The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this study 2-layer ANN (artificial neural network) a linear classifier and k-NN (k-nearest neighbor) a non-linear classifier were applied for identification and classification of images of four Indian wheat seed species into four classes of wheat seeds on the basis of their varieties. 120 images (40 images of four classes, 10 images of each class) from three different places were taken under same...
We discuss the axisymmetrical diffraction problem for a strongly elongated convex and smooth scat-terer in shortwave approximation where the classical method of parabolic equation fails. To overcome that difficulty we propose a new boundary layer in the light-shadow zone and consider in more details the matching of asymptotics in the illuminated part of that zone.
In this research, we present a discrete version of cat swarm optimization that is used to build an optimization model based on support vector machines (SVM). This model is undertaken to select the best transformer tests that can be utilized to classify transformer health index into three categories; thus, improving the reliability of identifying the transformer condition within the power system. The...
Reliable extraction/segmentation of text lines, words and characters is one of the very important steps for development of automated systems for understanding the text in low resolution display board images. In this paper, a new approach for segmentation of text lines, words and characters from Kannada text in low resolution display board images is presented. The proposed method uses projection profile...
In this study, ABC (Artificial Bee Colony) and BGA (Binary Genetic Algorithm) algorithms are used to synthesis of the four-bar mechanisms for path generating. The main goal is to extract the optimized dimension of mechanism links to transmit coupler point in the desired path with minimum error. In addition, the object mechanism has dimensional limitations such as the crank link should rotate 360 degree...
The main focus of this paper is on the estimation of target motion parameters using bearing measurements. Here, based on a linearization of measurements, a recursive least squares (RLS) solution is developed. The performance of the proposed method is compared to PLE which uses the same approach in measurement linearization. Simulation results show the excellence of the proposed method over the PLE,...
Masking effect is the most important problem in Noise Radars. Recently, some waveform design methods to resolve this problem have been developed, however this paper will show an important fact: 'sidelobe suppression increases the Periodicity of signal and, consequently, decreases unpredictability'. Eventually, an appropriate level for sidelobe reduction is introduced.
A method to analyze the injection locking and injection pulling of arbitrary oscillators under small excitation is proposed. The most general case when the excitation frequency is close to a rational fraction of the oscillator fundamental is considered. The phase differential equation for an arbitrary periodic excitation is derived. Expressions to evaluate characteristics of the oscillator in injection...
Automated systems for understanding display boards are finding many applications useful in guiding tourists, assisting visually challenged and also in providing location aware information. Such systems require an automated method to detect and extract text prior to further image analysis. In this paper, a methodology to detect and extract text regions from low resolution natural scene images is presented...
A new approach of extremely scaled MOSFET device based on modified BSIM4v6 is presented for modelling and analysis. The model ensures the continuities of current-voltage, conductance and transconductance through all voltage bias conditions. The improved model has been enhanced by device parameters and dimensions to accounts for all use in various device technologies with less extracted parameters...
Product recommendation system has been widely used in industry especially for e-Commerce companies to solve the problem of information overload. Nonetheless, information overload is also a severe issue in custom product development practice. Sometimes customers can easily get overwhelmed by the vast number of product varieties and it is hard for them to make choices. However, the established product...
In this paper we combine an invariant-set approach to fault detection and identification (FDI), recently proposed by the authors, with the virtual actuator approach to controller reconfiguration of Steffen, Lunze and co-authors. The FDI approach is based on the separation of invariant sets that characterise healthy system operation from invariant sets that characterise faulty operation. The derivation...
For the enhancement of emergency call services and location based services (LBS), tracking mobile station (MS) has become one of the most urged needs within modern technologies. Moreover the act by Federal Communication Commission (FCC) on 1990 increased the requirement for finding a MS within a standard confined region. There are several approaches for tracking MS. The aim of this paper is to find...
Infrared (IR) focal-plane array (FPA) detectors suffer from fixed-pattern noise (FPN), also known as spatial nonuniformity, which degrades image quality. In fact, FPN remains a serious problem despite recent advances in IRFPA technology. This work proposes a scene-based correction algorithm to continuously compensate for bias and gain nonuniformity in focal-plane array sensors. The proposed technique...
Multiple description coding (MDC) offers an elegant approach to data transmission over lossy packet-based networks. This paper proposes an MDC decoder for Compressed Sensing (CS) based MDC. Our decoder minimizes ??0 norm of the total variation of the image in a recursive manner, making it effective when different descriptions experience different time delays in the network. The proposed approach brings...
Reduction of Peak to Average Power Ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) is investigated here. Clipping can be performed in two ways- one is to clip the complex envelopes of OFDM signal and the other is to clip the Inphase (I-signal) and Quadrature phase (Q-signal) independently. The detailed investigation concerning the PAPR reduction and Complementary Cumulative Distribution...
In this paper, an automatic border detection of cardiac cavity in two-dimensional short axis echocardiography image is proposed. The method uses boundary and triangle equation to detect and reconstruct the border. The first step is determining the initial centers boundary. The second step is applying morphological and thresholding operations to eliminate noise and convert it into binary image. The...
This paper presents a new model for three level inverter using dual two level inverter. A space vector PWM technique is developed based on the combination of space vector from dual inverter feeding open end winding induction motor (OEWIM). A total of ??64?? combinations produce ??19?? operating vectors which make a hexagon shape similar to that produced by neutral point clamped three - level inverter...
This paper proposes an integrated framework for speaker indexing which includes both speaker segmentation and speaker clustering. Speaker indexing systems has wide domains of application with different requirements which make a general speaker indexing framework hard to accomplish. The main source of performance degradation in speaker indexing is the probable existence of short speech utterances which...
A probabilistic analytical framework for decentralized load balancing (LB) strategies for heterogeneous distributed-computing systems (DCSs) is presented with the overall goal of maximizing the service reliability in the presence of random failures. The service reliability of a DCS is defined as the probability of successfully serving a specified workload before all the computing nodes fail permanently...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.