- 21. Forceful interaction of the casing string with the walls of a curvilinear well
- (Content №4 2022)
- ... elastic rod in the curved well. An inhomogeneous system of four differential equations is developed to describe the rods deformations. It was reduced to a first-order differential equation with respect ...
- Created on 29 August 2022
- 22. Strategies of GNSS processing and measuring under various operational conditions
- (Content №3 2022)
- ... 3. Tae, H., Kim, H.-I., & Park, K.-D. (2018). Analysis of Multi-Differential GNSS Positioning Accuracy in Various Signal Reception Environments. Journal of Positioning, Navigation, and Timing, 7(1), ...
- Created on 29 June 2022
- 23. Prospects of using the polymetallic ore processing waist for producing hardening mixtures
- (Content №3 2022)
- ... X-ray phase analyses, differential thermal and chemical analyses, the ore tailings composition was determined. The optimal qualitative composition of the hardening mixture with specified rheological and ...
- Created on 29 June 2022
- 24. Impact of stress concentration on reliability of metal structure elements of gantry cranes
- (Content №3 2022)
- ... the objective, the methods employed included analytical calculation method, finite element method, as well as differential and integral calculus methods. To study the state of the metal structure of the ...
- Created on 29 June 2022
- 25. A new approach to improving the sensitivity of earthing relay and reducing the over-voltage in 6 kV grid of open-pit mines
- (Content №2 2022)
- ... Queensland. Retrieved from https://eprints.usq.edu.au/43125/12/Narayan_S_Quinton_Redacted.pdf. 6. Ghanbari, T., Samet, H., & Ghafourifard, J. (2016). New approach to improve sensitivity of differential ...
- Created on 30 April 2022
- 26. Improvement of modeling techniques of transients in transformers based on magnetoelectric equivalent schemes
- (Content №6 2021)
- ... Approximation of functions by Chebyshevs polynomials, numerical methods of differential equations integrating, matrix methods, spline interpolation, programming, theory of electric and magnetic circuits. ...
- Created on 29 December 2021
- 27. High-frequency periodic processes in two-winding power transformers
- (Content №6 2021)
- ... periodic processes in transformers and methods of solving systems of partial differential equations are applied. Findings. The mathematical model for the research of high-frequency periodic processes in ...
- Created on 29 December 2021
- 28. Mathematical modeling of wave processes in two-winding transformers taking into account the main magnetic flux
- (Content №5 2021)
- ... and further development of the analytical method for solving the system of partial differential equations. Findings. A mathematical model for the research on wave processes in power two-winding transformers ...
- Created on 29 October 2021
- 29. Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies
- (Content №5 2021)
- ... (design) dimensions of the carrying elements and a boxcar with the actual dimensions (after a long service life) on the basis of the field tests. The differential equations were solved by theRungeKutta ...
- Created on 29 October 2021
- 30. Increasing the sensitivity of measurement of a moisture content in crude oil
- (Content №5 2021)
- ... with a negative differential resistance. Findings. Analytical expressions are obtained to describe the dielectric constant of an inhomogeneous mixture of water and oil. Using these equations, the capacitance ...
- Created on 29 October 2021
- 31. Compound physical and mechanical effects stimulating metastable diamond formation
- (Content №4 2021)
- ... using shock-wave effects on a metal alloy containing non-diamond carbon. Methods of infrared and ultraviolet spectroscopy, X-ray phase analysis, electron paramagnetic resonance, isotope analysis, differential ...
- Created on 23 August 2021
- 32. Analysis of the regression model of the enterprise’s financial activity by research on residual error
- (Content №2 2021)
- ... of regression equations. Originality. For the first time, the application of residual error analysis as a random variable has been proposed in order to construct its conditional differential distribution ...
- Created on 29 April 2021
- 33. The synthesis of strategies for the efficient performance of sophisticated technological complexes based on the cognitive simulation modelling
- (Content №2 2021)
- ... Neural Network by Using Differential Search Algorithm for Solving Power Flow Problem. Advances in Electrical and Computer Engineering, 19(4), 57-64. https://doi.org/10.4316/aece.2019.04007. 20. Milov, ...
- Created on 29 April 2021
- 34. The optimal method for assessing gas reserves based on the calculation of gas hydrodynamic parameters
- (Content №2 2021)
- ... of the initial data for its use. The second is based on the differential, differential-integral, and integral methods to improve the accuracy of the calculated results. Practical value. The new methods ...
- Created on 29 April 2021
- 35. Dynamic loads in self-aligning gear transmissions of heavy loaded machines
- (Content №1 2021)
- ... gear self-alignment time, collision velocity during the alignment and dynamic load factor are obtained by integrating an ordinary differential equation. Methods of the linear theory for oscillations are ...
- Created on 05 March 2021
- 36. Direct method of studying heat exchange in multilayered bodies of basic geometric forms with imperfect heat contact
- (Content №1 2021)
- ... based on the reduction method, the concept of quasiderivatives, a system of differential equations with impulse action, the method of separation of variables, and the modified method of eigenfunctions ...
- Created on 05 March 2021
- 37. Optimization of heat production processes in the biofuel vortex combustion systems
- (Content №6 2020)
- ... modeling of the vortex combustion control system of uncertified fuel. A peculiarity of the study is the three-circuit interconnected proportional-integral-differential (PID) control of fuel and air dispensers ...
- Created on 22 December 2020
- 38. Enhancing efficiency of air distribution by swirled-compact air jets in the mine using the heat utilizators
- (Contens №5 2020)
- ... model for finite-element CFD. 2018 Fluid Dynamics Conference. https://doi.org/10.2514/6.2018-4041. 20. Lorin, E. (2019). From structured data to evolution linear partial differential equations. Journal ...
- Created on 30 October 2020
- 39. The analytic-field method for calculating the squirrel-cage induction motor parameters
- (Contens №3 2020)
- ... of the air-gap field curve, the differential scattering coefficient and the saturated values of the inductive scattering resistances are calculated according to empirical formulas, the calculated values ...
- Created on 02 July 2020
- 40. Enhancing the efficiency of gas distribution stations operation by selecting the optimal gas pressure and temperature parameters at the station outlet
- (Contens №3 2020)
- ... 457-466. https://doi.org/10.15330/pcss.20.4.457-466. 7. Krushnevych, S. P., Piatnychko, A. Y., Zhuk, H. V., & Soltanybereshne, M. A. (2016). The use of differential pressure at gas distribution ...
- Created on 02 July 2020