منابع مشابه
Opportunities abound: stay connected to healthcare initiatives.
I want to take this opportunity to wish everyone a pleasant and safe summer! In this issue of the journal, I’d like to give you an update on recent activities of the Academy of Canadian Executive Nurses, as well as other organizations supporting nursing leadership development. So often, nurses remain unaware of important national-level initiatives, for a variety of reasons. There are many websi...
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Receptor biologists have traditionally focused on receptors that are physiologically coupled to inductive responses such as gene expression, cytokinesis, secretion, or entry into the cell cycle. It has generally been assumed that such inductive responses were terminated by ligand decay or receptor desensitization, which lead to cessation of signaling. While such mechanisms are clearly operative...
متن کاملLearning When Negative Examples Abound
Existing concept learning systems can fail when the negative examples heavily outnumber the positive examples. The paper discusses one essential trouble brought about by imbalanced training sets and presents a learning algorithm addressing this issue. The experiments (with synthetic and real-world data) focus on 2-class problems with examples described with binary and continuous attributes.
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Many learning tasks, such as large-scale text categorization and word prediction, can benefit from efficient training and classification when the number of classes, in addition to instances and features, is large, that is, in the thousands and beyond. We investigate the learning of sparse class indices to address this challenge. An index is a mapping from features to classes. We compare the ind...
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ژورنال
عنوان ژورنال: ChemSusChem
سال: 2008
ISSN: 1864-5631,1864-564X
DOI: 10.1002/cssc.200800008