Novel Method for the Fast Determination of Ultra Trace Amount of Nortriptyline in its Pharmaceutical Formulations by Fast Fourier Transform Continuous Cyclic Voltammetric Technique at Au Microelectrode in Flowing Solutions

2007 ◽  
Vol 96 (4) ◽  
pp. 893-904 ◽  
Author(s):  
Parviz Norouzi ◽  
Mohammad Reza Ganjali ◽  
Simindokht Shirvani-Arani ◽  
Ali Mohammadi
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Trace Amount ◽  
Pharmaceutical Formulations ◽  
Cyclic Voltammetric ◽  
Fast Determination ◽  
Novel Method ◽  
Ultra Trace ◽  
Voltammetric Technique

Development of a highly sensitive and selective optical sensor for determination of ultra-trace amount of silver ions

2013 ◽  
Vol 176 ◽  
pp. 598-604 ◽  
Author(s):  
Ali R. Firooz ◽  
Ali A. Ensafi ◽  
Nafiseh Kazemifard ◽  
Reza Khalifeh
Keyword(s):  
Optical Sensor ◽  
Trace Amount ◽  
Silver Ions ◽  
Highly Sensitive ◽  
Ultra Trace

scholarly journals Cloud Determination of All-Sky Images under Low-Visibility Conditions

2009 ◽  
Vol 26 (10) ◽  
pp. 2172-2181 ◽  
Author(s):  
Juan Huo ◽  
Daren Lu
Keyword(s):  
Numerical Simulation ◽  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Aerosol Optical Depth ◽  
Image Features ◽  
Threshold Method ◽  
Integrated Method ◽  
Low Visibility ◽  
Key Factor

Abstract The threshold method is commonly used to determine cloud in a sky image. This paper evaluates the method by numerical simulation and shows that the aerosol optical depth (AOD) is a key factor that influences the accuracy. Particularly when the visibility is low, a single threshold method is inappropriate. To improve the accuracy of cloud determination from low-visibility sky images, an integrated cloud-determination algorithm is presented that is based on the fast Fourier transform, symmetrical image features, and threshold methods. The preliminary comparison tests show that the new integrated method improves the ability to determine cloud under lower-visibility conditions.

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