After that automation electrical power transfer stations towards to
use intelligent electronic devices that are performing multiple
functions : process protection, monitoring, control and use
private companies manufacturers of equipment communicat
ion
protocols, so that need to build electrical smart grid that coordinate his parameters and support his devices.
Search begins definition electrical smart grid and its importance,
and includes the benefit of this electrical smart grid, the requirements and the careers then the specifications of electrical
smart grid, at the end of the search: we compare between the
electrical power transfer stations in electrical traditional grid and
electrical smart grid.
Publish/Subscribe Systems become increasingly important, mainly because they
provide a full decoupling between the publishers and the subscribers, with respect to space,
time, and synchronization. This research presents an overview of publish/subsc
ribe
systems and epidemic algorithms (especially the directed ones), and studies the
performance of directed epidemic algorithms used to ensure the reliability of
publish/subscribe systems. Adopting Scribe system and simulation using OMNET++, the
paper evaluates different directed epidemic algorithms by considering many factors:
targeted range width, number of rounds, number of nodes, and packet loss rate, on each of:
the reliability, overhead, and mean latency.
A lot of research directed its concern to the reliability of Wireless Sensor Networks
(WSNs) used in various applications, especially in early detection of forest fires to ensure
the reliability of warning alarms sent by sensors and reduce the aver
age of false warnings.
In this research we have tried to evaluate the reliability of WSN used in early
detection of fires in Fir and cedar preserve, mainly. By designing hybrid WSN network,
similar to the terrains of the preserve and modeling it using program Opnet14.5. We have
studied several scenarios, to allow increasing malfunction of the network resulting from
fire break out and spreading: starting in allowance of 0% and comparing its results the
results of mathematical equations of reliability according to the same scenarios. In
addition, we have calculated the final availability through suggesting a mechanism to
improve WSN reliability using the redundancy, i.e add sensitive spare nodes, which
replace the damaged ones as the result of fire. The results have proved the remarkable
increasing of reliability. Also, it has been predicted of the reliability of the network
designed according to reliability of different values of the nodes used by using one of the
reliability devices "the Block Diagram".
In this paper, we will design a Fuzzy Smith Predictor (FSP),
then we will model, simulate and analyze it using colored Fuzzy Petri
networks, then we will compare it with a conventional proportional
integral controller.
The main objective of this
research is to reduce the delay time
of the wind turbine system and to increase its reliability, in the other
side, to improve the response and stability of the operating point of
the mechanical energy and reduce vibration caused by the delay time
in the system.
Wireless networks suffer from frequent loss of packets for many reasons such as
interference, collision and fading. This makes wireless medium unreliable medium for data
transfer. The main methods for ensuring the reliability in this medium are usi
ng
transmission control protocol (TCP) and the automatic repeat request (ARQ). Recently,
network coding has been found as new technology that changes the traditional forwarding
method (Store- and- Forward) in the networks to more effective and intelligent method
(Code- and- Forward), which contributes to the increase of both capacity and throughput of
these networks.
In this research, random linear network coding is used as promising technology that
aims to achieve the reliable transfer of data in losing wireless networks, and studying the
enhancement that this technology presents to the performance of these networks in unicast
and multicast transmission. For evaluating the efficiency of this technology and comparing
its performance with the performance of reliable transfer protocols, we use the networks
simulator (NS3). Simulation results showed that random linear network coding achieve the
reliable transfer of data with bigger throughput and less delay and number of transmission
compared with the protocols (TCP, ARQ).
