Temat: data transmission - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Adaptive telecommunications modems techniques for use in underwater communication systems
Autorzy:: Budzińska, I.
Lasota, H.
Mazurek, R.
Powiązania:: https://bibliotekanauki.pl/articles/331551.pdf
Data publikacji:: 2003
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: hydroacoustics
underwater communication systems
data transmission
Opis:: Underwater channel data transmission is one of telecommunications most difficult problems. One way to optimise the transmission may be by adapting transmission techniques used in telecommunications modems. The articles presents two ITU-T standards: V.34 and G.992.1, known as ADSL. The possibilities and limitations of these techniques for underwater communication systems are discussed. The ADSI standard using the DMT modulation seems to be the best.
Źródło:: Hydroacoustics; 2003, 6; 285-292
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: New method of data transmission delay estimation for feeder differential protection
Nowa metoda kompensacji efektu opóźnienia transmisji danych dla potrzeb prądowo-różnicowych zabezpieczeń linii przesyłowych
Autorzy:: Łukowicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/410549.pdf
Data publikacji:: 2011
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: digital data transmission
line differential protection
Opis:: This paper is concerned with the problem of accurate aligning of digital data for purpose of feeder differential current protection. The method proposed makes use of knowledge of line susceptance for estimating the communication channel propagation time. The performance of the method is investigated under variable operational conditions of the 400 kV overhead transmission line. The outcomes show high efficiency of the approach allowing for essential improvement of sensitivity of a percentage differential protection.
W artykule zaprezentowano nowa metodę synchronizacji danych przesyłanych kanałem teleinforma-tycznym dla potrzeb przekaźników różnicowoprądowych napowietrznych linii elektroenergetycznych. Szacowanie opóźnienia przesyłu danych dokonywane jest na podstawie znajomości susceptancji linii oraz lokalnego pomiaru napięcia, lokalnego prądu fazowego i przesłanego prądu z przeciwległego końca linii w warunkach przedzwarciowych. Dokładność metody została sprawdzona dla różnych stanów pracy dwutorowej napowietrznej linii 400 kV. Wyniki badań potwierdzają dużą dokładność szacowania i tym samym korekcji kątowej między prądami z obu końców linii. Opracowana metoda kompensacji pozwala na zasadniczą poprawę czułości zabezpieczenia różnicowego linii przesyłowych.
Źródło:: Present Problems of Power System Control; 2011, 1; 97-107
2084-2201
Pojawia się w:: Present Problems of Power System Control
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The methods of secure data transmission in the KNX system
Autorzy:: Porzeziński, M.
Powiązania:: https://bibliotekanauki.pl/articles/2069489.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: security
KNX system
secure data transmission
Opis:: The article presents the demands concerning data security in distributed building automation systems and shows the need for providing additional mechanisms of secure communication in the KNX system. Three different methods developed for KNX data protection are discussed: EIBsec, KNX Data Security and the author’s method. Their properties are compared and potential areas of application are presented.
Źródło:: Journal of Polish Safety and Reliability Association; 2014, 5, 1; 131--141
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Fiber optics transmission for vehicle applications
Autorzy:: Perlicki, K.
Wilczewski, G.
Powiązania:: https://bibliotekanauki.pl/articles/114254.pdf
Data publikacji:: 2015
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: optical data transmission
fiber optics
automotive vehicle
Opis:: In this article, the optical fiber transmission system for vehicle application – MOST is presented. The advantages and disadvantages of utilizing the fiber optics transmission within motor vehicles are described. Methods for capacity improvement in a vehicle optical data transmission system are depicted.
Źródło:: Measurement Automation Monitoring; 2015, 61, 3; 81-83
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Real-time connection between immerse 3D visualization laboratory and KASKADA platform
Autorzy:: Wiszniewski, Ł.
Ziółkowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/1941641.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska
Tematy:: multimedia
cluster computing
visualization laboratory
data transmission
Opis:: Multimedia stream processing into two cooperative different systems (cluster platform and virtual lab) is considered. The considered selected information about the system is presented and the idea of its communication when executing the distributed application is proposed. A general schema of the communication architecture is given. Tests of data transmission quality are considered and their results are presented.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 4; 471-480
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: On the spectral efficiency of incoherent optical MIMO systems
Autorzy:: Siuzdak, J
Kowalczyk, M.
Powiązania:: https://bibliotekanauki.pl/articles/174480.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: data transmission
optical fiber
MIMO
spectral efficiency
Opis:: Spectral efficiency of incoherent optical MIMO systems is investigated. It is proved that under the best conditions (no channel crosstalk at the receiver) incoherent optical MIMO transmission gives potentially a better spectral efficiency than single channel transmission above a certain value of SNR in a single channel system, which varies from 9 dB for 2×2 MIMO to 12.3 dB for 4×4 MIMO. However, in practical optical 2×2 MIMO transmission, this border value of SNR is much higher and is around 25–30 dB.
Źródło:: Optica Applicata; 2013, 43, 3; 497-503
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: FANET Drone’s 4K Data Applications, Mobility Models and Wi-Fi IEEE802.11n Standards
Autorzy:: QasMarrogy, Ghassan A.
Powiązania:: https://bibliotekanauki.pl/articles/1839466.pdf
Data publikacji:: 2021
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: 4K data transmission
FANET
mobility models
UAV
Opis:: With growing popularity of unmanned aerial vehicles (UAVs), the importance of flying ad-hoc networks (FANETs) is enhanced by such applications as 4K video recording, communications in search and rescue missions and goods deliveries, to name just a few. This, in turn, stimulates research on different topologies of networks existing between UAVs, with studies in this field being essential to improving performance of such networks. Several problems must be solved to effectively use UAVs in order to offer stable and reliable massive data transmission capabilities, taking into consideration quickly changing FANET topologies, types of routing, security issues, etc. In this paper, a comprehensive evaluation of FANETs used by UAVs is presented in terms of communication network challenges, data types, mobility models and standards applied in order to achieve best performance. The evaluation presented herein covers such areas as data throughput, retransmission attempts and delay.
Źródło:: Journal of Telecommunications and Information Technology; 2021, 1; 51-55
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: FANET Drone’s 4K Data Applications, Mobility Models and Wi-Fi IEEE802.11n Standards
Autorzy:: QasMarrogy, Ghassan A.
Powiązania:: https://bibliotekanauki.pl/articles/1839485.pdf
Data publikacji:: 2021
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: 4K data transmission
FANET
mobility models
UAV
Opis:: With growing popularity of unmanned aerial vehicles (UAVs), the importance of flying ad-hoc networks (FANETs) is enhanced by such applications as 4K video recording, communications in search and rescue missions and goods deliveries, to name just a few. This, in turn, stimulates research on different topologies of networks existing between UAVs, with studies in this field being essential to improving performance of such networks. Several problems must be solved to effectively use UAVs in order to offer stable and reliable massive data transmission capabilities, taking into consideration quickly changing FANET topologies, types of routing, security issues, etc. In this paper, a comprehensive evaluation of FANETs used by UAVs is presented in terms of communication network challenges, data types, mobility models and standards applied in order to achieve best performance. The evaluation presented herein covers such areas as data throughput, retransmission attempts and delay.
Źródło:: Journal of Telecommunications and Information Technology; 2021, 1; 51-55
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Effect of uniform time on the transmission of signals in rail open systems
Autorzy:: Chrzan, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/2124712.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: rail systems
GPS
data transmission
systemy szynowe
transmisja danych
Opis:: Railroads and the Rail Traffic Control Systems installed on them in Poland have recently been undergoing rapid techno-logical development (Brodzik, 2019). Modern transportation solutions are susceptible to electromagnetic interference (Paś and Rosiński, 2017). Development of modern railroad infrastructure means not only stations and modern rolling stock, but also safe and reliable train traffic control systems based on the latest telecommunication and IT technologies (Ciszewski et al., 2017). In the last century these technologies were still considered dangerous and were introduced with great fear. Today, computerized systems for controlling railway traffic on the track are becoming the norm. Systems are created as "overlays" for existing relay systems or autonomous systems are built based on microprocessor systems (Burdzik et al., 2017). Today it is hard to imagine a modern control room without computer equipment. The introduction of microprocessor technology to railroad traffic control devices took place at the turn of the century. However, the use of modern radio systems in rail transport is the moment when technology based on the appeared in the world LTE (Long-Term evolution) standard. The development of modern data transmission technologies is integrally connected with the mobility of its users. In the presented article the author has tried to determine the impact of transmission synchronization on the basic trans-mission parameters of LTE signal (Chrzan, 2021). The convenience of using rail communications for its users is the possibility of uninterrupted access to data transmission services along the entire route of the train. Therefore, the research presented in this article was focused on the use of the public radio communication network for passenger data transmission and data transmission for railroad needs. The article presents the influence of synchronisation of data transmission in open railway systems using GPS (Global Positioning System) technology. It presents a description of the physical phenomena associated with synchronisation, and presents the author's method for carrying out measurements on railway line No. 4. For this purpose, a diagnostic station was built and special software for data transmission encryption was prepared. The process of synchronisation of clocks with the use of uniform time was adopted as the basis. General measurement results and conclusions resulting from the use of open transmission in railway radiocommunication systems synchronised by the GPS system signal are presented.
Źródło:: Archives of Transport; 2022, 61, 1; 39--49
0866-9546
2300-8830
Pojawia się w:: Archives of Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Fixed-latency System for High-speed Serial Transmission Between FPGA Devices with Forward Error Correction
Autorzy:: Kruszewski, Michał
Zabołotny, Wojciech Marek
Powiązania:: https://bibliotekanauki.pl/articles/226360.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: data transmission
fixed-latency transmission
forward error correction
orthogonal concatenated coding
FPGA
Opis:: This paper presents the design of a compact protocol for fixed-latency, high-speed, reliable, serial transmission between simple field-programmable gate arrays (FPGA) devices. Implementation of the project aims to delineate word boundaries, provide randomness to the electromagnetic interference (EMI) generated by the electrical transitions, allow for clock recovery and maintain direct current (DC) balance. An orthogonal concatenated coding scheme is used for correcting transmission errors using modified Bose–Chaudhuri–Hocquenghem (BCH) code capable of correcting all single bit errors and most of the double-adjacent errors. As a result all burst errors of a length up to 31 bits, and some of the longer group errors, are corrected within 256 bits long packet. The efficiency of the proposed solution equals 46.48%, as 119 out of 256 bits are fully available to the user. The design has been implemented and tested on Xilinx Kintex UltraScale+ KCU116 Evaluation Kit with a data rate of 28.2 Gbps. Sample latency analysis has also been performed so that user could easily carry out calculations for different transmission speed. The main advancement of the work is the use of modified BCH(15, 11) code that leads to high error correction capabilities for burst errors and user friendly packet length.
Źródło:: International Journal of Electronics and Telecommunications; 2020, 66, 3; 545-553
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Weather routing system architecture using onboard data collection and route optimisation
Autorzy:: Szłapczyńska, Joanna
Vettor, Roberto
Szłapczyński, Rafał
Łącki, Mirosław
Życzkowski, Marcin
Hinostroza, Miguel A.
Santos, Fernando P.
Tycholiz, Wojciech
Soares, C. Guedes
Powiązania:: https://bibliotekanauki.pl/articles/32899953.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: system architecture
weather routing
onboard data monitoring
route optimisation
data transmission optimisation
Opis:: This paper describes the architecture of a weather routing system consisting of two key elements: onboard monitoring and route optimiser sub-systems. The former is responsible for collecting various onboard measurements, such as current ship position or ship motion variables. These data, when gathered and processed, are then used for fine-tuning a ship model. The model, together with weather forecasts, is utilised by a multi-objective route optimiser to estimate forecasted ship responses during the voyage. The route optimiser has been developed in a client-server architecture to reallocate all necessary high-tech resources to the server side and keep the client software as simple and light as possible. The system also includes a module responsible for optimising transmission costs, to reduce onboard transmission during the voyage. The entire solution has been deployed onboard the demonstrator ship ‘Monte da Guia’ and tested during its operations at sea.
Źródło:: Polish Maritime Research; 2022, 2; 87-95
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: A fast speech data files transmission by ASCII characters in-coding
Autorzy:: Pawełczyk, P.
Kostorz, I.
Powiązania:: https://bibliotekanauki.pl/articles/333067.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: szybka transmisja danych
data fast transmission
Opis:: This note shortly describes the system of a fast transmission of oral data files that are converted into ASCII characters. These files are using lower capacity the transmission capacity of the communication virtual data links.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 8; II21-24
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Robust Flow Controllers for a Single Virtual Circuit in Data Transmission Networks with Lossy Links
Autorzy:: Bartoszewicz, A.
Leśniewski, P.
Powiązania:: https://bibliotekanauki.pl/articles/108780.pdf
Data publikacji:: 2012
Wydawca:: Społeczna Akademia Nauk w Łodzi
Tematy:: data transmission networks
congestion control
sliding-mode control
discrete-time systems
Opis:: The paper concerns an application of regulation theory methods to modeling and effective control of connection-oriented data transmission networks. In particular the problem of congestion control in a single virtual circuit of such a network is considered and new discrete-time sliding mode data flow rate controllers are proposed. The controllers are designed in such a way that packet losses are explicitly accounted for. The closed-loop system stability and finitetime error convergence are proved. Moreover, a number of favorable properties of the proposed controllers are stated as theorems, formally proved and verified in a simulation example. It is demonstrated that the proposed controllers guarantee full utilization of the available bandwidth and eliminates the risk of bottleneck node buffer overflow. Application of time-varying sliding hyperplanes helps avoid excessive transmission rates at the beginning of the control process.
Źródło:: Journal of Applied Computer Science Methods; 2012, 4 No. 1; 5-20
1689-9636
Pojawia się w:: Journal of Applied Computer Science Methods
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: The BICS - Advanced Method of the Electronic Ship Reporting for the RIS Centre
Autorzy:: Lisaj, A.
Smacki, A.
Uriasz, J.
Powiązania:: https://bibliotekanauki.pl/articles/320745.pdf
Data publikacji:: 2017
Wydawca:: Polskie Forum Nawigacyjne
Tematy:: river information service
Electronic Ship Reporting
processing and navigational data transmission
Opis:: The article presents principles of transmission and processing of the data in electronic reporting of river ships used in inland navigation. The new standard of electronic reporting of ships was shown - system Barge Information and Communication System (BICS). Results and analysis of surveys of real duplex transmission of data in BICS system for purpose of RIS Centre were presented.
W artykule przedstawiono zasady transmisji i przetwarzania danych przez statki rzeczne w śródlądowych systemach nadzoru nawigacji. Omówiono nowy standard raportów znany pod nazwą Barge Information and Communication System (BICS). Zaprezentowano też wyniki analiz i badań efektywności łączności dupleksowej w warunkach rzeczywistych przedstawianego standardu BICS w aspekcie systemu nadzoru ruchu na rzece.
Źródło:: Annual of Navigation; 2017, 24; 231-243
1640-8632
Pojawia się w:: Annual of Navigation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: The System for estimation parameters of internal combustion engine in the road test
Autorzy:: Mamala, J.
Brol, S.
Bieniek, A.
Powiązania:: https://bibliotekanauki.pl/articles/242285.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engines
road test
system of data transmission CAN BUS
Opis:: Current internal combustion engine technology for road vehicles allows us to meet the existing and planned future standards for emission. However, the motion of a moving vehicle used in real operating conditions is frequent changes of the values of power in the powertrain. The analysis of the results of the road test through a measurement of parameters of engine in a passenger car proves, that the changes of parameters engine are frequent. The paper presents method measurement parameters form system of data transmission CAN BUS and estimation is performed using measurement accelerometer car's chassis of parameters internal combustion engine determined on road test. Estimation of main parameters of internal combustion engine is made with use of measured quantities such as: car mass and acceleration collected in function of vehicle linear velocity. The most essential problems in this approach, considered as primary method errors, are minimization of underestimation of moment of inertia of rotating elements in drivetrain and efficiency of drivetrain itself. Moreover it is vital to determine as precise as possible vehicle acceleration and its linear velocity in presence of disturbances - mainly chassis movements and additional accelerations, which comes from pavement unevenness (roughness). In this article application of several sensors of different quantities for increase of accuracy of PAAF 2 (Power Acceleration And Force) device in relation to prototype device predecessor is taken into consideration.
Źródło:: Journal of KONES; 2011, 18, 2; 279-286
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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