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RA 123 s: Three metaphor-less Algorithms for Economic Load Dispatch Solution
Manam Ravindra,Sangu Ravindra,Pamidi Lakshminarayana,Karri Manoz Kumar Reddy 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.2
This paper presents Rao-1, Rao-2 and Rao-3 algorithms (RA-123) approach to elucidate Economic Load Dispatch (ELD) problem which has Ramp Rate (RRL), Valve Point Eff ect (VPE), Prohibited Zones of Operation (POZ), and losses of lines. Besides most of the algorithms which depend on algorithmic-specifi c parameters, the proposed algorithm is independent of algorithmic-specifi c parameters. The principle contribution of this paper is to minimize the total generation cost by satisfying several constraints such as generation limits, load demand, valve point loading eff ect, and transmission losses considering metaphor-less algorithms (RA-123). The objective with VPE is considered to improve the performance of ELD. This paper determines the performance of proposed RA-123 algorithms considering diff erent constraints on each test case system and compares them. To explore, ability of proposed optimization algorithms, these are implemented on test networks having 6, 40 and 110 unit systems and outcomes are compared with results attained by prior optimization algorithms. The evaluation of results shows ability and effi cacy of (RA-123) for solving ELD problem.
Ravindra Nath Yadav,Vinod Yadava,G. K. Singh 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.6
Hybrid machining processes (HMPs), having potential for machining of difficult to machine materials but the complexity and highmanufacturing cost, always need to optimize the process parameters. Our objective was to optimize the process parameters of electricaldischarge diamond face grinding (EDDFG), considering the simultaneous effect of wheel speed, pulse current, pulse on-time and dutyfactor on material removal rate (MRR) and average surface roughness (Ra). The experiments were performed on a high speed steel(HSS) workpiece at a self developed face grinding setup on an EDM machine. All the experimental results were used to develop themathematical model using response surface methodology (RSM). The developed model was used to generate the initial population for agenetic algorithm (GA) during optimization, non-dominated sorting genetic algorithm (NSGA-II) was used to optimize the process parametersof EDDFG process. Finally, optimal solutions obtained from pareto front are presented and compared with experimental data.
Experimental Study of Erosion and Abrasion based Hybrid Machining of Hybrid Metal Matrix Composite
Ravindra Nath Yadav,Vinod Yadava 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.
Machining of metal matrix composites (MMCs) are still a challenge for manufacturing industries. Among various machining processes, electrical discharge machining (EDM) and diamond grinding (DG) are more acceptable processes for machining of the MMCs. In this paper, a new compound wheel (CW) is developed in such a way that both processes (EDM and DG) occur in alternate way due to the rotation of wheel. The performance of erosion and abrasion based hybrid machining (EAHM)process has been tested on hybrid aluminium-silicon carbide-graphite (Al/SiC/Gr) composite in terms of material removal rate (MRR) and average surface roughened (Ra). The experiments have been conducted on EDM machine with application of CW for effective spark erosion and abrasive abrasion machining. The effects of pulse current, pulse duration, pulse interval and wheel speed on MRR and Ra has been experimentally investigated and discussed.
Ravindra, Nagawara Seshagirirao,Ramesh, Srinivas Iyer,Gupta, Mahesh Kumar,Jhang, Tripta,Shukla, Ashutosh Kumar,Darokar, Mahendra Pandurang,Kulkarni, Raghavendra Narayanrao 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.1
Patchouli ($Pogostemon$ $patchouli$) is an important, exclusively vegetatively propagated aromatic plant, whose essential oil is widely used in perfumery and cosmetic products. Forty $SC_1$ generation (first generation following $in$ $vitro$ phase) somaclones selected randomly from about 400 somaclones developed from the variety Johore, were multiplied through stem cuttings and evaluated in $SC_2$ and $SC_3$ generations to study the extent of somaclonal variation generated for plant height, herb yield, essential oil content, essential oil yield, and seven constituents of the essential oil. Significant or highly significant somaclonal variation was observed for plant height, herb yield, essential oil content, essential oil yield, and contents of patchouli alcohol, ${\alpha}$-guaiene, ${\alpha}$,${\delta}$-patchoulene, and ${\alpha}$-bulnesene in the essential oil. The number of somaclones significantly superior to the parental variety for plant height, herb yield, essential oil content, and patchouli alcohol content in the essential oil ranged from 8 - 16 and the maximum superiority over the parental variety for these traits ranged from 21 - 79%. Broad-sense heritability estimates of plant height, herb yield, and essential oil content were 0.60 - 0.70 while those of essential oil yield and patchouli alcohol content were 0.44 and 0.47, respectively. Heritability estimates of other studied essential oil constituents were generally low (0.12 - 0.38). A high positive correlation was observed between essential oil yield and herb yield suggesting that selection for herb yield would be effective in improving essential oil yield. Patchouli alcohol content in the essential oil was negatively correlated with all the studied traits. Somaclonal variation, heritabilities of traits, and inter-trait correlations are reported for the first time in patchouli.
Ravindra Nath Singh,M. Maheshwari,Beera Saratchandra 한국잠사학회 2004 International Journal of Industrial Entomology Vol.8 No.1
Pest monitoring through field surveys and surveillance helps in forecasting the population build up of pest. It reduces the load of pesticides application and forms the basis of Integrated Pest Management in sericulture. Common sampling techniques for quantifying pest populations and damage caused by them are reviewed emphasizing the need for quick and simple sampling methods. Various direct and indirect sampling methods for establishing pest populations are discussed and methods have been discussed to use indirect sampling method under IPM programme in sericulture. The use of pheromone lures and traps forms one of the important ingredients of integrated pest management, which calls for integration of all available methods in a cost effective and environmental friendly manner offering consistent efficacy. Silkworms feed on the variety of silk host plants and spin cocoons. Each silk host plant is attacked in the field by number of insect pest species. Several pests are common to mulberry, tasar, oak tasar, muga and eri host plant but pest status and seasonal abundance differs from each crop. The key pests are serious perennially occurring persistent species which cause considerable yield loss every year on large areas and require control measure. Regular occurrence of minor pest is noticed but sudden increase in its population is not known. The occasional pests are sporadic but potential causing sufficient damage. Silk losses due to attack of all the pests have not been calculated. However, information on pest biology and ecology, and control practices being practiced is available but the period of outbreak of major pests and predators on silkworms and its host plant needs to be reinvestigated. Pest and predators forecasting based on surveillance information may provide an opportunity to minimize the losses, particularly to reduce expenditure involved in pest management.
THE DEPENDENCE OF MARKET RETURN VOLATILITY ON TRADING VOLUME IN KOREA AND THAILAND
Ravindra Kamath,Jirayuth Chusanachoti People&Global Business Association 2000 Global Business and Finance Review Vol.5 No.1
The objective of this paper is to examine if the heteroskedasticity in stock market return data can be explained by incorporating trading volume as a mixing variable in the conditional variance equation. This study relies on daily returns and volumes of two developing markets in Asia, namely, the Korean Stock Exchange and the Stock Exchange of Thailand over the 9-year tumultuous period of 1990-1998. The results strongly suggest that the GARCH model adequately describes the two index return series in the absence of volume as a mixing variable. However, the introduction of volume does not succeed in eliminating or for that matter significantly reducing the ARCH and GARCH effects.
Ravindra Singh Chahar,Ravi Kumar B. 국제구조공학회 2019 Steel and Composite Structures, An International J Vol.31 No.4
This paper deals with the effect of ply orientation and control gain on tip transverse displacement of functionally graded beam layer for both active constrained layer damping (ACLD) and passive constrained layer damping (PCLD) system. The functionally graded beam is taken as host beam with a bonded viscoelastic layer in ACLD beam system. Piezoelectric fiber reinforced composite (PFRC) laminate is a constraining layer which acts as actuator through the velocity feedback control system. A finite element model has been developed to study actuation of the smart beam system. Fractional order derivative constitutive model is used for the viscoelastic constitutive equation. The control voltage required for ACLD treatment for various symmetric ply stacking sequences is highest in case of longitudinal orientation of fibers of PFRC laminate over other ply stacking sequences. Performance of symmetric and anti-symmetric ply laminates on damping characteristics has been investigated for smart beam system using time and frequency response plots. Symmetric and anti-symmetric ply laminates significantly reduce the amplitude of the vibration over the longitudinal orientation of fibers of PFRC laminate. The analysis reveals that the PFRC laminate can be used effectively for developing very light weight smart structures.