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    Wyświetlanie 1-8 z 8
    Tytuł:
    Ɵ(1) Time Algorithm for Master Selection in Ad-hoc Wireless Networks
    Autorzy:
    Khattabi, Mohammed
    Elmesbahi, Jelloul
    Khaldoun, Mohammed
    Errami, Ahmed
    Bouattane, Omar
    Powiązania:
    https://bibliotekanauki.pl/articles/226674.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cluster-based networks
    cluster head selection
    ad-hoc networks
    wireless sensors networks
    SDR
    USRP
    simulink
    Opis:
    This paper details a hardware implementation of a distributed Ɵ(1) time algorithm allows to select dynamically the master device in ad-hoc or cluster-based networks in a constant time regardless the number of devices in the same cluster. The algorithm allows each device to automatically detect its own status; master or slave; based on identifier without adding extra overheads or exchanging packets that slow down the network. We propose a baseband design that implements algorithm functions and we detail the hardware implementation using Matlab/Simulink and Ettus B210 USRP. Tests held in laboratory prove that algorithm works as expected.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 3; 521-527
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensors networks for petroleum derivative pollution monitoring system
    Sieć czujnikowa do monitorowania skażeń produktami ropopochodnymi
    Autorzy:
    Kalicki, A.
    Michalski, A.
    Staroszczyk, Z.
    Dziadak, B.
    Makowski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/256737.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    system pomiarowy
    skażenie ropopochodne
    system monitorujący
    bezprzewodowy system pomiarowy
    sieć czujnikowa
    measurement system
    petroleum derivative pollution
    hydrocarbon pollution
    monitoring system
    wireless measurement system
    sensors networks
    Opis:
    This paper discusses the solution of the www petroleum derivative pollution monitoring system. The main aim of this paper is to present the authors' approach to the very current problem of the practical realisation of the www, server based, measuring system. The idea of the system is based on collecting data from mobile GSM/GPRS accessed observation points (MOP), and delivering information on potential pollution to the authorised www clients. Data transfer between MOP and the clients is controlled by the www server. Two types of dedicated MOPs are discussed, based on microcomputer PC 104+ and on microcontroller ADAM 4500. Two different approaches to server realisation are presented: Windows oriented based on Visual Studio. NET, and WAMP oriented, based on the open software.
    W artykule przedstawiono system monitorowania skażeń produktami ropopochodnymi, bazujący na sieci WWW. Głównym celem artykułu jest przedstawienie podejścia Autorów do bardzo aktualnego problemu praktycznej budowy systemów pomiarowych wykorzystujących strony WWW i szeroko rozumiany Internet. Idea systemu zakłada zbieranie danych poprzez sieć GSM/GPRS z mobilnych punktów pomiarowych (MPP) i przekazywanie ich za pośrednictwem stron WWW do potencjalnych autoryzowanych odbiorców. Transmisja danych pomiędzy MPP a odbiorcami jest kontrolowana za pomocą serwera WWW. Dwa typy MPP są analizowane, jeden oparty o mikrokomputer PC 104+, drugi bazujący na mikrokontrolerze ADAM 4500. Również są analizowane dwa podejścia do realizacji serwera, jeden bazujący na Visual Studio.NET, drugi wykorzystuje technologie WAMP.
    Źródło:
    Problemy Eksploatacji; 2006, 4; 137-152
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correction of gas sensor dynamic errors by means of neural networks
    Autorzy:
    Roj, J.
    Urzędniczok, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/114150.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    gas sensors
    artificial neural networks
    dynamic correction
    Opis:
    The paper presents a method based on artificial neural network (ANN) technique applied for correction of dynamic error of gas concentration measuring transducer. Its response time is about 8 minutes. The results obtained in the research of this transducer were used for learning and testing ANN, which were implemented in the dynamic correction task. The described method allowed for significant reduction of the transducer’s response time – the output signal was practically fixed after a time equal to one sampling period of output signal provided that the stimulus is a step function. In addition, the use of ANN allows reducing the impact of the transducer dynamic non-linearity on the correction effectiveness.
    Źródło:
    Measurement Automation Monitoring; 2015, 61, 12; 538-541
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An intelligent vehicle detection management model for parking spaces
    Autorzy:
    Kirci, P.
    Saglamoz, S.
    Sener, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/197257.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    sensors
    wireless networks
    parking spaces
    cost
    czujniki
    sieci bezprzewodowe
    miejsca parkingowe
    koszt
    Opis:
    Today, technology has transformed humans’ lives in all areas. Technology can be found in everyday life in the form of smart factories, smart cities and smart rooms. Thus, smart systems and devices are having a great effect upon human activities. Together with improving technology, in the last 50 years, the human population has seen an expeditious and substantial increase. The number of cars has also substantially increased and, as a result, parking spaces and car park have become more important. Areas in which to park cars have become wider in scope, including inside huge buildings; thus, the management of them become more difficult and complicated. Being able to discover an empty parking space as soon as it is needed is vital for both driver and multilevel parking garage owner, especially for the former, in order to avoid losing him/her time and money in a crowded city. Thus, we designed a smart car parking system, which is managed by Arduino control. Our main aim includes reducing time loss and the amount of fuel consumed while trying to find a parking space. By reducing the amount of consumed fuel, it will be possible to reduce air pollution levels, together with minimizing the negative impact on domestic finances caused by car usage.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2018, 98; 35-43
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graph-based fog computing network model
    Autorzy:
    Pysmennyi, Ihor
    Petrenko, Anatolii
    Kyslyi, Roman
    Powiązania:
    https://bibliotekanauki.pl/articles/1837778.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    software-defined networks
    fog computing
    smart sensors
    IoT
    sieci definiowalne programowo
    mgła obliczeniowa
    inteligentne czujniki
    Opis:
    IoT networks generate numerous amounts of data that is then transferred to the cloud for processing. Transferring data cleansing and parts of calculations towards these edge-level networks improves system’s, latency, energy consumption, network bandwidth and computational resources utilization, fault tolerance and thus operational costs. On the other hand, these fog nodes are resource-constrained, have extremely distributed and heterogeneous nature, lack horizontal scalability, and, thus, the vanilla SOA approach is not applicable to them. Utilization of Software Defined Network (SDN) with task distribution capabilities advocated in this paper addresses these issues. Suggested framework may utilize various routing and data distribution algorithms allowing to build flexible system most relevant for particular use-case. Advocated architecture was evaluated in agent-based simulation environment and proved its’ feasibility and performance gains compared to conventional event-stream approach.
    Źródło:
    Applied Computer Science; 2020, 16, 4; 5-20
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancement of Drilling Safety and Quality Using Online Sensors and Artificial Neural Networks
    Autorzy:
    Liu, T.- I.
    Kumagai, A.
    Lee, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/90529.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    drilling safety
    online sensors
    artificial neural networks
    bezpieczeństwo pracy
    ocena ryzyka zawodowego
    wiertnictwo
    sieci neuronowe
    Opis:
    Cutting force sensors and neural networks have been used for the occupational safety of the drilling process. The drill conditions have been online classified into 3 categories: safe, caution, and danger. This approach can change the drill just before its failure. The inputs to neural networks include drill size, feed rate, spindle speed, and features that were extracted from drilling force measure-ments. The outputs indicate the safety states. This detection system can reach a success rate of over 95%. Furthermore, the one misclassification during online tests was a one-step ahead pre-alarm that is acceptable from the safety and quality viewpoint. The developed online detection system is very robust and can be used in very complex manufacturing environments.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 1; 37-56
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic flux leakage method of railway rails defects diagnostics and its place among mobile means of non-destructive testing
    Autorzy:
    Nichoha, V.
    Shkliarskyi, V.
    Storozh, V.
    Matiieshyn, Y.
    Vashchyshyn, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/215724.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Kolejnictwa
    Tematy:
    information diagnostic system
    railway tracks defectoscopy
    component sensors
    non-destructive magnetic methods
    wavelet analysis and neural networks
    Opis:
    The task of mobile railway tracks defects diagnostics is to identify and recognize dangerous defects in order to prevent possible accidents. A review of the methods for controlling the physical and mechanical characteristics of metal constructions of engineering objects of long-term exploitation, which are used under different temperature regimes and conditions, is carried out in Among the described non-destructive methods on the used physical fields are allocated: magnetic, acoustic, electromagnetic, thermal and electrical. Electromagnetic methods are successfully used in various industries, such as the railway industry, the metal-working industry, the drilling, nuclear waste storage and so on. In particular, in the railway industry, using the technique of measuring the electromagnetic field of an alternating current, checks of carriages, wheel pairs and tracks are carried out. Recently, hybrid systems of diagnostics on the basis of carriages-defectoscopes are actively used to detect defects in railway tracks while simultaneously using magnetic, ultrasonic, visual-measuring and optical methods of non-destructive control. The high efficiency of new methods for constructing the information diagnostic system (IDS) of mobile magnetic railway tracks defectoscopy objectively depends on the successful solution of the certain contradiction: this is the provision of high resolution and sensitivity of IDS for the detection, differentiation and classification of the defects signals – on the one hand, and on the other hand – reduction of the time allocated for the defectoscopic examination in the conditions of various obstacles and the need for defects detection in the early stages of their development. Solving this contradiction with the use of modern methods of railway tracks defects signals processing and new small size multichannel and component sensors forms the content of an important application problem, which is considered in this article.
    Źródło:
    Problemy Kolejnictwa; 2018, 180; 105-119
    0552-2145
    2544-9451
    Pojawia się w:
    Problemy Kolejnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical and practical aspects of military wireless sensor networks
    Autorzy:
    Winkler, M.
    Tuchs, K. D.
    Hughes, K.
    Barclay, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/308220.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    wireless sensor networks
    military sensor applications
    joint intelligence surveillance reconnaissance (JISR)
    military sensors
    energy efficient routing
    WSN generations
    Opis:
    Wireless sensor networks can be used by the military for a number of purposes such as monitoring militant activity in remote areas and force protection. Being equipped with appropriate sensors these networks can enable detection of enemy movement, identification of enemy force and analysis of their movement and progress. The focus of this article is on the military requirements for flexible wireless sensor networks. Based on the main networking characteristics and military use-cases, insight into specific military requirements is given in order to facilitate the reader's understanding of the operation of these networks in the near to medium term (within the next three to eight years). The article structures the evolution of military sensor networking devices by identifying three generations of sensors along with their capabilities. Existing developer solutions are presented and an overview of some existing tailored products for the military environment is given. The article concludes with an analysis of outstanding engineering and scientific challenges in order to achieve fully flexible, security proved, ad hoc, self-organizing and scalable military sensor networks.
    Źródło:
    Journal of Telecommunications and Information Technology; 2008, 2; 37-45
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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