This paper presents two new intelligent methods to linearize the Multi-Carrier Power Amplifiers (MCPA). One of the them is based on the Neuro-Fuzzy controller while the other uses two small neural networks as a polar predistorter. Neuro-Fuzzy controllers are not model based, and hence, have ability to control the nonlinear systems with undetermined parameters. Both methods are adaptive, low com...

The security of energy systems has always been one the most important issues operation. multi-carrier multi-microgrid (MCMMG) is novel structures in power system. High penetration renewable resources and their uncertainty, ability to operate isolation mode, presence hubs MCMMG increase importance assessment this type This paper presents a decentralized risk-based security-constrained optimal fl...

This paper presents a novel multi-level hierarchical approach which models carrier interactions in international maritime freight transportation networks. Ocean carriers, land carriers and port terminal operators are considered. Port terminal operators, providing transportation services within a port complex, are regarded as a special type of the carrier, based on their behavior. The carriers m...

-The multi-channel technique is a powerful scheme to improve the capacity of wireless network. CSMAC/CA based medium access protocols use carrier sense and RTS-CTS handshake to reduce the collisions of the share channel. In this paper, we propose a new MAC protocol for multi-hop ad hoc networks, which combines the CSMA/CA and Multi-channel techniques. And we call it Multiple Access with Collisi...

IEEE 802.11 MAC is the most commonly used protocol in multi-hop ad-hoc networks which need no infrastructure. In multi-hop ad-hoc networks based on IEEE 802.11, since nodes try transmitting their packets at every possible slot, there is a high packet loss probability. This degrades network performance attributes such as throughput and fairness. In this paper, we focus on achieving the maximum t...

We review recent progress towards increasing solar cell efficiencies beyond the Shockley-Queisser efficiency limit. Four main approaches are highlighted: multi-junction cells, intermediate-band cells, hot carrier cells and spectrum conversion. Multi-junction cells use multiple solar cells that selectively absorb different regions of the solar spectrum. Intermediateband cells use one junction wi...