Percussion and PSO-SVM-Based Damage Detection for Refractory Materials
Micromachines, 2023 Refractory materials are basic materials widely used in industrial furnaces and thermal equipment. Their microstructure is similar to that of many heterogeneous high-performance materials used in micro/nanodevices.
Dan Yang +4 more
doaj +1 more source
Time-Frequency Analysis of Clinical Percussion Signals Using Matrix Pencil Method
Journal of Electrical and Computer Engineering, 2015 This paper discusses time-frequency analysis of clinical percussion signals produced by tapping over human chest or abdomen with a neurological hammer and recorded with an air microphone.
Moinuddin Bhuiyan +5 more
doaj +1 more source
Influence of Mechanical Rotary Percussion Tool on Bit Feed Friction of Horizontal Well
Shiyou jixie, 2023 Weight-on-bit(WOB)congestion is one of the main factors restricting the penetration rate of sliding drilling in horizontal wells, and the use of vibration friction reduction tools is the most direct and effective way to reduce friction in horizontal ...
Yan Yan +5 more
doaj
Dynamic Analysis of the Musical Triangles—Experimental and Numerical Approaches
Applied Sciences, 2022 This paper addresses the experimental and numerical dynamic analysis of curved bars used as percussion musical instruments. These structures are known as triangles, being made of various metal materials.
Mariana Domnica Stanciu +5 more
doaj +1 more source
Faunal Assemblages From Lower Bed I (Oldupai Gorge, Tanzania)
Frontiers in Ecology and Evolution, 2022 Palaeobiological and archeological excavations at the site of Ewass Oldupa, found in the western Plio-Pleistocene rift basin of Oldupai Gorge (also Olduvai Gorge), Tanzania, revealed rich fossiliferous levels and the earliest remains of human activity at
Pamela Akuku +12 more
doaj +1 more source
High frequency percussive ventilation in pediatric acute respiratory failure
Pediatric Pulmonology, 2020 AbstractObjectiveHigh frequency percussive ventilation (HFPV) is used in acute respiratory failure, but is poorly described in pediatrics. We aimed to describe the clinical characteristics, ventilator settings, and outcomes of a large pediatric cohort, and to determine predictors of who would benefit from HFPV.HypothesisGas exchange 2 h after HFPV ...
Andrew D. Butler +2 more
openaire +3 more sources
Musical Instrument Identification Based on Improved Convolutional Neural Network and Auditory Spectrum [PDF]
Jisuanji gongcheng, 2019 Aiming at the problem that traditional musical instrument identification depends on feature selection and elementary acoustical feature,a 5-layer Convolutional Neural Network(CNN) extracting high-level time-frequency information of timbre layer by layer ...
WANG Fei,YU Fengqin
doaj +1 more source
Vibration modes and sound characteristic analysis for different sizes of singing bowls
MATEC Web of Conferences, 2018 The singing bowl is used not only for the instrument of Buddhism but also for musical therapy. This work aims to investigate the correlation of vibration modes and percussion sound for singing bowls.
Wang Bor-Tsuen +2 more
doaj +1 more source
Morphofunctional characteristics of single combats athletes as factors of success
Physical Education of Students, 2021 Background and Study Aim. The aim of the article is a comparative analysis of the morphofunctional characteristics of athletes of various types of martial arts as factors of success. Material and Methods.
Leonid V. Podrigalo +8 more
doaj +1 more source
Evaluation and Damping of High-Frequency Vibrations on a Percussive Tool
ICHAV 2023, 2023 Percussive tools can generate high-frequency vibrations that are not taken into account in currently applicable standards. In various publications, it has been suggested that those high-frequency vibrations may cause health issues. In the present study, high-frequency vibrations produced by a chipping hammer are evaluated and used to assess the ...
Romain Haettel, Oscar Lundin
openaire +2 more sources