A tool for deriving camera spatial frequency response from natural scenes (NS-SFR) [PDF]
, 2023 Recent research on digital camera performance evaluation introduced the Natural Scene Spatial Frequency Response (NS-SFR) framework, shown to provide a comparable measure to the ISO12233 edge SFR (e-SFR) but derived outside laboratory conditions.
Triantaphillidou, S. +2 more
core +1 more source
Sensors, 2021 The role and importance of geodesists in the planning and building of civil engineering constructions are well known. However, the importance and benefits of collected data during maintenance in exploitation have arisen in the last thirty years due ...
Rinaldo Paar +3 more
doaj +1 more source
Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies
Micromachines, 2022 Filling microstructures in the air with liquid or removing trapped gases from a surface in a liquid are required in processes such as cleaning, bonding, and painting.
Yuta Matsumoto +2 more
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Variation in the natural frequency of stamens in six morphologically diverse, buzz-pollinated, heterantherous Solanum taxa and its relationship to bee vibrations [PDF]
, 2020 During buzz pollination, bees use vibrations to remove pollen from flowers. Vibrations at the natural frequency of pollen-carrying stamens are amplified through resonance, resulting in higher amplitude vibrations.
Vallejo‐Marín, Mario +6 more
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Experimental study and numerical modeling of vibrational characteristics of a 500W PEM fuel cell stack [PDF]
Hydrogen, Fuel Cell & Energy Storage, 2022 A PEM fuel cell is considered a system with a complex mechanical structure due to a large number of components with different dimensions and materials. Understanding this structure is essential to design fuel cells against dynamic loads such as shock and
mohammad Mohammadi* +2 more
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Investigation Into the Galloping Characteristics of Multispan Iced Covered Conductors
IEEE Access, 2022 A full multispan two-degree-of-freedom (2-DOF) iced covered transmission line model is presented. Taking multispan conductors as the research object, based on the Hamiltonian principle, a nonlinear galloping model of multispan conductors considering the ...
Jia-Yan Zheng +2 more
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Time-Frequency Analysis of Systems with Changing Dynamic Properties [PDF]
, 2006 The Wigner-Ville Distribution, and related refinements, represent a class of advanced time-frequency analysis tools that are distinguished from Fourier and wavelet methods by an increase in resolution in the time frequency plane. Time-frequency analysis
Bradford, Samuel Case, V +1 more
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Estimation of ISO12233 Edge Spatial Frequency Response from Natural Scene Derived Step-Edge Data
, 2021 The Natural Scene derived Spatial Frequency Response (NS-SFR) is a novel camera system performance measure that derives SFRs directly from images of natural scenes and processes them using ISO12233 edge-based SFR (e-SFR) algorithm.
Jenkin, Robin B. +3 more
core +1 more source
Natural frequency analysis of cracked beam
Vietnam Journal of Mechanics, 1997 The model of cracked one-dimensional structure has been treated as two uniform beams connected by an equivalent rotation spring at the crack location.
Nguyen Tien Khiem, Dao Nhu Mai
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Buildings, 2021 Historic buildings have a high architectural value and their maintenance, repair and rehabilitation require a special approach. This approach is mainly based on the buildings’ performance under non-destructive tests such as operational modal analysis ...
Suzana Ereiz +3 more
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