Correlation matrix

The EViews workfile is defined as a file in EViews, which provides many convenient visual ways, such as (i) to enter and save data sets, (ii) to create new series or variables from existing ones, (iii) to display and print series and (iv) to carry out and save results of statistical analysis, aswell as each equation of the models applied in the analysis.By using EViews, each statistical model that applied previously could be recalled and modified easily and quickly to obtain the best fit model, based on personal judgment using an interactive process.
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Over the last two decades there has been a notable increase in the number of corporate governance codes and principles, as well as a range of improvements in structures and mechanisms. Despite this, corporate governance failed to prevent a widespread default of fiduciary duties of corporate boards and managerial responsibilities in the finance industry, which contributed to the 2007–2010 global financial crisis.
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We study unitary random matrix ensembles of the form −1 Zn,N  det M 2α e−N Tr V (M ) dM, where α −1/2 and V is such that the limiting mean eigenvalue density for n, N → ∞ and n/N → 1 vanishes quadratically at the origin. In order to compute the double scaling limits of the eigenvalue correlation kernel near the origin, we use the Deift/Zhou steepest descent method applied to the RiemannHilbert problem for orthogonal polynomials on the real line with respect to the weight x2α e−N V (x) . ...
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Most high resolution directionofarrival (DOA) estimation methods rely on subspace or eigenbased information which can be obtained fromthe eigenvalue decomposition (EVD) of an estimated correlation matrix, or from the singular value decomposition (SVD) of the corresponding data matrix.
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Most high resolution directionofarrival (DOA) estimation methods rely on subspace or eigenbased information which can be obtained fromthe eigenvalue decomposition (EVD) of an estimated correlation matrix, or from the singular value decomposition (SVD) of the corresponding data matrix. However, the expense of directly computing these decompositions is usually prohibitive for realtime processing. Also, because theDOAangles are typically timevarying, repeatedcomputation is necessarytotracktheangles.
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The SMI algorithm, which is also known as direct matrix inversion (DMI) algorithm, has recently been used for 3G systems and beyond, because the fast convergence property makes it suitable for use with high data rate transmissions [143,150]. However the complexity grows threeorders exponentially with the number of the weights (M 3). Recursive equations for the inverse of the correlation matrix thus had been used for the implementation on digital signal processors.
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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article MatrixVariate Probabilistic Model for Canonical Correlation Analysis
7p sting05 09022012 18 4 Download

Beginning with Titman and Wessels (1988), then Rajan and Zingales (1995) and more recently Frank and Goyal (2004), the empirical corporate finance literature has converged to a limited set of variables that are reliably related to the leverage of nonfinancial firms. Leverage is positively correlated with size and collateral, and is negatively correlated with profits, markettobook ratio and dividends.
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Despite evidence to the contrary, chemical industry critics of epidemiologic studies linking pesticides to major diseases argue that they are of limited value because of their reliance on records and study participants’ memory, among other issues. In fact, the correlation of patterns of chemical use with an effect is difficult to establish in epidemiology and therefore may underestimate hazard effects. When a correlation is established it raises serious concern.
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Hopke and coworkers (6), Heidam (7), Henry (8), and Barrie and Barrie (9) applied principal component analysis (PCA) to source identification, but Paatero and Tapper (10, 11) showed that PCA cannot provide a trueminimal variance solution since they are based on an incorrect weighting. In view of the limitations of PCA, a new technique, positive matrix factorization (PMF), was developed for sources identification and apportionment (12).
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ICA by Tensorial Methods One approach for estimation of independent component analysis (ICA) consists of using higherorder cumulant tensor. Tensors can be considered as generalization of matrices, or linear operators. Cumulant tensors are then generalizations of the covariance matrix. The covariance matrix is the secondorder cumulant tensor, and the fourth order tensor is deﬁned by the fourthorder cumulants cum(xi xj xk xl ). For an introduction to cumulants, see Section 2.7.
9p khinhkha 29072010 45 4 Download

Muirhead (1987) reviews the large literature on shrinkage estimators of the covariance matrix in ﬁnitesample statistical decision theory. All these estimators suﬀer from at least two severe drawbacks, either of which is enough to make them illsuited to stock returns: (i) they break down when N T; (ii) they do not exploit the a priori knowledge that stock returns tend to be positively correlated to one another.
9p quaivattim 04122012 31 3 Download

We report on an investigation of the pragmatic category of topic in Danish dialog and its correlation to surface features of NPs. Using a corpus of 444 utterances, we trained a decision tree system on 16 features. The system achieved nearhuman performance with success rates of 84–89% and F 1 scores of 0.63–0.72 in 10fold cross validation tests (human performance: 89% and 0.78). The most important features turned out to be preverbal position, deﬁniteness, pronominalisation, and nonsubordination. We discovered that NPs in epistemic matrix clauses (e.g. “I think . . .
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Heparanase is an endobDglucuronidase capable of cleaving heparan sulfate side chains at a limited number of sites, yielding heparan sulfate fragments of still appreciable size. Importantly, heparanase activity correlates with the metastatic potential of tumorderived cells, attributed to enhanced cell dissemination as a consequence of heparan sulfate cleavage and remodeling of the extracellular matrix and basement membrane underlying epithelial and endothelial cells.
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