Zeitschrift für angewandte Mathematik und Physik

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Eigenvalue inclusions for second-order ordinary differential operators by a numerical homotopy method
Zeitschrift für angewandte Mathematik und Physik - Tập 41 - Trang 205-226 - 1990
Michael Plum
Inclusion intervals for the firstN eigenvalues of a second-order ordinary differential operator with boundary conditions of Sturm-Liouville or of periodic type are derived by a combination of “elementary” estimates, an appropriate numerical procedure and a homotopy algorithm.
Self-regulating regime of plasma heating by laser radiation
Zeitschrift für angewandte Mathematik und Physik - - 1965
O. N. Krokhin
Aspects of the turbulence problem
Zeitschrift für angewandte Mathematik und Physik - Tập 3 - Trang 407-426 - 1952
Hans W. Liepmann
Die Arbeit gibt einen Überblick über einige Probleme der neueren Turbulenzforschung. Nach einer allgemeinen Einleitung werden zuerst elementare, für die Turbulenztheorie wichtige Resultate der Theorie homogener, stochastischer Vorgänge diskutiert. Im dritten Teil werden sodann Beispiele linearer Systeme behandelt, bei denen die äusseren Kräfte von turbulenten Schwankungen herrühren. Im vierten Tei...... hiện toàn bộ
On radiative-transfer problems with reflective boundary conditions and internal emission
Zeitschrift für angewandte Mathematik und Physik - Tập 35 - Trang 144-155 - 1984
C. E. Siewert
An integral-transform technique and theF N method are used to solve basic radiative-transfer problems. Boundary conditions that account for specular and diffuse reflection as well as external illumination are used, and internal emission is allowed. Emphasis is given to the azimuthally symmetric component of the complete radiation field.
The ‘electromagnetic’ Wigner equation for an electron with spin
Zeitschrift für angewandte Mathematik und Physik - Tập 40 - Trang 793-815 - 1989
Anton Arnold, Herbert Steinrück
We derive and analyse the three-dimensional quantum Liouville equation for an electron with spin in an external electromagnetic field. By using methods of semigroup theory, we prove existence and uniqueness of the initial value problem. Expanding the solution into a series of pure states, we derive the existence of a generalized particle density and anL ∞-estimate on the solution. The last section...... hiện toàn bộ
Nonlinear vibrations of elastic circular plates exhibiting rectilinear orthotropy
Zeitschrift für angewandte Mathematik und Physik - - 1963
Jerzy L. Nowinski
Es werden mittels einer Verallgemeinerung der von-Kármánschen Gleichungen auf den dynamischen und orthotropen Fall die nichtlinearen Schwingungen elastisch orthotroper Kreisplatten untersucht. Die Bewegungsgleichung wird mittels des Galerkin-Verfahrens von den Ortsvariablen befreit. Als Beispiel wird Einspannung des Randes unter Erhaltung der radialen Verschieblichkeit angenommen, und es wird unte...... hiện toàn bộ
Buchbesprechungen
Zeitschrift für angewandte Mathematik und Physik - Tập 3 - Trang 238-240 - 1952
P. Scherrer, H. Rutischauser, M. Plancherel
Randomly oscillating turbulent channel flows
Zeitschrift für angewandte Mathematik und Physik - Tập 15 - Trang 375-381 - 1964
John H. Lienhard, C. L. Tien
The velocity response to a sinusoidally oscillating pressure gradient is obtained for turbulent flow in a two-dimensional channel. The statistical relations between a spectrum of such pressure pulsations and the resulting spectrum of velocity oscillations are then written in terms of a spectral transfer function. This function, which incorporates the dynamic solution is complicated, but is well ap...... hiện toàn bộ
Diffraction of a spherical electromagnetic wave by a perfectly conducting half plane in a homogeneous biisotropic medium
Zeitschrift für angewandte Mathematik und Physik - - 1997
S. Asghar, Tasawar Hayat, G. H. Zahid
Partial integrability for general nonlinear systems
Zeitschrift für angewandte Mathematik und Physik - Tập 54 - Trang 26-47 - 2003
K. H. Kwek, Y. Li, S. Shi
The purpose of this paper is to find a criterion of partial integrability for general nonlinear systems. Here partial integrability means the existence of a certain numbers of first integrals less than the number required for the complete integration [10]. We also give an algebraic criterion of partial integrability for general semi-quasihomogeneous systems.
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