http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
3GPP LTE-Assisted Wi-Fi-Direct: Trial Implementation of Live D2D Technology
Alexander Pyattaev,Jiri Hosek,Kerstin Johnsson,Radko Krkos,Mikhail Gerasimenko,Aleksandr Ometov,Pavel Masek,Sergey Andreev,Jakub Sedy,Vit Novotny,Yevgeni Koucheryavy 한국전자통신연구원 2015 ETRI Journal Vol.37 No.5
This paper is a first-hand summary on our comprehensive live trial of cellular-assisted device-to-device (D2D) communications currently being ratified by the standards community for next-generation mobile broadband networks. In our test implementation, we employ a full-featured 3GPP LTE network deployment and augment it with all necessary support to provide real-time D2D connectivity over emerging Wi-Fi-Direct (WFD) technology. As a result, our LTE-assisted WFD D2D system enjoys the required flexibility while meeting the existing standards in every feasible detail. Further, this paper provides an account on the extensive measurement campaign conducted with our implementation. The resulting real-world measurements from this campaign quantify the numerical effects of D2D functionality on the resultant system performance. Consequently, they shed light on the general applicability of LTE-assisted WFD solutions and associated operational ranges.
Shestakov, Nikolay V.,Takahashi, Hiroaki,Ohzono, Mako,Prytkov, Alexander S.,Bykov, Victor G.,Gerasimenko, Mikhail D.,Luneva, Margarita N.,Gerasimov, Grigory N.,Kolomiets, Andrey G.,Bormotov, Vladimir Elsevier 2012 Tectonophysics Vol.524 No.-
<P><B>Abstract</B></P><P>Small coseismic offsets detectable using GPS techniques were found more than 2300km away from the Great Tohoku 2011 earthquake epicenter. Area of the most intense far-field co- and postseismic deformations with the maximum offset values exceeding 40 and 18mm, respectively, extends westward from Honshu Island to the Korean Peninsula, northeastern China and southern Far East Russia. Sakhalin Island does not exhibit notable displacements caused by the earthquake, in contrast to the adjacent territories. A rectangular fault model with uniform slip was developed based on the GPS-detected far-field coseismic displacements using the spherically layered Earth assumption. Both far- and near-field coseismic deformations are generally well described by a single-segment rupture of 200×96km<SUP>2</SUP>, characterized by thrust slip with minor strike-slip component of about 33m and by the seismic moment value of 1.9·10<SUP>22</SUP>N·m (Mw=8.8), which roughly constrains the major slip area. The resultant compact fault geometry revealed that the main portion of the seismic moment had been realized in a relatively small-sized rupture segment. The sensitivity of far-field GPS data to the major slip area might also be used in the development of a seismically generated giant tsunami warning system.</P> <P><B>Highlights</B></P><P>► Coseismic jumps exceeding 40mm have been detected in the far-field zone. ► Postseismic displacements greater than 18mm have also been recorded. ► In general, a simple fault model adequately explains the observed coseismic offsets. ► The main part of the seismic moment was realized by a small rupture segment. ► The far-field GPS data can be used in the development of a giant tsunami warning system.</P>
Papynov, E.K.,Belov, A.A.,Shichalin, O.O.,Buravlev, I. Yu,Azon, S.A.,Golub, A.V.,Gerasimenko, A.V.,Parotkina, Yu. А.,Zavjalov, A.P.,Tananaev, I.G.,Sergienko, V.I. Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.7
In the present study, an original spark plasma sintering-reactive synthesis (SPS-RS) method for minerallike ceramic materials based on SrAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> feldspar-like skeleton structure was used for the first time, promising solid-state matrices for reliable immobilization of high-energy <sup>90</sup>Sr. The method is based on the "in-situ" reaction of a mixture of SrO, Al<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> oxides when heated by a unipolar pulsed current under compacting pressure. The phase and elemental composition structure were studied. The dynamics of the consolidation of the reaction mixture of oxides was studied in the range of 900-1200 ℃. The study found the temperature of the high-speed (minutes) SPS-RS formation of single-phase SrAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> composition ceramic in the absence of intermediate reaction products with a relative density of up to 99.2% and compressive strength up to 145 MPa and a strontium leaching rate of 10<sup>-4</sup>g/cm<sup>2</sup>·day.