Results 131 to 140 of about 94,810 (281)

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source

Unraveling MXene Oxidation Mechanisms Under Realistic Gas Environments by In Situ Gas‐Cell TEM

Advanced Functional Materials, EarlyView.
Real‐time visualization of MXene degradation reveals a fundamental oxidation mechanism under oxygen and moisture environments. Using in situ gas‐cell electron microscopy, this study demonstrates that oxygen degradation drives a thermodynamically controlled high‐temperature transformation into mixed rutile/anatase phases.
Yongfa Cheng, Kunmo Koo, Zizhen Cai, Paty Meza, Yu Wen, Byungseok Seo, Yukun Liu, Xiaobing Hu, Vinayak P. Dravid   +8 more
wiley   +1 more source

A Bayesian model to assess rail track geometry degradation through its life-cycle

, 2012
One of the major drawbacks in rail track investments is the high level of uncertainty in maintenance, renewal and unavailability costs for the Infrastructure Managers (IM) during the life-cycle of the infrastructure.
Teixeira, Paulo Fonseca, Andrade, António Ramos   +1 more
core   +1 more source

Magnetic‐Field Control of Surface States in CoFe2O4 Thin Films for Nitrate Electroreduction to Ammonia

Advanced Functional Materials, EarlyView.
Magnetic‐field‐assisted CVD of heterometallic single‐source precursors modulates thin‐film surface electronic structure and interfacial charge transfer. Field‐grown (Cobalt ferrite‐1T)CF‐1T films exhibit stabilized electronic states, lower kinetic barriers, and markedly enhanced nitrate‐to‐ammonia electrocatalysis versus (Cobalt ferrite‐0T) CF‐0T ...
Touraj Karimpour, Younes Mousazade, Simon Diel, Shilendra Kumar Sharma, Tisita Das, Nathália C. Verissimo, Thomas Fischer, Ziyaad Aytuna, Andreas Lichtenberg, Sudip Chakraborty, Marcel Risch, Sanjay Mathur   +11 more
wiley   +1 more source

Reliability analysis-based life cycle assessment of railway components using long-term maintenance data

Developments in the Built Environment
This study proposes a framework to evaluate the reliability of rail operation times and optimal maintenance intervals for sleepers and fasteners using a long-term maintenance database in South Korea.
Koochul Ji, Ilyoon Choi, Jongmuk Won
doaj   +1 more source

Application of principal component analysis and artificial neural network in prediction of track geometry degradation

, 2019
Railway track geometry subjects to degradation with age and usage and highly affects track functionality. An accurate prediction of track geometry degradation is essential to enhance the performance of maintenance planning and scheduling.
Ahmadi, Alireza, Nissen, Arne, Khajehei, Hamid, Soleimanmeigouni, Iman, Haddadzade, Mohammad   +4 more
core  

Uncertainty analysis of track degradation at railway turnouts aided by a multi-body simulation software

, 2019
Railway turnouts are elements exposed to an accelerated track degradation when compared to plain line track. The particular and complex wheel/rail contact characteristics in railway turnouts make the contact forces acting on the wheel/rail interface ...
Lau, Albert, Santos, Ilmar, Jacobsen, Frederik, de Miguel, Alejandro   +3 more
core   +1 more source

A Tracking and Mapping Method for Visually-degraded Environment

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Abstract. When exploring uncertain areas, the system usually relies on Simultaneous Localization and Mapping (SLAM) to map the surrounding environment and track the location through the environment. Recent work has shown that the SLAM algorithm can exhibit strong robustness when observing distinctive features.
Y. Guo, Z. Dai, X. Zhu
openaire   +3 more sources

Multimodal Perception and Machine Learning‐Empowered Human Machine Interfaces With Double‐Network Hydrogel Fibers

Advanced Functional Materials, EarlyView.
This work develops polyacrylamide‐alginate (PAM‐Alg) double‐network hydrogel fibers for multimodal perception and intelligent human‐machine interfaces. The covalent‐ionic network provides high strength, toughness, and stable conductivity. Easily woven into wearables and integrated with soft robots, the fibers enable object and temperature recognitions ...
Yujue Yang, Minyu Qiu, Di Tan, Xinlong Liu, Junze Zhang, Ziyu He, Jing Han, Yuanyuan Gao, Zihua Li, Hong Fu, Bingang Xu   +10 more
wiley   +1 more source

Rating of railway track degradation and expected intensity of this degradation

, 2014
Ocena degradacji nawierzchni kolejowej może mieć różny stopień szczegółowości zależny od jej celu. Artykuł przedstawia nową metodę oceny degradacji na długości 1 km toru.
Bałuch, M., Nowosińska, I., Bałuch, H.   +2 more
core