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$15 USD / hora
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dushanbe, tajikistan
$15 USD / hora
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Se unió el julio 18, 2023
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Ilyas V.

@IlyasVarsh

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$15 USD / hora
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dushanbe, tajikistan
$15 USD / hora
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Data scientist, Scientific researcher

Stack: Python & ML libs, Matlab Industry: Information & measurement, Fintech, Computer science Skills: ML, AI, Deep Learning, NN, Mathematic, Statistic, Data analysis, Data processing, Data preprocessing, Visualization, Algorithms
Freelancer Matlab and Mathematica Engineers Tajikistan
Ver todo Matlab and Mathematica Engineers en Tajikistan

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Portafolio

11178028
Dynamic pricing is frequently used in online marketplaces, ticket sales, and booking systems. The commercial principles of dynamic pricing systems are often kept secret; however, their application causes complex changes in human behavior. Thus, a scientific tool is needed to evaluate and predict the impact of dynamic pricing strategies. Publications in the field lack a common quality evaluation methodology, public data, and source code, making them difficult to reproduce. In this paper, a data-driven method, DPRank, for evaluating dynamic pricing systems is proposed. DPRank first builds a surrogate price elasticity of demand model using public data generated by a hidden dynamic pricing model, and then applies the surrogate model to build an exposed dynamic pricing model. The hidden and exposed dynamic pricing models were then systematically compared in terms of quality using a Monte Carlo simulation in terms of a company’s revenue. The effectiveness of the proposed method was tested on
Dynamic Pricing for the Open Online Ticket System: A Surroga
11178025
Dynamic pricing is frequently used in online marketplaces, ticket sales, and booking systems. The commercial principles of dynamic pricing systems are often kept secret; however, their application causes complex changes in human behavior. Thus, a scientific tool is needed to evaluate and predict the impact of dynamic pricing strategies. Publications in the field lack a common quality evaluation methodology, public data, and source code, making them difficult to reproduce. In this paper, a data-driven method, DPRank, for evaluating dynamic pricing systems is proposed. DPRank first builds a surrogate price elasticity of demand model using public data generated by a hidden dynamic pricing model, and then applies the surrogate model to build an exposed dynamic pricing model. The hidden and exposed dynamic pricing models were then systematically compared in terms of quality using a Monte Carlo simulation in terms of a company’s revenue. The effectiveness of the proposed method was tested on
Dynamic Pricing for the Open Online Ticket System: A Surroga
11178021
This study proposes a solution to the problem of railway demand forecasting on open data of a passenger railway company and search engines. A time series of web search queries is used as a predictor, and demand time series for train tickets is used as a target variable. The predictor is taken with a lag corresponding to the best correlation with the demand series. The LSTM, MV-LSTM, ARIMA, SARIMA, ARIMAX and SARIMAX models are used for forecasting. ARIMA-based models are used in 39 and 1 day forecasting experiments. SARIMAX model showed slightly better results in 1-day prediction experiments, however, the MV-LSTM model significantly improved the metrics due to the use of a predictor. The results of many experiments show the usefulness of using web search queries as a predictor for predicting passenger demand for rail tickets, the quality of the best model improved to 1.43 percentage points by MAPE and 76 by RMSE which is measured in terms of sold tickets, relative to models trained wit
Forecasting railway ticket demand with search query open dat
11178017
This study proposes a solution to the problem of railway demand forecasting on open data of a passenger railway company and search engines. A time series of web search queries is used as a predictor, and demand time series for train tickets is used as a target variable. The predictor is taken with a lag corresponding to the best correlation with the demand series. The LSTM, MV-LSTM, ARIMA, SARIMA, ARIMAX and SARIMAX models are used for forecasting. ARIMA-based models are used in 39 and 1 day forecasting experiments. SARIMAX model showed slightly better results in 1-day prediction experiments, however, the MV-LSTM model significantly improved the metrics due to the use of a predictor. The results of many experiments show the usefulness of using web search queries as a predictor for predicting passenger demand for rail tickets, the quality of the best model improved to 1.43 percentage points by MAPE and 76 by RMSE which is measured in terms of sold tickets, relative to models trained wit
Forecasting railway ticket demand with search query open dat
11178028
Dynamic pricing is frequently used in online marketplaces, ticket sales, and booking systems. The commercial principles of dynamic pricing systems are often kept secret; however, their application causes complex changes in human behavior. Thus, a scientific tool is needed to evaluate and predict the impact of dynamic pricing strategies. Publications in the field lack a common quality evaluation methodology, public data, and source code, making them difficult to reproduce. In this paper, a data-driven method, DPRank, for evaluating dynamic pricing systems is proposed. DPRank first builds a surrogate price elasticity of demand model using public data generated by a hidden dynamic pricing model, and then applies the surrogate model to build an exposed dynamic pricing model. The hidden and exposed dynamic pricing models were then systematically compared in terms of quality using a Monte Carlo simulation in terms of a company’s revenue. The effectiveness of the proposed method was tested on
Dynamic Pricing for the Open Online Ticket System: A Surroga
11178025
Dynamic pricing is frequently used in online marketplaces, ticket sales, and booking systems. The commercial principles of dynamic pricing systems are often kept secret; however, their application causes complex changes in human behavior. Thus, a scientific tool is needed to evaluate and predict the impact of dynamic pricing strategies. Publications in the field lack a common quality evaluation methodology, public data, and source code, making them difficult to reproduce. In this paper, a data-driven method, DPRank, for evaluating dynamic pricing systems is proposed. DPRank first builds a surrogate price elasticity of demand model using public data generated by a hidden dynamic pricing model, and then applies the surrogate model to build an exposed dynamic pricing model. The hidden and exposed dynamic pricing models were then systematically compared in terms of quality using a Monte Carlo simulation in terms of a company’s revenue. The effectiveness of the proposed method was tested on
Dynamic Pricing for the Open Online Ticket System: A Surroga
11178021
This study proposes a solution to the problem of railway demand forecasting on open data of a passenger railway company and search engines. A time series of web search queries is used as a predictor, and demand time series for train tickets is used as a target variable. The predictor is taken with a lag corresponding to the best correlation with the demand series. The LSTM, MV-LSTM, ARIMA, SARIMA, ARIMAX and SARIMAX models are used for forecasting. ARIMA-based models are used in 39 and 1 day forecasting experiments. SARIMAX model showed slightly better results in 1-day prediction experiments, however, the MV-LSTM model significantly improved the metrics due to the use of a predictor. The results of many experiments show the usefulness of using web search queries as a predictor for predicting passenger demand for rail tickets, the quality of the best model improved to 1.43 percentage points by MAPE and 76 by RMSE which is measured in terms of sold tickets, relative to models trained wit
Forecasting railway ticket demand with search query open dat
11178017
This study proposes a solution to the problem of railway demand forecasting on open data of a passenger railway company and search engines. A time series of web search queries is used as a predictor, and demand time series for train tickets is used as a target variable. The predictor is taken with a lag corresponding to the best correlation with the demand series. The LSTM, MV-LSTM, ARIMA, SARIMA, ARIMAX and SARIMAX models are used for forecasting. ARIMA-based models are used in 39 and 1 day forecasting experiments. SARIMAX model showed slightly better results in 1-day prediction experiments, however, the MV-LSTM model significantly improved the metrics due to the use of a predictor. The results of many experiments show the usefulness of using web search queries as a predictor for predicting passenger demand for rail tickets, the quality of the best model improved to 1.43 percentage points by MAPE and 76 by RMSE which is measured in terms of sold tickets, relative to models trained wit
Forecasting railway ticket demand with search query open dat

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Experiencia

Scientific Researcher

ITMO University
dic 2021 - dic 2022 (1 año)
Stack: Python and Data Science libraries (Numpy, Pandas, SciPy, TensorFlow, SciKit-Learn, Seaborn et al.), LaTeX. Industry: FinTech, Computer science Skills: Machine Learning · Deep Learning · Python (Programming Language) · Data Analysis · Optimization Algorithms

Assistant of the Department of Information and Measuring Systems and Technologies (ETU "LETI")

Saint Petersburg State Electrotechnical University "LETI"​
sept 2015 - jun 2022 (6 años, 9 meses)
Scientific and educational activities. Scientific: development and research of multichannel information-measuring systems. Educational: Metrology, Computer technologies in instrument making, Theoretical foundations of information and measuring equipment, Adaptive information and measuring systems, Bachelor's scientific director. Skills: Research Skills · Mentoring · University Teaching · Publications · Presentation Skills

Middle Software Developer

Saint Petersburg State Electrotechnical University "LETI"​
mar 2021 - dic 2021 (9 meses, 1 día)
Development of software for the automatic control system, collection, processing and analysis of measurement data. Skills: Machine Learning · Python (Programming Language) · Statistical Data Analysis · Data Analysis · Error Analysis

Educación

PhD (Russian PhD)

Sankt-Peterburgskij Gosudarstvennyj Elektrotehniceskij Universitet 'LETI', Russian Federation 2015 - 2021
(6 años)

Researcher. Lecturer-Researcher.

Sankt-Peterburgskij Gosudarstvennyj Elektrotehniceskij Universitet 'LETI', Russian Federation 2015 - 2019
(4 años)

Master

Sankt-Peterburgskij Gosudarstvennyj Elektrotehniceskij Universitet 'LETI', Russian Federation 2013 - 2015
(2 años)

Calificaciones

ArcGIS: Tools, functionality, and execution of analysis

Saint Petersburg State Electrotechnical University "LETI"​
2020
Data analysis in geographic information systems.

Frontiers of applied artificial intelligence: industrial, economics, education

ITMO University
2021
The school will be devoted to the development of promising AI technologies that form the methodological and algorithmic foundations of strong AI, which provides decision support in situations that exceed the cognitive abilities of an expert in complexity.

Publicaciones

Optimal Design of the Structure of an Adaptive Information-Measuring System

IEEE
The functioning of complex technical objects involves the use of information-measuring systems to obtain information about the environment and the state of devices within the system itself. At the same time, to prevent emergency and pre-emergency situations, it is important to receive timely information about the discrete state of the object, for example, information about the presence of sand in the flow of the produced hydrocarbons...

Dynamic Pricing for the Open Online Ticket System: A Surrogate Modeling Approach

Smart Cities
Dynamic pricing is frequently used in online marketplaces, ticket sales, and booking systems. The commercial principles of dynamic pricing systems are often kept secret; however, their application causes complex changes in human behavior. Thus, a scientific tool is needed to evaluate and predict the impact of dynamic pricing strategies. Publications in the field lack a common quality evaluation methodology, public data, and source code, making them difficult to reproduce.

Forecasting railway ticket demand with search query open data

Procedia Computer Science
This study proposes a solution to the problem of railway demand forecasting on open data of a passenger railway company and search engines. A time series of web search queries is used as a predictor, and demand time series for train tickets is used as a target variable. The predictor is taken with a lag corresponding to the best correlation with the demand series.

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Principales habilidades

Matlab and Mathematica
Scientific Research
Algorithm
Statistics
Machine Learning (ML)

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