Volume 6,Issue 2,July 2011
http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/1580
2024-03-29T07:58:23ZSTEADY RADIATIVE FREE CONVECTIVE FLOW ALONG A VERTICAL FLAT PLATE IN THE PRESENCE OF MAGNETIC FIELD
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/548
STEADY RADIATIVE FREE CONVECTIVE FLOW ALONG A VERTICAL FLAT PLATE IN THE PRESENCE OF MAGNETIC FIELD
Karim, Md. Enamul; Uddin, M. J.
Steady two-dimensional Magneto
hydrodynamic free convection flow with thermal
radiation in the presence of magnetic field along a
vertical flat plate is concerned in the present study.
The fluid is taken to be gray, absorbing-emitting
radiation. The non-linear governing equations have
been transformed by the usual similarity
transformation to a system of ordinary differential
equations. These dimensionless similar equations
are then solved numerically employing the
Nachtsheim-Swigert shooting iteration technique
along with sixth order Runge-Kutta integration
scheme. Finally the effects of the pertinent
parameters are examined.
2011-07-01T00:00:00ZSECTIONALLY PSEUDOCOMPLEMENTED RESIDUAL LATTICE
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/547
SECTIONALLY PSEUDOCOMPLEMENTED RESIDUAL LATTICE
Rahman, Md. Zaidur; Azad, Md. Abul Kalam; Hasan, Md. Nazmul
At first, we recall the basic concept, By a
residual lattice is meant an algebra
L = (L,¡ý,¡ü,.,o,0,1) such that
(i) L = (L,¡ý,¡ü,0,1) is a bounded lattice,
(ii) L = (L,.,1) is a commutative monoid,
(iii) it satisfies the so-called adjoin ness property:
(x ¡ý y) . z = y if and only if y ¡Â z ¡Â x o y
Let us note [7] that x ¡ý y is the greatest element
of the set (x ¡ý y) . z = y
Moreover, if we consider x . y = x ¡ü y , then x o y
is the relative pseudo-complement of x with respect
to y, i. e., for . = ¡ü residuated lattices are just
relatively pseudo-complemented lattices. The
identities characterizing sectionally pseudocomplemented
lattices are presented in [3] i.e. the
class of these lattices is a variety in the signature
{¡ý,¡ü,o,1}. We are going to apply a similar
approach for the adjointness property:
2011-07-01T00:00:00ZPOWER SYSTEM STABILIZATION BY FUZZY SET THEORY BASED CONTROL OF SMES
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/546
POWER SYSTEM STABILIZATION BY FUZZY SET THEORY BASED CONTROL OF SMES
Sheikh, Md. Rafiqul Islam; Takahashi, Rion; Tamura, Junji
At present fuzzy logic control is receiving
increasing emphasis in process control
applications. The paper describes the application of
fuzzy logic control in a power system that uses a 12-
pulse bridge converter associated with
Superconductive Magnetic Energy Storage (SMES)
unit. The fuzzy control is used in both the frequency
and voltage control loops, replacing the
conventional control method. The control
algorithms have been developed in detail and
simulation results are presented. These results
clearly indicate the superior performance of fuzzy
control during the dynamic period of energy
transfer between the power system and SMES unit.
2011-07-01T00:00:00ZPERFORMANCE ANALYSIS OF COOPERATIVE RELAYING IN NAKAGAMI-M FADING CHANNELS
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/545
PERFORMANCE ANALYSIS OF COOPERATIVE RELAYING IN NAKAGAMI-M FADING CHANNELS
Barua, B.; Sarkar, M. Z. I.
This paper is concerned with the analysis
of exact symbol error probability (SEP) for
cooperative diversity using amplify-and-forward
(AF) relaying over independent and non-identical
Nakagami-m fading channels. The mathematical
formulations for Probability Density Function (pdf)
and Moment Generating Function (MGF) of a
cooperative link have been derived for calculating
symbol error probability with well-known MGF
based approach taking M-ary Phase Shift Keying
(MPSK) signals as input. The numerical results
obtained from this research have been compared
with different fading conditions. It is observed that
the existence of the diversity link in a relay network
plays a dominating role in error performance.
2011-07-01T00:00:00Z