Results 91 to 100 of about 687,643 (290)
Experimental Validation of an Adjustable Railway Fastening for Slab Track
Journal of Testing and Evaluation, 2010 Abstract A railway infrastructure capable of supporting a high frequency of light and heavy traffic, sometimes at high speed, requires the implementation of a high quality track. A correct definition of all track components leads to a high degree of safety and comfort for travelers as well as reduced operating costs.
Diego Cavia, Soraya +4 more
openaire +2 more sources
Advanced Science, EarlyView.A charge‐transfer‐engineered Ni catalyst derived from an atomically mixed layered precursor enables efficient ammonia‐to‐hydrogen conversion. Cr‐to‐Ni electron transfer creates electron‐rich Ni active sites that favor NH3 adsorption, modify the dehydrogenation energetics, and weaken N2 binding to facilitate product desorption. This electronically tuned
Donghyeok Kim +9 more
wiley +1 more source
Angewandte Chemie, EarlyView.LiMn2O4${\rm LiMn}_2{\rm O}_4$ is of high interest for sustainable energy storage and conversion. Its mixed‐valence Mn3+${\rm Mn}^{3+}$/Mn4+${\text{Mn}}^{4+}$ structure drives site‐specific behavior at aqueous interfaces, featuring proton‐generating Mn4+${\text{Mn}}^{4+}$ centers and electron‐rich Mn3+${\rm Mn}^{3+}$ sites that render the surrounding ...
K. Nikolas Lausch +3 more
wiley +2 more sources
, 2010 With a longitudinally coupled slab track turnout on LeiDa Bridge on the Wuhan–Guangzhou passenger dedicated line in China as an example, an integral finite element model of a turnout (crossover)–slab track–bridge–pier was developed.
JuanJuan Ren, Xueyi Liu, Rui Xiang
core +1 more source
Optical Access to Dark Excitons Via Spin–Phonon Fano Interference
Advanced Science, EarlyView.Dark excitons in quantum dots neither absorb nor emit light and stay hidden from optical spectroscopy. Quantum interference now reveals them: light scattered by acoustic phonons interferes with a phonon‐assisted spin flip between bright and dark exciton, carving a Fano dip into the spectrum whose position gives the bright–dark splitting. Magnetic field,
Janina J. Schindler +7 more
wiley +1 more source
Angewandte Chemie, EarlyView.Machine learning has digitalized heterogeneous catalysis from the top of the length scale downward: prediction at the atom and the material is now mature, yet the reactor and the process remain the open frontier. This critical review traces a decade of progress across the full catalytic value chain and asks where the next decade of impact must be won ...
Rafael Larraz, Avelino Corma
wiley +2 more sources
MODELLING TECHNIQUES FOR SLAB TRACK SYSTEMS [PDF]
The railway slab track has replaced the ballast material in the classical ballasted track with reinforced concrete slab or asphalt layer to cope up with the increasing axle loads, train high-speeds, and to reduce overall maintenance cost. This paper aims
Diab, Muhammad Ahmad +3 more
core
Train‐Induced Concrete Fatigue Damage of CRTS III Slab Ballastless Track
This study explores the fatigue damage of concrete components in the CRTS III slab ballastless track under repeated high‐speed train loading. A stochastic damage‐based computational framework is developed and implemented in a finite element track model ...
Yude Xu, Daobin Yan
core +1 more source
Advanced Science, EarlyView.A Pt/TaOx/V single‐spike TTFS encoder achieves ultralow‐voltage (∼0.35 V), high‐speed (∼100 ns) operation with simplified circuitry. Integrating bipolar nonuniform temporal encoding with a spiking‐DFT neuron model enables a neuromorphic FFT framework. Device‐calibrated simulations demonstrate high spectral fidelity across multitone, speech, and chirp ...
Yang Wu +10 more
wiley +1 more source
Vibration Characteristics and Effectiveness of Floating Slab Track System
Journal of Computers, 2009 Ground-borne vibration excited by metro traffic is becoming a more and more important problem for the rapidly developing transport system in urban areas and increasing public concern about environmental problems. In order to attenuate the vibration influence down to an acceptable level, floating slab track have been applied worldwide on metro line.
Jun Yuan, Yongchao Zhu, Minzhe Wu
openaire +2 more sources