Results 31 to 40 of about 723,703 (287)

Empirical likelihood estimation of the spatial quantile regression [PDF]

open access: yes, 2012
The spatial quantile regression model is a useful and flexible model for analysis of empirical problems with spatial dimension. This paper introduces an alternative estimator for this model.
A Owen   +32 more
core   +1 more source

Speed sensorless vector control of parallel-connected three-phase two-motor single-inverter drive system

open access: yesFACETS, 2016
This paper presents the characteristic behavior of direct vector control of two induction motors with sensorless speed feedback having the same rating parameters, paralleled combination, and supplied from a single current-controlled pulse-width-modulated
R. Gunabalan   +5 more
doaj   +1 more source

Green roof in module of climate chamber

open access: yesSelected Scientific Papers: Journal of Civil Engineering, 2019
The submitted article is devoted to the research of the green roofs located at Faculty of civil engineering of Technical University of Kosice.
Baláž Richard   +2 more
doaj   +1 more source

Position and Speed Control of Brushless DC Motors Using Sensorless Techniques and Application Trends

open access: yesSensors, 2010
This paper provides a technical review of position and speed sensorless methods for controlling Brushless Direct Current (BLDC) motor drives, including the background analysis using sensors, limitations and advances.
Jaime Gómez-Gil   +2 more
doaj   +1 more source

Recursive trimmed filter in eliminating high density impulse noise from digital image

open access: yesDesimal, 2023
Advances in technology have made it easier to share media over the Internet. In the process of media sharing, a media may receive noise or interference that results in loss of information.
Ilyasa Pahlevi Reza Yulianto   +2 more
doaj   +1 more source

On the convergence of Maronna's $M$-estimators of scatter [PDF]

open access: yes, 2014
In this paper, {we propose an alternative proof for the uniqueness} of Maronna's $M$-estimator of scatter (Maronna, 1976) for $N$ vector observations $\mathbf y_1,...,\mathbf y_N\in\mathbb R^m$ under a mild constraint of linear independence of any subset
Chitour, Yacine   +2 more
core   +2 more sources

BUMVU Estimators

open access: yesSSRN Electronic Journal, 2023
We provide necessary and sufficient conditions for an (Unbiased) Block estimator to have Uniformly Minimum Variance. Our theory parallels the theory of UMVU estimation, the main novel insight being the focus on the covariance among blocks. We use this theory to derive lower variance bounds for block estimators of functionals of high-frequency ...
Kolokolov, Aleksey   +2 more
openaire   +1 more source

Exploiting Extrinsic Information for Serial MAP Detection by Utilizing Estimator in Holographic Data Storage Systems

open access: yesApplied Sciences
In the big data era, data are created in huge volume. This leads to the development of storage devices. Many technologies are proposed for the next generation of storage fields.
Thien An Nguyen, Jaejin Lee
doaj   +1 more source

Non-Data-Aided Parameter Estimation in an Additive White Gaussian Noise Channel

open access: yes, 2005
Non-data-aided (NDA) parameter estimation is considered for binary-phase-shift-keying transmission in an additive white Gaussian noise channel. Cramer-Rao lower bounds (CRLBs) for signal amplitude, noise variance, channel reliability constant and bit ...
Brannstrom, Fredrik, Rasmussen, Lars K.
core   +2 more sources

Convergence Rate Analysis of Distributed Gossip (Linear Parameter) Estimation: Fundamental Limits and Tradeoffs [PDF]

open access: yes, 2010
The paper considers gossip distributed estimation of a (static) distributed random field (a.k.a., large scale unknown parameter vector) observed by sparsely interconnected sensors, each of which only observes a small fraction of the field.
Kar, Soummya, Moura, Jose' M. F.
core   +3 more sources

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