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71.
E. Wedekind W. E. Cohen W. Ender P. S. Billington F. A. Simmonds P. K. Baird W. M. Bray G. J. Ritter R. M. Seborg R. L. Mitchell H. A. Iddles P. J. Robbins W. J. Powell H. Whittacker N. C. Pervier R. A. Gortner A. Jolles A. Brüning M. Schnetka T. H. Whitehead R. C. Griffing C. G. Schwalbe Käte Berting Rütgerswerke A. -G. M. Dreifuß A. Staab W. Krieg H. Pflug H. Jacob R. Kaesbohrer und H. Schmitz 《Fresenius' Journal of Analytical Chemistry》1935,100(1-2):64-75
Ohne Zusammenfassung 相似文献
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A wave absorption filter for the far‐end boundary of semi‐infinite large reservoirs is developed for numerical simulation of unsteady free surface flows. Mathematical model is based on finite volume solution of the Navier–Stokes equations and depth‐integrated continuity equation to track the free surface. The Sommerfeld boundary condition is applied at the far‐end of the truncated computational domain. A dissipation zone is formed by applying artificial pressure on water surface to dissipate the kinetic energy of the outgoing waves. The computational scheme is tested to verify the conservation of total fluid volume in the domain for long simulation durations. Combination of the Sommerfeld boundary and dissipation zone can effectively minimize reflections and prevent cumulative changes in total fluid volume in the domain. Solitary wave, nonlinear periodic waves and irregular waves are simulated to illustrate the numerical developments. Earthquake excited surface waves and nonlinear hydrodynamic pressures in a dam–reservoir are computed. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
75.
B. Schwartz Ch. Ender D. Habs D. Schwalm M. Dahlinger E. Kankeleit H. Folger R. S. Simon H. Backe 《Zeitschrift für Physik A Hadrons and Nuclei》1986,325(4):489-490
The ß-decay half-life of130Cd has been measured and its importance as N=82 ‘waiting-point’ nucleus for astrophysical rapid neutron capture (r?) process scenarios is discussed. 相似文献
76.
A. Ashkin P. W. Smith J. M. Dziedzic W. J. Siekhaus W. H. Lowdermilk J. E. Swain R. L. Cone D. A. Ender M. S. Otteson Paula L. Fisher J. M. Friedman H. J. Guggenheim Liang Peihui Gu Zhongmin Zhang Weiqing J. -M. Halbout C. L. Tang S. D. Durbin S. M. Arakelian M. M. Cheung Y. R. Shen M. W. Sigrist V. G. Mikhalevich Liu Songhao Ho Kexlang Hui Lingkai Cui Junwen Li Qun D. G. Seiler D. Heiman R. Feigenblatt R. L. Aggarwal B. Lax H. P. Trommsdorff L. R. Andrews R. M. Hochstrasser R. Reinisch M. Nevière 《Applied physics. B, Lasers and optics》1982,28(2-3):142-149
77.
Automating high school timetabling is a challenging task. This problem is a well known hard computational problem which has been of interest to practitioners as well as researchers. High schools need to timetable their regular activities once per year, or even more frequently. The exact solvers might fail to find a solution for a given instance of the problem. A selection hyper-heuristic can be defined as an easy-to-implement, easy-to-maintain and effective ‘heuristic to choose heuristics’ to solve such computationally hard problems. This paper describes the approach of the team hyper-heuristic search strategies and timetabling (HySST) to high school timetabling which competed in all three rounds of the third international timetabling competition. HySST generated the best new solutions for three given instances in Round 1 and gained the second place in Rounds 2 and 3. It achieved this by using a fairly standard stochastic search method but significantly enhanced by a selection hyper-heuristic with an adaptive acceptance mechanism. 相似文献
78.
We have considered the spatially homogeneous problem of the behavior of an ion admixture in a background gas after applying a harmonic electric field with arbitrary parameters for various laws of interaction of particles. The Boltzmann equation has been solved using the modified method of moments. The ion distribution function and its first moments have been analyzed. It has been shown that the universal analytic expressions for the current density and the ion energy that we derived earlier for a small field amplitude-tofrequency ratio have a considerably wider range of applications. 相似文献
79.
CuCN catalyzed alkyl-allyl coupling under magnesium-Barbier conditions occurs regioselectively and affords predominantly the γ-products in good to high yields. This one-pot CuCN catalyzed reaction utilising Mg, an alkyl halide and an allylic substrate in THF at room temperature provides an easy alternative to the classical CuCN catalyzed γ-allylation of alkyl Grignard reagents. 相似文献
80.
The selectivity of organyl group transfer in the copper catalyzed benzoylation of n-butyl phenylzinc in THF depends on N-, O- or P-donor cosolvents and additives as well as copper salts and Lewis acids. In THF:NMP (3:1) and in THF:diglyme (2:1), n-butyl group/ phenyl group transfer ratio is 9:1 whereas only n-butyl group transfer is observed in THF:n-Bu3P (1 equiv.) and only phenyl group transfer is observed in THF:TMEDA (2:1). 相似文献