نتایج جستجو برای: stratified random sampling method was used

تعداد نتایج: 5979659  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زبانهای خارجی 1393

the purpose of this study was to examine the english language needs of medical students at tehran university of medical sciences . analysis of the needs took place for three groups: 320 undergraduate students, 30 postgraduate students and 20 university instructors. a triangulation approach to collect data was used in which a combination of the quantitative (using the questionnaires) and qualita...

Journal: :Computers & Geosciences 2006
Budiman Minasny Alex B. McBratney

This paper presents the conditioned Latin hypercube as a sampling strategy of an area with prior information represented as exhaustive ancillary data. Latin hypercube sampling (LHS) is a stratified random procedure that provides an efficient way of sampling variables from their multivariate distributions. It provides a full coverage of the range of each variable by maximally stratifying the mar...

2008
Wang Di Zhou Qingbo Liu Jia

The experiments were conducted for monitoring crop area by spatial sampling methods in a winter wheat main production region with a size of 42Km×42Km in Hengshui City, Hebei Province in China to optimize designs of the frameworks and elements (sample size, sample-square dimension), based on Remote Sensing (RS) and Geographical Information System (GIS) techniques. 5 sample-square dimension level...

2014
Jin-Won Noh Young-eun Kim In-Hwan Oh Young Dae Kwon Jinming Yu

Author's response to reviews: see over Dear editor-in-chief, Thank you for the kind and thoughtful opinion. It makes our paper more interesting and meaningful. We tried to do our best to revise the paper upon referee's advices. We addressed the comments in a revised manuscript. Here below is the detail explanation giving a point-by-point response to the concerns. Subject: MS: 5422170161117657-I...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و علوم انسانی 1391

abstract: one of the most visited & important spaces in different countries by tourist are urban areas. the old tehran which major part is located in district 12 is historical showcase of the capital, but, its hiidden cultural attraction is not used as it should be. this thesis occasionally engage in studying the efficacy of correct installation of travel guide boards in welfare & easily acc...

Journal: :Pakistan Journal of Statistics and Operation Research 2013

2008
Eric R. Buhi

Objective: The authors examined the incidence of stalking victimization and subsequent help-seeking behaviors among college women. Participants and Methods: A stratified random sample of college women (N = 391) completed an anonymous Internet-based questionnaire in spring 2006. Results: One-fifth of women reported stalking victimization while enrolled at their current institution. Individuals k...

2005
Yanrong Li Raj P. Gopalan

It is well recognized that mining association rules in a very large database is usually time consuming due to the I/O overhead in scanning the disk resident database. As one of the techniques for reducing the I/O overhead, sampling for mining association rules has been actively investigated during the last few years. Each sampling method and algorithm proposed in the literature has its own meri...

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