrying out the activities of the systems. The solutions obtained by the first stage algorithm with the best resource allocation rule are used as a baseline to compare those obtained by the latter. The second, the initial timetable must be optimized. The basic criterion for optimization operations is demanded as criterion of resource equability. The latter is equal a root-mean-square deviation from a middle value.


Tsarenko A.A.,Saratov State Agrarian University | Schmidt I.V.,Saratov State Agrarian University | Tarbaev V.A.,Saratov State Agrarian University
Journal of Environmental Management and Tourism | Year: 2017

The article is devoted to topical issues of land cadastral relations in the organization of the system of lands and rural areas monitoring. It presents a new model developed by the authors of the management system of lands and rural areas monitoring in the sphere of cadastral relations. The study is based on the methods of scientific research: systemic, geoinformational and statistical method. The modern complex approach to managing monitoring measures, suggested by the authors, will favor the right development of the conception of conducting monitoring. Strategic monitoring model makes it possible to organize work at a high technological level and moreover to achieve key results avoiding many problems and mistakes. The model is expressed through an organizational and strategic scheme-model that promotes effective work management and reliable data collection. The article also examines the issues influencing the development of the whole conception of the state and political system in the field of land cadastre relations. Solutions to the problems of technological and methodological support of the formation of modern interactive databases and the application of GIS technology, developed by the authors, give an opportunity to conduct deep integrated strategic monitoring of lands and rural areas in the sphere of cadastral relations. © 2017. ASERS Publishing. All rights reserved.


Gestrin S.G.,Saratov State Agrarian University | Shchukina E.V.,Saratov State Technical University
Russian Physics Journal | Year: 2017

We consider the wave processes in a hole gas inside an electric field created by the charge distribution of donors and acceptors near a negatively charged dislocation in a semiconductor crystal of n-type. It is shown that the solution of the Korteweg–de Vries equation describes solitary waves propagating along the axis of the Read’s cylinder. The soliton velocity is estimated for the values of physical parameters characterizing the semiconductor crystal and the region near the dislocation. © 2017 Springer Science+Business Media New York


Gestrin S.G.,Saratov State Agrarian University | Shchukina E.V.,Saratov State Technical University
Russian Physics Journal | Year: 2016

It is demonstrated that propagation of the soliton described by the Boussinesq equation along a linear defect of the crystal structure leads to radiation of sound waves (analog of the Vavilov–Cherenkov effect). Radiation that has a continuous spectrum diverges conically from the dislocation line, and the apex angle of the cone is determined by the ratio of the sound speed in the crystal to the soliton speed. With increasing soliton speed, the maximum of the spectral flux density of sound energy is displaced toward higher frequencies. An analytical expression for energy losses is derived. © 2016, Springer Science+Business Media New York.


Gestrin S.G.,Saratov State Agrarian University | Schukina E.V.,Saratov State Technical University
Russian Physics Journal | Year: 2014

Longitudinal oscillations localized on dislocations are shown to exist in C4v piezoelectric crystals. Dispersion equations are constructed for axially symmetric and localized screw waves. Frequency regions separating their frequencies from the spectrum of volume oscillations are identified. © 2014 Springer Science+Business Media New York.


Gestrin S.G.,Saratov State Agrarian University | Schukina E.V.,Saratov State Technical University
Russian Physics Journal | Year: 2014

Coupled sonic waves localized on dislocations in a piezoelectric crystal are investigated. The frequencies of in-phase and counter-phase oscillations in a system of two dislocations are found out. It is shown that due to the intrinsic resonance the oscillation energy is alternately concentrated near one dislocation or the other. The complete or partial energy exchange occurs, provided there is an arbitrary weak coupling in the system. As the interaction is decreased, the energy exchange between the dislocations is only slowed down. © 2014 Springer Science+Business Media New York.


Pankratov A.N.,Chernyshevsky Saratov State University | Tsivileva O.M.,Russian Academy of Sciences | Drevko B.I.,Saratov State Agrarian University | Nikitina V.E.,Russian Academy of Sciences
Journal of Biomolecular Structure and Dynamics | Year: 2011

The role of spatial and electron structure, hydrophobic properties and concentration of organoselenium compounds on their interaction with fungal metabolites - extracellular lectins of Lentinula edodes (shiitake mushroom) has been considered. By the hybrid method of density functional theory at the B3LYP/6-31G(d,p) theory level, spatial and electronic structure of the 1,5-diphenyl-3-selenopentanedione-1,5 (preparation DAPS-25), 1,5-di(4-methoxyphenyl)-3-selenopentanedione-1,5 and 1,5-di(4-ethoxyphenyl)-3- selenopentanedione-1,5 molecules has been studied. The above molecules have been stated to be substantially similar to each other by their electronic and spatial characteristics. By means of the QSAR properties evaluation by the atomic-additive schemes, it has been shown that the molecules of the preparation DAPS-25, its dimethoxy- and diethoxy-substituted are close to each other by the hydrophilic-lipophilic balance, whereas di-n-octoxy derivative DAPS-25 is explicitly hydrophobic. The hemagglutinating activity of lectins in the presence of the preparation DAPS-25 and its alkyloxy-substituted increases, therewith the most effective addition is 1,5-di(4-ethoxyphenyl)-3-selenopentanedione-1,5. Apparently, the greater effectiveness of the said substance compared to DAPS -25 is caused by the formation of hydrogen bonds with a participation of unshared electron pairs of oxygen atoms from the ethoxy groups and mobile hydrogen atoms from the OH groups of glycoconjugates on erythrocytes surface. The positive effect of 1,5-di(4-n-octoxyphenyl)-3-selenopentanedione-1,5 is not so prominent, since the enlarged alkyl chain shields the aromatic fragments of organoselenium molecule participating in the binding with lectin. ©Adenine Press (2011).


Kuznetsov V.A.,Saratov State Agrarian University
Russian Physics Journal | Year: 2011

It is demonstrated that the resonant mechanism on inhomogeneities formed for a fixed distribution of dielectric permittivity can underlie the directed self-organization of the electron flow in semiconductors. The behavior of the resonant flow velocity amplitudes depending on the inhomogeneity factors is considered in the ballistic regime. © 2011 Springer Science+Business Media, Inc.


Ulianova O.V.,Saratov State Agrarian University | Ulianov S.S.,Chernyshevsky Saratov State University | Li P.,Wuhan University of Science and Technology | Luo Q.,Wuhan University of Science and Technology
Quantum Electronics | Year: 2011

A new method of photoinactivation of bacteria aimed at producing prototypes of vaccine preparations against extremely dangerous infections is described. The reactogenicity of the new prophylactic preparations was studied using the laser speckle contrast analysis (LASCA). The performed experimental studies show that bacterial suspensions, irradiated using different regimes of photo- inactivation, do not cause detrimental effect on the blood microcirculation in laboratory animals. © 2011 Kvantovaya Elektronika and Turpion Ltd.


Kuznetsov V.A.,Saratov State Agrarian University
Conference Proceedings - International Conference on Actual Problems of Electron Devices Engineering, APEDE'2010 | Year: 2010

The effect of concentration inhomogeneity is analyzed for some semiconductors. In InSb this efftct occurs under temperature-electrical instability in a magnetic field. In at GaAs-GaP compound, this effect is due to the built-in gradient of static dielectric permeability and electron flow grouping. This effect may be adapted to desing an deflector of the infrared rays. ©2010 IEEE.

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