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  • Liquid glass and aqueous solutions of silicates, as a promising basis for technological processes of new nanocomposite materials

    The properties of the water-soluble high-modulus silicate systems: based on alkali metal polysilicates called liquid glass and chain their transformation from lower to higher oligomers, with the subsequent formation of colloidal solutions - silica sol. The methods of preparation, properties and applications of water-soluble high-modulus silicate systems. The possibilities of their use as a binder and modifying agents for various nanostructured composite materials. The examples of promising areas of application of liquid glass and high modulus of aqueous solutions of silicates in construction and industry. In particular show the possibility of using liquid glass and aqueous solutions of silicates in the production of nanostructured silicate polymer. In space engineering for manufacturing water-destructed mandrels used in the manufacture of solid rocket motor casings and pressure vessels 'cocoon' of composite materials by winding. The application of the inorganic sol to obtain a nanocomposite ceramics and monolithic blocks of silicon oxide, which can be used in various fields of modern technology. The possibility of using silica sol as a binder for refractory ultra-lightweight shielding materials used to protect equipment from high impacts. The directions of development of the production of new acid-resistant materials and linings for protection of chemical equipment, parts and components operating in corrosive environments.

    Keywords: Keywords: water glass, silicate polymer concrete, additives, silicates organic bases tetrafurfuriloksisilan, furfural alcohol, nanostructure composite materials, water-soluble silicates, silica sol, sol-gel transition, cured xerogel water-destructed mandr

  • Simulation of the process of optimal placement of goods in stock self-service by evolutionary search algorithms

    The paper contains a description of a new method for automatic generation of maps of goods placement. Map of goods placement created by the author's search algorithm. The algorithm is based on ideas of evolutionary search. The proposed algorithm works with a population of constant size, allows not use complex search methods and for a reasonable time find a solution close to the optimum.

    Keywords: simulation, evolutionary computation, multicriteria optimization, genetic algorithms

  • Features of obtaining manganese dioxide by method thermolysis on the tantalum anode of condenser

    In the article obtaining of cathodic coating MnO2 on condenser porous tantalum anode was researched. It was ascertained that formation of crystalline defects from hydrated MnO2 on MnO2 coating obtaining by known technology is possible. Such formations disturb tantalum capacitor cathode integrity. To determine the reasons of the crystal defects formation conveyed simultaneous thermal analysis of Mn(NO3)2x4H2O and Mn(NO3)2x6H2O with an analysis of the flue gases by FTIR spectroscopy. Based on the analysis results a mechanism of manganese nitrate thermolysis was suggested and the cause of the crystal defects on the surface after the coating of manganese dioxide removed from the furnace was ascertained. It was established that the thermolysis process is followed by the formation of such manganese nitrate intermediates as manganese hydroxynitrate, manganese oxyhydroxide and its further oxidation to manganese dioxide. Because of secondary processes leaking on the MnO­2 cover manganese oxyhydroxide residual can react with water vapor and oxygen, that leads to the formation of crystalline defects. Such phenomenon has a negative impact on the chemical composition and integrity of the coating on the surface of the porous MnO2 tantalum capacitor anode. Also it has been found experimentally that manganese hydroxynitrate is formed from manganese nitrate in the form of microtubules on the porous tantalum vehicle surface.

    Keywords: manganese dioxide, coating, manganese nitrate, thermolysis, crystalline defects, microtubules

  • Analytical definition of a form of the greatest capacity of bulks forming of the conic bunker

    The analytical decision on definition of a forming wall of the bunker of the greatest capacity is provided in article among all bunkers having identical entrance and exhaust outlets. Such bunkers are intended for a hydraulic type of the expiration of bulk. They reduce a pulsation loose at its exit from the outlet and reduce extent of influence of the dynamic arches by account characteristics of the bunker.

    Keywords: sliding lines, entrance openings, outlets, bunker, loose body, expense of the loose.

  • Improving the quality and accuracy of anti-epidemic situation using a combination of simulation model based on stochastic model of compartmental and cellular automaton

    In article consider the development of modeling spatial spread of epidemics to improve  the quality and accuracy of anti-epidemic situation using a combination of simulation model based on stochastic model of compartmental and cellular automaton. The epidemic is spatially distributed dynamical system to describe the spatial- temporal behavior of the application of models which class of cellular automata. Cellular automata are discrete dynamical systems, which is a collection of identical cells, the same way interconnected. All cells form, the so-called lattice cellular automaton. Lattice can be of different types, differing both in dimension and shape of cells. Each cell is a finite state machine whose states are determined by the states of neighboring cells. Cells can be placed on a one-dimensional line, plane or in a multidimensional space

    Keywords: Cellular automata, simulation modeling, mathematical model, epidemic diseases, model of cholera, dynamical system, Anylogic

  • Synthesis and electrochemical properties of LiMn1/3Cr1/3Fe1/3O2 solid solution with the structure of α-NaFeO2

    The solid solution of  LiMn1/3Cr1/3Fe1/3O2 with the structure of α-NaFeO2  isostructural with the widely used LiCoO2  has been synthesized and investigated as a cathode material. Rated voltage of LiMn1/3Cr1/3Fe1/3O2  relative to the lithium is 4 V.  The possibility of charging − discharging the material to a specific capacity of 220-250 mAh/g at currents of C/15-C/50 without phase transformations has been experimentally demonstrated. 

    Keywords: lithium-ion batteries, cathode materials, Delafosse, solid solution, X-ray structural analysis, electrochemical properties

  • Stability analysis of deep loosening slopes.

    The results of calculations on the stability of slope lands treated in a new way. Device intrasoil walls combined with loosened intervals allows prevent subsurface runoff water, which reduces surface erosion slopes, improves the fertility of farmland returns a highly eroded areas in turn, eliminates the wetlands at the foot of the slopes. Established that the stability of the treated soil layer on the slope ample.

    Keywords: stability of sloping land, subsurface walls, soil subsurface runoff, soil erosion, wetlands, deep tillage, moisture saturation slope.

  • The physicochemical analysis NH4NO3 – KNO3 – Н2О system at 25 degree C

    In the article are introduced research results of physicochemical properties of ammonium nitrate – potassium nitrate water system at 25o C. The literary source analysis is performed that no clear opinion about solid phases composition. The different composition double salts, solid solution and eutectics are identifies. Appeal is specifies a look and properties of formed structures. Methods of differential thermal analysis and X-ray diffraction have been establishing that the equilibrium solid phase of the studied system represents two types of solid solutions. A first type based on the III phase of ammonium nitrate crystal latitude (at the content of nitrate of potassium to 20 %) and a second type based on the potassium nitrate rhombic syngony (at the content of nitrate of potassium more than 80 %). Crystal cells parameters of being formed phases submit to the Vegard rule. The ammonium nitrate sample (at the content of nitrate of potassium more than 12 %) keeps phase stability at the temperature range minus 50 to plus 100о С. Burst in components miscibility at the potassium nitrate concentration range 30 to 80 % is observed.

    Keywords: ammonium nitrate, potassium nitrate, differential thermal analysis, X-ray diffraction, cocrystallization, solid solution

  • The internal structure of the emotional perception political order of DGTU students

    This paper presents a method of processing and interpreting data from the semantic differential technique. It is shown, the emotional perception calculated on the standard method of average values gives an incomplete picture. The technique is approved in research of emotional perception of the political order among DGTU students. It is obtained, distribution of the studied group is inhomogeneously on emotional perception of political orders. For audience as average, and the most probable levels of perception of local and central political orders are positive and equal 0,1. However, 27% of students are characterized by a negative level of emotional perception of political order, with the average value -0.3.

    Keywords: modeling, political order, group settings, the affective component, semantic differential, questionnaire

  • Some aspects of finnish language teaching russian as a foreign language and how family in Finland

    Based on the analysis of works of finnish experts shows that learning russian language with learning the finnish language as a foreign supports the development of bilingual identity and language readiness of students. 

    Keywords: russian, finnish, teaching.

  • Engineering and psychological assessment of processing equipment of the enterprises of the motor transport at a design stage

    Questions of an engineering and psychological assessment of the equipment of the enterprises of the motor transport at a design stage on the basis of the algorithmic description of activity of operators are considered. It is shown that on in the analysis of algorithms at a design stage it is expedient to use the device of fuzzy logic.

    Keywords: algorithm, equipment, design, fuzzy logic

  • Fuzzy decision-making methods to search for objects on the sea

    Some aspects of the use of fuzzy logic to generate a mathematical model to search for objects on the sea. Describes how to use the algorithm Mamdani, to create a model of fuzzy inference. Section gives an example of the use of Fuzzy Logic Toolbox package Matlab, for the simulation of fuzzy search engine and determine the optimal solution of the problem to find the object.

    Keywords: mathematical model, fuzzy logic, object search algorithm Mamdani, membership function

  • The base organisation as a key link in branch system of an estimation and certification of qualifications

    In article it is constructed трехзвенная model of participants of branch system of an estimation and certification of the qualifications, including the branch base organisation, the ekspertno-methodical centre and set of the centres of an estimation and certification of qualifications. The role of the base organisation in the given system is shown. Character of interaction of the branch base organisation with the basic participants of system of an estimation and certification of qualifications at level отрасле is defined. The basic functions of the branch base organisation are allocated and the order of its functioning is defined. The interrelation of the branch base organisation with participants of national system of an estimation and certification of the qualifications, presented by the Socially-state council and the base organisation - National agency of development of qualifications is shown.

    Keywords: Management of process of support of raw materials of the enterprises, macrologistical system, functional structurization, objective structurization, competitiveness factors.

  • Problem of determining the residual resource of technical condition of low pressure closed spillways waterworks

    Currently, more than 80% of water conveyance structures worked much the normative life. At the same time there is a simultaneous increase in the load on the aging waterworks, in the absence of the necessary skilled personnel and technical repair base will inevitably lead to an increase in the number of accidents due to operational reasons. Identification of factors that influence the condition of the facilities at the intersections , the search for methods of calculation and control of non-destructive methods to evaluate their work , life extension , etc. is of paramount importance at this stage. Residual life for the safe operation of water conveyance structures determined on the basis of system analysis with the development of the block diagram of a dynamic system having a number of subsystems. The main property that determines the life of the system , is the reliability of its elements , ie reliability and trouble-free operation for a certain period of operation. Dependability and reliability of the system as a whole is determined by the condition that each element of the system can be in one of two states - serviceable or failure.

    Keywords: water-conducting structures, low head hydro closed spillways, modeling, technical condition, residual life.

  • Some guidelines how to increase the quality of main piping valve gate’s sealing faces

    The results of a patent search in the field of quality improvement of main piping valve gate’s sealing faces for the plants of nuclear power, thermal power and oil and gas industries are given

    Keywords: valve gate, wedge valve, main piping, patent search, sealing face