Results 51 to 60 of about 296,448 (209)

Performance analysis of beamformers using generalized loading of the covariance matrix in the presence of random steering vector errors [PDF]

open access: yes, 2005
Robust adaptive beamforming is a key issue in array applications where there exist uncertainties about the steering vector of interest. Diagonal loading is one of the most popular techniques to improve robustness.
Besson, Olivier, Vincent, François
core   +1 more source

Numerical Covariance Evaluation for Linear Structures Subject to Non-Stationary Random Inputs

open access: yesComputation
Random vibration analysis is a mathematical tool that offers great advantages in predicting the mechanical response of structural systems subjected to external dynamic loads whose nature is intrinsically stochastic, as in cases of sea waves, wind ...
M. Domaneschi   +5 more
doaj   +1 more source

Attitude control precision analysis for hypersonic vehicles based on covariance analysis describing equation technique

open access: yesAdvances in Mechanical Engineering, 2018
This article investigates a control precision analysis based on covariance analysis describing equation technique for the generic hypersonic vehicle attitude tracking system. For a nominal generic hypersonic vehicle attitude system, a global sliding mode
Jianguo Guo, Xinming Wang, Jun Zhou
doaj   +1 more source

The Scale Analysis of Bivariate Non-Gaussian Time Series via Wavelet Cross-Covariance [PDF]

open access: yes, 1998
this paper we study the scale analysis of bivariate time series through use of the wavelet cross-covariance. If
A. Serroukh   +2 more
core  

Covariance-Based Sample Selection for Heterogeneous Data: Applications to Gene Expression and Autism Risk Gene Detection [PDF]

open access: yes, 2020
Risk for autism can be influenced by genetic mutations in hundreds of genes. Based on findings showing that genes with highly correlated gene expressions are functionally interrelated, “guilt by association” methods such as DAWN have been developed to ...
Han Liu (288039)   +2 more
core   +1 more source

The hippocampal network model: A transdiagnostic metaconnectomic approach

open access: yesNeuroImage: Clinical, 2018
Purpose: The hippocampus plays a central role in cognitive and affective processes and is commonly implicated in neurodegenerative diseases. Our study aimed to identify and describe a hippocampal network model (HNM) using trans-diagnostic MRI data from ...
Eithan Kotkowski   +4 more
doaj   +1 more source

PENERAPAN METODE LEAST MEDIAN SQUARE-MINIMUM COVARIANCE DETERMINANT (LMS-MCD) DALAM REGRESI KOMPONEN UTAMA

open access: yesE-Jurnal Matematika, 2013
Principal Component Regression is a method to overcome multicollinearity techniques by combining principal component analysis with regression analysis.
I PUTU EKA IRAWAN   +2 more
doaj   +1 more source

Estimating High Dimensional Covariance Matrices and its Applications [PDF]

open access: yes
Estimating covariance matrices is an important part of portfolio selection, risk management, and asset pricing. This paper reviews the recent development in estimating high dimensional covariance matrices, where the number of variables can be greater ...
Jushan Bai, Shuzhong Shi
core  

General covariance from the perspective of Noether's theorems [PDF]

open access: yes, 2002
Analysis of Emmy Noether's 1918 theorems provides an illuminating method for testing the consequences of coordinate generality, and for exploring what else must be added to this requirement in order to give general covariance its far-reaching physical ...
Brading, Katherine   +2 more
core  

Analysis of Semi-Blind Channel Estimation in Multiuser Massive MIMO Systems With Perturbations

open access: yesIEEE Access, 2019
In the massive multiple-input multiple-output (MIMO) systems, pilot contamination and signal perturbation are two important issues in the semi-blind channel estimation methods.
Cheng Hu, Hong Wang, Rongfang Song
doaj   +1 more source

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