Signal Processing and Renewable EnergySignal Processing and Renewable Energy
http://spre.azad.ac.ir/
Sun, 22 Apr 2018 19:33:32 +0100FeedCreatorSignal Processing and Renewable Energy
http://spre.azad.ac.ir/
Feed provided by Signal Processing and Renewable Energy. Click to visit.Resource Allocation in Volunteer Computing Networks Based on Node Reliability
http://spre.azad.ac.ir/article_539002_114729.html
Volunteer Computing is a special distributed computational architecture as a network of volunteer computational units connected to each other and organized to perform some specific tasks. These networks are distributed in large networks or even vast geographical areas. Rather than lower communication capabilities in these networks, resource management capabilities are limited than other types of computational networks. In this research, we tried to model resource allocation in these networks considering such limitations. We put node reliability in this model as a factor of how much we can rely on a node to complete an assigned task on specified time and assign one task to multiple nodes in parallel to increase probability of completing task. We model this problem as an economic model to decrease costs and increase revenue on the network based on each tasks priority.Wed, 28 Feb 2018 20:30:00 +0100A New Algorithm (C2-ESPRIT) to Estimate the Direction None Coherent Narrowband Signals with ...
http://spre.azad.ac.ir/article_539003_114729.html
This paper introduces a new algorithm called C2-ESPRIT to estimate the direction of narrow band signals which are none coherent together. This new technique estimates DOAs by dividing receiving signals into two sub array and performing sub-array processing. By processing this signals, a new diagonal matrix will be created. Element of this matrix associated with the main angles of arrival signals and we can use it to estimate the DOA of signals. The main idea in this paper is how to choose the signals sub array and processing method. Unlike the two algorithms ESPRIT and C-SPRIT the result of processing the signals were, respectively, a diagonal matrix and diagonal conjugated matrix, in C2-ESPRIT will appear in the form of the square conjugate diagonal matrix. The advantage of this method compared to ESPRIT and C-SPRIT is reduction the variance, high resolution and requirement of smaller sample in the receiver elements. A new processing algorithm has been proposed based on using all array of received s and taking account of the complex conjugate of second and third elements. We use MATLAB to compare and verify new C2-ESPRIT algorithm efficiency with three known algorithms: Root-Music and ESPRIT and C-SPRIT.Wed, 28 Feb 2018 20:30:00 +0100Analog Circuit Complementary Optimization Based on Evolutionary Algorithms and Artificial ...
http://spre.azad.ac.ir/article_539004_114729.html
In analog circuit optimization, obtaining optimal point that can satisfy various kinds of specifications is posed as goal of design. Utilization of evolutionary algorithms was introduced as a useful method but speed of convergence and ensure to access optimal point are these method most challenges. In this paper the Multi-Layer Perceptron(MLP) artificial neural network is applied to access the suitable point appropriate different specifications values of analog circuit. This point used in optimization algorithm to fined reliable response. Neural network itself is trained by training database is collected during initial optimization process. The link of HSPICE and MATLAB is used for circuit simulation and evaluation during the processWed, 28 Feb 2018 20:30:00 +0100Study on the Material of the Inside Ring Coupler in a Loop Plasma Antenna with Circular Coupler
http://spre.azad.ac.ir/article_539001_114729.html
Plasma antennas are radio frequency antennas that use ionized gas instead of metal conducting element of conventional antenna to transmit and receive signals. In this paper, the effect of changing material of the inside coupler on bandwidth, return loss and radiation pattern at Ultra High Frequency (UHF) band is investigated. The ability to practice of this antenna as transceiver is studied through simulation by using the practical software Computer Simulation Technology (CST) Microwave Studio.Wed, 28 Feb 2018 20:30:00 +0100Designing and Optimization of Hybrid Solar and Wind Turbine, with Superconducting Magnetic ...
http://spre.azad.ac.ir/article_539005_114729.html
Considering the outstanding use of renewable energy sources, most of industrial countries secure a main part of their required energy from renewable energy resources. Solar panels and wind turbines are the most important sources for the scattered production based on Renewable energies. In this study the optimized design of a solar panel, wind turbine hybrid system with SMES, separated from network, to provide for the load demand of a military site is considered. The aim of optimization of the system is to specify number of solar panels, wind turbines, and SMESs with the aim of minimizing the cost of system's energy production. In hybrid systems, due to fluctuations in energy production of solar panels and wind turbines, accumulation systems are used in order to provide for a perpetual load. This system is also used to minimize annual costs of energy production for a system of load demand of a military site with the use of TLBO algorithm on a basis of teach-learn is being studied.Wed, 28 Feb 2018 20:30:00 +0100Application of Valuation Model in Iranian Electricity Distribution Companies
http://spre.azad.ac.ir/article_539006_114729.html
One of the main concern of power system restructuring in developing countries is to divest the asset to private sector. Divestment of electricity distribution companies is more critical and has vital role in the electricity supply chain because of vicinity to customer. This paper tries to develop the company valuation approach of electricity distribution companies. For valuation of these types of companies, Discounted Cash Flow (DCF) model is used and Terminal Value (TV) model is applied to forecast future costs and incomes of companies’ activities in a stable manner. Systematic Risks of these companies are taken into account by using Capital Asset Pricing Model (CAPM). At the end, five Iranian electricity distribution companies are selected and considered technically and economically to obtain their valuations. As a result, these companies are ranked based on their valuations and technical factors with expert weights.Wed, 28 Feb 2018 20:30:00 +0100