نتایج جستجو برای: Principal Constituents Analysis (PCA)

تعداد نتایج: 2930818  

Journal: :international journal of finance, accounting and economics studies 0

the main focus in this study is on data pre-processing, reduction in number of inputs or input space size reduction the purpose of which is the justified generalization of data set in smaller dimensions without losing the most significant data. in case the input space is large, the most important input variables can be identified from which insignificant variables are eliminated, or a variable ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1388

این تحقیق با استفاده آنالیز چند متغیره بر روی عکس های ذخیره شده بوسیله یک دوربین دیجیتال راه حلی را برای مسئله همپوشانی پیک ها که یکی از مسائل مهم در کروماتوگرافی لایه نازک است ارائه میدهد. ما برای اولین بار اندازه گیری همزمان چند گونه بر روی کاغذ کروماتوگرافی لایه نازک را با استفاده از آنالیز چند متغیره عکس مورد مطالعه قرار دادیم. سیستم عکسبرداری متشکل از یک کابینت، یک دوربین دیجیتال و یک بر...

Journal: :future of medical education journal 0
masoumeh nazari chamak student research assembly, kerman university of medical science, kerman, iran khodadad sheikhzadeh regional knowledge hub and who collaborating centre for hiv surveillance, institute for futures studies in health, kerman university of medical sciences, kerman, iran ali akbar haghdoost regional knowledge hub for hiv/aids surveillance, research centre for modelling in health, institute for future studies in health, kerman university of medical sciences, kerman, iran

background: in order to check the practicality of classification of universities of medical sciences (umss) based on their infrastructures, and scientific contributions, this study explored the most appropriate indicators to measure the size and productivity of umss. methods: in the first phase, we approached a group of experts who had a deep experience in the management of umss and in the mini...

Journal: :International Journal of Computer Applications 2014

Journal: :Journal of pharmaceutical and biomedical analysis 2016
Jade D Owen Stewart B Kirton Sara J Evans Jacqueline L Stair

St. John's wort (SJW) (Hypericum perforatum) is a herbal remedy commonly used to treat mild depression. The elemental profiles of 54 samples (i.e., dry herbs, tablets and capsules) were evaluated by monitoring 25 elements using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The major elemental constituents in the SJW samples were Ca (300-199,000μg/g), Mg (410-3,530μg/g), Al...

Journal: :journal of paramedical sciences 0
mahdieh khalili department of biostatistics, faculty of paramedical sciences, shahidbeheshti university of medical sciences, tehran, iran hamid alavi majd department of biostatistics, faculty of paramedical sciences, shahidbeheshti university of medical sciences, tehran, iran soheila khodakarim department of biostatistics, faculty of paramedical sciences, shahidbeheshti university of medical sciences, tehran, iran batool ahadi mohsen hamidpour department of hematology, faculty of paramedical sciences, shahidbeheshti university of medical sciences, tehran, iran

the aim of this study was to propose a method for improving the power of recognition and classification of thromboembolic syndrome based on the analysis of ‎ gene expression data using artificial neural networks. the studied method was performed on a dataset which contained data about 117 patients admitted to a hospital in durham in 2009. of all the studied patients, 66 patients were suffering ...

Journal: :the modares journal of electrical engineering 2015
hamid reza shahdoosti hesan ghassemian

an ideal fusion method preserves the spectral information in fused image without spatial distortion. the pca is believed to be a well-known pan-sharpening approach and being widely used for its efficiency and high spatial resolution. however, it can distort the spectral characteristics of multispectral images. the current paper tries to present a new fusion method based on the same concept. in ...

2017
Xiaobo Zhang Yuping Zhao Lanping Guo Zhidong Qiu Luqi Huang Xiaobo Qu

BACKGROUND Daodi-herb is a part of Chinese culture, which has been naturally selected by traditional Chinese medicine clinical practice for many years. Sweet wormwood herb is a kind of Daodi-herb, and comes from Artemisia annua L. Artemisinin is a kind of effective antimalarial drug being extracted from A. annua. Because of artemisinin, Sweet wormwood herb earns a reputation. Based on the Pharm...

Journal: :journal of biomedical physics and engineering 0
a karimi rahmati control and intelligent processing center of excellence, school of electrical and computer engineering, college of engin s k setarehdan control and intelligent processing center of excellence, school of electrical and computer engineering, college of enginسازمان اصلی تایید شده: دانشگاه تهران (tehran university) b n araabi control and intelligent processing center of excellence, school of electrical and computer engineering, college of enginسازمان اصلی تایید شده: دانشگاه تهران (tehran university)

background: fetal electrocardiography is a developing field that provides valuable information on the fetal health during pregnancy. by early diagnosis and treatment of fetal heart problems, more survival chance is given to the infant. objective: here, we extract fetal ecg from maternal abdominal recordings and detect r-peaks in order to recognize fetal heart rate. on the next step, we find a b...

Journal: :caspian journal of environmental sciences 2005
a. salehi g. zahedi amiri

the field study was conducted in one district of educational-experimental forest at tehran university (kheirood-kenar forest) in the north of iran. eighty-five soil profiles were dug in the site of study and several chemical and physical soil properties were considered. these factors included: soil ph, soil texture, bulk density, organic carbon, total nitrogen, extractable phosphorus and depth ...

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