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191.
Alan C Lazer Anthony W Leung Diego A Murio 《Journal of Computational and Applied Mathematics》1982,8(4):243-252
In this article a system of semilinear elliptic partial differential equations is studied. This system determines the equilibria of the Volterra-Lotka equations describing prey-predator interactions with diffusion. To analyze the system, a new monotone scheme is presented. A rigorous foundation is given for numerical calculations by adapting a suitable finite difference method to the new monotone scheme. Earlier theories in finite differences are not successful in solving the system without this scheme. 相似文献
192.
Diego Cortes José Luis Rios Angel Villar Serafin Valverde 《Tetrahedron letters》1984,25(30):3199-3202
The structures of Cherimolin and Dihydrocherimolin, two new antimicrobial γ-lactone-bis-tetrahydrofuranes from Mill., Annonaceae, have been elucidated by spectroscopic analysis. 相似文献
193.
The evolution of a class of inhomogeneous spherically symmetric universe models possessing a varying cosmological term and a material fluid, with an adiabatic index either constant or not, is studied. 相似文献
194.
Gian Fabrizio De Angelis Diego De Falco Francesco Guerra 《Physics letters. [Part B]》1977,68(3):255-257
We consider Wilson's lattice approximation to scalar Quantum Electrodynamics. We establish correlation inequalities of Griffiths-Kelly-Sherman type and a rigorous transfer matrix formalism, from which existence and non triviality of the infinite volume limit follow. 相似文献
195.
Diego Pavón 《General Relativity and Gravitation》1988,20(6):595-601
By means of the Landau-Lifshitz theory for nonequilibrium thermodynamical fluctuations we calculate the correlations in the rate of dissipative fluxes of a gas of heterotic superstrings. We briefly comment on the cosmological consequences. 相似文献
196.
197.
Gian Fabrizio De Angelis Diego de Falco Francesco Guerra 《Communications in Mathematical Physics》1977,57(3):201-212
Wilson's lattice approximation allows us to apply classical statistical mechanics ideas to the study of Scalar Quantum Electrodynamics. Our main tools are Griffiths-Kelly-Sherman inequalities, the transfer matrix formalism and exponential bounds. Our main result is the existence of the infinite volume limit for every value of the coupling parameters. 相似文献
198.
Camden JP Bechtel HA Ankeny Brown DJ Martin MR Zare RN Hu W Lendvay G Troya D Schatz GC 《Journal of the American Chemical Society》2005,127(34):11898-11899
A comparison between theory and experiment for the benchmark H + CD4 --> HD + CD3 abstraction reaction yields a reinterpretation of the reaction mechanism and highlights the unexpected contribution of a stripping mechanism. Whereas the best analytic surface fails to reproduce experiment, a first-principles direct-dynamics (on the fly) treatment is in good agreement, showing that the H + CD4 reaction exhibits extreme sensitivity to modest differences in the potential energy surface. We find that bent H-D-C transition state geometries play an important role in the dynamics. A simple model that relates the scattering angle impact parameter and cone of acceptance accounts well for the overall reaction dynamics. 相似文献
199.
200.
An ionic liquid piezoelectric gas sensor was demonstrated for detection of polar and nonpolar organic vapors at high temperature with fast linear and reversible response. 相似文献