Results 31 to 40 of about 9,298,099 (293)

Low-Dose CT Image Reconstruction With a Deep Learning Prior

IEEE Access, 2020
In low-dose computed tomography (LDCT), a penalized weighted least squares (PWLS) approach that incorporates the Poisson statistics of X-ray photons can significantly reduce excessive quantum noise.
Hyoung Suk Park, Kyungsang Kim, Kiwan Jeon   +2 more
doaj   +1 more source

Analysing the spatial context of the altimetric error pattern of a digital elevation model using multiscale geographically weighted regression

European Journal of Remote Sensing, 2023
Many freely available Digital Elevation Models (DEM) have increasingly been used worldwide due to the difficulty in acquiring accurate elevation data in some regions, emphasizing the need to investigate their accuracy and the factors that may influence ...
Zuleide Ferreira, Ana Cristina Costa, Pedro Cabral   +2 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Orthogonal least squares regression with tunable kernels [PDF]

, 2005
A novel technique is proposed to construct sparse regression models based on the orthogonal least squares method with tunable kernels. The proposed technique tunes the centre vector and diagonal covariance matrix of individual regressor by incrementally ...
Wang, X.X., Chen, S., Brown, D.J.
core   +2 more sources

Enhancing Seafloor Topography Inversion Based on Marine Gravity Data Using Robust Weighted Total Least Squares

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The seafloor topography (ST) is essential for oceanographic research and geophysical applications, and its modeling relies on satellite altimetry-derived gravity data.
Fengshun Zhu, Rumeng Guo, Jinbo Li, Jianqiao Xu, Jiangcun Zhou, Jinyun Guo, Shuai Zhou, Yang Li, Heping Sun   +8 more
doaj   +1 more source

An Improved Point-to-Plane Registration Method for Terrestrial Laser Scanning Data

IEEE Access, 2018
Registration of point clouds is vital in point cloud data processing. By registering, the point cloud data from different views are transformed into a common coordinate system.
Wuyong Tao, Xianghong Hua, Kegen Yu, Xiaoxing He, Xijiang Chen   +4 more
doaj   +1 more source

WTLS iterative algorithm of 3D similarity coordinate transformation based on Gibbs vectors

Earth, Planets and Space, 2020
The 3D similarity coordinate transformation is fundamental and frequently encountered in many areas of work such as geodesy, engineering surveying, LIDAR, terrestrial laser scanning, photogrammetry, machine vision, etc.
Huaien Zeng, Guobin Chang, Haiqing He, Kezhao Li   +3 more
doaj   +1 more source

Developmental programmes drive cellular plasticity, disease progression and therapy resistance in lung adenocarcinoma

Molecular Oncology, EarlyView.
This study shows that lung adenocarcinomas exploit developmental branching morphogenesis to acquire a therapy resistant basal‐like tumour cell state. This process was found to be regulated by combined TP53 loss‐of‐function and type‐I interferon signalling, identifying a novel axis for biomarker and therapeutic target discovery.
Kamila J Bienkowska, Stephany Gallardo, Nur S. Zainal, Leena Arora, Matthew Ellis, Maria‐Antoinette Lopez, Judith Austine, Sai Pittla, Serena J Chee, Aiman Alzetani, Emily C Shaw, Christian H Ottensmeier, Gareth J Thomas, Christopher J Hanley   +13 more
wiley   +1 more source

Effects of errors-in-variables on the internal and external reliability measures

Geodesy and Geodynamics
The reliability theory has been an important element of the classical geodetic adjustment theory and methods in the linear Gauss-Markov model. Although errors-in-variables (EIV) models have been intensively investigated, little has been done about ...
Yanxiong Liu, Yun Shi, Peiliang Xu, Wenxian Zeng, Jingnan Liu   +4 more
doaj   +1 more source

Performance Capabilities of Long-Range UWB-IR TDOA Localization Systems

EURASIP Journal on Advances in Signal Processing, 2008
The theoretical and practical performance limits of a 2D ultrawideband impulse-radio localization system operating in the far field are studied under the assumption that estimates of location are based on time-difference-of-arrival (TDOA) measurements ...
Divya Rao, Richard J. Barton
doaj   +1 more source