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41.
Dasu S de Barbaro P Bodek A Harada H Krasny MW Lang K Riordan EM Arnold R Benton D Bosted P Clogher L deChambrier G Lung A Rock SE Szalata ZM Walker RC Filippone BW Jourdan J Milner R McKeown R Potterveld D Para A Dietrich F Van Bibber K Button-Shafer J Debebe B Hicks RS Gearhart R Whitlow LW Alster J 《Physical review letters》1988,60(25):2591-2594
42.
The single-mode Richtmyer-Meshkov hydrodynamic instability at light/heavy (air/SF6 and air/CO2), close density (air/N2), and heavy/light (air/He) interfaces has been experimentally studied for a low incident shock wave Mach number. Two identical 2D half sinusoidal initial perturbations, with a relatively high initial amplitude, were considered in order to rapidly reach the nonlinear regime and check the reduction of the initial growth rate compared to that predicted by the small-amplitude theory. The growth rate measurements for the air/SF6 and air/CO2 cases are in excellent agreement with the nonlinear model of Sadot et al. coupled with a reduction factor suggested by Rikanati et al. In the air/N2 case, the reversal phase can be precisely described by the linear theory. Finally, the heavy/light experiment is well described by the Vandenboomgaerde model also coupled with a smaller reduction factor. 相似文献
43.
G. Jourdan L. Schwaederlé L. Houas J.-F. Haas A.N. Aleshin S.V. Sergeev S.G. Zaytsev 《Shock Waves》2001,11(3):189-197
A constant temperature hot-wire anemometry method is applied to the study of mixing zones induced by the interaction of a
shock wave with Mach number 1.25 in air with air/helium (heavy/light), air/argon or air/krypton (light/heavy) initially plane
interfaces. The single wire gauge is positioned at various locations along the shock tube axis. At the present stage of our
investigation, although the analysis of the hot-wire signal is not achieved yet, we report the interesting concept of using
hot-wire anemometry as a diagnostic method for shock tube studies of the Richtmyer-Meshkov instability. Based on this preliminary
work, we discuss prospective experimental signal conversion, in order to provide some new results for this field of investigation,
in particular for resolving characteristics of the turbulent mixing zone which is of most interest.
Received 3 August 2000 / Accepted 15 February 2001 相似文献
44.
Th. Pospischil P. Bartsch D. Baumann R. Böhm K. Bohinc M. Ding S. Derber M.O. Distler D. Elsner I. Ewald J. Friedrich J.M. Friedrich S. Grözinger S. Hedicke P. Jennewein J. Jourdan M. Kahrau F. Klein K.W. Krygier J. Lac A. Liesenfeld S. Malov J. McIntyre H. Merkel P. Merle U. Müller R. Neuhausen M. Potokar R.D. Ransome D. Rohe G. Rosner J. Sanner H. Schmieden M. Seimetz S. Širca I. Sick O. Strähle A. Süle A. Wagner Th. Walcher M. Weis 《The European Physical Journal A - Hadrons and Nuclei》2001,12(1):125-127
The polarization transfer from longitudinally polarized electrons to protons in the elastic scattering p(
e, e'
p) has been measured around Q2 = 0.4 (GeV/c)2 with the three-spectrometer facility at the Mainz microtron MAMI. From this polarization transfer the ratio G
Ep/(G
Mp/μp) has been determined. The ratio is found to be slightly less than unity in agreement with recent results from other laboratories
and from the Rosenbluth separation of cross-sections measured with unpolarized electrons.
Received: 26 July 2001 / Accepted: 25 September 2001 相似文献
45.
P. Achenbach D. Baumann R. Böhm B. Boillat D. Bosnar C. Carasco M. Ding M. O. Distler J. Friedrich W. Glöckle J. Golak Y. Goussev P. Grabmayr W. Heil A. Hügli P. Jennewein G. Jover Ma nas J. Jourdan H. Kamada T. Klechneva B. Krusche K. W. Krygier J. G. Llongo M. Lloyd M. Makek H. Merkel C. Micheli U. Müller A. Nogga R. Neuhausen Ch. Normand L. Nungesser A. Ott E. Otten F. Parpan R. Pérez Benito M. Potokar D. Rohe D. Rudersdorf J. Schmiedeskamp M. Seimetz I. Sick S. Širca R. Skibiński S. Stave G. Testa R. Trojer Th. Walcher M. Weis H. Witała H. Wöhrle 《The European Physical Journal A - Hadrons and Nuclei》2005,25(2):177-183
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The timing problem in the bi-objective just-in-time single-machine job-shop scheduling problem (JiT-JSP) is the task to schedule N jobs whose order is fixed, with each job incurring a linear earliness penalty for finishing ahead of its due date and a linear tardiness penalty for finishing after its due date. The goal is to minimize the earliness and tardiness simultaneously. We propose an exact greedy algorithm that finds the entire Pareto front in \(O(N^2)\) time. This algorithm is asymptotically optimal. 相似文献
50.
Two backaction (BA) processes generated by an optical cavity-based detection device can deeply transform the dynamical behavior of an atomic force microscopy microlever: the photothermal force or the radiation pressure. Whereas noise damping or amplifying depends on the optical cavity response for radiation pressure BA, we present experimental results carried out under vacuum and at room temperature on the photothermal BA process which appears to be more complex. We show for the first time that it can simultaneously act on two vibration modes in opposite directions: Noise on one mode is amplified, whereas it is damped on another mode. Basic modeling of photothermal BA shows that the dynamical effect on the mechanical mode is laser spot position-dependent with respect to mode shape. This analysis accounts for opposite behaviors of different modes as observed. 相似文献