منابع مشابه
A Statistical Method for Estimating the Usefulness of Text Databases
We are grateful to Luis Gravano and Hector Garcia-Molina of Stanford University for providing us with the database and query collections used in 6]. (This report discussed how to estimate the database usefulness used deened in this paper for the high-correlation and disjoint scenarios. Such discussion did not appear in 6].)
متن کاملA Statistical Method for Estimating Luminosity Functions using Truncated Data
The observational limitations of astronomical surveys lead to significant statistical inference challenges. One such challenge is the estimation of luminosity functions given redshift (z) and absolute magnitude (M) measurements from an irregularly truncated sample of objects. This is a bivariate density estimation problem; we develop here a statistically rigorous method which (1) does not assum...
متن کاملComparison of physical and statistical methods for estimating probable maximum precipitation in southwestern basins of Iran
The probable maximum precipitation (PMP) is the greatest depth of precipitation for a given duration that is physically possible over a given size storm area at a particular geographical location at a certain time of the year. In this study a physically based method was compared with a statistical procedure to calculate PMP in the southwest arid regions of Iran. In order to estimate PMP using a...
متن کاملEstimating statistical significance of sequence alignments.
Algorithms that compare two proteins or DNA sequences and produce an alignment of the best matching segments are widely used in molecular biology. These algorithms produce scores that when comparing random sequences of length n grow proportional to n or to log(n) depending on the algorithm parameters. The Azuma-Hoeffding inequality gives an upper bound on the probability of large deviations of ...
متن کاملA New Statistical Method of Estimating Surface Radiances from Corresponding Satellite Window-channel Radiances
Stepwisc linear rcgressions for the specification of blackbody surface radiances are computed using a set of 103 model atmospheres chosen originally by Wark et al. and the corresponding simulated values of Nimbus 2 windowchannel (10-11 p) radiances. Two stratifications arc considered: (a) precipitable water vapor, u > l , and (b) u < l gm cm-2. For each of five zenith angles considered, signifi...
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ژورنال
عنوان ژورنال: Papers in Meteorology and Geophysics
سال: 1952
ISSN: 0031-126X
DOI: 10.2467/mripapers1950.3.2_77