The work is aimed at modeling the control system of a slitting machine of a paper machine in order to improve the quality of products and eliminate defects in winding density. The developed automated system implements the functions of controlling the operating modes of the machine, distributing the loads of the bearing shafts, braking the roll and tensioning the paper web.

Keywords: slitting machine, paper machine, automated control system, rewinder, pressure roller, decoiler, reeler, accelerating shaft, deflecting shaft, cutting section

In this article, the object of study is the drying of plant products in a combined drying apparatus using infrared radiation, convection and reduced pressure. The process of drying products in the food industry is still relevant today in connection with the optimization of efficiency and reduction of energy consumption. In the presented experimental study, the following products are used: apples, bell peppers, bananas. The slice thickness varies from 5 to 10 mm. Observations show that, with optimal parameters and drying modes, the possibility of using the described drying installation is fully expedient.

Keywords: drying, infrared radiation, reduced pressure, convection, dried food, pilot plant

The article provides a comparative analysis of information systems for the computer-aided formation of educational and methodological support of a university according to the criterion of functional completeness. The analysis made it possible to systematize information on the functional completeness of software, to rank existing systems by the criterion of functional completeness, and to identify groups of similar systems. The effectiveness of the integration of educational and methodological information systems was studied to minimize the labor costs of university teachers.

Keywords: university, educational-methodical software, comparative assessment, functional completeness, automation, integration

In the present work we report on the study of local atomic and electronic structure of gold nanoparticles funnctionalised by thiol and amine containing long-chain ligands. The study of nanoscale atomic structure is performed by means of X-ray absorption spectroscopy (XANES: X-ray Absorption Near-Edge Structure) and computer simulation. In consequence of the experimantally obtained data analysis and computer simulation it was obtained that strong bonding takes place when 11-mercaptoundecanoic acid is bound to the gold nanoparticles surface, forming a chemical bond Au-S 0.25 nm in length. Weaker bonding is observed when forming bond between dodecylamine and gold nanoparticles surface atom resulting in Au-N bond 0.23 nm in length. Supplementary XANES spectra analysis by means of density functional theory reveals the nature of formation of the investigated nanoscale structure.

Keywords: nanoscale structure of matter, X-ray absorption spectroscopy, XANES, density functional theory, nanoparticles functionalisation