Variable-frequency complex demodulation technique for extracting amplitude and phase information

1997 ◽  
Vol 68 (1) ◽  
pp. 1111-1114 ◽  
Author(s):  
H. Gasquet ◽  
A. J. Wootton
Keyword(s):  
Variable Frequency ◽  
Phase Information ◽  
Complex Demodulation

scholarly journals A robust ECG denoising technique using variable frequency complex demodulation

2020 ◽  
pp. 105856
Author(s):  
Md-Billal Hossain ◽  
Syed Khairul Bashar ◽  
Jesus Lazaro ◽  
Natasa Reljin ◽  
Yeonsik Noh ◽  
...  
Keyword(s):  
Variable Frequency ◽  
Complex Demodulation ◽  
Ecg Denoising

Electron holography of catalysts

1995 ◽  
Vol 53 ◽  
pp. 416-417
Author(s):  
A. K. Datye ◽  
D. S. Kalakkad ◽  
L. F. Allard ◽  
E. Völkl
Keyword(s):  
Heterogeneous Catalysts ◽  
High Surface ◽  
High Surface Area ◽  
Atomic Scale ◽  
Nano Particles ◽  
Phase Image ◽  
Electron Holography ◽  
Specimen Thickness ◽  
Phase Information ◽  
Particle Structure

The active phase in heterogeneous catalysts consists of nanometer-sized metal or oxide particles dispersed within the tortuous pore structure of a high surface area matrix. Such catalysts are extensively used for controlling emissions from automobile exhausts or in industrial processes such as the refining of crude oil to produce gasoline. The morphology of these nano-particles is of great interest to catalytic chemists since it affects the activity and selectivity for a class of reactions known as structure-sensitive reactions. In this paper, we describe some of the challenges in the study of heterogeneous catalysts, and provide examples of how electron holography can help in extracting details of particle structure and morphology on an atomic scale.Conventional high-resolution TEM imaging methods permit the image intensity to be recorded, but the phase information in the complex image wave is lost. However, it is the phase information which is sensitive at the atomic scale to changes in specimen thickness and composition, and thus analysis of the phase image can yield important information on morphological details at the nanometer level.

Study of Variable Frequency Induction Heating in Steel Making Process

2010 ◽  
Vol 130 (10) ◽  
pp. 1131-1138 ◽  
Author(s):  
Kazuhiko Fukutani ◽  
Kenji Umetsu ◽  
Takeo Itou ◽  
Takanori Isobe ◽  
Tadayuki Kitahara ◽  
...  
Keyword(s):  
Induction Heating ◽  
Variable Frequency ◽  
Steel Making
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