Results 31 to 40 of about 373,972 (292)

Two-stage robust optical flow estimation [PDF]

Proceedings IEEE Conference on Computer Vision and Pattern Recognition. CVPR 2000 (Cat. No.PR00662), 2002
We formulate optical flow estimation as a two-stage regression problem. Based on characteristics of these two regression models and conclusions on modern regression methods, we choose a least trimmed squares followed by a weighted least squares estimator to solve the optical flow constraint (OFC); and at places where this one-stage robust method fails ...
M. Ye, R.M. Haralick
openaire   +1 more source

Two-Stage Channel Estimation for Semi-Passive RIS-Assisted Millimeter Wave Systems

Sensors, 2022
In a reconfigurable intelligent surface (RIS) assisted millimeter Wave (mmWave) communication system, the channel coefficient increases exponentially with the number of RIS elements which results in expensive pilot overhead.
Chengzuo Peng, Honggui Deng, Haoqi Xiao, Yuyan Qian, Wenjuan Zhang, Yinhao Zhang   +5 more
doaj   +1 more source

Two-stage re-estimation adaptive design: a simulation study

Epidemiology, Biostatistics and Public Health, 2013
Background: adaptive clinical trial design has been proposed as a promising new approach to improve the drug discovery process. Among the many options available, adaptive sample size re-estimation is of great interest mainly because of its ability to ...
Francesca Galli, Luigi Mariani
doaj   +1 more source

Estimation of Tropical Cyclone Intensity via Deep Learning Techniques from Satellite Cloud Images

Remote Sensing, 2023
Estimating the intensity of tropical cyclones (TCs) is usually involved as a critical step in studies on TC disaster warnings and prediction. Satellite cloud images (SCIs) are one of the most effective and preferable data sources for TC research. Despite
Biao Tong, Jiyang Fu, Yaxue Deng, Yongjun Huang, Pakwai Chan, Yuncheng He   +5 more
doaj   +1 more source

Two-Stage Maximum Score Estimator

, 2020
This paper considers the asymptotic theory of a semiparametric M-estimator that is generally applicable to models that satisfy a monotonicity condition in one or several parametric indexes. We call the estimator two-stage maximum score (TSMS) estimator since our estimator involves a first-stage nonparametric regression when applied to the binary choice
Gao, Wayne Yuan, Xu, Sheng, Xu, Kan
openaire   +2 more sources

Millimeter-Wave Based Localization Using a Two-Stage Channel Estimation Relying on Few-Bit ADCs

IEEE Open Journal of the Communications Society, 2021
Benefiting from the high resolution in beamspace, millimeter wave (mmwave) communication has been regarded as a high-accuracy localization solution, where the location information is embedded in the channel via angle and time delay, for example.
Kunlun Li, Mohammed El-Hajjar, Lie-liang Yang   +2 more
doaj   +1 more source

A Novel Two-Stage Illumination Estimation Framework for Expression Recognition

The Scientific World Journal, 2014
One of the critical issues for facial expression recognition is to eliminate the negative effect caused by variant poses and illuminations. In this paper a two-stage illumination estimation framework is proposed based on three-dimensional representative ...
Zheng Zhang, Guozhi Song, Jigang Wu
doaj   +1 more source

Deciphering the contributions of spectral and structural data to wheat yield estimation from proximal sensing

Crop Journal, 2022
Accurate, efficient, and timely yield estimation is critical for crop variety breeding and management optimization. However, the contributions of proximal sensing data characteristics (spectral, temporal, and spatial) to yield estimation have not been ...
Qing Li, Shichao Jin, Jingrong Zang, Xiao Wang, Zhuangzhuang Sun, Ziyu Li, Shan Xu, Qin Ma, Yanjun Su, Qinghua Guo, Dong Jiang   +10 more
doaj   +1 more source

Two-Stage Limited-Information Estimation for Structural Equation Models of Round-Robin Variables

Stats
We propose and demonstrate a new two-stage maximum likelihood estimator for parameters of a social relations structural equation model (SR-SEM) using estimated summary statistics (Σ^) as data, as well as uncertainty about Σ^ to obtain robust inferential ...
Terrence D. Jorgensen, Aditi M. Bhangale, Yves Rosseel   +2 more
doaj   +1 more source

Psychosocial Outcomes in Patients With Endocrine Tumor Syndromes: A Systematic Review

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction The combination of disease manifestations, the familial burden, and varying penetrance of endocrine tumor syndromes (ETSs) is unique. This review aimed to portray and summarize available data on psychosocial outcomes in patients with ETSs and explore gaps and opportunities for future research and care.
Daniël Zwerus, Floortje Strobbe, Annemarie A. Verrijn Stuart, Hanneke M. van Santen, Gerlof D. Valk, Sasja A. Schepers, Rachel S. van Leeuwaarde   +6 more
wiley   +1 more source