Dergiler / Journals

Control of the technological process of obtaining polypropylene by alkalinizing, washing and drying the propane-propylene fraction (PPF)

2026-05-01T00:00:00Z

Control of the technological process of obtaining polypropylene by alkalinizing, washing and drying the propane-propylene fraction (PPF) Sardarov, Yagub; Zafarli, İlaha; Huseynova, Nargiz The work is devoted to the control of the technological process of obtaining polypropylene by alkalizing, washing and drying the propane propylene fraction (PPF). As a scientific innovation in the presented work, the following should be noted: 1) For the first time, a dynamic expert system has been created for the technological process of obtaining polypropylene by the above-mentioned method; 2) A dynamic database has been developed that provides storage and use of fractographic data used in the management of the technological process of obtaining polypropylene; 3) Appropriate instrumentation have been selected and their activities in the system have been provided for the full automatic implementation of the processes of production, primary processing and maintenance of the regime parameters of the technological process; 4) Algorithms for the initial processing of setting values of parameters for the management of the technological process have been developed; a complex of relevant programs for questioning and processing of transmitters has been created. To ensure the security of the database developed by me in SQL Server, it is first necessary to create users and assign them appropriate access privileges, including management, data editing, device addition, and other related operation.

Incorporating the influence of hunting cooperation and competition into the prey-predator model

2026-05-01T00:00:00Z

Incorporating the influence of hunting cooperation and competition into the prey-predator model Kareem, Huda Salah; Abd, Aseel Amer This mathematical model consists of three nonlinear ordinary differential equations between two prey (N1, N2) and only one predator (P). The two prey (N1, N2) grow logistically under predator pressure, and the predator depends mainly on the first prey (N1). According to function response Holling’s type II formula, indirect competition exists between N1 and N2 because the predator exerts strong pressure on first prey (N1), while second prey (N2) is affected more simply. Equilibrium points for the mathematical model between predator and two prey, which stabilize over time, were calculated, and the local stability around the equilibrium points of this proposed model was analyzed using the Lyapunov function. Finally, numerical simulation was used to demonstrate the results.

Higher-order accurate compact schemes and analysis for the time-fractional Black-Scholes model

2026-05-01T00:00:00Z

Higher-order accurate compact schemes and analysis for the time-fractional Black-Scholes model P., Muhammed Fayis; Meethal, Fathima Hida M. P.; Nadupuri, Suresh Kumar This work is focused on the construction of numerical schemes with higherorder accuracy in space and time to solve the time-fractional Black-Scholes model that governs the price of European options. We develop three numerical schemes utilizing the fourth-order Pad´e approximation, a fourth-order Taylor’s compact difference scheme and a fourth-order compact exponential scheme for spatial discretization. We employ L1-2-3 approximation of order 4 − α, 0 < α < 1, to discretize the time-fractional derivative.In addition, the solvability, convergence, and stability of these numerical schemes are established. Numerical experiments are conducted to demonstrate the accuracy of the proposed schemes and validate the theoretical findings. The new proposed schemes offer higher and better accuracy.

A characterization of E-completeness in vector metric spaces with an application in fixed point theory

2026-05-01T00:00:00Z

A characterization of E-completeness in vector metric spaces with an application in fixed point theory Mohanta, Sushanta Kumar; Das, Shubha The main purpose of this article is to introduce the notion of dᵥ-point in a vector metric space which is a generalization of the notion of d-point in metric spaces and extend Weston’s characterization of metric completeness to vector metric spaces in terms of dᵥ-point. In fact, we have utilized the concepts of lower semicontinuity and uniform continuity in this new framework to establish the main result. Finally, we established relations among minimal points, dᵥ-points and fixed points in this new setting. As an application of this study, we obtained the analogue of Banach Contraction Principle in vector metric spaces.