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  • rotifers  (3)
  • Variable-metric methods  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Some rotifers from coastal lakes of Brazil, with description of a new rotifer, Lepadella (Xenolepadella) curvicaudata n. sp. (1990)
    Springer
    Hydrobiologia 208 (1990), S. 141-152 
    Details
    ISSN: 1573-5117
    Schlagwort(e): rotifers ; Brazil ; coastal lakes ; neotropical ; distribution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Four relatively rare, two common rotifers and one rotifer new to science are described from some coastal lakes near Rio de Janeiro, Brazil. Each rotifer is described in detail, and several are accompanied by illustrations and mensuration data. Geographic distribution and individual habitats of the rotifers are also discussed. Several species show a larger geographic distribution than previously known.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00007780
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  • 2
    Digitale Medien
    Digitale Medien
    Some rotifers from Republic of Korea (1986)
    Springer
    Hydrobiologia 137 (1986), S. 3-7 
    Details
    ISSN: 1573-5117
    Schlagwort(e): rotifers ; geographic distribution ; Republic of Korea
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The author gives account of rotifers found at ten locations in the Republic of Korea, and elaborates some detail of specimens encountered with remarks and drawings. Thirty-seven different rotifer species were found, mostly belonging to the Order Monogononta. Twenty-two are new to the species list compiled by Yamamoto (1953). Keratella hiemalis was found for the first time in Asia. To date, one-hundred and two species of rotifers have been found in Korea.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00004166
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  • 3
    Digitale Medien
    Digitale Medien
    A new rotifer from a coastal lake in Southeastern Brazil: Hexarthra longicornicula n. sp. (1987)
    Springer
    Hydrobiologia 153 (1987), S. 169-174 
    Details
    ISSN: 1573-5117
    Schlagwort(e): rotifers ; taxonomy ; new species ; Neotropis ; Brazil
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A new rotifer is described from among samples taken from coastal lakes in southeastern Brazil. Comparisons to related rotifers are made. This new animal belongs to the Hexarthra mira-intermedia species group by way of its general morphological configuration, the number of teeth in the trophi (5), and the two club-shaped caudal appendages (CSCA's). An extremely long dorsal antenna and very long setae extending from the bend in the ventro-lateral arm characterize this animal's speciation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00006648
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  • 4
    Digitale Medien
    Digitale Medien
    Direct-prediction quasi-Newton methods in Hilbert space with applications to control problems (1977)
    Springer
    Journal of optimization theory and applications 21 (1977), S. 199-211 
    Details
    ISSN: 1573-2878
    Schlagwort(e): Variable-metric methods ; optimization theorems ; Hilbert spaces ; control theory
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract In this paper, the Hilbert-space analogue of a result of Huang, that all the methods in the Huang class generate the same sequence of points when applied to a quadratic functional with exact linear searches, is established. The convergence of a class of direct prediction methods based on some work of Dixon is then proved, and these methods are then applied to some control problems. Their performance is found to be comparable with methods involving exact linear searches.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00932520
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  • 5
    Digitale Medien
    Digitale Medien
    Direct prediction methods in Hilbert space with applications to control problems (1977)
    Springer
    Journal of optimization theory and applications 22 (1977), S. 399-415 
    Details
    ISSN: 1573-2878
    Schlagwort(e): Variable-metric methods ; optimization theorems ; Hilbert spaces ; control theory
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract In this paper, the convergence of variable-metric methods without line searches (direct prediction methods) applied to quadratic functionals on a Hilbert space is established. The methods are then applied to certain control problems with both free endpoints and fixed endpoints. Computational results are reported and compared with earlier results. The methods discussed here are found to compare favorably with earlier methods involving line searches and with other direct prediction quasi-Newton methods.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00932863
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