نتایج جستجو برای: Power Spectrum

تعداد نتایج: 688352  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی شاهرود - دانشکده کامپیوتر و فناوری اطلاعات 1391

تشخیص زنده بودن اثر انگشت، مبحثی جدید در حوزه امنیت سیستم های تشخیص هویت بر اساس اثر انگشت است. یکی از روش های تشخیص زنده بودن اثر انگشت، روش power spectrum است، که بر اساس آنـالـیـزهـای فـرکـانسی است. استفاده از این روش نتایج امیدوارکننده ای را در تشخیص حالات زنده و جعلی اثر انگشت داشته است. در این پایان نامه از این روش برای مقایسه اثر انگشت های مصنوعی sfinge با اثر انگشت های واقعی استفاده شده...

Journal: :iranian biomedical journal 0
rakesh kumar sinha amit kumar ray

continuous four hours eeg (electroencephalogram) recordings and its power spectrum analysis using fast fourier transform (fft) in urethane anesthetized male charles foster rats were performed in two groups: open brain injury and p-cpa (para-chlorophenylalanine) pretreated before brain injury, respectively, and compared with the eeg power spectrum of control rats. the eeg power spectrum analysis...

ژورنال: :مجله علوم پزشکی رازی 0
سعیده یوسف زاده saeideh yousefzadeh shahrood university of technologyدانشگاه صنعتی شاهرود مرتضی زاهدی morteza zahedi shahrood university of technologyدانشگاه صنعتی شاهرود

زمینه و هدف: پوست آدمی بیش از هر قسمتی از بدن در معرض خطرات، بیماری­ها و عوارض ناشی از کار قرار دارد. یکی از کاربردهای مطالعه در زمینه ارتباط بیماری­ها با پوست، استفاده از اثر انگشت در تشخیص بیماری و در نتیجه درمان به موقع آن است. در این پروژه تصاویر اثر انگشت مربوط به چند بیماری سیستماتیک مانند دیابت و اعتیاد مورد بررسی قرار گرفت. روش کار: اولین روشی که در تحلیل داده­ها استفاده شده، روش power ...

Journal: :journal of research in rehabilitation sciences 0
فرشته حبیبی تیرتاشی منصور اسلامی fereshteh habibi tirtashi mansour eslami

introduction: foot insoles are widely recommended to prevent running related to injuries. however, their effects on the frequency of ground reaction force(grf) is still unclear. the purpose of this study was to elemental test the effect of four shoe insoles on frequency of grf during stance phase of running. materials and methods: 15 female students (mean age22±1/85 year, height162±4/71cm and w...

Journal: :basic and clinical neuroscience 0
amir momeni boroujeni nima khalighinejad elham yousefi elham asadi

introduction: bipolar spectrum disorders include a variety of mood disorders from bipolar ii disorder to conditions characterized by hyperthymic mood states. it has been suggested that psychosocial factors also play an important role in bipolar disorders, in this study we have used social network analysis in order to better understand the social positions of those affected by bipolar spectrum d...

Amit Kumar Ray, Rakesh Kumar Sinha,

Continuous four hours EEG (electroencephalogram) recordings and its power spectrum analysis using fast fourier transform (FFT) in urethane anesthetized male Charles Foster rats were performed in two groups: open brain injury and p-CPA (para-Chlorophenylalanine) pretreated before brain injury, respectively, and compared with the EEG power spectrum of control rats. The EEG power spectrum analysis...

Journal: :journal of mining and environment 2015
allahyar khojamli faramarz doulati ardejani ali moradzadeh ali nejati kalateh amin roshandel kahoo

the ardabil geothermal area is located in the northwest of iran, which hosts several hot springs. it is situated mostly around the sabalan mountain. the sabalan geothermal area is now under investigation for the geothermal electric power generation. it is characterized by its high thermal gradient and high heat flow. in this study, our aim is to determine the fractal parameter and top and botto...

The present paper introduces the Bayesian spectral analysis as a powerful and efficient method for spectral analysis of photometric time series. For this purpose, Bayesian spectral analysis has programmed in Matlab software for XZ Dra photometric time series which is non-uniform with large gaps and the power spectrum of this analysis has compared with the power spectrum which obtained from the ...

Cognitive radio (CR) technology has been suggested for effective use of spectral resources. Spectrum sensing is one of the main operations of CR users to identify the vacant frequency bands. Cooperative spectrum sensing (CSS) is used to increase the performance of CR networks by providing spatial diversity. The accuracy of spectrum sensing is the most important challenge in the CSS process sinc...

Journal: :Journal of Cosmology and Astroparticle Physics 2021

Abstract We use the modified and improved Richardson-Lucy (IRL) deconvolution algorithm to reconstruct Primordial Power Spectrum (PPS) from Weak Lensing C L ϕϕ reconstructed CMB anisotropies. This provides an independent window observe constrain PPS P R ( k ) along different scales as compared Temperature Spectrum. The does not contain secondary variations in power hence is cleaner, unlike whic...

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