Results 11 to 20 of about 5,707,772 (176)
Reconfigurable Intelligent Surfaces Assisted Communications With Limited Phase Shifts: How Many Phase Shifts Are Enough? [PDF]
IEEE Transactions on Vehicular Technology, 2019 Reconfigurable intelligent surface (RIS) has drawn a great attention worldwide as it can create favorable propagation conditions by controlling the phase shifts of the reflected signals at the surface to enhance the communication quality.
Hongliang Zhang +3 more
semanticscholar +1 more source
Residual-based tests for cointegration in models with regime shifts
, 1996 In this paper we examine tests for cointegration which allow for the possibility of regime shifts. We propose augmented Dickey-Fuller (ADF) and Phillips type tests designed to test the null of no cointegration against the alternative of cointegration in ...
Allan W. Gregory, B. Hansen
semanticscholar +1 more source
Automatic Detection of Key Innovations, Rate Shifts, and Diversity-Dependence on Phylogenetic Trees [PDF]
PLoS ONE, 2014 A number of methods have been developed to infer differential rates of species diversification through time and among clades using time-calibrated phylogenetic trees.
D. Rabosky
semanticscholar +1 more source
A Quantum Scattering Interferometer [PDF]
, 2007 The collision of two ultra-cold atoms results in a quantum-mechanical superposition of two outcomes: each atom continues without scattering and each atom scatters as a spherically outgoing wave with an s-wave phase shift.
A Widera +31 more
core +2 more sources
Transformational shifts through digital servitization
Industrial Marketing Management, 2020 Manufacturers increasingly look to digitalization to drive service growth. However, success is far from guaranteed, and many firms focus too much on technology.
B. Tronvoll +3 more
semanticscholar +1 more source
Gibbs‐ringing artifact removal based on local subvoxel‐shifts [PDF]
Magnetic Resonance in Medicine, 2015 To develop a fast and stable method for correcting the gibbs‐ringing artifact.
E. Kellner, B. Dhital, M. Reisert
semanticscholar +1 more source
, 2018 The classification of homogeneous scalar weighted shifts is known. Recently, Kor\'{a}nyi obtained a large class of inequivalent irreducible homogeneous bi-lateral $2$-by-$2$ block shifts.
Hazra, Somnath
core +1 more source
Discrete Denoising with Shifts
, 2007 We introduce S-DUDE, a new algorithm for denoising DMC-corrupted data. The algorithm, which generalizes the recently introduced DUDE (Discrete Universal DEnoiser) of Weissman et al., aims to compete with a genie that has access, in addition to the noisy ...
Senior Member +2 more
core +4 more sources
Beamforming Optimization for Intelligent Reflecting Surface with Discrete Phase Shifts [PDF]
IEEE International Conference on Acoustics, Speech, and Signal Processing, 2018 Intelligent reflecting surface (IRS) is a cost-effective solution for achieving high spectrum and energy efficiency in future wireless communication systems by leveraging massive low-cost passive elements that are able to reflect the signals with ...
Qingqing Wu, Rui Zhang
semanticscholar +1 more source
Semi-parametric estimation of shifts
, 2007 We observe a large number of functions differing from each other only by a translation parameter. While the main pattern is unknown, we propose to estimate the shift parameters using $M$-estimators. Fourier transform enables to transform this statistical
Gamboa, Fabrice +2 more
core +3 more sources