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In Named Data Networking (NDN), routers have caches to store frequently requested contents, and hence cache management scheme becomes a key factor for efficient content delivery. In this paper, we propose the sharing of cache summaries using a Bloom filter among neighboring routers for efficient content delivery and high cache utilization at NDN. When an Interest packet is received, a router can forward...
Z-Source inverters can overcome some of the limitations, inherent in traditional Voltage Source and Current Source Inverters and can provide boosted outputs. Most of the literature on Z-source inverters deals with 3-phase or 1-phase bridge inverters. This paper proposes a Single-Phase Z-Source Push-Pull Inverter topology. This scheme has several advantages compared to basic Z-source full-bridge inverter...
In this paper, we present a distributive target-centric formation controller with saturated control action for multiple unmanned aerial vehicles (UAVs). The desired target-centric formation is maintained using consensus protocol. We show that if there exists at least one vehicle in the group of agents who has the complete target information and corresponding communication graph is connected, then...
Real-time systems handle data in binary form and these systems should be catered with efficient circuits for fast data accessing and data processing. In this paper, a high speed architecture has been proposed to determine both the value and the address of the maximum/minimum element from an nelement set of k-bit size. The proposed solution performs the data finder and address finder operations in...
This paper introduces a modified single-stage power factor correction (S2PFC) converter topology for high voltage, power and frequency (HVPF) applications which improves the power quality at utility AC side and at the load end. The modified proposed converter possess the ability of controlling the voltage and frequency independently and also simultaneously. The voltage can be controlled by PWM technique...
Vehicular networks reflect user mobility behavior and present complex microscopic and macroscopic mobility patterns. Microscopic mobility is often simplified in macroscopic systems and we argue that its impact is too largely neglected. Notwithstanding improvements in realistically modeling and predicting mobility, few vehicular traces - especially complex microscopic ones - are available to validate...
Multilevel inverters are of special importance in high power and medium power applications. Reduced distortion, better output power quality, minimum switching losses, reduced switching stress make multilevel architecture preferred. This paper demonstrates a new topology of a 9-level and 15-level inverters which requires less number of power switches and as well as DC voltage sources than that of existing...
In recent days, the quality of power has become more important to the most of the customer load. The unified power quality conditioner (UPQC) is the ultimate solution to provide the quality of power irrespective of the type of power quality problems. The UPQC can improve the quality of power for all end users, but it will not provide the power quality at different demand levels. Another topology Open...
There are many topologies of solar charging station for electric vehicles, using DC or AC current to charge, which increases the uses of DC-DC and DC-AC converters. The main idea of this article is to reduce the number of DC-DC converters in an AC charging station. In the light of this vision, this work proposes a topology with their managing unit. To this end, the operating characteristics and performance...
This paper investigates the eavesdropping attacks in underwater acoustic networks (UANets). In particular, we propose an analytical framework to model the eavesdropping attacks in UANets in terms of the eavesdropping probability. Results of extensive simulations match the analytical results, indicating the effectiveness and accuracy of our model. Besides, we also find that the eavesdropping probability...
Sigma-Delta Analog-to-Digital converter (ADC), is widely used in portable electronic products. An operational transconductance amplifier (OTA) is one of the most important components of this ADC. This paper reports a new design of low power fully differential OTA. In this design authors have used adaptive biasing technique and DC gain enhancement technique for improving design parameters as compared...
As the wireless power transfer (WPT) technology has been proved to be a convenient and reliable charging method to plug-in hybrid electric vehicles and electric vehicles, the loosely coupled transformer structure and size are the primary and fundamental concern to design an efficient WPT system. In this paper, a double D (DD) coil and a unipolar coil are selected to conduct the study. We focus on...
Delay estimation is considered as one of the critical issues in the development of any Very Large Scale Integration (VLSI) design algorithms. It is also known as one of the factors to analyze in the design of high performance integrated circuit. Neither of these is usually applied to observe the performance of various VLSI topologies. High performance integrated circuits often use adders to achieve...
The outstanding power quality problems including three-phase voltage unbalance and large reactive power have drawn more and more attention of railway company and power system. Moreover, the neutral section insulators at exits of substations affect the safety and efficiency of the electric trains, especially in high speed railway and heavy haul railway. A new traction power supply system adopting Vx...
Wireless sensor networks are extremely limited in terms of resources. Resource limitation includes limited energy rate, short range communication, low bandwidth, limited memory capacity and processing in every single sensor. Therefore, it is essential to use routing algorithms which lead to energy consumption reduction and suitable bandwidth efficiency. The proposed algorithm layered the sensor network...
In this paper, a simple filter topology that can be used to implement first-order MOS-only allpass filter is proposed. The proposed MOS-only allpass filter offers inherently very accurate magnitude and phase characteristics at very high frequencies. However, MOS-only active filter suffers from an inherent low frequency limitation. In order to address this issue, the modification technique allowing...
In this paper a grid connected photovoltaic (PV) flyback inverter operating in discontinuous conduction mode (DCM) is used to test a hybrid maximum power point tracking (MPPT) method. Moreover, the design procedure of a flyback inverter is also presented as part of this paper. The proposed hybrid MPPT method is a combination of fractional short circuit current(FSCC) and hill climbing (Perturb and...
In this paper, an improved Cascaded Multi-Level Inverter (CMLI) topology which can be "symmetric" or "asymmetric" is proposed. The improved topology can produce higher number of levels using lower number of components. Higher number of levels leads to generation of a high quality with low Total Harmonic Distortion (THD) output voltage waveform. To increase number of voltage levels,...
In this paper an induction motor drive system based on a fault-tolerant cascaded H-bridge converter is presented. The proposed system is composed by an induction motor fed through a 13-level cascaded H-bridge converter. In this case a neutral shift method has been implemented for the CHB converter in order to make it fault-tolerant. The proposed system has been modelled and tested in Matlab-Simulink.
In this paper, we discuss the consensus of discrete-time multi-agent system. Based on the network topology, consensus protocol in discrete-time with dynamic step-size is designed. Conventional algorithms need man made step-size generally, having a great non-natural impact. The new algorithm employs a self-adaptive dynamic step-size based on the network topology, with little non-natural factor, and...
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