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Wyświetlanie 1-15 z 1062
Tytuł:
Transmission of Disaster Warnings via Control Channels in Cellular Networks
Autorzy:
Aal-Nouman, Mohammed I.
Abdullah, Osamah
Salman, Omar Hussein
Al-Shaikhli, Noor Qusay A.
Powiązania:
https://bibliotekanauki.pl/articles/1839317.pdf
Data publikacji:
2020
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
control channel
disaster reduction
early warning message
mobile network
Opis:
According to United Nations reports, natural disasters caused, worldwide, approximately 100,000 deaths and affected 175 million people each year between 2004 and 2013. To reduce those numbers, countries around the globe have made specific arrangements enabling them to warn the population about imminent disasters, in order to evacuate the area in due time. But providing such warnings in areas where no Internet access is available poses a great challenge. In this paper, we proposed a method to transmit early warning messages via UMTS cellular networks, while relying on spare extensions of control channels (FACH). The results obtained are validate based on their comparison with theoretical considerations and are also benchmarked against the 3GPP standard. The results show that messages may be sent faster than with the use of the 3GPP standard.
Źródło:
Journal of Telecommunications and Information Technology; 2020, 4; 53-61
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating the factor of safety for the design of columns using properties of steel rebarsmanufactured in Pakistan
Autorzy:
Abbas Zaidi, Safdar
Arsalan Saeed, Muhannad
Haider, Farhan
Powiązania:
https://bibliotekanauki.pl/articles/230463.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
współczynnik redukcji wytrzymałości
analiza wytrzymałościowa
obciążenie momentem
interakcja
słup żelbetowy
strength reduction factor
strength analysis
moment load
interaction
reinforced concrete column
Opis:
This paper includes the behaviour of RC column, using the steel strength data employed by Rafi et al. (2014). Eccentric short columns are studied for this purpose, both tension and compression controlled sections, are analysed considering the current design practice of Pakistan. Three cross sections were analysed using different steel percentages against load-moment interaction and the strength analyses. Concrete strength is also varied in this analysis. The load moment interaction diagrams were observed in major and minor axes and strength analysis is made for compression controlled and tension controlled sections. In this analysis it is observed that a section designed as a tension controlled is giving brittle failure at certain limit which should be avoided. Considering this scenario, several random cross sections are analysed, strength reduction factors for eccentric and pure axial columns are computed. Conclusions are made on behalf of this analysis for different types of column design.
Źródło:
Archives of Civil Engineering; 2020, 66, 3; 191-208
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation on the vibration reduction of rotating shaft using different groove shapes of tilt bearing
Autorzy:
Abbood, Ahmed Imad
Abdulla, Fadhel Abbas
Powiązania:
https://bibliotekanauki.pl/articles/2203648.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
tilt bearings
bearing groove
rotor system
ANSYS transient
fluent
vibration reduction
finite elements
układ wirnikowy
ANSYS
redukcja drgań
badanie numeryczne
łożysko
Opis:
Vibration control is very important for high-speed rotors. Oil film damping is considered an effective vibration-damping method, especially for long shafts in gas turbines, ships, and other high-speed rotating equipment. The existing groove in the internal surface of the tilt bearing increases the amount of oil that flows through the bearing; this is more effective in suppressing the vibration of the rotor system carried by the plain bearing. In order to suppress the vibration of the rotor system, which is supported by sliding bearings, a different groove-shaped oil flow (GSOF) is studied and analysed in this paper. A different shape of grooves in bearings was set up and measured to study the vibration-damping effect of the flow oil shape with GSOF. ANSYS software presents significant benefits to engage Fluent for oil flow with Transient structural for vibration measurements. This paper uses these terms to perform the simulation numerically to explore the groove-shaped damper's damping effect under the rotor system. The study identified three enhancements of vibration and settling time. First, the circular groove showed a 35.71% reduction in amplitude and 10% increase in stilling time; the next one is the circular groove which reduced the amplitude by 42.85% and the settling time by 0%. The third modification was the inclined groove which reduced the amplitude by 42.85% and the settling time by 12%. The last one was the triple-inclined groove, which reduced the amplitude and settling time by 57.14% and 20%, respectively.
Źródło:
Diagnostyka; 2023, 24, 3; art. no. 2023304
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Briquetting of Rosetta ilmenite ore with different organic binder and its reduction in hydrogen in the temperature range of 800-1200 degrees of Celsius
Brykietowanie rudy ilmenitowej z Rosetta przy użyciu różnego organicznego lepiszcza redukowanego w atmosferze wodoru w zakresie temp. 800-1200 stopni Celsjusza
Autorzy:
Abd el-Gawad, H. H.
El-Hussiny, N. A.
Wassf, M. A.
Kalifa, M. G.
Iskander, B. A.
Shalabi, M. E. H.
Powiązania:
https://bibliotekanauki.pl/articles/349661.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
kinetyka redukcji
brykiety
redukcja w środowisku wodorowym
ilmenite
reduction kinetics
briquetting
reduction by hydrogen
Opis:
Fine grained ilmenite ore was briquetted with different amounts of molasses or pitch and pressed under different values of pressure was studied in this investigation. The results show that optimal amount of added molasses and pitch were 1.5%, the pressure was fixed to 294.3 MPa. Furthermore, the characteristics of raw materials was examined by different methods of analysis, such as x-ray and screen analysis. The produced briquettes were then reduced by different amounts of hydrogen by different temperatures and the reduction kinetics was determined.
Drobno uziarniona ruda ilmenitu, brykietowana z różnymi ilościami melasy lub smoły pod różnym ciśnieniem, była przedmiotem badań w tym artykule. Wyniki wykazały, że optymalną ilością dodawanego lepiszcza było 1,5%, przy ciśnieniu 294,3 MPa. Ponadto, badano różnymi metodami, tj. promienie X oraz analiza sitowa, charakterystyki materiałów. Produkowane brykiety były redukowane przy udziale różnych ilości wodoru przy zmiennych wartościach temperatury. Kinetyka redukcji została określona.
Źródło:
Górnictwo i Geoinżynieria; 2009, 33, 4; 25-40
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model reduction problem of linear discrete systems: Admissibles initial states
Autorzy:
Abdelhak, A.
Rachik, M.
Powiązania:
https://bibliotekanauki.pl/articles/229165.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
linear discrete systems
model order reduction
Opis:
Given a linear discrete system with initial state x0 and output function yi , we investigate a low dimensional linear system that produces, with a tolerance index ϵ, the same output function when the initial state belongs to a specified set, called ϵ-admissible set, that we characterize by a finite number of inequalities. We also give an algorithm which allows us to determine an ϵ-admissible set.
Źródło:
Archives of Control Sciences; 2019, 29, 1; 41-55
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study the Radiation Time Effect of Synthesis Silver Nanoparticles by Photo Reduction Method
Autorzy:
Abdullah, H. l.
Kadhim, K. J.
Hilal, I. H.
Powiązania:
https://bibliotekanauki.pl/articles/1192092.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
silver nanocolloids
AFM
photo reduction
Opis:
Highly stable dispersion of nanosized silver nanoparticles were prepared by the reduction of silver salt (silver nitrite - AgNO3 ) by photo reduction methods UV-lamps. The irradiation time from 6 min. to one hour effects on the morphology of dispersed silver nanoparticles were studied. The formation of silver nanoparticles characterized by means of ultraviolet-visible spectroscopy, X-ray diffraction spectroscopy and transmission electron microscopy (AFM). During the preparation of observed that the color of dispersion gradually changed from white, yellow, orange, brown finally dark brown by changing with irradiation time, it is also the acidic solutions (PH) have decreased by increasing the duration of irradiation in addition to get different nanoparticles size lies between (33.988-93.175) nm.
Źródło:
World Scientific News; 2016, 37; 220-231
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the damping efficiency of a new type of concrete wall block
Ocena redukcji (tłumienia) drgań w nowych typach betonowych pustaków ściennych
Autorzy:
Adamczyk, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/2175028.pdf
Data publikacji:
2021
Wydawca:
Politechnika Częstochowska
Tematy:
concrete wall block
vibration reduction
recycling
betonowy pustak ścienny
redukcja drgań
recykling
Opis:
The article presents a solution for a new type of concrete wall block, which transfers loads from the entire building and additionally dampens vibrations from the external medium directly inside the block. The shape of the new type of concrete block was described, as well as the method of its execution and basic application. An important element was the development of the location of the through holes in the block, the shape of which and the possibility of filling them allowed for the dispersion of the propagating mechanical wave directly in the block. A test was carried out to determine the reduction of vibrations on the test stand, and the average values of damping between the walls for wall blocks without filling (N) and with filling (NW) were calculated. To compare the results, the test was performed for PBF-24 hollow bricks available on the market. It was found that the shape of the new type of hollow block improves vibration damping more than 4 times, and filling the block with a recycled composite mixture increases the damping to 7.5 times more compared to the PBF-24 block. Another advantage was the management of recycling materials, which directly translates into environmental protection.
Betonowe pustaki są powszechnie stosowanym materiałem w budownictwie, które cechują się stosunkowo dobrymi gabarytami, co bezpośrednio przekłada się na szybkość budowania m.in. ścian fundamentowych. W artykule przedstawiono opracowanie rozwiązania nowego typu betonowego pustaka ściennego, który poza swoją podstawową funkcją przenoszenia obciążeń z całego budynku, dodatkowo tłumi drgania pochodzące z ośrodka zewnętrznego bezpośrednio wewnątrz pustaka. Opisano kształt nowego typu pustaka betonowego, sposób jego wykonania i podstawowe zastosowanie. Istotnym elementem było opracowanie umiejscowienia otworów przelotowych w pustaku, których kształt i możliwość ich wypełnienia pozwoliły na rozproszenie propagującej fali mechanicznej bezpośrednio w pustaku. Przeprowadzono badanie w celu określenia redukcji drgań na wykonanym stanowisku badawczym oraz obliczono średnie wartości tłumienia między ściankami w centralnym ich punkcie dla nowego typu betonowych pustaków ściennych bez wypełnienia (N) oraz z wypełnieniem recyklingową mieszanką kompozytową (NW). Dla porównania wyników badanie wykonano dla dostępnych na rynku pustaków PBF-24. Stwierdzono, że sam kształt nowego typu pustaka poprawia tłumienie drgań ponad 4-krotnie. Natomiast wypełnienie pustaka recyklingową mieszanką kompozytową zwiększa tłumienie do 7,5 razy więcej w odniesieniu do pustaka PBF-24. Dodatkowym atutem było zagospodarowanie materiałów recyklingowych, co bezpośrednio przedkłada się na ochronę środowiska.
Źródło:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2021, 27 (177); 7-12
0860-7214
Pojawia się w:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Yield reduction and mycotoxin accumulation in barley doubled haploids inoculated with Fusarium culmorum [W.G.Sm.] Sacc.
Autorzy:
Adamski, T
Chelkowski, J.
Golinski, P.
Kaczmarek, Z.
Kostecki, M.
Perkowski, J.
Surma, M.
Wisniewska, H.
Powiązania:
https://bibliotekanauki.pl/articles/2043900.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nivalenol
mycotoxin accumulation
deoxynivalenol
doubled haploid
Fusarium culmorum
barley
head blight
yield reduction
Źródło:
Journal of Applied Genetics; 1999, 40, 2; 73-84
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interleaving Technique Implementation to Reduce PAPR of OFDM Signal in Presence of Nonlinear Amplification with Memory Effects
Autorzy:
Aimer, Y.
Bouazza, B. S.
Bachir, S.
Duvanaud, C.
Powiązania:
https://bibliotekanauki.pl/articles/309197.pdf
Data publikacji:
2018
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
downward compatibility
interleaving technique
interleaver key
OFDM systems
PAPR reduction
Opis:
In OFDM systems, peak-to-average power ratio (PAPR) reduction of the signal is one of the main challenges that need to be overcome in order to use the transmitter in an efficient manner. As one of attractive techniques, interleaving can be used in PAPR reduction for multicarrier signals without spectrum distortion. In this paper, the authors propose to extend the possibilities of interleaving to improve PAPR reduction, to use a new coding of interleaver keys at the transmitter and a robust decoding procedure at the receiver. In order not to degrade the data rate, the use of null subcarriers to transmit side information to the receiver is proposed and evaluated. Simulation results in the context of the WLAN 802.11a standard in the presence of a nonlinear power amplifier model with memory, show a reduction of PAPR of approximately 5.2 dB, and an improvement of bit error rate and error vector magnitude of about 2 decades and 4% respectively, while respecting the spectral mask specification.
Źródło:
Journal of Telecommunications and Information Technology; 2018, 3; 14-22
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic algorithm-PID controller for model order reduction pantographcatenary system
Autorzy:
Al-Awad, Nasir A.
Abboud, Izz K.
Al-Rawi, Muaayed F.
Powiązania:
https://bibliotekanauki.pl/articles/1837796.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
pantograph system
model reduction
PSO
G.A-PID
IMC
LQR
system pantografowy
redukcja modelu
Opis:
Controlling the contact force between the pantograph and the catenary has come to be a requirement for improving the performances and affectivity of high-speed train systems Indeed, these performances can also significantly be decreased due to the fact of the catenary equal stiffness variation. In addition, the contact force can also additionally differ and ought to end up null, which may additionally purpose the loss of contact. Then, in this paper, we current an active manipulate of the minimize order model of pantograph-catenary system. The proposed manipulate approach implements an optimization technique, like particle swarm (PSO), the usage of a frequent approximation of the catenary equal stiffness. All the synthesis steps of the manipulate law are given and a formal evaluation of the closed loop stability indicates an asymptotic monitoring of a nominal steady contact force. Then, the usage of Genetic Algorithm with Proportional-Integral-derivative (G.A-PID) as proposed controller appeared optimum response where, the contacts force consequences to be virtually equal to its steady reference. Finally it seems the advantageous of suggestion approach in contrast with classical manipulate strategies like, Internal mode control(IMC) method, linear quadratic regulator (LQR). The outcomes via the use of MATLAB simulation, suggests (G.A-PID) offers better transient specifications in contrast with classical manipulate.
Źródło:
Applied Computer Science; 2021, 17, 2; 28-39
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the strength reduction factor in predicting the flexural strength
Autorzy:
Alacali, S.
Arslan, G.
Powiązania:
https://bibliotekanauki.pl/articles/280506.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
reinforced concrete
beam
flexure strength
reduction factor
target reliability
Opis:
In the design of flexural strength, the strength reduction factor φ decreases from tension- -controlled sections to compression-controlled sections to increase safety with decreasing ductility. This paper presents how to determine the reduction factor for flexural strength of reinforced concrete beams according to ACI code. In the reliability-based design, the reliable prediction of the flexural strength of reinforced concrete members is assured by the use of reduction factors corresponding to different target reliability index β. In this study, for different β and coefficients of variation of the flexural strength parameters, the flexural strength reduction factor has been investigated by using experimental studies available in the literature. In the reliability analysis part of the study, the first-order second moment approach (FOSM) has been used to determine the reduction factor. It has also been assumed that the random variables are statistically independent.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 4; 1043-1053
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy controller of model reduction distillation column with minimal rules
Autorzy:
Alawad, Nasir
Alseady, Afaf
Powiązania:
https://bibliotekanauki.pl/articles/118163.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
distillation column
model reduction
pi controller
fuzzy inference system
MATLAB tool
kolumna destylacyjna
redukcja modelu
kontroler pi
system wnioskowania rozmytego
narzędzie MATLAB
Opis:
In this paper the control of a binary distillation column is described. This control is done with fuzzy logic, one with PI- like fuzzy controller and the other with modified PI fuzzy controller, using the minimal rules for fuzzy processing. This work is focused on model reduction of Wood and Berry binary distillation column to get the best performance. It is desired to minimize the rules in order to reduce the computation time to make a faster decision. Comparisons will be made between two versions of fuzzy controllers utilizing reduced rules to verify the outputs. The controlled variables are top composition with high concentration and bottom composition with low. To demonstrate the performance of the fuzzy PI control schemes, results are compared with a classical PI controller and optimal methods, like Differential Evolution (DE), Invasive Weed Optimization (IWO). The proposed structure is able to quickly track the parameter variation and perform better in load disturbances and also for set point changes. Then all the processes of the distillation column with itۥ s fuzzy controllers are simulated in MATLAB software as the results are shown.
Źródło:
Applied Computer Science; 2020, 16, 2; 80-94
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel approach for big data classification based on hybrid parallel dimensionality reduction using spark cluster
Autorzy:
Ali, Ahmed Hussein
Abdullah, Mahmood Zaki
Powiązania:
https://bibliotekanauki.pl/articles/305766.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
big data
dimensionality reduction
parallel processing
Spark
PCA
LDA
Opis:
The big data concept has elicited studies on how to accurately and efficiently extract valuable information from such huge dataset. The major problem during big data mining is data dimensionality due to a large number of dimensions in such datasets. This major consequence of high data dimensionality is that it affects the accuracy of machine learning (ML) classifiers; it also results in time wastage due to the presence of several redundant features in the dataset. This problem can be possibly solved using a fast feature reduction method. Hence, this study presents a fast HP-PL which is a new hybrid parallel feature reduction framework that utilizes spark to facilitate feature reduction on shared/distributed-memory clusters. The evaluation of the proposed HP-PL on KDD99 dataset showed the algorithm to be significantly faster than the conventional feature reduction techniques. The proposed technique required >1 minute to select 4 dataset features from over 79 features and 3,000,000 samples on a 3-node cluster (total of 21 cores). For the comparative algorithm, more than 2 hours was required to achieve the same feat. In the proposed system, Hadoop’s distributed file system (HDFS) was used to achieve distributed storage while Apache Spark was used as the computing engine. The model development was based on a parallel model with full consideration of the high performance and throughput of distributed computing. Conclusively, the proposed HP-PL method can achieve good accuracy with less memory and time compared to the conventional methods of feature reduction. This tool can be publicly accessed at https://github.com/ahmed/Fast-HP-PL.
Źródło:
Computer Science; 2019, 20 (4); 411-429
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon Co-Deposition During Gas Reduction of Water-Atomized Fe-Cr-Mo Powder
Autorzy:
Ali, B.
Choi, S. H.
Seo, S. J.
Maeng, D. Y.
Lee, C. G.
Kim, T. S.
Park, K. T.
Powiązania:
https://bibliotekanauki.pl/articles/352709.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
water atomization
Fe-based powder
oxide reduction
powder metallurgy
sinter-hardening alloys
Opis:
The water atomization of iron powder with a composition of Fe-3Cr-0.5Mo (wt.%) at 1600°C and 150 bar creates an oxide layer, which in this study was reduced using a mixture of methane (CH4) and argon (Ar) gas. The lowest oxygen content was achieved with a 100 cc/min flow rate of CH4, but this also resulted in a co-deposition of carbon due to the cracking of CH4. This carbon can be used directly to create high-quality, sinter hardenable steel, thereby eliminating the need for an additional mixing step prior to sintering. An exponential relationship was found to exist between the CH4 gas flow rate and carbon content of the powder, meaning that its composition can be easily controlled to suit a variety of different applications.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1119-1124
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Railway noise reduction by the application of CHFC material on the rail
Reduktion des Eisebahnlärms durch die Anwendung von CHFC Material
Autorzy:
Altenbaher, B.
Goltnik, D.
Rosi, B.
Powiązania:
https://bibliotekanauki.pl/articles/375437.pdf
Data publikacji:
2015
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
noise reduction
rail
anti noise system
measurements
railway noise
CHFC material
redukcja szumów
szyna
tłumienie hałasu
pomiary
hałas kolejowy
materiał CHFC
Opis:
Traffic is the most widespread source of environmental noise. Railway noise has become increasingly common in urban areas in the past few decades. Therefore environmental requirements for railway operations regarding noise are becoming very strict and will become even tighter in future. In the present paper we present actual track-based field test performed on Slovenian Railways. The significant noise reduction (up to 30dBA) was achieved by the application of CHFC material on the rail using CL-E1 top anti noise system.
Der Verkehr ist die am weitesten verbreitete Quelle von Umgebungslärm. Eisenbahnlärm nahm in den letzten Jahrzehnten in städtischen Gebieten immer mehr zu. Aus diesem Grund wurden die Umweltanforderungen für den Bahnverkehr bezüglich des Lärms immer strenger und werden in der Zukunft noch höher. In der vorliegenden Arbeit stellen wir den tatsächlichen Track-basierten Feldversuch auf der Slowenischen Bahn dar. Die deutliche Lärmreduzierung (bis 30 dBA)wurde durch die Anwendung von CHFC-Material auf der Schiene mithilfe des Cl-E1 Antirauschsystems erreicht.
Źródło:
Transport Problems; 2015, 10, 2; 5-14
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
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