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51.
Jansen R Anil Kumar PS van't Erve OM Vlutters R de Haan P Lodder JC 《Physical review letters》2000,85(15):3277-3280
The role of thermal scattering in spin-dependent transport of hot electrons at 0.9 eV is studied using a spin-valve transistor with a soft Ni(80)Fe(20)/Au/Co base. Spin-dependent scattering makes the collected electron current depend sensitively on the magnetic state of the base. The magnetocurrent reaches 560% at 100 K, decays with increasing temperature, and a huge effect of 350% still remains at room temperature. The results demonstrate that thermal spin waves produce quasielastic spin-flip scattering of hot electrons, resulting in mixing of the two spin channels. 相似文献
52.
Laurens De Haan 《Stochastic Processes and their Applications》1974,2(3):243-259
A useful method to derive limit results for partial maxima and record values of independent, identically distributed random variables is to start from one specific probability distribution and to extend the result for this distribution to a class of distributions.This method involves an extended theory of regularly varying functions. In this paper, equivalence classes of regularly varying functions (in the extended sense) are studied, which is relevant to the problems mentioned above. 相似文献
53.
A.D. de Groot C. de Haan H.B. Hanekamp A.C. Joha E.W.B. de Leer 《Journal of organometallic chemistry》1976,122(2):241-248
The rearrangement of the t-butyl group in t-butylferrocenyl carbenium ions (VI) and the hydrogen—deuterium exchange in the methyl group of methylferrocenyl carbenium ions (XVI) has been studied. The reaction rates depend on the size of the substituents at the carbenium ion center, an increase in the size of the substituents causing an increase in the rate. This effect is attributed, on the basis of the Gleiter and Cais models of ferrocenyl substituted carbenium ions, to increased steric hindrance between the substituents and the unsubstituted cyclopentadienyl ring. 相似文献
54.
In R2 the integral of a regularly varying (RV) function f is regularly varying only if f is monotone. Generalization to R2 of the one-dimensional result on regular variation of the derivative of an RV-function however is straightforward. Applications are given to limit theory for partial sums of i.i.d. positive random vectors in R2+. 相似文献
55.
Laurens de Haan Elselien Taconis-Haantjes 《Annals of the Institute of Statistical Mathematics》1979,31(1):299-308
We extend the well known transformation technique for order statistics to get less restrictive conditions for the Bahadur
representation of sample quantiles. 相似文献
56.
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58.
Miguel A. MoralesLorin X. Benedict Daniel S. ClarkEric Schwegler Isaac TamblynStanimir A. Bonev Alfredo A. CorreaSteven W. Haan 《High Energy Density Physics》2012,8(1):5-12
We describe ab initio electronic structure calculations (density functional theory molecular dynamics and coupled electron-ion quantum Monte Carlo) of the equation of state (EOS) of hydrogen in a pressure-temperature regime relevant for simulating the initial phase of an inertial confinement fusion capsule implosion. We find the computed EOS to be quite close to that of the most recent SESAME table (constructed by G. Kerley, 2003). A simple density-dependent but temperature-independent correction brings the 2003-Kerley EOS into excellent agreement with ours in the chosen region of the hydrogen phase diagram. Simulations of fusion ignition experiments on the National Ignition Facility (NIF) with this modified 2003-Kerley table are shown to produce results nearly indistinguishable from those of the 2003-Kerley EOS, which was used to design the capsule. In this sense, we do not expect that further improvements to the hydrogen EOS in this particular regime will impact the capsule design. 相似文献
59.
R. E. De Haan 《Applied Scientific Research》1971,24(1):231-260
The aim of the investigation was primarily the computation of the dynamical corrections on the static calibration curve. A
brief account is given of the available analytical expressions for the heat transfer of a hot wire to the ambient airflow.
The appropriate form is inserted in the small perturbation energy equation giving, with constant values of the characteristic
parameters, a linear second order differential equation. A number of numerical examples was computed from the exact solution
yielding the influence of frequency on the sensitivity and the temperature distribution along the wire. The analysis is supplemented
by a short review of some complicating factors not included in the linear theory. 相似文献
60.
W. D. Cai N. Ramesh F. Tihminlioglu R. P. Danner J. L. Duda A. DHaan 《Journal of Polymer Science.Polymer Physics》2002,40(10):1046-1055
The capillary‐column inverse gas chromatography method was used to measure the diffusion and partition coefficients of ethylbenzene, styrene, and acrylonitrile in polybutadiene (PBD) at infinite dilution of the solvents. Experiments were performed over a temperature range of 50–125 °C. At temperatures well above the glass‐transition temperature of PBD, the diffusivities were correlated using an Arrhenius expression. The Arrhenius parameters in turn were intercorrelated and shown to be a function of the occupied volume, thus providing a method for predicting the diffusion of other solvents in the same polymer. Further, the activation energy was predicted using the Duda‐Vrentas free‐volume approach. The activation energy thus obtained was compared with the activation energy of the Arrhenius approach. The weight‐fraction activity coefficient data were compared to the predictions of the group contribution, lattice‐fluid equation‐of‐state, and the UNIquac Functional‐group Activity Coefficient (UNIFAC) free‐volume models. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 1046–1055, 2002 相似文献