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Wyświetlanie 1-15 z 44
Tytuł:
Modeling of the User’s Identification Security System of on the 2FA Base
Autorzy:
Ussatova, Olga
Nyssanbayeva, Saule
Wójcik, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/1844625.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
two-factor authentication
data security
user identification
password generator
Opis:
The article describes methods of user identification using authentication based on the second factor. Known algorithms and protocols for two-factor authentication are considered. An algorithm is proposed using mobile devices as identifiers and generating a temporary password based on the hash function of encryption standards. For an automated control system, a two-factor authentication model and a sequential algorithm for generating a temporary password using functions have been developed. The implementation of the system is based on the Node.js software platform using the JavaScript programming language, as well as frameworks and connected system libraries. MongoDB, an open source database management system for information storage and processing was used.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 235-240
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development Of A Monitoring System For Electric Power Substations Based On Ios And Implementation Of Designs On FPGA
Autorzy:
Kalimoldayev, Maksat
Wójcik, Waldemar
Shermantayeva, Zhazira
Powiązania:
https://bibliotekanauki.pl/articles/27311962.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
IoT Internet of Things
FPGA
GPS
NAS
Opis:
In this article, a monitoring system based on IoT technologies of the substation electrical system in the Republic of Kazakhstan was developed. At the moment, the operation of power systems is extremely important to maintain the frequency of electric current over time. For management and monitoring applications, it is necessary to take into account communication within acceptable limits. IoT technologies are considered the main functions in applications for monitoring and managing energy systems in real time, as well as making effective decisions on both technical and financial issues of the system, for monitoring the main form of data registration on an electric power substation in the city of Shymkent of the Republic of Kazakhstan, for consistent effective decision-making by system operators. In this work, an Internet of Things-based monitoring system was implemented and implemented for the substation of the power system using a specialized device built into the FPGA controller for fast integrated digitalization of transformer substations of real-time distribution electrical networks. The IoT platform also provides complete remote observability and will increase reliability for power system operators in real time. This article is mainly aimed at providing a practical application that has been implemented and tested.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 4; 819--824
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of wind energy complex automation system
Opracowanie złożonego sytemu automatyzacji energetyki wiatrowej
Autorzy:
Mussilimov, Kuanysh
Ibraev, Akhmet
Wójcik, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/407807.pdf
Data publikacji:
2019
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
wind energy
automation of wind turbine
wind farm monitoring
energia wiatrowa
automatyzacja turbiny wiatrowej
monitoring farm wiatrowych
Opis:
Wind power is one of the three main renewable energy sources, along with solar and hydropower, which are widely used to produce electricity worldwide. As an energy resource, wind is widespread and can provide electricity to much of the world, but it is both intermittent and unpredictable, making it difficult to rely on wind power alone. However, when used in combination with other types of production or in combination with energy storage, wind can make a valuable contribution to the global energy balance. Over the past few decades, wind power has emerged in a number of countries as a separate energy sector that has successfully competed with conventional energy. Attention is paid to wind power plants (WT) as part of distribution and transmission networks. In this regard, an urgent scientific and technical task is the efficient use of wind potential, which is not only to improve aerodynamic characteristics WT, but also to increase productivity WT as a whole. This article presents the type of wind turbines, among the possible applications and very promising is the wind turbine Bolotov (WRTB), which by its technical characteristics surpasses the traditional propeller and other installations using wind energy in the production of electrical energy. The increase (WEUF - wind energy utilization factor) in all modes of operation WT by improving various methods of automatic control is relevant, and the proposed work is devoted to this issue.
Energia wiatrowa jest jednym z trzech głównych źródeł energii odnawialnej, obok energii słonecznej i wodnej, które są szeroko wykorzystywane do produkcji energii elektrycznej na całym świecie. Jako źródło energii, wiatr jest szeroko rozpowszechniony i może dostarczać energię elektryczną do wielu części świata, ale jest on zarówno nieciągły, jak i nieprzewidywalny, co sprawia, że trudno jest polegać wyłącznie na energii wiatrowej. Jednakże w połączeniu z innymi rodzajami produkcji lub w połączeniu z magazynowaniem energii wiatr może wnieść cenny wkład w światowy bilans energetyczny. W ciągu ostatnich kilkudziesięciu lat energia wiatrowa pojawiła się w wielu krajach jako odrębny sektor energetyczny, który z powodzeniem konkurował z energią konwencjonalną. Szczególną uwagę zwraca się na elektrownie wiatrowe (EW) w ramach sieci dystrybucyjnych i przesyłowych. W związku z tym pilnym zadaniem naukowym i technicznym jest efektywne wykorzystanie potencjału wiatru, co ma na celu nie tylko poprawę właściwości aerodynamicznych turbin wiatrowych, ale również ogólne zwiększenie wydajności turbin wiatrowych. W artykule przedstawiono typ turbin wiatrowych, wśród możliwych zastosowań i bardzo obiecujący jest turbina wiatrowa Bolotov (WRTB), która swoją charakterystyką techniczną przewyższa tradycyjne śmigło i inne instalacje wykorzystujące energię wiatrową w produkcji energii elektrycznej. Istotne jest zwiększenie (WEUF - wind energy utilization factor) we wszystkich trybach pracy turbin wiatrowych poprzez udoskonalenie różnych metod automatycznej kontroli, a proponowane prace poświęcone są tej kwestii.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2019, 9, 2; 36-40
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Motor Fuels and Energy – Producing Fuels Generation Based on the Processing of Municipal Solid Waste Organic Components
Autorzy:
Temirbekova, Marzhan
Wójcik, Waldemar
Stoyak, Vyacheslav V.
Powiązania:
https://bibliotekanauki.pl/articles/1955452.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
municipal solid waste
bioethanol
fermentation
ethanol fermentation
Opis:
Municipal solid waste management and its disposal are considered one of the major challenges facing the urban communities around the world. Effective solid waste treatment involves a variety of approaches, treatment technologies and concepts to ensure the protection of public health and the environment. Waste landfill is the method most commonly used worldwide, despite all the significant environmental, health and economic consequences. Thus, alternative methods such as the municipal solid waste pretreatment, fermentation, ethanol fermentation and anaerobic fermentation have been the focus of heightened attention. Using these methods, an alcohol-containing liquid was obtained from 1.5 kg of the organic fraction of municipal solid waste (OFMSW), which had an ethanol percentage of 97.45%. Consequently, if properly managed and used, municipal solid waste can be a viable source of energy rather than a source of pollution.
Źródło:
Journal of Ecological Engineering; 2021, 22, 7; 73-80
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Intelligent Control Methods for the Ore Jigging Process
Autorzy:
Kulakova, Yelena
Wójcik, Waldemar
Suleimenov, Batyrbek
Smolarz, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1844513.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
neural network
ore jiggling
control algorithm
fuzzy logic
correlation
Opis:
Efficient control of the process of jigging ore of small and fine grain allows avoiding the loss of valuable material in production residual. Due to the multi-dimensionality and multi-connectivity of this enrichment process, classical control methods do not allow achieving the maximum technological indicators of enrichment. This paper proposes investigating intelligent algorithms for controlling the jigging process, which determine the key variables - the level of the natural «bed» and the ripple frequency of the jigging machine. Algorithms are developed using fuzzy logic, neural and hybrid networks. The adequacy of intelligent algorithms was evaluated using the following criteria: correlation of expert and model values (R); Root Mean Square Error (RMSE); Mean absolute percentage error (MAPE). To assess the adequacy of the obtained algorithms, a test sample of input variables, different from the training one, was compiled. As a consequence, we determined an algorithm that gives a minimal discrepancy between the calculated and experimental data.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 3; 529-534
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil Salinity Classification Using Machine Learning Algorithms and Radar Data in the Case from the South of Kazakhstan
Autorzy:
Merembayev, Timur
Amirgaliyev, Yedilkhan
Saurov, Sultan
Wójcik, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/2202157.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
environmental correlation
soil salinity
machine learning
remote sensing
Opis:
Soil salinity is one of the major impact factors on agriculture in the South of Kazakhstan. Prediction and estimation of soil salinity before planting a season usually helps to plan for the leaching of the salt. In the paper, satellite data such as radar data and machine learning algorithms, were used to classify soil salinity. Numerical results were presented for the Turkestan region, which contains more than 102 points. The machine learning algorithms, including Gaussian Process, Decision Tree, and Random Forest, were compared. The evaluation of the model score was realized by using metrics, such as accuracy, Recall, and f1. In addition, the influence of the dataset features on the classification was investigated using machine learning algorithms. The research results showed that the Gaussian Process model has the best score among considered algorithms. In addition, the results are consistent with the outcome of the Shapley Additive exPlanations (SHAP) framework.
Źródło:
Journal of Ecological Engineering; 2022, 23, 10; 61--67
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Сross platform tools for modeling and recognition of the fingerspelling alphabet of gesture language
Сross-platformowe narzędzia do modelowania i rozpoznawania alfabetu palcowego języka gestów
Autorzy:
Kondratiuk, Serhii S.
Krak, Iurii V.
Wójcik, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/408302.pdf
Data publikacji:
2019
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
cross-platform
sign language
fingerspelling alphabet
3D modeling
Convolutional Neural Networks
język migowy
alfabet palcowy
modelowanie 3D
konwolucyjna sieć neuronowa
Opis:
A solution for the problems of the finger spelling alphabet of gesture language modelling and recognition based on cross-platform technologies is proposed. Modelling and recognition performance can be flexible and adjusted, based on the hardware it operates or based on the availability of an internet connection. The proposed approach tunes the complexity of the 3D hand model based on the CPU type, amount of available memory and internet connection speed. Sign recognition is also performed using cross-platform technologies and the tradeoff in model size and performance can be adjusted. the methods of convolutional neural networks are used as tools for gestures of alphabet recognition. For the gesture recognition experiment, a dataset of 50,000 images was collected, with 50 different hands recorded, with almost 1,000 images per each person. The experimental researches demonstrated the effectiveness of proposed approaches.
Zaproponowano rozwiązanie problemów z alfabetem daktylograficznym w modelowaniu języka gestów i rozpoznawaniu znaków w oparciu o technologie wieloplatformowe. Wydajność modelowania i rozpoznawania może być elastyczna i dostosowana, w zależności od wykorzystywanego sprzętu lub dostępności łącza internetowego. Proponowane podejście dostosowuje złożoność modelu 3D dłoni w zależności od typu procesora, ilości dostępnej pamięci i szybkości połączenia internetowego. Rozpoznawanie znaków odbywa się również z wykorzystaniem technologii międzyplatformowych, a kompromis w zakresie wielkości modelu i wydajności może być dostosowany. Jako narzędzia do rozpoznawania gestów alfabetu wykorzystywane są metody konwolucyjnych sieci neuronowych. Na potrzeby eksperymentu rozpoznawania gestów zebrano zbiór danych obejmujący 50 000 obrazów, przy czym zarejestrowano 50 różnych rąk, a na każdą osobę przypadało prawie 1000 obrazów. Badania eksperymentalne wykazały skuteczność proponowanego podejścia.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2019, 9, 2; 24-27
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cycles in Bayesian Networks
Autorzy:
Shayakhmetova, Assem
Litvinenko, Natalya
Mamyrbayev, Orken
Wójcik, Waldemar
Zhamangarin, Dusmat
Powiązania:
https://bibliotekanauki.pl/articles/1844619.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Bayesian networks
directed graphs
directed cycles
propagation
Bayesian evidence
Opis:
The article is devoted to some critical problems of using Bayesian networks for solving practical problems, in which graph models contain directed cycles. The strict requirement of the acyclicity of the directed graph representing the Bayesian network does not allow to efficiently solve most of the problems that contain directed cycles. The modern theory of Bayesian networks prohibits the use of directed cycles. The requirement of acyclicity of the graph can significantly simplify the general theory of Bayesian networks, significantly simplify the development of algorithms and their implementation in program code for calculations in Bayesian networks.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 181-186
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Data-mining Technique for Seismic Vulnerability Assessment
Autorzy:
Wojcik, Waldemar
Karmenova, Markhaba
Smailova, Saule
Tlebaldinova, Aizhan
Belbeubaev, Alisher
Powiązania:
https://bibliotekanauki.pl/articles/1844631.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
data analysis
seismic assessment
clustering
h-means
k-means
random forest
Opis:
Assessment of seismic vulnerability of urban infrastructure is an actual problem, since the damage caused by earthquakes is quite significant. Despite the complexity of such tasks, today’s machine learning methods allow the use of “fast” methods for assessing seismic vulnerability. The article proposes a methodology for assessing the characteristics of typical urban objects that affect their seismic resistance; using classification and clustering methods. For the analysis, we use kmeans and hkmeans clustering methods, where the Euclidean distance is used as a measure of proximity. The optimal number of clusters is determined using the Elbow method. A decision-making model on the seismic resistance of an urban object is presented, also the most important variables that have the greatest impact on the seismic resistance of an urban object are identified. The study shows that the results of clustering coincide with expert estimates, and the characteristic of typical urban objects can be determined as a result of data modeling using clustering algorithms.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 261-266
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated Linearization of a System of Nonlinear Ordinary Differential Equations
Autorzy:
Mazakova, Aigerim
Jomartova, Sholpan
Wójcik, Waldemar
Mazakov, Talgat
Ziyatbekova, Gulzat
Powiązania:
https://bibliotekanauki.pl/articles/27311950.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Ordinary differential equation
Computer algebra
stability
controllability
MatLab
Opis:
This paper investigates the possibility of automatically linearizing nonlinear models. Constructing a linearised model for a nonlinear system is quite labor-intensive and practically unrealistic when the dimension is greater than 3. Therefore, it is important to automate the process of linearisation of the original nonlinear model. Based on the application of computer algebra, a constructive algorithm for the linearisation of a system of non-linear ordinary differential equations was developed. A software was developed on MatLab. The effectiveness of the proposed algorithm has been demonstrated on applied problems: an unmanned aerial vehicle dynamics model and a twolink robot model. The obtained linearized models were then used to test the stability of the original models. In order to account for possible inaccuracies in the measurements of the technical parameters of the model, an interval linearized model is adopted. For such a model, the procedure for constructing the corresponding interval characteristic polynomial and the corresponding Hurwitz matrix is automated. On the basis of the analysis of the properties of the main minors of the Hurwitz matrix, the stability of the studied system was analyzed.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 4; 655--600
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive Automatic System of Controlling Acceleration Characteristics of Electromechanical Converters with an Observing Identification Tool
Autorzy:
Kalabayeva, Aidana
Wójcik, Waldemar
Kashaganova, Gulzhan
Togzhanova, Kulzhan
Sarybayeva, Zhaksygu
Powiązania:
https://bibliotekanauki.pl/articles/27311924.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
electromechanical converters
adaptive system
control systems
identification
Opis:
The operating modes of the automatic control system for electromechanical converters for synchronization of rotor speeds have been developed and investigated. The proposed automatic speed control system allows adjusting the slave engine to the master one in a wide range from 0 to 6000 rpm. To improve the synchronization accuracy an adaptive algorithm is proposed that allows to increase the synchronization accuracy by 3-4 times. The proposed model of an adaptive automatic control system with an observing identification tool makes it possible to minimize the error in the asynchrony of the rotation of the rotors of two electromechanical converters.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 615--620
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statement and Solution of Multicriteria Tasks of Database Modular Block-Schemes Development
Autorzy:
Wojcik, Waldemar
Kalizhanova, Aliya
Akhmetov, Sultan
Nabiyeva, Gulnaz
Kozbakova, Ainur
Powiązania:
https://bibliotekanauki.pl/articles/226861.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
models
methods
discrete programming
data processing system
multicriterial problem
Opis:
The paper considers developed and offered an effective algorithm for solving the block-symmetrical tasks of polynomial computational complexity of data processing modular block-schemes designing. Currently, there are a large number of technologies and tools that allow you to create information systems of any class and purpose. To solve the problems of designing effective information systems, various models and methods are used, in particular, mathematical discrete programming methods. At the same time, it is known that such tasks have exponential computational complexity and can not always be used to solve practical problems. In this regard, there is a need to develop models and methods of the new class, which provide the solution of applied problems of discrete programming, aimed at solving problems of large dimensions. The work has developed and proposed block-symmetric models and methods as a new class of discrete programming problems that allow us to set and solve applied problems from various spheres of human activity. The issues of using the developed models are considered. and methods for computer-aided design of information systems (IS).
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 1; 237-242
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solving the Problem of Discrete Process Control Synthesis Using Optimization on a Sliding Interval
Autorzy:
Julayeva, Zhazira
Wójcik, Waldemar
Kashaganova, Gulzhan
Togzhanova, Kulzhan
Mambetov, Saken
Powiązania:
https://bibliotekanauki.pl/articles/27311920.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
discrete process control
optimization
sliding interval
equation of a closed loop system
closed loop control system
Opis:
The paper brings forward an idea of multi-threaded computation synchronization based on the shared semaphored cache in the multi-core CPUs. It is dedicated to the implementation of multi-core PLC control, embedded solution or parallel computation of models described using hardware description languages. The shared semaphored cache is implemented as guarded memory cells within a dedicated section of the cache memory that is shared by multiple cores. This enables the cores to speed up the data exchange and seamlessly synchronize the computation. The idea has been verified by creating a multi-core system model using Verilog HDL. The simulation of task synchronization methods allows for proving the benefits of shared semaphored memory cells over standard synchronization methods. The proposed idea enhances the computation in the algorithms that consist of relatively short tasks that can be processed in parallel and requires fast synchronization mechanisms to avoid data race conditions.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 2; 383--389
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 44

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