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  • 1985-1989  (2)
  • 1970-1974  (1)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Circuits, systems and signal processing 6 (1987), S. 449-456 
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The planar least-squares inverse (PLSI) polynomials are used for stabilization of two-dimensional unstable recursive filters. In order to obtain the PLSI polynomials, the main work involved consists in forming a set of linear equations and then solving them. In this paper we present an efficient and simple method to form the necessary set of linear equations (i.e., the required coefficient matrix) for a chosen pattern and order of the desired PLSI polynomial, starting from the denominator polynomial of a two-dimensional unstable recursive filter.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 56 (1974), S. 45-49 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents It is shown that for discontinuous and for periodically time-varying linear systems the question of asymptotic stability leads to a homonymous mathematical condition. Then two criteria are presented, both suited for a numerical treatment, by means of which an easy verification of this condition is possible.
    Notes: Übersicht Zunächst wird gezeigt, daß die Frage nach der asymptotischen Stabilität bei diskontinuierlich arbeitenden und bei periodisch zeitvarianten linearen Systemen auf eine gleichlautende mathematische Bedingung führt. Dann werden zwei für die numerische Anwendung gecignete Kriterien beschrieben, mit deren Hilfe diese Bedingung leicht überprüft werden kann.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 69 (1986), S. 255-260 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Bei der Behandlung verschiedener Probleme der Elektrotechnik ebenso wie in mehreren Bereichen der Mathematik treten tridiagonale oder Jacobische Matrizen auf. Über die Inversen derartiger Matrizen ist bislang wenig bekannt geworden. In der vorliegenden Arbeit werden die Inversen allgemeiner tridiagonaler Matrizen explizit dargestellt. Die benutzte Methode beruht wesentlich auf einer effizienten Anwendung der Cramerschen Regel, der Technik der Coateschen Flußgraphen und der Theorie der Kontinuanten. Die Methode eignet sich vorzüglich für die Programmierung und wird besonders wirksam bei der symbolischen Analyse elektrischer Netzwerke. Sie eignet sich auch für eine effiziente Implementierung auf einem Parallel-Computer. Empfindlichkeitsuntersuchungen und moderne Optimierungsverfahren, wie sie bei der iterativen Synthese von Netzwerken verwendet werden, erfordern häufig die Berechnung partieller Ableitungen. Das hier vorgeschlagene Verfahren erlaubt diese Berechnung auf analytische und zugleich bequeme Weise.
    Notes: Contents Tridiagonal or Jacobi matrices arise in several problems in electrical engineering as well as in different areas of mathematics. — However, there is little known on the inverses of such matrices. The explicit inverses of general tridiagonal matrices are presented in this paper. The method is based on an efficient implementation of Cramer's rule or Coate's flow graph technique and the theory of continuants. The technique is well suited to computer programming and is extremely efficient in symbolical analysis of electrical networks. It could also be efficiently implemented on a parallel computer. — Sensitivity studies or modern optimization techniques used in iterative network synthesis often require the computation of partial derivatives. The proposed technique permits these to be calculated analytically with great case.
    Type of Medium: Electronic Resource
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