A New Concise and Exact Representation of Data Cubes

2012 ◽  
pp. 27-48 ◽  
Author(s):  
Hanen Brahmi ◽  
Tarek Hamrouni ◽  
Riadh Ben Messaoud ◽  
Sadok Ben Yahia
Keyword(s):  
Exact Representation ◽  
Data Cubes

Structuring and visualization of indicators in multidimensional data cubes

2018 ◽  
pp. 79-87
Author(s):  
E. E. Akimkina
Keyword(s):  
Decision Making ◽  
Data Processing ◽  
Data Management ◽  
Multidimensional Data ◽  
End User ◽  
Processing Technologies ◽  
Data Cubes ◽  
Multidimensional Visualization ◽  
Multidimensional Data Cubes ◽  
Practical Recommendations

The problems of structuring of indicators in multidimensional data cubes with their subsequent processing with the help of end-user tools providing multidimensional visualization and data management are analyzed; the possibilities of multidimensional data processing technologies for managing and supporting decision making at a design and technological enterprise are shown; practical recommendations on the use of domestic computer environments for the structuring and visualization of multidimensional data cubes are given.

scholarly journals Production of global daily seamless data cubes and quantification of global land cover change from 1985 to 2020 - iMap World 1.0

2021 ◽  
Vol 258 ◽  
pp. 112364
Author(s):  
Han Liu ◽  
Peng Gong ◽  
Jie Wang ◽  
Xi Wang ◽  
Grant Ning ◽  
...  
Keyword(s):  
Land Cover ◽  
Land Cover Change ◽  
Data Cubes ◽  
Global Land Cover ◽  
Global Land

A NOTE ON MUTH'S RATIONAL EXPECTATIONS HYPOTHESIS: A TIME-VARYING COEFFICIENT INTERPRETATION

2006 ◽  
Vol 10 (3) ◽  
pp. 415-425 ◽  
Author(s):  
P.A.V.B. SWAMY ◽  
GEORGE S. TAVLAS
Keyword(s):  
Rational Expectations ◽  
Econometric Model ◽  
Objective Probability ◽  
Varying Coefficient Models ◽  
Time Varying ◽  
Exact Representation ◽  
Expectations Hypothesis ◽  
Varying Coefficient ◽  
True Model ◽  
Necessary And Sufficient

Under certain interpretations of its coefficients, a specified econometric model is an exact representation of the “true” model, defining the “objective” probability distribution. This note enumerates these interpretations. In the absence of the conditions implied by these interpretations, the econometric model is misspecified. The note shows that model misspecifications prevent the satisfaction of a necessary and sufficient condition for individual expectations to be rational in Muth's sense. Whereas restrictive forms of econometric models can give very inaccurate predictions, this note describes the conditions under which the predictions generated from time-varying coefficient models coincide with the predictions generated from the relevant economic theory.

scholarly journals 2D–1D Wavelet Reconstruction as a Tool for Source Finding in Spectroscopic Imaging Surveys

2012 ◽  
Vol 29 (3) ◽  
pp. 244-250 ◽  
Author(s):  
L. Flöer ◽  
B. Winkel
Keyword(s):  
Image Enhancement ◽  
Image Denoising ◽  
Spectroscopic Data ◽  
Wavelet Decomposition ◽  
Spectroscopic Imaging ◽  
Basic Method ◽  
Spectral Dimension ◽  
Wavelet Coefficients ◽  
Data Cubes ◽  
Spatial Dimensions

AbstractToday, image denoising by thresholding of wavelet coefficients is a commonly used tool for 2D image enhancement. Since the data product of spectroscopic imaging surveys has two spatial dimensions and one spectral dimension, the techniques for denoising have to be adapted to this change in dimensionality. In this paper we will review the basic method of denoising data by thresholding wavelet coefficients and implement a 2D–1D wavelet decomposition to obtain an efficient way of denoising spectroscopic data cubes. We conduct different simulations to evaluate the usefulness of the algorithm as part of a source finding pipeline.

Range queries in dynamic OLAP data cubes

2000 ◽  
Vol 34 (1) ◽  
pp. 21-38 ◽  
Author(s):  
Weifa Liang ◽  
Hui Wang ◽  
Maria E. Orlowska
Keyword(s):  
Range Queries ◽  
Data Cubes

Spatial data cubes based on shared dimensions and neighbourhood relationship concepts

2021 ◽  
Vol 37 (3) ◽  
pp. 308
Author(s):  
Tarik De Melo e Silva Rocha ◽  
Rodrigo Rocha Silva ◽  
Tiago Garcia De Senna Carneiro ◽  
Joubert De Castro Lima
Keyword(s):  
Spatial Data ◽  
Data Cubes

scholarly journals XI. An account of observations on the great nebula in Orion, made at Birr Castle, with the 3-feet and 6-feet telescopes, between 1848 and 1867

1868 ◽  
Vol 16 ◽  
pp. 60-61
Keyword(s):  
Strong Evidence ◽  
Exact Representation

In this paper an account is given of the observations which have been made with the 3-feet and 6-feet telescopes on the great Nebula in Orion during the last eighteen years. The observations are accompanied by an elaborate drawing. In the year 1852, Mr. Bindon Stoney made a drawing of the Huygenian region; it was repeatedly compared with the nebula by several persons, and we believe therefore that it was quite accurate. It is not now an exact representation of the nebula as it exists, consequently there seems to he strong evidence of change.

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