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International Journal of Research and Reviews in Applied Sciences
ISSN: 2076-734X, EISSN: 2076-7366
Volume 24, Issue 1(July, 2015)
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1. |
FIXED POINT THEOREM FOR THREE ASYMPTOTICALLY NONEXPANSIVE MAPPINGS THROUGH IMPLICIT ITERATIVE SCHEME |
by Anil Rajput, Abha Tenguria & Sanchita Pandey |
Abstract |
In this paper,
a new iterative scheme for approximating common fixed point of three asymptotically
nonexpansive mapping is defined and we have proved weak and strong convergence theorems
in a uniformly convex Banach space. A two-step iteration scheme for asymptotically
nonexpansive mappings in uniformly convex Banach space includes Ishikawa type and
Mann type iterations as special cases. The results obtained in this paper represent
an extension as well as refinement of previous known results.
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Source: |
International Journal of Research and Reviews in Applied Sciences
July 2015-- Vol. 24 Issue 1 -- 2015 |
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2. |
DESIGN AND DEVELOPMENT OF A PUBLIC ADDRESS AUDIO AMPLIFIER |
by Otasowie P.O., Osarogiagbon A.U. & Boi-Ukeme J.O.
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Abstract |
This research work is a design and development of a public address audio amplifier
capable of driving 30watts of power into an 8-ohm speaker. The design is broken
down into four units which are power supply unit, signal processor unit, voltage
amplifier unit and power amplifier unit. The public address audio amplifier was
designed, developed and tested and the results show that the amplifier maintains
low distortion and noise. In addition, the amplifier exhibits strong linear characteristics.
The input and output power was 42watts and 30.25watts while the efficiency was 78.5%,
which shows that the developed amplifier worked satisfactorily.
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Source: |
International Journal of Research and Reviews in Applied Sciences
July 2015-- Vol. 24 Issue 1 -- 2015 |
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3. |
MODELLING COMPRESSIVE STRENGTH OF CONCRETES INCORPORATING TERMITE MOUND SOIL USING MULTI-LAYER PERCEPTRON NETWORKS: A CASE STUDY OF EASTERN NIGERIA |
by Ikechukwu Etienne Umeonyiagu & Chidozie Chukwuemeka Nwobi-Okoye |
Abstract |
In this study termite mound
soil was used as part of concrete mixture. This work shows the development of a
computational model, based on artificial neural networks for the determination of
compressive strength of concrete materials
made by replacing the fine aggregate with
termite mound soil. The work involves
building a multi-layer perception neural network model which uses experimental
data obtained from compressive strength test of concrete made from
termite mound soil. The compressive strength predictions were
compared with predictions from an alternative model based on regression analysis.
The results of the study show that for the
termite mound soil based concrete
the regression model prediction has a correlation coefficient of 0.94402 and a sum
of squares error of 0.72867100, while the neural network model prediction has a
correlation coefficient of 0.94918 and a sum of squares error of 0.07629460. Generally,
the models predicted well, but the neural network model predicted better than the
regression model. The result of the study has adequately demonstrated a cheap, simple,
very quick and accurate alternative to experimental method of concrete strength
determination.
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Source: |
International Journal of Research and Reviews in Applied Sciences
July 2015-- Vol. 24 Issue 1 -- 2015 |
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4. |
PERFORMANCE EVALUATION OF SEIG FOR VARIABLE SPEED WIND ENERGY CONVERSION SYSTEM |
by Jitendra Singh Shakya, Anand, Gurmit Singh & R.K. Saket
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Abstract |
This
paper presents mathematical modelling and performance evaluation of self-excitation
induction generator for variable speed wind energy conversion system. Technical
visits of Madhya Pradesh Wind Farm Limited Devas (MP) have been made to study the
installation, operation, failures causes, maintenance and performance of the wind
power plant. The rating of the experimental test machine i.e. three phase Induction
Motor is 230V, 12.5A, 5.5 hp, 50Hz, 4-pole. The three phase Induction Motor is used
as an induction generator. DC shunt motor is operated as the prime mover of the
experimental setup. Approximate circuit parameters of the induction generator have
been evaluated using no load and block rotor test on experiment machine. Suitable
VAR requirement for excitation and voltage build-up process have been evaluate in
this paper. Various results have been obtained using MATLAB simulink for justification
of the theoretical and experimental results.
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Source: |
International Journal of Research and Reviews in Applied Sciences
July 2015-- Vol. 24 Issue 1 -- 2015 |
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