نتایج جستجو برای: principle componenet analysis.

تعداد نتایج: 2939147  

Journal: :آب و خاک 0
اکرم سیفی سید مجید میرلطیفی حسین ریاحی

abstract reference evapotranspiration (eto) is an essential parameter required for proper management of agricultural crop irrigation. eto is influenced by many different hydrological variables and as a result is a very complex procces. eto is usually estimated by empirical or process-orinented models (mathematical relationships) from historical weather data. the need for accurate estimates of e...

2011
Tahir Ahmad Dinesh K. Kumar

Independent component analysis (ICA) is a computational mehtod to solve blind source separation (BSS) problem. Different kinds of classic measure can be used for the estimation of nonGaussian sources by ICA. In this paper we review independent componenet analysis (ICA) technique based on Kurtosis contrast function. We briefly present the common independent component analysis algorithms that use...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده کشاورزی 1388

جنس فستوکا شامل حدود 450 گونه است که بیشتر آنها گیاهانی پایا و چندساله هستند. این جنس ارتباط نزدیکی با لولیوم ها (ryegrass) دارد. جنس فستوکا یکی از گروههای قدیمی است و بعنوان یکی از مهمترین دودمان های تکاملی در طایفه poaها مورد بررسی قرار می گیرد. بررسی ده جمعیت فستوکا بر پایه مطالعات کاریوتیپی نشان دهنده تعداد کروموزومی 14=x2=n2 در هر دوجمعیت (f. pratensis)، 42=x6=n2 در هر سه جمعیت (f. ovina) ...

The main goal of this article is to implement the MSG-3 process in structure field for an SSI component of b747 aircraft. This process is expected toincrease the ease of aircraft maintenance and its safety level. MSG-3 logic took a top-down or consequence of failure approachmeaning that MSG-3 reduces the maintenance cost and upgrades safety. Moreover, it cansignificantly help saving thetime and...

2010
Tatjana Šibalija Tatjana V. Šibalija Vidosav D. Majstorović

This paper presents a novel, general and intelligent approach to multiresponse process optimisation, whose purpose is to obtain a single optimum setting of process parameters that meets specifications of all considered, possibly correlated, responses. The approach is based on Taguchi quality loss function, multivariate statistical methods: Principal componenet analysis and Grey relational analy...

2001
C. A. Shah P. Watanachaturaporn P. K. Varshney M. K. Arora

In this paper, we present a summary of our ongoing research on the classification of hyperspectral images. We are experimenting with both supervised and unsupervised algorithms. In particular, we have developed an unsupervised classification algorithm based on Independent Component Analysis (ICA). This algorithm is known as the ICA mixture model (ICAMM) algorithm and has shown promising results...

Journal: :international journal of endocrinology and metabolism 0
mostafa rezaei-tavirani proteomics research center, faculty of paramedical sciences, shahid beheshti university of medical sciences, ir iran fariba fathi department of chemistry, sharif university of technology, p.o. box 11155-9516, ir iran +98-2166165305, [email protected] fatemeh darvizeh department of medicine, debrecen medical school, hungary mohamad reza reza zali research center for gastroenterology and liver disease, shahid beheshti university of medical sciences, ir iran mohamad rostami rostami nejad acute medicine, dudley group of hospital, uk kamran rostami department of basic science faculty of paramedical sciences, shahid beheshti university of medical sciences, p.o. box: 19395-4618, ir iran +98-2122718505, [email protected]

background celiac disease (cd) is a disorder associated with body reaction to gluten. after the gluten intake, an immune reaction against the protein occurs and damages villi of small intestine in celiac patients gradually. objectives the osc, a filtering method for minimization of inter- and intra-spectrometer variations that influence on data acquisition, was applied to biofluid nmr data of c...

Journal: :تحقیقات نظام سلامت 0
سعید راثی نظامی دانشجوی دکتری، گروه مهندسی عمران- محیط زیست، دانشکده محیط زیست، دانشگاه تهران، تهران، ایران مهرداد نظری ها استادیار، گروه مهندسی محیط زیست، دانشکده محیط زیست، دانشگاه تهران، تهران، ایران اکبر باغوند دانشیار، گروه مهندسی محیط زیست، دانشکده محیط زیست، دانشگاه تهران، تهران، ایران علی مریدی - استادیار، گروه مهندسی منابع آب، دانشکده مهندسی آب و محیط زیست، دانشگاه صنعت آب و برق شهید عباسپور، تهران، ایران

background: the spread of urbanization in floodplains as well as increase of industrial and agricultural activities in river discharges may lead to water pollution by physical, chemical and biological pollutants. one of the major concerns in monitoring the water resources system is indentifying major quality parameters and determining a relationship between physical and chemical parameters. thi...

2003
Baback Moghaddam David Guillamet Jordi Vitria Jordi Vitrià

We propose a novel local appearance modeling method for object detection and recognition in cluttered scenes. The approach is based on the joint distribution of local feature vectors at multiple salient points and factorization with Independent Componenet Analysis (ICA). The resulting densities are simple multiplicative distributions modeled through adaptive Gaussian mixtures. This leads to com...

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