Results 31 to 40 of about 6,670,598 (322)
Applied Sciences, 2023 In this study, we analyze the quality factor- Q derived from the Vertical Seismic Profiling (VSP) and sonic log data that was performed in the DS-2 borehole located in the Carpathian Foredeep.
Artur Piotr Łapinkiewicz +5 more
doaj +1 more source
Controlling the quality factor of a tuning-fork resonance between 9 K and 300 K for scanning-probe microscopy [PDF]
, 2011 We study the dynamic response of a mechanical quartz tuning fork in the temperature range from 9 K to 300 K. Since the quality factor Q of the resonance strongly depends on temperature, we implement a procedure to control the quality factor of the ...
+12 more
core +6 more sources
Journal of Nuclear Engineering, 2023 Quality and safety are intensely related and go hand in hand. Quality of the safety-grade equipment is very important for the safety of a nuclear power plant (NPP) and achieving production goals.
Mohammad Khalaquzzaman +2 more
doaj +1 more source
GO/C2S Nanocomposite as an Environmentally-Friendly Material for sustainable Development of Cement Structure [PDF]
Journal of Water and Environmental Nanotechnology, 2018 In the present work, Graphene Oxide (GO) nano particles with 0.1, 0.2, 0.4 and 0.8 weight percentages (wt.% ), synthesized by Hummer method entered into the Di-Calcium Silicate (C2S) matrix (synthesized with using Pechini method and their nano structural
Ali Bahari, Hussein Salmani
doaj +1 more source
Integrated Resonant Micro/Nano Gravimetric Sensors for Bio/Chemical Detection in Air and Liquid
Micromachines, 2021 Resonant micro/nanoelectromechanical systems (MEMS/NEMS) with on-chip integrated excitation and readout components, exhibit exquisite gravimetric sensitivities which have greatly advanced the bio/chemical sensor technologies in the past two decades. This
Hao Jia, Pengcheng Xu, Xinxin Li
doaj +1 more source
Nanotube mechanical resonators with quality factors of up to 5 million [PDF]
Nature Nanotechnology 9, 1007 (2014), 2015 Carbon nanotube mechanical resonators have attracted considerable interest because of their small mass, the high quality of their surface, and the pristine electronic states they host. However, their small dimensions result in fragile vibrational states that are difficult to measure. Here we observe quality factors $Q$ as high as $5\times10^6$ in ultra-
arxiv +1 more source
Temperature Stable, High-Quality Factor Li2TiO3-Li4NbO4F Microwave Dielectric Ceramics
Crystals, 2021 In this work, (1-x)Li2TiO3-xLi4NbO4F ceramics were prepared by the conventional solid-state ceramic route. With the increase of Li4NbO4F content, the phase structure transformed from ordered monoclinic to disordered cubic. By increasing Li3NbO4F content,
Shangrui Xu +6 more
doaj +1 more source
Entropy, 2011 The classical information-theoretic measures such as the entropy and the mutual information (MI) are widely applicable to many areas in science and engineering. Csiszar generalized the entropy and the MI by using the convex functions.
Kazuyuki Aihara, Yang Chen
doaj +1 more source
Измерение, мониторинг, управление, контроль, 2022 Background. The purpose of the study is to develop tools to measure parameters of piezomaterial products represented by four-element resonant equivalent circuits. Materials and methods.
A.V. Svetlov, Ngok Man' Nguen
doaj +1 more source
Automatic Marine Sub-Bottom Sediment Classification Using Feature Clustering and Quality Factor
Journal of Marine Science and Engineering, 2023 It has been proven that the quality factor (Q) is important for marine sediment attenuation attribute representation and is helpful for sediment classification.
Zaixiang Zong +3 more
doaj +1 more source