Investigation of using linear and quadratic time-frequency representations for electromagnetic feature extraction with reduced aspect sensitivity

Date

2003-09-01

Author

Sayan, Gönül

Metadata

Show full item record

Item Usage Stats

55
views

0
downloads

The feasibility of using some well-known time-frequency representation (TFR) techniques besides the Wigner distribution (WD) was examined. Four different TFRs, the Gabor expansion (GE), the short time Fourier transform (STFT), the Page distribution (PD) and the WD, were used for feature extraction and target recognition based on the same set of target classes and the same reference database for fair comparison of the results. Among the four TFRs, the WD was found to be superior to other TFRs for the extraction of natural response related to electromagnetic target features with low aspect sensitivity and high target identification power.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0041471403&origin=inward
https://hdl.handle.net/11511/70800

Conference Name

2003 IEEE International Antennas and Propagation Symposium and USNC/CNC/URSI North American Radio Science Meeting (22-27 June 2003)

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Investigation of relationship between aggregate shape parameters and concrete strength using imaging techniques Özen, Murat; Güler, Murat; Department of Civil Engineering (2007) In this study, relationships between aggregate shape parameters and compressive strength of concrete were investigated using digital image processing and analysis methods. The study was conducted based on three mix design parameters, gradation type, aggregate type and maximum aggregate size, at two levels. A total of 40 cubic concrete specimens were prepared at a constant water-cement ratio. After the compressive strength tests were performed, each specimen was cut into 4 equal pieces in order to obtain the...
RECONSTRUCTION OF PERMITTIVITY AND CONDUCTIVITY PROFILES OF A DIELECTRIC SLAB IN THE TIME DOMAIN BY DESCENT METHODS ONDER, M; Kuzuoğlu, Mustafa (Institution of Engineering and Technology (IET), 1992-10-01) An optimisation approach is presented for the problem of reconstructing the permittivity and conductivity profiles of a dielectric slab from the reflected and transmitted field data. The problem is treated as an optimal control problem where the norm of the difference of measured and calculated boundary data is minimised subject to the state equation governing the system. The original constrained optimisation problem is reduced to the evaluation of stationary points of an augmented functional which is obtai...
Analysis and testing of a contraction-and-expansion micromixer for micromilled microfluidics Yıldırım, Ender (2017-10-01) In this paper, numerical analysis and experimental investigation of a micromixer, which was specifically designed for microfluidic devices fabricated by micromilling, is presented. The mixer is composed of series of contractions and expansions in zigzag arrangement along a mixing channel. Mixers, fabricated by micromilling on polymethylmethacrylate (PMMA), were tested with %0.1 Ponceau 4R red food dye solution and distilled water. According to experiment results, over 70% mixing efficiency could be obtained...
Evaluation of discrete ordinates method for radiative transfer in rectangular furnaces Selçuk, Nevin (1997-01-01) The discrete ordinates method (DOM) and discrete transfer method (DTM) were evaluated from the viewpoints of both predictive accuracy and computational economy by comparing their predictions with exact solutions available from a box-shaped enclosure problem with steep temperature gradients. Comparative testing shows that the S-4 approximation produces better accuracy in radiative energy source term than in flux density in three orders of magnitude less CPU time than that required by the DTM. The S-4 approxi...
Investigation and comparison of the preprocessing algorithms for microarrayanalysis for robust gene expression calculation and performance analysis of technical replicates İLK, HAKKI GÖKHAN; İlk Dağ, Özlem; KONU KARAKAYALI, ÖZLEN; ÖZDAĞ, Hilal (2006-04-19) Preprocessing of microarray data involves the necessary steps of background correction, normalization and summarization of the raw intensity data obtained from cDNA or oligo-arrays before statistical analysis. Several algorithms, namely RMA, dChip, and MAS5 exist for the preprocessing of Affymetrix microarray data. Previous studies have identified RMA as one of most accurate algorithms while MAS5 was characterized with lower accuracy and sensitivity levels. In this study, performance of different preprocess...

Citation Formats

G. Sayan, “Investigation of using linear and quadratic time-frequency representations for electromagnetic feature extraction with reduced aspect sensitivity,” Columbus, OH, Amerika Birleşik Devletleri, 2003, vol. 2, p. 243, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0041471403&origin=inward.