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  • Hurwitz polynomials  (2)
  • polyporales  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    A method for robust stabilization (1993)
    Springer
    Multidimensional systems and signal processing 4 (1993), S. 393-412 
    Details
    ISSN: 1573-0824
    Keywords: Hurwitz polynomials ; robust stabilization ; polytopes of perturbations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract LetP(y,M) be a family of polynomials, depending on a controller parameter vector y in ℝ n+1, defined as follows: a family of interval matrices, and y in ℝ n+1, set Given an initial stabilizing controller y0, this paper provides a simple method to robustify y0, i.e., to obtain a controller parameter vector y1 which is more robust than y0. Furthermore we define the stability factort for a given robustly stable controller y, which serves as a measure of the robustness of y.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00989652
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On the distance to the instability border of hurwitz polynomials with coefficients that depend affinely onm parameters and a particular convexity property ofH n (1992)
    Springer
    Multidimensional systems and signal processing 3 (1992), S. 45-61 
    Details
    ISSN: 1573-0824
    Keywords: Hurwitz polynomials ; convexity ofH n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Let $$a(y,s) = \sum\limits_{i = 0}^{n - 1} {a_i s^i + s^n ,} $$ where the coefficientsa i =a i (y 1, ...,y m ) depend affinely onm parameters. IfP is the zone of Hurwitz parameters, a formula is obtained to compute the distance of a pointy′ εP to the boundary ∂P. Furthermore, in the particular casem=1 it is proved that, if a line through the origin intersects the Hurwitz zone, the intersection will be either a finite interval or a half line. Necessary and sufficient conditions are given for the occurrence of each of these alternatives.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941017
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  • 3
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    Morphological reassessment and molecular phylogenetic analyses of Amauroderma s.lat. raised new perspectives in the generic classification of the Ganodermataceae family (2017)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi (1878-9080) vol.39 (2017) p.254
    Details
    Publication Date: 2017-09-26
    Description: Ganodermataceae is a remarkable group of polypore fungi, mainly characterized by particular doublewalled basidiospores with a coloured endosporium ornamented with columns or crests, and a hyaline smooth exosporium. In order to establish an integrative morphological and molecular phylogenetic approach to clarify relationship of Neotropical Amauroderma s.lat. within the Ganodermataceae family, morphological analyses, including scanning electron microscopy, as well as a molecular phylogenetic approach based on one (ITS) and four loci (ITS-5.8S, LSU, TEF-1α and RPB1), were carried out. Ultrastructural analyses raised up a new character for Ganodermataceae systematics, i.e., the presence of perforation in the exosporium with holes that are connected with hollow columns of the endosporium. This character is considered as a synapomorphy in Foraminispora, a new genus proposed here to accommodate Porothelium rugosum (≡ Amauroderma sprucei). Furtadoa is proposed to accommodate species with monomitic context: F. biseptata, F. brasiliensis and F. corneri. Molecular phylogenetic analyses confirm that both genera grouped as strongly supported distinct lineages out of the Amauroderma s.str. clade.
    Keywords: Amauroderma ; Ganoderma ; polyporales ; systematics ; ultrastructure
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
    Format: application/pdf
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  • 4
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    Morphological reassessment and molecular phylogenetic analyses of Amauroderma s.lat. raised new perspectives in the generic classification of the Ganodermataceae family (2017)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 39, pp. 254-269
    Details
    Publication Date: 2024-01-12
    Description: Ganodermataceae is a remarkable group of polypore fungi, mainly characterized by particular doublewalled basidiospores with a coloured endosporium ornamented with columns or crests, and a hyaline smooth exosporium. In order to establish an integrative morphological and molecular phylogenetic approach to clarify relationship of Neotropical Amauroderma s.lat. within the Ganodermataceae family, morphological analyses, including scanning electron microscopy, as well as a molecular phylogenetic approach based on one (ITS) and four loci (ITS-5.8S, LSU, TEF-1\xce\xb1 and RPB1), were carried out. Ultrastructural analyses raised up a new character for Ganodermataceae systematics, i.e., the presence of perforation in the exosporium with holes that are connected with hollow columns of the endosporium. This character is considered as a synapomorphy in Foraminispora, a new genus proposed here to accommodate Porothelium rugosum (\xe2\x89\xa1 Amauroderma sprucei). Furtadoa is proposed to accommodate species with monomitic context: F. biseptata, F. brasiliensis and F. corneri. Molecular phylogenetic analyses \nconfirm that both genera grouped as strongly supported distinct lineages out of the Amauroderma s.str. clade.
    Keywords: Amauroderma ; Ganoderma ; polyporales ; systematics ; ultrastructure
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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