Изображение профиля vladishat
Флаг Ukraine Slavutych, Ukraine
На сайте с 4 декабря 2016 г.
6 Рекомендации


В сети Офлайн
Coherent professional with a problem-solving mentality accompanied by many years of researching and teaching experience in Ukrainian universities. With superior quality in data modeling and simulation, I am confident my work will exceed expectations. Specializing in: - Projects pertaining to Statistical/Data Analysis, Machine Learning, Mathematics, and Physics. - Consulting Businesses through Financial/Inventory/Customer Data Analysis and Forecast. Skills that pertain to this project are the following: - Excellent Communicator - Problem-solver - Attention to detail - Analytical Thinker Analysis Skills: - Multivariate Statistical Analysis - Regression Analysis - Factor Analysis & Sensitivity Analysis - Bayesian Analysis - Monte Carlo Analysis - Experimental Designs - Time Series Analysis - Forecasting - Statistical Quality Control - Spatial Data Analysis - Structural Equation Modeling. Program Proficiency: - R programming - Rapidminer - Matlab - Python - Microsoft Excel. I do not outsource my work; I am a one-man team. Mostly available from 9:00 to 19:00 GMT+2
$25 USD/hr
77 отзыва(-ов)
  • 100%Выполненные работы
  • 93%В рамках бюджета
  • 96%Своевременность
  • 25%Рейтинг повторного найма

Элементы портфолио

Последние отзывы

  • изображение Pete W. Project for Volodymyr S. -- 3 $156.13 CAD

    “Excellent work and a pleasure to work with! Thank you Volodymyr!”

  • изображение Pete W. Project for Volodymyr S. -- 2 $51.00 CAD

    “True expert and excellent work! Thank you, Volodymyr!”

  • изображение Pete W. Project for Volodymyr S. $90.00 CAD

    “Volodymyr is very professional and a pleasure to work with. I will definitely be hiring him again! A+ service as always. Thank you!!”

  • изображение Mon F. Project for Volodymyr S. -- 20/05/25 16:13:35 €57.50 EUR

    “Volodymyr helped me to understand again some inferential statistic methods that I had almost forgotten.”

  • изображение Md G. Project 25852654 has been deleted $25.00 USD

    “It was a pleasure working with this freelancer. He is a very professional and cooperative gentelman, everything was done perfectly and on time. Highly recommended.”

  • изображение Ramesh Reddy P. Project for Volodymyr S. -- 10376 ₹4000.00 INR

    “Great work as always!!”

Опыт работы


Sep 2014 - Aug 2018 (3 years)

My responsibilities included educational and scientific work, lectures on Artificial Intelligence, Data Mining, Decision Theory, Theory of Algorithms, Mathematical Modelling, Web-technology, and Web-design.


Sep 1999 - Aug 2015 (15 years)

Lectures and scientific researches on Biophysics, Electromagnetic fields effects, Germicidal effect of high pressure food processing.


Doctor of Science (1991)

National Academy of Sciences of Ukraine

Doctor thesis "Effects of the band structure of solids in the inelastic scattering of slow electrons"


Hierarchy of categories and classifying Wikipedia articles using XML dump

A hierarchical object is built from relationships between categories and their parents. It is used in a classifier, detecting if an article belongs to possibly far parent category. Available at: [login to view URL]

Parsing Wikipedia XML dump

Article presents pretty simple parser for "pages-articles" XML dump file, capable of extracting body texts of pages, titles of pages with categories a page belongs, and names of categories with their parent categories. Body texts are not cleaned from markup, in particular because it may contain important information. For each Wikipedia's article page, calculate number of references to it from other pages. Available at: [login to view URL]

Hidden revolution of human priorities: An analysis of biographical data from Wikipedia

A study of Wikipedia biographical pages is presented. It is shown that the dates of some historical cataclysms may be reproduced from peculiarities of lifespan changes over time. Categories were merged in just two classes. Being quite constant during almost the entire history, its ratio shows a sharp jump at the end of the 20th century mainly due to growth of Sport and Art groups over all others. Available at: [login to view URL]

Mapping of X-ray contamination. A digital model

This is a digital search and mapping of X-ray sources by means of a stationary set of sensors placed around the contaminated object. The problem was solved by the genetic algorithm. It was shown that in some cases of four and more detectors the X-ray sources may be mapped if their number does not exceed much the number of detectors. Keywords: Gamma-ray imaging, contamination, mapping, genetic algorithm. [login to view URL]

Sliding Mode Control of a solar power plant at weather fluctuated irradiance

Matlab/Simulink model of Sliding Mode Control was built to optimize a solar panel performance at a fluctuating by weather irradiance. This dynamic model shows a high performance relative to the pre-calculated Maximum Power Point Tracker, which may significantly improve the outcome of a solar power plant. Keywords: INUDECO, solar power plant, Matlab, Simulink, Lyapunov function. [login to view URL]


  • Preferred Freelancer Program SLA
  • US English Level 1


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