Temat: ZF - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: ZF EcoLife skrzynia biegów dla nowoczesnego autobusu miejskiego
Autorzy:: Pawlak, G.
Powiązania:: https://bibliotekanauki.pl/articles/311291.pdf
Data publikacji:: 2011
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: autobusy miejskie
skrzynia biegów ZF EcoLife
testowanie autobusów
buses
gearbox ZF EcoLife
Opis:: Przeprowadzono testy autobusów miejskich z nowymi skrzyniami biegów ZF EcoLife. Zaobserwowano, że autobusy te w porównaniu do starszych typów, spalają o 13,7% mniej paliwa (autobusy dziesięciometrowe) oraz o 17,2% mniej (autobusy dwunastometrowe). Głównymi układami nowej skrzyni biegów są: sprzęgło hydrokinetyczne, retarder, trzy przekładnie planetarne, bardzo wydajny układ chłodzenia oraz układ sterowania z oprogramowaniem TopoDyn Life.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2011, 12, 7-8; 30-33
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Nowe automatyczne skrzynie biegów ZF dla autobusów miejskich i lokalnych
Autorzy:: Rusak, Z.
Powiązania:: https://bibliotekanauki.pl/articles/315916.pdf
Data publikacji:: 2008
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: autobus
skrzynia biegów
skrzynia biegów ZF EcoLife
Opis:: ZF to jeden z największych producentów skrzyń biegów, przekładni kierowniczych, osi i elementów zawieszenia dla pojazdów użytkowych. Trudno dzisiaj znaleźć autobus, który nie byłby wyposażony w jakiś komponent wyprodukowany w jednej z fabryk koncernu. Najbardziej znanymi konstrukcjami są: automatyczna skrzynia biegów dla autobusów turystycznychy ZF As-Tronic oraz automatyczna skrzynia dla autobusów miejskich i lokalnych ZF Ecomat. Obecnie ZF wprowadza na rynek nowe produkty, które mają poszerzyć rynki zbytu.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2008, 9, 9; 20-22
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Using Least Mean p-Power Algorithm to Correct Channel Distortion in MC-CDMA Systems
Autorzy:: Zidane, M.
Safi, S.
Sabri, M.
Frikel, M.
Powiązania:: https://bibliotekanauki.pl/articles/308275.pdf
Data publikacji:: 2018
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: adaptive equalization
adaptive identification
BER
BRAN C
LMP
MC-CDMA system
ZF
Opis:: This work focuses on adaptive Broadband Radio Access Network (BRAN) channel identiﬁcation and on downlink Multi-Carrier Code Division Multiple Access (MCCDMA) equalization. We use the normalized BRAN C channel model for 4G mobile communications, distinguishing between indoor and outdoor scenarios. On the one hand, BRAN C channel parameters are identiﬁed using the Least Mean p-Power (LMP) algorithm. On the other, we consider these coeﬃcients in the context of adaptive equalization. We provide an overview and a mathematic formulation of MC-CDMA systems. According to these fundamental concepts, the equalizer technique is investigated analytically to compensate for channel distortion in terms of the bit error rate (BER). The numerical simulation results, for various signal-to-noise ratios and diﬀerent p threshold, show that the presented algorithm is able to simulate the BRAN C channel measured with different accuracy levels. Furthermore, as far as the adaptive equalization problem is concerned, the results obtained using the zero-forcing equalizer demonstrate that the algorithm is adequate for some particular cases of threshold p.
Źródło:: Journal of Telecommunications and Information Technology; 2018, 3; 23-30
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Improved Two-Dimensional Double Successive Projection Algorithm for Massive MIMO Detection
Autorzy:: Chakraborty, Sourav
Sinha, Nirmalendu Bika
Mitra, Monojit
Powiązania:: https://bibliotekanauki.pl/articles/2202981.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: massive MIMO
MMSE
ZF
2D-DSP
QAM
LLR
I2D-DSP
Opis:: In a massive multiple-input multiple-output (MIMO) system, a large number of receiving antennas at the base station can simultaneously serve multiple users. Linear detectors can achieve optimal performance but require large dimensional matrix inversion, which requires a large number of arithmetic operations. Several low complexity solutions are reported in the literature. In this work, we have presented an improved two-dimensional double successive projection (I2D-DSP) algorithm for massive MIMO detection. Simulation results show that the proposed detector performs better than the conventional 2D-DSP algorithm at a lower complexity. The performance under channel correlation also improves with the I2D-DSP scheme. We further developed a soft information generation algorithm to reduce the number of magnitude comparisons. The proposed soft symbol generation method uses real domain operation and can reduce almost 90% flops and magnitude comparisons.
Źródło:: International Journal of Electronics and Telecommunications; 2023, 69, 1; 139--146
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Improved CSE with DLS-MMSE Criteria in TH-UWB System
Autorzy:: Djebbari, Ali
Elahmar, Sid Ahmed
Powiązania:: https://bibliotekanauki.pl/articles/2058501.pdf
Data publikacji:: 2022
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: channel shortening equalizer
inter-symbol interferences
rake receiver
time hopping
ultra-wide band
ZF-MMSE
Opis:: This article presents a study on the use of deter ministic least squares criteria combined with the minimum mean square error method for the purpose of computing filter coefficients of the channel shortening equalizer. This method is well known to alleviate inter-symbol interference in time hopping UWB systems. The validity of this method is applied to shorten the impulse response of the effective UWB channels and, therefore, reduce the complexity of the rake receiver. Results show a very promising advantage compared to partial rake (P-Rake), selective-rake (S-Rake) and optimal maximum shortening signal-to-noise ratio methods.
Źródło:: Journal of Telecommunications and Information Technology; 2022, 1; 93--98
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigation of VBLAST Equalization Technique for Underwater Acoustic Communications
Autorzy:: Pranitha, B.
Anjaneyulu, L.
Minh, Hoa
Aslam, Nauman
Kumar, Sandeep V.
Powiązania:: https://bibliotekanauki.pl/articles/227284.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: underwater acoustic communication (UWAC)
multiple input multiple output (MIMO)
zero-forcing (ZF)
vertical-Bell laboratories layered space-time (VBLAST)
Opis:: Underwater Acoustic Communications (UWAC) is an emerging technology in the field of underwater communications, and it is challenging because of the signal attenuation of the sound waves. Multiple Input and Multiple- Output (MIMO) is introduced in UWAC because of its support in enhancing the data throughput even under the conditions of interference, signal fading, and multipath. The paper presents the concept and analysis of 2 × 2 MIMO UWAC systems that uses a 4 - QAM spatial modulation scheme thus minimizing the decoding complexity and overcoming the Inter Channel Interference (IChI). Bit Error Rate (BER) investigation is carried out over different link distances under acoustic Line of Sight (LOS). The utilization of Zero Forcing (ZF) and Vertical-Bell Laboratories Layered Space-Time (VBLAST) equalizers, which estimates the transmitted data proves a success of removing Inter Symbol Interference (ISI). The ISI caused due to multipath effect and scattering in UWAC can be reduced by iterative process considered in VBLAST. A study is made on how the distance between the transmitter and the receiver and the Doppler Effect has its impact on the performance of the system.
Źródło:: International Journal of Electronics and Telecommunications; 2020, 66, 2; 331-337
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: FPGA Implementation of Sphere Detector for Spatial Multiplexing MIMO System
Autorzy:: Mohamed, Asma
Zekry, Abdel Halim
Ibrahim, Reem
Powiązania:: https://bibliotekanauki.pl/articles/963839.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: multiple input multiple output (MIMO)
Spatial Multiplexing(SM)
zero-forcing (ZF)
Minimum Mean Square Estimator (MMSE)
Sorted QR Decomposition (SQRD)
Sphere Decoder (SD)
Opis:: Multiple Input Multiple Output (MIMO (techniques use multiple antennas at both transmitter and receiver for increasing the channel reliability and enhancing the spectral efficiency of wireless communication system.MIMO Spatial Multiplexing (SM) is a technology that can increase the channel capacity without additional spectral resources. The implementation of MIMO detection techniques become a difficult mission as the computational complexity increases with the number of transmitting antenna and constellation size. So designing detection techniques that can recover transmitted signals from Spatial Multiplexing (SM) MIMO with reduced complexity and high performance is challenging. In this survey, the general model of MIMO communication system is presented in addition to multiple MIMO Spatial Multiplexing (SM) detection techniques. These detection techniques are divided into different categories, such as linear detection, Non-linear detection and tree-search detection. Detailed discussions on the advantages and disadvantages of each detection algorithm are introduced. Hardware implementation of Sphere Decoder (SD) algorithm using VHDL/FPGA is also presented.
Źródło:: International Journal of Electronics and Telecommunications; 2019, 65, 2; 245-252
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Joining the High-Strength Steel Sheets Used in Car Body Production
Autorzy:: Kaščák, Ľuboš
Cmorej, Denis
Spišák, Emil
Slota, Ján
Powiązania:: https://bibliotekanauki.pl/articles/2024185.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: clinching
resistance spot welding
tensile test
metallography
HCT600X+ZF
HCT600X+Z
HX420LAD+Z
klinczowanie
zgrzewanie punktowe
próba rozciągania
metalografia
Opis:: Nowadays, there are several important reasons for using high-strength sheets in the manufacturing of car bodies. Car manufacturers choose the steel with good formability, fatigue resistance and ability to absorb impact energy. Microalloyed steels and dual-phase steels are the materials which fulfil the above-mentioned criteria. The application of high-strength sheets has led to the development of new materials joining techniques. Mechanical joining, such as clinching, is the innovative technique to join these progressive materials. Materials of different thicknesses can be joined by clinching. The paper focuses on the comparison of the properties of the joints made by clinching and resistance spot welding. The application of resistance spot welding is still the most used joining method in car body production. These properties were investigated by tensile test and metallographic observation. The HCT600X+ZF, HCT600X+Z and HX420LAD+Z steel sheets were used for the experiments. The results of tensile test show that the values of load-bearing capacity of clinched joints reached from 3900 N to 5900 N and the resistance spot welded joints reached the values of load-bearing capacity from 12000 N to 19500 N. In comparison to the resistance spot welded joints, the clinched joints reached from 32 to 48% of load-bearing capacity.
Źródło:: Advances in Science and Technology. Research Journal; 2021, 15, 1; 184-196
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki