Results 41 to 50 of about 6,523,303 (221)
Minimizing the condition number of a positive definite matrix by completion [PDF]
, 1994 Elsner L, He C, Mehrmann V. Minimizing the condition number of a positive definite matrix by completion. Numerische Mathematik. 1994;69(1):17-23.We consider the problem of minimizing the spectral condition number of a positive definite matrix by ...
Mehrmann, Volker +2 more
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PLoS ONE, 2014 BackgroundPeriostin was proved to play an important role in extra-cellular matrix remodeling after acute myocardial infarction (AMI). Myocardial periostin was markedly up-regulated after AMI and participated in the maladaptive process of cardiac ...
Lin Ling +3 more
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The Investigation of the Impact of the Social Capital Aspects on the Performance of Agricultural and Industrial Cooperatives in Boyer-Ahmad County [PDF]
جامعه شناسی کاربردی, 2017 Introduction Making over tenets and assessments of cooperation and its functions,the mutual relationship between development of cooperativesand various forms of assetsis understood.
Asghar Mirfardi +2 more
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Source Apportionment of One-Hour Semi-Continuous Data Using Positive Matrix Factorization with Total Mass (Nonvolatile plus Semi-Volatile) Measured by the R&P FDMS Monitor [PDF]
Aerosol Science and Technology, 2008 Positive matrix factorization (PMF) was used to elucidate sources of fine particulate material (PM 2.5 ) for a study conducted during July 2003 in Rubidoux, CA. One-h averaged semi-continuous measurements were made with a suite of instruments to provide PM 2.5 mass and chemical composition data.
Brett D. Grover, Delbert J. Eatough
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The LU-factorization of totally positive matrices [PDF]
, 1973 An n × n real matrix A is an STP (strictly totally positive) matrix if all its minors are strictly positive. An n × n real triangular matrix A is a ΔSTP matrix if all its nontrivial minors are strictly positive. It is proved that A is an STP matrix iff A
Colin W. Cryer, Cryer, Colin W.
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On Total Positivity of the Discrete Spline Collocation Matrix
Journal of Approximation Theory, 1996 \textit{R. Q. Jia} [J. Approximation Theory 39, 11-23 (1983; Zbl 0515.41010)] proved that the discrete B-spine collocation matrix is totally positive, and he also gave necessary and sufficient conditions for a minor to be strictly positive. By a counterexample, it is shown in this paper that Jia's necessary and sufficient conditions are not quite ...
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Tropical totally positive matrices
, 2018 arXiv:1606.00238International audienceWe investigate the tropical analogues of totally positive and totally nonnegative matrices. These arise when considering the images by the nonarchimedean valuation of the corresponding classes of matrices over a real
Niv, Adi, Gaubert, Stéphane
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Eigenvalue Localization for Symmetric Positive Toeplitz Matrices
AxiomsGiven a real symmetric matrix, several inclusion and exclusion intervals containing its eigenvalues can be given. In this paper, for symmetric positive Toeplitz matrices, we provide an inclusion interval and, under an additional hypothesis, we also give ...
Juan M. Peña
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Design and analysis strategies for robust microbiome ageing research
FEBS Letters, EarlyView.The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik +5 more
wiley +1 more source
Role of CX3CR1 receptor in monocyte/macrophage driven neovascularization.
PLoS ONE, 2013 Monocyte/macrophages are implicated in initiation of angiogenesis, tissue/organ perfusion and atherosclerosis biology. We recently showed that chemokine receptor CX(3)CR1 is an essential regulator of monocyte/macrophage derived smooth muscle cell ...
Arun H S Kumar +6 more
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