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The time synchronization of network will encounter a severe challenge due to the proliferation of scale in wireless sensor networks. In order to improve the precision of time synchronization in network, a time synchronization protocol based on frequency skew bid and dynamic topology (FBDT) is designed in the paper as well as realized on Embedded Linux System. To be able to effectively inhibit synchronization...
We study synchronization of coupled Kuramoto oscillators with heterogeneous inherent frequencies and general underlying connectivity. We provide conditions on the coupling strength and the initial phases which guarantee the existence of a Positively Invariant Set (PIS) and lead to synchronization. Unlike previous works that focus only on analytical bounds, here we introduce an optimization approach...
The Kuramoto oscillator has been widely studied because it can model biological, social, chemical, and engineering problems. Conditions for frequency synchronization of a network of Kuramoto oscillators have been well established, but it depends on the connectivity of the network and on the natural frequencies. In this work we propose a consensus-based control strategy that forces the network to follow...
Dynamic aggregate bandwidth over-reservation is a scalable approach for Quality of Service (QoS) control mechanisms, since surplus of reservation allows for admitting several flows without signaling the network. Our recent work, the Advanced Class-based resource Over-Reservation (ACOR), shows interesting results by significantly reducing QoS control signaling overhead with increased resource utilization...
In a wireless sensor network (WSN), each sensor monitors environmental parameters, and reports its readings to a base station, possibly through other nodes. A sensor works in cycles, in each of which it stays active for a fixed duration, and then sleeps until the next cycle. The frequency of such cycles determines the portion of time that a sensor is active, and is the dominant factor on its battery...
Being able to learn the synchronization behavior of a networked complex system has profound implications for studying and modeling many natural and artificial phenomena, such as the spread of diseases, emergence of social trends, as well as more effective agent based distillation models. In order to study the practicality of learning synchronization behavior, we utilize the spatial iterated prisoner's...
This paper outlines an instance of frequency, time and data networks convergence based on Ethernet technology which can be utilized in smart grid in a cost effective manner. The basic components of this converge network are Ethernet transport, rapid spanning tree protocol (RSTP), synchronous Ethernet and precision time protocol version 2 (PTPv2). RSTP provides loop-free active network topology. Synchronous...
Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier topology. This paper discusses the design and implementation of high fidelity audio class D using sliding mode control scheme. This design method proves to be a cost effective solution for industrial...
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