نتایج جستجو برای: li

تعداد نتایج: 44020  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم ریاضی 1388

همانطور که می دانیم بررسی پایداری سیستم های برق بسیار مفید است . معادله دیفرانسیل یک مدل بسیار مناسب برای سایر علوم از قبیل سیستم های برق فراهم می کند . همچنین نظریه انشعاب یک ابزار برای آنالیز کردن سیستم های پارامتری غیرخطی است . این نظریه به بررسی تغییرات یک سیستم پارامتری می پردازد . در این پایان نامه یک سیستم گاورنر وات به همراه یک فنر که یک سیستم کنترلی است مورد بررسی قرار می گیرد . تحلی...

ژورنال: علوم آب و خاک 2014

Shahrekord groundwater is the main source of water for drinking, and the agricultural and industrial activities of its inhabitants. Water quality measures of scaling and corrosion can deteriorate steel-based systems used for storage or supplying water for drinking and to industry and irrigation. The main aim of this study was to assess the spatial variability and mapping of scaling and corro...

Journal: :journal of current ophthalmology 0
ساسان مقیمی sasan moghimi سامان کیومهر saman kiumehr جواد عموزاده javad amoozadeh قاسم فخرائی ghasem fakhraie

purpose : to compare laser interferometry (li) and ultrasound a-scan in measurement of axial length ( al ) in eyes with asteroid hyalosis methods : twenty three patients with unilateral moderate to severe asteroid hyalosis determined by b-scan ultrasonography images participated in the study. the al measurements were obtained by li and ultrasound a-scan in both asteroid hyalosis and noninvolved...

Journal: :Physical review letters 2002
Robert V Harlander William B Kilgore

The Higgs-boson production cross section at pp and pp colliders is calculated in QCD at next-to-next-to-leading order (NNLO). We find that the perturbative expansion of the production cross section is well behaved and that scale dependence is reduced relative to the NLO result. These findings give us confidence in the reliability of the prediction. We also report an error in the NNLO correction...

1998
Martin Lemoine Roger Ferlet

We discuss the observational status of the interstellar lithium isotopic ratio and its significance with respect to the galactic evolution of lithium. Based on invited talks given at: ESO/EIPC Workshop on “Light Elements Abundances”, Isola d’Elba, Italy, May 22–28, 1994 ESO Workshop on “Science with the VLT”, Garching, Germany, June 28 – July 01, 1994 IAU General Assembly, Joint Discussion 11, ...

2013
Xiangyu CAO Baomin LI Sheng LI Jun WANG Xinfeng LIU Weiping LI

Intestinal bacteria play a key role to change the properties of drugs or herbal components, including therapeutic role, toxicity and pharmacokinetic behaviour. The present study aims to investigate the role of intestinal bacteria in changing the inhibitory potential of herbal components towards drug-metabolizing enzymes (DMEs) through comparing the inhibition of UDP-glucuronosyltransferase (UGT...

Journal: :Physical review. D, Particles and fields 1994
Vogt Jacak McGaughey Ruuskanen

It has been predicted that dilepton production may be used as a quark-gluon plasma probe. We calculate the rapidity distributions of thermal dileptons produced by an evolving quark-gluon plasma assuming a longitudinal scaling expansion with initial conditions locally determined from the hadronic rapidity density. These distributions are compared with Drell-Yan production and semileptonic charm ...

1998
J. I. Davies S. Phillipps J. B. Jones R. M. Smith W. J. Couch

Recent studies have demonstrated that many galaxy clusters have luminosity functions (LFs) which are steep at the faint end. However, it is equally clear that not all clusters have identical LFs. In this paper we explore whether the variation in LF shape correlates with other cluster or environmental properties.

M.K. Amini Mojtaba Shamsipur,

Complexes of benzo-15-crown-5 macrocycle with Li+ and Cs+ ions were investigated by 7Li and 133Cs NMr in a number of nonoqueous solutions. The resulting 1:1 complex with Li+ ion was found to be much more stable than that with Cs+ ion. With the exception of pyridine solutions the stabilities of the complexes varied inversely w...

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