Browsing Makale Koleksiyonu by Issue Date
Now showing items 1-20 of 75
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A cost-effective method for ultrasound volumetric imaging
(1996)A synthetic receive aperture technique is explored for cost-effective ultrasound scanners with high frame rates and beam density. The technique provides ultrasound volumetric imaging where beam count is very large with 2-D ... -
Segmentation of ultrasonic images using fuzzy sets
(1996)An image segmentation technique based on fuzzy sets for ultrasonic B-scans is presented. The fuzzy c-means algorithm is adapted to B-scan images. The classes constituting a region are obtained through fuzzy partitioning ... -
A fuzzy colour quantizer for renderers
(Elsevier Science Bv, 1998)This paper presents a new colour quantization method for ray tracing. Normally, quantization is carried out by generating statistics about the colours present in the original image. Then a colour look-up table is created ... -
Improving performance of switched reluctance motor by fuzzy logic controller
(John Wiley & Sons Ltd, 1999)This paper presents torque ripple minimization of a switched reluctance motor (SRM) by using a fuzzy controller, The nonlinear model of the SRM and the mathematical model of the converter circuit are driven. The motor used ... -
Tek bölgeli güç sistemlerinde bulanık mantık ile yük frekans kontrolü
(2002)Bu makalede, güç sistemlerindeki yük frekans kontrol problemine bir bulanık mantık kontrolör uygulanmıştır. Bu amaçla bir Pl kontrolörün bulanık mantıkla kazancı ayarlanmıştır. Çalışma tek bölgeli bir güç sisteminde ... -
An adaptive observer for cryptosystems based on the Lorenz chaotic oscillator
(2003)Doğrusal olmayan sistemler için önerilmiş bir adaptif gözleyici tasarım tekniği, kripto sistemlerinde kullanılan Lorenz kaotik sistemine başarıyla uygulanmıştır. Bu gözleyici doğrudan doğruya geribesleme kullanmaz; ... -
A full adaptive observer for DC servo motors
(2003)An adaptive observer estimating all parameters and load torque is proposed for DC servo motors. The observer uses no direct feedback but the adaptation schemes use current and speed measurements. Both the observer and ... -
An adaptive observer for Lorenz chaotic system
(2003)An adaptive observer design technique proposed for nonlinear systems have been successfully applied to the Lorenz system, which produces chaotic oscillations. This observer does not use any feedback directly. The feedback ... -
Lorenz kaotik sistemi için adaptif bir gözleyici
(2003)Doğrusal olmayan sistemler için önerilmiş bir adaptif gözleyici tasarım yöntemi, kaotik salınımlar üreten Lorenz sistemi üzerinde başarı ile uygulanmıştır. Geribesleme bu gözleyici tarafından doğrudan kullanılmayıp sadece ... -
Design of a circular piezoelectric transformer with crescent-shaped input electrodes
(Inst Pure Applied Physics, 2003)In this study, a new disk-type piezoelectric transformer design is proposed. The input side of the transformer has a crescent-shaped electrode and the output side has a focused poling direction. The electrodes and poling ... -
Load-frequency control in two area power system
(2004)Bu makalede, bölge yük-frekans kontrolü için bir bulanık mantık uygulaması araştırılmıştır. Kontrolör, iki bölgeli enterkonnekte güç sistemi için dizayn edilmiştir. Kontrolörde bulunan integral ve oransal kazanç katsayıları ... -
Detection of defects in a cantilever beam using modal test data
(2004)Bu çalışmanın amacı çatlaklı kirişlerde hasar yeri ve derinliği hakkında bilgi edinmektir. Bu amaçla kirişte darbe vuruşu sonucu oluşan titreşimler incelenmiştir. Hasarlı ve hasarsız kirişlerden elde edilen sinyal hem zaman ... -
A multiobject tracking framework for interactive multimedia applications
(Ieee-Inst Electrical Electronics Engineers Inc, 2004)Automatic initialization and tracking of multiple people and their body parts is one of the first steps in designing interactive multimedia applications. The key problems in this context are robust detection and tracking ... -
New natural observer applied to speed-sensorless DC servo and induction motors
(Ieee-Inst Electrical Electronics Engineers Inc, 2004)A simple observer design technique with parameter adaptation is proposed for bounded-input bounded-output nonlinear systems. In this technique, no feedback is used in the observer but parameter estimations are considered ... -
Direction problem in leader-follower formations of unmanned aerial vehicles and satellite clusters
(2007)This paper is concerned with information structures used in rigid formations of unmanned aerial vehicles (UAV‘s) and micro-satellite clusters that have leader-follower architecture. The focus of the paper is on sensor/network ... -
Using angle of arrival (bearing) information for localization in robot networks
(2007)In this paper, we consider using angle of arrival information (bearing) for localization in robot networks. The essential property we require in this paper is that a node can infer heading information from its neighbors. ... -
The adaptive ARMA analysis of EMG signals
(Springer, 2008)In this study, Adaptive auto regressive-moving average (A-ARMA) analysis of EMG signals recorded on the ulnar nerve region of the right hand in resting position was performed. A-ARMA method, especially in the calculation ... -
Channel estimation based on adaptive neuro-fuzzy inference system in OFDM
(Ieice-Inst Electronics Information Communications Eng, 2008)In this letter we purpose adaptive neuro-fuzzy inference system (ANFIS) for channel estimation in orthogonal frequency division multiplexing (OFDM) systems. To evaluate the performance of this estimator, we compare the ... -
Feature selection in facial expression analysis and its effect on multi-SVM classifiers
(Gazi Univ, Fac Engineering Architecture, 2009)Facial expressions are non-verbal signs that play important role to provide complete meaning in human communication. While humans can easily comprehend the facial expressions, it is not valid for the computers, thus the ... -
Yüz ifade analizinde öznitelik seçimi ve çoklu SVM sınıflandırıcılarına etkisi
(2009)Yüz ifadeleri, insan ilişkilerinde anlam bütünlüğünün sağlanması için büyük rol oynayan, sözlü olmayan işaretlerdir. İnsanoğlu yüz ifadelerini kavramada herhangi bir zorluk çekmezken, bu durum makineler için geçerli olmayıp, ...