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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 69 (1986), S. 239-246 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The work considers the converter, which enables the measurement of the reactive power according to the Budeanu's definition [1], in the case of non-sinusoidal current and voltage. The converter is an development of the earlier author's work [12, 13]. The prinziple of the operation is presented. The structures of current and voltage input circuits are discussed. The frequency range of an acceptable frequency error of the conversion ratio has been checked. A particular chapter has been sacrificed to the accuracy of the measurement for the various shapes of the current and voltage. In addition, a hints for the practical designing of the converter are given.
    Notes: Übersicht Die Arbeit befaßt sich mit einem Umformer, der die Messung der Blindleistung nach Budeanu [1] bei nichtsinusoidalem Verlauf von Strom und Spannung ermöglicht. Es geht um eine Weiterentwicklung der früheren Ideen des Verfassers [12, 13]. Es werden die Grundlagen der Wirkungsweise des Umformers dargelegt. Weiter werden die Strukturen des Strompfades und des Spannungspfades, mit denen das gewählte Prinzip verwirklicht wird, besprochen. An Hand dieser Überlegungen wird der Frequenzbereich des Umformers und der Frequenzeinfluß auf die Wirkung des Umformers untersucht. Ein anderer Absatz ist der Genauigkeit der Messung bei verschiedenartigen verzerrten Strom-und Spannungsverläufen gewidmet. Zusätzlich werden auch einige technische Hinweise zur Verwirklichung des Umformers gegeben.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 70 (1987), S. 111-119 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The work considers the converter, which enables the measurement of the reactive power according to the Budeanu's definition [1], in the case of non-sinusoidal current and voltage. The converter is an development of the arlier author's work [15]. The structures of current and voltage input circuits are discussed. The frequency range of an acceptable frequency error of the conversion ratio has been checked. A particular chapter has been sacrificed to the accuracy of the measurement for the various shapes of the current and voltage. The new solution enables the construction of a converter with far more better accuracy then it has been obtainable.
    Notes: Übersicht Die Arbeit befaßt sich mit einem Umformer, der die Messung der Blindleistung nach Budeanu [1] beim nichtsinusoidalen Verlauf von Strom und Spannung ermöglicht. Es geht um eine Weiterentwicklung der früheren Lösung des Verfassers, die in [15] veröffentlicht worden ist. Es werden komplexere Strukturen des Strom- und Spannungspfades angegeben. Der Frequenzeinfluß und Frequenzbereich werden untersucht. Weiter werden die Grundlagen zur Berechnung solch eines Umformers abgeleitet. Ein besonderer Absatz ist der Genauigkeit der Messung bei verschiedenartigen verzerrten Formen des Stromes und der Spannung gewidmet. Die neue Lösung ermöglicht es, einen Umformer recht hoher Genauigkeit zu schaffen.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 71 (1988), S. 337-348 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The theoretical base of a particular sampling has been presented for the all possible variants. The best—from metrological point of view — variant is shown. The way of designing of the algorithm of the sampling is given. Introductory data of the obtainable accuracy are presented. The method bases on a particular choosing of the sampling moments is more applicable, flexible and fast than filters are.
    Notes: Übersicht Die dargelegte Methode beruht auf der Addition der Samplingsergebnisse, die in besonders gewählten Momenten erhalten worden sind. In der Arbeit ist das Grundprinzip der Methode erläutert. Die möglichen Varianten und ihre meßtechnischen Eigenschaften sind besprochen und verglichen worden. Weiter ist der Berechnungsgang des Ergebnisses erläutert. Ein besonderes Kapitel ist der Aufstellung des Samplingsprogrammes gewidmet. Vorläufige Bemerkungen über die erreichbare Genauigkeit sind angegeben. Die theoretische Untersuchung der Genauigkeitsfrage befindet sich in Vorbereitung.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 69 (1986), S. 227-238 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The known methods of measurement of the Budeanu's reactive power (when the current and voltage waves are distorted) can be divided into four groups. The theoretical principles of each group are presented. The main metrological properties are described. Basing on that, the important conclusions for the practical application and farther research work are given.
    Notes: Übersicht Die jetzt in der Literatur auftretenden Meßmethoden zur Bestimmung der Blindleistung nach Budeanu (bei verzerrten Strom- und Spannungskurven) können in vier Gruppen klassifiziert werden. Die theoretischen Grundlagen der Wirkungsweise aller dieser Gruppen werden dargestellt. Weiter werden ihre meßtechnischen Grundeigenschaften besprochen. Daraus lassen sich Schlußfolgerungen ziehen, die Anhaltspunkte für die Praxis wie auch für weitere Forschungsarbeiten bilden.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0942-0940
    Keywords: SAH ; cerebral angiopathy ; immunosuppression ; 2-chloro-2′-deoxyadenosine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We compared the morphology of the basilar artery walls in rabbits with experimental subarachnoid haemorrhage (SAH) without and with concomitant treatment with a novel immunosuppressive drug, 2-chloro-2′-deoxyadenosine (2 CdA). The treatment was successful in the prevention of the angiopathic changes, most likely due to its ability to inhibit lymphocyte activation in response to mitogenic signals. Since lymphocyte (and monocyte?) activation may play an important role in the development of the delayed neurological deficits in patients following SAH, the use of 2 CdA to prevent these deficits shall be considered.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 513 (May 2006), p. 69-74 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Selection of proper technological surface layer well resistant to cyclic external loadssuperposed onto residual stresses is presented in this paper, with a gear wheel taken as an example. The computer simulations of external loads were carried out by means of the FEM method (Finite Element Method) with the use of the ANSYS package. Residual stresses were measured by means of the Waisman-Philips and modified X-ray sin2Ψ method. The results of the stress superposition were verified experimental by with use of a circulating power stand. The applied low pressurenitiriding method NITROVAC demonstrated a high ability to increase the durability and reliability of the discussed toothed wheel in comparison with the convencional treatment applied so far
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters A 68 (1978), S. 80-82 
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Physics, Section A 120 (1968), S. 135-144 
    ISSN: 0375-9474
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Physics, Section A 111 (1968), S. 609-622 
    ISSN: 0375-9474
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters A 59 (1976), S. 59-61 
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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