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Shizhao Zhang and Shengchun Piao
In order to analyze the frequency periodicity characteristics of acoustic field interference and realize acoustic source ranging (ASR), the normal mode model is used to analyze the interference characteristics of the broadband acoustic field under the co...
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Azharul Karim, M. Masum Billah, M. T. Talukder Newton and M. Mustafizur Rahman
A numerical study of the unsteady mixed convection heat transfer characteristics of an Ag?water nanofluid confined within a square shape lid-driven cavity has been carried out. The Galerkin weighted residual of the finite element method has been employed...
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Alan F. Smeaton and Feiyan Hu
Periodic phenomena are oscillating signals found in many naturally occurring time series. A periodogram can be used to measure the intensities of oscillations at different frequencies over an entire time series, but sometimes, we are interested in measur...
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Feng Zhang, Hao Tang, Nyatchouba Nsangue Bruno Thierry, Wei Liu, Qiuyang Sun, Meixi Zhu, Can Zhang, Xuhao Guo, Chenxu Shan, Liuxiong Xu and Fuxiang Hu
Codends are the posterior components of trawl nets that collect the catch and play a crucial role in the selectivity process. Due to the accumulation of catch and the variety of catch types, the quality of catch and trawl selectivity can be negatively im...
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Jinxiang Xi, Mohamed Talaat, Xiuhua Si and Haibo Dong
Glottal vibration is fundamental to breathing-related disorders and respiratory sound generation. However, responses of the flow and acoustics to glottal vibrations of different frequencies are unclear. The objective of this study is to numerically evalu...
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Tiezhi Sun, Xiaoshi Zhang, Jianyu Zhang and Cong Wang
High-speed underwater vehicles are subjected to complex multiphase turbulent processes, such as the growth, development, shedding, and collapse of cavitation bubbles. To study the cavity evolution and pressure pulsation characteristics, in this paper, cl...
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Yangshou Xiong, Kang Huang, Fengwei Xu, Yong Yi, Meng Sang and Hua Zhai
In light of ignoring the effect of backlash on mesh stiffness in existing gear dynamic theory, a precise profile equation was established based on the generating processing principle. An improved potential energy method was proposed to calculate the mesh...
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Andrzej Walega, Dariusz Mlynski, Andrzej Bogdal and Tomasz Kowalik
The paper presents an analysis of the course and frequency of high water stages in selected catchments of the upper Vistula basin in the south of Poland. The following rivers were investigated: the Dunajec?Nowy Targ-Kowaniec cross-section, the Rudawa?Bal...
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Andrzej Walega, Dariusz Mlynski, Andrzej Bogdal and Tomasz Kowalik
Pág. 1 - 15
The paper presents an analysis of the course and frequency of high water stages in selected catchments of the upper Vistula basin in the south of Poland. The following rivers were investigated: the Dunajec?Nowy Targ-Kowaniec cross-section, the Rudawa?Bal...
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Soojeong Lee, Hyeonjoon Moon, Chang-Hwan Son and Gangseong Lee
Various machine learning models have been used in the biomedical engineering field, but only a small number of studies have been conducted on respiratory rate estimation. Unlike ensemble models using simple averages of basic learners such as bagging, ran...
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Gabriel Constantino Blain
Pág. 557 - 564
The extreme rainfall events have received especial focus in the climate literature due to their potential for causing soil erosion, runoff and, soil water saturation. Thus, the aims of the study were (i) to evaluate the presence of trends, temporal persi...
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B. MENDOZA,D. MARAVILLA,E. JÁUREGUI
Three minimum extreme temperature series from meteorological stations located in or near the Mexican Pacific coast, Acapulco, Comitán and Manzanillo, are spectrally analyzed. The series cover a period from 1941 to 1981. The sp...
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Eric Hsueh-Chan Lu and You-Ru Lin
With the rise in the Internet of Things (IOT), mobile devices and Location-Based Social Network (LBSN), abundant trajectory data have made research on location prediction more popular. The check-in data shared through LBSN hide information related to lif...
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Alexander P. Graziano, R. Christian Jones
Pág. 1 - 21
Water quality patterns in two adjacent embayments of the tidal freshwater Potomac River were compared using continuously monitored data. The two embayments, the tidal Occoquan and Gunston Cove, are shallow embayments fed by tributaries which vary in thei...
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Alexander P. Graziano and R. Christian Jones
Water quality patterns in two adjacent embayments of the tidal freshwater Potomac River were compared using continuously monitored data. The two embayments, the tidal Occoquan and Gunston Cove, are shallow embayments fed by tributaries which vary in thei...
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Olga González, Gladys Pérez Camargo, Macarena Membiela, Diana Frezza, Norberto Bartoloni, Carlos Vieites
Pág. 123 - 130
In this study, adult Helix apersa land snails with previously established periodicity were observed at three densities in their fi nishing stage in order to contribute to the body of knowledge about spatial distribution and certa...
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