Results 21 to 30 of about 690,275 (266)
Principal component analysis in the spectral analysis of the dynamic laser speckle patterns [PDF]
Journal of the European Optical Society-Rapid Publications, 2014 Dynamic laser speckle is a phenomenon that interprets an optical patterns formed by illuminating a surface under changes with coherent light. Therefore, the dynamic change of the speckle patterns caused by biological material is known as biospeckle ...
Ribeiro K. M. +4 more
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Structural components in functional data. [PDF]
, 2009 Analyzing functional data often leads to finding common factors, for which functional principal component analysis proves to be a useful tool to summarize and characterize the random variation in a function space.
Gasser, T +8 more
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Principal components′ analysis of multifocal electroretinogram in retinitis pigmentosa
Indian Journal of Ophthalmology, 2011 Aims : To determine waveforms of multifocal electroretinogram (mfERG) in patients with retinitis pigmentosa (RP) contributing significantly to the overall retinal response by using principal components′ analysis.
Aniruddha Maiti +4 more
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Cilioretinal artery occlusion following intranasal cocaine insufflations
Indian Journal of Ophthalmology, 2011 Cocaine is used to produce a euphoric effect by abusers, who may be unaware of the devastating systemic and ocular side effects of this drug. We describe the first known case of cilioretinal artery occlusion after intranasal cocaine abuse.
Balaji Kannan +3 more
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A genealogical interpretation of principal components analysis. [PDF]
PLoS Genetics, 2009 Principal components analysis, PCA, is a statistical method commonly used in population genetics to identify structure in the distribution of genetic variation across geographical location and ethnic background. However, while the method is often used to
Gil McVean
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Dynamic Functional Principal Components for Testing Causality
Signals, 2021 In this paper, we investigate the causality in the sense of Granger for functional time series. The concept of causality for functional time series is defined, and a statistical procedure of testing the hypothesis of non-causality is proposed.
Matthieu Saumard, Bilal Hadjadji
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Bilateral multiple extraocular muscle metastasis from breast carcinoma
Indian Journal of Ophthalmology, 2011 We report a rare presentation of an initially misdiagnosed case of a pseudotumor, which on histopathology was diagnosed as bilateral breast metastases of lobular carcinoma involving multiple extraocular muscles. A 61-year-old lady presented with external
Ramesh Murthy +3 more
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Mean-Reverting 4/2 Principal Components Model. Financial Applications
Risks, 2021 In this paper, we propose a new multivariate mean-reverting model incorporating state-of-the art 4/2 stochastic volatility and a convenient principal component stochastic volatility (PCSV) decomposition for the stochastic covariance.
Marcos Escobar-Anel, Zhenxian Gong
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Evolving faces from principal components [PDF]
, 2000 A system that uses an underlying genetic algorithm to evolve faces in response to user selection is described. The descriptions of faces used by the system are derived from a statistical analysis of a set of faces.
Hancock, Peter J B, Peter J. B. Hancock
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Bilateral versus unilateral thyroid eye disease
Indian Journal of Ophthalmology, 2011 Aims: The aim of this study was to compare demographics, clinical manifestations, associated systemic and ocular factors, severity and activity of patients with unilateral thyroid eye disease (U-TED) versus bilateral thyroid eye disease (B-TED ...
Mohsen Bahmani Kashkouli +6 more
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