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排序方式: 共有147条查询结果,搜索用时 15 毫秒
91.
Gero Friesecke Richard D James Maria Giovanna Mora Stefan Müller 《Comptes Rendus Mathematique》2003,336(8):697-702
We show that the nonlinear bending theory of shells arises as a Γ-limit of three-dimensional nonlinear elasticity. To cite this article: G. Friesecke et al., C. R. Acad. Sci. Paris, Ser. I 336 (2003). 相似文献
92.
Geometrical and optical benchmarking of copper(II) guanidine–quinoline complexes: Insights from TD‐DFT and many‐body perturbation theory (part II)
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93.
In the present paper we develop a representation of a norm frequently used in the analysis of multilevel methods. This allows
us to examine the convergence of additive Schwarz schemes also in the case of non-nested subspaces. We demonstrate the usefulness
of the given norm representation by studying in detail the stability of sparse grid splittings due to Griebel and Oswald,
which turns out to be a special case of our unified theory. Further applications concerning approximation spaces and non-nested
finite element spaces are given.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
94.
Klaus Gero Kalb 《Mathematische Annalen》1978,232(2):121-130
Ohne Zusammenfassung 相似文献
95.
96.
A.M. Sepulchre B. Septe G. Lukacs S.D. Gero W. Voelter E. Breitmaier 《Tetrahedron》1974,30(7):905-915
Configurational assignments to quaternary centres of 2-(l,3-dithianyl) branched-chain carbohydrates, important intermediates for the synthesis of carbohydrate-containing antibiotics, have been made through natural abundance 13C NMR spectroscopy. Configurations of quaternary carbons in 21, 24 and 26 were assigned by comparison with 13C spectra of structurally-related alicyclic derivatives 1–16. 相似文献
97.
Shchatsinin I Laarmann T Stibenz G Steinmeyer G Stalmashonak A Zhavoronkov N Schulz CP Hertel IV 《The Journal of chemical physics》2006,125(19):194320
The interaction of C60 fullerenes with 765-797 nm laser pulses as short as 9 fs at intensities of up to 3.7 x 10(14) W cm(-2) is investigated with photoion spectroscopy. The excitation time thus addressed lies well below the characteristic time scales for electron-electron and electron-phonon couplings. Thus, energy deposition into the system is separated from energy redistribution among the various electronic and nuclear degrees of freedom. Insight into fundamental photoinduced processes such as ionization and fragmentation is obtained from the analysis of the resulting mass spectra as a function of pulse duration, laser intensity, and time delay between pump and probe pulses, the latter revealing a memory effect for storing electronic energy in the system with a relaxation time of about 50 fs. Saturation intensities and relative abundances of (multiply charged) parent and fragment ions (C60(q+), q=1-6) are fingerprints for the ionization and fragmentation mechanisms. The observations indicate that for final charge states q>1 the well known C60 giant plasmon resonance is involved in creating ions and a significant amount of large fragments even with 9 fs pulses through a nonadiabatic multielectron dynamics. In contrast, for energetic reasons singly charged ions are generated by an essentially adiabatic single active electron mechanism and negligible fragmentation is found when 9 fs pulses are used. These findings promise to unravel a long standing puzzle in understanding C60 mass spectra generated by intense femtosecond laser pulses. 相似文献
98.
Fendler Gero; Grochenig Karlheinz; Leinert Michael 《Bulletin London Mathematical Society》2006,38(4):625-635
Let G be a compactly generated, locally compact group of polynomialgrowth. Removing a restrictive technical condition from a previouswork, we show that the weighted group algebra is a symmetric Banach *-algebra if and only if theweight function satisfies the GRS-condition. This conditionexpresses in a precise technical sense that grows subexponentially.2000 Mathematics Subject Classification 43A20, 22D15, 22D12. 相似文献
99.
100.
[reaction: see text] A simple and mild method for the coupling of aryl iodides and aliphatic alcohols that does not require the use of alkoxide bases is described. The reactions can be performed in neat alcohol. For more precious alcohols, the etherification was carried out in toluene as solvent using 2 equiv of alcohol. Additionally, the cross-coupling of an optically active benzylic alcohol with an unactivated aryl halide was demonstrated to proceed with complete retention of configuration. 相似文献