Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
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
Cite This
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
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
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.