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Appropriate Modification (appropriate + modification)
Selected AbstractsInducing safer oblique trees without costsEXPERT SYSTEMS, Issue 4 2005Sunil Vadera Abstract: Decision tree induction has been widely studied and applied. In safety applications, such as determining whether a chemical process is safe or whether a person has a medical condition, the cost of misclassification in one of the classes is significantly higher than in the other class. Several authors have tackled this problem by developing cost-sensitive decision tree learning algorithms or have suggested ways of changing the distribution of training examples to bias the decision tree learning process so as to take account of costs. A prerequisite for applying such algorithms is the availability of costs of misclassification. Although this may be possible for some applications, obtaining reasonable estimates of costs of misclassification is not easy in the area of safety. This paper presents a new algorithm for applications where the cost of misclassifications cannot be quantified, although the cost of misclassification in one class is known to be significantly higher than in another class. The algorithm utilizes linear discriminant analysis to identify oblique relationships between continuous attributes and then carries out an appropriate modification to ensure that the resulting tree errs on the side of safety. The algorithm is evaluated with respect to one of the best known cost-sensitive algorithms (ICET), a well-known oblique decision tree algorithm (OC1) and an algorithm that utilizes robust linear programming. [source] A conceptual selenium management modelINTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT, Issue 3 2009Peter M Chapman Abstract We describe herein a conceptual selenium (Se) management model, directed toward coal mining in western Canada, but which can be applied to other coal mines and, with appropriate modification, to other industrial sources of Se to aquatic and terrestrial environments. This conceptual model provides a transparent means to integrate and synthesize existing information that can be used to provide an adaptive approach for managing ecological exposures and associated risk. It is particularly useful for visualizing and subsequently developing management interventions for Se control and risk reduction. The model provides a structured process by which critical information needs can be identified and addressed. It effectively provides the foundation for making management decisions related to Se discharges to aquatic and terrestrial environments by showing interrelationships of the various media and receptors as well as primary sources, release mechanisms, secondary sources, and exposure pathways. [source] Role of Hydrodynamically Active Biopolymeric Ingredients in Texture Modification and Physical Stabilization of Gel-based Composite FoodsJOURNAL OF FOOD SCIENCE, Issue 3 2002C.M. Lee ABSTRACT: Unlike synthetic polymer composites, a large amount of water is required for composite foods and needs to be managed by the use of water-binding (hydrodynamically active) biopolymeric ingredients for texture and physical stabilization. "Hydrodynamic properties" encompass the dynamics of water binding/retention and the distribution between particulates and the matrix, and are responsible for the composite effect. The extent of reinforcement depends on their hydrodynamic and surface properties, volume fraction, size, and shape. Moisture management and the control of texture and physical stability in gel-based composites can be achieved by understanding the interrelationships among the physical parameters governing matrix and dispersed particulates. Such understanding will facilitate the introduction of new composite products with improved texture and storability, as well as improve the functional properties of biopolymeric ingredients through appropriate modification of hydrodynamic properties. [source] Resolvent estimates in W,1,p related to strongly coupled-linear parabolic systems with coupled nonsmooth capacitiesMATHEMATICAL METHODS IN THE APPLIED SCIENCES, Issue 17 2007Annegret Glitzky Abstract We investigate linear parabolic systems with coupled nonsmooth capacities and mixed boundary conditions. We prove generalized resolvent estimates in W,1, p spaces. The method is an appropriate modification of a technique introduced by Agmon to obtain Lp estimates for resolvents of elliptic differential operators in the case of smooth boundary conditions. Moreover, we establish an existence and uniqueness result. Copyright © 2007 John Wiley & Sons, Ltd. [source] | ||||||||||