منابع مشابه
Sharpening the LYM inequality
More detailed information about the s t ructure of Sperner families can be obtained by considering their level sequences. The level sequence of a family 4 , f ( ~ ) = {fi(Y)}, has f i (~) equal to the number of members of ~ with exac t ly ' / e l emen t s . Sperner 's theorem asserts tha t ~fi(2~)<_ ([~j) . A stronger restriction on the level i sequence was proved independent ly by Lubell, Yama...
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We explore the effective gain or loss in alpha from the point of view of the investor due to the volatility of a fund and its correlations to other asset classes. Fund managers and investors can be guided by this to increase the utility that is ultimately delivered to the investor. In this analysis of investor utility the Sharpe ratio is shown to be misleading and the tracking error has no role...
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Since Web 2.0, online content has become social. The popularization of Internet access added to the ease of producing online content have brought social communities to go online. This penetration of social assets in the modern internet has a wide impact, which naturally led computer scientists to analyze these online social networks. The promise of this research is for instance, from a network ...
متن کاملThe sharpening of microtome knives.
The regular production of a satisfactory edge on a microtome knife for the cutting of sections as thin as 2 u, which are free from scores and other blemishes, is a serious technical problem in histological laboratories. Eyen when a good edge is produced on a knife, its life is generally limited because contact with any hard material in the specimen may damage the delicate edge, causing it to sc...
متن کاملSharpening radiographs.
This article describes a method for clarifying and sharpening radiographs. The method uses convolution with a computed tomography reconstruction kernel and a noise elimination procedure to control the noise amplification of the convolution. The effect is to flatten global variations and to sharpen and magnify local variations. Examples from industry and medicine are included.
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ژورنال
عنوان ژورنال: Canadian Medical Association Journal
سال: 2006
ISSN: 0820-3946,1488-2329
DOI: 10.1503/cmaj.1041741