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Communications in Theoretical Physics 2021年第4期73卷 9-20页

作者： M Gnaneswara Reddy Naveen kumar R b C Prasannakumara N G Rudraswamy K Ganesh kumar Department of Mathematics Acharya Nagarjuna University CampusOngole-523001India Department of Studies and Research in Mathematics Davangere UniversityShivagangothriDavangere-577007KarnatakaIndia Department of Mathematics P.C.Jabin Science CollageHubballi-580031India

This research work explores the effect of hybrid nanoparticles on the flow over a rotating disk by using an activation energy ***,we considered molybdenum disulfide and ferro sulfate as nanoparticles suspended in base fluid *** magnetic field is pragmatic normal to the hybrid nanofluid flow *** derived nonlinear ordinary differential equations are non-dimensionalized and worked out numerically with the help of Maple software by the RKF-45 *** scientific results for a non-dimensionalized equation are presented for both nanoparticle and hybrid nanoparticle *** of various predominant restrictions on flow and thermal fields are *** estimation for friction factor,local Nusselt number and Sherwood number are also *** reveal that the reduction of the heat transfer rate is greater in hybrid nanoparticles when compared to nanoparticles for increasing values of Eckert Number and the thermal field enhances for the enhanced values of volume fraction.

关键词： porous medium MHD hybrid nanoparticles activation energy

OFDM-CFO and Resource Scheduling Algorithm Using Fuzzy Linear-CFO

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Intelligent Automation & Soft Computing 2023年第2期35卷 2513-2525页

作者： M.Prabhu b.Muthu kumar Department of Electronics and Communication Anna UniversityChennai600025India Department of Computer Science and Engineering Syed Ammal Engineering CollegeRamanathapuram623502India

Orthogonal Frequency-Division Multiplexing(OFDM)is the form of a digital system and a way of encoding digital data across multiple frequency com-ponents that are used in telecommunication *** Frequency Offset(CFO)inaccuracy is a major disadvantage of *** paper proposed a fea-sible and elegant fuzzy-based resource allocation technique,that overcomes the constraints of the *** suggested Fuzzy linear CFO estimation(FL-CFO)not only estimates the CFO with increased precision but also allocates resources effectively,and achieves maximum utilization of dynamic *** sug-gested FL-CFO error estimation algorithm in OFDM systems employing 1-bit Quadrate errors ADC(1-bit QE)is utilized to extract the precise ***-ally,the base station(bS)manages the Resource Units(RU),which could be used to distribute resources in such a manner that the user requests are *** assign resources to a certain job,fuzzy rules are *** the residence duration exceeds the resource requirement time then the particular resources are provided to the highest-priority *** a result,the job performance will not be halted due to a lack of allocated *** metrics such as utilization,rate of failure,and life span,as well as energy consumption,are used to assess the pro-posed FL-CFO.

关键词： Orthogonal frequency division multiplexing(OFDM) carrier

Light meson spectrum and their leptonic decay widths in the frame work of constituent quark models

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Chinese Physics C 2010年第9期34卷 1396-1398页

作者： K.b.Vijaya kumar Antony Prakash Monteiro Department of Physics Mangalore University

The phenomenological non-relativistic quark model has been employed to obtain the ground state masses of light vector mesons and their radially excited states and their decay *** full hamiltonian used in the investigation has kinetic energy,the confinement potential and the one-gluon-exchange potential.A good agreement is obtained with the experimental masses and their leptonic decay widths.

关键词： meson spectrum leptonic decay width constituent quark model OGEP

Application of response surface methodology(RSM) for optimization of leaching parameters for ash reduction from low-grade coal

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International Journal of Mining Science and Technology 2018年第4期28卷 617-625页

作者： Sushanta kumar.b.hera Himanshu Meena Sudipto Chakraborty b.C.Meikap Department of Chemical Engineering Indian Institute of Technology (IIT) Kharagpur Department of Chemical Engineering School of Engineering Howard College University of Kwazulu-Natal (UKZN)

Coal is the world＇s most abundant energy source because of its abundance and relatively low cost. Due to the scarcity in the supply of high-grade coal, it is necessary to use low-.grade coal for fulfilling energy demands of modern civilization. However, due to ItS high ash and moisture content, low-grade coal exerts the substantial impact on their consumption like pyrolysis, liquefaction, gasification and combus- tion process. The present research aimed to develop the efficient technique for the production of clean coal by optimizing the operating parameters with the help of response surface methodology. The effect of three independent variables such as hydrofluoric acid （HF） concentration （10-20% by vo!ume ）,. temper- ature （60-100 ~C）, and time （90-180 min）, for ash reduction from the low-grade coal was Investigated.. A quadratic model was proposed to correlate the independent variables for maximum ash reduction at the optimum process condition by using central composite design （CC.D）method. The study reveals that HF concentration was the most effective parameter for ash reduction in comparison with time and temper- ature. It may be due to the higher F-statistics value for HF concentration, which effects to large extent of ash reduction. The characterization of coal was evaluated by Fourier transform infrared spectroscopy （FTIR） analysis and Field-emission scanning electron microscopy with energy-dispersive X-ray （FESEM- EDX） analysis for confirmation of the ash reduction.

关键词： Low-grade coal Hydrofluoric acid (HF)Leaching Ash reduction Response surface methodology

Thermophysical properties of iridium at finite temperature

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Chinese Physics b 2016年第11期25卷 404-411页

作者： Priyank kumar N K bhatt P R Vyas V b Gohel Department of Science Government PolytechnicGandhinagar Department of Physics Sardar Patel University Department of Physics School of Science Gujarat University

The bulk properties of materials in an extreme environment such as high temperature and high pressure can be understood by studying anharmonic effects due to the vibration of lattice ions and thermally excited *** this spirit,in the present paper,anharmonic effects are studied by using the recently proposed mean-field potential（MFP） approach and Mermin functional which arise due to the vibration of lattice ions and thermally excited electrons,*** MFP experienced by a wanderer atom in the presence of surrounding atoms is constructed in terms of cold energy using the local form of the *** have calculated the temperature variation of several thermophysical properties in an extreme environment up to melting *** results of our calculations are in excellent agreement with the experimental findings as well as the theoretical results obtained by using first principle *** conclude that presently used conjunction scheme（MFP＋pseudo potential） is simple computationally,transparent physically,and accurate in the sense that the results generated are comparable and sometimes better than the results obtained by first principle *** pseudopotential used is transferable to extreme environment without adjusting its parameters.

关键词： extreme experienced melting presently excited thermally sometimes understood comparable conclude

Derived signals for S&P CNX nifty index futures

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Financial Innovation 2017年第1期3卷 281-302页

作者： b.Prasanna kumar Department of Economics Davangere University P.G.CentreGuddadarangavvanhalliChitradurgaKarnataka 577502India

background:The financial futures market in India is relatively *** major advantage of derivatives as financial products is that their use minimizes the risks associated with ***,hedging effectiveness requires understanding key market signals such as trading margins,credit availability,and price ***:This study considers the Standard&Poor’s CNX Nifty 50 Index futures for data analysis with the application of V-IGARCH(1,1)two-stage *** purpose for V-IGARCH(1,1)is used to observe the positive effects of credit availability on the variance of futures *** first stage V-IGARCH(1,1)endogenous mean and conditional variance returns are measured with exogenous factors from the second stage V-IGARCH(1,1)*** second stage V-IGARCH(1,1)models specify the market participants’exogenous conditional probabilistic values for ***:In the first stage,it was observed that returns and trading margins,as well as credit availability,were cointegrated,thereby indicating a long-term relationship between *** the first stage of the V-IGARCH(1,1)model,heteroscedasticity with the mean returns through residuals was observed,where the estimated coefficients were *** finding indicated that maximizing returns requires efficient use of trading margins as well as availability of credit *** the second stage regression estimation,it was observed that trading prices and total money supply were directly related,and thus had direct effects on *** total money supply increased gradually until the last trading *** the conditional variance equation,total money supply was related negatively to the availability of credit for market *** these circumstances,the efficient interbank call interest rate was necessary to maintain the trading *** effect,efficient Nifty returns would be ***:This study found that trading margins,credit availability,and price discreteness affect the v

关键词： Signals Credit Margin Discreteness Nifty Returns

Traversing the advantageous role of samarium doped spinel nanoferrites for photocatalytic removal of organic pollutants

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Journal of Rare Earths 2021年第7期39卷 781-789,I0002页

作者： Sneha Singh Paramdeep Kaur Vinod kumar K.b.Tikoo Sonal Singhal Department of Chemistry Panjab UniversityChandigarh160014India HRTEM Facility Lab NIPERSA.S.NagarMohaliPunjab160062India

The present work reportes the pertinence of samarium(Sm) doped spinel nanoferrites as magnetically recoverable photocatalyst for the removal of organic pollutants from ***,a series of Sm substituted spinel nano ferrites,MSm_(x)Fe_(2-x)O_(4)(M=Ni,Co;x=0,0.02,0.06,0.1) we re synthesized via sol-gel *** effect of Sm doping on the structural,morphological,optical and magnetic properties of pristine nanoferrites was investigated ***,the fabricated samples were explored as photocatalysts for the oxidative degradation of antibiotics(ofloxacin and norfloxacin) and dyes(methyl orange and safranin O).The Sm doped nanoferrites exhibit astonishing catalytic efficacy that can be attributed to higher surface area,octahedral site preference of Sm ions and reduced band *** synthesized nanoferrites display excellent recyclability which enables them to be utilized as potential photocatalysts for wastewater treatment.

关键词： Samarium doped nanoferrites Sol-gel Pharmaceutical degradation Recyclability Rare earths

Interleaved high-gain boost converter powered by solar energy using hybrid-based MPP tracking technique

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Clean Energy 2022年第3期6卷 460-475页

作者： S.Nagaraja Rao Suresh kumar Anisetty b.M.Manjunatha b.M.Kiran kumar V.Praveen kumar S.Pranupa MS Ramaiah University of Applied Sciences Department of Electrical EngineeringBangaloreIndia RGM College of Engineering and Technology(Autonomous) NandyalIndia

This paper presents a solar-powered interleaved high-gain boost converter(IHGbC)that increases voltage gain with fewer ripples in the output voltage in comparison to existing DC-DC *** goal of this research is to develop a hybrid-based maximum power point tracking(MPPT)approach with the combination of a flower pollination(FP)algorithm assisted with a perturb&observe(P&O)MPPT approach for solar photovoltaic(SPV)systems integrated with *** ensure effective usage of both FP and P&O algorithms,this study incorporates and validates the hybrid-based MPPT *** proposed solar-powered IHGbC with a hybrid-based MPPT algorithm has been computationally modelled and simulated using MATLAb®and Simulink®for both uniform and non-uniform irradiation and analysed for voltage gain,ripples in the output waveforms and convergence *** proposed hybrid-based MPPT is based on a number of flowers that forecast the initial global peak,assisted by P&O in the last stage for faster convergence to attain the maximum power point(MPP).As a result,the hybrid-based MPPT approach alleviates the computational issues encountered in P&O and FP-based MPP *** proposed hybrid MPPT is compared with conventional MPPT for SPV and the results show that the solar-powered IHGbC using a hybrid-based MPPT technique has negligible oscillations of 0.14%with a high-voltage gain of 7.992 and a fast convergence rate of 0.05 seconds compared to individual P&O-based MPPT and FP-based MPPT *** simulation results of the proposed MPPT with IHGbC outperform the conventional MPPT with high-gain converters.

关键词： flower pollination interleaved high-gain boost converter maximum power point tracking technique perturb&observe solar photovoltaic

bRUCK FORMULA FOR A PERTURbED LIPSCHITZIAN ITERATION OF LIPSCHITZ PSEUDOCONTRACTIVE MAPS

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Applied Mathematics and Mechanics(English Edition) 2005年第11期26卷 1427-1434页

作者： Krishna kumar.b. K. Sharma ZHOU Zhe-wei School of Studies in Mathematics Pt. Ravishankar Shukla University Raipur Chhattisgarh-492010 India 不详

The solution to evolution equations has developed an independent theory within nonlinear analysis dealing with the existence and approximation of such solution （ fixed point） of pseudocontractive operators and its variants. The object is to introduce a perturbed iteration method for proving the convergence of sequence of Lipschitzian pseudocontractive mapping using approximate fixed point technique. This iteration can be ued for nonlinear operators which are more general than Lipschitzian pseudocontractive operator and bruck iteration fails for proving their convergence. Our results generalize the results of Chidume and Zegeye.

关键词： pseudocontractive map perturbed Lipschitzian iteration fixed point uniformaly Gateaux differential norm

bottomonium Spectrum and Decays with One Gluon Exchange Potential

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Communications in Theoretical Physics 2011年第9期56卷 476-480页

作者： Antony Prakash Monteiro K.b.Vijaya kumar.b.aghyesh Department of Physics Mangalore UniversityMangalagangotriMangalore 574199India

The phenomenological non-relativistic quark model （NRQM） has been employed to obtain the masses of bottomonium states. In the frame work of NRQM an exhaustive study of radiative and leptonic decays has been made. The Hamiltonian used in the investigation has kinetic energy, confinement potentiM and one gluon exchange potential （OGEP）. An overall agreement is obtained with the experimental masses and decay widths.

关键词： quark model one gluon exchange potential bottomonium states leptonic and radiative decays