Results 111 to 120 of about 547,601 (228)

Robust Adaptive Beamforming with Optimal Covariance Matrix Estimation in the Presence of Gain-Phase Errors. [PDF]

Sensors (Basel), 2020
Yao D, Zhang X, Hu B, Yang Q, Wu X.
europepmc   +1 more source

Estimation of the signal subspace without estimation of the inverse covariance matrix [PDF]

Let a high-dimensional random vector X can be represented as a sum of two components - a signal S, which belongs to some low-dimensional subspace S, and a noise component N.
Vladimir Panov
core  

Application of regularized covariance matrices in logistic regression and portfolio optimization

Scientific Reports
Covariance estimation has widespread applications in various fields such as logistic regression and portfolio optimization. However, in high-dimensional or small-sample scenarios, traditional covariance matrix estimation often encounters the problem of ...
Fang Sun, Xiaoqing Huang
doaj   +1 more source

A Shrinkage Approach to Large-Scale Covariance Matrix Estimation and Implications for Functional Genomics

Statistical Applications in Genetics and Molecular Biology, 2005
J. Schäfer, K. Strimmer
semanticscholar   +1 more source

Weighted average ensemble for Cholesky-based covariance matrix estimation

Statistical Theory and Related Fields
The modified Cholesky decomposition (MCD) is an efficient technique for estimating a covariance matrix. However, it is known that the MCD technique often requires a pre-specified variable ordering in the estimation procedure.
Xiaoning Kang, Zhenguo Gao, Xi Liang, Xinwei Deng   +3 more
doaj   +1 more source

Channel Covariance Matrix Estimation via Dimension Reduction for Hybrid MIMO MmWave Communication Systems. [PDF]

Sensors (Basel), 2019
Hu R, Tong J, Xi J, Guo Q, Yu Y.
europepmc   +1 more source

Covariance Matrix Estimation for the Cryo-EM Heterogeneity Problem. [PDF]

SIAM J Imaging Sci, 2015
Katsevich E, Katsevich A, Singer A.
europepmc   +1 more source

Coded Aperture Optimization in X-Ray Computed Tomography via Sparse Covariance Matrix Estimation. [PDF]

Sensors (Basel)
Jiang Y, Mao T, Zhou J, Zhao Q, Yin J, Yi X, Wu H.   +6 more
europepmc   +1 more source

Research on AUV Underwater Localization Method Based on an n-Shaped Array. [PDF]

Sensors (Basel)
Han C, Gao M, Shen T, Guo C.
europepmc   +1 more source

Research on the Control Algorithm for a Brushless DC Motor Based on an Adaptive Extended Kalman Filter. [PDF]

Sensors (Basel)
Jinwu T, Lifan Z, Xinyun L, Peng L, Jin S, Shujun L.   +5 more
europepmc   +1 more source