نتایج جستجو برای: component analysis

تعداد نتایج: 3268531  

Journal: :پژوهش های حبوبات ایران 0
زهرا عرفانی مقدم جلال صبا

assessment of different plant genetic resources clarifies genetic variation and makes it possible to apply them in plant breeding programs. in this experiment, 27 selected lines of common bean (phaseolus vulgaris l.), one local landrace and two conventional bean cultivars (talash and cos-16 as controls), sown using randomized complete block design with three replications in the research farm of...

Amir Afsharinia Kambiz Farahmand Morteza Bagherpour

Background and Objectives: Evaluating the performance of clinical units is critical for effective management of health settings. Certain assessment of clinical variables for performance analysis is not always possible, calling for use of uncertainty theory. This study aimed to develop and evaluate an integrated independent component analysis-fuzzy-data envelopment analysis approach to accurate ...

Journal: :تحقیقات جغرافیایی 0
حسین عساکره

climate is a multivariate system. every change in every climate variable could result in different changes in climate. recently, experts have paid extensive attention to frequency distribution sequence of climate elements. accordingly, many different indices have been defined. precipitation extremes can exhibit the phase space of climate system. a technique that can be used to analyze climate p...

Journal: :تحقیقات آب و خاک ایران 0
شمس اله ایوبی سارا محمدزمانی فرهاد خرمالی

an evaluation of the relationship between crop yield and soil properties would be useful in estimating the fluctuations in yield, and in an implementation of correct field management. the study was conducted in farmer operated wheat fields in sorkhankalateh district, 25 km northeast of gorgan, golestan province, iran. soil samples (0-30 cm depth) were collected just after crop planting at the e...

Journal: :desert 2008
e. fattahi k. noohi

frost is one of the atmospheric phenomena which seriously threaten crop production. it also causes numerousaccidents in mountainous roads. in this research the spatial synoptic classification ssc method was employed toclassify the type of air masses. for the classification, such meteorological data as: temperature, dew point, mean sealevel pressure, cloudiness, direction and speed of wind were ...

Journal: :geopersia 2014
hossein shahi reza ghavami abolghasem kamkar rouhani hoshang asadi haroni

the analysis of geochemical data in frequency domain, as indicated in this research study, can provide new exploratory informationthat may not be exposed in spatial domain. to identify deep geochemical anomalies, sulfide zone and geochemical noises in dalli cu–au porphyry deposit, a new approach based on coupling fourier transform (ft) and principal component analysis (pca) has beenused. the re...

Journal: :iranian journal of psychiatry 0
farnaz ghassemi biomedical department, amirkabir university of technology, tehran, iran mohammad hassan moradi biomedical department, amirkabir university of technology, tehran, iran mehdi tehrani-doost child & adolescent psychiatrist, psychiatry department, tehran university of medical science, tehran, iran, and institute for cognitive science studies (icss), tehran, iran vahid abootalebi electrical and computer engineering department, yazd university, yazd, iran

objective: conners adult adhd rating scale (caars) is among the valid questionnaires for evaluating attention-deficit/hyperactivity disorder in adults. the aim of this paper is to evaluate the validity of the estimation of missed answers in scoring the screening version of the conners questionnaire, and to extract its principal components. method: this study was performed on 400 participants. a...

Journal: :journal of advances in computer research 0
mohammad rajabi electrical and electronic engineering department, islamic azad university, south tehran branch, tehran, iran sedigheh ghofrani electrical and electronic engineering department, islamic azad university, south tehran branch, tehran, iran ahmad ayatollahi electrical engineering department, iran university of science and technology, tehran, iran

iris recognition is one of the most reliable methods for identification. in general, itconsists of image acquisition, iris segmentation, feature extraction and matching. among them, iris segmentation has an important role on the performance of any iris recognition system. eyes nonlinear movement, occlusion, and specular reflection are main challenges for any iris segmentation method. in this pa...

Journal: :Journal of Korean Institute of Intelligent Systems 2015

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