نتایج جستجو برای: component analysis

تعداد نتایج: 3268531  

Journal: :iranian journal of pharmaceutical sciences 0
reza tabaraki department of chemistry, faculty of science, ilam university, ilam, iran negar sadeghinejad department of chemistry, faculty of science, ilam university, ilam, iran

herbal water is referred to the liquid obtained from the distillation of medicinal plants. different parts of plants, such as flowers, fruits, leaves, seeds and roots have long been used to produce herbal waters. herbal waters are used as dietary supplements and alternative medicine and are commonly used for flavoring in baking. previous studies focused on the non-volatile constituents of herbs...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2006
keivan ansari sayed hossein amirshahi siamak moradian

a procedure for an efficient recovering of reflectance spectra of acrylic paint samples from cie tristimulus color values is described. by fixing a certain criteria based on color difference value, the proposed technique preliminarily selects a series of suitable samples from a main dataset containing the reflectance values of a series of different acrylic paint samples, based on the color spec...

Journal: :journal of rangeland science 2016
mousa akbarlou negin nodehi

medicinal plant species constitute a considerable part of the flora in iran and play a major role in the composition of plant communities. therefore, it is necessary to recognize the factors leading to the establishment and distribution of vegetation. for data sampling (2012), land units were specified. the plot size was determined using minimal area method and number of plots was determined by...

Journal: :international journal of environmental research 2011
l. belkhiri a. boudoukha l. mouni

q-mode hierarchical cluster (hca) and principal component analysis (pca) were simultaneously applied to groundwater hydrochemical data from the three times in 2004: june, september, and december, along the ain azel aquifer, algeria, to extract principal factors corresponding to the different sources of variation in the hydrochemistry, with the objective of defining the main controls on the h...

Journal: :journal of agricultural science and technology 2015
s. chatterjee r. goswami p. bandopadhyay

targeted extension for heterogeneous farming systems is a challenge in developing countries. farm type identification and characterization based on estimates of income from different farm components allows simplifying diversity in farming systems. use of multivariate statistical techniques, such as principal component analysis (pca) and cluster analysis (ca), help in such farm typology delineat...

Journal: :journal of artificial intelligence in electrical engineering 2016
saeede jabbarzadeh reyhani saeed meshgini

classical lbp such as complexity and high dimensions of feature vectors that make it necessary to apply dimension reduction processes. in this paper, we introduce an improved lbp algorithm to solve these problems that utilizes fast pca algorithm for reduction of vector dimensions of extracted features. in other words, proffer method (fast pca+lbp) is an improved lbp algorithm that is extracted ...

Journal: :iranian journal of environmental sciences 0
debbrota mallick institute of marine sciences and fisheries, university of chittagong, chittagong 4331, bangladesh md. islam institute of marine sciences and fisheries, university of chittagong, chittagong 4331, bangladesh avijit talukder institute of marine sciences and fisheries, university of chittagong, chittagong 4331, bangladesh shamindra mondal institute of marine sciences and fisheries, university of chittagong, chittagong 4331, bangladesh md. al-imran institute of marine sciences and fisheries, university of chittagong, chittagong 4331, bangladesh satchidananda biswas shushilan, khulna, bangladesh

the karnafully is one of the most important rivers due to its profound influence on water chemistry and sediment characteristics. the present study intended to assess the quality of water and sediment from intertidal zone of this river in respect to the pollution index. seasonal water and sediment samples were collected during four seasons (monsoon, post-monsoon, winter, and pre-monsoon) of 201...

Journal: :the iranian journal of pharmaceutical research 0
rezvan zendehdel student research committee, shahid beheshti university of medical sciences, tehran, iran. department of toxicology and pharmacology, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran. ali masoudi-nejad laboratory of systems biology and bioinformatics (lbb), institute of biochemistry and biophysics and coe in biomathematics, university of tehran, tehran, iran farshad h. shirazi pharmaceutical research sciences center, shahid beheshti university of medical sciences, tehran, iran. department of toxicology and pharmacology, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran.

drug resistance enables cancer cells to break away from cytotoxic effect of anticancer drugs. identification of resistant phenotype is very important because it can lead to effective treatment plan. there is an interest in developing classifying models of resistance phenotype based on the multivariate data. we have investigated a vibrational spectroscopic approach in order to characterize a sen...

The present paper aims to investigate the amount of multi-cultural education components in the textbooks of secondary schools from 2013 to 2014. It is conducted through text-analysis. The components of Multi-cultural education were initially collected from theoretical text and research background using document analysis and then they were numbered in the textbooks of secondary schools. The unit...

  In this paper, we propose a nonparametric rank-based alternative to the least-squares independent component analysis algorithm developed. The basic idea is to estimate the squared-loss mutual information, which used as the objective function of the algorithm, based on its copula density version. Therefore, no marginal densities have to be estimated. We provide empirical evaluation of th...

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