22 papers · ranked by Valyu relevance
M. S. Li, D. Ward, R. Stables, W. L. Chua + 3 more
In the absence of a conductor, members of a music ensemble need to take their timing cues from each other in order to play together. These timing cues may be visual or auditory. This paper investigates the use of auditory cues in the absence of visual cues. We applied a Linear Phase Correction Model1 to investigate the…
Seung-Jae Son, Yatong An, Jae-Sang Hyun
Fringe Projection Profilometry (FPP) systems using miniaturized DOE pro-jectors often suffer from severe phase artifacts due to nonlinear projection characteristics and limited pattern controllability. We propose a ray-based phase error correction framework that models phase artifacts along projection rays from the…
Bo Li, Falin Liu, Chongbin Zhou, Yuanhao Lv + 2 more
'Ram M. Narayanan'] Defocus of the reconstructed image of synthetic aperture radar (SAR) occurs in the presence of the phase error. In this work, a phase error correction method is proposed for compressed sensing (CS) radar imaging based on approximated observation. The proposed method has better image focusing ability…
Authors not listed
Material properties calculated using density functional theory (DFT) are often corrected to more closely match experimental values, but the most common correction method has flaws that lead to unphysical results and false positives in the material discovery process. In this work, we show that these flaws stem from the…
Sanghoon Jeon, H. J. Lee, Jaesung Lee, B.H. Kang + 3 more
projection system Authors: ['Sanghoon Jeon' 'H. J. Lee' 'Jaesung Lee' 'B.H. Kang' 'Byung-Wook Jeon' 'Jun Young Yoon' 'Jae‐Sang Hyun'] In phase-shifting profilometry (PSP), any motion during the acquisition of fringe patterns can introduce errors because it assumes both the object and measurement system are stationary.…
Xiheng Li, Yu Liu, Shunjun Wei
Atmospheric phase error is the main factor affecting the accuracy of ground-based synthetic aperture radar (GB-SAR). The atmospheric phase screen (APS) may be very complicated, so the atmospheric phase correction (APC) model is very important; in particular, the parameters to be estimated in the model are the key to…
Nan Wang, Daniel Abraham, Zachary Shah, Yimeng Lin + 15 more
To develop a Field-Correcting GRAPPA (FCG) technique to correct the spatiotemporal-varying phase errors in EPI caused by eddy currents. The fast-changing gradient in EPI causes strong eddy current effects and associated spatiotemporal-varying phase errors, producing significant image artifacts. The use of higher…
Zengshu Huang, Jinping Sun, Qing Li, Weixian Tan + 2 more
'Yaolong Qi'] Ground-based synthetic aperture radar (GB-SAR) uses active microwave remote-sensing observation mode to achieve two-dimensional deformation measurement and deformation trend extraction, which shows great prospects in the field of deformation monitoring. However, in the process of GB-SAR deformation…
David J. Ma, Hortense A-M. Le, Yuming Ye, Andrew F. Laine + 4 more
We introduce DeepSPEC, a novel convolutional neural network (CNN) -based approach for frequency-and-phase correction (FPC) of MRS spectra to achieve fast and accurate FPC of single-voxel PRESS MRS and MEGA-PRESS data. In DeepSPEC, two neural networks, including one for frequency correction and one for phase correction…
Huakun Li, Bingyao Tan, Vimal Prabhu Pandiyan, Veluchamy Amutha Barathi + 3 more
Phase-sensitive Fourier-domain optical coherence tomography (FD-OCT) enables in-vivo, label- free imaging of cellular movements with detection sensitivity down to the nanometer scale, and it is widely employed in emerging functional imaging modalities, such as optoretinography (ORG), Doppler OCT, and optical coherence…
Xinze Ma, Wenhe Yan, Zhaopeng Hu, Jiangbin Yuan + 2 more
Highlights What are the main findings?1. A phase-variation-based propagation-delay correction method is developed for very-low-frequency (VLF) timing signals. 2. The corrected standard deviation is reduced to 2.0054-2.2500 μs for the Chongqing paths and 2.7987-4.4792 μs for the Guilin paths, while the corrected RMSE…
Poppy L. Martin, Justin D. Bray, Anna M. M. Scaife
For a ground-based radio interferometer observing at low frequencies, the ionosphere causes propagation delays and refraction of cosmic radio waves which result in phase errors in the received signal. These phase errors can be corrected using a calibration method that assumes a two-dimensional phase screen at a fixed…
David J. Ma, Yanting Yang, Natalia Harguindeguy, Ye Tian + 1 more
A novel convolutional neural network based spectral registration (CNN-SR) approach is introduced to achieve efficient and accurate simultaneous frequency-and-phase correction (FPC) of single-voxel MEGA-PRESS magnetic resonance spectroscopy (MRS) data. For this approach, one neural network was trained and validated…
Pavol Skubák, Navraj S. Pannu
A cross-validation-based method for bias reduction in ‘classical’ iterative density modification of experimental X-ray crystallography maps provides significantly more accurate phase-quality estimates and leads to improved automated model building.
Zherui Li, Kai Yu, Joshua Kosnoff, Bin He
Transcranial focused ultrasound (tFUS) has emerged as a promising non-invasive modality for precision neuromodulation. However, the heterogeneous acoustic properties of the skull often induce phase aberrations that shift the ultrasound focus and compromise energy delivery. In this study, we developed and validated a…
Zhaowen Wang
Injection-Locked Ring Oscillators Authors: ['Zhaowen Wang'] Abstract—Multi-phase injection-locked ring oscillators (MP-ILROs) are widely used for multi-phase clock generation, with their phase accuracy primarily determined by the inherent accuracy of the oscillator itself, due to the suppression of input signal errors.…
Fuqian Li, Wenjing Chen, Liang Zhang, Mohammed Bennamoun + 1 more
'Mingtao Feng'] Crossed-grating phase-shifting profilometry (CGPSP) has great utility in three-dimensional shape measurement due to its ability to acquire horizontal and vertical phase maps in a single measurement. However, CGPSP is extremely sensitive to the non-linearity effect of a digital fringe projection system…
Roberto D. Pascual-Marqui, Rolando J. Biscay, Jorge Bosch-Bayard, Pascal Faber + 5 more
The sharing and the transmission of information between cortical brain regions is carried out by mechanisms that are still not fully understood. A deeper understanding should shed light on how consciousness and cognition are implemented in the brain. Research activity in this field has recently been focusing on the…
Vladimir Sovljanski, Mario Paolone
This paper investigates the identification of observable low-frequency (LF) parameters of battery cell's equivalent circuit models (ECMs) using time-domain voltage and current measurements sampled at low frequency by built-in battery management systems (BMS) during operation. Accurate estimation of such parameters is…
Kevin Robben, Christopher Cheatum
We report a comprehensive study of the efficacy of least-squares fitting of multidimensional spectra to generalized Kubo lineshape models and introduce a novel least-squares fitting metric, termed the Scale Invariant Gradient Norm (SIGN), that enables a highly reliable and versatile algorithm. The precision of…
Pavel Buslaev, Noora Aho, Anton Jansen, Paul Bauer + 2 more
Various approaches have been proposed to include the effect of pH in Molecular Dynamics (MD) simulations. Among these, the lambda-dynamics approach proposed by Brooks and co-workers can be performed with little computational overhead and hence be used to routinely perform MD simulations at microsecond timescales, as…
Luke Allan, Tim Zuehlsdorff
The second order cumulant method offers a promising pathway to predicting optical properties in condensed phase systems. It allows for the computation of linear absorption spectra from excitation energy fluctuations sampled along molecular dynamics (MD) trajectories, fully accounting for vibronic effects, direct…