Національний ТУ «Дніпровська політехніка» — відповідність Часу

Важливим елементом пізнаваності університету на зовнішньому ринку у науковій сфері є рівень цитованості публікацій у визнаних науковометричних базах даних.

Поточний індекс Гірша за наукометричною базою даних Scopus h=8


Reference: Gornostayev, S.S., Crocket, J.H., Mochalov, A.G., & Laajoki, K.V.O. (1999). The platinum-group minerals of the Baimka placer deposits, Aluchin horst, Russian Far East. Canadian Mineralogist, 37(5), 1117-1129.

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Abstract: An Alpine-type mafic-ultramafic complex and several Alaskan-Ural type (AUT) plutons are exposed in the Aluchin horst, Chukotka, Russian Far East. Platinum-group element (PGE) mineralization is observed in placer deposits associated with the occurrence of a local stratigraphic unit (Volga) of Late Jurassic sediments. The platinum-group minerals (PGM) in these placer deposits consist mainly of native platinum and grains of Pt-Fe alloy, with Fe contents ranging from 0.3 to 36.15 at. % and, rarely, iridium, cooperite and sperrylite. Minerals present as inclusions in the grains of Pt-Fe alloy are: bowieite, cooperite, kashinite, erlichmanite, hollingworthite, irarsite, cuprorhodsite, laurite, Ir oxide (or hydroxide), osmium, prassoite, guanglinite, rhodarsenide, magnetite, plagioclase, silicate glass inclusions and unnamed PGE phases. Some PGM inclusions occur in assemblages of two or three phases indicative of a high-temperature origin for these nuggets. The data on PGM and other mineral inclusions in the grains of Pt-Fe alloy as well as their distribution and occurrence suggest that the primary source for the majority of PGM placer grains studied are AUT mafic-ultramafic complexes.


Reference: Sarycheva, L. (2003). Using GMDH in ecological and socio-economical monitoring problems. Systems Analysis Modelling Simulation, 43(10), 1409-1414. https://doi.org/10.1080/02329290290024925

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Abstract: Geographically distributed and time-phased ecological and socio-economical indices are treated as source data for the analysis, carried out for taking reasoned management decision. Analysis complexity, related to multi-dimensional data is overcome thanks to using group methods of data handling (GMDH). This work shows the results of Ukraine's regions cluster analysis by the totality of ecological and socio-economical indices. These results are visualized as homogeneity classes' map in geographic information system.


Reference: Chernai, A.V., Sobolev, V.V., Chernai, V.A., Ilyushin, M.A., & Dlugashek, A. (2003). Laser ignition of explosive compositions based on di-(3-hydrazino-4-amino-1,2,3-triazole)-copper(II) perchlorate. Combustion, Explosion and Shock Waves, 39(3), pp. 335-339

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Abstract: Laser ignition of explosives based on di-(3-hydrazino-4-amino-1,2,3-triazole) copper(II) perchlorate was investigated. Dependences of explosive sensitivity on the concentration of the transparent binder and on the radiation spot diameter and time dependences of the ignition delay were constructed. An ignition mechanism is proposed that is based on the concept of the deformation instability of an explosive composition caused by local heating of optical microinhomogeneities.


Reference: Gornostayev, S.S., Walker, R.J., Hanski, E.J., & Popovchenko, S.E. (2004). Evidence for the emplacement of ca. 3.0 Ga mantle-derived mafic-ultramafic bodies in the Ukrainian Shield. Precambrian Research, 132(4), 349-362. https://doi.org/10.1016/j.precamres.2004.03.004

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Abstract: The Archean bedrock of the Ukrainian Shield is divided into western and central blocks by a N-W trending tectonic zone known as the Golovanevsk suture zone. Within this zone, there are numerous mafic-ultramafic bodies including the chromitite-bearing Lipovenki and Kapitanov massifs. The chromitites of these massifs possess mineralogical and textural features and platinum-group element systematics similar to those typically observed in ophiolitic podiform chromitites. Although there is no field evidence for an ophiolitic structure, the geochemical evidence strongly suggests an origin in the oceanic lithosphere. The Re/Os ratios of the chromites and whole-rock chromitites are extremely low, and consequently, their 187Os/188Os ratios have increased little since crystallization. Osmium isotope model ages indicate formation at approximately 3.0 Ga, suggesting that the massifs represent portions of the Archean oceanic lithosphere.


Reference: Law, B.E., Ulmishek, G.F., Clayton, J.L., Kabyshev, B.P., Pashova, N.T., & Krivosheya, V.A. (1998). Basin-centered gas evaluated in Dnieper-Donets basin, Donbas foldbelt, Ukraine. Oil and Gas Journal, 96(47), 74-78

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Abstract: [No abstract available]


Reference: Mikhlin, Y.V., & Zhupiev, A.L. (1997). An application of the inch algebraization to the stability of non-linear normal vibration modes. International Journal of Non-Linear Mechanics, 32(2), 393-409. https://doi.org/10.1016/s0020-7462(96)00047-9

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Abstract: A normal vibration mode stability in conservative non-linear systems is investigated. The algebraization by Ince (transition from linear equations with periodic coefficients to equations with singular points) is used. The normal mode stability in homogeneous systems, whose potential is an even homogeneous function of the variables and systems close to the homogeneous one, is investigated. Eigenvalues and eigenfunctions are obtained. Conditions when a number of instability zones in a non-linear system parameters space are finite (finite zoning or finite-gap conditions) are also obtained.


Reference: Manevich, L.I., & Mikhlin, I.V. (1972). On periodic solutions close to rectilinear normal vibration modes. Journal of Applied Mathematics and Mechanics, 36(6), 988-994. https://doi.org/10.1016/0021-8928(72)90032-9

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Abstract: [No abstract available]


Reference: Barkov, A.Y., Laajoki, K.V.O., Gornostayev, S.S., Pakhomovskii, Y.A., & Men’shikov, Y.P. (1998). Sorosite, Cu(Sn,Sb), a new mineral from the Baimka placer deposit, western Chukotka, Russian Far East. American Mineralogist, 83(7-8), 901-906. https://doi.org/10.2138/am-1998-7-823

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Abstract: Sorosite, ideally Cu(Sn,Sb), is a new mienral species from the Baimka gold-platinum-group mineral placer deposit, Chukotka, Russian Far East. It occurs as large subhedral to euhedral crystals (0.1-0.4mm in length), hexagonal in cross section, minute crystals (≤ 15 μm, also hexagonal), and anhedral grains. Sorosite forms inclusions in Sb-bearing native tin, is often intergrown with stistaite (Sn1.12-1.13Sb0.87-0.88) and occurs with herzenbergite (SnS), native lead, and trace cassiterite. Sorosite is brittle with a microhardness VHN40-50 = 443.7 kg/mm2 (n=3). No cleavage is observed. In reflected light, the large crystals are nearly white with a pinkish tint, whereas the microcrystals show a pronounced pinkish tint. Bireflectance is variable. The average of nine electron microprove analyses gave Cu 35.33, Fe 1.18, Sn 58.18, and Sb 4.77, sum 99.46% wt%, corresponding to (Cu1.00Fe0.04)E1.04 (Sn0.89Sb0.07)E0.96. The powder pattern is close to those of natural Cu(Sn,Sb) and synthetic η-Cu6n5; it was indexed for a hexagonal cell, with a = 4.217(4) A, c = 5.120(6) A, and V = 78.85 A3. For Z = 2, the calculated density is 7.6 g/cm3. The strongest lines in the pattern are at 2.970 (011), 2.112 (110), and 2.094 A (012). The sorosite-bearing mineral asemblage apparently formed under low ←o2 and ←s2 conditions.


Reference: Vlasova, E., Кovalenko, V., Kotok, V., & Vlasov, S. (2016). Research of the mechanism of formation and properties of tripolyphosphate coating on the steel basis. Eastern-European Journal of Enterprise Technologies, 5(5(83)), 33-39. https://doi.org/10.15587/1729-4061.2016.79559

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Abstract: The mechanism, protective properties, microstructure, phase composition of coats on steel have been investigated. According to the developed method, the coats were deposited potentiodynamically and potentiostatically in an aqueous solution of sodium tripolyphosphate. Based on the results of electrochemical studies, it has been established, that on potentiodynamic curves, characterizing the corrosion behavior of low-carbon steel in an aqueous sodium TPP solution, up to three passivation plateaus can be observed. The multi-stage formation mechanism of tripolyphosphate coat has been proposed. The mechanism includes three stages: at the start the adsorptive film is formed, that afterwards is modified two times, accompanied by a change of properties and composition. By using the methods of optical and scanning electron microscopy, X-ray diffraction, it has been established that the coat formed in an aqueous Na TPP solution by the potentiodynamic method under conditions of complete passivation, is composed of two layers: first - thin, compact layer, that contains a crystalline phase of phosphate nature, and second - thick hydrophilic layer, capable of drying. Such coat possesses the best protective properties in 0.1 N Na2SO4 solution, that models conditions of atmospheric corrosion. The nature of the electrochemical formation mechanism of tripolyphosphate coats and features of their structural and phase composition have been established. The further studies will be directed at the development of effective deposition methods of tripolyphosphate coats with estimated set of properties for the protection of metal goods from atmospheric and high-temperature gas corrosion.


Reference: Lozynskyi, V.H., Dychkovskyi, R.O., Falshtynskyi, V.S., & Saik, P.B. (2015). Revisiting possibility to cross disjunctive geological faults by underground gasifier. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (4), 22-28

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Abstract: Purpose: To justify the opportunities to cross the disjunctive geological faults without full coal seam fracturing by underground gasifier, basing on the established time dependencies of underground gasifier output to an effective gasification regime applying the technology of borehole underground coal gasification. Methodology: The changing dependency of time when the underground gasifier reaches the regime of stabilization during underground coal gasification was found with a laboratory experimental unit. Findings: The dependencies of fault plane amplitude in geological fault on the distance at which the gasifier reaches the regime of stabilization on the total output of combustible gases and their heating value were received. The change of the dependency of the coefficient of gasification enhancement, which is influenced by the thermochemical rate processes in reaction channel of the underground gasifier, is presented. The approach to transfer the results of the experimental investigation in natural conditions based on geometric and time simplifications was offered. The results of the research will allow adjusting the calculation of material and heat balance of the gasification process to determine the optimal qualitative and quantitative composition of injected air. Originality: The time of underground gasifier reaching the regime of stabilization is determined by the rate of nonfracturing of a coal seam and regulated by the reaction channel advance and balanced supply of reagents blast. Practical value: The results of the experimental investigations are precise enough for practical application. They can be used to determine the output parameters allowing the process to reach the regime of stabilization during underground coal gasification. It gives the possibility to expand the use of underground coal gasification technology in geological fracturing zone and can be potentially involved in mine development of substandard coal reserves for energy and chemical generator gas production, chemicals and heat manufacture.


Reference: Bussey, M., Bjurstrom, A.E., Sannum, M., Avadhuta, S., Nadhomi-Mukisa, B., Ceruto, L., Denis, M., Giri, A.K., Mukherjee, A., Pervyi, G., & Pineda, M.V. (2012). Weaving pedagogies of possibility. Learning for Sustainability in Times of Accelerating Change 2012, 77-90. https://doi.org/10.3920/978-90-8686-757-8

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Abstract: It is easy to feel impatient with the pace of change when it comes to developing truly sustainable culture yet things are happening all over the world to lay the ground work, create the architecture and language of sustainability as a cultural reality. In Weaving Pedagogies of Possibility the authors seek to leverage from such developments. In this chapter the authors share their adventure in designing an open learning system within, across and between their institutions. We insist this work involves pedagogies in the plural as we seek to affirm and embrace alternative approaches to learning that draw on many cultures and places. We take as axiomatic that the world is always becoming other than what it appears to be; that this is contested space; and that it is in the play of environment, context, structure, culture and identity that the future lies. This sensitivity to the multiple and contested nature of social and ecological space lies at the heart of our vision and practice of pedagogies of possibility.


Reference: Kozachenko, Y.V., Rozora, I.V., & Turchyn, Y.V. (2007). On an expansion of random processes in series. Random Operators and Stochastic Equations, 15(1), 15-33. https://doi.org/10.1515/rose.2007.002

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Abstract: A paper is devoted to new expansions of random processes in the form of series. In particular case the expansions in series of stationary stochastic processes with absolutely continuous spectral function and the expansions with respect to some functions which generate wavelet basis are obtained. These results are used for model construction of stochastic processes in such way that the model approximates the process with given reliability and accuracy in some Banach spaces. The conditions of uniform convergence of Gaussian random series with independent summands are also given.


Reference: Sobolev, V.V., & Usherenko, S.M. (2006). Shock-wave initiation of nuclear transmutation of chemical elements. Journal de Physique IV (Proceedings), (134), 977-982.

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Abstract: Experimental data are given about the synthesis of chemical elements Mn, S, Na, Cu, Al, Ne, Rn etc. during superdeep penetration of lead particles into targets of Armeo iron (the SDP phenomenon It is supposed that flows of dense high-temperature plasma occur at the interface between the penetrating microparticle and the target. Consolidation of the internal energy of the plasma flows as a result of such collisions can cause nuclear transmutation of chemical elements.


Reference: Mikhlin, I.V. (1974). Resonance modes of near-conservative nonlinear systems. Journal of Applied Mathematics and Mechanics, 38(3), 425-429. https://doi.org/10.1016/0021-8928(74)90035-5

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Abstract: The Rauscher method is used to construct the steady-state resonance solutions of near-conservative nonautonomous multi-dimensional systems. It is assumed that the generating system has an analytic potential and admits of normal oscillations with rectilinear trajectories in configuration space. As is well known, the forced oscillations of systems with one degree of freedom in the resonance region are close to the natural oscillations of unperturbed conservative systems [1]. We present the possibility of generalizing this result to the multi-dimensional case, using the concept of normal forms of oscillations of conservative nonlinear systems [2, 3]. By selecting special types of external actions it was shown in [4] that the resonance modes possess the properties of the normal oscillations of conservative systems. For sufficiently general types of external periodic perturbations of quasi-linear systems close to Liapunov systems, Malkin [5] has exhaustively studied the periodic modes.


Reference: Sdvizhkova, Ye.A., Babets, D.V., Smirnov, A.V. (2014). Support loading of assembly chamber in terms of western donbas plough longwall. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (5), 26-32

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Abstract: Purpose: To determine the changes of rock stressstrain state caused by constructing the assembly chamber and creating the excavation behind the longwall. Additional goal is to develop techniques for calculating the bearing capacity of assembly chamber support and consider the rock pressure increasing at the moment when longwall starts moving from the preparatory face. Methodology: Stresses and displacements in rocks around assembly chamber and preparatory face are determined by finite element method based on elastoplastic deformation model. The procedure of strain accumula tion is implemented at the sequential change of cavity size. Failure zones are determined according to the Hoek- Brown strength criterion. Mathematical statistics methods are used to build general regularities. In particular, the nonlinear estimation method combining the multiple regression and variance analysis is used. Findings: Multi-variant calculations of rock stressstrain state are made for different values of rock strength, coal seam thickness, mining depth and excavation size as well. The results are generalized for different geological conditions. The failure zone height and excavation contour displacements are represented as a function of factors mentioned above. Originality: The new regularities of strain increasing and failure zone spreading in rocks around the excavations are obtained considering the moment when the plough longwall starts moving. The formulas for determining the basic geomechanical characteristics are derived to design excavation support under various mining and geological conditions. Practical value: The set of formulas determining the main geomechanical characteristics gives a simple techniques to calculate the necessary support capacity. It is the background for developing the standards of assembly chambers designing under conditions of the Western Donbass.


Reference: Falshtyns’kyy, V., Dychkovs’kyy, R., Lozyns’kyy, V., & Saik, P. (2013). Justification of the gasification channel length in underground gas generator. Mining of Mineral Deposits, 125-132. https://doi.org/10.1201/b16354-23

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Abstract: Justification the length of gasification channel in underground gas generator by oxidation zone calculation and by geomechanics factor are described. The new methods of gasification channel calculation on the base of underground coal combustion process is offered. Dependence the power of gas generator at thin coal seam gasification due to the length and pressure changes is shown. The rocks of roof subsidence are predicted on the base of test researches. The basic technological parameters of underground coal gasification are determined during the results transmission to natural conditions. The change of the rocks subsidence above a combustion face and gasification channel depending on the gasification channel length, combustion face advance and speeds of coal seam gasification are decided. Conclusions are given according to conducted investigations.


Reference: Kyrychenko, Y., Samusia, V., Kyrychenko, V., & Goman, O. (2012). Experimental investigation of aeroelastic and hydroelastic instability parameters of a marine pipeline. Geomechanical Processes During Underground Mining, 163-167.

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Abstract: The article contains the results of experimental research of unstable aeroelasticity type of wind resonance and galloping for the elements of pipeline of deep-water hydraulic handling. The experiments have being carried in aerodynamic pipe on a scale models while using the strain measure balance. The laws exposed and some qualitative results can be useful while investigating the self-excited oscillating of the constructions under the influence of wind load.


Reference: Kupenko, O. P., & Manzo, R. (2013). On an Optimal -Control Problem in Coefficients for Linear Elliptic Variational Inequality. Abstract and Applied Analysis, 2013, 1-13.

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Abstract: We consider optimal control problems for linear degenerate elliptic variational inequalities with homogeneous Dirichlet boundary conditions. We take the matrix-valued coefficients A (x) in the main part of the elliptic operator as controls in L 1 (Ω; ℝ N (N + 1) / 2). Since the eigenvalues of such matrices may vanish and be unbounded in Ω, it leads to the "noncoercivity trouble." Using the concept of convergence in variable spaces and following the direct method in the calculus of variations, we establish the solvability of the optimal control problem in the class of the so-called H -admissible solutions.


Reference: Falshtynskyy, V., Dychkovskyy, R., Lozynskyy, V., & Saik, P. (2012). New method for justification the technological parameters of coal gasification in the test setting. Geomechanical Processes During Underground Mining, 201–208. https://doi.org/10.1201/b13157-35

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Abstract: Implementations of test researches enable considerably to decrease expenses at the estimation of the efficiency of underground coal gasification for concrete mining and geological conditions. The new method of test researches is offered with the simulation of underground conditions of the real mine. Dependences of the material and thermal balance are proposed. The basic technological parameters of gasification are determined during the transmission results to natural conditions.


Reference: Bezpalov, A.Y., Gnatushenko, V.V., Ovsyanikov, V.V., Ovsyanikov, V.V., Reuta, O.V., Safonov, V.V., & Sydorenko, O.A. (2010). Research of antennas made gas plasma on microwave band. EuCAP 2010 - The 4th European Conference on Antennas and Propagation, 5505896

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Abstract: The results of researches internal and external microwave characteristics of loop and rod antennas on the basis of cold plasma are presented. The rows of advantages of such antennas above the metallic ones have been pointed.


Reference: Chernaj, A.V., Sobolev, V.V., Chernaj, V.A., Ilyushin, M.A., & Dlugashek, A. (2003). Laser initiation of charges on the basis of di-(3-hydrazino-4-amino-1,2,3-triazol)-copper (II) perchlorate. Fizika Goreniya i Vzryva, 39(3), pp. 105-110

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Abstract: The experimental results are presented on investigation of laser initiation of explosive compositions on the basis of di-(3-hydrazino-4-amino-1,2,3-triazol)-copper (II) perchlorate. The dependences of compositions sensitivity on the radiation-transparent binder and radiation spot diameter as well as time dependences of ignition delay are obtained. An initiation mechanism is suggested.


Reference: Mostika, Y.S., Karmazin, V.I., Shutov, V.Y., & Grebenyuk, L.Z. (1999). About the Equations of Motion of a Magnetic Particle in a Magnetic Separator. Magnetic and Electrical Separation, 10(1), 35-44. https://doi.org/10.1155/1999/56186

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Abstract: Equations of motion of magnetic particles in the flow medium near a cylindrical ferromagnetic collector have been developed. A vector equation, expressing the balance of the inertia force and the vector sum of three forces: the magnetic, the gravitational and the hydrodynamic drag force of a particle was taken as the initial equation. Reduced equations obtained from the initial one by rejection of terms corresponding to the inertia or the gravitational force were also considered. Examples of numerical evaluation in which the motion trajectories calculated with the use of the initial equation were compared with the reduced equations of motion are given.


Reference: Saik, P.B., Dychkovskyi, R.O., Lozynskyi, V.H., Malanchuk, Z.R., Malanchuk, Ye.Z. (2016). Revisiting the underground gasification of coal reserves from contiguous seams, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (6), 60-66

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Abstract: Purpose. Substantiating of contiguous coal seams coefficient during application of borehole underground coal gasification technology based on dependences of interstratial rocks subsidence on gasification duration. methodology. Using stand experimental research and methods of computer modeling we obtained the dependences of interstratial rocks subsidence in terms of their thickness change, alternating thickness of coal seams and duration of the gasification process. To reflect the geomechanical situation of rock mass around underground gasifier, license software Flac 5.00 was used. For data processing and building of synthesis dependences, the method of multiple regression using generally accepted data processing systems - Excel-2013 was used. findings. The obtained inequality allows setting the coefficient of contiguous coal seams during the application of underground gasification technology. Setting this factor makes it possible to assess mining and geo-logical conditions of coal seams occurrence with further rational order of their gasification. For values of contiguous coefficient 5.5-5.7, gasification of coal seams can be carried out both in ascending and descending sequence. In this case, there is no need to preserve the allowable distance between combustion faces on adjacent seams. Originality. To determine the contiguous of coal seams, a mathematical mechanism was developed, whose effectiveness is confirmed by computer simulation of rock massif that contains an underground gasifier and by research on a special test bench installation. The difference between the results was less than 24 %. Practical value. Dependence of interstratial rocks subsidence at changing duration of the gasification process describing the development of possible formation of gas-permeable cracks in interstratial rocks ensuring technological process was established. The obtained conditions of contiguous coal seams allow providing rational order of mine workings.


Reference: Pivnyak, G., Dychkovskyi, R., Smirnov, A., & Cherednichenko, Y. (2013). Some aspects on the software simulation implementation in thin coal seams mining. Energy Efficiency Improvement of Geotechnical Systems, 1-10. https://doi.org/10.1201/b16355-2

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Abstract: The features of simulation application of the computer systems in a mining production and the methods of their creation and efficiency application are considered. The UML-diagram of general simulation system forming of the mine which contain the basic mining processes of production is offered. This elaboration is opened, that allows connecting the necessary modules of calculation at the change of mine and geological situation in extraction area. It is oriented on the mutual tying up of all technological chain of separate coal extraction enterprise: processes of working face, transporting of the reflected rock mass and other. Such model enables effectively to manage the mining processes. The special attention is spared the simulation of wallface. This system enables to show out on the display of computer as simulation the real situation or certain model with the proper admittances in relation to authenticity of results and to carry out monitoring and management of mine production processes directly from the mine surface. Examples of such models are made for the separate mine and geological conditions of the mines SC «Pavlogradvugillya» and SC «Lvivvugillya». The economic evaluation of efficiency work of the simulation systems is executed on the mines of the mentioned companies.



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