نتایج جستجو برای: mr bayes
تعداد نتایج: 83461 فیلتر نتایج به سال:
Nonparametric discriminant analysis methods are considered to segment brain multispectral MR images. Methods are based on i) a nonparametric estimate of voxel density functions by Kernel regression; ii) possibly a transform of the multispectral voxels into principal or independent components; iii) a classic Bayes 0-1 classification rule. Experiments are shown based on synthetic (brainweb) and r...
Based on a given Bayesian model of multivariate normal with known variance matrix we will find an empirical Bayes confidence interval for the mean vector components which have normal distribution. We will find this empirical Bayes confidence interval as a conditional form on ancillary statistic. In both cases (i.e. conditional and unconditional empirical Bayes confidence interval), the empiri...
background breast cancer (bc) is the most common cancer in iranian women. studying the mortality statistics is important to monitor the effects of screening programs or the influence of earlier diagnosis on the burden of this chronic disease. misclassification is still a problem in the iranian death registry data and about 20% of death statistics are recorded in misclassified categories. object...
This document updates the analysis of errors found in Tina Memo 2010-008. In particular we show that the errors presented there are exact for EML interpretations of parameter estimates, but only an approximation for conventional Likelihood. The work explains the error model used in Tina Memo 2000-007, for the analysis of distribution of cranial fluid as measured in a volumetric segmentation of ...
A two-factor experiment with interaction between factors wherein observations follow an Inverse Gaussian model is considered. Analysis of the experiment is approached via an empirical Bayes procedure. The conjugate family of prior distributions is considered. Bayes and empirical Bayes estimators are derived. Application of the procedure is illustrated on a data set, which has previously been an...
Supplementary figure legends Figure S1. Phylogeny demonstrating broad taxon representation for Sea2-Sea4. A topology generated by Mr Bayes and based on selected sequences from all four of the supergroups where these factors were recovered, is shown. Similar topologies were recovered with maximum likelihood methods (not shown). Sequence labels are color-coded as in Figure 4 for supergroup member...
A method for optimizing MR imaging pulse sequence parameters in a statistical framework is presented. Parameters are defined to be optimal when the resulting scalar images yield optimal image segmentations using Bayesian pixel classification. Thus, Bayes risk is used as the objective function to minimize. Approximations are made to give a tractable solution in a four-step procedure. A sample ca...
تیره asphodelaceae یا سریش واجد 14 جنس در دنیا می باشد. سه جنس اصلیeremurus m. b. asphodeline reichenb. و asphodelus l. به عنوان مشهورترین گیاهان موجود در این تیره، در ایران یافت می شوند. در رده بندی های مولکولی اخیر این تیره در راسته asparagales قرار می گیرد. در مطالعه حاضر فیلوژنی مولکولی تیره سریش (asphodelaceae)، برای 35 تاکسون، با استفاده از داده های توالی its nrdna و cpdnatrnl-f انجام شد....
Quantum states extended over a large volume in phase space have oscillations from quantum interferences in their Wigner distribution on scales smaller than variant Planck's over 2pi [W. H. Zurek, Nature (London) 412, 712 (2001)]]. We investigate the influence of those sub-Planck-scale structures on the sensitivity to an external perturbation of the state's time evolution. While we do find an ac...
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