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  • 1970-1974  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    An extension of the theory of learning systems (1973)
    Springer
    Acta informatica 2 (1973), S. 357-381 
    Details
    ISSN: 1432-0525
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Summary The author's inquiry [1] on learning systems is generalized in the following respects: The process of learning, instead of coming to an end when the learning goal has been reached, is supposed to last for ever, so that the above “definitive” learning as well as phenomena such as forgetting, re-learning, changing the goal etc. become describable. We take over the notion of semi-uniform solvability of a set Γ of learning problems (2.2), but now (trivial cases excluded) the whole capacity of a learning system is never s. u. solvable. Finite such sets Γ are. The notion of a solving-basis of some Γ is introduced and we can state necessary conditions that Γ possess such a basis (2.14), so that examples of sets Γ without a basis can be provided. On the other hand, any s. u. solvable Γ has as basis. The notion of uniform solvability (3.1) reinforces that of s. u. solvability, and there are given sufficient conditions for Γ to be uniformly solvable (3.6). In some “finite cases”, s. u. solvability, existence of a basis and uniform solvability coincide (3.7–3.9). At last we give the construction for the weakest learning system solving a uniformly solvable problem set (3.12–3.19).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00289505
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Uber die Reaktion von Kaolin mit Alkalilaugen (1971)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 382 (1971), S. 209-216 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: From preheated kaoline hot alkali (Li, Na, K) hydroxide solutions dissolve first predominantly a part of the SiO2. This reacts on further digestion to form insoluble alkali aluminosilicates.
    Notes: Mit heißer Alkalilauge wird aus geglühtem Kaolin zunächst ein Teil des SiO2 gelöst, der sich nach einiger Zeit zu unlöslichen Alkalialumosilicaten umsetzt.
    Additional Material: 10 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19713820302
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    Paper (German National Licenses)
    Fulltext
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