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The complexity of heterogeneous systems has been increased during last years. One challenge of designing these systems is to deal with the application of methodologies based on Model Driven Architecture (MDA). MDA is a development framework that enables the description of systems by means of different models with transformations. This is an important area of research and consists on developping methodologies...
Dual Tone Multi Frequency signal detection is an important to developing for telecommunication equipment. "This is a standard where keystrokes from the telephone keypad are translated into dual tone signals over the audio link". FPGA has gains very popularity in recent years due to their reprogram ability and flexibility. This paper presents a new type of ZYBO Board ZYNQ 7000 series FPGA...
Integrated renewable energy systems (IRES) are increasingly being installed where the grid extension are considered uneconomical. Modeling of IRES is highly site specific and dependent on locally available renewable energy resources and load profile. This study proposes solar, biomass and biogas based IRES model for remote rural areas in Karnataka, India. For this study, seven villages of Chamarajanagar...
Communication in today's world is made efficient by digital data transmission. The digital communication employs parity generator at the source and parity checker at destination to ensure an error free transmission. This paper proposes the design of a 3-bit reversible even parity checker and generator using the basic reversible gates. The parity checker and generator circuit is designed using the...
With the increase in wireless communication technology, encryption of information sent has become a major concern. This involves both the software level and hardware level encryption. GSM was the first cellular system that paid attention to secure mobile communication. Before the advent of GSM the cellular system had no particular security. The GSM voice calls are encrypted using a family of algorithms...
In this paper, we proposed a new mathematical model of the I-V characteristic of a faulty photovoltaic generator. It presents its behavior in normal and faulty operations. In particular, when its basic components such as cells, bypass and blocking diodes are subjected to the impedance or reversed polarity faults. The developed model of the faulty PV generator will allow studying of the I-V characteristic,...
In this paper, we proposed a new mathematical model of a faulty photovoltaic generator operation. It presents its behavior, when it's subjected to the open-circuit and the short-circuit faults at its basic components as: cells, bypass diodes and blocking diodes. Such kind of modeling will allow developing fault detection and diagnosis methods. Indeed, the proposed model will be used to set normal...
In this paper, we address the communication overhead problem between OpenFlow controllers and switches due to table-miss in a flow table. For dealing with table-miss, the switch informs the controller by sending a packet-in message to make the controller perform further actions. However, this packet-in procedure to deal with table-miss may cause a controller overhead when one controller has to process...
The paper presents the importance of the steam generator in the operation of power plants, stressing the importance of their management and automation to increase energy efficiency of each link in the chain. It presents mathematical model in absolute units from the air preheater. Modelling is based on physical model of the air preheater steam generator, simplifying assumptions adopted and the conservation...
In this paper, a study of a decentralized production of electricity from wind energy is suggested. We propose a mathematical modeling and simulation in MATLAB/Simulink of a wind generator with variable speed. The system considered is composed of a DC machine emulating the turbine, a permanent magnet synchronous machine, and a PWM power converter.
Several linear synchronous generators for the exploitation of sea wave energy have been proposed. Such machines do not require reactive power for the magnetization since they use permanent magnets for the excitation. The use of permanent magnets in a rough environment such as the marine environment may be a very weak point in the application of these kind of devices. In order to overcome this difficulty,...
Continuous vibration energy of vehicle body is converted into heat and dissipated in the air when it is driven. The service life of shock absorber will be reduced at high temperature. An energy regeneration system is designed in this paper to convert vibration energy of vehicle body into electrical energy, which prolongs the driving range of electric vehicle. The dynamic model of shock absorber is...
Photovoltaic (PV) technology permits us to harness and transform solar radiation into electricity. However, PV power generators are still a marginal share in the global power generation capacity. One of the main reasons for it is that PV systems are greatly dependent on the atmospheric conditions affecting their operation. Furthermore, series connection of PV cells is prone to power losses when the...
Challenges of using standard circuit simulators to determine the presence or absence of undesired operating points are discussed. Examples are given of circuits and simulation strategies that show the presence of undesired operating points when they exist but other examples are given that show the same strategies can fail to show the presence of undesired operating points under modestly different...
Simulations with trace dataset and synthetic movement models are the two main methods for measuring routing protocols and QoS schemes in Opportunistic Networks. But the trace dataset cannot meet the needs of all situations and it is notoriously difficult to be collected. Traditional synthetic movement models are easy to be used, but they do not capture the detailed mobile characteristics of the human...
This paper presents a case study of performance comparison between a passive load pull system that uses a vector network analyzer (VNA) as its receiver, and an active load pull system that uses a sampling oscilloscope. The objective of the comparison was to enable parallel research activities between two sites. The two systems are independently used to measure the same device under test, a packaged...
Identifying and removing the undesired stable operating point (also called “Trojan state” in analog circuit) is one of the most important problems in circuit design. In this paper, an innovative divide and contraction verification method against Trojan states is proposed. Unlike the traditional methods to find all operating points, it only targets searching the voltage interval containing undesired...
In this paper, renewable energy, microgrid, charging devices and other areas are discussed, using large-scale charging devices to eliminate the negative the impact of renewable energy to grid stability and power quality. Utilizing available resources to improve the stability of the grid, providing a reference for further research direction based Based on the study of predecessor. The simulation of...
This paper proposes a novel method of suppressing inrush currents of squirrel-cage induction machines using matrix converter in wind power generation systems. In the proposed method, the series-connected side of the matrix converter behaves as a resistor for the induction machine current. Digital computer simulation is implemented to confirm the validity and practicability of the proposed method using...
Size and complexity of power systems impose significant challenges for the power system analysis and control. As the power system becomes more complex there is a great need to develop improved and sophisticated tools for power system analysis and simulation. These tools should be able to accurately replicate real events that occur in electric power network and help to understand dynamics of changes...
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