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This book constitutes the refereed proceedings of the 9th International Conference on Computational and Information Technologies in Science, Engineering and Education, CITech 2018, held in Ust-Kamenogorsk, Kazakhstan, in September 2018.
The 25 revised full papers presented were carefully reviewed and selected from 64 submissions. The papers address issues such as mathematical and computer modeling, fundamental problems of mathematics, technological aspects of the applications of parallel computer systems, high level parallel programming languages and systems.

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Segmentation Algorithm for Surface Reconstruction According to Data Provided by Laser-based Scan Point.- Environmental Threat Calculation Dealing with the Risk of Industrial Atmospheric Emission.- Using an Ontological Model for Transfer Knowledge Between Universities.- Management of Oil Transportation by Main Pipelines.- IT Infrastructure of e-Health of the Republic of Kazakhstan.- Mathematical Model of Data Processing System for Information Support of Innovative Cluster Works.- Mechanics-Mathematical Model of Conjugation of a Part of a Trajectory with Conditions of Continuity, Touch and Smoothness.- Computer Modeling Application for Analysis of Stress-strain State of Vibroscreen Feed Elements by Finite Elements Method.- Applications of Parallel Computing Technologies for Modeling the Flow Separation Process behind the Backward Facing Step Channel with the Buoyancy Forces.- Numerical Study of a Passive Scalar Transport from Thermal Power Plants to Air Environment.- Applying Data Assimilation on the Urban Environment.- Computer Technologies for Gestures Communication Systems Construction.- Development of Information Systems for Scientic Research.- Modelling of Technological Processes of Underground Coal Mining.- Collection and Processing of Data to Optimize the Monitoring of Atmospheric Air Pollution.- Temperature Field Reconstruction of Flame from Images for Optimal Energy-Efficient Control of the Air-Fuel Mixture Making in Steam-Driven Boilers.- Quasi-geostrophic Wave Motion in a Rotating Layer of Electrically Conducting Fluid with Consideration of Dissipation Effects.- Parallel Implementation of Nonparametric Clustering Algorithm HCA-MS on GPU Using CUDA.- Numerical Algorithm for Solving the Inverse Problem for the Helmholtz Equation.- Implicit Iterative Schemes for Solving Stationary Problems of an Incompressible Fluid with a Large Margin of Stability.- Mathematical Modeling of Gas Generation in Underground Gas Generator.- Finite-element Method in Tasks of Loose Soil Erosion.- Stability Analysis of a Dierence Scheme for the Dynamic Model of Gas Lift Process.

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