Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53440#.VMWuPSzQrzE Author(s)    Aisha Jilani 1 , Sadia Murawwat 1 , Syed Omar Jilani 2   Affiliation(s) 1 Electrical Engineering Department, Lahore College for Women University, Lahore, Pakistan . 2 Electrical Engineering Department, University of Lahore, Lahore, Pakistan . ABSTRACT Machines have served the humanity starting from a simple ceiling fan to higher industrial applications such as lathe drives and conveyor belts. This research work aims at providing an appropriate software based control system because it provides computer featured applications, prevents rapid signal loss, reduces noise while also significantly improves the steady state and dynamic response of the motor. In this research paper, we have worked on DC motors due to its significant advantages over other types of machine drives. We have first individually studied Fuzzy and AN...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53226#.VLhyzcnQrzE Author(s)    Ali Ahmadi , Mohammad Raouf Hosseini Affiliation(s) Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran . ABSTRACT Multiplicity of the chemical, biological, electrochemical and operational variables and nonlinear behavior of metal extraction in bioleaching environments complicate the mathematical modeling of these systems. This research was done to predict copper and iron recovery from a copper flotation concentrate in a stirred tank bioreactor using a fuzzy logic model. Experiments were carried out in the presence of a mixed culture of mesophilic bacteria at 35°  C, and a mixed culture of moderately thermophilic bacteria at 50°  C. Input variables were method of operation (bioleaching or electrobioleaching), the type of bacteria and time (day), while the recoveries of copper and ...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53226#.VLcsacnQrzE Author(s)    Ali Ahmadi , Mohammad Raouf Hosseini Affiliation(s) Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran . ABSTRACT Multiplicity of the chemical, biological, electrochemical and operational variables and nonlinear behavior of metal extraction in bioleaching environments complicate the mathematical modeling of these systems. This research was done to predict copper and iron recovery from a copper flotation concentrate in a stirred tank bioreactor using a fuzzy logic model. Experiments were carried out in the presence of a mixed culture of mesophilic bacteria at 35°  C, and a mixed culture of moderately thermophilic bacteria at 50°  C. Input variables were method of operation (bioleaching or electrobioleaching), the type of bacteria and time (day), while the recoveries of copper and ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52358#.VJN7GcCAM4 Author(s) Kondakkagari Dharma Reddy , Pathi Venkataramaiah , Tupakula Reddy Lokesh Affiliation(s) Department of Mechanical Engineering, S. V. University, Tirupati, India . ABSTRACT The usage of phase change materials (PCM) to store the heat in the form of latent heat is increased, because large quantity of thermal energy is stored in smaller volumes. In the present experimental investigation, sodium thiosulphate pentahydrate is employed as phase change material and it is stored in stainless steel capsules. These capsules are kept in fabricated tank and hot water is supplied into it. The experimental design is ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52259#.VI5JkcnQrzE Author(s) Sri P. Mohana Reddy , Pathi Venkataramaiah , Devuru Vishnu Vardhan Reddy Affiliation(s) Department of Mechanical Engineering, SV University, Tirupati, India . ABSTRACT This paper focused on selection of best materials for absorber tube and reflective surfaces of Solar Parabolic Collector (SPC) using fuzzy logic, after analysing the material data. The glass mirror and Aluminium absorber have been identified as best materials. These selected materials are replaced in existing experimental setup. An experimental design is prepared based on the considered parabolic collector parameters: Absorptivity, Re...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=51007#.VFHXblfHRK0 Author(s) Mapathe Ndiaye , Seydou Coulibaly , Winimi Saratou Zouwinaba , Issa Ba Affiliation(s) Laboratoire de Mécanique et Modélisation, University of Thies, Thies, Senegal . ABSTRACT The vertical electrical soundings on the Matam region phosphates deposits are interpreted by inversion. To retrieve lithology from the obtained resistivities, mechanical drilling was performed to compare directly the lithologies and the geoelectrical resistivities. The obtained relation is not simple and is not sufficient to interpret all the VES. This situation motivated the collection of supplementary information from cyclostratig...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50627#.VEchMFfHRK0 Author(s)   Jean Marie Ntaganda 1 , Mahamat Saleh Daoussa Haggar 2* , Benjamin Mampassi 3 Affiliation(s) 1 Department of Applied Mathematics, School of Pure and Applied Sciences, College of Science and Technology, University of Rwanda, Kigali, Rwanda . 2 N’Djamena University, N’Djamena, Chad . 3 Cheikh Anta Diop University, Dakar, Senegal . ABSTRACT This paper aims at using of an approach integrating the fuzzy logic strategy for hypoxemic hypoxia tissue blood carbon dioxide human optimal control problem. To test the efficiency of this strategy, the authors propose a numerical comparison with the direct met...