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This paper deals with the assessment of voltage sag for power quality analysis. For this purpose different voltage signals having different percentages of sag have been simulated and then by Discrete Wavelet Transform (DWT) based Skewness analysis is done to detect the voltage sag condition. After that interpolation or extrapolation have been done for unknown Skewness values for assessment of voltage...
Mean Value Engine Models (MVEM) are used to model the averaged dynamics of an automobile engine system for control and fault diagnosis. One approach to automobile fault diagnosis is to employ the use of a bank of residual generators each of which use a fault model and produces fault residues. These fault residues could then be used to detect or isolate faults using fault detection logic in the Fault...
The concept of dynamic spectrum access (DSA) enables the licensed spectrum to be traded in an open market where the unlicensed users can freely buy and use the available licensed spectrum bands. However, like in the other traditional commodity markets, spectrum trading is inevitably accompanied by various competitions and challenges. In this paper, we study an important business competition activity...
The cognitive radio enabled IEEE 802.22 wireless regional area network (WRAN) is designed to opportunistically utilize the unused or under-utilized TV bands. However, due to the lack of proactive security protocols and proper interaction policies among the secondary networks themselves, the IEEE 802.22 networks are vulnerable to various denial-of-service (DoS) threats. In this paper, we study the...
This paper addresses the detection of faults in Air Intake Systems (AIS) of SI gasoline engines based on realtime measurements. It presents comparison of two classes of models for fault detection, namely those using a Mean Value Engine Model (MVEM) involving variables averaged over cycles and Within Cycle Crank-angle-based Model (WCCM) involving instantaneous values of variables changing with crank...
Advances in technology leads to dramatic lowering of MOSFET channel length. However short channel effects (SCE) degrade device performance and put a limit to scaling down of device dimensions. Drain induced barrier lowering (DIBL) is such an effect where threshold voltage rolls off and sub-threshold current increases significantly. Study of the surface potential is important for understanding DIBL...
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