Butter, Speisefette und ?le

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Beitr?ge zur Kenntnis und Beurteilung der Obst- und Beerenweine besonders des Apfelweins

Ohne ZusammenfassungMitteilung aus dem Chemischen Laboratorium der Kgl. Auslandsfleischbeschaustelle Frankfurt a. M.     

Literatur

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Verein Deutscher Nahrungsmittelchemiker

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Forense Chemie

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Mehl und Backwaaren

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Verteilung der N?hrstoffe im Tabak

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Buchbesprechungen

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Averaging of nonsmooth systems using dither

It was shown by Zames and Shneydor and later by Mossaheb that a high-frequency dither signal of a quite arbitrary shape can be used to narrow the effective nonlinear sector of Lipschitz continuous feedback systems. In this paper, it is shown that also discontinuous nonlinearities of feedback systems can be narrowed using dither, as long as the amplitude distribution function of the dither is absolutely continuous and has bounded derivative. The averaged system is proven to approximate the dithered system with an error of the order of dither period.     

Quantum chemical SINDO1 study of vanadium pentoxide

An improved set of parameters for vanadium in the semiempirical quantum chemical SCF MO method SINDO1 is presented. It is shown that both the geometries and heats of formation of a number of vanadium-containing compounds calculated by this method are in good agreement with available experimental data. Model clusters of increasing size are used for the study of geometric and energetic properties of vanadium pentoxide. Both hydrogen atom and proton adsorption on the (010) surface of vanadium pentoxide and a subsequent formation of different oxygen vacancies have been investigated. Based on these computational results the reactivities of V₂O₅-surface oxygen atoms for adsorption are discussed.