Výsledky vyhledávání

Analysis of critical current inhomogeneity in r–z plane of GdBCO superconducting bulk and simulation of flux jumps during pulsed field magnetization

Autor: J T Hu, W J Yang, D F Zhou, P Zhao, X D Li, F W Deng, J Z Yan

Publikováno v: Superconductor Science and Technology. 36:055004

In pulsed field magnetization (PFM), the phenomenon of flux jump is capable of driving magnetic flux vortexes into the GdBCO superconducting bulk center to aid full magnetization. Various homogeneous critical current density (J c) models have been im

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b94dab235f8986e32ccd2e0f45f75976
https://doi.org/10.1088/1361-6668/acbe72

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Loading capacity, rotation loss and torsional oscillation research on an Evershed-type hybrid superconducting bearing used for micro-thrust measurements

Autor: Z X Liu, W J Yang, P Zhao, F W Deng, J Z Yan, J X Ren, H B Tang

Publikováno v: Superconductor Science and Technology. 35:124003

Characterized by their very low rotational drag, applications of high-temperature superconductor (HTS) bearings have been expanded in some high-precision instruments. We have developed a sensitive magnetic suspension stand based on an Evershed-type h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f901eb08012e5cf909376c00423f4309
https://doi.org/10.1088/1361-6668/ac96b5

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Wavelet characterization of multiplier spaces

Autor: Qixiang Yang, F.-W. Deng

Publikováno v: Mathematical Methods in the Applied Sciences. 35:2085-2094

We study the wavelet characterization of multiplier spaces between pair of Sobolev spaces. We develop techniques of special decompositions of function products and apply the delicate estimates of wavelet coefficients to get multiplier space character

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29b7d6dc33361b0cbfb54ac3c5d1e93e
https://doi.org/10.1002/mma.2638

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Akademický článek

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Higher-order corrections to the flow velocity covariance tensor, revisited

Autor: F.-W. Deng, John H. Cushman

Publikováno v: Water Resources Research. 34:103-106

Recently the authors presented an accurate (in the variance of fluctuating log conductivity), second-order solution to the steady, saturated flow problem. The longitudinal, second spatial moment was evaluated numerically on the basis of the perturbat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::caa95b36c29e57056562b2472dc741da
https://doi.org/10.1029/97wr02610

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On Higher-Order Corrections to the Flow Velocity Covariance Tensor

Autor: John H. Cushman, F. W. Deng

Publikováno v: Water Resources Research. 31:1659-1672

Second-order log fluctuating conductivity variance (σƒ2) corrections to the head and velocity covariance functions are derived for a lognormal, stationary hydraulic conductivity field. The Fourier transform method proposed by Deng et al. (1993) is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87bfe5050113e4b62c0e867d1ca393c4
https://doi.org/10.1029/94wr02974

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Adaptive estimation of the log fluctuating conductivity from tracer data at the Cape Cod Site

Autor: John H. Cushman, Jacques W. Delleur, F. W. Deng

Publikováno v: Water Resources Research. 29:4011-4018

An adaptive estimation scheme is used to obtain the integral scale and variance of the log-fluctuating conductivity at the Cape Cod site based on the fast Fourier transform/stochastic model of Deng et al. (1993) and a Kalmanlike filter. The filter in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ab5906dfcbb016703a85ee0e7e85042
https://doi.org/10.1029/93wr02480

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A Fast Fourier transform stochastic analysis of the contaminant transport problem

Autor: John H. Cushman, F. W. Deng, Jacques W. Delleur

Publikováno v: Water Resources Research. 29:3241-3247

A three-dimensional stochastic analysis of the contaminant transport problem is developed in the spirit of Naff (1990). The new derivation is more general and simpler than previous analysis. The fast Fourier transformation is used extensively to obta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::51d8834cb2efb5c67b024970197d8213
https://doi.org/10.1029/93wr01236

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Multiscale adaptive estimation of the conductivity field from head and tracer data

Autor: John H. Cushman, K. K. Lee, F. W. Deng

Publikováno v: Stochastic Hydrology and Hydraulics. 7:66-82

Large scale fluctuations in the conductivity field are regionalized and estimated via a maximum likelihood, adjoint-state methodology. Small-scale fluctuations within each region are estimated adaptively via a Kalman-like stochastic filter. The varia

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::396cd8a3b8cef67d18ce35777db9e35f
https://doi.org/10.1007/bf01581567

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Akademický článek

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