Time-frequency kernel design by the two-dimensional frequency transformation method

2002 ◽  
Author(s):  
E.J. Zalubas ◽  
M.G. Amin
Keyword(s):  
Transformation Method ◽  
Two Dimensional ◽  
Frequency Transformation ◽  
Time Frequency ◽  
Kernel Design

Design of Dual-band Cavity Filter Using Frequency Transformation Method

2012 ◽  
Vol 34 (6) ◽  
pp. 1489-1493
Author(s):  
Xin Kou ◽  
Zhong-yin Xiao ◽  
Chun-yan Huang ◽  
Hao Li ◽  
Jun-jun Chu
Keyword(s):  
Transformation Method ◽  
Dual Band ◽  
Frequency Transformation

scholarly journals Vibration Analysis by the Wigner-Ville Transformation Method

2018 ◽  
Vol 20 (4) ◽  
pp. 24-28 ◽  
Author(s):  
Jaroslav Smutny ◽  
Viktor Nohal ◽  
Daniela Vukusicova ◽  
Herbert Seelmann
Keyword(s):  
Mathematical Analysis ◽  
Vibration Analysis ◽  
Linear Time ◽  
Practical Experience ◽  
Transformation Method ◽  
Application Area ◽  
Interesting Application ◽  
Time Frequency ◽  
Natural Processes

This paper deals with description and application of the Wigner-Ville transformation for vibration analysis. This transformation belongs to the group of non-linear time-frequency processes. Thanks to its properties, it may be successfully used in the area of non-stationary and transitional signals describing various natural processes. The use in the field of the railway constructions testing represents a quite an interesting application area of the transformation. This paper contains mathematical analysis of the transformation, a case study and practical experience obtained and recommendations for its practical use.

scholarly journals A SFTD Algorithm for Optimizing the Performance of the Readout Strategy of Residence Time Difference Fluxgate

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3985 ◽  
Author(s):  
Siyu Chen ◽  
Yanzhang Wang ◽  
Jun Lin
Keyword(s):  
Residence Time ◽  
Time Domain ◽  
Signal To Noise Ratio ◽  
Low Frequency ◽  
Transformation Method ◽  
Time Difference ◽  
Single Frequency ◽  
Time Frequency ◽  
Frequency Magnetic Field ◽  
The Time Domain

Residence time difference (RTD) fluxgate sensor is a potential device to measure the DC or low-frequency magnetic field in the time domain. Nevertheless, jitter noise and magnetic noise severely affect the detection result. A novel post-processing algorithm for jitter noise reduction of RTD fluxgate output strategy based on the single-frequency time difference (SFTD) method is proposed in this study to boost the performance of the RTD system. This algorithm extracts the signal that has a fixed frequency and preserves its time-domain information via a time–frequency transformation method. Thereby, the single-frequency signal without jitter noise, which still contains the ambient field information in its time difference, is yielded. Consequently, compared with the traditional comparator RTD method (CRTD), the stability of the RTD estimation (in other words, the signal-to-noise ratio of residence time difference) has been significantly boosted with sensitivity of 4.3 μs/nT. Furthermore, the experimental results reveal that the RTD fluxgate is comparable to harmonic fluxgate sensors, in terms of noise floor.

Time–frequency two-dimensional mapping of rapid energy transfer in light-harvesting star-shaped dendrimers

2008 ◽  
Vol 128 (5-6) ◽  
pp. 771-773 ◽  
Author(s):  
A. Ishida ◽  
Y. Makishima ◽  
A. Okada ◽  
I. Akai ◽  
K. Kanemoto ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Harvesting ◽  
Two Dimensional ◽  
Time Frequency ◽  
Dimensional Mapping
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