نتایج جستجو برای: pressure calculation

تعداد نتایج: 504906  

ژورنال: علوم آب و خاک 2007
سید مجید میرلطیفی, , رضا شاه محمدی, , کورش محمدی, ,

A computer model (SprinklerMod) was developed to simulate hydraulics of sprinkler irrigation systems. The objective of this paper is to describe mathematical background of this model for simulating pressures and discharges of sprinklers along the laterals. The model is capable of designing two types of laterals: laterals with fixed sprinklers and laterals with portable sprinklers. The model sho...

سید مجید میرلطیفی, , رضا شاه محمدی, , کورش محمدی, ,

A computer model (SprinklerMod) was developed to simulate hydraulics of sprinkler irrigation systems. The objective of this paper is to describe mathematical background of this model for simulating pressures and discharges of sprinklers along the laterals. The model is capable of designing two types of laterals: laterals with fixed sprinklers and laterals with portable sprinklers. The model sho...

2008
Ulrich Haisch

We present a concise review of the recent theoretical progress concerning the standard model calculation of the inclusive radiative B̄ → Xsγ decay. Particular attention is thereby devoted to the calculations of the next-to-next-to-leading order fixed-order O(αs) contributions, non-local O(αsΛ/mb) power corrections, and logarithmic-enhanced O(αs) cut-effects to the decay rate. The current status ...

1997
A. S. Raskin

The equations of motion for a massive spin2 Rarita-Schwinger field in a finite-range, central, Lorentz scalar potential are developed. It is shown that the resulting density may not be everywhere positive definite.

2003
Zhuo Li Xiang Lu Wangqi Qiu Weiping Shi D. M. H. Walker

Delay faults are an increasingly important test challenge. Traditional open and bridge fault models are incomplete because only the functional fault or a subset of delay fault are modeled. In this paper, we propose a circuit level model for resistive open and bridge faults. All possible fault behaviors are illustrated and a general resistive bridge delay calculation method is proposed. The new ...

Journal: :International angiology : a journal of the International Union of Angiology 2004
P Bouyé J Picquet V Jaquinandi B Enon G Leftheriotis J-L Saumet P Abraham

AIM Although transcutaneous oxygen pressure measurements (tcpO2) are largely used in the investigation of vascular patients, its reproducibility is still debated. Indeed an unpredictable gradient exists between arterial and transcutaneous oxygen pressure. We hypothesised that indices taking into account changes over time and independent of absolute starting values would be more reproducible tha...

1997
I T Drummond R R Horgan

We show that large-N φ theory is not trivial if one accepts the presence of a tachyon with a truly huge mass, and that it allows exact calculation. We use it to illustrate how to calculate the exact resummed pressure at finite temperature and verify that it is infrared and ultraviolet finite even in the zero-mass case. In 3 dimensions a residual effect of the resummed infrared divergences is th...

Journal: :gas processing 0
mohammad hossein heidari sureshjani ior research institute, tehran, iran ahmad lak department of chemical engineering, faculty of petroleum, gas and petrochemical engineering, persian gulf university, bushehr, iran shahriar osfouri department of chemical engineering, faculty of petroleum, gas and petrochemical engineering, persian gulf university, bushehr, iran robab chahshoori department of petroleum engineering, faculty of petroleum,gas and petrochemical engineering, persian gulf university, bushehr, iran reza azin department of petroleum engineering, faculty of petroleum,gas and petrochemical engineering, persian gulf university, bushehr, iran shahab gerami ior research institute, tehran, iran

â understanding the flow behaviour in a gas well is crucial for future production strategies, obtaining bottomhole conditions from wellhead production data, analyzing production data and estimating reservoir properties. in this work, the pressure profile and flow regime are studied on four wells of a multi-well, multi-layer gas-condensate reservoir, producing at high rate. the wells are deviate...

Journal: :Disasters 2006
Reinhard Kaiser Bradley A Woodruff Oleg Bilukha Paul B Spiegel Peter Salama

A good estimate of the design effect is critical for calculating the most efficient sample size for cluster surveys. We reviewed the design effects for seven nutrition and health outcomes from nine population-based cluster surveys conducted in emergency settings. Most of the design effects for outcomes in children, and one-half of the design effects for crude mortality, were below two. A reasse...

1998
Scott Backhaus Richard E. Packard

We present a model calculation and measurements of the acoustic radiation spectrum generated by thermally activated phase slippage driven by a constant pressure head. The calculation of the spectrum, which is similar to that for shot noise in an electrical current, takes into account the stochastic nature of phase-slip vortex nucleation. The observed acoustic amplitude depends on the driving pr...

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