منابع مشابه
Unsupervised Learning by Backward Inhibition
Backward inhibition in a two-layer connectionist network can be used as an alternative to, or an enhancement of, the competitive model for unsupervised learning. Two feature discovery algorithms based on backward inhibition are presented. It is shown that they are superior to the competitive feature discovery algorithm in feature independence and controllable grain. Moreover, the representation...
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This text is an informal review of several randomized algorithms that have appeared over the past two decades and have proved instrumental in extracting efficiently quantitative characteristics of very large data sets. The algorithms are by nature probabilistic and based on hashing. They exploit properties of simple discrete probabilistic models and their design is tightly coupled with their an...
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We consider the enumeration of multiderangements of a multiset n = {11 , 22 , . . . ,mm} by the number of excedances. We prove several properties, including the invariance under permutations of {n1, n2, . . . , nm}, the symmetry, recurrence relations, the real-rootedness, and a combinatorial expansion, of the generating function dn(x) of multiderangements by excedances, thus generalizing the co...
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Properties of the microtubule motor protein kinesin-1 have been well characterized in vitro but not in the viscous environment of a cell. By measuring the force that kinesin-1 exerts on lipid droplets in fly embryos, Shubeita et al. (2008) determine the number of active motors per droplet and find unexpected differences between motor regulation in vivo and in vitro.
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OBJECTIVES The aim of this study was to develop and validate a bedside test for executive function in patients with idiopathic normal pressure hydrocephalus (INPH). MATERIALS AND METHODS Twenty consecutive patients with INPH and 20 patients with Alzheimer's disease (AD) were enrolled in this study. We developed the counting-backward test for evaluating executive function in patients with INPH...
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ژورنال
عنوان ژورنال: The Annals of Family Medicine
سال: 2020
ISSN: 1544-1709,1544-1717
DOI: 10.1370/afm.2607