Key words and phrases:electronic measurement equipment; metrological characteristic; metrological reliability; veracity of prediction.
Abstract: We propose confidence index to predict metrological reliability of electronic measuring equipment. The possibility of choosing the most appropriate type of mathematical model for predicting the metrological reliability using the proposed confidence index has been shown.
Key words and phrases: chemical reactions; indirect express-control.
Abstract: Methodological grounds of express-control over chemical reactions in the liquid phase with respect to the synthesis of high-energy substances are developed. Sensors and software for the chemical reaction monitoring have been designed.
Key words and phrases: cardiovascular system; hemodynamic; mathematical model.
Abstract: The paper presents a mathematical description of the cardiovascular system model with a pulsating heart. The cardiovascular system is represented as series-connected eight elastic chambers.
Key words and phrases: multi-assortment chemical production; process systems; selecting hardware design; selecting main instruments.
Abstract: This paper is dedicated to selecting the main instruments of technological systems of multi-assortment chemical plants, which have a rapid turnover of the range and volumes of products. The overall objective of selecting main instruments is presented in the form of a two-level hierarchy of tasks. The tasks of the upper and lower levels of the hierarchy have been set in the generalized form; the required input data and their sources have been listed; the method collaborative problem solving has been proposed.
Key words and phrases: industrial wastewater treatment plants; information system; mathematical modeling.
Abstract: This paper covers the formulation of the problem, mathematical models and algorithms underlying the construction of decision-making system for the design of industrial wastewater treatment plants.
Key words and phrases: aeration tank; denitrifier; mathematical modeling of biochemical processes; wastewater treatment facilities.
Abstract: This paper examines mathematical models of biochemical processes at wastewater treatment plants.
Key words and phrases: calculation of auxiliary equipment; multi-assortment chemical process systems.
Abstract: The paper describes a computer-aided selection of auxiliary equipment for multi-assortment chemical plants. The system includes software modules developed in Microsoft Visual Basic environment. The software complex also comprises an electronic catalog of auxiliary process equipment, including measuring tanks, collectors and pumps.
Key words and phrases: interval numbers; rotary furnace; uncertain parameters; phosphogypsum.
Abstract: The paper describes the process of recycling solid industrial waste on the example of phosphogypsum; a mathematical model of the firing process in rotary furnace has been constructed; the uncertainty of the mathematical model has been revealed by means of interval analysis.
Key words and phrases: mathematical modeling; tubular reactor.
Abstract: The article explores the problem of finding the best operational and structural characteristics of a tubular reactor with the ability to control the activity of the catalyst for the length of the tube; the assessment of a theoretically possible yield of the desired product has been made.
Key words and phrases: mathematical models; parallel computing; process piping; tracing; tracing algorithms.
Abstract: The paper describes an algorithm with parallel computing solutions for tracing process connections.
Key words and phrases: ecological expert evaluation; engineering facilities; information system; virtual model.
Abstract: This article explores the problem statement and models for making a decision about the feasibility of environmental measures during expert evaluation of engineering facilities.
Key words and phrases: automation; chemical equipment; functional model; schedule of repairs.
Abstract: The article describes a functional model of scheduling equipment repairs for multi-assortment, low tonnage chemical plants.
Key words and phrases: functional model of pre-preparation; structure; uniform information space.
Abstract: The paper describes a functional model of pre-preparation and the structure of common information space of an engineering enterprise.
Key words and phrases: information and education system; virtual simulators; 3D-modeling.
Abstract: The approaches to creating information and educational systems of engineering students’ training as well as staff development at industrial enterprises have been proposed.
Key words and phrases:crystallization; granulometric composition; oxidation.
Abstract: The paper offers a mathematical description of the kinetics of Belofor OB crystallization process complicated by chemical reaction. It takes into account the processes of the target substance formation as well as the process of nucleation and crystal growth.
Key words and phrases:gas-liquid flow; heat-transfer coefficient; turbulent flow.
Abstract: The paper deals with turbulent heat exchange of fine-dispersed gas-liquid flows in cylindrical hot channels, a criterion equation to determine the heat-transfer coefficient and its distribution along the channel with regard to the drop phase evaporation have been obtained.
Key words and phrases:cryofractionation; design parameters; filling the reaction space; fluid spatial jets; heating; process parameters.
Abstract: The paper explores the possibility of using fluid spatial jets in cryofractionation processes of chemical and pharmaceutical raw materials. We propose the calculation techniques for such processes as the distribution of pressure of the process fluid in the channels of the device, the thickness and temperature of the liquid film, the time of filling and heating the reaction space. The dependences for calculation of optimal design parameters of the devices for the formation of liquid jets space have been produced.
Key words and phrases:circulation in the drop; distillery grains; drop; drop profile; inert carrier; structuring dryer heat and mass transfer in the drop.
Abstract: The paper presents the results of microscopic examination of liquid grain distillery stillage and filtrate, cake and syrup produced from it. The formation of self-organizing structures on the surface of stillage drop drying on a solid substrate has been considered.
Key words and phrases: binding energy; electric double layer; ions; G orange pigment; particles of organic substances; quantum-chemical calculations; sorption; water-soluble impurities.
Abstract: The article describes the results of the study of ion desorption of water-soluble impurities from the surface of the orange G pigment particles in the process of its washing on the filter septum. We examine the process of removing ions of water-soluble impurities from the surface of particles of organic substance based on the model structure of the suspension on the electric double layer. Quantum chemical calculations to determine binding energy of the molecules of the elements of organic substance particles with chloride ions and hydroxyl groups have been made.
Key words and phrases:altax; alternative current; current yield; frequency; kaptax; replenishment; specific energy consumption.
Abstract: A system for studying the influence of the alternating current frequency on the process of electrochemical synthesis of organic compounds has been developed. The influence of the alternating current frequency on the current yield and specific electric energy consumption in the electrochemical synthesis of altax has been studied. Effective modes of the electrochemical synthesis of altax have been identified.
Key words and phrases:diffusion coefficient; dyeing; fiber; mass transfer within the fiber; optical bleach concentration.
Abstract: This paper describes a method of calculating the concentration of bleach in cotton fibers in the dyeing process. The dependencies of bleach concentration in cotton fibers have been calculated.
Designing Energy-Saving Process, Instruments and Technology
for Regenerative Product with Potassium Ferrate (VI)
Yu.B. Rylov1,2, S.I. Dvoretsky1
Department “Technologies of Foodstuffs”, TSTU (1);
Joint Stock Company “Corporation Roskhimzashchita” (2), Tambov
Key words and phrases:engineering process; non-conducting respiratory apparatus; potassium ferrate (VI); potassium superperoxide; regenerative product; self-propagating high-temperature synthesis; synthesis reactor.
Abstract: The engineering process for obtaining new regenerative product with potassium ferrate (VI) and the synthesis reactor of potassium ferrate (VI) have been designed. The testing of regenerative product with potassium ferrate (VI) as part of SPI-20 and SHSS-T apparatuses has been done; these devices can be used for protecting human respiratory organs in emergency situations of anthropogenic and natural disasters.
Research into Dynamics of Adsorption and Desorption of Water Vapour by Active Aluminium Oxide and NaX Zeolite
A.S. Sergunin1, S.I. Simanenkov2, N.Ts. Gatapova1
Department “Technological Processes and Apparatuses”, TSTU (1);
Joint Stock Company “Corporation Roskhimzashchita” (2), Tambov
Key words and phrases:air drying; heat of adsorption; mass transfer coefficient; pressure swing adsorption.
Abstract:The paper describes adsorption and desorption of the plant. We present and analyze the results of experiments to study the dynamics of adsorption and desorption of water vapor by active alumina and NaX zeolite with various fractional composition. The coefficients of mass transfer have been produced.
LAMINATED COMPOSITE SHELL IN CYLINDRICAL BENDING
G.M. Kulikov1, A.A. Mamontov2, S.V. Plotnikova1, A.V. Erofeev2
Departments: “Applied Mathematics and Mechanics” (1),
“Construction of Buildings and Structures” (2), TSTU;
Key words and phrases: cross-ply composite; cylindrical shell; plane strain elasticity; sampling surfaces method.
Abstract: This paper presents an efficient method of solving the plane strain problem of elasticity for laminated composite cylindrical shells. The method is based on the new concept of sampling surfaces (SaS) proposed recently by the authors. According to this concept, we introduce inside the nth layer not equally spaced SaS parallel to the middle surface of the shell and choose displacements of these surfaces as shell unknowns. Such choice of displacements allows the derivation of strain-displacement relationships, which exactly represent all rigid-body shell motions in any curvilinear surface coordinate system. The latter gives in turn the opportunity to find the solutions of plane strain elasticity for thick and thin laminated cylindrical shells with a prescribed accuracy by using a sufficiently large number of SaS, which are located at layer interfaces and Chebyshev polynomial nodes.
Key words and phrases: ellipsometer; optical system; polarization; refractive index; thin films.
Abstract: The paper explores the problem of measuring the thickness of thin transparent films on reflecting substrates. As thin films can differ from thick ones with the same chemical composition by their optical properties, we propose the technique to determine these properties on the examined sample. Having measured the optical characteristics of a particular film, we can measure its thickness more accurately than in case of measuring by reference data.
Key words and phrases: CAD/CAM systems; cutting tools; database.
Abstract: The paper describes the developed database of cutting tools and processed materials on the basis of desktop app Microsoft Access 2010 that can be used as a unit of preparing initial data in CAD systems for cutting operations.
Key words and phrases: action velocity; activation pressure; effective capacity; vacuuming.
Abstract: The paper studies the process of vacuuming with two-phase liquid ring-shaped vacuum pump of modular type with serial activation of phases. On the basis of empirical and theoretical studies we propose a method for calculating the basic geometric and kinematic relations of phases of the examined vacuum pump.
Key words and phrases: alternating sinusoidal current; hydroxide; iron oxide; sodium nickel oxide.
Abstract: The process of obtaining mixtures of nanodispersed powders of nickel oxide and iron oxide by electrolysis of alternating sinusoidal current has been studies. The dependences of iron and nickel content in the mixtures catalyst on the ratio of metal electrodes areas have been obtained. The possibility of synthesizing the mixtures of nanodispersed powders of nickel oxide and iron oxide with the given composition has been shown.
Key words and phrases: crystal structure; phase coexisting; relaxor ferroelectrics.
Abstract: Dielectric anomalies specific for to relaxor ferroelectrics have been found for the SrTiO3 – BiScO3 system. The relaxor properties of this system are rather unexpected because neither SrTiO3 nor BiScO3 are ferroelectrics. An X-ray diffraction analysis revealed that at room temperature the ceramic (1 – x)SrTiO3 – xBiScO3 samples with x = 0.2, 0.3 and 0.4 consist of a mixture of a cubic centrosymmetric Pm3m phase and a tetragonal polar P4mm phase. Lattice parameters for these phases increase as x increases. In addition, it was found by the electron backscattered diffraction method that at room temperature, the fraction of the cubic phase decreases and the fraction of the tetragonal phase increases as the mole fraction of BiScO3 increases. Phase coexistence is assumed to be one of the reasons for the relaxor properties of the system under study.
Key words and phrases: ammonium persulfate; carbon nanotubes; polyaniline; potassium permanganate.
Abstract: Nanocomposites based on carbon nanotubes, modified with polyaniline have been obtained. Polyaniline has been synthesized by oxidative polymerization of aniline. Potassium permanganate and ammonium persulfate have been used as oxidizers. The effects of the nature of oxidant and synthesis conditions on electoconductivity and morphology of the obtained materials have been studied.
Key words and phrases: composite; Curie temperature; dielectric permittivity; ferroelectric.
Abstract: Based on data of structural and dielectrical studies a correlation between the behavior of dielectric parameters (dielectric permittivity, Curie temperature) and structural feature of a composite based on porous Al2O3 with TGS inclusions has been established. It has been shown that variation of ferroelectric inclusions size and its relative position determines shifting of the phase transition temperature.
Key words and phrases: nanodispersion; polymeric composite materials; durability; filler size; carbon nanotubes.
Abstract: The problem of increase in durability of polymeric composite materials is considered by introducing nanodimensional particles into their structure. It is shown that the introduction of nanodisperse particles into the structure of a polymeric matrix can increase its durability characteristics. Carbon nanotubes are offered as filler.
Key words and phrases: aluminum alloys; eutectic alloys; iron containing phases; morphology of phases.
Abstract: Experimental and thermodynamic studies of multi-component phase diagrams with additions of refining elements have been carried out using Thermo-Calc Software; microstructures of the alloys in as-cast and annealed states have been analyzed. The possibility to obtain iron-containing phases with almost spherical morphology enabling to neutralize negative influence of iron on ductility and fracture strength of alloy has been described.
Key words and phrases: classification; destructive methods; non-destructive; porosimetry; porosity parameters of the porous structure.
Abstract: The article presents the scientific classification of methods to control porous structure of materials. The classification is based on such generalizing features as the character and nature of the impact on the controlled material, resolution, the controlled parameter of the porous structure. Critical analysis of methods to control porosity based on the established classification enables to reveal the most promising methods, which include those based on gas perturbing effects.
Key words and phrases: DC link; heat leakage flux; high-speed protection system; protection sensitive organ; short circuit; stand-alone power system.
Abstract: We consider the principle of protection of high-current DC links against short-circuits with switching devices controlled by circuits computing the value of current in a conductor on the basis of the known values of the absolute temperature of the conductor and the ambient air, as well as the change rate of the conductor temperature. We offer a version of the protection sensitive organ.
Key words and phrases: championship in programming; competition; creative competence; Olympiad movement.
Abstract: The paper studies a cluster of creative competences of IT specialist; the mechanism of organizing Olympiad movement has been described; the peculiarities of organizing championship in programming has been analyzed; the technique of arranging training courses for this kind of championships has been described.
Key words and phrases: mathematical model of value-oriented core; modeling of university educational system; university educational system; value-oriented core.
Abstract: The paper describes the construction of mathematical model of value-oriented core of the university educational system and its application for qualitative analysis of the effectiveness of university educational system development.
Key words and phrases: information and communication technology; informatization consciousness; infosocialization.
Abstract: The article is devoted to a new type of socialization, namely, infosocialization. The author examines the phenomenon of infosocialization as a modern social trend. The necessity of forming a specific individual consciousness, i.e. informatization consciousness has been stressed.
Key words and phrases: pioneers; school Komsomol organization; “thaw”; youth.
Abstract: The paper describes the main materials of directions of Komsomol organizations mentoring pioneers in the mid-1950s in the Tambov region. According to the author, in this period, the Young Communist League, condemned the attempts to replace schools and teachers with pioneering organizations and realized the need for greater involvement of pioneers in active social and political work in an understandable way .
Key words and phrases: alienation; Christianity; German philosophy; objective spirit; rationalism; Russian religious philosophy; Schelling; synthesis of anthropology and ontology.
Abstract: The article focuses on the problem of alienation in Hegel’s philosophy and its relevance. The problem of overcoming the alienation in Hegel’s philosophy and in Russian religious philosophy has been explored.
Key words and phrases: argumentation; discourse; evidence categories; rhetoric; text.
Abstract: The article refers to the categorical attributes of text and discourse, the differences between the parameters of rhetorical and logical reasoning, the efficiency of argumentation as a theory of reasoning.