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Husain Ahmed,Abha Rajoriya 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.5
This paper shows another way to deal with speed control of DC Motor. Two nonlinear controllers, one of sliding mode control and the other Fuzzy gain scheduling PID, characterize another control structure. Essentially, in this configuration procedure, the SMC and Fuzzy gain scheduling PID controller have been consolidated by a switching system which is chosen by the Fuzzy supervisory system. The sliding-mode controller acts essentially in a transient state while the fuzzy gain scheduler PID controller acts in the steady state. The new structure epitomizes the favorable circumstances that both nonlinear controllers offer: a sliding-mode controller provides the fast rise time and fuzzy gain scheduling PID controllers lessening the chattering in the steady state. The simulation results show that utilizing the new hybrid SMC fuzzy gain scheduling PID controller gives "better" system response as far as transient and steady state are concerned when compared with the SMC or fuzzy gain scheduling PID controller’s applications. The controller parameters are tuned with the help of fuzzy logic.
Husain Ahmed,Dr. Abha Rajoriya 보안공학연구지원센터 2014 International Journal of u- and e- Service, Scienc Vol.7 No.5
In this paper, a comparison is made for tuning methods of PID controller to improve the performance of the position control system of DC motor. Firstly, the PID controller is tuned using conventional Ziegler –Nichols method and then by using Simulink Response Optimization tool box available in MATLAB software. Further, Fuzzy gain scheduling of PID controller is investigated in which fuzzy rules are utilized on-line to adapt the PID controller parameters based on the error and its first time derivative. The result shows that the gain scheduling scheme for DC motor position control system have presented superior performance compared to other methods.
Gulam Mohammed Husain,Syed Shoeb Ahmed,Misbahuddin Azhar,Javed Inam Siddiqui,Mohammad Abdul Waheed,Munawwar Husain Kazmi 한국한의학연구원 2017 Integrative Medicine Research Vol.6 No.1
Background: Jawarish Jalinoos (JJ) is a classical semisolid traditional Unani formulation clinically used for the treatment of weakness of vital organs, liver, and stomach. Although JJ has been widely used clinically for several decades, no scientific report is available for its safety. Methods: JJ and its sugar-free tablet version (SFJJ; formulated to target diabetic population) were assessed for safety in rats. Ninety-day repeated dose oral toxicity study was performed as per the Organisation for Economic Co-operation and Development Guideline 408. JJ was orally administered at the dose of 2000 mg/kg bw/d, whereas SFJJ was orally administered at the doses of 506 mg/kg body weight (bw)/d, 1012 mg/kg bw/d, and 2024 mg/kg bw/d for 90 days. The animals were periodically observed for clinical signs of toxicity, mortality, morbidity, body weight changes, and feed consumption. At the end of the study, hematology, clinical biochemistry, electrolytes, gross pathology, relative organ weight, and histological examination were performed. Results: Treatment with SFJJ and JJ showed no significant differences in body weight gain, feed consumption, hematology, clinical biochemistry, and serum electrolytes. No gross pathological findings and differences in relative organ weights were observed between control and drug treated rats. Histological examination revealed no toxicologically significant abnormalities related with SFJJ or JJ treatment. Conclusion: The 90-day repeated dose oral toxicity study demonstrates that the no observed adverse effect level of SFJJ and JJ is greater than 2024 mg/kg bw/d and 2000 mg/kg bw/d (p.o.) in rats, respectively. Both formulations were found to be safe up to the tested dose levels and experimental conditions, and therefore safe for clinical use as specified in the literature.
MIXED TYPE DUALITY FOR CONTROL PROBLEMS WITH GENERALIZED INVEXITY
Husain, I.,Ahmed, A.,Ahmad, B. Korean Society of Computational and Applied Mathem 2008 Journal of applied mathematics & informatics Vol.26 No.5
A mixed type dual to the control problem in order to unify Wolfe and Mond-Weir type dual control problem is presented in various duality results are validated and the generalized invexity assumptions. It is pointed out that our results can be extended to the control problems with free boundary conditions. The duality results for nonlinear programming problems already existing in the literature are deduced as special cases of our results.
MULTIOBJECTIVE CONTINUOUS PROGRAMMING CONTAINING SUPPORT FUNCTIONS
Husain, I.,Ahmed, A.,Rumana, G. Mattoo The Korean Society for Computational and Applied M 2009 Journal of applied mathematics & informatics Vol.27 No.3
Wolfe and Mond-Weir type dual to a nondifferentiable continuous programming containing support functions are formulated and duality is investigated for these two dual models under invexity and generalized invexity. A close relationship of our duality results with those of nondifferentiable nonlinear programming problem is also pointed out.
MIXED TYPE MULTIOBJECTIVE VARIATIONAL PROBLEMS WITH HIGHER ORDER DERIVATIVES
Husain, I.,Ahmed, A.,Rumana, G. Mattoo The Korean Society for Computational and Applied M 2009 Journal of applied mathematics & informatics Vol.27 No.1
A mixed type dual for multiobjective variational problem involving higher order derivatives is formulated and various duality results under generalized invexity are established. Special cases are generated and it is also pointed out that our results can be viewed as a dynamic generalization of existing results in the static programming.
Husain, I.,Ahmed, A.,Rumana, G. Mattoo The Korean Society for Computational and Applied M 2009 Journal of applied mathematics & informatics Vol.27 No.1
A multiobjective variational problem involving higher order derivatives is considered and Fritz-John and Karush-Kuhn-Tucker type optimality conditions for this problem are derived. As an application of Karush-Kuhn-Tucker optimality conditions, Wolfe type dual to this variational problem is constructed and various duality results are validated under generalized invexity. Some special cases are mentioned and it is also pointed out that our results can be considered as a dynamic generalization of the already existing results in nonlinear programming.
MIXED TYPE SECOND-ORDER DUALITY WITH SUPPORT FUNCTION
Husain, I.,Ahmed, A.,Masoodi, Mashoob The Korean Society for Computational and Applied M 2009 Journal of applied mathematics & informatics Vol.27 No.5
Mixed type second order dual to the non-differentiable problem containing support functions is formulated and duality theorems are proved under generalized second order convexity conditions. It is pointed out that the mixed type duality results already reported in the literature are the special cases of our results.
NONDIFFERENTIABLE SECOND ORDER SELF AND SYMMETRIC DUAL MULTIOBJECTIVE PROGRAMS
Husain, I.,Ahmed, A.,Masoodi, Mashoob Korean Society of Computational and Applied Mathem 2008 Journal of applied mathematics & informatics Vol.26 No.3-4
In this paper, we construct a pair of Wolfe type second order symmetric dual problems, in which each component of the objective function contains support function and is, therefore, nondifferentiable. For this problem, we validate weak, strong and converse duality theorems under bonvexity - boncavity assumptions. A second order self duality theorem is also proved under additional appropriate conditions.
Alternatives to Enhance Flat Slab Ductility
Husain, Mohamed,Eisa, Ahmed S.,Roshdy, Ramy Korea Concrete Institute 2017 International Journal of Concrete Structures and M Vol.11 No.1
Flat slab systems are vastly used in multi-story buildings because of their savings in story height and construction time, as well as for their flexibility in architectural remodeling. However, they frequently suffer brittle punching-shear failure around columns, especially when subjected to lateral loads. Therefore, seismic codes labeled flat slabs as non-ductile systems. This research goal is investigating some construction alternatives to enhance flat slab ductility and deformability. The alternatives are: adding different types of punching-shear reinforcement, using discreet fibers in concrete mixes, and increasing thickness of slab around columns. The experimental study included preparation and testing of seven half-scale interior slab-column connections up to failure. The first specimen is considered a reference, the second two specimens made of concrete mixes with different volumetric ratios of polymer fibers. Another three specimens reinforced with different types of punching-shear reinforcement, and the last specimen constructed with drop panel of inverted pyramidal shape. It is found that using the inverted pyramid-shape drop panel of specimen, increases the punching-shear capacity, and the initial and the post-cracking stiffnesses. The initial elastic stiffnesses are different for all specimens especially for the slab with closed stirrups where it is experienced the highest initial stiffness compared to the reference slab.