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Parmar, G.
- An Analysis to Design Merged Delay Transformed Iir down Sampler Filter:An Efficient down Sampler Filter Architecture
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Authors
Affiliations
1 Department of Electrical Engineering, Modi Institute of Technology, IN
2 Department of Electronics and Communication Engineering, Rajasthan Technical University, IN
1 Department of Electrical Engineering, Modi Institute of Technology, IN
2 Department of Electronics and Communication Engineering, Rajasthan Technical University, IN
Source
ICTACT Journal on Microelectronics, Vol 1, No 3 (2015), Pagination: 101-114Abstract
An efficient architecture of Down Sampler Filter using Merged Delay Transformed Technique in terms of cost reduction and increase throughput has been proposed. The stability analysis of Merged Delay Transformed filters, finite word length effect on Transformed filters as well as conventional filters and peak error between the output from transformed IIR filters and from conventional filters have been investigated on the basis of commercially available software and mathematical calculations. The Butterworth, Chebyshev-1, Chebyshev-2 and Elliptic filters have been considered in this paper for the sake of comparison. The simulation results show that 84.59%, 73.56% and 50.83%&78.71%, 73.85% and 51.89% reduction in cost can be achieved with different specifications by using the proposed scheme when it is compared with conventional FIR filter, conventional IIR filter and conventional polyphase IIR filter, respectively. It has been elaborated that the stability of transformed IIR Decimation filters will not disturb as the Decimation Factor M increases. It is also shown that the transformed Elliptic filter is more stable and the transformed Chebyshev-2 filter is a marginally stable filter. The simulation results show that the peak error is in the range of 10-10 to 10-17 which increases with an increase in order of the filter. On the basis of simulation results and mathematical calculations, it is shown that the decomposition of higher order system into 1st order and 2nd order systems using parallel implementation architecture with Merged Delay Transform increases the processing rate of the filter and a reduction in the cost of implementation as well as peak error.Keywords
Finite Word Length Effect, IIR Down Sampler Filter, Merged Delay Transformation, Stability.References
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- Alan V. Oppenheim, Ronald W. Schafer and John R. Buck, “Discrete-Time Signal Processing”, 2nd Edition, Prentice Hall, 1999.
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- David A. Johns and David M. Lewis, “Design and Analysis of Delta-Sigma Based IIR Filter”, IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, Vol. 40, No. 4, pp. 233-240, 1993.
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- Z.P. Ma and Bosco Leung, “Polyphase IIR Decimation Filter Design for Oversampled A/D Converters with Approximately Linear Phase”, IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, Vol. 39, No. 8, pp. 497-505, 1992.
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- A. Patni and V. Soni, “Merged Delay Transformed IIR Down Sampler Filter: An Efficient Architecture and Cost Reduction Technique for Implementation”, Proceedings of International Conference on Industrial Instrumentation and Control, pp. 159-164, 2015.
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- B.W. Bomar, “Finite Wordlength Effects”, Digital Signal Processing Handbook, 1999.
- A. Patni & V. Soni, “Stability Analysis and Finite Word Length Effect on Merged Delay Transformed IIR Down Sampler Filters”, Proceedings of International Conference on Communications and Signal Processing, pp. 89-94, 2015.
- Hybrid Grey Wolf Optimization-pattern Search (HGWO-PS) Optimized 2DOF-PID Controllers for Load Frequency Control (LFC) in Interconnected Thermal Power Plants
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Authors
Affiliations
1 Department of Electronics and Communication Engineering, Rajasthan Technical University, IN
2 Department of Electrical Engineering, Veer Surendra Sai University of Technology, IN
1 Department of Electronics and Communication Engineering, Rajasthan Technical University, IN
2 Department of Electrical Engineering, Veer Surendra Sai University of Technology, IN
Source
ICTACT Journal on Soft Computing, Vol 6, No 3 (2016), Pagination: 1244-1256Abstract
The combination of Grey Wolf Optimization and Pattern Search Technique (hGWO-PS) has been introduced to optimize the parameters of two Degree of Freedom Proportional-Integral-Derivative Controller (2DOF-PID) for controlling the load frequency in Automatic Generation Control (AGC) for interconnected power system. The interconnected two area power system of non-reheat thermal power plants consisting of 2DOF-PID controller in each area has been considered for design and analysis. Firstly, the proposed approach has been implemented in the aforementioned standard test system and thereafter, the robustness of the system consisting 2DOF-PID controller optimized by proposed technique has been estimated using the sensitivity analysis for the same. The robustness of the system consisting of 2DOF-PID controller optimized by proposed scheme is examined by varying the parameters of standard test system, loading conditions during operation, size and location of the disturbances. The performance of the 2DOF-PID controller optimized by proposed approach has also been compared with recently published approaches in the literature. The simulation results show that the proposed hGWO-PS optimized 2DOF-PID controller shows far better performance than recently published approaches in the literature in terms of dynamic response. The simulation results also show that system performances hardly change when the operating load condition and system parameters are changed by ±50% from their nominal values, i.e. the proposed controllers are quite robust for a wide range of the system parameters and operating load conditions from their nominal values.Keywords
Automatic Generation Control (AGC), Multi-Area Power System, Two Degree of Freedom-PID Controllers (2DOF-PID), Grey Wolf Optimization (GWO), Pattern Search (PS).- Whale Optimized PID Controllers for LFC of Two Area Interconnected Thermal Power Plants
Abstract Views :169 |
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Authors
Affiliations
1 Department of Electronics Engineering, Rajasthan Technical University, IN
1 Department of Electronics Engineering, Rajasthan Technical University, IN
Source
ICTACT Journal on Microelectronics, Vol 3, No 4 (2018), Pagination: 467-472Abstract
This paper elaborates the application of new nature inspired algorithm; ‘Whale Optimization Algorithm (WOA)’ in load frequency control of two area interconnected non-reheat thermal power plants. Two number of PID controllers have been considered in the investigated system and the parameters of the controllers have been tuned/optimized using WOA. The design problem has been formulated as the constrained optimization problem with upper and lower bounds of controller’s parameters. The integral of time multiplied absolute error (ITAE) has been taken as an objective function in the present work. The parameters of controllers (KP, KI, KD), minimum damping ratio (MDR), the values of performance indices (ITAE, ISTE, ISE, IAE), settling times and overshoots of Δf1, Δf2 and ΔPTie have also been evaluated for the system under investigation using WOA. The simulation results include the dynamic responses of Δf1, Δf2 and ΔPTie for different step load changes from 0.1p.u. to 0.5p.u in area 1 by keeping constant 0.1p.u. step load change in area 2. It has been observed that smooth and better dynamic responses with fewer oscillations, less settling times and less overshoots can be achieved for the system using WOA.Keywords
Load Frequency Control (LFC), Two Area Interconnected Non Reheat Power System, PID Controllers, Whale Optimization Algorithm (WOA).References
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- L.C. Saikia, J. Nanda and S. Mishra, “Performance Comparison of Several Classical Controllers in AGC for Multi-Area Interconnected Thermal System”, International Journal of Electrical Power and Energy Systems, Vol. 33, pp. 394-401, 2013.
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- V. Soni, G. Parmar, M. Kumar and S. Panda, “HGWO-PS Optimized 2DOF-PID Controller for Non Reheat Two Areas Interconnected Thermal Power Plants: A Comparative Study”, Proceedings of IEEE Conference on Power Electronics, Intelligent Control and Energy Systems, pp. 23-28, 2016.
- V. Soni, G. Parmar, M. Kumar and S. Panda, “Hybrid Grey Wolf Optimization-Pattern Search (hGWO-PS) Optimized 2DOF-PID Controllers for Load Frequency Control (LFC) in Interconnected Thermal Power Plants”, ICTACT Journal on Soft Computing, Vol. 6, No. 3, pp. 1244-1256, 2016.
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- A Review on the Biological Effects of some Natural Products
Abstract Views :322 |
PDF Views:161
Authors
Affiliations
1 Department of Pharmacy, Sumandeep Vidyapeeth Deemed to be University, Piparia, Vadodara – 391760, Gujarat, IN
2 Parul Institute of Pharmacy & Research, Parul University, Vadodara – 391760, Gujarat, IN
1 Department of Pharmacy, Sumandeep Vidyapeeth Deemed to be University, Piparia, Vadodara – 391760, Gujarat, IN
2 Parul Institute of Pharmacy & Research, Parul University, Vadodara – 391760, Gujarat, IN
Source
Journal of Natural Remedies, Vol 20, No 3 (2020), Pagination: 117-127Abstract
This review is a compilation of a number of preclinical studies of the natural products for their biological activities. Many natural products studied for their biological activities are either in the form of herbal formulations or plant extracts. They showed antihypertensive, antilipidemic, antidiabetic, antioxidant, antianxiety, hepatoprotective, and many other activities. Many post graduate and doctoral students took part in studying the biological activities of these natural products. This comprehensive review will give an impetus for young research workers to explore the possibility of more biological activities on these natural products for the future studies to combat diseases.Keywords
Antioxidants, Hepatoprotective, Herbal Medicine, Ischemia Reperfusion, Natural Products, Type 2 Diabetes.References
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- Patil L, Balaraman R. Protective effect of green tea extract on doxorubicin induced cardiotoxicity in rats. Oriental Pharmacy and Experimental Medicine. 2005; (5):137–43. https://doi.org/10.3742/OPEM.2005.5.2.137
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- Patil LJ, Balaraman R. Green tea extract protects doxorubicin induced testicular damage in rats. International Journal of PharmTech Research. 2009; 1(3):879–84.
- Bafna PA, Balaraman R. Antiulcer and antioxidant activity of Pepticare, a herbomineral formulation. Phytomedicine 2005; 12(4):264–70. https://doi.org/10.1016/j.phymed.2003.12.009. PMid:15898703
- Koneri R, Balaraman R, Saraswati CD. Antiovulatary, Abortifacient potential of the ethanolic extract of ischolar_mains of Momordica cymbalaria Fenzl in rats. Indian Journal of Pharmacology. 2006; 8(2):111–14. https://doi.org/10.4103/0253-7613.24616
- Koneri R, Saraswati CD, Balaraman R, Ajeesha EA. Anti-implantation activity of the ethanolic ischolar_main extract of Momordica cymbalaria Fenzl in rats. Indian Journal of Pharmacology. 2007; 39: 90–6. https://doi.org/10.4103/0253-7613.32527
- Balaraman R, Koneri R. Antidiabetic mechanisms of Saponins of Momordica cymbalaria. Pharmacognosy Magazine. 2008; 4(15):197–206.
- Koneri R, Balaraman, Firdous, Kumar MV. Hepatoprotective effects of Momordica cymbalaria Fenzl. against carbon tetrachloride induced hepatic injury in rats). Pharmacologyonline. 2008; 1:365–74.
- Dangwal S, Mohan M, Balaraman R. Antihypertensive effect of Trigonella foenum- greacum seeds in experimentally induced hypertension in rats. Pharmaceutical Biology. 2006; 44(8):1–8. https://doi.org/10.1080/13880200600896538
- Mohan M, Kasture SB, Balaraman R. Anxiolytic activity of standarised extract of Korean ginseng – a study on exploratory behaviour. Oriental pharmacy and Experimental Medicine. 2005; 5(4):301–7. https://doi.org/10.3742/OPEM.2005.5.4.301
- Zalawadia R, Balaraman R. Inhibitory effects of Tinospora cordifolia and Rubia cordifolia Linn. on egg albumininduced experimental allergic conjunctivitis in rats. Oriental Pharmacy and Experimental Medicine. 2009; 9:58–66. https://doi.org/10.3742/OPEM.2009.9.1.058
- Zalawadia R, Balaraman R. The protective effect of Tinospora Cordifolia Linn. on various mast cell-mediated allergic reactions. Pharmaceutical Biology. 2009; 47(11):1096–106. https://doi.org/10.3109/13880200903008690
- Gandhi C, Upaganlawar A, Balaraman R. Protection against in vivo focal myocardial ischemia/reperfusion injury-induced arrhythmias and apoptosis by Hesperidin. Free Radical Research. 2009; 43:817–27. https://doi.org/10.1080/10715760903071656. PMid:19579067
- Gandhi C, Zalawadia R, Balaraman R. Hesperidin improves warm Ischemia/Reperfusion-Induced Oxidative Renal Injury in Rats. Oriental Pharmacy and Experimental Medicine. 2009; 9:292–302. https://doi.org/10.3742/ OPEM.2009.9.4.292
- Upaganlawar A, Balaraman R. Cardioprotective effects of Lagenaria siceraria fruit juice on isoproterenol induced myocardial infarction in Wistar Rats: A biochemical and histoarchitecture study. Journal of Young Pharmacists. 2011; 3:297–303. https://doi.org/10.4103/0975-1483.90241.
- PMid:22224036. PMCid:PMC3249742
- Upaganlawar A, Patel V, Balaraman R. Tomato lycopene attenuates myocardial infarction induced by isoproterenol: Electrocardiographic, biochemical and anti-apoptotic study. Asian Pacific Journal of Tropical Biomedicine. 2012; 2:345–51. https://doi.org/10.1016/S2221-1691(12as)60054-9
- Parmar G, Pundarikakshudu K, Balaraman R. Antianaphylactic and antithmatic activity of Euphorbia thymifolia L. on experimental animals. Journal of Traditional and Complementary Medicine. 2019; 9(1): 60–5. https:// doi.org/10.1016/j.jtcme.2018.03.002. PMid:30671367. PMCid:PMC6335472
- Parmar G, Pundarikakshudu K, Balaraman R, Sailor G. Amelioration of anaphylaxis, mast cell degranulation and bronchospasm by Euphorbia hirta L. extracts in experimental animals. Beni-Suef University Journal of Basic and Applied Sciences. 2018; 7(1):127–34. https://doi.org/10.1016/j.bjbas.2017.11.001
- Parmar GR, Pundarikakshudu K, Balaraman R. Antidiabetic and antihyperlipidemic activity of Euphorbia thymifolia L. extracts on streptozotocin-nicotinamide induced type 2 diabetic rats. Journal of Applied Pharmaceutical Science. 2017; 7(08):78–84.
- Shukla D, Maheshwari RA, Patel K, Balaraman R, Sen AK. Effect of Vaccinium macrocarpon on MK801 induced psychosis in mice. Indian Journal of Pharmacology. 2018; 50:227–35. https://doi.org/10.4103/ijp.IJP_74_17. PMid:30636825. PMCid:PMC6302693