Results 41 to 50 of about 505,956 (309)

On estimation of the diagonal elements of a sparse precision matrix

, 2016
In this paper, we present several estimators of the diagonal elements of the inverse of the covariance matrix, called precision matrix, of a sample of iid random vectors. The focus is on high dimensional vectors having a sparse precision matrix.
Balmand, Samuel, Dalalyan, Arnak S.
core   +1 more source

Avoiding bias in reconstructing the largest observable scales from partial-sky data

, 2011
Obscuration due to Galactic emission complicates the extraction of information from cosmological surveys, and requires some combination of the (typically imperfect) modeling and subtraction of foregrounds, or the removal of part of the sky.
Andrew Pontzen, Hiranya V. Peiris, N. Wiener, Stephen M. Feeney   +3 more
core   +1 more source

MADAM - a map-making method for CMB experiments [PDF]

, 2004
We present a new map-making method for cosmic microwave background (CMB) measurements. The method is based on the destriping technique, but it also utilizes information about the noise spectrum.
Keihänen, Elina, Kurki-Suonio, Hannu, Poutanen, Torsti   +2 more
core   +3 more sources

Discrete Exponentiated Generalized Family of Distributions

Computational Journal of Mathematical and Statistical Sciences, 2023
In this paper, exponentiated-G family of distributions is constructed as a new family of discrete distribution, using the general approach of discretization of a continuous distribution. Some statistical properties including quantiles, mean residual life,
Abeer E. Abd EL-Hady, Mai A. Hegazy, Abeer A. EL-Helbawy   +2 more
doaj   +1 more source

Luby Transform Coding Aided Iterative Detection for Downlink SDMA Systems

, 2007
A Luby Transform (LT) coded downlink Spatial Division Multiple Access (SDMA) system using iterative detection is proposed, which invokes a low-complexity near-Maximum-Likelihood (ML) Sphere Decoder (SD).
Akhtman, J., Hanzo, L, Nguyen Dang, T, Wei, C-Y, Wu, N, Yang, L-L   +5 more
core   +1 more source

A new extension of inverse length biased exponential model with statistical inference under joint censored samples and application

Alexandria Engineering Journal
In this paper, we introduce a new two-parameter lifetime distribution based on the type II Topp-Leone-G family and the inverse length biased exponential distribution which is called the type II Topp-Leone inverse length biased exponential (TIITL-ILBE ...
Mahmoud M. Abdelwahab, Ibrahim Elbatal, Mohammed Elgarhy, Anis Ben Ghorbal, H.E. Semary, Ehab M. Almetwally   +5 more
doaj   +1 more source

The Half-Logistic Lomax Distribution for Lifetime Modeling

Journal of Probability and Statistics, 2018
We introduce a new two-parameter lifetime distribution called the half-logistic Lomax (HLL) distribution. The proposed distribution is obtained by compounding half-logistic and Lomax distributions.
Masood Anwar, Jawaria Zahoor
doaj   +1 more source

Reliability analysis of the triple modular redundancy system under step-partially accelerated life tests using Lomax distribution

Scientific Reports, 2023
Triple modular redundancy (TMR) is a robust technique utilized in safety-critical applications to enhance fault-tolerance and reliability. This article focuses on estimating the distribution parameters of a TMR system under step-stress partially ...
Laila A. Al-Essa, Alaa H. Abdel-Hamid, Tmader Alballa, Atef F. Hashem   +3 more
doaj   +1 more source

A New Three Parameter Lifetime Model: The Complementary Poisson Generalized Half Logistic Distribution

IEEE Access, 2021
We propose a new model with flexible failure rate called complementary Poisson generalized half logistic (CPGHL). Various properties of the model are explored and examine numerically such as the explicit expressions of the moments, mean deviations ...
Mustapha Muhammad, Lixia Liu
doaj   +1 more source

NRASQ61R Expression in Lymphatic Endothelial Cells Causes Enlarged Vessels, Hemorrhagic Chylous Effusions, and High Mortality in a Mouse Model of Kaposiform Lymphangiomatosis

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Kaposiform lymphangiomatosis (KLA) is an aggressive complex lymphatic anomaly. Patients exhibit malformed lymphatic vessels and often develop hemorrhagic effusions and elevated angiopoietin‐2 (Ang‐2) levels. A somatic NRAS p.Q61R (NRASQ61R) mutation has been associated with KLA.
C. Griffin McDaniel, Patricia Pastura, Joshua P. Scallan, Timothy D. Le Cras   +3 more
wiley   +1 more source