Results 141 to 150 of about 73,425 (293)

Experimental study on the dynamic characteristics of slab track structure considering local defects and temperature gradient

Case Studies in Construction Materials
The unit slab track structure has been widely used in high-speed railways. Temperature gradients and local defects alter the interlayer condition of slab tracks, directly affecting the structure's dynamic performance.
Qiang Yi, Zeyu Wu, Zhiheng Li, Shuguo Wang, Lei Zhao   +4 more
doaj   +1 more source

Advancing Quantitative Susceptibility Mapping With 2.5D Diffusion Models for Rapid Intracranial Hemorrhage Quantification

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a generative diffusion model‐based approach for robust and efficient quantitative susceptibility mapping (QSM) reconstruction in intracranial hemorrhage (ICH), applicable to both standard gradient echo (GRE) and rapid echo planar imaging (EPI) acquisitions.
Zhuang Xiong, Yang Gao, Feng Liu, Derek Emery, Ken Butcher, Alan H. Wilman, Hongfu Sun   +6 more
wiley   +1 more source

Surface Crack Detection in Precasted Slab Track in High-Speed Rail via Infrared Thermography. [PDF]

Materials (Basel), 2020
Li ZW, Liu XZ, Lu HY, He YL, Zhou YL.
europepmc   +1 more source

DynaTOF: Time‐Resolved Noncontrast Cerebral MR Angiography Using Spatially Modulated RF Saturation

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a time‐resolved extension of three‐dimensional time‐of‐flight MR angiography, termed Dynamic TOF (DynaTOF), that exploits intrinsic RF saturation behavior to enable noncontrast visualization of cerebrovascular hemodynamics.
Naoyuki Takei, Keita Fujii, Xucheng Zhu, Yuichi Suzuki, Satoru Miyawaki, Motoyuki Umekawa, Satoshi Koizumi, Tetsuya Wakayama, Shiori Amemiya, Osamu Abe   +9 more
wiley   +1 more source

Hemodynamic Modeling and Phase‐Adjustable Reconstruction of Hyperpolarized Cardiac 13C MRS Using 1H Cine and ECG Timing

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To deconvolve cardiac phase and hemodynamic effects in hyperpolarized (HP) [1‐13C]pyruvate and to develop a cardiac phase‐adjustable reconstruction framework. Methods Cardiac phase drift during dynamic acquisition of HP 13C MRS and its effect on dynamic signal fidelity were simulated using a digital cardiac phantom. A hemodynamic model
Sung‐Han Lin, Corey Mozingo, Crystal E. Harrison, Kelley A. Derner, Craig R. Malloy, Jae Mo Park   +5 more
wiley   +1 more source

Non-destructive evaluation method for track slabs damaged by impact of ice blocks detached from high-speed trains

Scientific Reports
In winter snowy or rainy weather, the phenomenon of icing under rolling stock during high-speed operation is significantly severe, posing a potential risk of detachment and impact on track structures due to the presence of ice blocks with substantial ...
Xiaolin Song, Xuanran Fu, Dingjun Xiao, Cai Yi   +3 more
doaj   +1 more source

Geoid anomalies in the vicinity of subduction zones [PDF]

The regional geoid of the southwest Pacific is matched reasonably well by results from a model of the upper mantle density structure (including slabs) associated with subduction zones of the region.
Mcadoo, D. C.
core   +1 more source

Harvesting of two alpine Artemisia: Effects of an amateur practice on wild plant dynamics

PLANTS, PEOPLE, PLANET, EarlyView.
Wild plants are consumed all over the world, and knowledge of the effects of harvesting is necessary to ensure the sustainability of this activity. Our 3‐year study of two closely related alpine Artemisia species in the Southern Alps revealed a positive impact of harvesting at the plant scale and on the short term.
Ninon Fontaine, Perrine Gauthier, Sophie Caillon, John D. Thompson, Isabelle Boulangeat   +4 more
wiley   +1 more source

Stiffness and Vibration Reduction Performance of Double-block Floating Slab Track Vibration Isolators

Chengshi guidao jiaotong yanjiu
[Objective] To address the shortcomings currently present in high-performance and special vibration-reducing floating slab track systems, such as poor accuracy in maintaining the rail bottom gradient and insufficient construction precision, the CRTS ...
SHEN Shanshan, YU Lei, HUANG Huichao, GU Chengpeng   +3 more
doaj   +1 more source

Enabling Under Ice Glider Operations: A Backseat Driver Approach

Journal of Field Robotics, EarlyView.
ABSTRACT Polar Oceans are key locations for forcing global ocean circulation, influencing both global climate and biogeochemical cycles. Due to restricted access to these seasonally and perennially ice‐covered regions, these areas are severely undersampled.
Yaomei Wang, Benjamin Allsup, Georgios Salavasidis, Stephen Woodward, Adeniyi Adenaya, Mike Smart, Alexis Johnson, Felipe Marques Dos Santos, Jake Ludgate, Daniel Matterson, Alvaro Lorenzo, J. Alexander Brearley, Alexander Brian Phillips   +12 more
wiley   +1 more source