Results 21 to 30 of about 732,139 (286)

Quadratic Constrained Quadratic Estimation for Distribution Network with Limited Measurements [PDF]

open access: yesE3S Web of Conferences, 2021
Practical and efficient state estimation is essential for the safe and stable operation of future smart grid. In rectangular coordinates, distribution system state estimation (DSSE) problem can be described as a sparse quadratic constraint quadratic ...
Long Cheng   +4 more
doaj   +1 more source

Estimating the Spectrum in Computed Tomography Via Kullback–Leibler Divergence Constrained Optimization [PDF]

open access: yes, 2018
Purpose We study the problem of spectrum estimation from transmission data of a known phantom. The goal is to reconstruct an x‐ray spectrum that can accurately model the x‐ray transmission curves and reflects a realistic shape of the typical energy ...
Barber, Rina Foygel   +4 more
core   +3 more sources

The adaptive neural network sliding mode control for angle/force tracking of the dexterous hand

open access: yesAdvances in Mechanical Engineering, 2021
In order to achieve high precision control of the dexterous hand, an adaptive neural network sliding mode control algorithm based on the U-K (Udwadia-Kalaba) equation is proposed. Firstly, based on the U-K equation and considering the ideal and non-ideal
Xing Qin, Heng Shi, Xin Gao, Xiyu Li
doaj   +1 more source

Variational analysis of constrained M-estimators [PDF]

open access: yesThe Annals of Statistics, 2020
We propose a unified framework for establishing existence of nonparametric M-estimators, computing the corresponding estimates, and proving their strong consistency when the class of functions is exceptionally rich. In particular, the framework addresses situations where the class of functions is complex involving information and assumptions about ...
Royset, Johannes O., Wets, Roger J-B
openaire   +5 more sources

Projection Estimates of Constrained Functional Parameters [PDF]

open access: yesSSRN Electronic Journal, 2005
AMS classifications: 62G05; 62G07; 62G08; 62G20; 62G32;
Fils-Villetard, A.   +2 more
openaire   +4 more sources

Complex Human Pose Estimation via Keypoints Association Constraint Network

open access: yesIEEE Access, 2020
Human pose estimation has attracted enormous interest in the field of human action recognition. When the human pose is complex (such as pose distortion, pose reversal, etc.) or there is background interference (multi-target, shadow, etc.), the keypoints ...
Xuan Zhu   +6 more
doaj   +1 more source

Applying positivity constraints to q-space trajectory imaging: The QTI+ implementation

open access: yesSoftwareX, 2022
Diffusion MRI is a powerful technique sensitive to the microstructure of heterogeneous media. By relating the dMRI signal obtained via general gradient waveforms to the moments of an underlying diffusion tensor distribution, q-space trajectory imaging ...
Deneb Boito   +3 more
doaj   +1 more source

Optimal segmentation and improved abundance estimation for superpixel-based Hyperspectral Unmixing

open access: yesEuropean Journal of Remote Sensing, 2022
Superpixel-based hyperspectral unmixing (HU) can effectively reduce spectral variability’s influence on unmixing performance. In the superpixel-based HU method, this study proposes a segmentation scale determination method to improve the accuracy of ...
Qiang Guan   +4 more
doaj   +1 more source

Estimating parameters for generalized mass action models with connectivity information

open access: yesBMC Bioinformatics, 2009
Background Determining the parameters of a mathematical model from quantitative measurements is the main bottleneck of modelling biological systems. Parameter values can be estimated from steady-state data or from dynamic data.
Voit Eberhard O   +2 more
doaj   +1 more source

Conditional average treatment effect estimation with marginally constrained models

open access: yesJournal of Causal Inference, 2023
Treatment effect estimates are often available from randomized controlled trials as a single average treatment effect for a certain patient population.
van Amsterdam Wouter A. C.   +1 more
doaj   +1 more source

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