Results 181 to 190 of about 2,028,161 (229)

Estimation in flexible two stage designs

Statistics in Medicine, 2006
Adaptive test designs for clinical trials allow for a wide range of data driven design adaptations using all information gathered until an interim analysis. The basic principle is to use a test statistics which is invariant with respect to the design adaptations under the null hypothesis.
Werner, Brannath, Franz, König, Peter, Bauer   +2 more
openaire   +2 more sources

A Two-Stage Estimation Algorithm Based on Variable Projection Method for GPS Positioning

IEEE Transactions on Instrumentation and Measurement, 2018
In some complex environments, nonline-of-sight (or multipath) usually introduces an additional path delay to the pseudorange, which is known to be one of the most dominant sources of accuracy degradation in global navigation satellite systems (GNSSs ...
Guang-yong Chen, Min Gan, C. L. Chen, Long Chen   +3 more
semanticscholar   +1 more source

Joint two‐stage multi‐innovation recursive least squares parameter and fractional‐order estimation algorithm for the fractional‐order input nonlinear output‐error autoregressive model

International Journal of Adaptive Control and Signal Processing, 2023
This paper mainly investigates the issue of parameter identification for the fractional‐order input nonlinear output error autoregressive (IN‐OEAR) model.
Chong Hu, Yan Ji, Caiqing Ma
semanticscholar   +1 more source

Two Stages Liu Regression Estimator

Communications in Statistics - Simulation and Computation, 2015
This paper introduces a new estimator for multicollinearity and autocorrelated errors. We propose the Two Stages Liu estimator (TL) for the multiple linear regression model which suffers from autocorrelation AR(1) and multicollinearity problems. We use a mixed method to apply the two stages least squares procedure (TS) for deriving the TL estimator. We
Issam Dawoud, Selahattin Kaçiranlar
openaire   +1 more source

Two-Stage Channel Estimation for mmWave Massive MIMO Systems Based on ResNet-UNet

IEEE Systems Journal, 2023
For millimeter wave massive multiple-input multiple-output systems, the transceiver usually adopts a hybrid precoding structure to reduce complexity and cost, which poses great challenges to the acquisition of channel state information, especially in the
Junhui Zhao, Yao Wu, Qingmiao Zhang, Jieyu Liao   +3 more
semanticscholar   +1 more source

A Two-Stage Estimation Strategy Based on a Multistate Model for State-of-Health of Lithium-Ion Batteries

IEEE Transactions on Transportation Electrification
The state of health (SOH) is a significant index for the safe and reliable performance of lithium-ion batteries (LIBs). Although electrochemical impedance spectroscopy (EIS) is a promising nondestructive technique for SOH estimation, existing ...
Xuexia Zhang, Sidi Dong, Ruike Huang, Lei Huang, Zhaobin Shi, Yilin Meng   +5 more
semanticscholar   +1 more source

Two-Stage Channel Estimation for RIS-Aided Multiuser mmWave Systems With Reduced Error Propagation and Pilot Overhead

IEEE Transactions on Signal Processing, 2023
In this paper, we propose a novel two-stage uplink channel estimation strategy with reduced pilot overhead and error propagation for reconfigurable intelligent surface (RIS)-aided multi-user (MU) millimeter wave (mmWave) multiple-antenna systems.
Zhendong Peng, Cunhua Pan, Gui Zhou, Hong Ren, Shi Jin, P. Popovski, Robert Schober, X. You   +7 more
semanticscholar   +1 more source

A Two‐Stage Stepwise Estimation Procedure

Biometrics, 2008
Summary This article proposes a two‐stage simultaneous confidence procedure for the comparisons of k pairs of population means, without using multiplicity adjustment of more than two populations. The proposed procedure can be broadly applied to parametric or nonparametric models.
openaire   +3 more sources

Matching Is Not Enough: A Two-Stage Framework for Category-Agnostic Pose Estimation

Computer Vision and Pattern Recognition, 2023
Category-agnostic pose estimation (CAPE) aims to predict keypoints for arbitrary categories given support images with keypoint annotations. Existing approaches match the keypoints across the image for localization.
Min Shi, Zihao Huang, Xianzheng Ma, Xiaowei Hu, Zhiguo Cao   +4 more
semanticscholar   +1 more source

A Two-Stage Channel Estimation Algorithm for OTFS in Fractional Doppler Channels

IEEE Communications Letters, 2023
Orthogonal time-frequency space (OTFS) modulation is a promising modulation technology, which can provide superior performance under high-mobility radio scenarios.
Xiaolin He, Pingzhi Fan, Qianli Wang
semanticscholar   +1 more source