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11.
Given an M/G/ queue with input rate and service-time distribution G, we consider the problem of estimating and G from data on the queue-length process Q = (Qt). Our motivation is to study departures of G from exponentiality, following recent work of Bingham and Dunham (1997, Ann. Inst. Statist. Math., 49, 667–679). 相似文献
12.
John F. Bingham C. S. Marvel 《Journal of polymer science. Part A, Polymer chemistry》1972,10(2):497-502
The 1:1 salt of 12-(β-aminoethyl)abietan-18-amine and adipic acid has been prepared and polymerized. This salt has been copolymerized with the 1:1 salt of hexamethylenediamine and adipic acid. 12-(β-Aminoethyl)abietan-18-amine has been polymerized with isophthaloyl and terephthaloyl chlorides with triethylamine as catalyst and terpolymerized with terephthaloyl chloride and hexamethylenediamine. All polymers have been characterized to some extent, and mechanical properties are reported for two of the polyamide films. 相似文献
13.
Trines R Bingham R Silva LO Mendonça JT Shukla PK Mori WB 《Physical review letters》2005,94(16):165002
The interaction between broadband drift mode turbulence and zonal flows has been studied through the wave-kinetic approach. Simulations have been conducted in which a particle-in-cell representation is used for the quasiparticles, while a fluid model is employed for the plasma. The interactions have been studied in a plasma edge configuration which has applications in both tokamak physics and magnetopause boundary layer studies. Simulation results show the development of a zonal flow through the modulational instability of the drift wave distribution, as well as the existence of solitary zonal flow structures about an ion gyroradius wide, drifting towards steeper relative density gradients. 相似文献
14.
M. Sawicka I. Matea H. Grawe R. Grzywacz M. Pfützner M. Lewitowicz J. M. Daugas B. A. Brown A. Lisetskiy F. Becker G. Bélier C. Bingham R. Borcea E. Bouchez A. Buta E. Dragulescu G. de France G. Georgiev J. Giovinazzo F. Hammache F. Ibrahim P. Mayet V. Méot F. Negoita F. De Oliveira-Santos O. Perru O. Roig K. Rykaczewski M. G. Saint-Laurent J. E. Sauvestre O. Sorlin M. Stanoiu I. Stefan C. Stodel Ch. Theisen D. Verney J. Żylicz 《The European Physical Journal A - Hadrons and Nuclei》2004,22(3):455-459
A decay spectroscopy study of the neutron-rich cobalt isotopes has been performed using fragmentation of a 86Kr36+ beam and the new LISE2000 spectrometer at GANIL. For 71Co and 73Co, the -delayed radiation has been observed for the first time, and the half-lives were found to be 79(5) ms and 41(4) ms, respectively. Features of the decay are discussed qualitatively in terms of nuclear models. 相似文献
15.
Karny M Grzywacz RK Batchelder JC Bingham CR Gross CJ Hagino K Hamilton JH Janas Z Kulp WD McConnell JW Momayezi M Piechaczek A Rykaczewski KP Semmes PA Tantawy MN Winger JA Yu CH Zganjar EF 《Physical review letters》2003,90(1):012502
Fine structure in proton emission from the 3.1(3) mus activity of 145Tm was discovered by using a novel technique of digital processing of overlapping recoil implantation and decay signals. Proton transitions to the ground state of 144Er and to its first excited 2(+) state at 0.33(1) MeV with a branching ratio I(p)(2(+))=9.6+/-1.5% were observed. The structure of the 145Tm wave function and the emission process were analyzed by using particle-core vibration coupling models. 相似文献
16.
Gordeev SN Zhukov AA de Groot PA Jansen AG Gagnon R Taillefer L 《Physical review letters》2000,85(21):4594-4597
We report on transport measurements of YBa 2Cu 3O (7-delta) single crystals with different oxygen contents in the geometry B, J ||ab (J perpendicularB). Our data show that the vortices become confined between the Cu-O planes below a well-defined temperature at which the effective size 2xi of the vortex core is approximately equal to the period of the Cu-O layers. This confinement strongly increases the vortex liquid freezing temperature. A new melting line is found separating a vortex liquid and a smectic phase, which shows an oscillatory field dependence reflecting differences between commensurate and incommensurate smectic states. 相似文献
17.
Ming Xia LI Yan Ming WANG Ru Ru CHEN* Research Institute of Elemento-Organic Chemistry Nankai University Tianjin Pittsburgh University Medical Center Pittsburgh PA U. S. A 《中国化学快报》2001,(6)
The chiral diols ((,(,((,((-Tetraaryl-1,3-dioxolane-4,5-dimethanols) have been used for the formation of cyclic titanates and similar derivatives of Mg, Al and Zr. These complexes of oxophilic metal centers were employed in catalytic and stiochiometric enantioselective reactions such as enantioselective addition reactions of carbon-centered nucleophiles to aldehydes1, [2+2] cycloadditions2, and Diels-Alder reactions3. So far, the two hydrogen atoms of all this type of diols are in trans form… 相似文献
18.
We consider diffraction by a semi-infinite crack located alonga fusion interface between two differing elastic media. Twotypes of crack, namely open and partially closed cracks, areinvestigated. An open crack is modelled by a stress-free contactboundary condition and a partially closed crack is modelledby a spring contact boundary condition. For the latter, thejump in the stress across the crack is assumed to be proportionalto the jump in the displacement across the crack. This situationarises in, for example, a K-weld where the fine grain of theparent material (for example, ferritic or forged austeniticsteel) is in stark contrast with the coarse-grained weld metal(for example, austenitic weld metal). In the metal weld thedirection of the grain axis varies through the metal. However,diffraction is a local phenomenon and so the austenitic steelis assumed to have a zonal axis so that it may be modelled bya transversely isotropic composite. The ferritic or forged austeniticsteel will be modelled as an isotropic material. 相似文献
19.
20.
Mazzocchi C Grzywacz R Liddick SN Rykaczewski KP Schatz H Batchelder JC Bingham CR Gross CJ Hamilton JH Hwang JK Ilyushkin S Korgul A Królas W Li K Page RD Simpson D Winger JA 《Physical review letters》2007,98(21):212501
An alpha-decay branch of (1.4+/-0.4) x 10(-4) has been discovered in the decay of 109I, which predominantly decays via proton emission. The measured Q(alpha) value of 3918+/-21 keV allows the indirect determination of the Q value for proton emission from 105Sb of 356+/-22 keV, which is approximately of 130 keV more bound than previously reported. This result is relevant for the astrophysical rapid proton-capture process, which would terminate in the 105Sn(p,gamma)106Sb(p,gamma)107Te(alpha decay)103Sn cycle at the densities expected in explosive hydrogen burning scenarios, unless unusually strong pairing effects result in a 103Sn(p,gamma)104Sb(p,gamma)105Te(alpha decay)101Sn) cycle. 相似文献