Results 11 to 20 of about 24,420 (158)

Advances in Triboelectric Nanogenerators With Rotating Structure

Carbon Energy, EarlyView.
The rotating TENG has been widely studied for its superiorities of simple structure, high efficiency, and stable output. This review introduced the four different principles of rotating TENG and offered a thorough summary for performance and application research through three‐level classification. Importantly, the current existing problems, challenges,
Chuguo Zhang, Chunxu Xue, Yutong Chen, Yujie Qiang, Seeram Ramakrishna   +4 more
wiley   +1 more source

Visual Localization Method for Fastener-Nut Disassembly and Assembly Robot Based on Improved Canny and HOG-SED

Applied Sciences
Visual positioning accuracy is crucial for ensuring the successful execution of nut disassembly and assembly tasks by a fastener-nut disassembly and assembly robot.
Xiangang Cao, Mengzhen Zuo, Guoyin Chen, Xudong Wu, Peng Wang, Yizhe Liu   +5 more
doaj   +1 more source

Dynamics of active filaments in porous media

, 2019
The motion of active polymers in a porous medium is shown to depend critically on flexibilty, activity and degree of polymerization. For given Peclet number, we observe a transition from localisation to diffusion as the stiffness of the chains is ...
Mokhtari, Zahra, Zippelius, Annette
core   +1 more source

Observational evidence for self-interacting cold dark matter [PDF]

, 2000
Cosmological models with cold dark matter composed of weakly interacting particles predict overly dense cores in the centers of galaxies and clusters and an overly large number of halos within the Local Group compared to actual observations.
A. A. de Laix, A. A. Klypin, A. Dekel, A. Kusenko, B. Moore, B. Moore, B. Moore, B.-A. Gradwohl, C. W. Stubbs, David N. Spergel, E. D. Carlson, G. Dvali, G. Dvali, G. Kauffmann, G. Quinlan, G. Starkman, G. Toth, J. A. Tyson, J. Dalcanton, J. Dalcanton, J. Dalcanton, J. F. Navarro, J. Goodman, J. J. Mohr, J. V. Kepner, L. Blitz, M. E. Machacek, M. M. MacLow, M. Mateo, M. Weinberg, M. Zwann, N. Bahcall, P. D. Sackett, Paul J. Steinhardt, R. A. C. Croft, R. A. Flores, R. Bernabei, R. Schaeffer, V. P. Debattista, W. H. Press, W. J. G. De Blok   +40 more
core   +2 more sources

Exploring Solar Thermal Collector Technologies: Efficiency, Performance, and Advanced Concentration Strategies

Energy Science &Engineering, EarlyView.
ABSTRACT Solar thermal collector technology is crucial for capturing renewable energy to support sustainable thermal uses. Nonetheless, traditional designs frequently experience optical losses, ineffective thermal storage and variable performance under different levels of sunlight.
R. Iyankumar, Arun Prasad Murali, Abdellaif M. Sadeq, Mohamed Iqbal Shajahan, Karuppaiah Selvakumar, Karthik V. Shankar, Jayant Giri, Hassen Sabeur   +7 more
wiley   +1 more source

Interaction Between Vortex‐Induced Vibrations and Base Vibrations in Piezoelectric Harvesters

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In the present era, powering sensors using green energy is a significant challenge. One promising solution for the power supply of small sensors relies on piezoelectric energy harvesters excited by vortex‐induced vibrations (VIVs) generated by wind.
Michele Tonan, Ilaria Palomba, Alberto Pasetto, Alberto Doria   +3 more
wiley   +1 more source

New silicon photonics integration platform enabled by novel micron-scale bends

, 2013
Even though submicron silicon waveguides have been proposed for dense integration of photonic devices, to date the lightwave circuits on the market mainly rely on waveguides with micron-scale core dimensions.
Aalto, Timo, Cherchi, Matteo, Harjanne, Mikko, Kapulainen, Markku, Ylinen, Sami   +4 more
core   +1 more source

Improvement of Mechanical Performance of Large Capacity Dry‐Type On‐Board Traction Transformer Under Short‐Circuit Electromagnetic Force

High Voltage, EarlyView.
ABSTRACT The application of dry‐type on‐board traction transformers (D‐OBTTs) aims to achieve lightweight electric multiple units (EMUs) and support the approach for carbon neutrality. However, the production of large capacity D‐OBTTs are limited due to the defects in insulation materials under the impact of short‐circuit electromagnetic force.
Woyang Li, Dongyang Wang, Yingyi Xia, Tiandong Chen, Lijun Zhou, Qian Lei, Yunyun Qian   +6 more
wiley   +1 more source

Novel Inverter‐Fed Motor Drive System With Common‐Mode Voltage Suppression and End‐Surge Slew Rate Suppression Function

High Voltage, EarlyView.
ABSTRACT Electric locomotives on the horizon will integrate SiC inverters, promising quicker switching and lower losses than traditional setups. However, in addition to the steep rising edge, the inverter‐fed motor drive system faces challenges such as high common‐mode voltage (CMV) and high motor terminal surge voltage swing rate (dv/dt).
Bo Gao, Shunan Yuan, Binglei Cao, Kai Liu, Guangning Wu   +4 more
wiley   +1 more source

Bridging the Late Antique Gap in Northwest Arabia: New Archaeological Evidence on the Occupation of Wādī al‐Qurā (al‐ʿUlā [AlUla], Saudi Arabia) Between the Third and Seventh Centuries CE

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT In 2019, the Dadan Archaeological Project (CNRS/RCU/AFALULA) identified a Late Antique village 1 km south of ancient Dadan in the al‐ʿUlā valley (northwest Saudi Arabia). Three excavation seasons at this site (2021–2023) have uncovered a massive building constructed in the late third or early fourth cent.
Jérôme Rohmer, Abdulrahman Alsuhaibani, Charlène Bouchaud, Elora Chambraud, Vladimir Dabrowski, Hatem Djerbi, Fabien Lesguer, Hervé Monchot, Paul Picavet, Louise Purdue, Bertrand Riba, Shadi Shabo   +11 more
wiley   +1 more source