Results 51 to 60 of about 241,357 (270)
Deblurring, artifact-free optical coherence tomography with deconvolution-random phase modulation
Opto-Electronic ScienceDeconvolution is a commonly employed technique for enhancing image quality in optical imaging methods. Unfortunately, its application in optical coherence tomography (OCT) is often hindered by sensitivity to noise, which leads to additive ringing ...
Xin Ge +6 more
doaj +1 more source
Application of the nanoindentation technique for the characterization of varved clay
Open Geosciences, 2018 Nanoindentation is a test carried out in a small scale, during which a rigid indenter (of known hardness and geometry) is pressed into the tested material.
Tankiewicz Matylda
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Impulse Feature Extraction of Bearing Faults Based on Convolutive Nonnegative Matrix Factorization
IEEE Access, 2020 The detection of bearing faults is of great significance for the stable operation of rotating machinery. Apart from detection by analysing the vibration response, another powerful strategy is to extract the periodic impulse excitation directly induced by
Lin Liang +5 more
doaj +1 more source
, 2007 Given samples (x_1,...,x_m) and (z_1,...,z_n) which we believe are independent realizations of random variables X and Z respectively, where we further believe that Z=X+Y with Y independent of X, the problem is to estimate the distribution of Y.
Mallows, Colin
core +1 more source
Deconvolution for an atomic distribution [PDF]
, 2008 Let $X_1,...,X_n$ be i.i.d. observations, where $X_i=Y_i+\sigma Z_i$ and $Y_i$ and $Z_i$ are independent. Assume that unobservable $Y$'s are distributed as a random variable $UV,$ where $U$ and $V$ are independent, $U$ has a Bernoulli distribution with ...
Gugushvili, Shota +2 more
core +4 more sources
Bivariate uniform deconvolution [PDF]
Statistics, 2015 We construct a density estimator in the bivariate uniform deconvolution model. For this model we derive four inversion formulas to express the bivariate density that we want to estimate in terms of the bivariate density of the observations. By substituting a kernel density estimator of the density of the observations we then get four different ...
Benešová, M., van Es, B., Tegelaar, P.
openaire +4 more sources
Correlation of the differential expression of PIK3R1 and its spliced variant, p55α, in pan‐cancer
Molecular Oncology, EarlyView.PIK3R1 undergoes alternative splicing to generate the isoforms, p85α and p55α. By combining large patient datasets with laboratory experiments, we show that PIK3R1 spliced variants shape cancer behavior. While tumors lose the protective p85α isoform, p55α is overexpressed, changes linked to poorer survival and more pronounced in African American ...
Ishita Gupta +10 more
wiley +1 more source
Determination of EPID convolution kernels for portal imaging using carbon target bremsstrahlung
Current Directions in Biomedical Engineering, 2017 Improving the accuracy and reproducibility during patient positioning is of paramount importance. Hence, the goal of this work is to characterize the aspects of image blurring occurring during carbon target bremsstrahlung portal imaging and to assess the
Lüdeke Sascha +5 more
doaj +1 more source
Random action of compact Lie groups and minimax estimation of a mean pattern [PDF]
, 2011 This paper considers the problem of estimating a mean pattern in the setting of Grenander's pattern theory. Shape variability in a data set of curves or images is modeled by the random action of elements in a compact Lie group on an infinite dimensional ...
Bigot, Jérémie +2 more
core +6 more sources
Molecular Oncology, EarlyView.Meta‐transcriptome analysis identified FGF19 as a peptide enteroendocrine hormone associated with colorectal cancer prognosis. In vivo xenograft models showed release of FGF19 into the blood at levels that correlated with tumor volumes. Tumoral‐FGF19 altered murine liver metabolism through FGFR4, thereby reducing bile acid synthesis and increasing ...
Jordan M. Beardsley +5 more
wiley +1 more source