Formalizing dynamic software updating
Apparent porosity averaged 13% with 0% saw dust and 17% with 40% addition of saw dust bringing them closer to the acceptable range of 20-80%. When comparing the responses, the PID controller provides better performance compared with LQR. Solid density averaged 3.18g/cm3 with 0% saw dust and 2.91g/cm 3 with 40% saw dust, still bringing them closer to the international range of 2.3-3.5g/cm3 . The simulation is done on various values for percentage of volume fraction recrystallization using both the controllers by MATLAB simulink toolbox.  James C ,"Optimization of microstructure development during hot working using control theory,"Metullurgical and Materials Transactions A, Vol 28 A, pp.1921-1930, Sep 1997.
However, they can be used for a great number of other pumping situations. In order to project a better representation of the territory, the samples were mined from ten cites each. The mined clay samples from the ten cites were mixed properly and a representative specimen for test from that location was produced using the cone and quartering system as recommended by the American Society of Testing Materials (ASTM). The results showed that the linear shrinkage improved from an average of 8.57% for the three samples for 0% sawdust to an average of 8.32% with 40% addition of saw dust, bringing them closer to the lower range of the international standard of 7-10%. In the other approach PID controller is employed for the plant model (microstructure development). "Application of control theory principles to optimization of grain size during hot extrusion," Materials Science and Technology, Vol 14, pp.25-31, Jan 1998. Ltd, New Delh Abstract: l Capital of Abuja like linear shrinkage, solid density, apparent porosity and thermal conductivity were characterized with a view of studying the effect of sawdust on them. The state-space model together with an optimality criterion is used to control the percentage of volume fraction recrystallization using Linear Quadratic Regulator method. Atomic Absorption Spectrometer(AAS) was used to determine the chemical composition, while other established processes were used to determine other insulating properties like particle size distribution, specific gravity, bulk density, solid density, water absorption, apparent porosity, permeability to air, refractoriness, thermal shock resistance, modulus of rupture, linear shrinkage and thermal conductivity.
The chemical analysis showed that all the samples had high percentages of silica and alumina, thereby classifying them as Alumino-silicates.
IJERA MENU CALL FOR PAPER PAPER SUBMISSION WHY CHOOSE IJERA AUTHOR INSTRUCTIONS STATISTICS UNIVERSITY AFFILIATES CHECK PAPER STATUS FAQ IJERA CONTENTS CURRENT ISSUE IJERA ARCHIVE SPECIAL ISSUE CALL FOR CONFERENCE UPCOMING CONFERENCE SPECIAL ISSUE ARCHIVE DOWNLOADS MODEL PAPER COPY RIGHT FORM COPYRIGHT INFRINGEMENT JOURNAL ETHICS OPEN ACCESS OPEN ACCESS Abstract: Clay deposits in the Federal Capital Territory of Abuja were investigated with a view to categorizing them in order to determine their suitability as insulating refractory material.
The samples were collected from three different locations in the territory, namely Sheda, Abaji and Karimu, and labeled A, B, and C.
The values for specific gravity, bulk density, solid density and apparent porosity averaged 2.75, 2.04 g/cm3 , 3.18 g/cm3 , and 13% respectively and they were within the internationally accepted range.
The values for linear shrinkage, permeability to air and thermal shock averaged 8.57% 69.4, and 29 respectively and these also were within the accepted limits.
P (1988) Rheological properties of certain Nigerian clay.