نتایج جستجو برای: pressure transient analysis

تعداد نتایج: 3250066  

Journal: :energy equipment and systems 2015
edris bagheri amir nejat

this study investigated the performance and aeroelastic characteristics of a wind turbine blade based on strongly coupled approach (two-way fluid structure interaction) to simulate the transient fsi1 responses of hawt2. aerodynamic response was obtained by 3d cfd-urans approach and structural response was obtained by 3d finite element method. aeroelastic responses of the blade were obtained by ...

Journal: :iranian red crescent medical journal 0
mohammad gholami fesharaki biostatistics department, faculty of medical sciences, tarbiat modares university, tehran, ir iran anoshirvan kazemnejad biostatistics department, faculty of medical sciences, tarbiat modares university, tehran, ir iran; biostatistics department, faculty of medical sciences, tarbiat modares university, tehran, ir iran. tel: +98-2182883875, fax: +98-2182884524 farid zayeri proteomics research center, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, ir iran javad sanati occupational health center, polyacryle company, tehran, ir iran hamed akbari health research center, baqiyatallah university of medical sciences, tehran, ir iran

conclusions treating obesity, increasing physical activity and quality of married life are proposed as practical solutions to reduce bp. background hypertension is considered as a major public health problem in most countries due to its association with ischemic heart disease which causes cerebrovascular disease and death. objectives the purpose of the present study was to study factors affecti...

Journal: :Journal of applied physiology 2014
Y C Tzeng B A MacRae P N Ainslie G S H Chan

Cerebral blood flow responses to transient blood pressure challenges are frequently attributed to cerebral autoregulation (CA), yet accumulating evidence indicates vascular properties like compliance are also influential. We hypothesized that middle cerebral blood velocity (MCAv) dynamics during or following a transient blood pressure perturbation can be accurately explained by the windkessel m...

Journal: :journal of chemical and petroleum engineering 2012
azim kalantari asl hamid reza nasriani mohammad hosein zareenejad

decline curve analysis has some advantages over transient well test analysis in which it is not required to shut-in the well and also wellbore storage effects do not exist. few studies have been done on decline curve analysis of naturally fractured reservoirs but there are even some limitations with available models. on the other hand well test could be expensive and in some operational conditi...

Journal: :Signal Processing Systems 2013
Seshan Srirangarajan Michael Allen Ami Preis Mudasser Iqbal Hock-Beng Lim Andrew Whittle

In this paper we present techniques for detecting and locating transient pipe burst events in water distribution systems. The proposed method uses multiscale wavelet analysis of high rate pressure data recorded to detect transient events. Both wavelet coefficients and Lipschitz exponents provide additional information about the nature of the signal feature detected and can be used for feature c...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2011
a. r. shahani* h. esmaili a. aryaei s. mohammadi m. najar

in this paper, the dynamic simulation for a high pressure regulator is performed to obtain the regulator behavior. to analyze the regulator performance, the equation of motion for inner parts, the continuity equation for diverse chambers and the equation for mass flow rate were derived. because of nonlinearity and coupling, these equations are solved using numerical methods and the results are ...

Journal: :Journal of the Japanese Association for Petroleum Technology 2007

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