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61.
62.
A periodic dependence of the Stark parameters on the nuclear charge number for neutral and ion resonances has been found and discussed. 相似文献
63.
64.
65.
S.P. Puri 《Chemical physics letters》1974,28(4):582-585
The inadequacy of the available sets of crystal field parameters in explaining simultaneously the spectroscopic, magnetic and thermal properties of dysprosium ethylsulphate is brought out and a new optimum set is proposed to unify these characteristics. 相似文献
66.
67.
Ching-Yuan Chiang Madan L. Puri 《Annals of the Institute of Statistical Mathematics》1984,36(1):35-50
Summary In the linear regression modelX
i=α+βci+Zi, we consider the problem of testing the subhypothesis that some (but not all) components of β are equal to 0. A class of
asymptotically distribution-free tests based on a quadratic form in aligned rank statistic is studied and the asymptotic relative
efficiencies of the proposed tests with respect to the general likelihood ratio test and the test based on least-squares estimates
of regression parameters are derived. Asymptotic optimality (à la Wald) is also discussed.
Work done under the National Science Foundation Grant MCS 8301409 and NATO Grant 1465. 相似文献
68.
A numerical model has been developed that employs the penalty function finite element technique to solve the vertically averaged hydrodynamic and turbulence model equations for a water body using isoparametric elements. The full elliptic forms of the equations are solved, thereby allowing recirculating flows to be calculated. Alternative momentum dispersion and turbulence closure models are proposed and evaluated by comparing model predictions with experimental data for strongly curved subcritical open channel flow. The results of these simulations indicate that the depth-averaged two-equation k-ε turbulence model yields excellent agreement with experimental observations. In addition, it appears that neither the streamline curvature modification of the depth-averaged k-ε model, nor the momentum dispersion models based on the assumption of helicoidal flow in a curved channel, yield significant improvement in the present model predictions. Overall model predictions are found to be as good as those of a more complex and restricted three-dimensional model. 相似文献
69.
G. P. Shrivastav V. Banerjee S. Puri 《The European Physical Journal B - Condensed Matter and Complex Systems》2010,78(2):217-223
We study mass-transport models with multiple-chipping processes. The rates of these processes are
dependent on the chip size and mass of the fragmenting site. In this context, we consider k-chip
moves (where k = 1, 2, 3, ...); and combinations of 1-chip, 2-chip and 3-chip moves.
The corresponding mean-field (MF) equations are solved to obtain the steady-state probability
distributions, P(m) vs. m. We also undertake Monte Carlo (MC) simulations of these models. The
MC results are in excellent agreement with the corresponding MF results, demonstrating that MF
theory is exact for these models. 相似文献
70.
Kurt Binder Sanjay Puri Subir K. Das Jürgen Horbach 《Journal of statistical physics》2010,138(1-3):51-84
The kinetics of phase separation or domain growth, subsequent to temperature quenches of binary mixtures from the one-phase region into the miscibility gap, still remains a challenging problem of nonequilibrium statistical mechanics. We have an incomplete understanding of many aspects of the growth of concentration inhomogeneities, including the effect of surfaces on this process, and the interplay with wetting phenomena and finite-size effects in thin films. In the present paper, an overview of the simulation approaches to this problem is given, with an emphasis on solutions of a diffusive Ginzburg-Landau model. We also discuss two recent alternative approaches: a local molecular field approximation to the Kawasaki spin exchange model on a lattice; and molecular dynamics simulations of a fluid binary Lennard-Jones mixture. A brief outlook to open questions is also given. 相似文献