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91.
L. Semichon M. Flanzy F. Ehrlich E. Schowalter J. Dubaqnié C. A. Grau G. Bonifazi J. Estalella Ch. Lagneau P. Balavoine A. Widmer Ph. Malvezin O. Reichard G. Filaudeau H. Boßelmann C. von der Heide W. Lohmann Duyk M. Klostermann K. Scholta A. Kickton R. Murdfield O. Korn und P. Berg 《Fresenius' Journal of Analytical Chemistry》1928,73(1-3):108-115
Ohne Zusammenfassung 相似文献
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94.
We interpret the existing experimental knowledge on τ decays in terms of the vector and axial vector couplings to the W boson, V τ and A τ . We deduce V τ = 1.00 ± 0.09 and A τ = 1.00±0.09 in agreement with the Standard Model predictions of 1. 相似文献
95.
O. Vogl L. S. Corley G. D. Jaycox W. J. Harris M. Malanga D. Lohmann 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(5-7):541-559
A number of new polymers have been studied. They include polymers obtained by chain reaction polymerization of olefins and epoxides with functional groups where the polymerizable group was separated from the functional group by an inert spacer group, the preparation of head-to-head polymers, and the preparation of optically active polymers based on the macromolecular asymmetry. 相似文献
96.
Frank Bachmann Jens Höpken Rachel Kohli Dieter Lohmann Josef Schneider 《Journal of carbohydrate chemistry》2013,32(9):1359-1375
Abstract A one-step synthesis for cyclodextrin methacrylate monomers was examined starting from α-, β- and γ-cyclodextrin. The reaction of 2-isocyanatoethyl methacrylate as well as allylisocyanate with the corresponding cyclodextrin gave the monofunctionalized carbamate-linked cyclodextrin methacrylates 2, 6 and 9 and allylcarbamates 11 and 14 in moderate yields. By NMR spectroscopic means, it could be proven that in all cases only the primary 6-hydroxyl groups of the cyclodextrins reacted with the isocyanate group. For the synthesis of a β-cyclodextrin monoallyl compound, a substitution reaction of purchasable 6-O-monotoluenesulfonyl-β-cyclodextrin with allylamine gave 6-N-allylamino-6-deoxy-β-cyclodextrin 18 in high yield. The reaction of 2-isocyanatoethyl methacrylate with α-cyclodextrin to the 6-O-carbamoyl-2-methylpropenoylethyl-α-cyclodextrin (2) was optimized so that the monomer 2 could be prepared on a larger scale without chromatographic separation. The aqueous radical homopolymerization of 2 with the peroxodisulfate/bisulfite redox initiator gave the water soluble cyclodextrin polymer 19 in good yield. Its molecular weight was determined by gel permeation chromatography to be Mn = 101,800 corresponding to an average degree of polymerization Pn = 90. 相似文献
97.
Jürgen Jahns 《中国光学快报(英文版)》2006,4(5)
The topic of this presentation is the utilization of time for optical information processing. As clock rates in computing and communication systems increase and reach the THz border, optical techniques for signal filtering, shaping and clock distribution become attractive. We discuss the use of optics in temporal processing and consider in particular diffractive solutions. In this paper, we describe the use of double diffraction for implementing an ultrafast tapped-delay line. 相似文献
98.
73Se was produced by proton irradiation of polycrystalline arsenic. The quadrupole interaction of the 66 keV, 5/2? state in the daughter isotope73As with the electric field gradient in the noncubic arsenic lattice was observed at room temperature by means of theγ-γ perturbed angular correlation technique. The measured angular correlation pattern is characterized by a quadrupole coupling constantv Q =51.6 (1.3) MHz. By use of the known electric field gradient on regular lattice sites, a value of ¦Q¦=0.356(12)b is derived for the quadrupole moment of the 66 keV, 5/2? state of73As. 相似文献
99.
A. Olmes S. Lohmann H. Lubatschowski W. Ertmer 《Applied physics. B, Lasers and optics》1997,64(6):677-682
Such measurements require a special consideration of the electric setup which substantially affects the interpretation of
the signals.
In this paper we analyze these considerations and derive an algorithm that permits the correction of measured pressure transients.
Received: 26 June 1996/Revised version: 30 October 1996 相似文献
100.
Model based method for estimating an attractor dimension from uni/multivariate chaotic time series with application to Bremen climatic dynamics 总被引:3,自引:0,他引:3
In this paper, a method for estimating an attractor embedding dimension based on polynomial models and its application in investigating the dimension of Bremen climatic dynamics are presented. The attractor embedding dimension provides the primary knowledge for analyzing the invariant characteristics of the attractor and determines the number of necessary variables to model the dynamics. Therefore, the optimality of this dimension has an important role in computational efforts, analysis of the Lyapunov exponents, and efficiency of modeling and prediction. The smoothness property of the reconstructed map implies that, there is no self-intersection in the reconstructed attractor. The method of this paper relies on testing this property by locally fitting a general polynomial autoregressive model to the given data and evaluating the normalized one step ahead prediction error. The corresponding algorithms are developed in uni/multivariate form and some probable advantages of using information from other time series are discussed. The effectiveness of the proposed method is shown by simulation results of its application to some well-known chaotic benchmark systems. Finally, the proposed methodology is applied to two major dynamic components of the climate data of the Bremen city to estimate the related minimum attractor embedding dimension. 相似文献