Volume 2, Issue 8, November 2011
Retailers Risk Management in Modern Competitive Power Systems
Mohammad Sadegh Javadi, Rahmat Azami, Amin Javadinasab and Ghasem Hematipour
Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Fars, Iran
Department of Electrical Engineering, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
Abstract– This paper addresses a new approach for hedging risk of retailers in deregulated power market. In the presented methodology, both fixed and floating future contracts are considered. There are two components of supply that markets must address: energy and capacity. Energy is the energy content of electricity that is delivered to a specified bus. Capacity is output availability of physical units. In this paper, we concentrate on wholesale financial products that producers and retailers utilize to manage financial risk. Aside from producers and retailers, financial institutions are also market participants in midterm markets. Financial products are contracts that do not result in the physical delivery of energy or the physical exchange of capacity between the counterparties. They are contracts that fix the cost of supply for both products through financial settlement. This paper provides a description of common financial products. Prices utilities paid for electricity they sold to consumers—were determined in an auction run by a “power exchange,” in which retailers purchased electricity from wholesale suppliers, should not be generally more than a day in advance of the delivery date. In this paper we are presenting a methodology in order to hedging the retailers risk in the power market.
Keywords—Retailer, Wholesale Market and Risk Management
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Vibration Two Type Functionally Graded Cylindrical Shell
Mohammad Reza Isvandzibaei and Ali. Moarrefzadeh
Mechanical Engineering Department, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Abstract– Study on the vibration of cylindrical shell made of a functionally gradient material (FGM) composed of stainless steel and nickel is presented. The effects of the FGM configuration are studied by studying the frequencies of two FGM cylindrical shells. Type I FGM cylindrical shell has Nickel on its inner surface and stainless steel on its outer surface and Type II FGM cylindrical shell has stainless steel on its inner surface and nickel on its outer surface. The study is carried out based on third order shear deformation shell theory. The objective is to study the natural frequencies, the influence of constituent volume fractions and the effects of configurations of the constituent materials on the frequencies. The properties are graded in the thickness direction according to the volume fraction power-law distribution. The governing equations are obtained using energy functional with the Rayleigh-Ritz method. Results are presented on the frequency characteristics, the influence of the constituent various volume fractions on the frequencies for a Type I, II FGM cylindrical shell.
Keywords—FGM, Vibration and Cylindrical Shell
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Supervised Leaning – A Study on Mining with Unbalance Dataset
RamBabu Pemula, Bhukya Shankar Nayak, K. Surekha and Myla Satish Babu
Department of CSE, Nimra Institute of Engineering and Technology, Ongole, India
Department of CSE & IT, Vishu Sree Institute of Technology, India
Abstract– Remote-sensing classification problems, targets the number of mines present are very less compared to with several number of clutter objects. One of the traditional classification techniques usually avoids the unbalance causing performance to suffer accordingly. In contrast, the recently developed infinitely imbalanced logistic regression (IILR) algorithm explicitly addresses class imbalance in its formulation. This algorithm gives the details necessary to employ it for remote-sensing data sets characterized by class imbalance. The method is applied to the problem of mine classification on three real, measured data sets. Specifically, classification performance using the IILR algorithm is shown to exceed that of a standard logistic regression approach on two land-mine data sets collected with ground-penetrating radar, and on one underwater-mine data set collected with side-scan sonar.
Keywords—Data Mining, Classification, Imbalance Data and Logistic Regression
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Boiler Thermodynamic Analysis to Reduction Pollution
Amir vosough and Mostafagoodarzi
Department of mechanics, Ahvaz branch, Islamic Azad University, Ahvaz, Iran
Abstract– The most significant energy consumers in energy related industries are boilers and other gas-fired systems. Combustion efficiency term commonly used for boilers and other fired systems and the information on either carbon dioxide (CO2) or oxygen (O2) in the exhaust gas can be used. Efficiency increase and pollutant emission control are the most significant projects of the world. In this paper the incomplete combustion process has solved and the effect of excess air to boiler pollution has considered. The concept of equilibrium constant and molar balanceused to find unknown coefficient in combustion products. The conclusion shows there is an optimum for excess air to reduce boiler pollution and increase boiler efficiency. The conclusion also shows to reduce mole fraction of NO, CO2 and CO in a gas fired boiler, the excess must be about 10 percent.
Keywords—Excess Air, Boiler Efficiency and Pollution (NO, CO, CO2)
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Exergy Analysis of Forced Convection Through an Elliptical Duct with Internal Longitudinal Fins
Alireza Falahat
Department of Mechanics, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Abstract– In the present study, the exergy transfer characteristics of forced convection through an elliptical duct with internal longitudinal fins under constant wall heat flux for hydrodynamic and thermally fully developed laminar flow have been considered. Affecting parameters such as heat flux rate, Reynolds number, aspect ratio (α*) and relative length of fin (L*) are studied for exergy destruction. It is concluded that with the increasing relative length of fin (L*) values, non-dimensional exergy flux and non-dimensional heat transfer rate at fixed Reynolds number increases, with increasing wall heat flux values, non-dimensional exergy flux increases, however, non-dimensional heat transfer rate decreases and with increasing aspect ratio (α*) values, total non-dimensional exergy flux and non-dimensional heat transfer rate at fixed Reynolds number decreases.
Keywords—Exergy, Laminar Flow, Elliptical Duct with Longitudinal Fin and Constant Wall Heat Flux
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FaceMovie - A Novel Approach to Post the Mining Classification Data
Venkata Ramana Adari, Ch. Diwakar and P. Suresh Varma
Department of Computer Science Engineering, Chaitanya Engineering College, Visakhapatnam, AP, India
Department of Computer Science Engineering, Visakha Institute of Engineering & Technology, Visakhapatnam, AP, India
Department of Computer Science, Aadikavi Nannayya University, Rajahmundry, AP, India
Abstract– Social Network sites make it possible to search large amounts of data for characteristic rules and patterns. If applied to monitoring data recorded on a real time data or Business in a network, they can be used to post the in network site database. In this paper, we present “Supervised learning” a method to cascade the decision tree learning methods to classifying into either family oriented, comedy, romantic, horror activities in a social network site. we can used to build any one of the decision tree such as (ID3, C4.5, CART), here the decision tree on each dataset refines the decision boundaries by learning the subgroups within the database. Our work studies the best algorithm by using classifying movies oriented activities in Social network database with supervised algorithms that have not been used before. We analyses the algorithm that have the best efficiency or the best learning and describes the proposed system of ID3 Decision Tree.
Keywords—Supervised Learning, Social Networks, Decision Tree, Facebook and Batabase
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Finite-Element Simulation of Resistance Welding Process
Ali. Moarrefzadeh
Department of Mechanical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Abstract– Resistance welding is a fusion welding process that requires the application of both heat and pressure to achieve a sound joint. The simplest form of the process is spot welding where the pressure is provided by clamping two or more overlapping sheets between two electrodes. In this paper, the Resistance Welding is studied and Steel temperature field is gained in this process. The thermal effect of Resistance Welding that specially depends on the electrical and temperature field of it in workpiece, is the main key of analysis and optimization of this process, from which the main goal of this paper has been defined. This paper reports the determination of optimum welding conditions (welding intensity and travel speed) for butt joints of Steel Alloys sheets using Resistance Welding. Numerical simulation of welding process in SIMPELC method and by ANSYS software for gaining the temperature field of workpiece, the effect of parameter variation on temperature field and process optimization for different cases are done.. The influence of the welding parameter for each mode on the dimensions and shape of the welds and on their ferrite contents is investigated.
Keywords—Finite-Element, Resistance, Dimensional, Welding, Temperature Field and Fusion
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Generation Maintenance Scheduling Considering Short-term Operational Constraints
Mohammad Sadegh Javadi, Ali Esmaeelnejad, Rahmat Azami, Amin Javadinasab and Ghasem Hematipour
Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Fars, Iran
Department of Electrical Engineering, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
Abstract– Generation units’ maintenance scheduling in power system implemented to maintain the system reliability. Because this planning implemented by the system operator in an integrated way, it is necessary to take into account the operational constraints. One of the problems in mid-term planning which includes maintenance scheduling is the coordination between different maintenance teams and also operation technical constraints. The competition issue and liberalization in the electricity industry and conferment maintenance scheduling and coordinating these tasks with other procedures are the most significant issues which system operator and experts encounter with them. In this paper, generation maintenance scheduling problem is taking into account and formulated in mathematical optimization representation. In order to illustrate the feasibility and robustness of the presented approach we address the Iran's power generation maintenance scheduling considering both energy and short-term reserve margin.
Keywords—Maintenance Scheduling, Probabilistic Simulation and Reliability
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PLC and its Applications
Sadeghvosough and Amir vosough
Department of Electronics, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Department of mechanics, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Abstract– In this paper about the important concept of PLC and its application has been discussed. Early PLCs were designed to replace relay logic systems. These PLCs were programmed in "ladder logic", which strongly resembles a schematic diagram of relay logic. The main difference from other computers is that PLCs are armored for severe conditions (such as dust, moisture, heat, coldetc) and have the facility for extensive input/output (I/O) arrangements. PLC applications are typically highly customized systems so the cost of a packaged PLC is low compared to the cost of a specific custom-built controller design. On the other hand, in case of mass-produced goods, customized control systems are economic due to the lower cost of the components, which can be optimally chosen instead of a "generic" solution, and where the non-recurring engineering charges are spread over thousands or millions of units.
Keywords—PLC-Feathers, Application of PLC and Ladder Logic
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Numerical Modeling of Friction Welding Process
Ali. Moarrefzadeh
Department of Mechanical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Abstract– Friction welding is a solid state joining process which can be used to join a number of different metals. Friction welding achieves 100 per cent metal-to-metal joints, giving parent metal properties. It is the only joining process to do this. No addition material or fillers are required and there are no emissions from the process. The thermal effect of friction welding that specially depends on the friction type and temperature field of it in workpiece, is the main key of analysis and optimization of this process, from which the main goal of this paper has been defined. Numerical simulation of welding process in SIMPELC method and by ANSYS software for gaining the temperature field of carbon steel, the effect of parameter variation on temperature field and process optimization for different cases of electrode done.
Keywords—Numerical Simulation, Friction, Weld, SIMPLEC, ANSYS, Temperature Field and Carbon Steel
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Role of Customers and Markets in Project Management
Reza vosough and Amir vosough
Department of Industrial Engineering, Ahvaz branch, Islamic Azad University, Ahvaz, Iran
Department of Mechanical engineering, Mahshar Branch, Islamic Azad University, Mahshar, Iran
Abstract– In this article about the role of customers and markets in project management lifecycle has been discussed. For this reason the tools of project manager has defined and the role of customers and markets in project management in all of project phases that include all of inputs tools and out puts has considered.
Keywords—Project Management, Customer Factor, Marketing Factor and Life Cycle
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Analysis Variation Thickness with Stainless Steel
Mohammad Reza Isvandzibaei and Ali. Moarrefzadeh
Mechanical Engineering Department, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Abstract– In the present work, study of thin cylindrical shells made of a stainless steel is presented. Material properties are graded in the thickness direction of the shell. The objective is to study the natural frequencies a cylindrical shell. The study is carried out using third order shear deformation shell theory. The analysis is carried out using Hamilton’s principle. The governing equations of motion of cylindrical shells are derived based on shear deformation theory. Results are presented on the frequency characteristics and the effects of boundary conditions.
Keywords—Cylindrical, Shell and Stainless Steel
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Ontology Construction from Relational Database
Abdul Jaleel, Shahid Islam, Asim Rehmat, Amjad Farooq and Adnan Shafiq
Rachna College of Engineering & Technology, Gujranwala-Pakistan
University of Engineering & Technology, Lahore-Pakistan
Abstract– This research presents our work to construct Ontologies from relational databases. We have reviewed the existing rules for mapping database schema into ontology schema and consequently updated the mapping rules to accommodate the various missing cases. A real world relational model, the university course registration and fee collection, has been used to demonstrate the mapping of relational data model into ontology concepts. Our example relational model contains every possible construct of the database schema and we have demonstrated the conversion of each construct into ontology using our information system example.
Keywords—Semantic Web Services, Ontology, Relational Database and Construction
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