In this paper, a new topology for cascaded multilevel inverter based on quasi-Z-source converter is proposed. In the proposed topology the magnitude of output DC voltage is not limited to the sum of magnitude of DC voltage sources. Moreover, the reliability of the circuit due to capability of short circuit by Z-source network is increased. The quasi-Z- source converter in different modes is ana...

The subject of the paper is geometry and topology cosmological spacetimes vector bundles thereon, which are used to model physical fields propagating in universe. Global hyperbolicity factorization properties spacetime bundle that usually independently assumed hold, now derived from a minimal set assumptions based on recent progress differential topology.

Network topology in Mobile Ad Hoc Networks is subject to constant/abrupt change. Source routing algorithms tend not to perform well due to this unstable topology, which invalidates the source routes often, however, the changes in the topology are often local due to the continuous nature of physical movement of nodes. The hypothesis behind this work is that performance of source routing algorith...

We investigate both the hyperbolic action and the determinant ratio action designed to fix the topological charge on the lattice. We show to what extent topology is fixed depending on the parameters of these actions, keeping the physical situation fixed. At the same time the agreement between different definitions of topological charge – the field theoretic and the index definition – is directl...

As the Internet has grown, so has the challenge of accurate measurement and modeling of its topology. Commonly used but coarse methods of measuring topology, e.g., BGP tables, suffer from several limitations. To pursue more accurate empirically-based topology modeling. CAIDA began its Macroscopic Topology Project in 1998, The project focus is actively measuring topology and round trip time (RTT...

Due to the favorable performance of structural topology optimization to create a proper understanding in the early stages of design, this issue is taken into consideration from the standpoint of research or industrial application in recent decades. Over the last three decades, several methods have been proposed for topology optimization. One of the methods that has been effectively used in stru...

Topology control1 in wireless mesh networks is an important problem due to the effects it has on the different layers of the protocol stack [1]. For example, the network connectivity, energy consumption, total physical-link throughput, spatial reuse, and total end-to-end throughput as a function of the network topology have been investigated in [2-6] respectively. In this chapter, we look at th...

P2P computing has emerged as a popular model for utilizing information and resource in Internet. It is built upon an overlay whose topology is independent of the underlying physical network. Because of the mismatch between the overlay and physical network, small number of logical hops may result in a long delay and excessive traffic. In this paper, we propose a universal mechanism-“node swap” t...

In this paper a new topology for Dynamic Voltage Restorer (DVR) with high frequency link is proposed. This topology is able to compensate different types of voltage disturbances such as voltage sag, voltage swell and voltage harmonics. According to the obtained equations, this topology operates as a controllable current source to charge the series capacitor. Due to using High Frequency Transfor...