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  • 1995-1999  (5)
  • Polymer and Materials Science  (3)
  • decision trees  (2)
  • frontalin
  • 1
    Electronic Resource
    Electronic Resource
    Multivariate Decision Trees (1995)
    Springer
    Machine learning 19 (1995), S. 45-77 
    Details
    ISSN: 0885-6125
    Keywords: decision trees ; multivariate tests ; linear discriminant functions ; inductive learning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Unlike a univariate decision tree, a multivariate decision tree is not restricted to splits of the instance space that are orthogonal to the features' axes. This article addresses several issues for constructing multivariate decision trees: representing a multivariate test, including symbolic and numeric features, learning the coefficients of a multivariate test, selecting the features to include in a test, and pruning of multivariate decision trees. We present several new methods for forming multivariate decision trees and compare them with several well-known methods. We compare the different methods across a variety of learning tasks, in order to assess each method's ability to find concise, accurate decision trees. The results demonstrate that some multivariate methods are in general more effective than others (in the context of our experimental assumptions). In addition, the experiments confirm that allowing multivariate tests generally improves the accuracy of the resulting decision tree over a univariate tree.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022607123649
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Multivariate decision trees (1995)
    Springer
    Machine learning 19 (1995), S. 45-77 
    Details
    ISSN: 0885-6125
    Keywords: decision trees ; multivariate tests ; linear discriminant functions ; inductive learning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Unlike a univariate decision tree, a multivariate decision tree is not restricted to splits of the instance space that are orthogonal to the features' axes. This article addresses several issues for constructing multivariate decision trees: representing a multivariate test, including symbolic and numeric features, learning the coefficients of a multivariate test, selecting the features to include in a test, and pruning of multivariate decision trees. We present several new methods for forming multivariate decision trees and compare them with several well-known methods. We compare the different methods across a variety of learning tasks, in order to assess each method's ability to find concise, accurate decision trees. The results demonstrate that some multivariate methods are in general more effective than others (in the context of our experimental assumptions). In addition, the experiments confirm that allowing multivariate tests generally improves the accuracy of the resulting decision tree over a univariate tree.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994660
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Molecular mass control in methacrylic copolymer latexes containing glycidyl methacrylate (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 61 (1996), S. 9-19 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: Results are presented on the preparation and characterization of batch emulsion copolymers of butyl methacrylate and glycidyl methacrylate (GMA). The two main problems occurring during an emulsion copolymerization with GMA are partial hydrolysis of the epoxy groups and internal crosslinking of the latex particles formed. The influence of chain transfer agents (CTA) on the degree of crosslinking was investigated. Furthermore, the effect of reaction temperature and the addition of methacrylic acid on the sol/gel content of the polymer formed and on the rate of epoxy hydrolysis were investigated. It was found that lowering the reaction temperature did not increase the sol content; however, it significantly decreased the extent of hydrolysis. The addition of a CTA (especially CBr4) increased the sol content of the polymer, and good control over the molecular mass was achieved. The addition of methacrylic acid showed that this monomer can be used without any complications with respect to the control of the sol content of the polymer formed. © 1996 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Transparent flexible organic light-emitting devicesThe authors thank Universal Display Corp. and DARPA for their support of this work. (1997)
    Weinheim : Wiley-Blackwell
    Advanced Materials 9 (1997), S. 725-728 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    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
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19970090910
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Simulation of Energy Distribution for Scanning X-ray Probe (1997)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 25 (1997), S. 202-208 
    Details
    ISSN: 0142-2421
    Keywords: diffraction ; elliptical mirror ; energy distribution ; Fermi edge ; monochromator ; optical ray tracing ; rocking curve ; scanning x-ray probe ; simulation ; XPS ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The energy distribution of a scanning x-ray probe which is equipped with an elliptical mirror monochromator has been simulated with optical ray tracing, a numerically described energy distribution of Al Kα x-ray and a rocking curve. The rocking curve was estimated by dynamic diffraction theory with structure factors for quartz. The peak energy of the diffracted x-ray beam did not change with beam size, although the shapes of energy distribution were found to change slightly. Using the simulated x-ray energy distribution and the apparatus function, the energy width of the Fermi edge was simulated, which is to be compared with that obtained experimentally by monochromatic Al Kα x-ray excitation. The widths of the silver Fermi edge spectra were measured with different x-ray beam sizes. In addition, the relation between the x-ray beam position on the anode and the diffracted x-ray energy distribution was investigated. The peak energy of the diffracted x-ray beam was found to move with the x-ray beam position. It is shown that this kind of simulation can be effectively used for estimating the energy distribution and the intensity distribution of the diffracted x-ray beam. © 1997 by John Wiley & Sons, Ltd.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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