نتایج جستجو برای: coefficient of variation cv

تعداد نتایج: 21194327  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1391

چکیده بهبود برآوردگرهای پارامترهای جامعه مورد توجه برخی از آماردانان تحت شرایط متفاوت می باشد. در سالهای اخیر لاهیتران و ویجکون)2009) برآورد پارامترهای جامعه را زمانیکه اطلاعات اضافی در دسترس باشد بهبود دادند و روش تعمیم یافته ای را برای بدست آوردن برآوردگرهای انقباضی بهینه معرفی کردند. ما می خواهیم براساس قضایایی که لاهیتران و ویجکون مطرح کردند برآوردگرهای انقباضی را برای پارامترهای میانگی...

Journal: Iranian Economic Review 2019

R egional unbalanced growth and the factors affecting it are one of the most important economic issues in developing countries. In this research, after evaluating the regional inequality at the provincial level of Iran, in order to examine the effect of economic factors on it, it was considered as a spatial econometric model using panel data during the period of 2001 to 2015. The evaluatio...

Journal: :Journal of insurance medicine 2004
Abdelouahed Naslafkih Nandini Dendukuri James M Brophy François Sestier

OBJECTIVES The objective is to assess the impact of geographical variations in mortality on risk selection in patients after acute myocardial infarction. METHOD Mortality analysis is used with an actuarial methodology applied to follow-up studies based on data from randomized clinical trial and observational cohort studies of acute myocardial infarction patients from different geographic area...

Journal: :Aging clinical and experimental research 2005
Sylvia Reland Nathalie S Ville Sara Wong Guy Carrault François Carré

BACKGROUND AND AIMS In the older population, the reliability of heart rate variability (HRV) has only been evaluated in a few studies, in the supine position, and covering a broad sample of age and patients of both sexes. To document the relevance of using HRV analysis in healthy older women, the aim of this study was to evaluate the reliability of HRV indexes during three classical tests. ME...

Hossein Ayatollahi, Nema Mohammadian Roshan Tayyebeh Kianoush

Background and Objective: Quality control is one of the most important components in order to improve quality assurance in laboratories during analytical steps. For this purpose, coefficient of variation plays an important role. Due to the fast improvement in technology, application of inferential statistics for the comparisons ...

Journal: :Journal of virological methods 2004
Matthew K O'Shea Patricia A Cane

Molecular beacons are a novel class of oligonucleotide probe capable of reporting the accumulation of target amplicon during real-time PCR by the emission of a fluorescent signal. A novel assay for the detection and estimation of respiratory syncytial virus (RSV) nucleic acid in clinical specimens based on real-time PCR utilising such a probe was developed. The probe consisted of two short arm ...

Journal: :iranian journal of microbiology 0
neda saffari department of biotechnology, faculty of biological sciences, alzahra university, tehran, ir iran siavosh salmanzadeh-ahrabi ahya abdi-ali mohsen rezaei-hemami

background and objectives: antibacterial susceptibility testing of clinical bacterial isolates through disk diffusion method plays a major role in antibacterial treatment. one of the main factors affecting the result of these tests is the type, structure and quality of the disks. the main objective of this study was to compare the agreement of antibiotic disks originated from three companies on...

2016
Petra Hnilicová Michal Považan Bernhard Strasser Ovidiu C Andronesi Martin Gajdošík Ulrike Dydak Jozef Ukropec Dušan Dobrota Siegfried Trattnig Wolfgang Bogner

The reproducibility of gamma-aminobutyric acid (GABA) quantification results, obtained with MRSI, was determined on a 3 T MR scanner in healthy adults. In this study, a spiral-encoded, GABA-edited, MEGA-LASER MRSI sequence with real-time motion-scanner-instability corrections was applied for robust 3D mapping of neurotransmitters in the brain. In particular, the GABA+ (i.e. GABA plus macromolec...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1370

the subjects of the study are only the tefl teachers and students at gilan university. to obtain the desired data, a questionnaire which was based on the theories and disecussions gathered, was used as the main data gathering instrument. to determine the degree of relationship between variables, covariance and pearson product moment correlation coefficient were the formulas applied. the data we...

2016
T. Lyytinen T. Bragge M. Hakkarainen T. Liikavainio P.A. Karjalainen J.P. Arokoski

OBJECTIVES To determine the repeatability of knee joint impulsive loading measurements with skin-mounted accelerometers (SMAs) and lower limb surface electromyography (EMG) recordings during gait. METHODS Triaxial SMA and EMG from 4 muscles during level and stair walking in nine healthy and nine knee osteoarthritis (OA) subjects were used. The initial peak acceleration (IPA), root mean square...

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