Results 31 to 40 of about 1,208,920 (250)

Acceleration in turbulent channel flow

open access: yes, 2010
We use Direct Numerical Simulations of turbulent channel flow to study the acceleration A corresponding to the full fluid velocity u and the acceleration a corresponding to the fluctuating velocity u? ? u?hui where hui is the mean flow.
S. W. Coleman   +7 more
core   +1 more source

Seismic Microzonation of Tehran based on deterministic seismic hazard analysis and seismic indexes around faults [PDF]

open access: yesJournal of Structural and Construction Engineering, 2017
Tehran has situated over several active faults such as Mosha, North Tehran, North Ray and South Ray faults and has experienced strong earthquakes in its history.
Hamid Saffari   +1 more
doaj   +1 more source

Spectral Acceleration and Pseudo-spectral acceleration proximity

open access: yes, 2008
This paper deals with the deterministic relationship between spectral and pseudo-spectral acceleration, SA(csi,omega0) and PSA(csi,omega0) respectively, and gives the reason for their proximity on theoretical basis.
MENTRASTI, LANDO
core   +1 more source

Site Coefficient and Design Spectral Acceleration Evaluation of New Indonesian 2019 Website Response Spectra

open access: yesInternational Journal of Technology, 2022
Calculation of site coefficient and design response spectral acceleration are two important steps in the seismic design of buildings. According to Indonesian Seismic Code 2019, two information requirements for site coefficient calculations are the ...
Windu Partono   +4 more
doaj   +1 more source

Spectral Characteristics of Biological Soil Crusts under the Different Types in the Water-Wind Erosion Crisscross Region on the Loess Plateau

open access: yes, 2018
The study on spectral characteristics of biological soil crust in the water-wind erosion crisscross region in the Loess Plateau has important scientific value for the identification of biological soil crust based on remote sensing technology at regional ...
Sun, WY (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.   +7 more
core   +1 more source

基于KiK-net强震动记录的加速度反应谱规律性偏差

open access: yesDizhen xuebao
地震动特性受到地震震源、地震波传播介质和局部场地条件等因素的综合影响,虽然地震动反应谱虽然具有统计意义上的共性,但其具体形状又各不相同,特别是部分加速度反应谱与统计平均值之间存在显著的规律性偏差。为了进一步探究加速度反应谱与统计平均值之间的规律性偏差,本文基于日本KiK-net台网获取的8万余条强震动记录,建立了考虑地震震级和震中距影响的地面峰值加速度归一化加速度反应谱,并以预测值+0.5倍方差为界将加速度反应谱分为有、无反应谱规律性偏差的两组。通过有反应谱规律性偏差的反应谱(观测值 ...
Mingming Yuan, Xiaojun Li, Yushi Wang
doaj   +1 more source

Investigating Efficiency of Vector-Valued Intensity Measures in Seismic Demand Assessment of Concrete Dams

open access: yesAdvances in Civil Engineering, 2018
The efficiency of vector-valued intensity measures for predicting the seismic demand in gravity dams is investigated. The Folsom gravity dam-reservoir coupled system is selected and numerically analyzed under a set of two-hundred actual ground motions ...
Mohammad Alembagheri
doaj   +1 more source

Comparative Evaluation of Hemodiafiltration, Hemoperfusion, and Standard Hemodialysis on Efficacy, Inflammatory Control, Dialysis Adequacy, and Safety in End‐Stage Renal Disease: A Prospective Observational Study

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo   +5 more
wiley   +1 more source

Probabilistic Seismic Hazard Assessment of the Southwestern Region of Saudi Arabia

open access: yesApplied Sciences
In relation to its rapid infrastructure expansion, exemplified by projects like the Najran Valley Dam or the rehabilitation of agricultural terraces, Saudi Arabia stands out among the Arabian Gulf nations.
Mohamed Arfa   +4 more
doaj   +1 more source

Vibration Analysis of 5-DOF Vehicle Model under Stochastic Road Surface Excitation

open access: yesMATEC Web of Conferences, 2016
Considering human body vertical motion, vehicle body vertical motion, pitch movement and vertical jump of front and rear wheels, a five-degree-of-freedom vehicle model is established to study basic driving characteristics of the vehicle.
Zhang Yanlong   +3 more
doaj   +1 more source

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