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A NEW APPROACH TO THE EQUATIONS FOR THE STEADY STATE CURRENTS AT MICROELECTRODES:EC'PROCESSES(SECOND ORDER REACTION) 被引量:1
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作者 Qian Kun ZHUANG Hong Yuan CHEN Department of Chemistry,Nanjing University,210008,Nanjing 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第9期723-726,共4页
With a new approach,the general current expressions of two typical second order catalytic reactions at microelectrodes are obtained.This allows the study of fast chemical reactions and systems where the reactants are ... With a new approach,the general current expressions of two typical second order catalytic reactions at microelectrodes are obtained.This allows the study of fast chemical reactions and systems where the reactants are present in similar concentrations. 展开更多
关键词 EC A NEW APPROACH TO THE equationS FOR THE STEADY STATE currentS AT MICROELECTRODES SECOND ORDER REACTION AT
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THE VERIFICATION OF THE CURRENT TRANSIENT EQUATION AT TUBULAR ELECTRODES IN A FLOWING FLUID UNDER POTENTIAL STEP
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作者 Song Ying MO and Ying Sing FUNG Department of Chemistry, University of Hong Kong, Hong Kong 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第3期191-192,共2页
The equation derived for the response of the current transients in the flowing fluid is verified experimentally.
关键词 THE VERIFICATION OF THE current TRANSIENT equation AT TUBULAR ELECTRODES IN A FLOWING FLUID UNDER POTENTIAL STEP AT
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Numerical Simulation for Refraction-Diffraction of Waves in Water of Slowly Varying Current and Topography 被引量:5
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作者 Hong, GW Feng, WB +1 位作者 Xia, QY Pan, SH 《China Ocean Engineering》 SCIE EI 1997年第4期373-386,共14页
A new numerical finite difference iteration method for refraction-diffraction of waves ia water of slowly varying current and topography is developed in this paper. And corresponding theoretical model including the di... A new numerical finite difference iteration method for refraction-diffraction of waves ia water of slowly varying current and topography is developed in this paper. And corresponding theoretical model including the dissipation term is briefly described, together with some analysis and comparison of computational results of the model with measurements in a hydraulic scale model (Berkhoff et al., 1982). An example of practical use of the method is given, showing that the present model is useful to engineering practice. 展开更多
关键词 refraction-diffraction of waves on current wave number conservation wave action conservation Eikonal equation time dependent mild slope equation on current energy dissipation
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The equation of chronoamperometric current on an oblate hemispheroid microelectrode and its verification
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作者 Diao, GW Li, L Zhang, ZX 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1996年第4期331-337,共7页
With the aspect of equivalent diffusion layer an analytical chronoamperometric current equation on an oblate hemispheroid microelectrode for reversible electrochemical condition is derived. To verify this equation the... With the aspect of equivalent diffusion layer an analytical chronoamperometric current equation on an oblate hemispheroid microelectrode for reversible electrochemical condition is derived. To verify this equation the chronoammograms have been obtained with benzoquinone in McIlvaine buffer solution (pH 7.0) at a mercury oblate hemispheroid microelectrode. The experimental results agree with the theoretical conclusions. 展开更多
关键词 chronoamperometric current equation oblate hemispheroid microelectrode reduction of benzoquinone
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CONVERGENCE OF ADAPTIVE EDGE ELEMENT METHODS FOR THE 3D EDDY CURRENTS EQUATIONS 被引量:5
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作者 R.H.W.Hoppe J.Schberl 《Journal of Computational Mathematics》 SCIE CSCD 2009年第5期657-676,共20页
We consider an Adaptive Edge Finite Element Method (AEFEM) for the 3D eddy currents equations with variable coefficients using a residual-type a posteriori error estimator. Both the components of the estimator and c... We consider an Adaptive Edge Finite Element Method (AEFEM) for the 3D eddy currents equations with variable coefficients using a residual-type a posteriori error estimator. Both the components of the estimator and certain oscillation terms, due to the occurrence of the variable coefficients, have to be controlled properly within the adaptive loop which is taken care of by appropriate bulk criteria. Convergence of the AEFEM in terms of reductions of the energy norm of the discretization error and of the oscillations is shown. Numerical results are given to illustrate the performance of the AEFEM. 展开更多
关键词 Adaptive edge elements 3D eddy currents equations Convergence analysis Error and oscillation reduction Residual type a posteriori error estimates.
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Bosonic Operator Realization of Hamiltonian for a Superconducting QuantumInterference Device
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作者 FANHong-Yi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2004年第6期878-880,共3页
Based on the appropriate bosonic phase operator diagonalized in the entangled state representation we construct the Hamiltonian operator model for a superconducting quantum interference device. The current operator an... Based on the appropriate bosonic phase operator diagonalized in the entangled state representation we construct the Hamiltonian operator model for a superconducting quantum interference device. The current operator and voltage operator equations are derived. 展开更多
关键词 SQUID Hamiltonian operator model current operator and voltage operator equations
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NUMERICAL SIMULATION OF A MATHEMATICAL MODEL FOR WAVE PROPAGATION ON NON-UNIFORM CURRENT AND DEPTH 被引量:4
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作者 ZhangHong-sheng DingPing-xing +1 位作者 PanJun-ning HongGuang-wen 《Journal of Hydrodynamics》 SCIE EI CSCD 2003年第2期43-50,共8页
A water wave evolution equation is developed from the combinedrefraction-diffraction equation on non-uniform current in water of slowly varying topography byusing the perturbation method. A numerical model is presente... A water wave evolution equation is developed from the combinedrefraction-diffraction equation on non-uniform current in water of slowly varying topography byusing the perturbation method. A numerical model is presented with the governing equationdiscretized with an improved Alternating Direction Impicit (ADI) method involving a relaxationfactor which can improve convergent rate. The calculation results show that the model caneffectively reflect the effects of current on wave propagation. 展开更多
关键词 water wave evolution equation with current mathematical model numericalsimulation
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daptive Hybridized Interior Penalty Discontinuous Galerkin Methods for H(curl)-Elliptic Problems 被引量:1
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作者 C.Carstensen R.H.W.Hoppe +1 位作者 N.Sharma T.Warburton 《Numerical Mathematics(Theory,Methods and Applications)》 SCIE 2011年第1期13-37,共25页
We develop and analyze an adaptive hybridized Interior Penalty Discontinuous Galerkin(IPDG-H)method for H(curl)-elliptic boundary value problems in 2D or 3D arising from a semi-discretization of the eddy currents equ... We develop and analyze an adaptive hybridized Interior Penalty Discontinuous Galerkin(IPDG-H)method for H(curl)-elliptic boundary value problems in 2D or 3D arising from a semi-discretization of the eddy currents equations.The method can be derived from a mixed formulation of the given boundary value problem and involves a Lagrange multiplier that is an approximation of the tangential traces of the primal variable on the interfaces of the underlying triangulation of the computational domain.It is shown that the IPDG-H technique can be equivalently formulated and thus implemented as a mortar method.The mesh adaptation is based on a residual-type a posteriori error estimator consisting of element and face residuals.Within a unified framework for adaptive finite element methods,we prove the reliability of the estimator up to a consistency error.The performance of the adaptive symmetric IPDG-H method is documented by numerical results for representative test examples in 2D. 展开更多
关键词 Adaptive hybridized Interior Penalty Discontinuous Galerkin method a posteriori error analysis H(curl)-elliptic boundary value problems semi-discrete eddy currents equations
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The Grad-Shafranov reconstruction in twenty years: 1996–2016 被引量:3
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作者 HU Qiang 《Science China Earth Sciences》 SCIE EI CAS CSCD 2017年第8期1466-1494,共29页
We review and summarize the applications of the Grad-Shafranov(GS) reconstruction technique to space plasma structures in the Earth's magnetosphere and in the interplanetary space. We organize our presentations fo... We review and summarize the applications of the Grad-Shafranov(GS) reconstruction technique to space plasma structures in the Earth's magnetosphere and in the interplanetary space. We organize our presentations following the branches of the "academic family tree" rooted on Prof. Bengt U. ? Sonnerup, the inventor of the GS method. Special attentions are paid to validations of the GS reconstruction results via(1) the direct validation by co-spatial in-situ measurements among multiple spacecraft, and(2) indirect validation by implications and interpretations of the physical connection between the structures reconstructed and other related processes. For the latter, the inter-comparison and interconnection between the large-scale magnetic flux ropes(i.e., Magnetic Clouds) in the solar wind and their solar source properties are presented. In addition, we also summarize various GS-type(or-like) reconstruction and an extension of the GS technique to toroidal geometry. In particular,we point to a possible advancement with added complexity of "helical symmetry" and mixed helicity, in the hope of stimulating interest in future development. We close by offering some thoughts on appreciating the scientific merit of GS reconstruction in general. 展开更多
关键词 Grad-Shafranov equation Magnetohydrodynamics Magnetic clouds Magnetic flux ropes Magnetopause current sheets Flux transfer events Plasmoids Solar flare Coronal mass ejections
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