A Unified Approach to the Synthesis of Hypercomplex-Valued CORDIC-like Algorithms -- Electrodynamic Simulation of a 4x4 Butler Matrix Beam-Forming Device with Static Phase Shifters.-Torsional Vibration Monitoring Using Mems Accelerometers -- Calculations of Ejector Pump Operating Conditions After Hydraulic Fracturing -- Non-Markov General Model of the Functioning of the Robot Control System in Changing Environmental Conditions -- Digital Platform "Smart School" Reverse Engineering of a Prototype Electromagnetic Hybrid Propulsion System for an Underwater Vehicle -- Dynamic Coding with Orthogonal Frequency Division in Co-located Radar Communication Systems -- Synthesis of Electric Motor Characteristics of an Unmanned Ekranoplan -- Multi-criteria Software Selection of a Logical Process Control System -- Multi-mode Control of Technical and Technological Systems: Analysis of Construction Methods and Areas of Effective Application -- Neutral Buoyancy Power Systems for Marine Applications -- Rationalefor the Selection of Intelligent Multi-Mode Automatic Control Systems by Means of Pairwise Comparisons of Alternatives -- Study of Coolant Properties in Ship Cooling Systems and Thermal Conductivity of Aqueous Salt Solutions -- Positioning of Generators with a Free Piston Reverse Electromagnetic Damper -- Direct E-Drives in Hydraulics -- Power Control in Generators with Free Piston and Current Balancing by Artificial Homogeneous Line.