- 1. Modeling pH changes and electrical conductivity in surface water as a result of mining activities
- (Content №1 2024)
- ... Universytetu. 2024, (1): 122 - 129 https://doi.org/10.33271/nvngu/2024-1/122 Abstract: Purpose. To develop comprehensive models for predicting the pH and electrical conductivity of surface water in Maiganga ...
- Created on 29 February 2024
- 2. Mathematical models for determining and analyzing thermal regimes in mining industry mechanism structures
- (Content №6 2023)
- ... conductivity is described as a whole using asymmetric unit functions. This makes it possible to solve a differential equation with singular coefficients in both linear and nonlinear boundary value problems ...
- Created on 23 December 2023
- 3. Long-term thermal productivity of polystyrene concrete in a new composite wall in a fixed formwork
- (Content №3 2023)
- ... (2001). State Standard B V.2.7-105-2000 Construction materials and products. Method for determining thermal conductivity and thermal resistance under stationary thermal regime. Kyiv. Retrieved from https://ukrsmeta.ua/wp-content/uploads/files/DSTU/33.DOC. ...
- Created on 27 June 2023
- 4. Heavy metals removal using natural zeolite adsorption from Tigris river water at Samarra city (Iraq)
- (Content №6 2022)
- ... present study showed that the conductivity and turbidity of water decreased from 1596 to 727 c/cm, from 343 to 22 naphthalene unit (NTU), respectively, and turbidity decreased from 633 to 491 ml/L. The ...
- Created on 25 December 2022
- 5. Nanostructures of coal beds in the Sherubaynurinsky section of the Karaganda basin
- (Content №4 2022)
- ... layer, the physicochemical properties of nanomaterials occur: a change in the crystalline (supramolecular) structure of coal; a change in its electronic structure and its electrical conductivity; change ...
- Created on 29 August 2022
- 6. Numerical studies on thermochemical processing of peat in a fixed layer
- (Content №1 2022)
- ... of the dispersed phase and the rate of heterogeneous and homogeneous chemical reactions by changing the proportion of O2 or H2O air enrichment. Keywords: fixed bed, coal, peat, thermal conductivity, steam ...
- Created on 25 February 2022
- 7. Co-firing of gas coal dust fine particles and synthetic peat gas. Part 1. Simulation of processes of steam-air gasification of peat in a fixed bed and combustion of dust and gas mix in a stream
- (Content №6 2021)
- ... was numerically investigated. The composition of the generator gas at the reactor outlet was determined. Keywords: fixed bed, coal, peat, thermal conductivity, steam-air gasification, conductive ...
- Created on 29 December 2021
- 8. Improvement of oil field development using enhanced oil recovery methods
- (Content №6 2021)
- ... intervals. Increased sweep efficiency and pressure at the wellhead at the beginning and at the end of the conformance control indicate a decrease in the conductivity of high-permeability formation intervals. ...
- Created on 29 December 2021
- 9. The optimal method for assessing gas reserves based on the calculation of gas hydrodynamic parameters
- (Content №2 2021)
- ... Zhao, Y.L., Escobar, F.H., Hernandez, C.M., & Zhang,C.P. (2016). Performance analysis of a vertical well with a finite-conductivity fracture in gas composite reservoirs. Journal of Engineering and ...
- Created on 29 April 2021
- 10. Modern development of the market of ceramic construction products of Ukraine in the context of the European integration process
- (Contens №3 2020)
- ... They have also proved that: 1) due to the use of large-format ceramic blocks, it is possible to obtain a warm wall with low thermal conductivity of 0.16–0.20 W/K, which in turn allows increasing the heat ...
- Created on 02 July 2020
- 11. Simulation of heat transfer process in a multilateral cylindrical shell taking into account the internal heat sources
- (Contens №3 2020)
- ... of solving boundary value problems of the theory of thermal conductivity was applied, which includes the application of the method of reduction, the concept of quasi derivatives, the method of separation ...
- Created on 02 July 2020
- 12. Innovative technique for evaluating electric power distortion in cable transmission line
- (Content №1 2020)
- ... the electrical energy transmission process. Methodology. PI-section equivalent circuit of the cable line is used. Insulation conductivity is assumed to be infinitely small. Using the results ...
- Created on 10 March 2020
- 13. Modeling of the heat transfer process taking into account bursting expansion of fire-retardant coating
- (Content №1 2020)
- ... Originality. For the first time, using the direct method, in solving the problem of non-stationary heat conductivity, an algorithm for determining the temperature field in multilayer elements ...
- Created on 10 March 2020
- 14. Mathematical model of heat processes in terms of gas-saturated rock breaking by means of shearers and tunneling machines
- (Content №1 2020)
- ... V. А., Kudinov, I. V., & Skvortsova, М. P. (2015). Generalized functions and additional boundary conditions in the problems of heat conductivity for multilayered bodies. Journal of computational mathematics ...
- Created on 10 March 2020
- 15. Developing a mathematical model of linkage parameters of air flow in a filter box
- (Environmental Safety, Labour Protection)
- ... S. A., Meretukov, Z. A., Koshevoi, E. P., & Kosachev, V. S. (2013). Finite Element Method for Solving Thermal Conductivity Problems. Vestnik VGUIT, 2, 10-15. 15. Pivnyak, G., Samusia, V., ...
- Created on 16 June 2019
- 16. Parameters of fire-retardant coatings of steel constructions under the influence of climatic factors
- (Geotechnical and mining mechanical engineering, machine building)
- ... and simulation models of fire protected steel plate, there was determined a coefficient of thermal conductivity of the “FENYKS STS” coating, which depends on temperature. The stable volumetric heat capacity ...
- Created on 16 June 2019
- 17. Determination of temperature field in thermally sensitive layered medium with inclusions
- (Geotechnical and mining mechanical engineering, machine building)
- ... medium which contains through foreign inclusions. Methodology. It is based on the use of generalized functions; this enables us to express the coefficient of heat conductivity for such a structure ...
- Created on 03 March 2019
- 18. Mechanochemical synthesis of additives for cathode material of lithium-ion traction batteries
- (Electrical Complexes and Systems)
- ... that after their activation within VVM, the additives intensify electronic conductivity owing to the formation of solid solutions in the process of the activation, on the one hand, and, on the other hand, ...
- Created on 26 December 2018
- 19. The energy technological background of involving salty coals into energy balance of Ukraine. 1. Composition of water extracts and the prospects for their utilization
- (Solid State Physics, Mineral Processing)
- ... estimated using the 4805 Conductivity TDS/Temp indicator/EZODO. Findings. The composition and peculiarities of the mineral phases from extracts of salty coals of different domestic deposits are determined. ...
- Created on 26 December 2018
- 20. Parallel computational algorithms in thermal processes in metallurgy and mining
- (Information technologies, systems analysis and administration)
- ... 6. Shvachych, G. G. and Shmukin, A. A., 2014. On the concept of unbounded parallelism in the problems of thermal conductivity. East-European Journal of Advanced Technologies, 3(9), pp. 81‒84. ...
- Created on 27 August 2018