Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • radiation damage  (2)
  • Chemical Engineering  (1)
  • Schlüsselwörter: Zweidimensionales Zuschneideproblem – Nesting-Problem – Unregelmässige Objekte – Heuristiken – Konstruktionsverfahren  (1)
  • anti-hypertensive drugs  (1)
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Radiation Physics and Chemistry 41 (1993), S. 185-193 
    ISSN: 0969-806X
    Keywords: Low dose rate ; radiation damage ; recovery ; scintillating plastic fibres
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Radiation Physics and Chemistry 41 (1993), S. 221-224 
    ISSN: 0969-806X
    Keywords: Decay time ; plastic scintillating fibres ; radiation damage
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    OR spectrum 22 (2000), S. 263-284 
    ISSN: 1436-6304
    Keywords: Key words:Cutting and packing – Nesting – Constructive heuristics ; Schlüsselwörter: Zweidimensionales Zuschneideproblem – Nesting-Problem – Unregelmässige Objekte – Heuristiken – Konstruktionsverfahren
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung. In dem vorliegenden Beitrag entwickeln die Autoren ein neues Konstruktionsverfahren für das „Nesting-Problem”, d.h. für ein zweidimensionales Zuschneideproblem mit unregelmäßigen Objekten. Das Schnittmuster wird dadurch gebildet, dass sukzessive zuzuschneidende Objekte (Teile) einer Teillösung angegliedert und damit neue Teillösungen gebildet werden. Verschiedene Kriterien zur Auswahl des jeweils anzuordnenden Teils und seiner Orientierung werden vorgestellt. Außerdem werden verschiedene Zielfunktionen zur Bewertung der Teillösungen herangezogen. Insgesamt ergeben sich so 126 Varianten des Konstruktionsverfahrens, die systematisch anhand von Datensätzen aus der Literatur getestet werden. Für einige Testprobleme stellt das neue Verfahren Lösungen bereit, die besser sind als die besten bisher in der Literatur beschriebenen Lösungen.
    Notes: Abstract. In this paper we present a new constructive algorithm for nesting problems. The layout is built by successively adding a new piece to a partial solution, i.e. to the set of pieces previously nested. Several criteria to choose the next piece to place and its orientation are proposed and tested. Different objective functions are also proposed to evaluate and compare partial solutions. A total of 126 variants of the algorithm, generated by the complete set of combinations of criteria and objective functions, are computationally tested. The computational experiments are based on data sets published in the literature or provided by other authors. In some cases this new algorithm generates better solutions than the best known (published) solutions.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 59 (2000), S. 657-661 
    ISSN: 1572-8943
    Keywords: anti-hypertensive drugs ; quality control ; thermal analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The present work reports studies of the thermal behaviour of some anti-hypertensive drugs. Their purities were determined by DSC and specialized pharmacopeial methods. The activation energy values suggest the following sequence of satability: nifedipine〉propanolol hydrochloride〉captoril. Analysis of the DSC data indicated that the degrees of purity of nifedipine, captopril and propanolol hydrochloride were similar to those found by pharmacopeial methods BP 93 and USP 23. The simplicity, speed and low operational costs of thermal analysis justify its application in the quality control of pharmaceutical drugs.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 21 (1981), S. 745-747 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Glassy crosslinked networks were prepared by copolymerization of methyl methacrylate with up to 5.2 mole-percent of ethylene and triethylene dimethacrylates. The moduli of these materials were measured by tensile and two dynamics methods: forced resonance vibration and ultrasonic. Impact strength were measured using the Izod geometry and Sharpy notched samples to induce brittle fracture. The increase in the length of the crosslinking agent caused an increse in the deformability and impact strength of these materials without any effects in the moduli.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...