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The traditional JPEG compression standard, unlike JPEG2000, does not prescribe a means for spatially-variable quantization of transform coefficients. This prevents useful features such as region-of-interest (ROI) coding, where, for example, the subject in a photograph may be lightly compressed while the background is heavily compressed to hide irrelevant details. In this paper, we show how the quantization...
We propose a fragment based algorithm for efficient target tracking under significant scale variation and partial occlusion. In contrast, none of the previous multiple part or fragment based algorithms are both scale adaptive and robust to partial occlusion. In our algorithm, the target is divided into a number of overlapping image fragments. Their color histograms are compared with those of candidate...
Frequent items mining is a very basic but important task in the data stream processing. However the traditional algorithms such as Lossy Count can only find out frequent items based on computing their counts. In some situations, people want to monitor those items whose weight exceeding a user-specified threshold over the data stream. In this paper, we propose a novel algorithm to address this problem...
Communication through intermediate relay node, splits the channel between source and destination into two possibly shorter links, which improves link quality as well as combat with harsh multi-path fading. Close form expressions of average received SNR, outage probability and average bit error rate (BER) have been derived, for the case when communication between source and multi-antenna destination...
The paper derives a more accurate upper bound for BER for M-QAM than is currently used in the literature. This allows a more thorough analysis of the power adaptation to fading conditions for optimization of spectral efficiency. By taking into account the effect of error coding gain on power adaptation, a 7-state FSMC model for the implementation of the adaptive modulation and coding scheme in WiMAX...
Grid connected photovoltaic (PV) systems are becoming increasingly attractive as a generation alternative due to new developments in technologies, environmental concerns and transmission congestion management. Usually the energy storage system is used to store the excess power generated during off-peak hours and to return it to the system when power from PV is not enough for the system or generation...
This paper addresses the stability of a multi-antenna space division multiple access (SDMA) system that uses zero-forcing beamforming to support packet data services for a small number of mobiles. Define the stability region as the set of packet arrival rates for which finite queue lengths are feasible in the steady state. Consider perfect feedback of channel state information (CSI) and equal power...
This paper presents an optimal power flow control in an electrical power system incorporating interline power flow controller (IPFC) and using the particle swarm optimization (PSO) technique. Based on the steady state model, the sizing of the IPFC controller in the network is formulated as an optimization problem to minimize the transmission line loss in the network. The power flow control constraints...
Plagiarism is the practice of claiming, or implying, original authorship or incorporating material from someone else's written or creative work, in whole or in part, into one's own without adequate acknowledgement. Unlike cases of forgery, in which the authenticity of the writing, document, or some other kind of object, itself is in question, plagiarism is concerned with the issue of false attribution...
This paper proposes a design methodology for solving a multi-objective circuit design problem, which is based on formulating the problem as a multi-objective geometric program (MOGP) with variable weight factors. In general, to solve the problem using GP, multiple objectives are combined into a scalar objective by assigning arbitrary, fixed weight factors to individual objectives. On the contrary,...
Solar energy is one of the most promising renewable energy sources. The generating capacity of this source however is highly dependent on the available sunlight, its duration and intensity. In order to integrate these types of sources into an existing power distribution system, system planners need an accurate model that predicts its generating capacity with the usage of easily accessible information...
This paper describes the design and realization of a 4??4 Butler matrix as a beam forming network along with 4 linear antenna arrays to obtain four steerable beams, operating at 2.4 GHz. The simulation results are obtained using FEKO software. Further the concept of multibeam switching is discussed with an idea of suspended feed in between two matrices.
We model an optical front-end receiver with an intermediate frequency (IF) signal transmission utilizing photonic up-conversion technique through harmonic balance simulation analysis. A mixing model is carried out taking advantages of the nonlinearities of the InP/InGaAs HBT to achieve up-conversion of a modulated optical signal. The intensity of the optical signal is modulated by an IF signal ranging...
In this paper we propose a novel method to detect and record various posture-based and movement-based events of interest in a typical elderly monitoring application in a home surveillance scenario. Posture-based events include standing, sitting, bending/squatting, side lying and lying toward the camera. While movement-based events include running, jumping, active and inactive events. For posture classification,...
Multicast transmission enables a sender to distribute data to multiple intended receivers simultaneously. However, the multicast transmission should be reliable in erasure channel. Forward Error Correction (FEC) enables the lost packets to be recovered from some extra redundant packets without any retransmission. In this paper, we propose a new FEC codes, called Polynomial Interpolation codes (PI...
Stochastic assessment is a method to predict the severity and number of voltage sags at a bus of interest in the transmission network. In this paper, a technique using impedance matrix for stochastic assessment was developed to predict the voltage magnitudes due to faults at any bus in the electrical network. The proposed technique was applied to IEE 24- bus electrical network to illustrate its application...
Harmonic analysis of a network of Adjustable Speed Drives (ASDs) has been experimentally investigated. A small-scale laboratory of the network of two ASDs connected to two induction motors was setup. Load of motor 1 was fixed while load of motor 2 was varied. In the experiment, measurements have been done at both side of power transformer to analyze power system harmonic.
E-mail systems are some of the most admired Internet-based applications today. They enable users to send and receive e-mail messages between each other both from inside and outside the local area network. The simple mail transfer protocol (SMTP) is a transportation protocol used to transfer Email messages over the Internet. When the e-mail server sends email messages among each other or from the clients...
Reconfigurability refers to systems incorporating some form of hardware programmability, that customizes how the hardware is used using a number of physical control points. These control points can be changed periodically in order to execute different applications using the same hardware. This paper presents the design and implementation of reconfigurable switch architecture for next generation networks...
H.264 rate control is an interesting problem that has motivated numerous possible solutions. The challenge lies in determining a quantization parameter Qp that will be used for both the rate-distortion (R-D) optimization process and the quantization of transform coefficients. In this work, we attempt to achieve effective rate control with a different approach. By modelling the relationships of distortion,...
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