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Both in science and industry, tailor-made software and hardware systems simplify and speed up the process of obtaining new knowledge or creating new products. Geoscientists have come to rely on geodetic instruments, various sensors and analyzers (for determining physical and chemical properties of soils, air, rocks) and data processing software in their research. Hardware complexes always come with their original software for primary and secondary data processing. These complexes are often aimed at a range of user...

Web applications nowadays are quite a common asset for any big service-oriented organization. Communication and interaction are done very easily on the Internet. The purpose of this paper is to offer a close look at several web systems that work and fulfill the needs of the academic and student communities within University of Economics ? Varna. Those systems have been operating for a period of 3 to 5 years and continue to grow in scope. We present an in depth comparison of available software solutions on the open...

Regular measurement of rock deformation processes makes it possible to make judgments about the nature of the deformations of the Earth's crust, as well as the likely precursors of earthquakes near the area where these data are obtained. Therefore, the continuous operation of measuring devices that record such deformations is extremely important. When measuring by laser methods in a normal atmosphere, the distance of measurements can be significant, up to 25 meters and higher. The disadvantage of such measurements...

By now, compact satellites whose weight does not exceed 10 kg have become very popular. The low cost of such satellites? development, production and launch, developed recommendations and specifications have led to the explosive growth of the number of the launched nanosatellites. So, over 1100 nanosatellites have been launched as of January 2019. Nanosatellites are used in various scientific, practical and educational projects. Nanosatellites opened the way to space for some countries and allowed them to have thei...

If we create intelligent automated systems, decision support systems, expert systems, and in general knowledge-based systems then the development of the inference mechanism is very important. This mechanism of inference makes it possible to carry out reasoning on the available knowledge and data, to develop recommendations and decisions, to make their justifications and explanations. In this paper, a model of inference in the form of a bipartite graph is considered. The elements of the graph correspond to clauses,...

Optimization is an iterative iterative process of improving the distributions of distributed computer applications obtained through the reengineering process so as to ensure the efficient allocation of resources for the implementation of the stages included in the reengineering. The article mentions how to choose each new goal and studies the model already implemented to start the project. It starts from the design of the existing application, and then applies the succession of stages specific to re-engineering. O...

Spreadsheets often contain valuable data that are difficult to process due to an unclear structure. For this reason, spreadsheets also called semi-structured data. Table structure recognition and data extraction is an important area of research. Tables may contain statistical reports, schedules, grade books, results of research or product catalogue. Depending on the purpose, tables have a different structure. In this paper, the authors propose an approach for extracting information from "list" type spreadsheets. T...

3D modelling of the geology formations of the earth is an essential step towards understanding of complex geological phenomena and must be based on the whole of knowledge and available data for the study area (digital terrain models, geological and geophysical maps, sections, drill-holes and geological interpretation). 3D GeoModeller software made by Intrepid Geophysics Co. was designed to assemble together into the same 3D space data from various sources, in order to ensure geometrical coherence. For interpolatio...

Besides the effective traffic management on sections of the road network, important for large cities and metropolises, the problem of eliminating the negative consequences from the delay points is topical. The delay point is the part of the road network on which the vehicle has to stop or slow down due to obstacles. The greatest difficulty is the fight against unforeseen delay points that occur on multi-lane roads at an arbitrary time in an arbitrary location. Examples of such delay points include traffic accident...

The information system interface consists of various elements. Attention of the user decreases when working with a large amount of information. The authors suggest that it is possible to implement recommendatory (adaptive) modules for users, using changes in the graphical part of the interface. Such changes are called interface personalization. Personalization allows you to focus the user's attention on the most relevant elements of the user. To reduce the resource consumption of recommendation modules, it makes s...

This study is devoted to the problem of digital transformation impact on the world economic system in banking industry in terms of changing the existing business model of banks. It is shown that currently in the banking sector there is a growing trend of transition to digital services, which are more preferable for bank customers, thus displacing the traditional business model. These factors allow us to conclude that this direction is a priority for banking sector development in the medium term, while the digital ...

As known, all GIS (geographic information system) coordinate systems tied to the dynamic coordinate system. In this paper, the method of determining the orientation of the dynamic coordinate system in relation to the HCRF (Hipparcos Celestial Reference Frame) system is described. The lunar occultation observations (LOO) were used for this purpose. The photoelectric method of recording an LOO that allows obtaining LOO moment with an accuracy up to 0.001s (i.e. 100 times more accurately than by visual method) is the...

The purpose of our research is to develop methods, models and algorithms of cognitive geovisualization for regional management support systems. The paper describes the information technology of automated synthesis of cognitive user interface. The cognitive interface increases the efficiency of working with space-time data when solving spatial planning tasks. We used the methods of system analysis, conceptual modeling and ontological design of subject area. Special attention was paid to the issues of user interacti...

The presented paper is focused on digital image processing of medial temporal lobe (MTL) brain structure displayed in B-image. The analysis of the echogenicity grade of the MTL is an important part of Alzheimer?s Disease diagnosis. The image processing is based on the computation of the ratio of black/white pixels in square-shape Region of Interest (ROI) in which the MTL is visible. This ratio could correspond with the MTL echogenicity grade. For this analysis, the core of our developed computer application create...

The quality of spatial data plays a crucial role in environmental modelling and management, especially in local scale studies needing a detail mapping of vegetation elements in a mosaic, near-natural landscape. One of the sources of spatial data for such modelling is airborne LiDAR. Although LiDAR-based vegetation and terrain models are often considered accurate, their quality is dependent on the density of the original raw point clouds and the computation algorithm. The aim of this study was to answer a question ...

The changes of the welfare of the Russian citizens are explored in the paper. The time diapason taken into account is: 2000 ? 2018. The monthly wage index based on the Dynamic series of macroeconomic statistics of the Russian Federation data (2000-2018) has been explored. The mathematical models of the wage index of this time period have been presented. They are based on the ARIMA (p, d, q) models with p, q less than or equal to 5 (Autoregressive integrated moving average). Forecasts of these models are compared t...

This article describes the key features of the automatic speech recognition systems training process that can be used in a work of chat bot or voice assistant. Importance of research in this area is grazed. Difference between chat bot, voice helper and voice assistance are explained. Basic requirements for correct chat bot usage are formulated. Some common automatic speech recognition systems are reviewed. Kaldi and CMU Sphinx has been used as an open source systems? example. The whole installation and training pr...

In this paper, the artificial neural network (ANN) technique is used to predict the wear resistance e under dry sliding conditions of some iron-based powder metallurgy materials subjected to a thermochemical treatment. The analyzed specimens were obtained using the conventional powder metallurgy route: mixing the raw powders with 1% zinc stearate, cold compacting at a pressure of 400 MPa and sintering at a temperature of 1150°C for 60 minutes. Following the sintering step, the specimens were subjected to carburizi...

The core of renewable natural resources of any nation is its natural reserve fund. The issue of natural ecosystems preserving is becoming more and more actual at the present stage in terms of increasing human influence on the environment. The article presents methodical approaches to improving the system of background environmental monitoring, increasing of its objectivity and data submission visual aspects on the basis of GIS - technologies - taking into account the status, characteristics and specifics of protec...

In this article, we examine the questions of using an open-source software platform Open Simulator 0.9.0 for virtual reconstruction of historically significant industrial facilities in the form of a virtual museum. Virtual museums have extensive educational and research capacity and contribute actively to preservation of cultural heritage. The use of modern information technologies allows drawing attention to the monuments of historical and cultural importance, as well as forming their modern image, and causing a ...

The increasing computing power of modern hardware systems opens new possibilities for simulating complex solidification phenomena as well as the overall simulation of the casting process. Although the simulation of filling and solidification can be considered to be state of the art, the simulation of residual stresses and distortion is still the object of intensive research. Distortion is one of often found problems of castings, especially large castings with thin sections such as frame shape or those with curved ...

For the implementation of the management system and drawing for persons with special health needs using the device eye tracing is required to develop the minimal necessary set of commands. The command system is a tool for the user to interact with the system using only vision. Commands should provide the ability to control the following functions: tool selection, color selection, selection of shape (object), the choice of coordinates for drawing. The minimum set of commands that you need to control: move the mouse...

The importance of computers has become very popular, the interaction between man and machine is indispensable every day. People's need and desire to communicate with machines naturally led to the evolution of natural language processing. While progress is being made in this area, it is likely that voice interaction systems will replace most portable and digital devices such as keyboards, card readers, etc. This paper presents the main paradigms for speaker recognition, being one of the most important and needed bi...

A holistic approach to the design of ecological online services has been developed. The approach is based on the concept of the Internet of Things. Available online data includes local meteorological information and information on GPS coordinates of traffic flows. It allows to calculate in several seconds micro-weather characteristics, parameters of chemical and noise pollution of atmospheric air and parameters of algal processes of lakes and reservoirs. Verification of models of environmental online monitoring is...

Accessibility to urban facilities and public services is nowadays one of the key factors that impacts the quality of urban live. That being said, accessibility is a complex concept, which although in common use, has a range of meanings, and measuring it raises numerous methodological problems. For instance, accessibility is closely related to the concept of distance, but as a society evolves, other factors such as travel time, economic cost, different transport options, interest or attraction of the destination co...

In this study, we collected data from nine domestic Irish bank web sites and nine domestic Finnish bank web sites. Both countries have many similarities in political, demographical, financial and economical areas. Each of the selected banks represent a typical domestic bank, which is under the control of the respective national central bank. The results of the study could be used as a guide for good and bad practices because of highly qualified personnel employment in the credit institutions, decisions are based u...

Digital ecosystems represent a new technology capable of interconnecting heterogeneous, cross-domain platforms, able to drive innovation in different industries, enabling us to connect and operate with a wide range of actors, customers, partners, companies. Digital ecosystems can be considered as socio-technical clusters of adaptive applications with different levels of context awareness, adaptability and autonomicity. The adaptive properties of an organism are closely related to the self-organizing property and t...

Study of wave motions fluid is one of the most important and complex problems of modern hydrodynamics. This issue is receiving significant attention in fluid mechanics, hydraulics, acoustics, oceanography and physiology of circulation. Special mention should be made of the relevance of the objectives of the movement body of finite size in fluid, ship hydrodynamics tasks, tasks construction of coastal protection, as well as the increasing interest in modeling the planet's climate. The fluid flows in the presence of...

The demand for an indoor navigation service is increasing as indoor positioning technology is developed, therefore it is necessary to construct indoor network data that can be directly used for navigation. In this study, indoor network data were constructed using indoor evacuation map images, which can be easily obtained. The evacuation route in the map can be used as network information because it represents the connection between each room as well as the connection between room entrances and the main entrance of...

Approximation of multi-extremum functions problems arise in a wide range of fields including deterministic and stochastic technics, multi-parameter optimization. The main focus of this thesis is to consider the different principle of approximation problem. Experimental definition of external impacts on complex technogenic systems is related to technical difficulties. This area of research arises from the fact that many problems of multi-extremum optimization are known to be computationally difficult (NP-hard). We ...

Petri nets is the well-known mathematical tool for the modeling and verification of parallel systems of all kind. Multiprocess Petri multinets with time stamps (MPTSM) are the newly introduced class of low-level Petri nets, whose definition and the properties are the main topic of this article; they generalize the properties of P/T Petri multiprocess multinets in the area of design, modeling and verification of generally parallel programming systems with the discrete time. The MPTSM with the support of the ASYNC-C...

Process and plant design need to be continuously improved, the use of new safety concepts to a full extent being one of the key parameters leading to their sustainable improvement. Accidents occurred over time in industrial facilities where explosive gas or vapor atmospheres may be present have put the explosion risks high on the agenda of regulators, operators, accident investigators or researchers in the field. Accidental flammable gas leaks in mixture with air may generate explosive atmospheres which once ignit...

This article presents an approach for managing and comparing data, concerning some main food products in Bulgaria. The source for the search of these product categories (bakery products, milk and milk products, fish and fish products and etc.) is the created relational database. The extracted data for the selected category have been grouped, compared and processed. The obtained results enable the user to present relevant conclusions for the examined time interval. This approach is applied to the data on bread and ...

The transition to advanced digital, intelligent production technologies, the creation of systems for processing big amounts of data, machine learning and artificial intelligence is caused, among other things, by the need to move to a new level of digital energetics, which ensures the interrelationship between the generation, distribution and consumption of energy resources and their effective management. The efficiency of the use of energy resources is one of the urgent problems in the energy sector. One of the pr...

In this research we investigate the significance of the CGAL library which is a source of algorithms related to computational geometry. We briefly describe the exact computation paradigm that provides obtaining reliable geometrical results. We present the advantages of using the CGAL library in terms of investigating certain parameters of geological planar structures. We show that several parameters that can be computed and attributed to considered planes and subsequent use of further statistical methods becomes p...

The advancement of tracking technologies such as RFID (Radio Frequency Identification) in recent years supported the study area of shopping behavior of consumers in retailing setting has globally regained increased interest. However, only few studies have attempted to analyze consumer shopping behavior using the RFID data. The purpose of this paper is to propose the framework based on behavioral and environmental variables, which can be tested using the RFID data obtained from the recent experiment in one of the s...

The sudden and intensive variations of the ionosphere could be represented through its basic property ? electron density which is the main parameter concerning radio propagation through this part of the atmosphere. It is radio sounding as one of the main measurement methods applied among numerous methods for electron density estimation suitable for different ionosphere sub-regions monitoring as a part of the remote sensing Earth observation technics. Collecting VLF/LF (3-300 kHz) radio sounding data which reflect ...

The machines used in hard coal mining must exhibit very good technical, safety and reliability parameters. These parameters determine their efficiency, operational safety and effectiveness of the entire production process. The last several decades have seen increased mechanisation of the mining process. Increasingly more cutting-edge and efficient machines have been used for this purpose. Attempts have also been made to partially or fully automate the process of mining. The concept of an ?intelligent? mine has com...

Ecological and resort area of Caucasian Mineral Waters occupies a special place among the resort regions of Russia due to the richness, diversity, quantity and value of mineral waters, landscape and climatic conditions, therapeutic muds. The pace of development of mineral water resources for the resort and industrial bottling has recently increased. The increase in the number of enterprises for bottling mineral water and organizations of sanatorium-resort type has a significant impact on the growth of water intake...

The article deals with the synthesis of a closed distributed control system for the drill temperature field. The technique is developed on the basis of the the temperature fields control function. The analysis and modeling of the drilling process during the passage of the drill through the variable environment (ice-ground-ice-water-ice) are performed with taking into account the drill heating. To increase the productivity of the passage, it is proposed to use sectional heating of the drill instead of the existing ...

The aim of this study is to determine the geocenter dynamics described by dynamic adaptive regression and the general laws of DORIS and GPS navigation systems. A spatial geocenter dynamics can be represented as coordinate and time series. Mathematical description of the time series allows for determination of systematic change in the geocenter dynamics. To improve the accuracy of modeling and forecasting of the geocenter dynamics and to identify the regular effects, the dynamic regression modeling approach is used...

The comparative analysis of approaches to the management of surface water bodies in Ukraine, taking into account the provisions of the European Union (EU) Directive on river basin management plans in monitoring surface waters using geoinformation systems (GIS). The main deficiencies of the system of state monitoring of surface waters are identified. The introduction of GIS technologies for estimating and predicting changes in surface waters is proposed to take the necessary measures for the adoption of environment...

An algorithm for extracting information on the types and subtypes of soils for each pixel of big data sets of remote sensing on agricultural lands is proposed. For this, a mathematical apparatus for constructing a multi-temporal (empirical) soil line is used. The classical soil line (SL) is defined in the RED-NIR spectral space by two coefficients "a" and "b" [2, 6, 9]. In this form, SL does not characterize soil types and subtypes. A multi-temporal soil line (MSL) is the major axis of an ellipse that describes al...

The paper deals with the problem of evaluating the characteristics of information systems at the design stage. In the design of ERP-systems the most interest characteristic is not the average time, but the probability of timely delivery of different type messsages (for example, command, service, multimedia, files, etc.) from the sender to the recipient. In addition, the possibility of using the priority information management built on the basis of service disciplines of general form with mixed priorities must be c...

This paper describes an analysis of concrete pavement loading while taking into account deflections and deformations. Concrete pavements are generally durable and have low demands on maintenance within their whole lifecycle. The first part describes an experimental road test section with verified material characteristics of individual pavement construction layers by laboratory and non-destructive testing. Furthermore, the position of temperature sensors in road structure is described, together with loading data an...

For processing observations of the terrestrial pole dynamics, the regression dynamic modeling (RDM) approach was used. With the RDM software package the models describing the dynamics of the terrestrial polar coordinates were built. This approach provides accurate combined models of observations which describe to some extent causal and deterministic communication and provide forecast of characteristics. A comparison of observations and predicted values of the terrestrial polar coordinates obtained with the RDM app...

The estimation of groundwater levels in a basin is a very important factor for planning integrated management of groundwater and surface water resources. In this study, artificial neural network models have been developed for predicting and forecasting of groundwater level. The reliability of the computational models was analyzed based on simulation results and using three statistical tests including Pearson correlation coefficient, coefficient of determination and root-mean-square error. The artificial neural net...

Accurate prediction of reference evapotranspiration (ET0) is essential in water resources planning and management of irrigation systems. The ET0was determinate using the FAO-56 Penman-Monteith equation based on the weather data collected in Serbia during the period 1980-2010. The purpose of this research is to develop and apply the Extreme Learning Machine (ELM) to estimate and calculate the ET0. The process was implemented for eight input combinations in order to find the most optimal input combination for ET0 pr...

The paper deals with the problem of the influence of non-normative errors on the process of induction soldering of space vehicles waveguide paths. The application of the method of neural network modeling is proposed to solve the problem posed, which is a problem of classifying the errors of measuring instruments. As a tool, Deductor Academic software is used, which allows to conduct a wide range of analytical studies. The work presents the development of the structure of an artificial neural network for the classi...

Machine learning covers a wide set of supervised and unsupervised algorithms for solving prediction, classification and anomaly detection problems. One of the areas of their applications is for customer churn prediction. To build a model for predicting the switching of customers, data scientists use different demographics, social, transactional, behavioural metrics and features. At the same time, most of the small Bulgarian companies still don?t have the needed versatile and complete customer data. They rely mainl...