synthesis

In modern industry, the most widely used are adjustable electric drives of the ‘Frequency converter - induction motor’ (FC-AM) system, in which integer-order controllers are mainly implemented and used. The use of fractional-order controllers in electromechanical FC-AM systems allows to ensure: higher quality of transition processes, increase the stability margin and reliability of the system, higher robustness to changes in motor parameters and, as a result, guarantees higher performance compared to classical integer controllers.

 Alkaline salts of maleated diethanolamides of fatty acids of vegetable oils have been synthesized - effective multifunctional additives that improve the technological and operational properties of dry building mixtures. A key advantage of the synthesized compounds is the use of accessible and renewable raw materials. The most pronounced overall effect was observed for the potassium and, especially, the lithium SMDFA, indicating the need for further in-depth studies.  

The paper analyses the system characteristics and functional capabilities of multi-bit pyramidal adders that can be used in the structures of discrete perceptron of modern neural networks for summing weight coefficients and input signals. The methodology for designing multi-bit adders using flow and spatial-temporal graphs is described. Algorithmic and recursive pyramidal adders have been developed and their main system characteristics have been determined.

A series of 3-(1-R-5-phenyl-1H-pyrrol-2-yl)propanoic acids (R = H, Ar, Alk, Hetaryl) was obtained via the reaction of 4,7-dioxo-7-phenylheptanoic acid with amines. The enthalpies of vaporization and fusion of eight compounds were experimentally determined using differential thermal and thermogravimetric methods of analysis for the first time.

This paper presents a comprehensive investi- gation and hardware implementation of a multi-bit Brawn matrix multiplier architecture. The research focuses on analyzing the system characteristics of binary multipliers realized with both conventional and optimized full and half adders. Particular attention has been given to the applicability of such multipliers within arithmetic logic units (ALUs) for vector and scalar processing architectures. Analytical models have been formulated to quantify hardware resource utilization and computational latency across various logic base configurations.

The work proposes a comprehensive approach to the synthesis of the coefficients of PI- and PID-controllers, as well as the coefficients of feedback based on the state variables of the system, using the feedback linearization method for the synthesis of control influences. This approach considers not only the static but also the dynamic characteristics of the system, allowing for higher control accuracy. The feedback linearization method facilitates the transformation of nonlinear systems into linear ones, simplifying their further analysis and controller design.