نتایج جستجو برای: environmental coefficient of variation

تعداد نتایج: 21221059  

2011

Description This function calculates the coefficient of variation for each gene in the qPCR experiment, and returns the average coefficient of variation across all genes.

Journal: :Computational Statistics & Data Analysis 2006
Douglas G. Bonett

An approximate confidence interval is proposed for a robust measure of relative dispersion—the coefficient of quartile variation. The proposed method provides an alternative to interval estimates for other measures of relative dispersion. © 2005 Elsevier B.V. All rights reserved.

Journal: :Remote Sensing 2011
Jahan Kariyeva Willem J. D. van Leeuwen

Through the application and use of geospatial data, this study aimed to detect and characterize some of the key environmental drivers contributing to landscape-scale vegetation response patterns in Central Asia. The objectives of the study were to identify the variables driving the year-to-year vegetation dynamics in three regional landscapes (desert, steppe, and mountainous); and to determine ...

Journal: :تحقیقات آب و خاک ایران 0
غزاله ضیایی کارشناس ارشد آبیاری و زهکشی فریبرز عباسی موسسه تحقیقات فنی و مهندسی کشاورزی حسین بابازاده دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران فریدون کاوه دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران

recognition of soil water infiltration process is essential for improving irrigation efficiency, decreasing water losses and management of surface runoff. the aim of this research was to evaluate temporal variation of the kostiakove-louise infiltration coefficient parameters during a corn growing season. in this research, 16 irrigation events for 8 large scale furrow experiments were analyzed b...

Journal: :Indian journal of experimental biology 2003
Susamma Chacko D Kumar Megha Singh

A procedure for non-invasive imaging of the optical attenuation coefficient variation of in vivo thick organs/tissues is developed. The laser back-scattered surface profiles at various locations of human forearm, by multi-probe reflectometer, are measured. These profiles are matched by iterative procedure, with that as obtained by Monte Carlo simulation and the corresponding values of attenuati...

Journal: :علوم دامی ایران 0
مسلم بیگی دانشجوی کارشناسی ارشد دانشگاه آزاد اسلامی واحد شهرکرد محمود وطن خواه دانشیار مرکز تحقیقات کشاورزی و منابع طبیعی شهرکرد مصطفی فغانی استادیار دانشگاه آزاد اسلامی واحد شهرکرد

in this study, the number of 1802 longevity records of ewes collected during 1989 to 2010 in breeding station of lori-bakhtiari sheep flocks were used to estimate of genetic, environmental and phenotypic trends for economic lifetime. the breeding values of a ewe’s lifetime were estimated by restricted maximum likelihood procedure under an animal model of univariate analysis. the best linear unb...

2007
Holger Dette Mareen Marchlewski

In the common nonparametric regression model Yi = m(Xi) + σ(Xi) i we consider the problem of testing the hypothesis that the coefficient of the scale and location function is constant. The test is based on a comparison of the observations Yi/σ̂(Xi) with their mean by a smoothed empirical process, where σ̂ denotes the local linear estimate of the scale function. We show weak convergence of a cente...

2010

Description This function calculates the coefficient of variation for each gene in the qPCR experiment, and returns the average coefficient of variation across all genes.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم تربیتی و روانشناسی 1388

چکیده هدف اصلی این پژوهش شناسایی الزامات نظام مدیریت کیفیت فراگیر در حوزه پژوهشی دانشگاه اصفهان بود. سوالهای پژوهش با توجه به مولفه های مدیریت کیفیت (تعهد مدیران، بهبود مستمر فرایندها ، مشتری محوری ، منابع انسانی ، مدیریت اطلاعات ، زیرساختهای کیفیت ، استفاده از نتایج ، انعطاف پذیری، مشارکت در فعالیتهای پژوهشی، ایجاد فرهنگ کیفیت و تناسب ساختارهای سازمانی) که بر اساس مطالعه استانداردهای بین المل...

ژورنال: اعتیاد پژوهی 2020

Objective: The aim of this study was to investigate the structural model of the role of environmental and family factors in the developmental prevention of the tendency to use drugs and psychotropic substances. Method: The research was descriptive-correlational. The statistical population of the study included Children and adolescents in Karaj who had used drugs or psychotropic substances at le...

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