Aleksei B. Makhovikov

Saint Petersburg Mining University · Institute of Basic Engineering Education

Theoretical and applied aspects of scenario analysis of investment projects of enterprises in the mineral resource sector of the economy are considered, its advantages and disadvantages are analyzed. Taking into account the organizational and economic features of mineral resources management, a number of new modifications of the scenario analysis m...

The evolution of digital support for scientific research and the educational process at the St. Petersburg Mining University from the 1960s to the present is examined. Based on the analysis of scientific literature and documents stored in the archives of the Mining University, the features of providing computer equipment, as well as managing the co...

The paper is devoted to the analysis of the current and the forecast of the prospective state of introducing digital technologies into the oil and gas mining industry of the Russian Arctic. The authors of the paper analyzed the global trends that define the process of digital technologies’ introduction into the oil and gas mining industry. They als...

The paper is devoted to the development of the structure of a fast and flexible data collecting system based on the proposed approach to measure power quality indicators in three-phase medium-voltage distribution grids with an example of a Mikhailovsky mining and processing plant. The approach utilizes the properties of a space vector, obtained fro...

The paper considers a secure information transfer protocol for corporate IP-telephony system. In the article are analized the advantages and disadvantages of the known protocols. A description of the process of establishing a connection, sending text messages and voice communication in the developed protocol is given. Its practical significance and...

Small-scale production of liquefied natural gas (SS LNG) is a promising, but little-known direction of the gas industry development, which is aimed at meeting the needs for environmentally friendly decentralized energy supply of nearby regions. In this study, an economic efficiency of four energy generation options, based on SS LNG, with nominal ca...

The aim of the research was to identify the relationship of students’ satisfaction with the study of the discipline and interaction with the university teacher, including the features of mutual perception. The following objectives were formulated: to conduct a questionnaire survey of students identifying their satisfaction with interaction with the...

Students’ satisfaction with the academic service quality is ranked among the key indicators of the education system efficiency, with the satisfaction interpreted as the individual emotional comfort due to the educational environment and its products meeting the individual expectations, hopes and needs. Academic progress and comfort may be measured...

The paper analyses territory zoning methods with varying degrees of anthropogenic pollution risk. The summarized results of spatial analysis of oil pollution of surface water in the most developed oil-producing region of Russia. An example of GIS-zoning according to the degree of environmental hazard is presented. All possible algorithms of cluster...

The aim of our study was to develop specific methods that make possible to identify and visualize focuses of ecosystem pollution for the determinationof the permissible anthropogenic impact boundaries and prediction of their development. The two-level spatial zoning method is considered through the example of an environmentally unfavorable region o...

The study addresses the issues of development and functioning of the software and hardware system intended to provide secure and reliable communications for remote corporate subscribers over the networks with cellular or wireless internet access. The system requirements necessary to maintain secure connection of end users are indicated and discusse...

The objective of this research is the study of the problem of the lack of high-quality geospatial data needed for designing customized GIS projects. It is suggested to solve the problem by using free network resources of vector and raster data with diverse spatial resolution and area coverage which are in open access. The study describes the larges...

In this paper, we present a method for automatic detection of word pronunciation errors. This method is based on Automatic Speech Recognition (ASR) technologies and uses a combination of two acoustic modeling methods: Hidden Markov Models (HMM) and Vector Quantization (VQ). The probability-based normalization technique evaluates the average quality...

The description of system for full-duplex speech communication through Internet is presented. The frame-independent codecs at rates 4800, 9600 and 19200 bps were used for speech compression. The special protocol based on User Datagram Protocol (UDP) was used for data transmission. The paper consists from three parts. In the first part we briefly sh...

In this paper the use of Hidden Markov Models for the evaluation of the Russian words pronunciation by the foreigners is considered. The average distortion of the codebook and the likelihood of the discrete variable duration Hidden Markov Model are used. Such model allow to take into account the temporary characteristics of a speech signal, which a...