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Network coverage of wireless sensor network (WSN) means how well an area of interest is being monitored by the deployed network. It depends mainly on sensing model of nodes. In this paper, we present three types of sensing models viz. Boolean sensing model, shadow-fading sensing model and Elfes sensing model. We investigate the impact of sensing models on network coverage. We also investigate network...
Controller designs of multivariable systems are always difficult due to interactions and coupling between inputs and outputs. Control system design involves input/output (IO) selection, that is, decisions on the number, the place, and the type of actuators and sensors. The choice of inputs and outputs affects the performance, complexity, and cost of the control system. In most of the multivariable...
Reliable operation of HV equipment in gas insulated substations (GIS) is undermined by insulation defects and particle presence. Partial discharge (PD) monitoring is one of the most effective techniques for insulation condition assessment of HV power apparatus. However, on-line PD measurements are affected by high levels of electromagnetic interference (EMI) that makes sensitive PD detection very...
In this article, the efficient use of a genetic algorithm (GA) to the goal programming (GP) formulation of interval valued multiobjective fractional programming problems (MOFPPs) is presented. In the proposed approach, first the interval arithmetic technique [1] is used to transform the fractional objectives with interval coefficients into the standard form of an interval programming problem with...
Finite impulse response (FIR) filters are widely used in many applications involving signal processing algorithms. The FIR can also be used as a convolver or as a cross-correlator due to its structural similarity. In general the problem with the hardware implementation of FIR is mainly the area complexity and this is much prominent if the number of taps is pretty large. For high throughput application,...
This article describes a goal programming (GP) procedure for proper allocation of teaching personnel to the teaching departments for smooth functioning of the academic activities of a university. In the academic resource planning context, both the crisp and fuzzy goal objectives which are frequently involved with the problem are discussed. Again, certain ratios in the fractional forms which are inherently...
Wireless sensor network (WSN) consist of a large number of sensor nodes which are limited in battery power and communication range and are having multi-modal sensing capability. One of the most significant applications of wireless sensor network is environment monitoring. In this paper, a multi-sensor data fusion algorithm in WSN using fuzzy logic for event detection application is proposed. In the...
This paper presents simulation studies of an electric arc furnace (EAF) model in the MATLAB/SIMULINK environment. EAF was modeled as a current source controlled by a non-linear resistance. Voltage flicker, a phenomenon of annoying light intensity fluctuation, caused by EAF, has been a major power quality concern for both power companies and customers. A model was developed for the electric arc furnace...
Performance of a packetized data transmission in cellular CDMA is analyzed in presence of soft handoff and truncated power control. The combined effects of soft handoff parameters, truncated power control at physical layer and truncated ARQ at data link layer on throughput and delay performance of packet data under a prescribed delay constrain is studied. Truncated power control improves the performance...
This research is concerned with the data aggregation (DA) algorithms in wireless static networks, where host mobility is low or not provided and the number of nodes is fixed. The DA problem is investigated in the presence of omission faults, which can be a common type of failure in wireless communication. It is shown that, in the worst case, the number of rounds of message-exchange needed to reduce...
Design and development of a rectangular current pulse generator is presented. The generator produces 15 ms wide, 100 A amplitude unipolar pulses into an 8 Omega load. Pulses with duration of 10-20 ms are essential for the development of compacts of the nanomaterial samples while avoiding grain growth on the samples dominant at long pulses. The pulses are produced by discharging the charged artificial...
In this paper, we present a novel method of feedback controller design for a boost type dc-dc converter. The controller design is perceived as an optimization process of dynamic response enhancement and solution is sought through genetic algorithm. The use of exact model of boost converter in conjunction with evolutionary search results in a robust controller structure which guarantees excellent dynamic...
Using block-pulse functions (BPF) a recursive algorithm is presented for the analysis of linear time-invariant optimal control systems incorporating observers. An illustrative example is included to demonstrate the superiority of proposed recursive algorithm over the existing recursive approach.
Transmission and storing of high density digital information plays an important role in the present age of communication and information technology. These data are distorted while reading out of the recording medium or arriving at the receiver end due to inter symbol interference in the channel. The adaptive channel equalizer alleviates this distortion and reconstructs the transmitted data faithfully...
The idea of this research is creation of a mega programmable interactive robotic surface, dynamically responsive three dimensional surface that configures in real-time according to input from a variety of input sources (movements sensors, sound signals, video signals, maths data generated within the controller etc). As such, it can be thought of as a three-dimensional surface or screen, but one that...
In this paper we propose an expectation-maximization (EM) algorithm with distance measure for color image segmentation. The probability distribution model used is the Gaussian mixture model. The concept of color distance measure is used in this algorithm to determine the region to which a particular pixel belongs. L *a* b color space is used to replace the more straightforward spaces such as the RGB...
This paper presents an algorithm to enumerate global and 2-terminal cutsets for directed networks. Several benchmark networks are taken to evaluate for 2-terminal and global reliability measures for directed networks with sum-of-disjoint-product (SDP) based multi-variable inversion (MVI) technique without any requirement of complex mathematics or graph-thoery concepts.
Closed-form approximate solution of the nonlinear equations of motion of an aerial homing engagement under the realistic true proportional navigation guidance law is derived using the Adomian decomposition method. ADM provides an analytical approximate series solution to nonlinear differential equations, requiring no linearization or direct integration of the nonlinear terms. A novel attempt has been...
In this paper, a fast and simple technique to generate the current reference to compensate for the harmonics and reactive power in a shunt type active power filter (APF) is developed. A voltage source inverter (VSI) is operated in the current controlled mode for this purpose. For fast generation of the reference current in the APF, the dc link voltage of the VSI is always sensed and an initial estimate...
This paper describes real-time implementation of a Lyapunov energy function based fuzzy adaptive step size filtered-x-LMS (FxLMS) algorithm for active control of noise in a single channel duct. The proposed method uses a Lyapunov energy function of the error for step size adjustment in the filtered-x-LMS (FxLMS) algorithm. The energy function and its rate of change are taken as the principal signals...
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