منابع مشابه
Conjugateplane photometry: reducing scintillation in groundbased photometry
High-precision fast photometry from ground-based observatories is a challenge due to intensity fluctuations (scintillation) produced by the Earth’s atmosphere. Here we describe a method to reduce the effects of scintillation by a combination of pupil reconjugation and calibration using a comparison star. Because scintillation is produced by high-altitude turbulence, the range of angles over whi...
متن کاملGrowing Hierarchical Sectors on Sectors
Self-organizing maps are widely used in visual data mining. This paper proposes a new visualization approach for GHSOM algorithm, a hierarchical variant of SOM. The method is based on pie charts. That improves the visualization in hierarchical data structures making possible to extract all the existing relationships among the attributes of the neurons at any hierarchy level. The methodology is ...
متن کاملTests of a functional account of the Abney effect.
The Abney effect refers to changes in the hue of lights as they are desaturated. Normally the purity is varied by desaturating with a fixed spectrum. Mizokami et al. [J. Vis.6, 996 (2006)] instead varied purity by using Gaussian spectra and increasing their bandwidth. Under these conditions the hues of lights at short and medium wavelengths tended to remain constant and thus were tied to a fixed ...
متن کاملAbney CLD : Software for analysis of Anishinaabemowin texts and recordings
‘Rounding dissimilation’ is the name for a sound change in Miami-Illinois already seen in the late seventeenth century records of the language. Rounding dissimilation is a process whereby Proto-Algonquian *o (and sometimes *wa) changes to Miami-Illinois a in weak syllables preceding labials or Cw clusters. The effects of this rule have been disturbed by analogy and paradigmatic levelling, and e...
متن کاملBook Reviews: Semisupervised Learning for Computational Linguistics by Steven Abney
Semi-supervised learning is by no means an unfamiliar concept to natural language processing researchers. Labeled data has been used to improve unsupervised parameter estimation procedures such as the EM algorithm and its variants since the beginning of the statistical revolution in NLP (e.g., Pereira and Schabes 1992). Unlabeled data has also been used to improve supervised learning procedures...
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ژورنال
عنوان ژورنال: Nature
سال: 1924
ISSN: 0028-0836,1476-4687
DOI: 10.1038/114466a0