This book constitutes the refereed post proceedings of the 17th International Conference on Parallel Computational Technologies, PCT 2023, held in Saint Petersburg, Russia, during March 2830, 2023.
The 25 full papers included in this book were carefully reviewed and selected from 71 submissions. They were organized in topical sections as follows: "High Performance Architectures, Tools and Technologies", "Parallel Numerical Algorithms", and "Supercomputer Simulation".

Inhalt
**High Performance Architectures, Tools and Technologies.- ** Evaluating the Impact of MPI Network Sharing on HPC Applications.- Parallel Data Preprocessing Library for Neural Networks Training.- An Efficient LRnLA Algorithm and Data Structure for Manycore and Multicore Computers with Hierarchical Cache.- **Parallel Numerical Algorithms.- ** Implementation of a Fuzzy Inference Method with Nonsingleton Fuzzification Based on CUDA and GPGPU Technologies.- Solving the Three-Dimensional FaddeevMerkuriev Equations via Spline Collocation and Tensor Product Preconditioning.- Monitoring and Forecasting Crop Yields.- On Parallel Multigrid Methods for Solving Systems of Linear Algebraic Equations.- Optimized Relativistic Code for Massive Parallel Systems.- Using Parallel SAT Solving to Study Hard Combinatorial Problems Associated with Boolean Circuits.- Parallelization of the Generalized Multimode Nonlinear Schrodinger Equation Solver: a Performance Analysis.- On the Template Programming Approach for Shared Memory Parallel Architectures with Applications to the Fully Implicit Stokes Solver.- Parallel Computing in the Tikhonov Regularization Method for Solving the Inverse Problem of Chemical Kinetics.- Parallel Implementation of the Time-Reversal Mirror Method for Recovering the Position and Type of a Seismic Source from Observational Data.- Parallel Implementation of Fast Algorithms in the Vortex Particle Method.- **Supercomputer Simulation.- ** Implementation of an Asymptotically Compact Algorithm for GPU Simulation of an Acoustic Equation.- Quantum-Chemical Simulation of High-Energy Azoxy Compounds.- Parallel Algorithms for Simulation of the Suspension Transport in Coastal Systems Based on the Explicit-Implicit and Splitting Schemes.- Parallel Numerical Implementation of Three-Dimensional Mathematical Models of Hydrodynamics Taking into Account Vertical Turbulent Exchange.- Comparison of Two Methods for Modelling the Dynamics of Gas Flows in a Protoplanetary Disk.- Computer Modeling of Metal Nanoclusters and Substrate Interaction at Mesoscopic Level.- Supercomputer Simulation of Plasma Flow in the Diamagnetic Mode of Open Magnetic Systems.- Computer Simulation of the Three-Dimensional Synthesis of Phase Images of Nanometer Scale Objects.- A Parallel Algorithm for a Two-Phase Gas-Solid-Particle Model with Chemical Reactions and Laser Radiation.- MPI-based Computational Algorithm for Modeling a Cylindrical Catalyst Grain during Oxidative Regeneration.- Research of the Influence of the Thermal State of an Air-Intake Model on In-Flight Icing Conditions.